mirror of
https://github.com/MidnightCommander/mc
synced 2024-12-23 21:06:52 +03:00
411 lines
8.8 KiB
C
411 lines
8.8 KiB
C
/* Module for creating a shaped window with text (for desktop icons)
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*
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* Copyright (C) 1998 the Free Software Foundation
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*
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* Author: Federico Mena <federico@nuclecu.unam.mx>
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*/
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#include <gnome.h>
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#include <string.h>
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#include "gdesktop.h"
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#include "gcache.h"
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#include <gdk/gdkx.h>
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/* The spacing between the cute little icon and the text */
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#define SPACING 2
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int want_transparent_icons = 1;
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int want_transparent_text = 0;
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/* Most of the word-wrapping code was yanked from the gtktooltips
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* module in Gtk+. I have tweaked it a bit for MC's purposes
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* - Federico
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*/
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struct text_info {
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GList *rows;
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GdkFont *font;
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int width;
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int height;
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int baseline_skip;
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};
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static void
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free_string (gpointer data, gpointer user_data)
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{
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if (data)
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g_free (data);
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}
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static void
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text_info_free (struct text_info *ti)
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{
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g_list_foreach (ti->rows, free_string, NULL);
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g_list_free (ti->rows);
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g_free (ti);
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}
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static struct text_info *
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layout_text (GtkWidget *widget, char *text)
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{
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struct text_info *ti;
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char *row_end, *row_text, *break_pos;
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int i, row_width, window_width;
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size_t len;
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ti = g_new (struct text_info, 1);
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ti->rows = NULL;
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ti->font = widget->style->font;
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ti->width = 0;
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ti->height = 0;
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ti->baseline_skip = ti->font->ascent + ti->font->descent;
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window_width = 0;
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while (*text) {
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row_end = strchr (text, '\n');
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if (!row_end)
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row_end = strchr (text, '\0');
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len = row_end - text + 1;
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row_text = g_new (char, len);
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memcpy (row_text, text, len - 1);
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row_text[len - 1] = '\0';
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/* Adjust the window's width or shorten the row until
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* it fits in the window.
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*/
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while (1) {
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row_width = gdk_string_width (ti->font, row_text);
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if (!window_width) {
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/* make an initial guess at window's width */
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if (row_width > SNAP_X)
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window_width = SNAP_X;
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else
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window_width = row_width;
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}
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if (row_width <= window_width)
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break;
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if (strchr (row_text, ' ')) {
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/* the row is currently too wide, but we have
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* blanks in the row so we can break it into
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* smaller pieces
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*/
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int avg_width = row_width / strlen (row_text);
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i = window_width;
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if (avg_width != 0)
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i /= avg_width;
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if ((size_t) i >= len)
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i = len - 1;
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break_pos = strchr (row_text + i, ' ');
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if (!break_pos) {
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break_pos = row_text+ i;
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while (*--break_pos != ' ');
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}
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*break_pos = '\0';
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} else {
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/* We can't break this row into any smaller
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* pieces, so we have no choice but to widen
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* the window
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*
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* For MC, we may want to modify the code above
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* so that it can also split the string on the
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* slahes of filenames.
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*/
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window_width = row_width;
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break;
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}
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}
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if (row_width > ti->width)
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ti->width = row_width;
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ti->rows = g_list_append (ti->rows, row_text);
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ti->height += ti->baseline_skip;
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text += strlen (row_text);
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if (!*text)
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break;
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if (text[0] == '\n' && text[1]) {
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/* end of paragraph and there is more text to come */
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ti->rows = g_list_append (ti->rows, NULL);
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ti->height += ti->baseline_skip / 2;
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}
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text++; /* skip blank or newline */
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}
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return ti;
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}
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static void
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paint_text (struct text_info *ti, GdkDrawable *drawable, GdkGC *gc, int x_ofs, int y_ofs)
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{
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int y, w;
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GList *item;
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y = y_ofs + ti->font->ascent;
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for (item = ti->rows; item; item = item->next) {
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if (item->data) {
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w = gdk_string_width (ti->font, item->data);
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gdk_draw_string (drawable, ti->font, gc, x_ofs + (ti->width - w) / 2, y, item->data);
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y += ti->baseline_skip;
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} else
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y += ti->baseline_skip / 2;
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}
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}
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static void
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set_window_text (GtkWidget *window, GdkImlibImage *im, char *text)
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{
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GdkPixmap *pixmap;
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GdkPixmap *im_pixmap;
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GdkBitmap *mask;
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GdkBitmap *im_mask;
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struct text_info *ti;
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GdkColor color;
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GdkGC *p_gc, *m_gc;
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int width, height;
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ti = layout_text (window, text);
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width = MAX (ti->width, im->rgb_width);
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height = im->rgb_height + SPACING + ti->height;
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/* Create pixmap, mask, and gc's */
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pixmap = gdk_pixmap_new (window->window, width, height, gdk_imlib_get_visual ()->depth);
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mask = gdk_pixmap_new (window->window, width, height, 1);
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p_gc = gdk_gc_new (pixmap);
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m_gc = gdk_gc_new (mask);
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/* Fill mask with transparent */
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color.pixel = 0;
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gdk_gc_set_foreground (m_gc, &color);
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gdk_draw_rectangle (mask,
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m_gc,
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TRUE,
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0, 0,
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width, height);
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/* Icon */
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im_pixmap = gdk_imlib_move_image (im);
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im_mask = gdk_imlib_move_mask (im);
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if (!want_transparent_icons || im_mask == NULL) {
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/* black background */
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gdk_color_black (gdk_imlib_get_colormap (), &color);
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gdk_gc_set_foreground (p_gc, &color);
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gdk_draw_rectangle (pixmap,
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p_gc,
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TRUE,
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(width - im->rgb_width) / 2,
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0,
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im->rgb_width,
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im->rgb_height);
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/* opaque mask */
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color.pixel = 1;
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gdk_gc_set_foreground (m_gc, &color);
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gdk_draw_rectangle (mask,
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m_gc,
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TRUE,
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(width - im->rgb_width) / 2,
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0,
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im->rgb_width,
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im->rgb_height);
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} else if (im_mask)
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gdk_draw_pixmap (mask,
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m_gc,
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im_mask,
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0, 0,
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(width - im->rgb_width) / 2,
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0,
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im->rgb_width,
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im->rgb_height);
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if (im_mask) {
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gdk_gc_set_clip_mask (p_gc, im_mask);
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gdk_gc_set_clip_origin (p_gc, (width - im->rgb_width) / 2, 0);
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}
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gdk_draw_pixmap (pixmap,
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p_gc,
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im_pixmap,
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0, 0,
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(width - im->rgb_width) / 2,
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0,
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im->rgb_width,
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im->rgb_height);
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if (im_mask) {
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gdk_gc_set_clip_mask (p_gc, NULL);
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gdk_imlib_free_bitmap (im_mask);
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}
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gdk_imlib_free_pixmap (im_pixmap);
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/* Text */
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if (!want_transparent_text) {
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/* black background */
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gdk_color_black (gdk_imlib_get_colormap (), &color);
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gdk_gc_set_foreground (p_gc, &color);
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gdk_draw_rectangle (pixmap,
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p_gc,
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TRUE,
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(width - ti->width) / 2,
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im->rgb_height + SPACING,
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ti->width,
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ti->height);
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/* opaque mask */
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color.pixel = 1;
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gdk_gc_set_foreground (m_gc, &color);
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gdk_draw_rectangle (mask,
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m_gc,
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TRUE,
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(width - ti->width) / 2,
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im->rgb_height + SPACING,
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ti->width,
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ti->height);
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} else {
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color.pixel = 1;
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gdk_gc_set_foreground (m_gc, &color);
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paint_text (ti, mask, m_gc,
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(width - ti->width) / 2,
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im->rgb_height + SPACING);
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}
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gdk_color_white (gdk_imlib_get_colormap (), &color);
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gdk_gc_set_foreground (p_gc, &color);
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paint_text (ti, pixmap, p_gc,
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(width - ti->width) / 2,
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im->rgb_height + SPACING);
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/* Set contents of window */
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gtk_widget_set_usize (window, width, height);
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gdk_window_set_back_pixmap (window->window, pixmap, FALSE);
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gdk_window_shape_combine_mask (window->window, mask, 0, 0);
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gdk_gc_destroy (p_gc);
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gdk_gc_destroy (m_gc);
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gdk_pixmap_unref (pixmap);
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gdk_pixmap_unref (mask);
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text_info_free (ti);
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}
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static void
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lower_icon_window(GtkWidget *widget, GdkEventExpose *event)
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{
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gdk_window_lower(widget->window);
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}
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GtkWidget *
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create_transparent_text_window (char *file, char *text, int extra_events)
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{
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GtkWidget *window;
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GdkImlibImage *im;
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GdkCursor *cursor;
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if (!g_file_exists (file))
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return NULL;
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im = image_cache_load_image (file);
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if (!im)
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return NULL;
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gtk_widget_push_visual (gdk_imlib_get_visual ());
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gtk_widget_push_colormap (gdk_imlib_get_colormap ());
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window = gtk_window_new (GTK_WINDOW_POPUP);
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gtk_widget_set_events (window, gtk_widget_get_events (window) | extra_events);
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gtk_widget_pop_colormap ();
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gtk_widget_pop_visual ();
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gtk_widget_realize (window);
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gdk_imlib_render (im, im->rgb_width, im->rgb_height);
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set_window_text (window, im, text);
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cursor = gdk_cursor_new (GDK_TOP_LEFT_ARROW);
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gdk_window_set_cursor (window->window, cursor);
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gdk_cursor_destroy (cursor);
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/* We do this so the desktop icons appear to really be part of the
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desktop */
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gtk_signal_connect(window, "expose_event", GTK_SIGNAL_FUNC(lower_icon_window), NULL);
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return window;
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}
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GtkWidget *
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make_transparent_window (char *file)
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{
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GdkImlibImage *im;
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GtkWidget *window;
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XSetWindowAttributes xwa;
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if (!g_file_exists (file))
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return NULL;
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im = image_cache_load_image (file);
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if (!im)
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return NULL;
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gtk_widget_push_visual (gdk_imlib_get_visual ());
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gtk_widget_push_colormap (gdk_imlib_get_colormap ());
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window = gtk_window_new (GTK_WINDOW_POPUP);
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gtk_widget_pop_colormap ();
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gtk_widget_pop_visual ();
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gtk_widget_realize (window);
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xwa.save_under = True;
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XChangeWindowAttributes (GDK_WINDOW_XDISPLAY (window->window),
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GDK_WINDOW_XWINDOW (window->window),
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CWSaveUnder, &xwa);
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gtk_widget_set_usize (window, im->rgb_width, im->rgb_height);
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/* All of the following 3 lines should not be required, only
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* gdk_imlib_apply_image, but is is buggy.
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*/
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gdk_imlib_render (im, im->rgb_width, im->rgb_height);
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gdk_window_set_back_pixmap (window->window, gdk_imlib_move_image (im), FALSE);
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gdk_window_shape_combine_mask (window->window, gdk_imlib_move_mask (im), 0, 0);
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return window;
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}
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