fullscreen.c

Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。

/*
 * GQview
 * (C) 2004 John Ellis
 *
 * Author: John Ellis
 *
 * This software is released under the GNU General Public License (GNU GPL).
 * Please read the included file COPYING for more information.
 * This software comes with no warranty of any kind, use at your own risk!
 */


#include "gqview.h"
#include "fullscreen.h"

#include "image.h"
#include "ui_fileops.h"
#include "ui_menu.h"
#include "ui_misc.h"


enum {
	FULLSCREEN_CURSOR_HIDDEN = 1 << 0,
	FULLSCREEN_CURSOR_NORMAL = 1 << 1,
	FULLSCREEN_CURSOR_BUSY   = 1 << 2
};


/*
 *----------------------------------------------------------------------------
 * full screen functions
 *----------------------------------------------------------------------------
 */

static void clear_mouse_cursor(GtkWidget *widget, gint state)
{
	if (!widget->window) return;

	if (state & FULLSCREEN_CURSOR_BUSY)
		{
		GdkCursor *cursor;

		cursor = gdk_cursor_new(GDK_WATCH);
		gdk_window_set_cursor (widget->window, cursor);
		gdk_cursor_unref(cursor);
		}
	else if (state & FULLSCREEN_CURSOR_NORMAL)
		{
		gdk_window_set_cursor (widget->window, NULL);
		}
	else
		{
		GdkCursor *cursor;
		GdkPixmap *p;

		p = gdk_bitmap_create_from_data(widget->window, "\0\0\0", 1, 1);

		cursor = gdk_cursor_new_from_pixmap(p, p,
						    &widget->style->fg[GTK_STATE_ACTIVE],
						    &widget->style->bg[GTK_STATE_ACTIVE],
						    0, 0);

		gdk_window_set_cursor (widget->window, cursor);

		gdk_cursor_unref(cursor);
		g_object_unref(p);
		}
}

static gint fullscreen_hide_mouse_cb(gpointer data)
{
	FullScreenData *fs = data;

	if (fs->hide_mouse_id == -1) return FALSE;

	fs->cursor_state &= ~FULLSCREEN_CURSOR_NORMAL;
	if (!(fs->cursor_state & FULLSCREEN_CURSOR_BUSY)) clear_mouse_cursor(fs->window, fs->cursor_state);

	fs->hide_mouse_id = -1;
	return FALSE;
}

static void fullscreen_hide_mouse_disable(FullScreenData *fs)
{
	if (fs->hide_mouse_id != -1)
		{
		g_source_remove(fs->hide_mouse_id);
		fs->hide_mouse_id = -1;
		}
}

static void fullscreen_hide_mouse_reset(FullScreenData *fs)
{
	fullscreen_hide_mouse_disable(fs);
	fs->hide_mouse_id = g_timeout_add(FULL_SCREEN_HIDE_MOUSE_DELAY, fullscreen_hide_mouse_cb, fs);
}

static gint fullscreen_mouse_moved(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
{
	FullScreenData *fs = data;

	if (!(fs->cursor_state & FULLSCREEN_CURSOR_NORMAL))
		{
		fs->cursor_state |= FULLSCREEN_CURSOR_NORMAL;
		if (!(fs->cursor_state & FULLSCREEN_CURSOR_BUSY)) clear_mouse_cursor(fs->window, fs->cursor_state);
		}
	fullscreen_hide_mouse_reset(fs);

	return FALSE;
}

static void fullscreen_busy_mouse_disable(FullScreenData *fs)
{
	if (fs->busy_mouse_id != -1)
		{
		g_source_remove(fs->busy_mouse_id);
		fs->busy_mouse_id = -1;
		}
}

static void fullscreen_mouse_set_busy(FullScreenData *fs, gint busy)
{
	fullscreen_busy_mouse_disable(fs);

	if ((fs->cursor_state & FULLSCREEN_CURSOR_BUSY) == (busy)) return;

	if (busy)
		{
		fs->cursor_state |= FULLSCREEN_CURSOR_BUSY;
		}
	else
		{
		fs->cursor_state &= ~FULLSCREEN_CURSOR_BUSY;
		}

	clear_mouse_cursor(fs->window, fs->cursor_state);
}

static gboolean fullscreen_mouse_set_busy_cb(gpointer data)
{
	FullScreenData *fs = data;

	fs->busy_mouse_id = -1;
	fullscreen_mouse_set_busy(fs, TRUE);
	return FALSE;
}

static void fullscreen_mouse_set_busy_idle(FullScreenData *fs)
{
	if (fs->busy_mouse_id == -1)
		{
		fs->busy_mouse_id = g_timeout_add(FULL_SCREEN_BUSY_MOUSE_DELAY,
						  fullscreen_mouse_set_busy_cb, fs);
		}
}

static void fullscreen_image_update_cb(ImageWindow *imd, gpointer data)
{
	FullScreenData *fs = data;

	if (fs->imd->il &&
	    fs->imd->il->pixbuf != image_get_pixbuf(fs->imd))
		{
		fullscreen_mouse_set_busy_idle(fs);
		}
}

static void fullscreen_image_complete_cb(ImageWindow *imd, gint preload, gpointer data)
{
	FullScreenData *fs = data;

	if (!preload) fullscreen_mouse_set_busy(fs, FALSE);
}

#define XSCREENSAVER_BINARY	"xscreensaver-command"
#define XSCREENSAVER_COMMAND	"xscreensaver-command -deactivate >&- 2>&- &"

static void fullscreen_saver_deactivate(void)
{
	static gint checked = FALSE;
	static gint found = FALSE;

	if (!checked)
		{
		checked = TRUE;
		found = file_in_path(XSCREENSAVER_BINARY);
		}

	if (found)
		{
		system (XSCREENSAVER_COMMAND);
		}
}

static gboolean fullscreen_saver_block_cb(gpointer data)
{
	if (fullscreen_disable_saver)
		{
		fullscreen_saver_deactivate();
		}

	return TRUE;
}

static gint fullscreen_delete_cb(GtkWidget *widget, GdkEventAny *event, gpointer data)
{
	FullScreenData *fs = data;

	fullscreen_stop(fs);
	return TRUE;
}

FullScreenData *fullscreen_start(GtkWidget *window, ImageWindow *imd,
				 void (*stop_func)(FullScreenData *, gpointer), gpointer stop_data)
{
	FullScreenData *fs;
	GdkScreen *screen;
	gint same;
	gint x, y;
	gint w, h;
	GdkGeometry geometry;

	if (!window || !imd) return NULL;

	fs = g_new0(FullScreenData, 1);

	fs->hide_mouse_id = -1;
	fs->busy_mouse_id = -1;
	fs->cursor_state = FULLSCREEN_CURSOR_HIDDEN;

	fs->normal_window = window;
	fs->normal_imd = imd;

	fs->stop_func = stop_func;
	fs->stop_data = stop_data;

	if (debug) printf("full screen requests screen %d\n", fullscreen_screen);
	fullscreen_prefs_get_geometry(fullscreen_screen, window, &x, &y, &w, &h,
				      &screen, &same);

	fs->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_window_set_wmclass(GTK_WINDOW(fs->window), "fullscreen", "GQview");

	/* this requests no decorations, if you still have them complain to the window manager author(s) */
	gtk_window_set_decorated(GTK_WINDOW(fs->window), FALSE);

	if (fullscreen_screen < 0)
		{
		/* If we want control of the window size and position this is not what we want.
		 * GQview needs control of which monitor(s) to use for full screen.
		 */
		gtk_window_fullscreen(GTK_WINDOW(fs->window));
		}
	else if (fullscreen_above)
		{
		/* request to be above other windows */
		gtk_window_set_keep_above(GTK_WINDOW(fs->window), TRUE);
		}

	gtk_window_set_resizable(GTK_WINDOW(fs->window), FALSE);

	gtk_window_set_screen(GTK_WINDOW(fs->window), screen);
	gtk_container_set_border_width(GTK_CONTAINER(fs->window), 0);
	g_signal_connect(G_OBJECT(fs->window), "delete_event",
			 G_CALLBACK(fullscreen_delete_cb), fs);

	gtk_window_set_title(GTK_WINDOW(fs->window), _("GQview full screen"));

	geometry.min_width = w;
	geometry.min_height = h;
	geometry.max_width = w;
	geometry.max_height = h;
	geometry.base_width = w;
	geometry.base_height = h;
	geometry.win_gravity = GDK_GRAVITY_STATIC;
	/* By setting USER_POS and USER_SIZE, most window managers will
	 * not request positioning of the full screen window (for example twm).
	 *
	 * In addition, setting gravity to STATIC will result in the
	 * decorations of twm to not effect the requested window position,
	 * the decorations will simply be off screen, except in multi monitor setups :-/
	 */
	gtk_window_set_geometry_hints(GTK_WINDOW(fs->window), fs->window, &geometry,
				      GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE | GDK_HINT_BASE_SIZE |
				      GDK_HINT_WIN_GRAVITY |
				      GDK_HINT_USER_POS);

	gtk_window_set_default_size(GTK_WINDOW(fs->window), w, h);
	gtk_window_move(GTK_WINDOW(fs->window), x, y);

	fs->imd = image_new(FALSE);

	gtk_container_add(GTK_CONTAINER(fs->window), fs->imd->widget);

	/* set background to black */
	if (BLACK_BACKGROUND)
		{
		image_background_set_black(fs->imd, TRUE);
		}

	image_set_delay_flip(fs->imd, fullscreen_clean_flip);
	image_auto_refresh(fs->imd, fs->normal_imd->auto_refresh_interval);

	if (fullscreen_clean_flip)
		{
		image_set_update_func(fs->imd, fullscreen_image_update_cb, fs);
		image_set_complete_func(fs->imd, fullscreen_image_complete_cb, fs);
		}

	gtk_widget_show(fs->imd->widget);

	image_change_from_image(fs->imd, fs->normal_imd);

	gtk_widget_show(fs->window);

	/* for hiding the mouse */
	g_signal_connect(G_OBJECT(fs->imd->pr), "motion_notify_event",
			   G_CALLBACK(fullscreen_mouse_moved), fs);
	clear_mouse_cursor(fs->window, fs->cursor_state);

	/* set timer to block screen saver */
	fs->saver_block_id = g_timeout_add(60 * 1000, fullscreen_saver_block_cb, fs);

	/* hide normal window
	 * FIXME: properly restore this window on show
	 */
#ifdef HIDE_WINDOW_IN_FULLSCREEN
	gtk_widget_hide(fs->normal_window);
#endif
	image_change_path(fs->normal_imd, NULL, image_zoom_get(fs->normal_imd));

	return fs;
}

void fullscreen_stop(FullScreenData *fs)
{
	if (!fs) return;

	g_source_remove(fs->saver_block_id);

	fullscreen_hide_mouse_disable(fs);
	fullscreen_busy_mouse_disable(fs);