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/*
* Copyright 2015 Javier S. Pedro <dev.git@javispedro.com>
*
* This file is part of MDock.
*
* MDock 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.
*
* MDock 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MDock. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gdk/gdkx.h>
#include "thumbnailer.h"
#define THUMBNAIL_MAX_WIDTH 196
#define THUMBNAIL_MAX_HEIGHT 196
typedef struct _ThumbnailData
{
GdkPixmap * pix;
guint update_source;
time_t timestamp;
} ThumbnailData;
G_DEFINE_QUARK(mdock-thumbnail-data, mdock_thumbnail_data)
static inline ThumbnailData * thumbnail_data_new()
{
return g_slice_new0(ThumbnailData);
}
static void thumbnail_data_destroy(ThumbnailData *tdata)
{
g_clear_object(&tdata->pix);
if (tdata->update_source) g_source_remove(tdata->update_source);
g_slice_free(ThumbnailData, tdata);
}
void thumbnailer_enable_for_window(WnckWindow *window)
{
g_object_set_qdata_full(G_OBJECT(window),
mdock_thumbnail_data_quark(),
thumbnail_data_new(),
(GDestroyNotify)thumbnail_data_destroy);
}
static gboolean thumbnailer_do_update(gpointer data)
{
ThumbnailData *tdata = g_object_get_qdata(G_OBJECT(data), mdock_thumbnail_data_quark());
g_return_val_if_fail(tdata, G_SOURCE_REMOVE);
thumbnailer_update_thumbnail(WNCK_WINDOW(data));
tdata->update_source = 0;
return G_SOURCE_REMOVE;
}
void thumbnailer_schedule_update(WnckWindow *window)
{
ThumbnailData *tdata = g_object_get_qdata(G_OBJECT(window), mdock_thumbnail_data_quark());
g_return_if_fail(tdata);
if (!tdata->update_source) {
tdata->update_source = g_timeout_add(500, thumbnailer_do_update, window);
}
}
void thumbnailer_update_thumbnail(WnckWindow *window)
{
GdkDisplay *display = gdk_display_get_default();
GdkScreen *screen = gdk_display_get_default_screen(display);
ThumbnailData *tdata = g_object_get_qdata(G_OBJECT(window), mdock_thumbnail_data_quark());
g_return_if_fail(tdata);
g_return_if_fail(wnck_window_is_active(window));
GdkWindow *root = gdk_get_default_root_window();
gdouble scale = MAX(gdk_screen_get_resolution(screen), 96.0) / 96.0;
const gint max_w = THUMBNAIL_MAX_WIDTH * scale,
max_h = THUMBNAIL_MAX_HEIGHT * scale;
int screen_x, screen_y, win_x, win_y, win_w, win_h, thumb_w, thumb_h, cur_w, cur_h;
gdk_window_get_origin(root, &screen_x, &screen_y);
wnck_window_get_client_window_geometry(window, &win_x, &win_y, &win_w, &win_h);
if (win_w > max_w || win_h > max_h) {
if (win_h > win_w) {
thumb_w = (max_h * win_w) / win_h;
thumb_h = max_h;
} else {
thumb_w = max_w;
thumb_h = (max_w * win_h) / win_w;
}
} else {
thumb_w = win_w;
thumb_h = win_h;
}
if (tdata->pix) {
gdk_pixmap_get_size(tdata->pix, &cur_w, &cur_h);
}
if (!tdata->pix || cur_w != thumb_w || cur_h != thumb_h) {
g_clear_object(&tdata->pix);
g_debug("Recreating pixmap for %s (%dx%d)", wnck_window_get_name(window), thumb_w, thumb_h);
tdata->pix = gdk_pixmap_new(root, thumb_w, thumb_h, -1);
}
g_return_if_fail(tdata->pix);
g_debug("Updating thumbnail for %s (%dx%d)", wnck_window_get_name(window), thumb_w, thumb_h);
double scale_w = thumb_w / (double)win_w, scale_h = thumb_h / (double)win_h;
cairo_t *cr = gdk_cairo_create(GDK_DRAWABLE(tdata->pix));
cairo_scale(cr, scale_w, scale_h);
gdk_cairo_set_source_window(cr, root, -(win_x - screen_x), -(win_y - screen_y));
cairo_pattern_set_filter(cairo_get_source (cr), CAIRO_FILTER_FAST);
cairo_paint(cr);
cairo_destroy(cr);
time(&tdata->timestamp);
}
GdkPixmap * thumbnailer_get_thumbnail(WnckWindow *window)
{
ThumbnailData *tdata = g_object_get_qdata(G_OBJECT(window), mdock_thumbnail_data_quark());
g_return_val_if_fail(tdata, NULL);
return tdata->pix;
}
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