Adding upstream version 3:4.8.29.upstream/3%4.8.29upstream

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

1 files changed, 401 insertions, 0 deletions

diff --git a/src/viewer/display.c b/src/viewer/display.c
new file mode 100644
index 0000000..fe47ec5
--- /dev/null
+++ b/src/viewer/display.c
@@ -0,0 +1,401 @@
+/*
+   Internal file viewer for the Midnight Commander
+   Function for whow info on display
+
+   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
+   Andrew Borodin <aborodin@vmail.ru>, 2009-2022
+   Ilia Maslakov <il.smind@gmail.com>, 2009, 2010
+
+   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 <inttypes.h>           /* uintmax_t */
+
+#include "lib/global.h"
+#include "lib/skin.h"
+#include "lib/tty/tty.h"
+#include "lib/tty/key.h"
+#include "lib/strutil.h"
+#include "lib/util.h"
+#include "lib/widget.h"
+#ifdef HAVE_CHARSET
+#include "lib/charsets.h"
+#endif
+
+#include "src/setup.h"          /* panels_options */
+#include "src/keymap.h"
+
+#include "internal.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+#define BUF_TRUNC_LEN 5         /* The length of the line displays the file size */
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/* If set, show a ruler */
+static enum ruler_type
+{
+    RULER_NONE,
+    RULER_TOP,
+    RULER_BOTTOM
+} ruler = RULER_NONE;
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+/** Define labels and handlers for functional keys */
+
+static void
+mcview_set_buttonbar (WView * view)
+{
+    Widget *w = WIDGET (view);
+    WDialog *h = DIALOG (w->owner);
+    WButtonBar *b;
+    const global_keymap_t *keymap = view->mode_flags.hex ? view->hex_keymap : w->keymap;
+
+    b = find_buttonbar (h);
+    buttonbar_set_label (b, 1, Q_ ("ButtonBar|Help"), keymap, w);
+
+    if (view->mode_flags.hex)
+    {
+        if (view->hexedit_mode)
+            buttonbar_set_label (b, 2, Q_ ("ButtonBar|View"), keymap, w);
+        else if (view->datasource == DS_FILE)
+            buttonbar_set_label (b, 2, Q_ ("ButtonBar|Edit"), keymap, w);
+        else
+            buttonbar_set_label (b, 2, "", keymap, WIDGET (view));
+
+        buttonbar_set_label (b, 4, Q_ ("ButtonBar|Ascii"), keymap, w);
+        buttonbar_set_label (b, 6, Q_ ("ButtonBar|Save"), keymap, w);
+        buttonbar_set_label (b, 7, Q_ ("ButtonBar|HxSrch"), keymap, w);
+
+    }
+    else
+    {
+        buttonbar_set_label (b, 2, view->mode_flags.wrap ? Q_ ("ButtonBar|UnWrap")
+                             : Q_ ("ButtonBar|Wrap"), keymap, w);
+        buttonbar_set_label (b, 4, Q_ ("ButtonBar|Hex"), keymap, w);
+        buttonbar_set_label (b, 6, "", keymap, WIDGET (view));
+        buttonbar_set_label (b, 7, Q_ ("ButtonBar|Search"), keymap, w);
+    }
+
+    buttonbar_set_label (b, 5, Q_ ("ButtonBar|Goto"), keymap, w);
+    buttonbar_set_label (b, 8, view->mode_flags.magic ? Q_ ("ButtonBar|Raw")
+                         : Q_ ("ButtonBar|Parse"), keymap, w);
+
+    if (!mcview_is_in_panel (view))     /* don't override some panel buttonbar keys  */
+    {
+        buttonbar_set_label (b, 3, Q_ ("ButtonBar|Quit"), keymap, w);
+        buttonbar_set_label (b, 9, view->mode_flags.nroff ? Q_ ("ButtonBar|Unform")
+                             : Q_ ("ButtonBar|Format"), keymap, w);
+        buttonbar_set_label (b, 10, Q_ ("ButtonBar|Quit"), keymap, w);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mcview_display_percent (WView * view, off_t p)
+{
+    int percent;
+
+    percent = mcview_calc_percent (view, p);
+    if (percent >= 0)
+    {
+        int top = view->status_area.y;
+        int right;
+
+        right = view->status_area.x + view->status_area.cols;
+        widget_gotoyx (view, top, right - 4);
+        tty_printf ("%3d%%", percent);
+        /* avoid cursor wrapping in NCurses-base MC */
+        widget_gotoyx (view, top, right - 1);
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+mcview_display_status (WView * view)
+{
+    const WRect *r = &view->status_area;
+    const char *file_label;
+
+    if (r->lines < 1)
+        return;
+
+    tty_setcolor (STATUSBAR_COLOR);
+    tty_draw_hline (WIDGET (view)->rect.y + r->y, WIDGET (view)->rect.x + r->x, ' ', r->cols);
+
+    file_label =
+        view->filename_vpath != NULL ?
+        vfs_path_get_last_path_str (view->filename_vpath) : view->command != NULL ?
+        view->command : "";
+
+    if (r->cols > 40)
+    {
+        widget_gotoyx (view, r->y, r->cols - 32);
+        if (view->mode_flags.hex)
+            tty_printf ("0x%08" PRIxMAX, (uintmax_t) view->hex_cursor);
+        else
+        {
+            char buffer[BUF_TRUNC_LEN + 1];
+
+            size_trunc_len (buffer, BUF_TRUNC_LEN, mcview_get_filesize (view), 0,
+                            panels_options.kilobyte_si);
+            tty_printf ("%9" PRIuMAX "/%s%s %s", (uintmax_t) view->dpy_end,
+                        buffer, mcview_may_still_grow (view) ? "+" : " ",
+#ifdef HAVE_CHARSET
+                        mc_global.source_codepage >= 0 ?
+                        get_codepage_id (mc_global.source_codepage) :
+#endif
+                        "");
+        }
+    }
+    widget_gotoyx (view, r->y, r->x);
+    if (r->cols > 40)
+        tty_print_string (str_fit_to_term (file_label, r->cols - 34, J_LEFT_FIT));
+    else
+        tty_print_string (str_fit_to_term (file_label, r->cols - 5, J_LEFT_FIT));
+    if (r->cols > 26)
+        mcview_display_percent (view, view->mode_flags.hex ? view->hex_cursor : view->dpy_end);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mcview_update (WView * view)
+{
+    static int dirt_limit = 1;
+
+    if (view->dpy_bbar_dirty)
+    {
+        view->dpy_bbar_dirty = FALSE;
+        mcview_set_buttonbar (view);
+        widget_draw (WIDGET (find_buttonbar (DIALOG (WIDGET (view)->owner))));
+    }
+
+    if (view->dirty > dirt_limit)
+    {
+        /* Too many updates skipped -> force a update */
+        mcview_display (view);
+        view->dirty = 0;
+        /* Raise the update skipping limit */
+        dirt_limit++;
+        if (dirt_limit > mcview_max_dirt_limit)
+            dirt_limit = mcview_max_dirt_limit;
+    }
+    else if (view->dirty > 0)
+    {
+        if (is_idle ())
+        {
+            /* We have time to update the screen properly */
+            mcview_display (view);
+            view->dirty = 0;
+            if (dirt_limit > 1)
+                dirt_limit--;
+        }
+        else
+        {
+            /* We are busy -> skipping full update,
+               only the status line is updated */
+            mcview_display_status (view);
+        }
+        /* Here we had a refresh, if fast scrolling does not work
+           restore the refresh, although this should not happen */
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/** Displays as much data from view->dpy_start as fits on the screen */
+
+void
+mcview_display (WView * view)
+{
+    if (view->mode_flags.hex)
+        mcview_display_hex (view);
+    else
+        mcview_display_text (view);
+    mcview_display_status (view);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mcview_compute_areas (WView * view)
+{
+    WRect view_area;
+    int height, rest, y;
+
+    /* The viewer is surrounded by a frame of size view->dpy_frame_size.
+     * Inside that frame, there are: The status line (at the top),
+     * the data area and an optional ruler, which is shown above or
+     * below the data area. */
+
+    view_area.y = view->dpy_frame_size;
+    view_area.x = view->dpy_frame_size;
+    view_area.lines = DOZ (WIDGET (view)->rect.lines, 2 * view->dpy_frame_size);
+    view_area.cols = DOZ (WIDGET (view)->rect.cols, 2 * view->dpy_frame_size);
+
+    /* Most coordinates of the areas equal those of the whole viewer */
+    view->status_area = view_area;
+    view->ruler_area = view_area;
+    view->data_area = view_area;
+
+    /* Compute the heights of the areas */
+    rest = view_area.lines;
+
+    height = MIN (rest, 1);
+    view->status_area.lines = height;
+    rest -= height;
+
+    height = (ruler == RULER_NONE || view->mode_flags.hex) ? 0 : 2;
+    height = MIN (rest, height);
+    view->ruler_area.lines = height;
+    rest -= height;
+
+    view->data_area.lines = rest;
+
+    /* Compute the position of the areas */
+    y = view_area.y;
+
+    view->status_area.y = y;
+    y += view->status_area.lines;
+
+    if (ruler == RULER_TOP)
+    {
+        view->ruler_area.y = y;
+        y += view->ruler_area.lines;
+    }
+
+    view->data_area.y = y;
+    y += view->data_area.lines;
+
+    if (ruler == RULER_BOTTOM)
+        view->ruler_area.y = y;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mcview_update_bytes_per_line (WView * view)
+{
+    int cols = view->data_area.cols;
+    int bytes;
+
+    if (cols < 9 + 17)
+        bytes = 4;
+    else
+        bytes = 4 * ((cols - 9) / ((cols <= 80) ? 17 : 18));
+
+    g_assert (bytes != 0);
+
+    view->bytes_per_line = bytes;
+    view->dirty = mcview_max_dirt_limit + 1;    /* To force refresh */
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mcview_display_toggle_ruler (WView * view)
+{
+    static const enum ruler_type next[3] =
+    {
+        RULER_TOP,
+        RULER_BOTTOM,
+        RULER_NONE
+    };
+
+    g_assert ((size_t) ruler < 3);
+
+    ruler = next[(size_t) ruler];
+    mcview_compute_areas (view);
+    view->dirty++;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mcview_display_clean (WView * view)
+{
+    Widget *w = WIDGET (view);
+
+    tty_setcolor (VIEW_NORMAL_COLOR);
+    widget_erase (w);
+    if (view->dpy_frame_size != 0)
+        tty_draw_box (w->rect.y, w->rect.x, w->rect.lines, w->rect.cols, FALSE);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+void
+mcview_display_ruler (WView * view)
+{
+    static const char ruler_chars[] = "|----*----";
+    const WRect *r = &view->ruler_area;
+    const int line_row = (ruler == RULER_TOP) ? 0 : 1;
+    const int nums_row = (ruler == RULER_TOP) ? 1 : 0;
+
+    char r_buff[10];
+    off_t cl;
+    int c;
+
+    if (ruler == RULER_NONE || r->lines < 1)
+        return;
+
+    tty_setcolor (VIEW_BOLD_COLOR);
+    for (c = 0; c < r->cols; c++)
+    {
+        cl = view->dpy_text_column + c;
+        if (line_row < r->lines)
+        {
+            widget_gotoyx (view, r->y + line_row, r->x + c);
+            tty_print_char (ruler_chars[cl % 10]);
+        }
+
+        if ((cl != 0) && (cl % 10) == 0)
+        {
+            g_snprintf (r_buff, sizeof (r_buff), "%" PRIuMAX, (uintmax_t) cl);
+            if (nums_row < r->lines)
+            {
+                widget_gotoyx (view, r->y + nums_row, r->x + c - 1);
+                tty_print_string (r_buff);
+            }
+        }
+    }
+    tty_setcolor (VIEW_NORMAL_COLOR);
+}
+
+/* --------------------------------------------------------------------------------------------- */