Adding upstream version 2:8.2.2434.upstream/2%8.2.2434upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 5593 insertions, 0 deletions

diff --git a/src/gui.c b/src/gui.c
new file mode 100644
index 0000000..0265f7c
--- /dev/null
+++ b/src/gui.c
@@ -0,0 +1,5593 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved		by Bram Moolenaar
+ *				GUI/Motif support by Robert Webb
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+#include "vim.h"
+
+// Structure containing all the GUI information
+gui_T gui;
+
+#if !defined(FEAT_GUI_GTK)
+static void set_guifontwide(char_u *font_name);
+#endif
+static void gui_check_pos(void);
+static void gui_reset_scroll_region(void);
+static void gui_outstr(char_u *, int);
+static int gui_screenchar(int off, int flags, guicolor_T fg, guicolor_T bg, int back);
+static int gui_outstr_nowrap(char_u *s, int len, int flags, guicolor_T fg, guicolor_T bg, int back);
+static void gui_delete_lines(int row, int count);
+static void gui_insert_lines(int row, int count);
+static int gui_xy2colrow(int x, int y, int *colp);
+#if defined(FEAT_GUI_TABLINE) || defined(PROTO)
+static int gui_has_tabline(void);
+#endif
+static void gui_do_scrollbar(win_T *wp, int which, int enable);
+static void gui_update_horiz_scrollbar(int);
+static void gui_set_fg_color(char_u *name);
+static void gui_set_bg_color(char_u *name);
+static win_T *xy2win(int x, int y, mouse_find_T popup);
+
+#ifdef GUI_MAY_FORK
+static void gui_do_fork(void);
+
+static int gui_read_child_pipe(int fd);
+
+// Return values for gui_read_child_pipe
+enum {
+    GUI_CHILD_IO_ERROR,
+    GUI_CHILD_OK,
+    GUI_CHILD_FAILED
+};
+#endif
+
+static void gui_attempt_start(void);
+
+static int can_update_cursor = TRUE; // can display the cursor
+static int disable_flush = 0;	// If > 0, gui_mch_flush() is disabled.
+
+/*
+ * The Athena scrollbars can move the thumb to after the end of the scrollbar,
+ * this makes the thumb indicate the part of the text that is shown.  Motif
+ * can't do this.
+ */
+#if defined(FEAT_GUI_ATHENA)
+# define SCROLL_PAST_END
+#endif
+
+/*
+ * gui_start -- Called when user wants to start the GUI.
+ *
+ * Careful: This function can be called recursively when there is a ":gui"
+ * command in the .gvimrc file.  Only the first call should fork, not the
+ * recursive call.
+ */
+    void
+gui_start(char_u *arg UNUSED)
+{
+    char_u	*old_term;
+    static int	recursive = 0;
+#if defined(GUI_MAY_SPAWN) && defined(EXPERIMENTAL_GUI_CMD)
+    char	*msg = NULL;
+#endif
+
+    old_term = vim_strsave(T_NAME);
+
+    settmode(TMODE_COOK);		// stop RAW mode
+    if (full_screen)
+	cursor_on();			// needed for ":gui" in .vimrc
+    full_screen = FALSE;
+
+    ++recursive;
+
+#ifdef GUI_MAY_FORK
+    /*
+     * Quit the current process and continue in the child.
+     * Makes "gvim file" disconnect from the shell it was started in.
+     * Don't do this when Vim was started with "-f" or the 'f' flag is present
+     * in 'guioptions'.
+     * Don't do this when there is a running job, we can only get the status
+     * of a child from the parent.
+     */
+    if (gui.dofork && !vim_strchr(p_go, GO_FORG) && recursive <= 1
+# ifdef FEAT_JOB_CHANNEL
+	    && !job_any_running()
+# endif
+	    )
+    {
+	gui_do_fork();
+    }
+    else
+#endif
+#ifdef GUI_MAY_SPAWN
+    if (gui.dospawn
+# ifdef EXPERIMENTAL_GUI_CMD
+	    && gui.dofork
+# endif
+	    && !vim_strchr(p_go, GO_FORG)
+	    && !anyBufIsChanged()
+# ifdef FEAT_JOB_CHANNEL
+	    && !job_any_running()
+# endif
+	    )
+    {
+# ifdef EXPERIMENTAL_GUI_CMD
+	msg =
+# endif
+	    gui_mch_do_spawn(arg);
+    }
+    else
+#endif
+    {
+#ifdef FEAT_GUI_GTK
+	// If there is 'f' in 'guioptions' and specify -g argument,
+	// gui_mch_init_check() was not called yet.
+	if (gui_mch_init_check() != OK)
+	    getout_preserve_modified(1);
+#endif
+	gui_attempt_start();
+    }
+
+    if (!gui.in_use)			// failed to start GUI
+    {
+	// Back to old term settings
+	//
+	// FIXME: If we got here because a child process failed and flagged to
+	// the parent to resume, and X11 is enabled with FEAT_TITLE, this will
+	// hit an X11 I/O error and do a longjmp(), leaving recursive
+	// permanently set to 1. This is probably not as big a problem as it
+	// sounds, because gui_mch_init() in both gui_x11.c and gui_gtk_x11.c
+	// return "OK" unconditionally, so it would be very difficult to
+	// actually hit this case.
+	termcapinit(old_term);
+	settmode(TMODE_RAW);		// restart RAW mode
+#ifdef FEAT_TITLE
+	set_title_defaults();		// set 'title' and 'icon' again
+#endif
+#if defined(GUI_MAY_SPAWN) && defined(EXPERIMENTAL_GUI_CMD)
+	if (msg)
+	    emsg(msg);
+#endif
+    }
+
+    vim_free(old_term);
+
+    // If the GUI started successfully, trigger the GUIEnter event, otherwise
+    // the GUIFailed event.
+    gui_mch_update();
+    apply_autocmds(gui.in_use ? EVENT_GUIENTER : EVENT_GUIFAILED,
+						   NULL, NULL, FALSE, curbuf);
+    --recursive;
+}
+
+/*
+ * Set_termname() will call gui_init() to start the GUI.
+ * Set the "starting" flag, to indicate that the GUI will start.
+ *
+ * We don't want to open the GUI shell until after we've read .gvimrc,
+ * otherwise we don't know what font we will use, and hence we don't know
+ * what size the shell should be.  So if there are errors in the .gvimrc
+ * file, they will have to go to the terminal: Set full_screen to FALSE.
+ * full_screen will be set to TRUE again by a successful termcapinit().
+ */
+    static void
+gui_attempt_start(void)
+{
+    static int recursive = 0;
+
+    ++recursive;
+    gui.starting = TRUE;
+
+#ifdef FEAT_GUI_GTK
+    gui.event_time = GDK_CURRENT_TIME;
+#endif
+
+    termcapinit((char_u *)"builtin_gui");
+    gui.starting = recursive - 1;
+
+#if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11)
+    if (gui.in_use)
+    {
+# ifdef FEAT_EVAL
+	Window	x11_window;
+	Display	*x11_display;
+
+	if (gui_get_x11_windis(&x11_window, &x11_display) == OK)
+	    set_vim_var_nr(VV_WINDOWID, (long)x11_window);
+# endif
+
+	// Display error messages in a dialog now.
+	display_errors();
+    }
+#endif
+    --recursive;
+}
+
+#ifdef GUI_MAY_FORK
+
+// for waitpid()
+# if defined(HAVE_SYS_WAIT_H) || defined(HAVE_UNION_WAIT)
+#  include <sys/wait.h>
+# endif
+
+/*
+ * Create a new process, by forking. In the child, start the GUI, and in
+ * the parent, exit.
+ *
+ * If something goes wrong, this will return with gui.in_use still set
+ * to FALSE, in which case the caller should continue execution without
+ * the GUI.
+ *
+ * If the child fails to start the GUI, then the child will exit and the
+ * parent will return. If the child succeeds, then the parent will exit
+ * and the child will return.
+ */
+    static void
+gui_do_fork(void)
+{
+    int		pipefd[2];	// pipe between parent and child
+    int		pipe_error;
+    int		status;
+    int		exit_status;
+    pid_t	pid = -1;
+
+    // Setup a pipe between the child and the parent, so that the parent
+    // knows when the child has done the setsid() call and is allowed to
+    // exit.
+    pipe_error = (pipe(pipefd) < 0);
+    pid = fork();
+    if (pid < 0)	    // Fork error
+    {
+	emsg(_("E851: Failed to create a new process for the GUI"));
+	return;
+    }
+    else if (pid > 0)	    // Parent
+    {
+	// Give the child some time to do the setsid(), otherwise the
+	// exit() may kill the child too (when starting gvim from inside a
+	// gvim).
+	if (!pipe_error)
+	{
+	    // The read returns when the child closes the pipe (or when
+	    // the child dies for some reason).
+	    close(pipefd[1]);
+	    status = gui_read_child_pipe(pipefd[0]);
+	    if (status == GUI_CHILD_FAILED)
+	    {
+		// The child failed to start the GUI, so the caller must
+		// continue. There may be more error information written
+		// to stderr by the child.
+# ifdef __NeXT__
+		wait4(pid, &exit_status, 0, (struct rusage *)0);
+# else
+		waitpid(pid, &exit_status, 0);
+# endif
+		emsg(_("E852: The child process failed to start the GUI"));
+		return;
+	    }
+	    else if (status == GUI_CHILD_IO_ERROR)
+	    {
+		pipe_error = TRUE;
+	    }
+	    // else GUI_CHILD_OK: parent exit
+	}
+
+	if (pipe_error)
+	    ui_delay(301L, TRUE);
+
+	// When swapping screens we may need to go to the next line, e.g.,
+	// after a hit-enter prompt and using ":gui".
+	if (newline_on_exit)
+	    mch_errmsg("\r\n");
+
+	/*
+	 * The parent must skip the normal exit() processing, the child
+	 * will do it.  For example, GTK messes up signals when exiting.
+	 */
+	_exit(0);
+    }
+    // Child
+
+#ifdef FEAT_GUI_GTK
+    // Call gtk_init_check() here after fork(). See gui_init_check().
+    if (gui_mch_init_check() != OK)
+	getout_preserve_modified(1);
+#endif
+
+# if defined(HAVE_SETSID) || defined(HAVE_SETPGID)
+    /*
+     * Change our process group.  On some systems/shells a CTRL-C in the
+     * shell where Vim was started would otherwise kill gvim!
+     */
+#  if defined(HAVE_SETSID)
+    (void)setsid();
+#  else
+    (void)setpgid(0, 0);
+#  endif
+# endif
+    if (!pipe_error)
+	close(pipefd[0]);
+
+# if defined(FEAT_GUI_GNOME) && defined(FEAT_SESSION)
+    // Tell the session manager our new PID
+    gui_mch_forked();
+# endif
+
+    // Try to start the GUI
+    gui_attempt_start();
+
+    // Notify the parent
+    if (!pipe_error)
+    {
+	if (gui.in_use)
+	    write_eintr(pipefd[1], "ok", 3);
+	else
+	    write_eintr(pipefd[1], "fail", 5);
+	close(pipefd[1]);
+    }
+
+    // If we failed to start the GUI, exit now.
+    if (!gui.in_use)
+	getout_preserve_modified(1);
+}
+
+/*
+ * Read from a pipe assumed to be connected to the child process (this
+ * function is called from the parent).
+ * Return GUI_CHILD_OK if the child successfully started the GUI,
+ * GUY_CHILD_FAILED if the child failed, or GUI_CHILD_IO_ERROR if there was
+ * some other error.
+ *
+ * The file descriptor will be closed before the function returns.
+ */
+    static int
+gui_read_child_pipe(int fd)
+{
+    long	bytes_read;
+#define READ_BUFFER_SIZE 10
+    char	buffer[READ_BUFFER_SIZE];
+
+    bytes_read = read_eintr(fd, buffer, READ_BUFFER_SIZE - 1);
+#undef READ_BUFFER_SIZE
+    close(fd);
+    if (bytes_read < 0)
+	return GUI_CHILD_IO_ERROR;
+    buffer[bytes_read] = NUL;
+    if (strcmp(buffer, "ok") == 0)
+	return GUI_CHILD_OK;
+    return GUI_CHILD_FAILED;
+}
+
+#endif // GUI_MAY_FORK
+
+/*
+ * Call this when vim starts up, whether or not the GUI is started
+ */
+    void
+gui_prepare(int *argc, char **argv)
+{
+    gui.in_use = FALSE;		    // No GUI yet (maybe later)
+    gui.starting = FALSE;	    // No GUI yet (maybe later)
+    gui_mch_prepare(argc, argv);
+}
+
+/*
+ * Try initializing the GUI and check if it can be started.
+ * Used from main() to check early if "vim -g" can start the GUI.
+ * Used from gui_init() to prepare for starting the GUI.
+ * Returns FAIL or OK.
+ */
+    int
+gui_init_check(void)
+{
+    static int result = MAYBE;
+
+    if (result != MAYBE)
+    {
+	if (result == FAIL)
+	    emsg(_("E229: Cannot start the GUI"));
+	return result;
+    }
+
+    gui.shell_created = FALSE;
+    gui.dying = FALSE;
+    gui.in_focus = TRUE;		// so the guicursor setting works
+    gui.dragged_sb = SBAR_NONE;
+    gui.dragged_wp = NULL;
+    gui.pointer_hidden = FALSE;
+    gui.col = 0;
+    gui.row = 0;
+    gui.num_cols = Columns;
+    gui.num_rows = Rows;
+
+    gui.cursor_is_valid = FALSE;
+    gui.scroll_region_top = 0;
+    gui.scroll_region_bot = Rows - 1;
+    gui.scroll_region_left = 0;
+    gui.scroll_region_right = Columns - 1;
+    gui.highlight_mask = HL_NORMAL;
+    gui.char_width = 1;
+    gui.char_height = 1;
+    gui.char_ascent = 0;
+    gui.border_width = 0;
+
+    gui.norm_font = NOFONT;
+#ifndef FEAT_GUI_GTK
+    gui.bold_font = NOFONT;
+    gui.ital_font = NOFONT;
+    gui.boldital_font = NOFONT;
+# ifdef FEAT_XFONTSET
+    gui.fontset = NOFONTSET;
+# endif
+#endif
+    gui.wide_font = NOFONT;
+#ifndef FEAT_GUI_GTK
+    gui.wide_bold_font = NOFONT;
+    gui.wide_ital_font = NOFONT;
+    gui.wide_boldital_font = NOFONT;
+#endif
+
+#ifdef FEAT_MENU
+# ifndef FEAT_GUI_GTK
+#  ifdef FONTSET_ALWAYS
+    gui.menu_fontset = NOFONTSET;
+#  else
+    gui.menu_font = NOFONT;
+#  endif
+# endif
+    gui.menu_is_active = TRUE;	    // default: include menu
+# ifndef FEAT_GUI_GTK
+    gui.menu_height = MENU_DEFAULT_HEIGHT;
+    gui.menu_width = 0;
+# endif
+#endif
+#if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA) \
+	|| defined(FEAT_GUI_HAIKU))
+    gui.toolbar_height = 0;
+#endif
+#if defined(FEAT_FOOTER) && defined(FEAT_GUI_MOTIF)
+    gui.footer_height = 0;
+#endif
+#ifdef FEAT_BEVAL_TIP
+    gui.tooltip_fontset = NOFONTSET;
+#endif
+
+    gui.scrollbar_width = gui.scrollbar_height = SB_DEFAULT_WIDTH;
+    gui.prev_wrap = -1;
+
+#if defined(ALWAYS_USE_GUI) || defined(VIMDLL)
+    result = OK;
+#else
+# ifdef FEAT_GUI_GTK
+    /*
+     * Note: Don't call gtk_init_check() before fork, it will be called after
+     * the fork. When calling it before fork, it make vim hang for a while.
+     * See gui_do_fork().
+     * Use a simpler check if the GUI window can probably be opened.
+     */
+    result = gui.dofork ? gui_mch_early_init_check(TRUE) : gui_mch_init_check();
+# else
+    result = gui_mch_init_check();
+# endif
+#endif
+    return result;
+}
+
+/*
+ * This is the call which starts the GUI.
+ */
+    void
+gui_init(void)
+{
+    win_T	*wp;
+    static int	recursive = 0;
+
+    /*
+     * It's possible to use ":gui" in a .gvimrc file.  The first halve of this
+     * function will then be executed at the first call, the rest by the
+     * recursive call.  This allow the shell to be opened halfway reading a
+     * gvimrc file.
+     */
+    if (!recursive)
+    {
+	++recursive;
+
+	clip_init(TRUE);
+
+	// If can't initialize, don't try doing the rest
+	if (gui_init_check() == FAIL)
+	{
+	    --recursive;
+	    clip_init(FALSE);
+	    return;
+	}
+
+	/*
+	 * Reset 'paste'.  It's useful in the terminal, but not in the GUI.  It
+	 * breaks the Paste toolbar button.
+	 */
+	set_option_value((char_u *)"paste", 0L, NULL, 0);
+
+	// Set t_Co to the number of colors: RGB.
+	set_color_count(256 * 256 * 256);
+
+	/*
+	 * Set up system-wide default menus.
+	 */
+#if defined(SYS_MENU_FILE) && defined(FEAT_MENU)
+	if (vim_strchr(p_go, GO_NOSYSMENU) == NULL)
+	{
+	    sys_menu = TRUE;
+	    do_source((char_u *)SYS_MENU_FILE, FALSE, DOSO_NONE, NULL);
+	    sys_menu = FALSE;
+	}
+#endif
+
+	/*
+	 * Switch on the mouse by default, unless the user changed it already.
+	 * This can then be changed in the .gvimrc.
+	 */
+	if (!option_was_set((char_u *)"mouse"))
+	    set_string_option_direct((char_u *)"mouse", -1,
+					   (char_u *)"a", OPT_FREE, SID_NONE);
+
+	/*
+	 * If -U option given, use only the initializations from that file and
+	 * nothing else.  Skip all initializations for "-U NONE" or "-u NORC".
+	 */
+	if (use_gvimrc != NULL)
+	{
+	    if (STRCMP(use_gvimrc, "NONE") != 0
+		    && STRCMP(use_gvimrc, "NORC") != 0
+		    && do_source(use_gvimrc, FALSE, DOSO_NONE, NULL) != OK)
+		semsg(_("E230: Cannot read from \"%s\""), use_gvimrc);
+	}
+	else
+	{
+	    /*
+	     * Get system wide defaults for gvim, only when file name defined.
+	     */
+#ifdef SYS_GVIMRC_FILE
+	    do_source((char_u *)SYS_GVIMRC_FILE, FALSE, DOSO_NONE, NULL);
+#endif
+
+	    /*
+	     * Try to read GUI initialization commands from the following
+	     * places:
+	     * - environment variable GVIMINIT
+	     * - the user gvimrc file (~/.gvimrc)
+	     * - the second user gvimrc file ($VIM/.gvimrc for Dos)
+	     * - the third user gvimrc file ($VIM/.gvimrc for Amiga)
+	     * The first that exists is used, the rest is ignored.
+	     */
+	    if (process_env((char_u *)"GVIMINIT", FALSE) == FAIL
+		 && do_source((char_u *)USR_GVIMRC_FILE, TRUE,
+						     DOSO_GVIMRC, NULL) == FAIL
+#ifdef USR_GVIMRC_FILE2
+		 && do_source((char_u *)USR_GVIMRC_FILE2, TRUE,
+						     DOSO_GVIMRC, NULL) == FAIL
+#endif
+#ifdef USR_GVIMRC_FILE3
+		 && do_source((char_u *)USR_GVIMRC_FILE3, TRUE,
+						     DOSO_GVIMRC, NULL) == FAIL
+#endif
+				)
+	    {
+#ifdef USR_GVIMRC_FILE4
+		(void)do_source((char_u *)USR_GVIMRC_FILE4, TRUE,
+							    DOSO_GVIMRC, NULL);
+#endif
+	    }
+
+	    /*
+	     * Read initialization commands from ".gvimrc" in current
+	     * directory.  This is only done if the 'exrc' option is set.
+	     * Because of security reasons we disallow shell and write
+	     * commands now, except for unix if the file is owned by the user
+	     * or 'secure' option has been reset in environment of global
+	     * ".gvimrc".
+	     * Only do this if GVIMRC_FILE is not the same as USR_GVIMRC_FILE,
+	     * USR_GVIMRC_FILE2, USR_GVIMRC_FILE3 or SYS_GVIMRC_FILE.
+	     */
+	    if (p_exrc)
+	    {
+#ifdef UNIX
+		{
+		    stat_T s;
+
+		    // if ".gvimrc" file is not owned by user, set 'secure'
+		    // mode
+		    if (mch_stat(GVIMRC_FILE, &s) || s.st_uid != getuid())
+			secure = p_secure;
+		}
+#else
+		secure = p_secure;
+#endif
+
+		if (       fullpathcmp((char_u *)USR_GVIMRC_FILE,
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
+#ifdef SYS_GVIMRC_FILE
+			&& fullpathcmp((char_u *)SYS_GVIMRC_FILE,
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
+#endif
+#ifdef USR_GVIMRC_FILE2
+			&& fullpathcmp((char_u *)USR_GVIMRC_FILE2,
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
+#endif
+#ifdef USR_GVIMRC_FILE3
+			&& fullpathcmp((char_u *)USR_GVIMRC_FILE3,
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
+#endif
+#ifdef USR_GVIMRC_FILE4
+			&& fullpathcmp((char_u *)USR_GVIMRC_FILE4,
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
+#endif
+			)
+		    do_source((char_u *)GVIMRC_FILE, TRUE, DOSO_GVIMRC, NULL);
+
+		if (secure == 2)
+		    need_wait_return = TRUE;
+		secure = 0;
+	    }
+	}
+
+	if (need_wait_return || msg_didany)
+	    wait_return(TRUE);
+
+	--recursive;
+    }
+
+    // If recursive call opened the shell, return here from the first call
+    if (gui.in_use)
+	return;
+
+    /*
+     * Create the GUI shell.
+     */
+    gui.in_use = TRUE;		// Must be set after menus have been set up
+    if (gui_mch_init() == FAIL)
+	goto error;
+
+    // Avoid a delay for an error message that was printed in the terminal
+    // where Vim was started.
+    emsg_on_display = FALSE;
+    msg_scrolled = 0;
+    clear_sb_text(TRUE);
+    need_wait_return = FALSE;
+    msg_didany = FALSE;
+
+    /*
+     * Check validity of any generic resources that may have been loaded.
+     */
+    if (gui.border_width < 0)
+	gui.border_width = 0;
+
+    /*
+     * Set up the fonts.  First use a font specified with "-fn" or "-font".
+     */
+    if (font_argument != NULL)
+	set_option_value((char_u *)"gfn", 0L, (char_u *)font_argument, 0);
+    if (
+#ifdef FEAT_XFONTSET
+	    (*p_guifontset == NUL
+	     || gui_init_font(p_guifontset, TRUE) == FAIL) &&
+#endif
+	    gui_init_font(*p_guifont == NUL ? hl_get_font_name()
+						  : p_guifont, FALSE) == FAIL)
+    {
+	emsg(_("E665: Cannot start GUI, no valid font found"));
+	goto error2;
+    }
+    if (gui_get_wide_font() == FAIL)
+	emsg(_("E231: 'guifontwide' invalid"));
+
+    gui.num_cols = Columns;
+    gui.num_rows = Rows;
+    gui_reset_scroll_region();
+
+    // Create initial scrollbars
+    FOR_ALL_WINDOWS(wp)
+    {
+	gui_create_scrollbar(&wp->w_scrollbars[SBAR_LEFT], SBAR_LEFT, wp);
+	gui_create_scrollbar(&wp->w_scrollbars[SBAR_RIGHT], SBAR_RIGHT, wp);
+    }
+    gui_create_scrollbar(&gui.bottom_sbar, SBAR_BOTTOM, NULL);
+
+#ifdef FEAT_MENU
+    gui_create_initial_menus(root_menu);
+#endif
+#ifdef FEAT_SIGN_ICONS
+    sign_gui_started();
+#endif
+
+    // Configure the desired menu and scrollbars
+    gui_init_which_components(NULL);
+
+    // All components of the GUI have been created now
+    gui.shell_created = TRUE;
+
+#ifdef FEAT_GUI_MSWIN
+    // Set the shell size, adjusted for the screen size.  For GTK this only
+    // works after the shell has been opened, thus it is further down.
+    // If the window is already maximized (e.g. when --windowid is passed in),
+    // we want to use the system-provided dimensions by passing FALSE to
+    // mustset. Otherwise, we want to initialize with the default rows/columns.
+    if (gui_mch_maximized())
+	gui_set_shellsize(FALSE, TRUE, RESIZE_BOTH);
+    else
+	gui_set_shellsize(TRUE, TRUE, RESIZE_BOTH);
+#else
+# ifndef FEAT_GUI_GTK
+    gui_set_shellsize(FALSE, TRUE, RESIZE_BOTH);
+# endif
+#endif
+#if defined(FEAT_GUI_MOTIF) && defined(FEAT_MENU)
+    // Need to set the size of the menubar after all the menus have been
+    // created.
+    gui_mch_compute_menu_height((Widget)0);
+#endif
+
+    /*
+     * Actually open the GUI shell.
+     */
+    if (gui_mch_open() != FAIL)
+    {
+#ifdef FEAT_TITLE
+	maketitle();
+	resettitle();
+#endif
+	init_gui_options();
+#ifdef FEAT_ARABIC
+	// Our GUI can't do bidi.
+	p_tbidi = FALSE;
+#endif
+#if defined(FEAT_GUI_GTK)
+	// Give GTK+ a chance to put all widget's into place.
+	gui_mch_update();
+
+# ifdef FEAT_MENU
+	// If there is no 'm' in 'guioptions' we need to remove the menu now.
+	// It was still there to make F10 work.
+	if (vim_strchr(p_go, GO_MENUS) == NULL)
+	{
+	    --gui.starting;
+	    gui_mch_enable_menu(FALSE);
+	    ++gui.starting;
+	    gui_mch_update();
+	}
+# endif
+
+	// Now make sure the shell fits on the screen.
+	if (gui_mch_maximized())
+	    gui_set_shellsize(FALSE, TRUE, RESIZE_BOTH);
+	else
+	    gui_set_shellsize(TRUE, TRUE, RESIZE_BOTH);
+#endif
+	// When 'lines' was set while starting up the topframe may have to be
+	// resized.
+	win_new_shellsize();
+
+#ifdef FEAT_BEVAL_GUI
+	// Always create the Balloon Evaluation area, but disable it when
+	// 'ballooneval' is off.
+	if (balloonEval != NULL)
+	{
+# ifdef FEAT_VARTABS
+	    vim_free(balloonEval->vts);
+# endif
+	    vim_free(balloonEval);
+	}
+	balloonEvalForTerm = FALSE;
+# ifdef FEAT_GUI_GTK
+	balloonEval = gui_mch_create_beval_area(gui.drawarea, NULL,
+						     &general_beval_cb, NULL);
+# else
+#  if defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA)
+	{
+	    extern Widget	textArea;
+	    balloonEval = gui_mch_create_beval_area(textArea, NULL,
+						     &general_beval_cb, NULL);
+	}
+#  else
+#   ifdef FEAT_GUI_MSWIN
+	balloonEval = gui_mch_create_beval_area(NULL, NULL,
+						     &general_beval_cb, NULL);
+#   endif
+#  endif
+# endif
+	if (!p_beval)
+	    gui_mch_disable_beval_area(balloonEval);
+#endif
+
+#ifndef FEAT_GUI_MSWIN
+	// In the GUI modifiers are prepended to keys.
+	// Don't do this for MS-Windows yet, it sends CTRL-K without the
+	// modifier.
+	seenModifyOtherKeys = TRUE;
+#endif
+
+#if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
+	if (!im_xim_isvalid_imactivate())
+	    emsg(_("E599: Value of 'imactivatekey' is invalid"));
+#endif
+	// When 'cmdheight' was set during startup it may not have taken
+	// effect yet.
+	if (p_ch != 1L)
+	    command_height();
+
+	return;
+    }
+
+error2:
+#ifdef FEAT_GUI_X11
+    // undo gui_mch_init()
+    gui_mch_uninit();
+#endif
+
+error:
+    gui.in_use = FALSE;
+    clip_init(FALSE);
+}
+
+
+    void
+gui_exit(int rc)
+{
+    // don't free the fonts, it leads to a BUS error
+    // richard@whitequeen.com Jul 99
+    free_highlight_fonts();
+    gui.in_use = FALSE;
+    gui_mch_exit(rc);
+}
+
+#if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11) || defined(FEAT_GUI_MSWIN) \
+	|| defined(FEAT_GUI_PHOTON) || defined(PROTO)
+# define NEED_GUI_UPDATE_SCREEN 1
+/*
+ * Called when the GUI shell is closed by the user.  If there are no changed
+ * files Vim exits, otherwise there will be a dialog to ask the user what to
+ * do.
+ * When this function returns, Vim should NOT exit!
+ */
+    void
+gui_shell_closed(void)
+{
+    cmdmod_T	    save_cmdmod;
+
+    save_cmdmod = cmdmod;
+
+    // Only exit when there are no changed files
+    exiting = TRUE;
+# ifdef FEAT_BROWSE
+    cmdmod.cmod_flags |= CMOD_BROWSE;
+# endif
+# if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
+    cmdmod.cmod_flags |= CMOD_CONFIRM;
+# endif
+    // If there are changed buffers, present the user with a dialog if
+    // possible, otherwise give an error message.
+    if (!check_changed_any(FALSE, FALSE))
+	getout(0);
+
+    exiting = FALSE;
+    cmdmod = save_cmdmod;
+    gui_update_screen();	// redraw, window may show changed buffer
+}
+#endif
+
+/*
+ * Set the font.  "font_list" is a comma separated list of font names.  The
+ * first font name that works is used.  If none is found, use the default
+ * font.
+ * If "fontset" is TRUE, the "font_list" is used as one name for the fontset.
+ * Return OK when able to set the font.  When it failed FAIL is returned and
+ * the fonts are unchanged.
+ */
+    int
+gui_init_font(char_u *font_list, int fontset UNUSED)
+{
+#define FONTLEN 320
+    char_u	font_name[FONTLEN];
+    int		font_list_empty = FALSE;
+    int		ret = FAIL;
+
+    if (!gui.in_use)
+	return FAIL;
+
+    font_name[0] = NUL;
+    if (*font_list == NUL)
+	font_list_empty = TRUE;
+    else
+    {
+#ifdef FEAT_XFONTSET
+	// When using a fontset, the whole list of fonts is one name.
+	if (fontset)
+	    ret = gui_mch_init_font(font_list, TRUE);
+	else
+#endif
+	    while (*font_list != NUL)
+	    {
+		// Isolate one comma separated font name.
+		(void)copy_option_part(&font_list, font_name, FONTLEN, ",");
+
+		// Careful!!!  The Win32 version of gui_mch_init_font(), when
+		// called with "*" will change p_guifont to the selected font
+		// name, which frees the old value.  This makes font_list
+		// invalid.  Thus when OK is returned here, font_list must no
+		// longer be used!
+		if (gui_mch_init_font(font_name, FALSE) == OK)
+		{
+#if !defined(FEAT_GUI_GTK)
+		    // If it's a Unicode font, try setting 'guifontwide' to a
+		    // similar double-width font.
+		    if ((p_guifontwide == NULL || *p_guifontwide == NUL)
+				&& strstr((char *)font_name, "10646") != NULL)
+			set_guifontwide(font_name);
+#endif
+		    ret = OK;
+		    break;
+		}
+	    }
+    }
+
+    if (ret != OK
+	    && STRCMP(font_list, "*") != 0
+	    && (font_list_empty || gui.norm_font == NOFONT))
+    {
+	/*
+	 * Couldn't load any font in 'font_list', keep the current font if
+	 * there is one.  If 'font_list' is empty, or if there is no current
+	 * font, tell gui_mch_init_font() to try to find a font we can load.
+	 */
+	ret = gui_mch_init_font(NULL, FALSE);
+    }
+
+    if (ret == OK)
+    {
+#ifndef FEAT_GUI_GTK
+	// Set normal font as current font
+# ifdef FEAT_XFONTSET
+	if (gui.fontset != NOFONTSET)
+	    gui_mch_set_fontset(gui.fontset);
+	else
+# endif
+	    gui_mch_set_font(gui.norm_font);
+#endif
+	gui_set_shellsize(FALSE, TRUE, RESIZE_BOTH);
+    }
+
+    return ret;
+}
+
+#ifndef FEAT_GUI_GTK
+/*
+ * Try setting 'guifontwide' to a font twice as wide as "name".
+ */
+    static void
+set_guifontwide(char_u *name)
+{
+    int		i = 0;
+    char_u	wide_name[FONTLEN + 10]; // room for 2 * width and '*'
+    char_u	*wp = NULL;
+    char_u	*p;
+    GuiFont	font;
+
+    wp = wide_name;
+    for (p = name; *p != NUL; ++p)
+    {
+	*wp++ = *p;
+	if (*p == '-')
+	{
+	    ++i;
+	    if (i == 6)		// font type: change "--" to "-*-"
+	    {
+		if (p[1] == '-')
+		    *wp++ = '*';
+	    }
+	    else if (i == 12)	// found the width
+	    {
+		++p;
+		i = getdigits(&p);
+		if (i != 0)
+		{
+		    // Double the width specification.
+		    sprintf((char *)wp, "%d%s", i * 2, p);
+		    font = gui_mch_get_font(wide_name, FALSE);
+		    if (font != NOFONT)
+		    {
+			gui_mch_free_font(gui.wide_font);
+			gui.wide_font = font;
+			set_string_option_direct((char_u *)"gfw", -1,
+						      wide_name, OPT_FREE, 0);
+		    }
+		}
+		break;
+	    }
+	}
+    }
+}
+#endif // !FEAT_GUI_GTK
+
+/*
+ * Get the font for 'guifontwide'.
+ * Return FAIL for an invalid font name.
+ */
+    int
+gui_get_wide_font(void)
+{
+    GuiFont	font = NOFONT;
+    char_u	font_name[FONTLEN];
+    char_u	*p;
+
+    if (!gui.in_use)	    // Can't allocate font yet, assume it's OK.
+	return OK;	    // Will give an error message later.
+
+    if (p_guifontwide != NULL && *p_guifontwide != NUL)
+    {
+	for (p = p_guifontwide; *p != NUL; )
+	{
+	    // Isolate one comma separated font name.
+	    (void)copy_option_part(&p, font_name, FONTLEN, ",");
+	    font = gui_mch_get_font(font_name, FALSE);
+	    if (font != NOFONT)
+		break;
+	}
+	if (font == NOFONT)
+	    return FAIL;
+    }
+
+    gui_mch_free_font(gui.wide_font);
+#ifdef FEAT_GUI_GTK
+    // Avoid unnecessary overhead if 'guifontwide' is equal to 'guifont'.
+    if (font != NOFONT && gui.norm_font != NOFONT
+			 && pango_font_description_equal(font, gui.norm_font))
+    {
+	gui.wide_font = NOFONT;
+	gui_mch_free_font(font);
+    }
+    else
+#endif
+	gui.wide_font = font;
+#ifdef FEAT_GUI_MSWIN
+    gui_mch_wide_font_changed();
+#else
+    /*
+     * TODO: setup wide_bold_font, wide_ital_font and wide_boldital_font to
+     * support those fonts for 'guifontwide'.
+     */
+#endif
+    return OK;
+}
+
+    static void
+gui_set_cursor(int row, int col)
+{
+    gui.row = row;
+    gui.col = col;
+}
+
+/*
+ * gui_check_pos - check if the cursor is on the screen.
+ */
+    static void
+gui_check_pos(void)
+{
+    if (gui.row >= screen_Rows)
+	gui.row = screen_Rows - 1;
+    if (gui.col >= screen_Columns)
+	gui.col = screen_Columns - 1;
+    if (gui.cursor_row >= screen_Rows || gui.cursor_col >= screen_Columns)
+	gui.cursor_is_valid = FALSE;
+}
+
+/*
+ * Redraw the cursor if necessary or when forced.
+ * Careful: The contents of ScreenLines[] must match what is on the screen,
+ * otherwise this goes wrong.  May need to call out_flush() first.
+ */
+    void
+gui_update_cursor(
+    int		force,		 // when TRUE, update even when not moved
+    int		clear_selection) // clear selection under cursor
+{
+    int		cur_width = 0;
+    int		cur_height = 0;
+    int		old_hl_mask;
+    cursorentry_T *shape;
+    int		id;
+#ifdef FEAT_TERMINAL
+    guicolor_T	shape_fg = INVALCOLOR;
+    guicolor_T	shape_bg = INVALCOLOR;
+#endif
+    guicolor_T	cfg, cbg, cc;	// cursor fore-/background color
+    int		cattr;		// cursor attributes
+    int		attr;
+    attrentry_T *aep = NULL;
+
+    // Don't update the cursor when halfway busy scrolling or the screen size
+    // doesn't match 'columns' and 'lines.  ScreenLines[] isn't valid then.
+    if (!can_update_cursor || screen_Columns != gui.num_cols
+					       || screen_Rows != gui.num_rows)
+	return;
+
+    gui_check_pos();
+    if (!gui.cursor_is_valid || force
+		    || gui.row != gui.cursor_row || gui.col != gui.cursor_col)
+    {
+	gui_undraw_cursor();
+	if (gui.row < 0)
+	    return;
+#ifdef HAVE_INPUT_METHOD
+	if (gui.row != gui.cursor_row || gui.col != gui.cursor_col)
+	    im_set_position(gui.row, gui.col);
+#endif
+	gui.cursor_row = gui.row;
+	gui.cursor_col = gui.col;
+
+	// Only write to the screen after ScreenLines[] has been initialized
+	if (!screen_cleared || ScreenLines == NULL)
+	    return;
+
+	// Clear the selection if we are about to write over it
+	if (clear_selection)
+	    clip_may_clear_selection(gui.row, gui.row);
+	// Check that the cursor is inside the shell (resizing may have made
+	// it invalid)
+	if (gui.row >= screen_Rows || gui.col >= screen_Columns)
+	    return;
+
+	gui.cursor_is_valid = TRUE;
+
+	/*
+	 * How the cursor is drawn depends on the current mode.
+	 * When in a terminal window use the shape/color specified there.
+	 */
+#ifdef FEAT_TERMINAL
+	if (terminal_is_active())
+	    shape = term_get_cursor_shape(&shape_fg, &shape_bg);
+	else
+#endif
+	    shape = &shape_table[get_shape_idx(FALSE)];
+	if (State & LANGMAP)
+	    id = shape->id_lm;
+	else
+	    id = shape->id;
+
+	// get the colors and attributes for the cursor.  Default is inverted
+	cfg = INVALCOLOR;
+	cbg = INVALCOLOR;
+	cattr = HL_INVERSE;
+	gui_mch_set_blinking(shape->blinkwait,
+			     shape->blinkon,
+			     shape->blinkoff);
+	if (shape->blinkwait == 0 || shape->blinkon == 0
+						       || shape->blinkoff == 0)
+	    gui_mch_stop_blink(FALSE);
+#ifdef FEAT_TERMINAL
+	if (shape_bg != INVALCOLOR)
+	{
+	    cattr = 0;
+	    cfg = shape_fg;
+	    cbg = shape_bg;
+	}
+	else
+#endif
+	if (id > 0)
+	{
+	    cattr = syn_id2colors(id, &cfg, &cbg);
+#if defined(HAVE_INPUT_METHOD)
+	    {
+		static int iid;
+		guicolor_T fg, bg;
+
+		if (
+# if defined(FEAT_GUI_GTK) && defined(FEAT_XIM)
+			preedit_get_status()
+# else
+			im_get_status()
+# endif
+			)
+		{
+		    iid = syn_name2id((char_u *)"CursorIM");
+		    if (iid > 0)
+		    {
+			syn_id2colors(iid, &fg, &bg);
+			if (bg != INVALCOLOR)
+			    cbg = bg;
+			if (fg != INVALCOLOR)
+			    cfg = fg;
+		    }
+		}
+	    }
+#endif
+	}
+
+	/*
+	 * Get the attributes for the character under the cursor.
+	 * When no cursor color was given, use the character color.
+	 */
+	attr = ScreenAttrs[LineOffset[gui.row] + gui.col];
+	if (attr > HL_ALL)
+	    aep = syn_gui_attr2entry(attr);
+	if (aep != NULL)
+	{
+	    attr = aep->ae_attr;
+	    if (cfg == INVALCOLOR)
+		cfg = ((attr & HL_INVERSE)  ? aep->ae_u.gui.bg_color
+					    : aep->ae_u.gui.fg_color);
+	    if (cbg == INVALCOLOR)
+		cbg = ((attr & HL_INVERSE)  ? aep->ae_u.gui.fg_color
+					    : aep->ae_u.gui.bg_color);
+	}
+	if (cfg == INVALCOLOR)
+	    cfg = (attr & HL_INVERSE) ? gui.back_pixel : gui.norm_pixel;
+	if (cbg == INVALCOLOR)
+	    cbg = (attr & HL_INVERSE) ? gui.norm_pixel : gui.back_pixel;
+
+#ifdef FEAT_XIM
+	if (aep != NULL)
+	{
+	    xim_bg_color = ((attr & HL_INVERSE) ? aep->ae_u.gui.fg_color
+						: aep->ae_u.gui.bg_color);
+	    xim_fg_color = ((attr & HL_INVERSE) ? aep->ae_u.gui.bg_color
+						: aep->ae_u.gui.fg_color);
+	    if (xim_bg_color == INVALCOLOR)
+		xim_bg_color = (attr & HL_INVERSE) ? gui.norm_pixel
+						   : gui.back_pixel;
+	    if (xim_fg_color == INVALCOLOR)
+		xim_fg_color = (attr & HL_INVERSE) ? gui.back_pixel
+						   : gui.norm_pixel;
+	}
+	else
+	{
+	    xim_bg_color = (attr & HL_INVERSE) ? gui.norm_pixel
+					       : gui.back_pixel;
+	    xim_fg_color = (attr & HL_INVERSE) ? gui.back_pixel
+					       : gui.norm_pixel;
+	}
+#endif
+
+	attr &= ~HL_INVERSE;
+	if (cattr & HL_INVERSE)
+	{
+	    cc = cbg;
+	    cbg = cfg;
+	    cfg = cc;
+	}
+	cattr &= ~HL_INVERSE;
+
+	/*
+	 * When we don't have window focus, draw a hollow cursor.
+	 */
+	if (!gui.in_focus)
+	{
+	    gui_mch_draw_hollow_cursor(cbg);
+	    return;
+	}
+
+	old_hl_mask = gui.highlight_mask;
+	if (shape->shape == SHAPE_BLOCK)
+	{
+	    /*
+	     * Draw the text character with the cursor colors.	Use the
+	     * character attributes plus the cursor attributes.
+	     */
+	    gui.highlight_mask = (cattr | attr);
+	    (void)gui_screenchar(LineOffset[gui.row] + gui.col,
+			GUI_MON_IS_CURSOR | GUI_MON_NOCLEAR, cfg, cbg, 0);
+	}
+	else
+	{
+#if defined(FEAT_RIGHTLEFT)
+	    int	    col_off = FALSE;
+#endif
+	    /*
+	     * First draw the partial cursor, then overwrite with the text
+	     * character, using a transparent background.
+	     */
+	    if (shape->shape == SHAPE_VER)
+	    {
+		cur_height = gui.char_height;
+		cur_width = (gui.char_width * shape->percentage + 99) / 100;
+	    }
+	    else
+	    {
+		cur_height = (gui.char_height * shape->percentage + 99) / 100;
+		cur_width = gui.char_width;
+	    }
+	    if (has_mbyte && (*mb_off2cells)(LineOffset[gui.row] + gui.col,
+				    LineOffset[gui.row] + screen_Columns) > 1)
+	    {
+		// Double wide character.
+		if (shape->shape != SHAPE_VER)
+		    cur_width += gui.char_width;
+#ifdef FEAT_RIGHTLEFT
+		if (CURSOR_BAR_RIGHT)
+		{
+		    // gui.col points to the left halve of the character but
+		    // the vertical line needs to be on the right halve.
+		    // A double-wide horizontal line is also drawn from the
+		    // right halve in gui_mch_draw_part_cursor().
+		    col_off = TRUE;
+		    ++gui.col;
+		}
+#endif
+	    }
+	    gui_mch_draw_part_cursor(cur_width, cur_height, cbg);
+#if defined(FEAT_RIGHTLEFT)
+	    if (col_off)
+		--gui.col;
+#endif
+
+#ifndef FEAT_GUI_MSWIN	    // doesn't seem to work for MSWindows
+	    gui.highlight_mask = ScreenAttrs[LineOffset[gui.row] + gui.col];
+	    (void)gui_screenchar(LineOffset[gui.row] + gui.col,
+		    GUI_MON_TRS_CURSOR | GUI_MON_NOCLEAR,
+		    (guicolor_T)0, (guicolor_T)0, 0);
+#endif
+	}
+	gui.highlight_mask = old_hl_mask;
+    }
+}
+
+#if defined(FEAT_MENU) || defined(PROTO)
+    void
+gui_position_menu(void)
+{
+# if !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MOTIF)
+    if (gui.menu_is_active && gui.in_use)
+	gui_mch_set_menu_pos(0, 0, gui.menu_width, gui.menu_height);
+# endif
+}
+#endif
+
+/*
+ * Position the various GUI components (text area, menu).  The vertical
+ * scrollbars are NOT handled here.  See gui_update_scrollbars().
+ */
+    static void
+gui_position_components(int total_width UNUSED)
+{
+    int	    text_area_x;
+    int	    text_area_y;
+    int	    text_area_width;
+    int	    text_area_height;
+
+    // avoid that moving components around generates events
+    ++hold_gui_events;
+
+    text_area_x = 0;
+    if (gui.which_scrollbars[SBAR_LEFT])
+	text_area_x += gui.scrollbar_width;
+
+    text_area_y = 0;
+#if defined(FEAT_MENU) && !(defined(FEAT_GUI_GTK) || defined(FEAT_GUI_PHOTON))
+    gui.menu_width = total_width;
+    if (gui.menu_is_active)
+	text_area_y += gui.menu_height;
+#endif
+#if defined(FEAT_TOOLBAR) && defined(FEAT_GUI_MSWIN)
+    if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
+	text_area_y = TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT;
+#endif
+
+# if defined(FEAT_GUI_TABLINE) && (defined(FEAT_GUI_MSWIN) \
+	|| defined(FEAT_GUI_MOTIF))
+    if (gui_has_tabline())
+	text_area_y += gui.tabline_height;
+#endif
+
+#if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA) \
+	|| defined(FEAT_GUI_HAIKU))
+    if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
+    {
+# if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_HAIKU)
+	gui_mch_set_toolbar_pos(0, text_area_y,
+				gui.menu_width, gui.toolbar_height);
+# endif
+	text_area_y += gui.toolbar_height;
+    }
+#endif
+
+# if defined(FEAT_GUI_TABLINE) && defined(FEAT_GUI_HAIKU)
+    gui_mch_set_tabline_pos(0, text_area_y,
+    gui.menu_width, gui.tabline_height);
+    if (gui_has_tabline())
+	text_area_y += gui.tabline_height;
+#endif
+
+    text_area_width = gui.num_cols * gui.char_width + gui.border_offset * 2;
+    text_area_height = gui.num_rows * gui.char_height + gui.border_offset * 2;
+
+    gui_mch_set_text_area_pos(text_area_x,
+			      text_area_y,
+			      text_area_width,
+			      text_area_height
+#if defined(FEAT_XIM) && !defined(FEAT_GUI_GTK)
+				  + xim_get_status_area_height()
+#endif
+			      );
+#ifdef FEAT_MENU
+    gui_position_menu();
+#endif
+    if (gui.which_scrollbars[SBAR_BOTTOM])
+	gui_mch_set_scrollbar_pos(&gui.bottom_sbar,
+				  text_area_x,
+				  text_area_y + text_area_height
+					+ gui_mch_get_scrollbar_ypadding(),
+				  text_area_width,
+				  gui.scrollbar_height);
+    gui.left_sbar_x = 0;
+    gui.right_sbar_x = text_area_x + text_area_width
+					+ gui_mch_get_scrollbar_xpadding();
+
+    --hold_gui_events;
+}
+
+/*
+ * Get the width of the widgets and decorations to the side of the text area.
+ */
+    int
+gui_get_base_width(void)
+{
+    int	    base_width;
+
+    base_width = 2 * gui.border_offset;
+    if (gui.which_scrollbars[SBAR_LEFT])
+	base_width += gui.scrollbar_width;
+    if (gui.which_scrollbars[SBAR_RIGHT])
+	base_width += gui.scrollbar_width;
+    return base_width;
+}
+
+/*
+ * Get the height of the widgets and decorations above and below the text area.
+ */
+    int
+gui_get_base_height(void)
+{
+    int	    base_height;
+
+    base_height = 2 * gui.border_offset;
+    if (gui.which_scrollbars[SBAR_BOTTOM])
+	base_height += gui.scrollbar_height;
+#ifdef FEAT_GUI_GTK
+    // We can't take the sizes properly into account until anything is
+    // realized.  Therefore we recalculate all the values here just before
+    // setting the size. (--mdcki)
+#else
+# ifdef FEAT_MENU
+    if (gui.menu_is_active)
+	base_height += gui.menu_height;
+# endif
+# ifdef FEAT_TOOLBAR
+    if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
+#  if defined(FEAT_GUI_MSWIN) && defined(FEAT_TOOLBAR)
+	base_height += (TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT);
+#  else
+	base_height += gui.toolbar_height;
+#  endif
+# endif
+# if defined(FEAT_GUI_TABLINE) && (defined(FEAT_GUI_MSWIN) \
+	|| defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_HAIKU))
+    if (gui_has_tabline())
+	base_height += gui.tabline_height;
+# endif
+# ifdef FEAT_FOOTER
+    if (vim_strchr(p_go, GO_FOOTER) != NULL)
+	base_height += gui.footer_height;
+# endif
+# if defined(FEAT_GUI_MOTIF) && defined(FEAT_MENU)
+    base_height += gui_mch_text_area_extra_height();
+# endif
+#endif
+    return base_height;
+}
+
+/*
+ * Should be called after the GUI shell has been resized.  Its arguments are
+ * the new width and height of the shell in pixels.
+ */
+    void
+gui_resize_shell(int pixel_width, int pixel_height)
+{
+    static int	busy = FALSE;
+
+    if (!gui.shell_created)	    // ignore when still initializing
+	return;
+
+    /*
+     * Can't resize the screen while it is being redrawn.  Remember the new
+     * size and handle it later.
+     */
+    if (updating_screen || busy)
+    {
+	new_pixel_width = pixel_width;
+	new_pixel_height = pixel_height;
+	return;
+    }
+
+again:
+    new_pixel_width = 0;
+    new_pixel_height = 0;
+    busy = TRUE;
+
+#ifdef FEAT_GUI_HAIKU
+    vim_lock_screen();
+#endif
+
+    // Flush pending output before redrawing
+    out_flush();
+
+    gui.num_cols = (pixel_width - gui_get_base_width()) / gui.char_width;
+    gui.num_rows = (pixel_height - gui_get_base_height()) / gui.char_height;
+
+    gui_position_components(pixel_width);
+    gui_reset_scroll_region();
+
+    /*
+     * At the "more" and ":confirm" prompt there is no redraw, put the cursor
+     * at the last line here (why does it have to be one row too low?).
+     */
+    if (State == ASKMORE || State == CONFIRM)
+	gui.row = gui.num_rows;
+
+    // Only comparing Rows and Columns may be sufficient, but let's stay on
+    // the safe side.
+    if (gui.num_rows != screen_Rows || gui.num_cols != screen_Columns
+	    || gui.num_rows != Rows || gui.num_cols != Columns)
+	shell_resized();
+
+#ifdef FEAT_GUI_HAIKU
+    vim_unlock_screen();
+#endif
+
+    gui_update_scrollbars(TRUE);
+    gui_update_cursor(FALSE, TRUE);
+#if defined(FEAT_XIM) && !defined(FEAT_GUI_GTK)
+    xim_set_status_area();
+#endif
+
+    busy = FALSE;
+
+    // We may have been called again while redrawing the screen.
+    // Need to do it all again with the latest size then.  But only if the size
+    // actually changed.
+    if (new_pixel_height)
+    {
+	if (pixel_width == new_pixel_width && pixel_height == new_pixel_height)
+	{
+	    new_pixel_width = 0;
+	    new_pixel_height = 0;
+	}
+	else
+	{
+	    pixel_width = new_pixel_width;
+	    pixel_height = new_pixel_height;
+	    goto again;
+	}
+    }
+}
+
+/*
+ * Check if gui_resize_shell() must be called.
+ */
+    void
+gui_may_resize_shell(void)
+{
+    if (new_pixel_height)
+	// careful: gui_resize_shell() may postpone the resize again if we
+	// were called indirectly by it
+	gui_resize_shell(new_pixel_width, new_pixel_height);
+}
+
+    int
+gui_get_shellsize(void)
+{
+    Rows = gui.num_rows;
+    Columns = gui.num_cols;
+    return OK;
+}
+
+/*
+ * Set the size of the Vim shell according to Rows and Columns.
+ * If "fit_to_display" is TRUE then the size may be reduced to fit the window
+ * on the screen.
+ * When "mustset" is TRUE the size was set by the user. When FALSE a UI
+ * component was added or removed (e.g., a scrollbar).
+ */
+    void
+gui_set_shellsize(
+    int		mustset UNUSED,
+    int		fit_to_display,
+    int		direction)		// RESIZE_HOR, RESIZE_VER
+{
+    int		base_width;
+    int		base_height;
+    int		width;
+    int		height;
+    int		min_width;
+    int		min_height;
+    int		screen_w;
+    int		screen_h;
+#ifdef FEAT_GUI_GTK
+    int		un_maximize = mustset;
+    int		did_adjust = 0;
+#endif
+    int		x = -1, y = -1;
+
+    if (!gui.shell_created)
+	return;
+
+#if defined(MSWIN) || defined(FEAT_GUI_GTK)
+    // If not setting to a user specified size and maximized, calculate the
+    // number of characters that fit in the maximized window.
+    if (!mustset && (vim_strchr(p_go, GO_KEEPWINSIZE) != NULL
+						       || gui_mch_maximized()))
+    {
+	gui_mch_newfont();
+	return;
+    }
+#endif
+
+    base_width = gui_get_base_width();
+    base_height = gui_get_base_height();
+    if (fit_to_display)
+	// Remember the original window position.
+	(void)gui_mch_get_winpos(&x, &y);
+
+    width = Columns * gui.char_width + base_width;
+    height = Rows * gui.char_height + base_height;
+
+    if (fit_to_display)
+    {
+	gui_mch_get_screen_dimensions(&screen_w, &screen_h);
+	if ((direction & RESIZE_HOR) && width > screen_w)
+	{
+	    Columns = (screen_w - base_width) / gui.char_width;
+	    if (Columns < MIN_COLUMNS)
+		Columns = MIN_COLUMNS;
+	    width = Columns * gui.char_width + base_width;
+#ifdef FEAT_GUI_GTK
+	    ++did_adjust;
+#endif
+	}
+	if ((direction & RESIZE_VERT) && height > screen_h)
+	{
+	    Rows = (screen_h - base_height) / gui.char_height;
+	    check_shellsize();
+	    height = Rows * gui.char_height + base_height;
+#ifdef FEAT_GUI_GTK
+	    ++did_adjust;
+#endif
+	}
+#ifdef FEAT_GUI_GTK
+	if (did_adjust == 2 || (width + gui.char_width >= screen_w
+				     && height + gui.char_height >= screen_h))
+	    // don't unmaximize if at maximum size
+	    un_maximize = FALSE;
+#endif
+    }
+    limit_screen_size();
+    gui.num_cols = Columns;
+    gui.num_rows = Rows;
+
+    min_width = base_width + MIN_COLUMNS * gui.char_width;
+    min_height = base_height + MIN_LINES * gui.char_height;
+    min_height += tabline_height() * gui.char_height;
+
+#ifdef FEAT_GUI_GTK
+    if (un_maximize)
+    {
+	// If the window size is smaller than the screen unmaximize the
+	// window, otherwise resizing won't work.
+	gui_mch_get_screen_dimensions(&screen_w, &screen_h);
+	if ((width + gui.char_width < screen_w
+				   || height + gui.char_height * 2 < screen_h)
+		&& gui_mch_maximized())
+	    gui_mch_unmaximize();
+    }
+#endif
+
+    gui_mch_set_shellsize(width, height, min_width, min_height,
+					  base_width, base_height, direction);
+
+    if (fit_to_display && x >= 0 && y >= 0)
+    {
+	// Some window managers put the Vim window left of/above the screen.
+	// Only change the position if it wasn't already negative before
+	// (happens on MS-Windows with a secondary monitor).
+	gui_mch_update();
+	if (gui_mch_get_winpos(&x, &y) == OK && (x < 0 || y < 0))
+	    gui_mch_set_winpos(x < 0 ? 0 : x, y < 0 ? 0 : y);
+    }
+
+    gui_position_components(width);
+    gui_update_scrollbars(TRUE);
+    gui_reset_scroll_region();
+}
+
+/*
+ * Called when Rows and/or Columns has changed.
+ */
+    void
+gui_new_shellsize(void)
+{
+    gui_reset_scroll_region();
+}
+
+/*
+ * Make scroll region cover whole screen.
+ */
+    static void
+gui_reset_scroll_region(void)
+{
+    gui.scroll_region_top = 0;
+    gui.scroll_region_bot = gui.num_rows - 1;
+    gui.scroll_region_left = 0;
+    gui.scroll_region_right = gui.num_cols - 1;
+}
+
+    static void
+gui_start_highlight(int mask)
+{
+    if (mask > HL_ALL)		    // highlight code
+	gui.highlight_mask = mask;
+    else			    // mask
+	gui.highlight_mask |= mask;
+}
+
+    void
+gui_stop_highlight(int mask)
+{
+    if (mask > HL_ALL)		    // highlight code
+	gui.highlight_mask = HL_NORMAL;
+    else			    // mask
+	gui.highlight_mask &= ~mask;
+}
+
+/*
+ * Clear a rectangular region of the screen from text pos (row1, col1) to
+ * (row2, col2) inclusive.
+ */
+    void
+gui_clear_block(
+    int	    row1,
+    int	    col1,
+    int	    row2,
+    int	    col2)
+{
+    // Clear the selection if we are about to write over it
+    clip_may_clear_selection(row1, row2);
+
+    gui_mch_clear_block(row1, col1, row2, col2);
+
+    // Invalidate cursor if it was in this block
+    if (       gui.cursor_row >= row1 && gui.cursor_row <= row2
+	    && gui.cursor_col >= col1 && gui.cursor_col <= col2)
+	gui.cursor_is_valid = FALSE;
+}
+
+/*
+ * Write code to update the cursor later.  This avoids the need to flush the
+ * output buffer before calling gui_update_cursor().
+ */
+    void
+gui_update_cursor_later(void)
+{
+    OUT_STR(IF_EB("\033|s", ESC_STR "|s"));
+}
+
+    void
+gui_write(
+    char_u	*s,
+    int		len)
+{
+    char_u	*p;
+    int		arg1 = 0, arg2 = 0;
+    int		force_cursor = FALSE;	// force cursor update
+    int		force_scrollbar = FALSE;
+    static win_T	*old_curwin = NULL;
+
+// #define DEBUG_GUI_WRITE
+#ifdef DEBUG_GUI_WRITE
+    {
+	int i;
+	char_u *str;
+
+	printf("gui_write(%d):\n    ", len);
+	for (i = 0; i < len; i++)
+	    if (s[i] == ESC)
+	    {
+		if (i != 0)
+		    printf("\n    ");
+		printf("<ESC>");
+	    }
+	    else
+	    {
+		str = transchar_byte(s[i]);
+		if (str[0] && str[1])
+		    printf("<%s>", (char *)str);
+		else
+		    printf("%s", (char *)str);
+	    }
+	printf("\n");
+    }
+#endif
+    while (len)
+    {
+	if (s[0] == ESC && s[1] == '|')
+	{
+	    p = s + 2;
+	    if (VIM_ISDIGIT(*p) || (*p == '-' && VIM_ISDIGIT(*(p + 1))))
+	    {
+		arg1 = getdigits(&p);
+		if (p > s + len)
+		    break;
+		if (*p == ';')
+		{
+		    ++p;
+		    arg2 = getdigits(&p);
+		    if (p > s + len)
+			break;
+		}
+	    }
+	    switch (*p)
+	    {
+		case 'C':	// Clear screen
+		    clip_scroll_selection(9999);
+		    gui_mch_clear_all();
+		    gui.cursor_is_valid = FALSE;
+		    force_scrollbar = TRUE;
+		    break;
+		case 'M':	// Move cursor
+		    gui_set_cursor(arg1, arg2);
+		    break;
+		case 's':	// force cursor (shape) update
+		    force_cursor = TRUE;
+		    break;
+		case 'R':	// Set scroll region
+		    if (arg1 < arg2)
+		    {
+			gui.scroll_region_top = arg1;
+			gui.scroll_region_bot = arg2;
+		    }
+		    else
+		    {
+			gui.scroll_region_top = arg2;
+			gui.scroll_region_bot = arg1;
+		    }
+		    break;
+		case 'V':	// Set vertical scroll region
+		    if (arg1 < arg2)
+		    {
+			gui.scroll_region_left = arg1;
+			gui.scroll_region_right = arg2;
+		    }
+		    else
+		    {
+			gui.scroll_region_left = arg2;
+			gui.scroll_region_right = arg1;
+		    }
+		    break;
+		case 'd':	// Delete line
+		    gui_delete_lines(gui.row, 1);
+		    break;
+		case 'D':	// Delete lines
+		    gui_delete_lines(gui.row, arg1);
+		    break;
+		case 'i':	// Insert line
+		    gui_insert_lines(gui.row, 1);
+		    break;
+		case 'I':	// Insert lines
+		    gui_insert_lines(gui.row, arg1);
+		    break;
+		case '$':	// Clear to end-of-line
+		    gui_clear_block(gui.row, gui.col, gui.row,
+							    (int)Columns - 1);
+		    break;
+		case 'h':	// Turn on highlighting
+		    gui_start_highlight(arg1);
+		    break;
+		case 'H':	// Turn off highlighting
+		    gui_stop_highlight(arg1);
+		    break;
+		case 'f':	// flash the window (visual bell)
+		    gui_mch_flash(arg1 == 0 ? 20 : arg1);
+		    break;
+		default:
+		    p = s + 1;	// Skip the ESC
+		    break;
+	    }
+	    len -= (int)(++p - s);
+	    s = p;
+	}
+	else if (
+#ifdef EBCDIC
+		CtrlChar(s[0]) != 0	// Ctrl character
+#else
+		s[0] < 0x20		// Ctrl character
+#endif
+#ifdef FEAT_SIGN_ICONS
+		&& s[0] != SIGN_BYTE
+# ifdef FEAT_NETBEANS_INTG
+		&& s[0] != MULTISIGN_BYTE
+# endif
+#endif
+		)
+	{
+	    if (s[0] == '\n')		// NL
+	    {
+		gui.col = 0;
+		if (gui.row < gui.scroll_region_bot)
+		    gui.row++;
+		else
+		    gui_delete_lines(gui.scroll_region_top, 1);
+	    }
+	    else if (s[0] == '\r')	// CR
+	    {
+		gui.col = 0;
+	    }
+	    else if (s[0] == '\b')	// Backspace
+	    {
+		if (gui.col)
+		    --gui.col;
+	    }
+	    else if (s[0] == Ctrl_L)	// cursor-right
+	    {
+		++gui.col;
+	    }
+	    else if (s[0] == Ctrl_G)	// Beep
+	    {
+		gui_mch_beep();
+	    }
+	    // Other Ctrl character: shouldn't happen!
+
+	    --len;	// Skip this char
+	    ++s;
+	}
+	else
+	{
+	    p = s;
+	    while (len > 0 && (
+#ifdef EBCDIC
+			CtrlChar(*p) == 0
+#else
+			*p >= 0x20
+#endif
+#ifdef FEAT_SIGN_ICONS
+			|| *p == SIGN_BYTE
+# ifdef FEAT_NETBEANS_INTG
+			|| *p == MULTISIGN_BYTE
+# endif
+#endif
+			))
+	    {
+		len--;
+		p++;
+	    }
+	    gui_outstr(s, (int)(p - s));
+	    s = p;
+	}
+    }
+
+    // Postponed update of the cursor (won't work if "can_update_cursor" isn't
+    // set).
+    if (force_cursor)
+	gui_update_cursor(TRUE, TRUE);
+
+    // When switching to another window the dragging must have stopped.
+    // Required for GTK, dragged_sb isn't reset.
+    if (old_curwin != curwin)
+	gui.dragged_sb = SBAR_NONE;
+
+    // Update the scrollbars after clearing the screen or when switched
+    // to another window.
+    // Update the horizontal scrollbar always, it's difficult to check all
+    // situations where it might change.
+    if (force_scrollbar || old_curwin != curwin)
+	gui_update_scrollbars(force_scrollbar);
+    else
+	gui_update_horiz_scrollbar(FALSE);
+    old_curwin = curwin;
+
+    /*
+     * We need to make sure this is cleared since Athena doesn't tell us when
+     * he is done dragging.  Do the same for GTK.
+     */
+#if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_GTK)
+    gui.dragged_sb = SBAR_NONE;
+#endif
+
+    gui_may_flush();		    // In case vim decides to take a nap
+}
+
+/*
+ * When ScreenLines[] is invalid, updating the cursor should not be done, it
+ * produces wrong results.  Call gui_dont_update_cursor() before that code and
+ * gui_can_update_cursor() afterwards.
+ */
+    void
+gui_dont_update_cursor(int undraw)
+{
+    if (gui.in_use)
+    {
+	// Undraw the cursor now, we probably can't do it after the change.
+	if (undraw)
+	    gui_undraw_cursor();
+	can_update_cursor = FALSE;
+    }
+}
+
+    void
+gui_can_update_cursor(void)
+{
+    can_update_cursor = TRUE;
+    // No need to update the cursor right now, there is always more output
+    // after scrolling.
+}
+
+/*
+ * Disable issuing gui_mch_flush().
+ */
+    void
+gui_disable_flush(void)
+{
+    ++disable_flush;
+}
+
+/*
+ * Enable issuing gui_mch_flush().
+ */
+    void
+gui_enable_flush(void)
+{
+    --disable_flush;
+}
+
+/*
+ * Issue gui_mch_flush() if it is not disabled.
+ */
+    void
+gui_may_flush(void)
+{
+    if (disable_flush == 0)
+	gui_mch_flush();
+}
+
+    static void
+gui_outstr(char_u *s, int len)
+{
+    int	    this_len;
+    int	    cells;
+
+    if (len == 0)
+	return;
+
+    if (len < 0)
+	len = (int)STRLEN(s);
+
+    while (len > 0)
+    {
+	if (has_mbyte)
+	{
+	    // Find out how many chars fit in the current line.
+	    cells = 0;
+	    for (this_len = 0; this_len < len; )
+	    {
+		cells += (*mb_ptr2cells)(s + this_len);
+		if (gui.col + cells > Columns)
+		    break;
+		this_len += (*mb_ptr2len)(s + this_len);
+	    }
+	    if (this_len > len)
+		this_len = len;	    // don't include following composing char
+	}
+	else
+	    if (gui.col + len > Columns)
+	    this_len = Columns - gui.col;
+	else
+	    this_len = len;
+
+	(void)gui_outstr_nowrap(s, this_len,
+					  0, (guicolor_T)0, (guicolor_T)0, 0);
+	s += this_len;
+	len -= this_len;
+	// fill up for a double-width char that doesn't fit.
+	if (len > 0 && gui.col < Columns)
+	    (void)gui_outstr_nowrap((char_u *)" ", 1,
+					  0, (guicolor_T)0, (guicolor_T)0, 0);
+	// The cursor may wrap to the next line.
+	if (gui.col >= Columns)
+	{
+	    gui.col = 0;
+	    gui.row++;
+	}
+    }
+}
+
+/*
+ * Output one character (may be one or two display cells).
+ * Caller must check for valid "off".
+ * Returns FAIL or OK, just like gui_outstr_nowrap().
+ */
+    static int
+gui_screenchar(
+    int		off,	    // Offset from start of screen
+    int		flags,
+    guicolor_T	fg,	    // colors for cursor
+    guicolor_T	bg,	    // colors for cursor
+    int		back)	    // backup this many chars when using bold trick
+{
+    char_u	buf[MB_MAXBYTES + 1];
+
+    // Don't draw right halve of a double-width UTF-8 char. "cannot happen"
+    if (enc_utf8 && ScreenLines[off] == 0)
+	return OK;
+
+    if (enc_utf8 && ScreenLinesUC[off] != 0)
+	// Draw UTF-8 multi-byte character.
+	return gui_outstr_nowrap(buf, utfc_char2bytes(off, buf),
+							 flags, fg, bg, back);
+
+    if (enc_dbcs == DBCS_JPNU && ScreenLines[off] == 0x8e)
+    {
+	buf[0] = ScreenLines[off];
+	buf[1] = ScreenLines2[off];
+	return gui_outstr_nowrap(buf, 2, flags, fg, bg, back);
+    }
+
+    // Draw non-multi-byte character or DBCS character.
+    return gui_outstr_nowrap(ScreenLines + off,
+	    enc_dbcs ? (*mb_ptr2len)(ScreenLines + off) : 1,
+							 flags, fg, bg, back);
+}
+
+#ifdef FEAT_GUI_GTK
+/*
+ * Output the string at the given screen position.  This is used in place
+ * of gui_screenchar() where possible because Pango needs as much context
+ * as possible to work nicely.  It's a lot faster as well.
+ */
+    static int
+gui_screenstr(
+    int		off,	    // Offset from start of screen
+    int		len,	    // string length in screen cells
+    int		flags,
+    guicolor_T	fg,	    // colors for cursor
+    guicolor_T	bg,	    // colors for cursor
+    int		back)	    // backup this many chars when using bold trick
+{
+    char_u  *buf;
+    int	    outlen = 0;
+    int	    i;
+    int	    retval;
+
+    if (len <= 0) // "cannot happen"?
+	return OK;
+
+    if (enc_utf8)
+    {
+	buf = alloc(len * MB_MAXBYTES + 1);
+	if (buf == NULL)
+	    return OK; // not much we could do here...
+
+	for (i = off; i < off + len; ++i)
+	{
+	    if (ScreenLines[i] == 0)
+		continue; // skip second half of double-width char
+
+	    if (ScreenLinesUC[i] == 0)
+		buf[outlen++] = ScreenLines[i];
+	    else
+		outlen += utfc_char2bytes(i, buf + outlen);
+	}
+
+	buf[outlen] = NUL; // only to aid debugging
+	retval = gui_outstr_nowrap(buf, outlen, flags, fg, bg, back);
+	vim_free(buf);
+
+	return retval;
+    }
+    else if (enc_dbcs == DBCS_JPNU)
+    {
+	buf = alloc(len * 2 + 1);
+	if (buf == NULL)
+	    return OK; // not much we could do here...
+
+	for (i = off; i < off + len; ++i)
+	{
+	    buf[outlen++] = ScreenLines[i];
+
+	    // handle double-byte single-width char
+	    if (ScreenLines[i] == 0x8e)
+		buf[outlen++] = ScreenLines2[i];
+	    else if (MB_BYTE2LEN(ScreenLines[i]) == 2)
+		buf[outlen++] = ScreenLines[++i];
+	}
+
+	buf[outlen] = NUL; // only to aid debugging
+	retval = gui_outstr_nowrap(buf, outlen, flags, fg, bg, back);
+	vim_free(buf);
+
+	return retval;
+    }
+    else
+    {
+	return gui_outstr_nowrap(&ScreenLines[off], len,
+				 flags, fg, bg, back);
+    }
+}
+#endif // FEAT_GUI_GTK
+
+/*
+ * Output the given string at the current cursor position.  If the string is
+ * too long to fit on the line, then it is truncated.
+ * "flags":
+ * GUI_MON_IS_CURSOR should only be used when this function is being called to
+ * actually draw (an inverted) cursor.
+ * GUI_MON_TRS_CURSOR is used to draw the cursor text with a transparent
+ * background.
+ * GUI_MON_NOCLEAR is used to avoid clearing the selection when drawing over
+ * it.
+ * Returns OK, unless "back" is non-zero and using the bold trick, then return
+ * FAIL (the caller should start drawing "back" chars back).
+ */
+    static int
+gui_outstr_nowrap(
+    char_u	*s,
+    int		len,
+    int		flags,
+    guicolor_T	fg,	    // colors for cursor
+    guicolor_T	bg,	    // colors for cursor
+    int		back)	    // backup this many chars when using bold trick
+{
+    long_u	highlight_mask;
+    long_u	hl_mask_todo;
+    guicolor_T	fg_color;
+    guicolor_T	bg_color;
+    guicolor_T	sp_color;
+#if !defined(FEAT_GUI_GTK)
+    GuiFont	font = NOFONT;
+    GuiFont	wide_font = NOFONT;
+# ifdef FEAT_XFONTSET
+    GuiFontset	fontset = NOFONTSET;
+# endif
+#endif
+    attrentry_T	*aep = NULL;
+    int		draw_flags;
+    int		col = gui.col;
+#ifdef FEAT_SIGN_ICONS
+    int		draw_sign = FALSE;
+    int		signcol = 0;
+    char_u	extra[18];
+# ifdef FEAT_NETBEANS_INTG
+    int		multi_sign = FALSE;
+# endif
+#endif
+
+    if (len < 0)
+	len = (int)STRLEN(s);
+    if (len == 0)
+	return OK;
+
+#ifdef FEAT_SIGN_ICONS
+    if (*s == SIGN_BYTE
+# ifdef FEAT_NETBEANS_INTG
+	  || *s == MULTISIGN_BYTE
+# endif
+       )
+    {
+# ifdef FEAT_NETBEANS_INTG
+	if (*s == MULTISIGN_BYTE)
+	    multi_sign = TRUE;
+# endif
+	// draw spaces instead
+	if (*curwin->w_p_scl == 'n' && *(curwin->w_p_scl + 1) == 'u' &&
+		(curwin->w_p_nu || curwin->w_p_rnu))
+	{
+	    sprintf((char *)extra, "%*c ", number_width(curwin), ' ');
+	    s = extra;
+	}
+	else
+	    s = (char_u *)"  ";
+	if (len == 1 && col > 0)
+	    --col;
+	len = (int)STRLEN(s);
+	if (len > 2)
+	    // right align sign icon in the number column
+	    signcol = col + len - 3;
+	else
+	    signcol = col;
+	draw_sign = TRUE;
+	highlight_mask = 0;
+    }
+    else
+#endif
+    if (gui.highlight_mask > HL_ALL)
+    {
+	aep = syn_gui_attr2entry(gui.highlight_mask);
+	if (aep == NULL)	    // highlighting not set
+	    highlight_mask = 0;
+	else
+	    highlight_mask = aep->ae_attr;
+    }
+    else
+	highlight_mask = gui.highlight_mask;
+    hl_mask_todo = highlight_mask;
+
+#if !defined(FEAT_GUI_GTK)
+    // Set the font
+    if (aep != NULL && aep->ae_u.gui.font != NOFONT)
+	font = aep->ae_u.gui.font;
+# ifdef FEAT_XFONTSET
+    else if (aep != NULL && aep->ae_u.gui.fontset != NOFONTSET)
+	fontset = aep->ae_u.gui.fontset;
+# endif
+    else
+    {
+# ifdef FEAT_XFONTSET
+	if (gui.fontset != NOFONTSET)
+	    fontset = gui.fontset;
+	else
+# endif
+	    if (hl_mask_todo & (HL_BOLD | HL_STANDOUT))
+	{
+	    if ((hl_mask_todo & HL_ITALIC) && gui.boldital_font != NOFONT)
+	    {
+		font = gui.boldital_font;
+		hl_mask_todo &= ~(HL_BOLD | HL_STANDOUT | HL_ITALIC);
+	    }
+	    else if (gui.bold_font != NOFONT)
+	    {
+		font = gui.bold_font;
+		hl_mask_todo &= ~(HL_BOLD | HL_STANDOUT);
+	    }
+	    else
+		font = gui.norm_font;
+	}
+	else if ((hl_mask_todo & HL_ITALIC) && gui.ital_font != NOFONT)
+	{
+	    font = gui.ital_font;
+	    hl_mask_todo &= ~HL_ITALIC;
+	}
+	else
+	    font = gui.norm_font;
+
+	/*
+	 * Choose correct wide_font by font.  wide_font should be set with font
+	 * at same time in above block.  But it will make many "ifdef" nasty
+	 * blocks.  So we do it here.
+	 */
+	if (font == gui.boldital_font && gui.wide_boldital_font)
+	    wide_font = gui.wide_boldital_font;
+	else if (font == gui.bold_font && gui.wide_bold_font)
+	    wide_font = gui.wide_bold_font;
+	else if (font == gui.ital_font && gui.wide_ital_font)
+	    wide_font = gui.wide_ital_font;
+	else if (font == gui.norm_font && gui.wide_font)
+	    wide_font = gui.wide_font;
+    }
+# ifdef FEAT_XFONTSET
+    if (fontset != NOFONTSET)
+	gui_mch_set_fontset(fontset);
+    else
+# endif
+	gui_mch_set_font(font);
+#endif
+
+    draw_flags = 0;
+
+    // Set the color
+    bg_color = gui.back_pixel;
+    if ((flags & GUI_MON_IS_CURSOR) && gui.in_focus)
+    {
+	draw_flags |= DRAW_CURSOR;
+	fg_color = fg;
+	bg_color = bg;
+	sp_color = fg;
+    }
+    else if (aep != NULL)
+    {
+	fg_color = aep->ae_u.gui.fg_color;
+	if (fg_color == INVALCOLOR)
+	    fg_color = gui.norm_pixel;
+	bg_color = aep->ae_u.gui.bg_color;
+	if (bg_color == INVALCOLOR)
+	    bg_color = gui.back_pixel;
+	sp_color = aep->ae_u.gui.sp_color;
+	if (sp_color == INVALCOLOR)
+	    sp_color = fg_color;
+    }
+    else
+    {
+	fg_color = gui.norm_pixel;
+	sp_color = fg_color;
+    }
+
+    if (highlight_mask & (HL_INVERSE | HL_STANDOUT))
+    {
+	gui_mch_set_fg_color(bg_color);
+	gui_mch_set_bg_color(fg_color);
+    }
+    else
+    {
+	gui_mch_set_fg_color(fg_color);
+	gui_mch_set_bg_color(bg_color);
+    }
+    gui_mch_set_sp_color(sp_color);
+
+    // Clear the selection if we are about to write over it
+    if (!(flags & GUI_MON_NOCLEAR))
+	clip_may_clear_selection(gui.row, gui.row);
+
+
+    // If there's no bold font, then fake it
+    if (hl_mask_todo & (HL_BOLD | HL_STANDOUT))
+	draw_flags |= DRAW_BOLD;
+
+    /*
+     * When drawing bold or italic characters the spill-over from the left
+     * neighbor may be destroyed.  Let the caller backup to start redrawing
+     * just after a blank.
+     */
+    if (back != 0 && ((draw_flags & DRAW_BOLD) || (highlight_mask & HL_ITALIC)))
+	return FAIL;
+
+#if defined(FEAT_GUI_GTK)
+    // If there's no italic font, then fake it.
+    // For GTK2, we don't need a different font for italic style.
+    if (hl_mask_todo & HL_ITALIC)
+	draw_flags |= DRAW_ITALIC;
+
+    // Do we underline the text?
+    if (hl_mask_todo & HL_UNDERLINE)
+	draw_flags |= DRAW_UNDERL;
+
+#else
+    // Do we underline the text?
+    if ((hl_mask_todo & HL_UNDERLINE) || (hl_mask_todo & HL_ITALIC))
+	draw_flags |= DRAW_UNDERL;
+#endif
+    // Do we undercurl the text?
+    if (hl_mask_todo & HL_UNDERCURL)
+	draw_flags |= DRAW_UNDERC;
+
+    // Do we strikethrough the text?
+    if (hl_mask_todo & HL_STRIKETHROUGH)
+	draw_flags |= DRAW_STRIKE;
+
+    // Do we draw transparently?
+    if (flags & GUI_MON_TRS_CURSOR)
+	draw_flags |= DRAW_TRANSP;
+
+    /*
+     * Draw the text.
+     */
+#ifdef FEAT_GUI_GTK
+    // The value returned is the length in display cells
+    len = gui_gtk2_draw_string(gui.row, col, s, len, draw_flags);
+#else
+    if (enc_utf8)
+    {
+	int	start;		// index of bytes to be drawn
+	int	cells;		// cellwidth of bytes to be drawn
+	int	thislen;	// length of bytes to be drawn
+	int	cn;		// cellwidth of current char
+	int	i;		// index of current char
+	int	c;		// current char value
+	int	cl;		// byte length of current char
+	int	comping;	// current char is composing
+	int	scol = col;	// screen column
+	int	curr_wide = FALSE;  // use 'guifontwide'
+	int	prev_wide = FALSE;
+	int	wide_changed;
+# ifdef MSWIN
+	int	sep_comp = FALSE;   // Don't separate composing chars.
+# else
+	int	sep_comp = TRUE;    // Separate composing chars.
+# endif
+
+	// Break the string at a composing character, it has to be drawn on
+	// top of the previous character.
+	start = 0;
+	cells = 0;
+	for (i = 0; i < len; i += cl)
+	{
+	    c = utf_ptr2char(s + i);
+	    cn = utf_char2cells(c);
+	    comping = utf_iscomposing(c);
+	    if (!comping)	// count cells from non-composing chars
+		cells += cn;
+	    if (!comping || sep_comp)
+	    {
+		if (cn > 1
+# ifdef FEAT_XFONTSET
+			&& fontset == NOFONTSET
+# endif
+			&& wide_font != NOFONT)
+		    curr_wide = TRUE;
+		else
+		    curr_wide = FALSE;
+	    }
+	    cl = utf_ptr2len(s + i);
+	    if (cl == 0)	// hit end of string
+		len = i + cl;	// len must be wrong "cannot happen"
+
+	    wide_changed = curr_wide != prev_wide;
+
+	    // Print the string so far if it's the last character or there is
+	    // a composing character.
+	    if (i + cl >= len || (comping && sep_comp && i > start)
+		    || wide_changed
+# if defined(FEAT_GUI_X11)
+		    || (cn > 1
+#  ifdef FEAT_XFONTSET
+			// No fontset: At least draw char after wide char at
+			// right position.
+			&& fontset == NOFONTSET
+#  endif
+		       )
+# endif
+	       )
+	    {
+		if ((comping && sep_comp) || wide_changed)
+		    thislen = i - start;
+		else
+		    thislen = i - start + cl;
+		if (thislen > 0)
+		{
+		    if (prev_wide)
+			gui_mch_set_font(wide_font);
+		    gui_mch_draw_string(gui.row, scol, s + start, thislen,
+								  draw_flags);
+		    if (prev_wide)
+			gui_mch_set_font(font);
+		    start += thislen;
+		}
+		scol += cells;
+		cells = 0;
+		// Adjust to not draw a character which width is changed
+		// against with last one.
+		if (wide_changed && !(comping && sep_comp))
+		{
+		    scol -= cn;
+		    cl = 0;
+		}
+
+# if defined(FEAT_GUI_X11)
+		// No fontset: draw a space to fill the gap after a wide char
+		//
+		if (cn > 1 && (draw_flags & DRAW_TRANSP) == 0
+#  ifdef FEAT_XFONTSET
+			&& fontset == NOFONTSET
+#  endif
+			&& !wide_changed)
+		    gui_mch_draw_string(gui.row, scol - 1, (char_u *)" ",
+							       1, draw_flags);
+# endif
+	    }
+	    // Draw a composing char on top of the previous char.
+	    if (comping && sep_comp)
+	    {
+# if defined(__APPLE_CC__) && TARGET_API_MAC_CARBON
+		// Carbon ATSUI autodraws composing char over previous char
+		gui_mch_draw_string(gui.row, scol, s + i, cl,
+						    draw_flags | DRAW_TRANSP);
+# else
+		gui_mch_draw_string(gui.row, scol - cn, s + i, cl,
+						    draw_flags | DRAW_TRANSP);
+# endif
+		start = i + cl;
+	    }
+	    prev_wide = curr_wide;
+	}
+	// The stuff below assumes "len" is the length in screen columns.
+	len = scol - col;
+    }
+    else
+    {
+	gui_mch_draw_string(gui.row, col, s, len, draw_flags);
+	if (enc_dbcs == DBCS_JPNU)
+	{
+	    // Get the length in display cells, this can be different from the
+	    // number of bytes for "euc-jp".
+	    len = mb_string2cells(s, len);
+	}
+    }
+#endif // !FEAT_GUI_GTK
+
+    if (!(flags & (GUI_MON_IS_CURSOR | GUI_MON_TRS_CURSOR)))
+	gui.col = col + len;
+
+    // May need to invert it when it's part of the selection.
+    if (flags & GUI_MON_NOCLEAR)
+	clip_may_redraw_selection(gui.row, col, len);
+
+    if (!(flags & (GUI_MON_IS_CURSOR | GUI_MON_TRS_CURSOR)))
+    {
+	// Invalidate the old physical cursor position if we wrote over it
+	if (gui.cursor_row == gui.row
+		&& gui.cursor_col >= col
+		&& gui.cursor_col < col + len)
+	    gui.cursor_is_valid = FALSE;
+    }
+
+#ifdef FEAT_SIGN_ICONS
+    if (draw_sign)
+	// Draw the sign on top of the spaces.
+	gui_mch_drawsign(gui.row, signcol, gui.highlight_mask);
+# if defined(FEAT_NETBEANS_INTG) && (defined(FEAT_GUI_X11) \
+	|| defined(FEAT_GUI_GTK) || defined(FEAT_GUI_MSWIN))
+    if (multi_sign)
+	netbeans_draw_multisign_indicator(gui.row);
+# endif
+#endif
+
+    return OK;
+}
+
+/*
+ * Un-draw the cursor.	Actually this just redraws the character at the given
+ * position.
+ */
+    void
+gui_undraw_cursor(void)
+{
+    if (gui.cursor_is_valid)
+    {
+	// Redraw the character just before too, if there is one, because with
+	// some fonts and characters there can be a one pixel overlap.
+	gui_redraw_block(gui.cursor_row,
+		      gui.cursor_col > 0 ? gui.cursor_col - 1 : gui.cursor_col,
+		      gui.cursor_row, gui.cursor_col, GUI_MON_NOCLEAR);
+
+	// Cursor_is_valid is reset when the cursor is undrawn, also reset it
+	// here in case it wasn't needed to undraw it.
+	gui.cursor_is_valid = FALSE;
+    }
+}
+
+    void
+gui_redraw(
+    int		x,
+    int		y,
+    int		w,
+    int		h)
+{
+    int		row1, col1, row2, col2;
+
+    row1 = Y_2_ROW(y);
+    col1 = X_2_COL(x);
+    row2 = Y_2_ROW(y + h - 1);
+    col2 = X_2_COL(x + w - 1);
+
+    gui_redraw_block(row1, col1, row2, col2, GUI_MON_NOCLEAR);
+
+    /*
+     * We may need to redraw the cursor, but don't take it upon us to change
+     * its location after a scroll.
+     * (maybe be more strict even and test col too?)
+     * These things may be outside the update/clipping region and reality may
+     * not reflect Vims internal ideas if these operations are clipped away.
+     */
+    if (gui.row == gui.cursor_row)
+	gui_update_cursor(TRUE, TRUE);
+}
+
+/*
+ * Draw a rectangular block of characters, from row1 to row2 (inclusive) and
+ * from col1 to col2 (inclusive).
+ */
+    void
+gui_redraw_block(
+    int		row1,
+    int		col1,
+    int		row2,
+    int		col2,
+    int		flags)	// flags for gui_outstr_nowrap()
+{
+    int		old_row, old_col;
+    long_u	old_hl_mask;
+    int		off;
+    sattr_T	first_attr;
+    int		idx, len;
+    int		back, nback;
+    int		orig_col1, orig_col2;
+
+    // Don't try to update when ScreenLines is not valid
+    if (!screen_cleared || ScreenLines == NULL)
+	return;
+
+    // Don't try to draw outside the shell!
+    // Check everything, strange values may be caused by a big border width
+    col1 = check_col(col1);
+    col2 = check_col(col2);
+    row1 = check_row(row1);
+    row2 = check_row(row2);
+
+    // Remember where our cursor was
+    old_row = gui.row;
+    old_col = gui.col;
+    old_hl_mask = gui.highlight_mask;
+    orig_col1 = col1;
+    orig_col2 = col2;
+
+    for (gui.row = row1; gui.row <= row2; gui.row++)
+    {
+	// When only half of a double-wide character is in the block, include
+	// the other half.
+	col1 = orig_col1;
+	col2 = orig_col2;
+	off = LineOffset[gui.row];
+	if (enc_dbcs != 0)
+	{
+	    if (col1 > 0)
+		col1 -= dbcs_screen_head_off(ScreenLines + off,
+						    ScreenLines + off + col1);
+	    col2 += dbcs_screen_tail_off(ScreenLines + off,
+						    ScreenLines + off + col2);
+	}
+	else if (enc_utf8)
+	{
+	    if (ScreenLines[off + col1] == 0)
+	    {
+		if (col1 > 0)
+		    --col1;
+		else
+		{
+		    // FIXME: how can the first character ever be zero?
+		    // Make this IEMSGN when it no longer breaks Travis CI.
+		    vim_snprintf((char *)IObuff, IOSIZE,
+			    "INTERNAL ERROR: NUL in ScreenLines in row %ld",
+			    (long)gui.row);
+		    msg((char *)IObuff);
+		}
+	    }
+#ifdef FEAT_GUI_GTK
+	    if (col2 + 1 < Columns && ScreenLines[off + col2 + 1] == 0)
+		++col2;
+#endif
+	}
+	gui.col = col1;
+	off = LineOffset[gui.row] + gui.col;
+	len = col2 - col1 + 1;
+
+	// Find how many chars back this highlighting starts, or where a space
+	// is.  Needed for when the bold trick is used
+	for (back = 0; back < col1; ++back)
+	    if (ScreenAttrs[off - 1 - back] != ScreenAttrs[off]
+		    || ScreenLines[off - 1 - back] == ' ')
+		break;
+
+	// Break it up in strings of characters with the same attributes.
+	// Print UTF-8 characters individually.
+	while (len > 0)
+	{
+	    first_attr = ScreenAttrs[off];
+	    gui.highlight_mask = first_attr;
+#if !defined(FEAT_GUI_GTK)
+	    if (enc_utf8 && ScreenLinesUC[off] != 0)
+	    {
+		// output multi-byte character separately
+		nback = gui_screenchar(off, flags,
+					  (guicolor_T)0, (guicolor_T)0, back);
+		if (gui.col < Columns && ScreenLines[off + 1] == 0)
+		    idx = 2;
+		else
+		    idx = 1;
+	    }
+	    else if (enc_dbcs == DBCS_JPNU && ScreenLines[off] == 0x8e)
+	    {
+		// output double-byte, single-width character separately
+		nback = gui_screenchar(off, flags,
+					  (guicolor_T)0, (guicolor_T)0, back);
+		idx = 1;
+	    }
+	    else
+#endif
+	    {
+#ifdef FEAT_GUI_GTK
+		for (idx = 0; idx < len; ++idx)
+		{
+		    if (enc_utf8 && ScreenLines[off + idx] == 0)
+			continue; // skip second half of double-width char
+		    if (ScreenAttrs[off + idx] != first_attr)
+			break;
+		}
+		// gui_screenstr() takes care of multibyte chars
+		nback = gui_screenstr(off, idx, flags,
+				      (guicolor_T)0, (guicolor_T)0, back);
+#else
+		for (idx = 0; idx < len && ScreenAttrs[off + idx] == first_attr;
+									idx++)
+		{
+		    // Stop at a multi-byte Unicode character.
+		    if (enc_utf8 && ScreenLinesUC[off + idx] != 0)
+			break;
+		    if (enc_dbcs == DBCS_JPNU)
+		    {
+			// Stop at a double-byte single-width char.
+			if (ScreenLines[off + idx] == 0x8e)
+			    break;
+			if (len > 1 && (*mb_ptr2len)(ScreenLines
+							    + off + idx) == 2)
+			    ++idx;  // skip second byte of double-byte char
+		    }
+		}
+		nback = gui_outstr_nowrap(ScreenLines + off, idx, flags,
+					  (guicolor_T)0, (guicolor_T)0, back);
+#endif
+	    }
+	    if (nback == FAIL)
+	    {
+		// Must back up to start drawing where a bold or italic word
+		// starts.
+		off -= back;
+		len += back;
+		gui.col -= back;
+	    }
+	    else
+	    {
+		off += idx;
+		len -= idx;
+	    }
+	    back = 0;
+	}
+    }
+
+    // Put the cursor back where it was
+    gui.row = old_row;
+    gui.col = old_col;
+    gui.highlight_mask = (int)old_hl_mask;
+}
+
+    static void
+gui_delete_lines(int row, int count)
+{
+    if (count <= 0)
+	return;
+
+    if (row + count > gui.scroll_region_bot)
+	// Scrolled out of region, just blank the lines out
+	gui_clear_block(row, gui.scroll_region_left,
+			      gui.scroll_region_bot, gui.scroll_region_right);
+    else
+    {
+	gui_mch_delete_lines(row, count);
+
+	// If the cursor was in the deleted lines it's now gone.  If the
+	// cursor was in the scrolled lines adjust its position.
+	if (gui.cursor_row >= row
+		&& gui.cursor_col >= gui.scroll_region_left
+		&& gui.cursor_col <= gui.scroll_region_right)
+	{
+	    if (gui.cursor_row < row + count)
+		gui.cursor_is_valid = FALSE;
+	    else if (gui.cursor_row <= gui.scroll_region_bot)
+		gui.cursor_row -= count;
+	}
+    }
+}
+
+    static void
+gui_insert_lines(int row, int count)
+{
+    if (count <= 0)
+	return;
+
+    if (row + count > gui.scroll_region_bot)
+	// Scrolled out of region, just blank the lines out
+	gui_clear_block(row, gui.scroll_region_left,
+			      gui.scroll_region_bot, gui.scroll_region_right);
+    else
+    {
+	gui_mch_insert_lines(row, count);
+
+	if (gui.cursor_row >= gui.row
+		&& gui.cursor_col >= gui.scroll_region_left
+		&& gui.cursor_col <= gui.scroll_region_right)
+	{
+	    if (gui.cursor_row <= gui.scroll_region_bot - count)
+		gui.cursor_row += count;
+	    else if (gui.cursor_row <= gui.scroll_region_bot)
+		gui.cursor_is_valid = FALSE;
+	}
+    }
+}
+
+#ifdef FEAT_TIMERS
+/*
+ * Passed to ui_wait_for_chars_or_timer(), ignoring extra arguments.
+ */
+    static int
+gui_wait_for_chars_3(
+    long wtime,
+    int *interrupted UNUSED,
+    int ignore_input UNUSED)
+{
+    return gui_mch_wait_for_chars(wtime);
+}
+#endif
+
+/*
+ * Returns OK if a character was found to be available within the given time,
+ * or FAIL otherwise.
+ */
+    static int
+gui_wait_for_chars_or_timer(
+	long wtime,
+	int *interrupted UNUSED,
+	int ignore_input UNUSED)
+{
+#ifdef FEAT_TIMERS
+    return ui_wait_for_chars_or_timer(wtime, gui_wait_for_chars_3,
+						    interrupted, ignore_input);
+#else
+    return gui_mch_wait_for_chars(wtime);
+#endif
+}
+
+/*
+ * The main GUI input routine.	Waits for a character from the keyboard.
+ * "wtime" == -1    Wait forever.
+ * "wtime" == 0	    Don't wait.
+ * "wtime" > 0	    Wait wtime milliseconds for a character.
+ *
+ * Returns the number of characters read or zero when timed out or interrupted.
+ * "buf" may be NULL, in which case a non-zero number is returned if characters
+ * are available.
+ */
+    static int
+gui_wait_for_chars_buf(
+    char_u	*buf,
+    int		maxlen,
+    long	wtime,	    // don't use "time", MIPS cannot handle it
+    int		tb_change_cnt)
+{
+    int	    retval;
+
+#ifdef FEAT_MENU
+    // If we're going to wait a bit, update the menus and mouse shape for the
+    // current State.
+    if (wtime != 0)
+	gui_update_menus(0);
+#endif
+
+    gui_mch_update();
+    if (input_available())	// Got char, return immediately
+    {
+	if (buf != NULL && !typebuf_changed(tb_change_cnt))
+	    return read_from_input_buf(buf, (long)maxlen);
+	return 0;
+    }
+    if (wtime == 0)		// Don't wait for char
+	return FAIL;
+
+    // Before waiting, flush any output to the screen.
+    gui_mch_flush();
+
+    // Blink while waiting for a character.
+    gui_mch_start_blink();
+
+    // Common function to loop until "wtime" is met, while handling timers and
+    // other callbacks.
+    retval = inchar_loop(buf, maxlen, wtime, tb_change_cnt,
+			 gui_wait_for_chars_or_timer, NULL);
+
+    gui_mch_stop_blink(TRUE);
+
+    return retval;
+}
+
+/*
+ * Wait for a character from the keyboard without actually reading it.
+ * Also deals with timers.
+ * wtime == -1	    Wait forever.
+ * wtime == 0	    Don't wait.
+ * wtime > 0	    Wait wtime milliseconds for a character.
+ * Returns OK if a character was found to be available within the given time,
+ * or FAIL otherwise.
+ */
+    int
+gui_wait_for_chars(long wtime, int tb_change_cnt)
+{
+    return gui_wait_for_chars_buf(NULL, 0, wtime, tb_change_cnt);
+}
+
+/*
+ * Equivalent of mch_inchar() for the GUI.
+ */
+    int
+gui_inchar(
+    char_u  *buf,
+    int	    maxlen,
+    long    wtime,		// milli seconds
+    int	    tb_change_cnt)
+{
+    return gui_wait_for_chars_buf(buf, maxlen, wtime, tb_change_cnt);
+}
+
+/*
+ * Fill p[4] with mouse coordinates encoded for check_termcode().
+ */
+    static void
+fill_mouse_coord(char_u *p, int col, int row)
+{
+    p[0] = (char_u)(col / 128 + ' ' + 1);
+    p[1] = (char_u)(col % 128 + ' ' + 1);
+    p[2] = (char_u)(row / 128 + ' ' + 1);
+    p[3] = (char_u)(row % 128 + ' ' + 1);
+}
+
+/*
+ * Generic mouse support function.  Add a mouse event to the input buffer with
+ * the given properties.
+ *  button	    --- may be any of MOUSE_LEFT, MOUSE_MIDDLE, MOUSE_RIGHT,
+ *			MOUSE_X1, MOUSE_X2
+ *			MOUSE_DRAG, or MOUSE_RELEASE.
+ *			MOUSE_4 and MOUSE_5 are used for vertical scroll wheel,
+ *			MOUSE_6 and MOUSE_7 for horizontal scroll wheel.
+ *  x, y	    --- Coordinates of mouse in pixels.
+ *  repeated_click  --- TRUE if this click comes only a short time after a
+ *			previous click.
+ *  modifiers	    --- Bit field which may be any of the following modifiers
+ *			or'ed together: MOUSE_SHIFT | MOUSE_CTRL | MOUSE_ALT.
+ * This function will ignore drag events where the mouse has not moved to a new
+ * character.
+ */
+    void
+gui_send_mouse_event(
+    int	    button,
+    int	    x,
+    int	    y,
+    int	    repeated_click,
+    int_u   modifiers)
+{
+    static int	    prev_row = 0, prev_col = 0;
+    static int	    prev_button = -1;
+    static int	    num_clicks = 1;
+    char_u	    string[10];
+    enum key_extra  button_char;
+    int		    row, col;
+#ifdef FEAT_CLIPBOARD
+    int		    checkfor;
+    int		    did_clip = FALSE;
+#endif
+
+    /*
+     * Scrolling may happen at any time, also while a selection is present.
+     */
+    switch (button)
+    {
+	case MOUSE_X1:
+	    button_char = KE_X1MOUSE;
+	    goto button_set;
+	case MOUSE_X2:
+	    button_char = KE_X2MOUSE;
+	    goto button_set;
+	case MOUSE_4:
+	    button_char = KE_MOUSEDOWN;
+	    goto button_set;
+	case MOUSE_5:
+	    button_char = KE_MOUSEUP;
+	    goto button_set;
+	case MOUSE_6:
+	    button_char = KE_MOUSELEFT;
+	    goto button_set;
+	case MOUSE_7:
+	    button_char = KE_MOUSERIGHT;
+button_set:
+	    {
+		// Don't put events in the input queue now.
+		if (hold_gui_events)
+		    return;
+
+		string[3] = CSI;
+		string[4] = KS_EXTRA;
+		string[5] = (int)button_char;
+
+		// Pass the pointer coordinates of the scroll event so that we
+		// know which window to scroll.
+		row = gui_xy2colrow(x, y, &col);
+		string[6] = (char_u)(col / 128 + ' ' + 1);
+		string[7] = (char_u)(col % 128 + ' ' + 1);
+		string[8] = (char_u)(row / 128 + ' ' + 1);
+		string[9] = (char_u)(row % 128 + ' ' + 1);
+
+		if (modifiers == 0)
+		    add_to_input_buf(string + 3, 7);
+		else
+		{
+		    string[0] = CSI;
+		    string[1] = KS_MODIFIER;
+		    string[2] = 0;
+		    if (modifiers & MOUSE_SHIFT)
+			string[2] |= MOD_MASK_SHIFT;
+		    if (modifiers & MOUSE_CTRL)
+			string[2] |= MOD_MASK_CTRL;
+		    if (modifiers & MOUSE_ALT)
+			string[2] |= MOD_MASK_ALT;
+		    add_to_input_buf(string, 10);
+		}
+		return;
+	    }
+    }
+
+#ifdef FEAT_CLIPBOARD
+    // If a clipboard selection is in progress, handle it
+    if (clip_star.state == SELECT_IN_PROGRESS)
+    {
+	clip_process_selection(button, X_2_COL(x), Y_2_ROW(y), repeated_click);
+
+	// A release event may still need to be sent if the position is equal.
+	row = gui_xy2colrow(x, y, &col);
+	if (button != MOUSE_RELEASE || row != prev_row || col != prev_col)
+	    return;
+    }
+
+    // Determine which mouse settings to look for based on the current mode
+    switch (get_real_state())
+    {
+	case NORMAL_BUSY:
+	case OP_PENDING:
+# ifdef FEAT_TERMINAL
+	case TERMINAL:
+# endif
+	case NORMAL:		checkfor = MOUSE_NORMAL;	break;
+	case VISUAL:		checkfor = MOUSE_VISUAL;	break;
+	case SELECTMODE:	checkfor = MOUSE_VISUAL;	break;
+	case REPLACE:
+	case REPLACE+LANGMAP:
+	case VREPLACE:
+	case VREPLACE+LANGMAP:
+	case INSERT:
+	case INSERT+LANGMAP:	checkfor = MOUSE_INSERT;	break;
+	case ASKMORE:
+	case HITRETURN:		// At the more- and hit-enter prompt pass the
+				// mouse event for a click on or below the
+				// message line.
+				if (Y_2_ROW(y) >= msg_row)
+				    checkfor = MOUSE_NORMAL;
+				else
+				    checkfor = MOUSE_RETURN;
+				break;
+
+	    /*
+	     * On the command line, use the clipboard selection on all lines
+	     * but the command line.  But not when pasting.
+	     */
+	case CMDLINE:
+	case CMDLINE+LANGMAP:
+	    if (Y_2_ROW(y) < cmdline_row && button != MOUSE_MIDDLE)
+		checkfor = MOUSE_NONE;
+	    else
+		checkfor = MOUSE_COMMAND;
+	    break;
+
+	default:
+	    checkfor = MOUSE_NONE;
+	    break;
+    };
+
+    /*
+     * Allow clipboard selection of text on the command line in "normal"
+     * modes.  Don't do this when dragging the status line, or extending a
+     * Visual selection.
+     */
+    if ((State == NORMAL || State == NORMAL_BUSY || (State & INSERT))
+	    && Y_2_ROW(y) >= topframe->fr_height + firstwin->w_winrow
+	    && button != MOUSE_DRAG
+# ifdef FEAT_MOUSESHAPE
+	    && !drag_status_line
+	    && !drag_sep_line
+# endif
+	    )
+	checkfor = MOUSE_NONE;
+
+    /*
+     * Use modeless selection when holding CTRL and SHIFT pressed.
+     */
+    if ((modifiers & MOUSE_CTRL) && (modifiers & MOUSE_SHIFT))
+	checkfor = MOUSE_NONEF;
+
+    /*
+     * In Ex mode, always use modeless selection.
+     */
+    if (exmode_active)
+	checkfor = MOUSE_NONE;
+
+    /*
+     * If the mouse settings say to not use the mouse, use the modeless
+     * selection.  But if Visual is active, assume that only the Visual area
+     * will be selected.
+     * Exception: On the command line, both the selection is used and a mouse
+     * key is send.
+     */
+    if (!mouse_has(checkfor) || checkfor == MOUSE_COMMAND)
+    {
+	// Don't do modeless selection in Visual mode.
+	if (checkfor != MOUSE_NONEF && VIsual_active && (State & NORMAL))
+	    return;
+
+	/*
+	 * When 'mousemodel' is "popup", shift-left is translated to right.
+	 * But not when also using Ctrl.
+	 */
+	if (mouse_model_popup() && button == MOUSE_LEFT
+		&& (modifiers & MOUSE_SHIFT) && !(modifiers & MOUSE_CTRL))
+	{
+	    button = MOUSE_RIGHT;
+	    modifiers &= ~ MOUSE_SHIFT;
+	}
+
+	// If the selection is done, allow the right button to extend it.
+	// If the selection is cleared, allow the right button to start it
+	// from the cursor position.
+	if (button == MOUSE_RIGHT)
+	{
+	    if (clip_star.state == SELECT_CLEARED)
+	    {
+		if (State & CMDLINE)
+		{
+		    col = msg_col;
+		    row = msg_row;
+		}
+		else
+		{
+		    col = curwin->w_wcol;
+		    row = curwin->w_wrow + W_WINROW(curwin);
+		}
+		clip_start_selection(col, row, FALSE);
+	    }
+	    clip_process_selection(button, X_2_COL(x), Y_2_ROW(y),
+							      repeated_click);
+	    did_clip = TRUE;
+	}
+	// Allow the left button to start the selection
+	else if (button == MOUSE_LEFT)
+	{
+	    clip_start_selection(X_2_COL(x), Y_2_ROW(y), repeated_click);
+	    did_clip = TRUE;
+	}
+
+	// Always allow pasting
+	if (button != MOUSE_MIDDLE)
+	{
+	    if (!mouse_has(checkfor) || button == MOUSE_RELEASE)
+		return;
+	    if (checkfor != MOUSE_COMMAND)
+		button = MOUSE_LEFT;
+	}
+	repeated_click = FALSE;
+    }
+
+    if (clip_star.state != SELECT_CLEARED && !did_clip)
+	clip_clear_selection(&clip_star);
+#endif
+
+    // Don't put events in the input queue now.
+    if (hold_gui_events)
+	return;
+
+    row = gui_xy2colrow(x, y, &col);
+
+    /*
+     * If we are dragging and the mouse hasn't moved far enough to be on a
+     * different character, then don't send an event to vim.
+     */
+    if (button == MOUSE_DRAG)
+    {
+	if (row == prev_row && col == prev_col)
+	    return;
+	// Dragging above the window, set "row" to -1 to cause a scroll.
+	if (y < 0)
+	    row = -1;
+    }
+
+    /*
+     * If topline has changed (window scrolled) since the last click, reset
+     * repeated_click, because we don't want starting Visual mode when
+     * clicking on a different character in the text.
+     */
+    if (curwin->w_topline != gui_prev_topline
+#ifdef FEAT_DIFF
+	    || curwin->w_topfill != gui_prev_topfill
+#endif
+	    )
+	repeated_click = FALSE;
+
+    string[0] = CSI;	// this sequence is recognized by check_termcode()
+    string[1] = KS_MOUSE;
+    string[2] = KE_FILLER;
+    if (button != MOUSE_DRAG && button != MOUSE_RELEASE)
+    {
+	if (repeated_click)
+	{
+	    /*
+	     * Handle multiple clicks.	They only count if the mouse is still
+	     * pointing at the same character.
+	     */
+	    if (button != prev_button || row != prev_row || col != prev_col)
+		num_clicks = 1;
+	    else if (++num_clicks > 4)
+		num_clicks = 1;
+	}
+	else
+	    num_clicks = 1;
+	prev_button = button;
+	gui_prev_topline = curwin->w_topline;
+#ifdef FEAT_DIFF
+	gui_prev_topfill = curwin->w_topfill;
+#endif
+
+	string[3] = (char_u)(button | 0x20);
+	SET_NUM_MOUSE_CLICKS(string[3], num_clicks);
+    }
+    else
+	string[3] = (char_u)button;
+
+    string[3] |= modifiers;
+    fill_mouse_coord(string + 4, col, row);
+    add_to_input_buf(string, 8);
+
+    if (row < 0)
+	prev_row = 0;
+    else
+	prev_row = row;
+    prev_col = col;
+
+    /*
+     * We need to make sure this is cleared since Athena doesn't tell us when
+     * he is done dragging.  Neither does GTK+ 2 -- at least for now.
+     */
+#if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_GTK)
+    gui.dragged_sb = SBAR_NONE;
+#endif
+}
+
+/*
+ * Convert x and y coordinate to column and row in text window.
+ * Corrects for multi-byte character.
+ * returns column in "*colp" and row as return value;
+ */
+    static int
+gui_xy2colrow(int x, int y, int *colp)
+{
+    int		col = check_col(X_2_COL(x));
+    int		row = check_row(Y_2_ROW(y));
+
+    *colp = mb_fix_col(col, row);
+    return row;
+}
+
+#if defined(FEAT_MENU) || defined(PROTO)
+/*
+ * Callback function for when a menu entry has been selected.
+ */
+    void
+gui_menu_cb(vimmenu_T *menu)
+{
+    char_u  bytes[sizeof(long_u)];
+
+    // Don't put events in the input queue now.
+    if (hold_gui_events)
+	return;
+
+    bytes[0] = CSI;
+    bytes[1] = KS_MENU;
+    bytes[2] = KE_FILLER;
+    add_to_input_buf(bytes, 3);
+    add_long_to_buf((long_u)menu, bytes);
+    add_to_input_buf_csi(bytes, sizeof(long_u));
+}
+#endif
+
+static int	prev_which_scrollbars[3];
+
+/*
+ * Set which components are present.
+ * If "oldval" is not NULL, "oldval" is the previous value, the new value is
+ * in p_go.
+ */
+    void
+gui_init_which_components(char_u *oldval UNUSED)
+{
+#ifdef FEAT_GUI_DARKTHEME
+    static int	prev_dark_theme = -1;
+    int		using_dark_theme = FALSE;
+#endif
+#ifdef FEAT_MENU
+    static int	prev_menu_is_active = -1;
+#endif
+#ifdef FEAT_TOOLBAR
+    static int	prev_toolbar = -1;
+    int		using_toolbar = FALSE;
+#endif
+#ifdef FEAT_GUI_TABLINE
+    int		using_tabline;
+#endif
+#ifdef FEAT_FOOTER
+    static int	prev_footer = -1;
+    int		using_footer = FALSE;
+#endif
+#if defined(FEAT_MENU)
+    static int	prev_tearoff = -1;
+    int		using_tearoff = FALSE;
+#endif
+
+    char_u	*p;
+    int		i;
+#ifdef FEAT_MENU
+    int		grey_old, grey_new;
+    char_u	*temp;
+#endif
+    win_T	*wp;
+    int		need_set_size;
+    int		fix_size;
+
+#ifdef FEAT_MENU
+    if (oldval != NULL && gui.in_use)
+    {
+	/*
+	 * Check if the menus go from grey to non-grey or vice versa.
+	 */
+	grey_old = (vim_strchr(oldval, GO_GREY) != NULL);
+	grey_new = (vim_strchr(p_go, GO_GREY) != NULL);
+	if (grey_old != grey_new)
+	{
+	    temp = p_go;
+	    p_go = oldval;
+	    gui_update_menus(MENU_ALL_MODES);
+	    p_go = temp;
+	}
+    }
+    gui.menu_is_active = FALSE;
+#endif
+
+    for (i = 0; i < 3; i++)
+	gui.which_scrollbars[i] = FALSE;
+    for (p = p_go; *p; p++)
+	switch (*p)
+	{
+	    case GO_LEFT:
+		gui.which_scrollbars[SBAR_LEFT] = TRUE;
+		break;
+	    case GO_RIGHT:
+		gui.which_scrollbars[SBAR_RIGHT] = TRUE;
+		break;
+	    case GO_VLEFT:
+		if (win_hasvertsplit())
+		    gui.which_scrollbars[SBAR_LEFT] = TRUE;
+		break;
+	    case GO_VRIGHT:
+		if (win_hasvertsplit())
+		    gui.which_scrollbars[SBAR_RIGHT] = TRUE;
+		break;
+	    case GO_BOT:
+		gui.which_scrollbars[SBAR_BOTTOM] = TRUE;
+		break;
+#ifdef FEAT_GUI_DARKTHEME
+	    case GO_DARKTHEME:
+		using_dark_theme = TRUE;
+		break;
+#endif
+#ifdef FEAT_MENU
+	    case GO_MENUS:
+		gui.menu_is_active = TRUE;
+		break;
+#endif
+	    case GO_GREY:
+		// make menu's have grey items, ignored here
+		break;
+#ifdef FEAT_TOOLBAR
+	    case GO_TOOLBAR:
+		using_toolbar = TRUE;
+		break;
+#endif
+#ifdef FEAT_FOOTER
+	    case GO_FOOTER:
+		using_footer = TRUE;
+		break;
+#endif
+	    case GO_TEAROFF:
+#if defined(FEAT_MENU)
+		using_tearoff = TRUE;
+#endif
+		break;
+	    default:
+		// Ignore options that are not supported
+		break;
+	}
+
+    if (gui.in_use)
+    {
+	need_set_size = 0;
+	fix_size = FALSE;
+
+#ifdef FEAT_GUI_DARKTHEME
+	if (using_dark_theme != prev_dark_theme)
+	{
+	    gui_mch_set_dark_theme(using_dark_theme);
+	    prev_dark_theme = using_dark_theme;
+	}
+#endif
+
+#ifdef FEAT_GUI_TABLINE
+	// Update the GUI tab line, it may appear or disappear.  This may
+	// cause the non-GUI tab line to disappear or appear.
+	using_tabline = gui_has_tabline();
+	if (!gui_mch_showing_tabline() != !using_tabline)
+	{
+	    // We don't want a resize event change "Rows" here, save and
+	    // restore it.  Resizing is handled below.
+	    i = Rows;
+	    gui_update_tabline();
+	    Rows = i;
+	    need_set_size |= RESIZE_VERT;
+	    if (using_tabline)
+		fix_size = TRUE;
+	    if (!gui_use_tabline())
+		redraw_tabline = TRUE;    // may draw non-GUI tab line
+	}
+#endif
+
+	for (i = 0; i < 3; i++)
+	{
+	    // The scrollbar needs to be updated when it is shown/unshown and
+	    // when switching tab pages.  But the size only changes when it's
+	    // shown/unshown.  Thus we need two places to remember whether a
+	    // scrollbar is there or not.
+	    if (gui.which_scrollbars[i] != prev_which_scrollbars[i]
+		    || gui.which_scrollbars[i]
+					!= curtab->tp_prev_which_scrollbars[i])
+	    {
+		if (i == SBAR_BOTTOM)
+		    gui_mch_enable_scrollbar(&gui.bottom_sbar,
+						     gui.which_scrollbars[i]);
+		else
+		{
+		    FOR_ALL_WINDOWS(wp)
+			gui_do_scrollbar(wp, i, gui.which_scrollbars[i]);
+		}
+		if (gui.which_scrollbars[i] != prev_which_scrollbars[i])
+		{
+		    if (i == SBAR_BOTTOM)
+			need_set_size |= RESIZE_VERT;
+		    else
+			need_set_size |= RESIZE_HOR;
+		    if (gui.which_scrollbars[i])
+			fix_size = TRUE;
+		}
+	    }
+	    curtab->tp_prev_which_scrollbars[i] = gui.which_scrollbars[i];
+	    prev_which_scrollbars[i] = gui.which_scrollbars[i];
+	}
+
+#ifdef FEAT_MENU
+	if (gui.menu_is_active != prev_menu_is_active)
+	{
+	    // We don't want a resize event change "Rows" here, save and
+	    // restore it.  Resizing is handled below.
+	    i = Rows;
+	    gui_mch_enable_menu(gui.menu_is_active);
+	    Rows = i;
+	    prev_menu_is_active = gui.menu_is_active;
+	    need_set_size |= RESIZE_VERT;
+	    if (gui.menu_is_active)
+		fix_size = TRUE;
+	}
+#endif
+
+#ifdef FEAT_TOOLBAR
+	if (using_toolbar != prev_toolbar)
+	{
+	    gui_mch_show_toolbar(using_toolbar);
+	    prev_toolbar = using_toolbar;
+	    need_set_size |= RESIZE_VERT;
+	    if (using_toolbar)
+		fix_size = TRUE;
+	}
+#endif
+#ifdef FEAT_FOOTER
+	if (using_footer != prev_footer)
+	{
+	    gui_mch_enable_footer(using_footer);
+	    prev_footer = using_footer;
+	    need_set_size |= RESIZE_VERT;
+	    if (using_footer)
+		fix_size = TRUE;
+	}
+#endif
+#if defined(FEAT_MENU) && !(defined(MSWIN) && !defined(FEAT_TEAROFF))
+	if (using_tearoff != prev_tearoff)
+	{
+	    gui_mch_toggle_tearoffs(using_tearoff);
+	    prev_tearoff = using_tearoff;
+	}
+#endif
+	if (need_set_size != 0)
+	{
+#ifdef FEAT_GUI_GTK
+	    long    prev_Columns = Columns;
+	    long    prev_Rows = Rows;
+#endif
+	    // Adjust the size of the window to make the text area keep the
+	    // same size and to avoid that part of our window is off-screen
+	    // and a scrollbar can't be used, for example.
+	    gui_set_shellsize(FALSE, fix_size, need_set_size);
+
+#ifdef FEAT_GUI_GTK
+	    // GTK has the annoying habit of sending us resize events when
+	    // changing the window size ourselves.  This mostly happens when
+	    // waiting for a character to arrive, quite unpredictably, and may
+	    // change Columns and Rows when we don't want it.  Wait for a
+	    // character here to avoid this effect.
+	    // If you remove this, please test this command for resizing
+	    // effects (with optional left scrollbar): ":vsp|q|vsp|q|vsp|q".
+	    // Don't do this while starting up though.
+	    // Don't change Rows when adding menu/toolbar/tabline.
+	    // Don't change Columns when adding vertical toolbar.
+	    if (!gui.starting && need_set_size != (RESIZE_VERT | RESIZE_HOR))
+		(void)char_avail();
+	    if ((need_set_size & RESIZE_VERT) == 0)
+		Rows = prev_Rows;
+	    if ((need_set_size & RESIZE_HOR) == 0)
+		Columns = prev_Columns;
+#endif
+	}
+	// When the console tabline appears or disappears the window positions
+	// change.
+	if (firstwin->w_winrow != tabline_height())
+	    shell_new_rows();	// recompute window positions and heights
+    }
+}
+
+#if defined(FEAT_GUI_TABLINE) || defined(PROTO)
+/*
+ * Return TRUE if the GUI is taking care of the tabline.
+ * It may still be hidden if 'showtabline' is zero.
+ */
+    int
+gui_use_tabline(void)
+{
+    return gui.in_use && vim_strchr(p_go, GO_TABLINE) != NULL;
+}
+
+/*
+ * Return TRUE if the GUI is showing the tabline.
+ * This uses 'showtabline'.
+ */
+    static int
+gui_has_tabline(void)
+{
+    if (!gui_use_tabline()
+	    || p_stal == 0
+	    || (p_stal == 1 && first_tabpage->tp_next == NULL))
+	return FALSE;
+    return TRUE;
+}
+
+/*
+ * Update the tabline.
+ * This may display/undisplay the tabline and update the labels.
+ */
+    void
+gui_update_tabline(void)
+{
+    int	    showit = gui_has_tabline();
+    int	    shown = gui_mch_showing_tabline();
+
+    if (!gui.starting && starting == 0)
+    {
+	// Updating the tabline uses direct GUI commands, flush
+	// outstanding instructions first. (esp. clear screen)
+	out_flush();
+
+	if (!showit != !shown)
+	    gui_mch_show_tabline(showit);
+	if (showit != 0)
+	    gui_mch_update_tabline();
+
+	// When the tabs change from hidden to shown or from shown to
+	// hidden the size of the text area should remain the same.
+	if (!showit != !shown)
+	    gui_set_shellsize(FALSE, showit, RESIZE_VERT);
+    }
+}
+
+/*
+ * Get the label or tooltip for tab page "tp" into NameBuff[].
+ */
+    void
+get_tabline_label(
+    tabpage_T	*tp,
+    int		tooltip)	// TRUE: get tooltip
+{
+    int		modified = FALSE;
+    char_u	buf[40];
+    int		wincount;
+    win_T	*wp;
+    char_u	**opt;
+
+    // Use 'guitablabel' or 'guitabtooltip' if it's set.
+    opt = (tooltip ? &p_gtt : &p_gtl);
+    if (**opt != NUL)
+    {
+	int	use_sandbox = FALSE;
+	int	called_emsg_before = called_emsg;
+	char_u	res[MAXPATHL];
+	tabpage_T *save_curtab;
+	char_u	*opt_name = (char_u *)(tooltip ? "guitabtooltip"
+							     : "guitablabel");
+
+	printer_page_num = tabpage_index(tp);
+# ifdef FEAT_EVAL
+	set_vim_var_nr(VV_LNUM, printer_page_num);
+	use_sandbox = was_set_insecurely(opt_name, 0);
+# endif
+	// It's almost as going to the tabpage, but without autocommands.
+	curtab->tp_firstwin = firstwin;
+	curtab->tp_lastwin = lastwin;
+	curtab->tp_curwin = curwin;
+	save_curtab = curtab;
+	curtab = tp;
+	topframe = curtab->tp_topframe;
+	firstwin = curtab->tp_firstwin;
+	lastwin = curtab->tp_lastwin;
+	curwin = curtab->tp_curwin;
+	curbuf = curwin->w_buffer;
+
+	// Can't use NameBuff directly, build_stl_str_hl() uses it.
+	build_stl_str_hl(curwin, res, MAXPATHL, *opt, use_sandbox,
+						 0, (int)Columns, NULL, NULL);
+	STRCPY(NameBuff, res);
+
+	// Back to the original curtab.
+	curtab = save_curtab;
+	topframe = curtab->tp_topframe;
+	firstwin = curtab->tp_firstwin;
+	lastwin = curtab->tp_lastwin;
+	curwin = curtab->tp_curwin;
+	curbuf = curwin->w_buffer;
+
+	if (called_emsg > called_emsg_before)
+	    set_string_option_direct(opt_name, -1,
+					   (char_u *)"", OPT_FREE, SID_ERROR);
+    }
+
+    // If 'guitablabel'/'guitabtooltip' is not set or the result is empty then
+    // use a default label.
+    if (**opt == NUL || *NameBuff == NUL)
+    {
+	// Get the buffer name into NameBuff[] and shorten it.
+	get_trans_bufname(tp == curtab ? curbuf : tp->tp_curwin->w_buffer);
+	if (!tooltip)
+	    shorten_dir(NameBuff);
+
+	wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
+	for (wincount = 0; wp != NULL; wp = wp->w_next, ++wincount)
+	    if (bufIsChanged(wp->w_buffer))
+		modified = TRUE;
+	if (modified || wincount > 1)
+	{
+	    if (wincount > 1)
+		vim_snprintf((char *)buf, sizeof(buf), "%d", wincount);
+	    else
+		buf[0] = NUL;
+	    if (modified)
+		STRCAT(buf, "+");
+	    STRCAT(buf, " ");
+	    STRMOVE(NameBuff + STRLEN(buf), NameBuff);
+	    mch_memmove(NameBuff, buf, STRLEN(buf));
+	}
+    }
+}
+
+/*
+ * Send the event for clicking to select tab page "nr".
+ * Returns TRUE if it was done, FALSE when skipped because we are already at
+ * that tab page or the cmdline window is open.
+ */
+    int
+send_tabline_event(int nr)
+{
+    char_u string[3];
+
+    if (nr == tabpage_index(curtab))
+	return FALSE;
+
+    // Don't put events in the input queue now.
+    if (hold_gui_events
+# ifdef FEAT_CMDWIN
+	    || cmdwin_type != 0
+# endif
+	    )
+    {
+	// Set it back to the current tab page.
+	gui_mch_set_curtab(tabpage_index(curtab));
+	return FALSE;
+    }
+
+    string[0] = CSI;
+    string[1] = KS_TABLINE;
+    string[2] = KE_FILLER;
+    add_to_input_buf(string, 3);
+    string[0] = nr;
+    add_to_input_buf_csi(string, 1);
+    return TRUE;
+}
+
+/*
+ * Send a tabline menu event
+ */
+    void
+send_tabline_menu_event(int tabidx, int event)
+{
+    char_u	    string[3];
+
+    // Don't put events in the input queue now.
+    if (hold_gui_events)
+	return;
+
+    // Cannot close the last tabpage.
+    if (event == TABLINE_MENU_CLOSE && first_tabpage->tp_next == NULL)
+	return;
+
+    string[0] = CSI;
+    string[1] = KS_TABMENU;
+    string[2] = KE_FILLER;
+    add_to_input_buf(string, 3);
+    string[0] = tabidx;
+    string[1] = (char_u)(long)event;
+    add_to_input_buf_csi(string, 2);
+}
+
+#endif
+
+/*
+ * Scrollbar stuff:
+ */
+
+/*
+ * Remove all scrollbars.  Used before switching to another tab page.
+ */
+    void
+gui_remove_scrollbars(void)
+{
+    int	    i;
+    win_T   *wp;
+
+    for (i = 0; i < 3; i++)
+    {
+	if (i == SBAR_BOTTOM)
+	    gui_mch_enable_scrollbar(&gui.bottom_sbar, FALSE);
+	else
+	{
+	    FOR_ALL_WINDOWS(wp)
+		gui_do_scrollbar(wp, i, FALSE);
+	}
+	curtab->tp_prev_which_scrollbars[i] = -1;
+    }
+}
+
+    void
+gui_create_scrollbar(scrollbar_T *sb, int type, win_T *wp)
+{
+    static int	sbar_ident = 0;
+
+    sb->ident = sbar_ident++;	// No check for too big, but would it happen?
+    sb->wp = wp;
+    sb->type = type;
+    sb->value = 0;
+#ifdef FEAT_GUI_ATHENA
+    sb->pixval = 0;
+#endif
+    sb->size = 1;
+    sb->max = 1;
+    sb->top = 0;
+    sb->height = 0;
+    sb->width = 0;
+    sb->status_height = 0;
+    gui_mch_create_scrollbar(sb, (wp == NULL) ? SBAR_HORIZ : SBAR_VERT);
+}
+
+/*
+ * Find the scrollbar with the given index.
+ */
+    scrollbar_T *
+gui_find_scrollbar(long ident)
+{
+    win_T	*wp;
+
+    if (gui.bottom_sbar.ident == ident)
+	return &gui.bottom_sbar;
+    FOR_ALL_WINDOWS(wp)
+    {
+	if (wp->w_scrollbars[SBAR_LEFT].ident == ident)
+	    return &wp->w_scrollbars[SBAR_LEFT];
+	if (wp->w_scrollbars[SBAR_RIGHT].ident == ident)
+	    return &wp->w_scrollbars[SBAR_RIGHT];
+    }
+    return NULL;
+}
+
+/*
+ * For most systems: Put a code in the input buffer for a dragged scrollbar.
+ *
+ * For Win32, Macintosh and GTK+ 2:
+ * Scrollbars seem to grab focus and vim doesn't read the input queue until
+ * you stop dragging the scrollbar.  We get here each time the scrollbar is
+ * dragged another pixel, but as far as the rest of vim goes, it thinks
+ * we're just hanging in the call to DispatchMessage() in
+ * process_message().  The DispatchMessage() call that hangs was passed a
+ * mouse button click event in the scrollbar window. -- webb.
+ *
+ * Solution: Do the scrolling right here.  But only when allowed.
+ * Ignore the scrollbars while executing an external command or when there
+ * are still characters to be processed.
+ */
+    void
+gui_drag_scrollbar(scrollbar_T *sb, long value, int still_dragging)
+{
+    win_T	*wp;
+    int		sb_num;
+#ifdef USE_ON_FLY_SCROLL
+    colnr_T	old_leftcol = curwin->w_leftcol;
+    linenr_T	old_topline = curwin->w_topline;
+# ifdef FEAT_DIFF
+    int		old_topfill = curwin->w_topfill;
+# endif
+#else
+    char_u	bytes[sizeof(long_u)];
+    int		byte_count;
+#endif
+
+    if (sb == NULL)
+	return;
+
+    // Don't put events in the input queue now.
+    if (hold_gui_events)
+	return;
+
+#ifdef FEAT_CMDWIN
+    if (cmdwin_type != 0 && sb->wp != curwin)
+	return;
+#endif
+
+    if (still_dragging)
+    {
+	if (sb->wp == NULL)
+	    gui.dragged_sb = SBAR_BOTTOM;
+	else if (sb == &sb->wp->w_scrollbars[SBAR_LEFT])
+	    gui.dragged_sb = SBAR_LEFT;
+	else
+	    gui.dragged_sb = SBAR_RIGHT;
+	gui.dragged_wp = sb->wp;
+    }
+    else
+    {
+	gui.dragged_sb = SBAR_NONE;
+#ifdef FEAT_GUI_GTK
+	// Keep the "dragged_wp" value until after the scrolling, for when the
+	// mouse button is released.  GTK2 doesn't send the button-up event.
+	gui.dragged_wp = NULL;
+#endif
+    }
+
+    // Vertical sbar info is kept in the first sbar (the left one)
+    if (sb->wp != NULL)
+	sb = &sb->wp->w_scrollbars[0];
+
+    /*
+     * Check validity of value
+     */
+    if (value < 0)
+	value = 0;
+#ifdef SCROLL_PAST_END
+    else if (value > sb->max)
+	value = sb->max;
+#else
+    if (value > sb->max - sb->size + 1)
+	value = sb->max - sb->size + 1;
+#endif
+
+    sb->value = value;
+
+#ifdef USE_ON_FLY_SCROLL
+    // When not allowed to do the scrolling right now, return.
+    // This also checked input_available(), but that causes the first click in
+    // a scrollbar to be ignored when Vim doesn't have focus.
+    if (dont_scroll)
+	return;
+#endif
+    // Disallow scrolling the current window when the completion popup menu is
+    // visible.
+    if ((sb->wp == NULL || sb->wp == curwin) && pum_visible())
+	return;
+
+#ifdef FEAT_RIGHTLEFT
+    if (sb->wp == NULL && curwin->w_p_rl)
+    {
+	value = sb->max + 1 - sb->size - value;
+	if (value < 0)
+	    value = 0;
+    }
+#endif
+
+    if (sb->wp != NULL)		// vertical scrollbar
+    {
+	sb_num = 0;
+	for (wp = firstwin; wp != sb->wp && wp != NULL; wp = wp->w_next)
+	    sb_num++;
+	if (wp == NULL)
+	    return;
+
+#ifdef USE_ON_FLY_SCROLL
+	current_scrollbar = sb_num;
+	scrollbar_value = value;
+	if (State & NORMAL)
+	{
+	    gui_do_scroll();
+	    setcursor();
+	}
+	else if (State & INSERT)
+	{
+	    ins_scroll();
+	    setcursor();
+	}
+	else if (State & CMDLINE)
+	{
+	    if (msg_scrolled == 0)
+	    {
+		gui_do_scroll();
+		redrawcmdline();
+	    }
+	}
+# ifdef FEAT_FOLDING
+	// Value may have been changed for closed fold.
+	sb->value = sb->wp->w_topline - 1;
+# endif
+
+	// When dragging one scrollbar and there is another one at the other
+	// side move the thumb of that one too.
+	if (gui.which_scrollbars[SBAR_RIGHT] && gui.which_scrollbars[SBAR_LEFT])
+	    gui_mch_set_scrollbar_thumb(
+		    &sb->wp->w_scrollbars[
+			    sb == &sb->wp->w_scrollbars[SBAR_RIGHT]
+						    ? SBAR_LEFT : SBAR_RIGHT],
+		    sb->value, sb->size, sb->max);
+
+#else
+	bytes[0] = CSI;
+	bytes[1] = KS_VER_SCROLLBAR;
+	bytes[2] = KE_FILLER;
+	bytes[3] = (char_u)sb_num;
+	byte_count = 4;
+#endif
+    }
+    else
+    {
+#ifdef USE_ON_FLY_SCROLL
+	scrollbar_value = value;
+
+	if (State & NORMAL)
+	    gui_do_horiz_scroll(scrollbar_value, FALSE);
+	else if (State & INSERT)
+	    ins_horscroll();
+	else if (State & CMDLINE)
+	{
+	    if (msg_scrolled == 0)
+	    {
+		gui_do_horiz_scroll(scrollbar_value, FALSE);
+		redrawcmdline();
+	    }
+	}
+	if (old_leftcol != curwin->w_leftcol)
+	{
+	    updateWindow(curwin);   // update window, status and cmdline
+	    setcursor();
+	}
+#else
+	bytes[0] = CSI;
+	bytes[1] = KS_HOR_SCROLLBAR;
+	bytes[2] = KE_FILLER;
+	byte_count = 3;
+#endif
+    }
+
+#ifdef USE_ON_FLY_SCROLL
+    /*
+     * synchronize other windows, as necessary according to 'scrollbind'
+     */
+    if (curwin->w_p_scb
+	    && ((sb->wp == NULL && curwin->w_leftcol != old_leftcol)
+		|| (sb->wp == curwin && (curwin->w_topline != old_topline
+# ifdef FEAT_DIFF
+					   || curwin->w_topfill != old_topfill
+# endif
+			))))
+    {
+	do_check_scrollbind(TRUE);
+	// need to update the window right here
+	FOR_ALL_WINDOWS(wp)
+	    if (wp->w_redr_type > 0)
+		updateWindow(wp);
+	setcursor();
+    }
+    out_flush_cursor(FALSE, TRUE);
+#else
+    add_to_input_buf(bytes, byte_count);
+    add_long_to_buf((long_u)value, bytes);
+    add_to_input_buf_csi(bytes, sizeof(long_u));
+#endif
+}
+
+/*
+ * Scrollbar stuff:
+ */
+
+/*
+ * Called when something in the window layout has changed.
+ */
+    void
+gui_may_update_scrollbars(void)
+{
+    if (gui.in_use && starting == 0)
+    {
+	out_flush();
+	gui_init_which_components(NULL);
+	gui_update_scrollbars(TRUE);
+    }
+    need_mouse_correct = TRUE;
+}
+
+    void
+gui_update_scrollbars(
+    int		force)	    // Force all scrollbars to get updated
+{
+    win_T	*wp;
+    scrollbar_T	*sb;
+    long	val, size, max;		// need 32 bits here
+    int		which_sb;
+    int		h, y;
+    static win_T *prev_curwin = NULL;
+
+    // Update the horizontal scrollbar
+    gui_update_horiz_scrollbar(force);
+
+#ifndef MSWIN
+    // Return straight away if there is neither a left nor right scrollbar.
+    // On MS-Windows this is required anyway for scrollwheel messages.
+    if (!gui.which_scrollbars[SBAR_LEFT] && !gui.which_scrollbars[SBAR_RIGHT])
+	return;
+#endif
+
+    /*
+     * Don't want to update a scrollbar while we're dragging it.  But if we
+     * have both a left and right scrollbar, and we drag one of them, we still
+     * need to update the other one.
+     */
+    if (!force && (gui.dragged_sb == SBAR_LEFT || gui.dragged_sb == SBAR_RIGHT)
+	    && gui.which_scrollbars[SBAR_LEFT]
+	    && gui.which_scrollbars[SBAR_RIGHT])
+    {
+	/*
+	 * If we have two scrollbars and one of them is being dragged, just
+	 * copy the scrollbar position from the dragged one to the other one.
+	 */
+	which_sb = SBAR_LEFT + SBAR_RIGHT - gui.dragged_sb;
+	if (gui.dragged_wp != NULL)
+	    gui_mch_set_scrollbar_thumb(
+		    &gui.dragged_wp->w_scrollbars[which_sb],
+		    gui.dragged_wp->w_scrollbars[0].value,
+		    gui.dragged_wp->w_scrollbars[0].size,
+		    gui.dragged_wp->w_scrollbars[0].max);
+    }
+
+    // avoid that moving components around generates events
+    ++hold_gui_events;
+
+    FOR_ALL_WINDOWS(wp)
+    {
+	if (wp->w_buffer == NULL)	// just in case
+	    continue;
+	// Skip a scrollbar that is being dragged.
+	if (!force && (gui.dragged_sb == SBAR_LEFT
+					     || gui.dragged_sb == SBAR_RIGHT)
+		&& gui.dragged_wp == wp)
+	    continue;
+
+#ifdef SCROLL_PAST_END
+	max = wp->w_buffer->b_ml.ml_line_count - 1;
+#else
+	max = wp->w_buffer->b_ml.ml_line_count + wp->w_height - 2;
+#endif
+	if (max < 0)			// empty buffer
+	    max = 0;
+	val = wp->w_topline - 1;
+	size = wp->w_height;
+#ifdef SCROLL_PAST_END
+	if (val > max)			// just in case
+	    val = max;
+#else
+	if (size > max + 1)		// just in case
+	    size = max + 1;
+	if (val > max - size + 1)
+	    val = max - size + 1;
+#endif
+	if (val < 0)			// minimal value is 0
+	    val = 0;
+
+	/*
+	 * Scrollbar at index 0 (the left one) contains all the information.
+	 * It would be the same info for left and right so we just store it for
+	 * one of them.
+	 */
+	sb = &wp->w_scrollbars[0];
+
+	/*
+	 * Note: no check for valid w_botline.	If it's not valid the
+	 * scrollbars will be updated later anyway.
+	 */
+	if (size < 1 || wp->w_botline - 2 > max)
+	{
+	    /*
+	     * This can happen during changing files.  Just don't update the
+	     * scrollbar for now.
+	     */
+	    sb->height = 0;	    // Force update next time
+	    if (gui.which_scrollbars[SBAR_LEFT])
+		gui_do_scrollbar(wp, SBAR_LEFT, FALSE);
+	    if (gui.which_scrollbars[SBAR_RIGHT])
+		gui_do_scrollbar(wp, SBAR_RIGHT, FALSE);
+	    continue;
+	}
+	if (force || sb->height != wp->w_height
+	    || sb->top != wp->w_winrow
+	    || sb->status_height != wp->w_status_height
+	    || sb->width != wp->w_width
+	    || prev_curwin != curwin)
+	{
+	    // Height, width or position of scrollbar has changed.  For
+	    // vertical split: curwin changed.
+	    sb->height = wp->w_height;
+	    sb->top = wp->w_winrow;
+	    sb->status_height = wp->w_status_height;
+	    sb->width = wp->w_width;
+
+	    // Calculate height and position in pixels
+	    h = (sb->height + sb->status_height) * gui.char_height;
+	    y = sb->top * gui.char_height + gui.border_offset;
+#if defined(FEAT_MENU) && !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MOTIF) && !defined(FEAT_GUI_PHOTON)
+	    if (gui.menu_is_active)
+		y += gui.menu_height;
+#endif
+
+#if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_ATHENA) \
+	|| defined(FEAT_GUI_HAIKU))
+	    if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
+# if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_HAIKU)
+		y += gui.toolbar_height;
+# else
+#  ifdef FEAT_GUI_MSWIN
+		y += TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT;
+#  endif
+# endif
+#endif
+
+#if defined(FEAT_GUI_TABLINE) && defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_HAIKU)
+	    if (gui_has_tabline())
+		y += gui.tabline_height;
+#endif
+
+	    if (wp->w_winrow == 0)
+	    {
+		// Height of top scrollbar includes width of top border
+		h += gui.border_offset;
+		y -= gui.border_offset;
+	    }
+	    if (gui.which_scrollbars[SBAR_LEFT])
+	    {
+		gui_mch_set_scrollbar_pos(&wp->w_scrollbars[SBAR_LEFT],
+					  gui.left_sbar_x, y,
+					  gui.scrollbar_width, h);
+		gui_do_scrollbar(wp, SBAR_LEFT, TRUE);
+	    }
+	    if (gui.which_scrollbars[SBAR_RIGHT])
+	    {
+		gui_mch_set_scrollbar_pos(&wp->w_scrollbars[SBAR_RIGHT],
+					  gui.right_sbar_x, y,
+					  gui.scrollbar_width, h);
+		gui_do_scrollbar(wp, SBAR_RIGHT, TRUE);
+	    }
+	}
+
+	// Reduce the number of calls to gui_mch_set_scrollbar_thumb() by
+	// checking if the thumb moved at least a pixel.  Only do this for
+	// Athena, most other GUIs require the update anyway to make the
+	// arrows work.
+#ifdef FEAT_GUI_ATHENA
+	if (max == 0)
+	    y = 0;
+	else
+	    y = (val * (sb->height + 2) * gui.char_height + max / 2) / max;
+	if (force || sb->pixval != y || sb->size != size || sb->max != max)
+#else
+	if (force || sb->value != val || sb->size != size || sb->max != max)
+#endif
+	{
+	    // Thumb of scrollbar has moved
+	    sb->value = val;
+#ifdef FEAT_GUI_ATHENA
+	    sb->pixval = y;
+#endif
+	    sb->size = size;
+	    sb->max = max;
+	    if (gui.which_scrollbars[SBAR_LEFT]
+		    && (gui.dragged_sb != SBAR_LEFT || gui.dragged_wp != wp))
+		gui_mch_set_scrollbar_thumb(&wp->w_scrollbars[SBAR_LEFT],
+					    val, size, max);
+	    if (gui.which_scrollbars[SBAR_RIGHT]
+		    && (gui.dragged_sb != SBAR_RIGHT || gui.dragged_wp != wp))
+		gui_mch_set_scrollbar_thumb(&wp->w_scrollbars[SBAR_RIGHT],
+					    val, size, max);
+	}
+    }
+    prev_curwin = curwin;
+    --hold_gui_events;
+}
+
+/*
+ * Enable or disable a scrollbar.
+ * Check for scrollbars for vertically split windows which are not enabled
+ * sometimes.
+ */
+    static void
+gui_do_scrollbar(
+    win_T	*wp,
+    int		which,	    // SBAR_LEFT or SBAR_RIGHT
+    int		enable)	    // TRUE to enable scrollbar
+{
+    int		midcol = curwin->w_wincol + curwin->w_width / 2;
+    int		has_midcol = (wp->w_wincol <= midcol
+				     && wp->w_wincol + wp->w_width >= midcol);
+
+    // Only enable scrollbars that contain the middle column of the current
+    // window.
+    if (gui.which_scrollbars[SBAR_RIGHT] != gui.which_scrollbars[SBAR_LEFT])
+    {
+	// Scrollbars only on one side.  Don't enable scrollbars that don't
+	// contain the middle column of the current window.
+	if (!has_midcol)
+	    enable = FALSE;
+    }
+    else
+    {
+	// Scrollbars on both sides.  Don't enable scrollbars that neither
+	// contain the middle column of the current window nor are on the far
+	// side.
+	if (midcol > Columns / 2)
+	{
+	    if (which == SBAR_LEFT ? wp->w_wincol != 0 : !has_midcol)
+		enable = FALSE;
+	}
+	else
+	{
+	    if (which == SBAR_RIGHT ? wp->w_wincol + wp->w_width != Columns
+								: !has_midcol)
+		enable = FALSE;
+	}
+    }
+    gui_mch_enable_scrollbar(&wp->w_scrollbars[which], enable);
+}
+
+/*
+ * Scroll a window according to the values set in the globals current_scrollbar
+ * and scrollbar_value.  Return TRUE if the cursor in the current window moved
+ * or FALSE otherwise.
+ */
+    int
+gui_do_scroll(void)
+{
+    win_T	*wp, *save_wp;
+    int		i;
+    long	nlines;
+    pos_T	old_cursor;
+    linenr_T	old_topline;
+#ifdef FEAT_DIFF
+    int		old_topfill;
+#endif
+
+    for (wp = firstwin, i = 0; i < current_scrollbar; wp = W_NEXT(wp), i++)
+	if (wp == NULL)
+	    break;
+    if (wp == NULL)
+	// Couldn't find window
+	return FALSE;
+
+    /*
+     * Compute number of lines to scroll.  If zero, nothing to do.
+     */
+    nlines = (long)scrollbar_value + 1 - (long)wp->w_topline;
+    if (nlines == 0)
+	return FALSE;
+
+    save_wp = curwin;
+    old_topline = wp->w_topline;
+#ifdef FEAT_DIFF
+    old_topfill = wp->w_topfill;
+#endif
+    old_cursor = wp->w_cursor;
+    curwin = wp;
+    curbuf = wp->w_buffer;
+    if (nlines < 0)
+	scrolldown(-nlines, gui.dragged_wp == NULL);
+    else
+	scrollup(nlines, gui.dragged_wp == NULL);
+    // Reset dragged_wp after using it.  "dragged_sb" will have been reset for
+    // the mouse-up event already, but we still want it to behave like when
+    // dragging.  But not the next click in an arrow.
+    if (gui.dragged_sb == SBAR_NONE)
+	gui.dragged_wp = NULL;
+
+    if (old_topline != wp->w_topline
+#ifdef FEAT_DIFF
+	    || old_topfill != wp->w_topfill
+#endif
+	    )
+    {
+	if (get_scrolloff_value() != 0)
+	{
+	    cursor_correct();		// fix window for 'so'
+	    update_topline();		// avoid up/down jump
+	}
+	if (old_cursor.lnum != wp->w_cursor.lnum)
+	    coladvance(wp->w_curswant);
+	wp->w_scbind_pos = wp->w_topline;
+    }
+
+    // Make sure wp->w_leftcol and wp->w_skipcol are correct.
+    validate_cursor();
+
+    curwin = save_wp;
+    curbuf = save_wp->w_buffer;
+
+    /*
+     * Don't call updateWindow() when nothing has changed (it will overwrite
+     * the status line!).
+     */
+    if (old_topline != wp->w_topline
+	    || wp->w_redr_type != 0
+#ifdef FEAT_DIFF
+	    || old_topfill != wp->w_topfill
+#endif
+	    )
+    {
+	int type = VALID;
+
+	if (pum_visible())
+	{
+	    type = NOT_VALID;
+	    wp->w_lines_valid = 0;
+	}
+
+	// Don't set must_redraw here, it may cause the popup menu to
+	// disappear when losing focus after a scrollbar drag.
+	if (wp->w_redr_type < type)
+	    wp->w_redr_type = type;
+	mch_disable_flush();
+	updateWindow(wp);   // update window, status line, and cmdline
+	mch_enable_flush();
+    }
+
+    // May need to redraw the popup menu.
+    if (pum_visible())
+	pum_redraw();
+
+    return (wp == curwin && !EQUAL_POS(curwin->w_cursor, old_cursor));
+}
+
+
+/*
+ * Horizontal scrollbar stuff:
+ */
+
+/*
+ * Return length of line "lnum" for horizontal scrolling.
+ */
+    static colnr_T
+scroll_line_len(linenr_T lnum)
+{
+    char_u	*p;
+    colnr_T	col;
+    int		w;
+
+    p = ml_get(lnum);
+    col = 0;
+    if (*p != NUL)
+	for (;;)
+	{
+	    w = chartabsize(p, col);
+	    MB_PTR_ADV(p);
+	    if (*p == NUL)		// don't count the last character
+		break;
+	    col += w;
+	}
+    return col;
+}
+
+// Remember which line is currently the longest, so that we don't have to
+// search for it when scrolling horizontally.
+static linenr_T longest_lnum = 0;
+
+/*
+ * Find longest visible line number.  If this is not possible (or not desired,
+ * by setting 'h' in "guioptions") then the current line number is returned.
+ */
+    static linenr_T
+gui_find_longest_lnum(void)
+{
+    linenr_T ret = 0;
+
+    // Calculate maximum for horizontal scrollbar.  Check for reasonable
+    // line numbers, topline and botline can be invalid when displaying is
+    // postponed.
+    if (vim_strchr(p_go, GO_HORSCROLL) == NULL
+	    && curwin->w_topline <= curwin->w_cursor.lnum
+	    && curwin->w_botline > curwin->w_cursor.lnum
+	    && curwin->w_botline <= curbuf->b_ml.ml_line_count + 1)
+    {
+	linenr_T    lnum;
+	colnr_T	    n;
+	long	    max = 0;
+
+	// Use maximum of all visible lines.  Remember the lnum of the
+	// longest line, closest to the cursor line.  Used when scrolling
+	// below.
+	for (lnum = curwin->w_topline; lnum < curwin->w_botline; ++lnum)
+	{
+	    n = scroll_line_len(lnum);
+	    if (n > (colnr_T)max)
+	    {
+		max = n;
+		ret = lnum;
+	    }
+	    else if (n == (colnr_T)max
+		    && abs((int)(lnum - curwin->w_cursor.lnum))
+		       < abs((int)(ret - curwin->w_cursor.lnum)))
+		ret = lnum;
+	}
+    }
+    else
+	// Use cursor line only.
+	ret = curwin->w_cursor.lnum;
+
+    return ret;
+}
+
+    static void
+gui_update_horiz_scrollbar(int force)
+{
+    long	value, size, max;	// need 32 bit ints here
+
+    if (!gui.which_scrollbars[SBAR_BOTTOM])
+	return;
+
+    if (!force && gui.dragged_sb == SBAR_BOTTOM)
+	return;
+
+    if (!force && curwin->w_p_wrap && gui.prev_wrap)
+	return;
+
+    /*
+     * It is possible for the cursor to be invalid if we're in the middle of
+     * something (like changing files).  If so, don't do anything for now.
+     */
+    if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
+    {
+	gui.bottom_sbar.value = -1;
+	return;
+    }
+
+    size = curwin->w_width;
+    if (curwin->w_p_wrap)
+    {
+	value = 0;
+#ifdef SCROLL_PAST_END
+	max = 0;
+#else
+	max = curwin->w_width - 1;
+#endif
+    }
+    else
+    {
+	value = curwin->w_leftcol;
+
+	longest_lnum = gui_find_longest_lnum();
+	max = scroll_line_len(longest_lnum);
+
+	if (virtual_active())
+	{
+	    // May move the cursor even further to the right.
+	    if (curwin->w_virtcol >= (colnr_T)max)
+		max = curwin->w_virtcol;
+	}
+
+#ifndef SCROLL_PAST_END
+	max += curwin->w_width - 1;
+#endif
+	// The line number isn't scrolled, thus there is less space when
+	// 'number' or 'relativenumber' is set (also for 'foldcolumn').
+	size -= curwin_col_off();
+#ifndef SCROLL_PAST_END
+	max -= curwin_col_off();
+#endif
+    }
+
+#ifndef SCROLL_PAST_END
+    if (value > max - size + 1)
+	value = max - size + 1;	    // limit the value to allowable range
+#endif
+
+#ifdef FEAT_RIGHTLEFT
+    if (curwin->w_p_rl)
+    {
+	value = max + 1 - size - value;
+	if (value < 0)
+	{
+	    size += value;
+	    value = 0;
+	}
+    }
+#endif
+    if (!force && value == gui.bottom_sbar.value && size == gui.bottom_sbar.size
+						&& max == gui.bottom_sbar.max)
+	return;
+
+    gui.bottom_sbar.value = value;
+    gui.bottom_sbar.size = size;
+    gui.bottom_sbar.max = max;
+    gui.prev_wrap = curwin->w_p_wrap;
+
+    gui_mch_set_scrollbar_thumb(&gui.bottom_sbar, value, size, max);
+}
+
+/*
+ * Do a horizontal scroll.  Return TRUE if the cursor moved, FALSE otherwise.
+ */
+    int
+gui_do_horiz_scroll(long_u leftcol, int compute_longest_lnum)
+{
+    // no wrapping, no scrolling
+    if (curwin->w_p_wrap)
+	return FALSE;
+
+    if (curwin->w_leftcol == (colnr_T)leftcol)
+	return FALSE;
+
+    curwin->w_leftcol = (colnr_T)leftcol;
+
+    // When the line of the cursor is too short, move the cursor to the
+    // longest visible line.
+    if (vim_strchr(p_go, GO_HORSCROLL) == NULL
+	    && !virtual_active()
+	    && (colnr_T)leftcol > scroll_line_len(curwin->w_cursor.lnum))
+    {
+	if (compute_longest_lnum)
+	{
+	    curwin->w_cursor.lnum = gui_find_longest_lnum();
+	    curwin->w_cursor.col = 0;
+	}
+	// Do a sanity check on "longest_lnum", just in case.
+	else if (longest_lnum >= curwin->w_topline
+		&& longest_lnum < curwin->w_botline)
+	{
+	    curwin->w_cursor.lnum = longest_lnum;
+	    curwin->w_cursor.col = 0;
+	}
+    }
+
+    return leftcol_changed();
+}
+
+/*
+ * Check that none of the colors are the same as the background color
+ */
+    void
+gui_check_colors(void)
+{
+    if (gui.norm_pixel == gui.back_pixel || gui.norm_pixel == INVALCOLOR)
+    {
+	gui_set_bg_color((char_u *)"White");
+	if (gui.norm_pixel == gui.back_pixel || gui.norm_pixel == INVALCOLOR)
+	    gui_set_fg_color((char_u *)"Black");
+    }
+}
+
+    static void
+gui_set_fg_color(char_u *name)
+{
+    gui.norm_pixel = gui_get_color(name);
+    hl_set_fg_color_name(vim_strsave(name));
+}
+
+    static void
+gui_set_bg_color(char_u *name)
+{
+    gui.back_pixel = gui_get_color(name);
+    hl_set_bg_color_name(vim_strsave(name));
+}
+
+/*
+ * Allocate a color by name.
+ * Returns INVALCOLOR and gives an error message when failed.
+ */
+    guicolor_T
+gui_get_color(char_u *name)
+{
+    guicolor_T	t;
+
+    if (*name == NUL)
+	return INVALCOLOR;
+    t = gui_mch_get_color(name);
+
+    if (t == INVALCOLOR
+#if defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK)
+	    && gui.in_use
+#endif
+	    )
+	semsg(_(e_alloc_color), name);
+    return t;
+}
+
+/*
+ * Return the grey value of a color (range 0-255).
+ */
+    int
+gui_get_lightness(guicolor_T pixel)
+{
+    long_u	rgb = (long_u)gui_mch_get_rgb(pixel);
+
+    return  (int)(  (((rgb >> 16) & 0xff) * 299)
+		   + (((rgb >> 8) & 0xff) * 587)
+		   +  ((rgb	  & 0xff) * 114)) / 1000;
+}
+
+    char_u *
+gui_bg_default(void)
+{
+    if (gui_get_lightness(gui.back_pixel) < 127)
+	return (char_u *)"dark";
+    return (char_u *)"light";
+}
+
+/*
+ * Option initializations that can only be done after opening the GUI window.
+ */
+    void
+init_gui_options(void)
+{
+    // Set the 'background' option according to the lightness of the
+    // background color, unless the user has set it already.
+    if (!option_was_set((char_u *)"bg") && STRCMP(p_bg, gui_bg_default()) != 0)
+    {
+	set_option_value((char_u *)"bg", 0L, gui_bg_default(), 0);
+	highlight_changed();
+    }
+}
+
+#if defined(FEAT_GUI_X11) || defined(PROTO)
+    void
+gui_new_scrollbar_colors(void)
+{
+    win_T	*wp;
+
+    // Nothing to do if GUI hasn't started yet.
+    if (!gui.in_use)
+	return;
+
+    FOR_ALL_WINDOWS(wp)
+    {
+	gui_mch_set_scrollbar_colors(&(wp->w_scrollbars[SBAR_LEFT]));
+	gui_mch_set_scrollbar_colors(&(wp->w_scrollbars[SBAR_RIGHT]));
+    }
+    gui_mch_set_scrollbar_colors(&gui.bottom_sbar);
+}
+#endif
+
+/*
+ * Call this when focus has changed.
+ */
+    void
+gui_focus_change(int in_focus)
+{
+/*
+ * Skip this code to avoid drawing the cursor when debugging and switching
+ * between the debugger window and gvim.
+ */
+#if 1
+    gui.in_focus = in_focus;
+    out_flush_cursor(TRUE, FALSE);
+
+# ifdef FEAT_XIM
+    xim_set_focus(in_focus);
+# endif
+
+    // Put events in the input queue only when allowed.
+    // ui_focus_change() isn't called directly, because it invokes
+    // autocommands and that must not happen asynchronously.
+    if (!hold_gui_events)
+    {
+	char_u  bytes[3];
+
+	bytes[0] = CSI;
+	bytes[1] = KS_EXTRA;
+	bytes[2] = in_focus ? (int)KE_FOCUSGAINED : (int)KE_FOCUSLOST;
+	add_to_input_buf(bytes, 3);
+    }
+#endif
+}
+
+/*
+ * When mouse moved: apply 'mousefocus'.
+ * Also updates the mouse pointer shape.
+ */
+    static void
+gui_mouse_focus(int x, int y)
+{
+    win_T	*wp;
+    char_u	st[8];
+
+#ifdef FEAT_MOUSESHAPE
+    // Get window pointer, and update mouse shape as well.
+    wp = xy2win(x, y, IGNORE_POPUP);
+#endif
+
+    // Only handle this when 'mousefocus' set and ...
+    if (p_mousef
+	    && !hold_gui_events		// not holding events
+	    && (State & (NORMAL|INSERT))// Normal/Visual/Insert mode
+	    && State != HITRETURN	// but not hit-return prompt
+	    && msg_scrolled == 0	// no scrolled message
+	    && !need_mouse_correct	// not moving the pointer
+	    && gui.in_focus)		// gvim in focus
+    {
+	// Don't move the mouse when it's left or right of the Vim window
+	if (x < 0 || x > Columns * gui.char_width)
+	    return;
+#ifndef FEAT_MOUSESHAPE
+	wp = xy2win(x, y, IGNORE_POPUP);
+#endif
+	if (wp == curwin || wp == NULL)
+	    return;	// still in the same old window, or none at all
+
+	// Ignore position in the tab pages line.
+	if (Y_2_ROW(y) < tabline_height())
+	    return;
+
+	/*
+	 * format a mouse click on status line input
+	 * ala gui_send_mouse_event(0, x, y, 0, 0);
+	 * Trick: Use a column number -1, so that get_pseudo_mouse_code() will
+	 * generate a K_LEFTMOUSE_NM key code.
+	 */
+	if (finish_op)
+	{
+	    // abort the current operator first
+	    st[0] = ESC;
+	    add_to_input_buf(st, 1);
+	}
+	st[0] = CSI;
+	st[1] = KS_MOUSE;
+	st[2] = KE_FILLER;
+	st[3] = (char_u)MOUSE_LEFT;
+	fill_mouse_coord(st + 4,
+		wp->w_wincol == 0 ? -1 : wp->w_wincol + MOUSE_COLOFF,
+		wp->w_height + W_WINROW(wp));
+
+	add_to_input_buf(st, 8);
+	st[3] = (char_u)MOUSE_RELEASE;
+	add_to_input_buf(st, 8);
+#ifdef FEAT_GUI_GTK
+	// Need to wake up the main loop
+	if (gtk_main_level() > 0)
+	    gtk_main_quit();
+#endif
+    }
+}
+
+/*
+ * Called when the mouse moved (but not when dragging).
+ */
+    void
+gui_mouse_moved(int x, int y)
+{
+    // Ignore this while still starting up.
+    if (!gui.in_use || gui.starting)
+	return;
+
+    // apply 'mousefocus' and pointer shape
+    gui_mouse_focus(x, y);
+
+#ifdef FEAT_PROP_POPUP
+    if (popup_visible)
+	// Generate a mouse-moved event, so that the popup can perhaps be
+	// closed, just like in the terminal.
+	gui_send_mouse_event(MOUSE_DRAG, x, y, FALSE, 0);
+#endif
+}
+
+/*
+ * Get the window where the mouse pointer is on.
+ * Returns NULL if not found.
+ */
+    win_T *
+gui_mouse_window(mouse_find_T popup)
+{
+    int		x, y;
+
+    if (!(gui.in_use && (p_mousef || popup == FIND_POPUP)))
+	return NULL;
+    gui_mch_getmouse(&x, &y);
+
+    // Only use the mouse when it's on the Vim window
+    if (x >= 0 && x <= Columns * gui.char_width
+	    && y >= 0 && Y_2_ROW(y) >= tabline_height())
+	return xy2win(x, y, popup);
+    return NULL;
+}
+
+/*
+ * Called when mouse should be moved to window with focus.
+ */
+    void
+gui_mouse_correct(void)
+{
+    win_T	*wp = NULL;
+
+    need_mouse_correct = FALSE;
+
+    wp = gui_mouse_window(IGNORE_POPUP);
+    if (wp != curwin && wp != NULL)	// If in other than current window
+    {
+	validate_cline_row();
+	gui_mch_setmouse((int)W_ENDCOL(curwin) * gui.char_width - 3,
+		(W_WINROW(curwin) + curwin->w_wrow) * gui.char_height
+						     + (gui.char_height) / 2);
+    }
+}
+
+/*
+ * Find window where the mouse pointer "x" / "y" coordinate is in.
+ * As a side effect update the shape of the mouse pointer.
+ */
+    static win_T *
+xy2win(int x, int y, mouse_find_T popup)
+{
+    int		row;
+    int		col;
+    win_T	*wp;
+
+    row = Y_2_ROW(y);
+    col = X_2_COL(x);
+    if (row < 0 || col < 0)		// before first window
+	return NULL;
+    wp = mouse_find_win(&row, &col, popup);
+    if (wp == NULL)
+	return NULL;
+#ifdef FEAT_MOUSESHAPE
+    if (State == HITRETURN || State == ASKMORE)
+    {
+	if (Y_2_ROW(y) >= msg_row)
+	    update_mouseshape(SHAPE_IDX_MOREL);
+	else
+	    update_mouseshape(SHAPE_IDX_MORE);
+    }
+    else if (row > wp->w_height)	// below status line
+	update_mouseshape(SHAPE_IDX_CLINE);
+    else if (!(State & CMDLINE) && wp->w_vsep_width > 0 && col == wp->w_width
+	    && (row != wp->w_height || !stl_connected(wp)) && msg_scrolled == 0)
+	update_mouseshape(SHAPE_IDX_VSEP);
+    else if (!(State & CMDLINE) && wp->w_status_height > 0
+				  && row == wp->w_height && msg_scrolled == 0)
+	update_mouseshape(SHAPE_IDX_STATUS);
+    else
+	update_mouseshape(-2);
+#endif
+    return wp;
+}
+
+/*
+ * ":gui" and ":gvim": Change from the terminal version to the GUI version.
+ * File names may be given to redefine the args list.
+ */
+    void
+ex_gui(exarg_T *eap)
+{
+    char_u	*arg = eap->arg;
+
+    /*
+     * Check for "-f" argument: foreground, don't fork.
+     * Also don't fork when started with "gvim -f".
+     * Do fork when using "gui -b".
+     */
+    if (arg[0] == '-'
+	    && (arg[1] == 'f' || arg[1] == 'b')
+	    && (arg[2] == NUL || VIM_ISWHITE(arg[2])))
+    {
+	gui.dofork = (arg[1] == 'b');
+	eap->arg = skipwhite(eap->arg + 2);
+    }
+    if (!gui.in_use)
+    {
+#if defined(VIMDLL) && !defined(EXPERIMENTAL_GUI_CMD)
+	if (!gui.starting)
+	{
+	    emsg(_(e_nogvim));
+	    return;
+	}
+#endif
+	// Clear the command.  Needed for when forking+exiting, to avoid part
+	// of the argument ending up after the shell prompt.
+	msg_clr_eos_force();
+#ifdef GUI_MAY_SPAWN
+	if (!ends_excmd2(eap->cmd, eap->arg))
+	    gui_start(eap->arg);
+	else
+#endif
+	    gui_start(NULL);
+#ifdef FEAT_JOB_CHANNEL
+	channel_gui_register_all();
+#endif
+    }
+    if (!ends_excmd2(eap->cmd, eap->arg))
+	ex_next(eap);
+}
+
+#if ((defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK) \
+	    || defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_PHOTON) \
+	    || defined(FEAT_GUI_HAIKU)) \
+	    && defined(FEAT_TOOLBAR)) || defined(PROTO)
+/*
+ * This is shared between Athena, Haiku, Motif, and GTK.
+ */
+
+/*
+ * Callback function for do_in_runtimepath().
+ */
+    static void
+gfp_setname(char_u *fname, void *cookie)
+{
+    char_u	*gfp_buffer = cookie;
+
+    if (STRLEN(fname) >= MAXPATHL)
+	*gfp_buffer = NUL;
+    else
+	STRCPY(gfp_buffer, fname);
+}
+
+/*
+ * Find the path of bitmap "name" with extension "ext" in 'runtimepath'.
+ * Return FAIL for failure and OK if buffer[MAXPATHL] contains the result.
+ */
+    int
+gui_find_bitmap(char_u *name, char_u *buffer, char *ext)
+{
+    if (STRLEN(name) > MAXPATHL - 14)
+	return FAIL;
+    vim_snprintf((char *)buffer, MAXPATHL, "bitmaps/%s.%s", name, ext);
+    if (do_in_runtimepath(buffer, 0, gfp_setname, buffer) == FAIL
+							    || *buffer == NUL)
+	return FAIL;
+    return OK;
+}
+
+# if !defined(FEAT_GUI_GTK) || defined(PROTO)
+/*
+ * Given the name of the "icon=" argument, try finding the bitmap file for the
+ * icon.  If it is an absolute path name, use it as it is.  Otherwise append
+ * "ext" and search for it in 'runtimepath'.
+ * The result is put in "buffer[MAXPATHL]".  If something fails "buffer"
+ * contains "name".
+ */
+    void
+gui_find_iconfile(char_u *name, char_u *buffer, char *ext)
+{
+    char_u	buf[MAXPATHL + 1];
+
+    expand_env(name, buffer, MAXPATHL);
+    if (!mch_isFullName(buffer) && gui_find_bitmap(buffer, buf, ext) == OK)
+	STRCPY(buffer, buf);
+}
+# endif
+#endif
+
+#if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11)|| defined(FEAT_GUI_HAIKU) \
+	|| defined(PROTO)
+    void
+display_errors(void)
+{
+    char_u	*p;
+
+    if (isatty(2))
+	fflush(stderr);
+    else if (error_ga.ga_data != NULL)
+    {
+	// avoid putting up a message box with blanks only
+	for (p = (char_u *)error_ga.ga_data; *p != NUL; ++p)
+	    if (!isspace(*p))
+	    {
+		// Truncate a very long message, it will go off-screen.
+		if (STRLEN(p) > 2000)
+		    STRCPY(p + 2000 - 14, "...(truncated)");
+		(void)do_dialog(VIM_ERROR, (char_u *)_("Error"),
+				       p, (char_u *)_("&Ok"), 1, NULL, FALSE);
+		break;
+	    }
+	ga_clear(&error_ga);
+    }
+}
+#endif
+
+#if defined(NO_CONSOLE_INPUT) || defined(PROTO)
+/*
+ * Return TRUE if still starting up and there is no place to enter text.
+ * For GTK and X11 we check if stderr is not a tty, which means we were
+ * (probably) started from the desktop.  Also check stdin, "vim >& file" does
+ * allow typing on stdin.
+ */
+    int
+no_console_input(void)
+{
+    return ((!gui.in_use || gui.starting)
+# ifndef NO_CONSOLE
+	    && !isatty(0) && !isatty(2)
+# endif
+	    );
+}
+#endif
+
+#if defined(FIND_REPLACE_DIALOG) \
+	|| defined(NEED_GUI_UPDATE_SCREEN) \
+	|| defined(PROTO)
+/*
+ * Update the current window and the screen.
+ */
+    void
+gui_update_screen(void)
+{
+# ifdef FEAT_CONCEAL
+    linenr_T	conceal_old_cursor_line = 0;
+    linenr_T	conceal_new_cursor_line = 0;
+    int		conceal_update_lines = FALSE;
+# endif
+
+    update_topline();
+    validate_cursor();
+
+    // Trigger CursorMoved if the cursor moved.
+    if (!finish_op && (has_cursormoved()
+# ifdef FEAT_PROP_POPUP
+		|| popup_visible
+# endif
+# ifdef FEAT_CONCEAL
+		|| curwin->w_p_cole > 0
+# endif
+		) && !EQUAL_POS(last_cursormoved, curwin->w_cursor))
+    {
+	if (has_cursormoved())
+	    apply_autocmds(EVENT_CURSORMOVED, NULL, NULL, FALSE, curbuf);
+#ifdef FEAT_PROP_POPUP
+	if (popup_visible)
+	    popup_check_cursor_pos();
+#endif
+# ifdef FEAT_CONCEAL
+	if (curwin->w_p_cole > 0)
+	{
+	    conceal_old_cursor_line = last_cursormoved.lnum;
+	    conceal_new_cursor_line = curwin->w_cursor.lnum;
+	    conceal_update_lines = TRUE;
+	}
+# endif
+	last_cursormoved = curwin->w_cursor;
+    }
+
+# ifdef FEAT_CONCEAL
+    if (conceal_update_lines
+	    && (conceal_old_cursor_line != conceal_new_cursor_line
+		|| conceal_cursor_line(curwin)
+		|| need_cursor_line_redraw))
+    {
+	if (conceal_old_cursor_line != conceal_new_cursor_line)
+	    redrawWinline(curwin, conceal_old_cursor_line);
+	redrawWinline(curwin, conceal_new_cursor_line);
+	curwin->w_valid &= ~VALID_CROW;
+	need_cursor_line_redraw = FALSE;
+    }
+# endif
+    update_screen(0);	// may need to update the screen
+    setcursor();
+    out_flush_cursor(TRUE, FALSE);
+}
+#endif
+
+#if defined(FIND_REPLACE_DIALOG) || defined(PROTO)
+/*
+ * Get the text to use in a find/replace dialog.  Uses the last search pattern
+ * if the argument is empty.
+ * Returns an allocated string.
+ */
+    char_u *
+get_find_dialog_text(
+    char_u	*arg,
+    int		*wwordp,	// return: TRUE if \< \> found
+    int		*mcasep)	// return: TRUE if \C found
+{
+    char_u	*text;
+
+    if (*arg == NUL)
+	text = last_search_pat();
+    else
+	text = arg;
+    if (text != NULL)
+    {
+	text = vim_strsave(text);
+	if (text != NULL)
+	{
+	    int len = (int)STRLEN(text);
+	    int i;
+
+	    // Remove "\V"
+	    if (len >= 2 && STRNCMP(text, "\\V", 2) == 0)
+	    {
+		mch_memmove(text, text + 2, (size_t)(len - 1));
+		len -= 2;
+	    }
+
+	    // Recognize "\c" and "\C" and remove.
+	    if (len >= 2 && *text == '\\' && (text[1] == 'c' || text[1] == 'C'))
+	    {
+		*mcasep = (text[1] == 'C');
+		mch_memmove(text, text + 2, (size_t)(len - 1));
+		len -= 2;
+	    }
+
+	    // Recognize "\<text\>" and remove.
+	    if (len >= 4
+		    && STRNCMP(text, "\\<", 2) == 0
+		    && STRNCMP(text + len - 2, "\\>", 2) == 0)
+	    {
+		*wwordp = TRUE;
+		mch_memmove(text, text + 2, (size_t)(len - 4));
+		text[len - 4] = NUL;
+	    }
+
+	    // Recognize "\/" or "\?" and remove.
+	    for (i = 0; i + 1 < len; ++i)
+		if (text[i] == '\\' && (text[i + 1] == '/'
+						       || text[i + 1] == '?'))
+		{
+		    mch_memmove(text + i, text + i + 1, (size_t)(len - i));
+		    --len;
+		}
+	}
+    }
+    return text;
+}
+
+/*
+ * Handle the press of a button in the find-replace dialog.
+ * Return TRUE when something was added to the input buffer.
+ */
+    int
+gui_do_findrepl(
+    int		flags,		// one of FRD_REPLACE, FRD_FINDNEXT, etc.
+    char_u	*find_text,
+    char_u	*repl_text,
+    int		down)		// Search downwards.
+{
+    garray_T	ga;
+    int		i;
+    int		type = (flags & FRD_TYPE_MASK);
+    char_u	*p;
+    regmatch_T	regmatch;
+    int		save_did_emsg = did_emsg;
+    static int  busy = FALSE;
+
+    // When the screen is being updated we should not change buffers and
+    // windows structures, it may cause freed memory to be used.  Also don't
+    // do this recursively (pressing "Find" quickly several times.
+    if (updating_screen || busy)
+	return FALSE;
+
+    // refuse replace when text cannot be changed
+    if ((type == FRD_REPLACE || type == FRD_REPLACEALL) && text_locked())
+	return FALSE;
+
+    busy = TRUE;
+
+    ga_init2(&ga, 1, 100);
+    if (type == FRD_REPLACEALL)
+	ga_concat(&ga, (char_u *)"%s/");
+
+    ga_concat(&ga, (char_u *)"\\V");
+    if (flags & FRD_MATCH_CASE)
+	ga_concat(&ga, (char_u *)"\\C");
+    else
+	ga_concat(&ga, (char_u *)"\\c");
+    if (flags & FRD_WHOLE_WORD)
+	ga_concat(&ga, (char_u *)"\\<");
+    // escape slash and backslash
+    p = vim_strsave_escaped(find_text, (char_u *)"/\\");
+    if (p != NULL)
+        ga_concat(&ga, p);
+    vim_free(p);
+    if (flags & FRD_WHOLE_WORD)
+	ga_concat(&ga, (char_u *)"\\>");
+
+    if (type == FRD_REPLACEALL)
+    {
+	ga_concat(&ga, (char_u *)"/");
+	// escape slash and backslash
+	p = vim_strsave_escaped(repl_text, (char_u *)"/\\");
+	if (p != NULL)
+	    ga_concat(&ga, p);
+	vim_free(p);
+	ga_concat(&ga, (char_u *)"/g");
+    }
+    ga_append(&ga, NUL);
+
+    if (type == FRD_REPLACE)
+    {
+	// Do the replacement when the text at the cursor matches.  Thus no
+	// replacement is done if the cursor was moved!
+	regmatch.regprog = vim_regcomp(ga.ga_data, RE_MAGIC + RE_STRING);
+	regmatch.rm_ic = 0;
+	if (regmatch.regprog != NULL)
+	{
+	    p = ml_get_cursor();
+	    if (vim_regexec_nl(&regmatch, p, (colnr_T)0)
+						   && regmatch.startp[0] == p)
+	    {
+		// Clear the command line to remove any old "No match"
+		// error.
+		msg_end_prompt();
+
+		if (u_save_cursor() == OK)
+		{
+		    // A button was pressed thus undo should be synced.
+		    u_sync(FALSE);
+
+		    del_bytes((long)(regmatch.endp[0] - regmatch.startp[0]),
+								FALSE, FALSE);
+		    ins_str(repl_text);
+		}
+	    }
+	    else
+		msg(_("No match at cursor, finding next"));
+	    vim_regfree(regmatch.regprog);
+	}
+    }
+
+    if (type == FRD_REPLACEALL)
+    {
+	// A button was pressed, thus undo should be synced.
+	u_sync(FALSE);
+	do_cmdline_cmd(ga.ga_data);
+    }
+    else
+    {
+	int searchflags = SEARCH_MSG + SEARCH_MARK;
+
+	// Search for the next match.
+	// Don't skip text under cursor for single replace.
+	if (type == FRD_REPLACE)
+	    searchflags += SEARCH_START;
+	i = msg_scroll;
+	if (down)
+	{
+	    (void)do_search(NULL, '/', '/', ga.ga_data, 1L, searchflags, NULL);
+	}
+	else
+	{
+	    // We need to escape '?' if and only if we are searching in the up
+	    // direction
+	    p = vim_strsave_escaped(ga.ga_data, (char_u *)"?");
+	    if (p != NULL)
+	        (void)do_search(NULL, '?', '?', p, 1L, searchflags, NULL);
+	    vim_free(p);
+	}
+
+	msg_scroll = i;	    // don't let an error message set msg_scroll
+    }
+
+    // Don't want to pass did_emsg to other code, it may cause disabling
+    // syntax HL if we were busy redrawing.
+    did_emsg = save_did_emsg;
+
+    if (State & (NORMAL | INSERT))
+    {
+	gui_update_screen();		// update the screen
+	msg_didout = 0;			// overwrite any message
+	need_wait_return = FALSE;	// don't wait for return
+    }
+
+    vim_free(ga.ga_data);
+    busy = FALSE;
+    return (ga.ga_len > 0);
+}
+
+#endif
+
+#if defined(HAVE_DROP_FILE) || defined(PROTO)
+/*
+ * Jump to the window at specified point (x, y).
+ */
+    static void
+gui_wingoto_xy(int x, int y)
+{
+    int		row = Y_2_ROW(y);
+    int		col = X_2_COL(x);
+    win_T	*wp;
+
+    if (row >= 0 && col >= 0)
+    {
+	wp = mouse_find_win(&row, &col, FAIL_POPUP);
+	if (wp != NULL && wp != curwin)
+	    win_goto(wp);
+    }
+}
+
+/*
+ * Function passed to handle_drop() for the actions to be done after the
+ * argument list has been updated.
+ */
+    static void
+drop_callback(void *cookie)
+{
+    char_u	*p = cookie;
+
+    // If Shift held down, change to first file's directory.  If the first
+    // item is a directory, change to that directory (and let the explorer
+    // plugin show the contents).
+    if (p != NULL)
+    {
+	if (mch_isdir(p))
+	{
+	    if (mch_chdir((char *)p) == 0)
+		shorten_fnames(TRUE);
+	}
+	else if (vim_chdirfile(p, "drop") == OK)
+	    shorten_fnames(TRUE);
+	vim_free(p);
+    }
+
+    // Update the screen display
+    update_screen(NOT_VALID);
+# ifdef FEAT_MENU
+    gui_update_menus(0);
+# endif
+#ifdef FEAT_TITLE
+    maketitle();
+#endif
+    setcursor();
+    out_flush_cursor(FALSE, FALSE);
+}
+
+/*
+ * Process file drop.  Mouse cursor position, key modifiers, name of files
+ * and count of files are given.  Argument "fnames[count]" has full pathnames
+ * of dropped files, they will be freed in this function, and caller can't use
+ * fnames after call this function.
+ */
+    void
+gui_handle_drop(
+    int		x UNUSED,
+    int		y UNUSED,
+    int_u	modifiers,
+    char_u	**fnames,
+    int		count)
+{
+    int		i;
+    char_u	*p;
+    static int	entered = FALSE;
+
+    /*
+     * This function is called by event handlers.  Just in case we get a
+     * second event before the first one is handled, ignore the second one.
+     * Not sure if this can ever happen, just in case.
+     */
+    if (entered)
+	return;
+    entered = TRUE;
+
+    /*
+     * When the cursor is at the command line, add the file names to the
+     * command line, don't edit the files.
+     */
+    if (State & CMDLINE)
+    {
+	shorten_filenames(fnames, count);
+	for (i = 0; i < count; ++i)
+	{
+	    if (fnames[i] != NULL)
+	    {
+		if (i > 0)
+		    add_to_input_buf((char_u*)" ", 1);
+
+		// We don't know what command is used thus we can't be sure
+		// about which characters need to be escaped.  Only escape the
+		// most common ones.
+# ifdef BACKSLASH_IN_FILENAME
+		p = vim_strsave_escaped(fnames[i], (char_u *)" \t\"|");
+# else
+		p = vim_strsave_escaped(fnames[i], (char_u *)"\\ \t\"|");
+# endif
+		if (p != NULL)
+		    add_to_input_buf_csi(p, (int)STRLEN(p));
+		vim_free(p);
+		vim_free(fnames[i]);
+	    }
+	}
+	vim_free(fnames);
+    }
+    else
+    {
+	// Go to the window under mouse cursor, then shorten given "fnames" by
+	// current window, because a window can have local current dir.
+	gui_wingoto_xy(x, y);
+	shorten_filenames(fnames, count);
+
+	// If Shift held down, remember the first item.
+	if ((modifiers & MOUSE_SHIFT) != 0)
+	    p = vim_strsave(fnames[0]);
+	else
+	    p = NULL;
+
+	// Handle the drop, :edit or :split to get to the file.  This also
+	// frees fnames[].  Skip this if there is only one item, it's a
+	// directory and Shift is held down.
+	if (count == 1 && (modifiers & MOUSE_SHIFT) != 0
+						     && mch_isdir(fnames[0]))
+	{
+	    vim_free(fnames[0]);
+	    vim_free(fnames);
+	}
+	else
+	    handle_drop(count, fnames, (modifiers & MOUSE_CTRL) != 0,
+		    drop_callback, (void *)p);
+    }
+
+    entered = FALSE;
+}
+#endif
+
+/*
+ * Check if "key" is to interrupt us.  Handles a key that has not had modifiers
+ * applied yet.
+ * Return the key with modifiers applied if so, NUL if not.
+ */
+    int
+check_for_interrupt(int key, int modifiers_arg)
+{
+    int modifiers = modifiers_arg;
+    int c = merge_modifyOtherKeys(key, &modifiers);
+
+    if ((c == Ctrl_C && ctrl_c_interrupts)
+#ifdef UNIX
+	    || (intr_char != Ctrl_C && c == intr_char)
+#endif
+	    )
+    {
+	got_int = TRUE;
+	return c;
+    }
+    return NUL;
+}
+