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Diffstat (limited to '')
-rw-r--r-- | src/viewer/mcviewer.c | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/src/viewer/mcviewer.c b/src/viewer/mcviewer.c new file mode 100644 index 0000000..0fdf2b7 --- /dev/null +++ b/src/viewer/mcviewer.c @@ -0,0 +1,467 @@ +/* + Internal file viewer for the Midnight Commander + Interface functions + + Copyright (C) 1994-2022 + Free Software Foundation, Inc + + Written by: + Miguel de Icaza, 1994, 1995, 1998 + Janne Kukonlehto, 1994, 1995 + Jakub Jelinek, 1995 + Joseph M. Hinkle, 1996 + Norbert Warmuth, 1997 + Pavel Machek, 1998 + Roland Illig <roland.illig@gmx.de>, 2004, 2005 + Slava Zanko <slavazanko@google.com>, 2009, 2013 + Andrew Borodin <aborodin@vmail.ru>, 2009-2022 + Ilia Maslakov <il.smind@gmail.com>, 2009 + + This file is part of the Midnight Commander. + + The Midnight Commander is free software: you can redistribute it + and/or modify it under the terms of the GNU General Public License as + published by the Free Software Foundation, either version 3 of the License, + or (at your option) any later version. + + The Midnight Commander is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <errno.h> + +#include "lib/global.h" +#include "lib/tty/tty.h" +#include "lib/vfs/vfs.h" +#include "lib/strutil.h" +#include "lib/util.h" /* load_file_position() */ +#include "lib/widget.h" + +#include "src/filemanager/layout.h" +#include "src/filemanager/filemanager.h" /* the_menubar */ + +#include "internal.h" + +/*** global variables ****************************************************************************/ + +mcview_mode_flags_t mcview_global_flags = { + .wrap = TRUE, + .hex = FALSE, + .magic = TRUE, + .nroff = FALSE +}; + +mcview_mode_flags_t mcview_altered_flags = { + .wrap = FALSE, + .hex = FALSE, + .magic = FALSE, + .nroff = FALSE +}; + +gboolean mcview_remember_file_position = FALSE; + +/* Maxlimit for skipping updates */ +int mcview_max_dirt_limit = 10; + +/* Scrolling is done in pages or line increments */ +gboolean mcview_mouse_move_pages = TRUE; + +/* end of file will be showen from mcview_show_eof */ +char *mcview_show_eof = NULL; + +/*** file scope macro definitions ****************************************************************/ + +/*** file scope type declarations ****************************************************************/ + +/*** file scope variables ************************************************************************/ + +/* --------------------------------------------------------------------------------------------- */ +/*** file scope functions ************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +static void +mcview_mouse_callback (Widget * w, mouse_msg_t msg, mouse_event_t * event) +{ + WView *view = (WView *) w; + const WRect *r = &view->data_area; + gboolean ok = TRUE; + + switch (msg) + { + case MSG_MOUSE_DOWN: + if (mcview_is_in_panel (view)) + { + if (event->y == WIDGET (w->owner)->rect.y) + { + /* return MOU_UNHANDLED */ + event->result.abort = TRUE; + /* don't draw viewer over menu */ + ok = FALSE; + break; + } + + if (!widget_get_state (w, WST_FOCUSED)) + { + /* Grab focus */ + (void) change_panel (); + } + } + MC_FALLTHROUGH; + + case MSG_MOUSE_CLICK: + if (!view->mode_flags.wrap) + { + /* Scrolling left and right */ + int x; + + x = event->x + 1; /* FIXME */ + + if (x < r->cols * 1 / 4) + { + mcview_move_left (view, 1); + event->result.repeat = msg == MSG_MOUSE_DOWN; + } + else if (x < r->cols * 3 / 4) + { + /* ignore the click */ + ok = FALSE; + } + else + { + mcview_move_right (view, 1); + event->result.repeat = msg == MSG_MOUSE_DOWN; + } + } + else + { + /* Scrolling up and down */ + int y; + + y = event->y + 1; /* FIXME */ + + if (y < r->y + r->lines * 1 / 3) + { + if (mcview_mouse_move_pages) + mcview_move_up (view, r->lines / 2); + else + mcview_move_up (view, 1); + + event->result.repeat = msg == MSG_MOUSE_DOWN; + } + else if (y < r->y + r->lines * 2 / 3) + { + /* ignore the click */ + ok = FALSE; + } + else + { + if (mcview_mouse_move_pages) + mcview_move_down (view, r->lines / 2); + else + mcview_move_down (view, 1); + + event->result.repeat = msg == MSG_MOUSE_DOWN; + } + } + break; + + case MSG_MOUSE_SCROLL_UP: + mcview_move_up (view, 2); + break; + + case MSG_MOUSE_SCROLL_DOWN: + mcview_move_down (view, 2); + break; + + default: + ok = FALSE; + break; + } + + if (ok) + mcview_update (view); +} + +/* --------------------------------------------------------------------------------------------- */ +/*** public functions ****************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +WView * +mcview_new (int y, int x, int lines, int cols, gboolean is_panel) +{ + WRect r = { y, x, lines, cols }; + WView *view; + Widget *w; + + view = g_new0 (WView, 1); + w = WIDGET (view); + + widget_init (w, &r, mcview_callback, mcview_mouse_callback); + w->options |= WOP_SELECTABLE | WOP_TOP_SELECT; + w->keymap = viewer_map; + + mcview_clear_mode_flags (&view->mode_flags); + view->hexedit_mode = FALSE; + view->hex_keymap = viewer_hex_map; + view->hexview_in_text = FALSE; + view->locked = FALSE; + + view->dpy_frame_size = is_panel ? 1 : 0; + view->converter = str_cnv_from_term; + + mcview_init (view); + + if (mcview_global_flags.hex) + mcview_toggle_hex_mode (view); + if (mcview_global_flags.nroff) + mcview_toggle_nroff_mode (view); + if (mcview_global_flags.wrap) + mcview_toggle_wrap_mode (view); + if (mcview_global_flags.magic) + mcview_toggle_magic_mode (view); + + return view; +} + +/* --------------------------------------------------------------------------------------------- */ +/** Real view only */ + +gboolean +mcview_viewer (const char *command, const vfs_path_t * file_vpath, int start_line, + off_t search_start, off_t search_end) +{ + gboolean succeeded; + WView *lc_mcview; + WDialog *view_dlg; + Widget *vw, *b; + WGroup *g; + + /* Create dialog and widgets, put them on the dialog */ + view_dlg = dlg_create (FALSE, 0, 0, 1, 1, WPOS_FULLSCREEN, FALSE, NULL, mcview_dialog_callback, + NULL, "[Internal File Viewer]", NULL); + vw = WIDGET (view_dlg); + widget_want_tab (vw, TRUE); + + g = GROUP (view_dlg); + + lc_mcview = mcview_new (vw->rect.y, vw->rect.x, vw->rect.lines - 1, vw->rect.cols, FALSE); + group_add_widget_autopos (g, lc_mcview, WPOS_KEEP_ALL, NULL); + + b = WIDGET (buttonbar_new ()); + group_add_widget_autopos (g, b, b->pos_flags, NULL); + + view_dlg->get_title = mcview_get_title; + + succeeded = + mcview_load (lc_mcview, command, vfs_path_as_str (file_vpath), start_line, search_start, + search_end); + + if (succeeded) + dlg_run (view_dlg); + else + dlg_stop (view_dlg); + + if (widget_get_state (vw, WST_CLOSED)) + widget_destroy (vw); + + return succeeded; +} + +/* {{{ Miscellaneous functions }}} */ + +/* --------------------------------------------------------------------------------------------- */ + +gboolean +mcview_load (WView * view, const char *command, const char *file, int start_line, + off_t search_start, off_t search_end) +{ + gboolean retval = FALSE; + vfs_path_t *vpath = NULL; + + g_assert (view->bytes_per_line != 0); + + view->filename_vpath = vfs_path_from_str (file); + + /* get working dir */ + if (file != NULL && file[0] != '\0') + { + vfs_path_free (view->workdir_vpath, TRUE); + + if (!g_path_is_absolute (file)) + { + vfs_path_t *p; + + p = vfs_path_clone (vfs_get_raw_current_dir ()); + view->workdir_vpath = vfs_path_append_new (p, file, (char *) NULL); + vfs_path_free (p, TRUE); + } + else + { + /* try extract path from filename */ + const char *fname; + char *dir; + + fname = x_basename (file); + dir = g_strndup (file, (size_t) (fname - file)); + view->workdir_vpath = vfs_path_from_str (dir); + g_free (dir); + } + } + + if (!mcview_is_in_panel (view)) + view->dpy_text_column = 0; + +#ifdef HAVE_CHARSET + mcview_set_codeset (view); +#endif + + if (command != NULL && (view->mode_flags.magic || file == NULL || file[0] == '\0')) + retval = mcview_load_command_output (view, command); + else if (file != NULL && file[0] != '\0') + { + int fd; + char tmp[BUF_MEDIUM]; + struct stat st; + + /* Open the file */ + vpath = vfs_path_from_str (file); + fd = mc_open (vpath, O_RDONLY | O_NONBLOCK); + if (fd == -1) + { + g_snprintf (tmp, sizeof (tmp), _("Cannot open \"%s\"\n%s"), + file, unix_error_string (errno)); + mcview_close_datasource (view); + mcview_show_error (view, tmp); + vfs_path_free (view->filename_vpath, TRUE); + view->filename_vpath = NULL; + vfs_path_free (view->workdir_vpath, TRUE); + view->workdir_vpath = NULL; + goto finish; + } + + /* Make sure we are working with a regular file */ + if (mc_fstat (fd, &st) == -1) + { + mc_close (fd); + g_snprintf (tmp, sizeof (tmp), _("Cannot stat \"%s\"\n%s"), + file, unix_error_string (errno)); + mcview_close_datasource (view); + mcview_show_error (view, tmp); + vfs_path_free (view->filename_vpath, TRUE); + view->filename_vpath = NULL; + vfs_path_free (view->workdir_vpath, TRUE); + view->workdir_vpath = NULL; + goto finish; + } + + if (!S_ISREG (st.st_mode)) + { + mc_close (fd); + mcview_close_datasource (view); + mcview_show_error (view, _("Cannot view: not a regular file")); + vfs_path_free (view->filename_vpath, TRUE); + view->filename_vpath = NULL; + vfs_path_free (view->workdir_vpath, TRUE); + view->workdir_vpath = NULL; + goto finish; + } + + if (st.st_size == 0 || mc_lseek (fd, 0, SEEK_SET) == -1) + { + /* Must be one of those nice files that grow (/proc) */ + mcview_set_datasource_vfs_pipe (view, fd); + } + else + { + if (view->mode_flags.magic) + { + int type; + + type = get_compression_type (fd, file); + + if (type != COMPRESSION_NONE) + { + char *tmp_filename; + vfs_path_t *vpath1; + int fd1; + + tmp_filename = g_strconcat (file, decompress_extension (type), (char *) NULL); + vpath1 = vfs_path_from_str (tmp_filename); + g_free (tmp_filename); + fd1 = mc_open (vpath1, O_RDONLY | O_NONBLOCK); + vfs_path_free (vpath1, TRUE); + + if (fd1 == -1) + { + g_snprintf (tmp, sizeof (tmp), _("Cannot open \"%s\" in parse mode\n%s"), + file, unix_error_string (errno)); + mcview_close_datasource (view); + mcview_show_error (view, tmp); + } + else + { + mc_close (fd); + fd = fd1; + mc_fstat (fd, &st); + } + } + } + + mcview_set_datasource_file (view, fd, &st); + } + retval = TRUE; + } + + finish: + view->command = g_strdup (command); + view->dpy_start = 0; + view->dpy_paragraph_skip_lines = 0; + mcview_state_machine_init (&view->dpy_state_top, 0); + view->dpy_wrap_dirty = FALSE; + view->force_max = -1; + view->dpy_text_column = 0; + + mcview_compute_areas (view); + mcview_update_bytes_per_line (view); + + if (mcview_remember_file_position && view->filename_vpath != NULL && start_line == 0) + { + long line, col; + off_t new_offset, max_offset; + + load_file_position (view->filename_vpath, &line, &col, &new_offset, &view->saved_bookmarks); + max_offset = mcview_get_filesize (view) - 1; + if (max_offset < 0) + new_offset = 0; + else + new_offset = MIN (new_offset, max_offset); + if (!view->mode_flags.hex) + { + view->dpy_start = mcview_bol (view, new_offset, 0); + view->dpy_wrap_dirty = TRUE; + } + else + { + view->dpy_start = new_offset - new_offset % view->bytes_per_line; + view->hex_cursor = new_offset; + } + } + else if (start_line > 0) + mcview_moveto (view, start_line - 1, 0); + + view->search_start = search_start; + view->search_end = search_end; + view->hexedit_lownibble = FALSE; + view->hexview_in_text = FALSE; + view->change_list = NULL; + vfs_path_free (vpath, TRUE); + return retval; +} + +/* --------------------------------------------------------------------------------------------- */ |