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-rw-r--r--utils/gdm-screenshot.c296
1 files changed, 296 insertions, 0 deletions
diff --git a/utils/gdm-screenshot.c b/utils/gdm-screenshot.c
new file mode 100644
index 0000000..5d20929
--- /dev/null
+++ b/utils/gdm-screenshot.c
@@ -0,0 +1,296 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2008 William Jon McCann <jmccann@redhat.com>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <locale.h>
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+#include <canberra-gtk.h>
+
+#include <X11/Xatom.h>
+#include <gdk/gdkx.h>
+
+#define SELECTION_NAME "_GDM_SCREENSHOT"
+static GtkWidget *selection_window;
+
+static gboolean debug_in;
+
+/* Keep all config options for compatibility even if they are noops */
+GOptionEntry options [] = {
+ { "debug", 'd', 0, G_OPTION_ARG_NONE, &debug_in, N_("Debugging output"), NULL },
+ { NULL }
+};
+
+/* To make sure there is only one screenshot taken at a time,
+ * (Imagine key repeat for the print screen key) we hold a selection
+ * until we are done taking the screenshot
+ */
+/* * Copyright (C) 2001-2006 Jonathan Blandford <jrb@alum.mit.edu> */
+static gboolean
+screenshot_grab_lock (void)
+{
+ Atom selection_atom;
+ GdkCursor *cursor;
+ gboolean result = FALSE;
+
+ selection_atom = gdk_x11_get_xatom_by_name (SELECTION_NAME);
+ XGrabServer (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()));
+ if (XGetSelectionOwner (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()), selection_atom) != None) {
+ goto out;
+ }
+
+ selection_window = gtk_invisible_new ();
+ gtk_widget_show (selection_window);
+
+ if (!gtk_selection_owner_set (selection_window,
+ gdk_atom_intern (SELECTION_NAME, FALSE),
+ GDK_CURRENT_TIME)) {
+ gtk_widget_destroy (selection_window);
+ selection_window = NULL;
+ goto out;
+ }
+
+ cursor = gdk_cursor_new_for_display (gdk_display_get_default (), GDK_WATCH);
+ gdk_pointer_grab (gtk_widget_get_window (selection_window), FALSE, 0, NULL,
+ cursor, GDK_CURRENT_TIME);
+ g_object_unref (cursor);
+
+ result = TRUE;
+
+ out:
+ XUngrabServer (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()));
+ gdk_flush ();
+
+ return result;
+}
+
+/* * Copyright (C) 2001-2006 Jonathan Blandford <jrb@alum.mit.edu> */
+static void
+screenshot_release_lock (void)
+{
+ if (selection_window != NULL) {
+ gtk_widget_destroy (selection_window);
+ selection_window = NULL;
+ }
+ gdk_flush ();
+}
+
+/* * Copyright (C) 2001-2006 Jonathan Blandford <jrb@alum.mit.edu> */
+static GdkPixbuf *
+screenshot_get_pixbuf (Window w)
+{
+ GdkWindow *window;
+ GdkWindow *root;
+ GdkPixbuf *screenshot;
+ int x_real_orig;
+ int y_real_orig;
+ int x_orig;
+ int y_orig;
+ int real_width;
+ int real_height;
+ int width;
+ int height;
+
+ window = gdk_x11_window_foreign_new_for_display (gdk_display_get_default (), w);
+ if (window == NULL) {
+ return NULL;
+ }
+
+ root = gdk_x11_window_foreign_new_for_display (gdk_display_get_default (), GDK_ROOT_WINDOW ());
+ gdk_window_get_geometry (window, NULL, NULL, &real_width, &real_height);
+ gdk_window_get_origin (window, &x_real_orig, &y_real_orig);
+
+ x_orig = x_real_orig;
+ y_orig = y_real_orig;
+ width = real_width;
+ height = real_height;
+
+ if (x_orig < 0) {
+ width = width + x_orig;
+ x_orig = 0;
+ }
+ if (y_orig < 0) {
+ height = height + y_orig;
+ y_orig = 0;
+ }
+
+ if (x_orig + width > gdk_screen_width ()) {
+ width = gdk_screen_width () - x_orig;
+ }
+ if (y_orig + height > gdk_screen_height ()) {
+ height = gdk_screen_height () - y_orig;
+ }
+
+ screenshot = gdk_pixbuf_get_from_window (root,
+ x_orig,
+ y_orig,
+ width,
+ height);
+
+ return screenshot;
+}
+
+static char *
+screenshot_save (GdkPixbuf *pixbuf)
+{
+ char *filename;
+ gboolean res;
+ GError *error;
+
+ filename = g_build_filename (GDM_SCREENSHOT_DIR,
+ "GDM-Screenshot.png",
+ NULL);
+
+ error = NULL;
+ res = gdk_pixbuf_save (pixbuf,
+ filename,
+ "png",
+ &error,
+ "tEXt::CREATOR", "gdm-screenshot",
+ NULL);
+ if (! res) {
+ g_warning ("Unable to save screenshot: %s", error->message);
+ g_error_free (error);
+ g_free (filename);
+ filename = NULL;
+ }
+
+ return filename;
+}
+
+static void
+sound_effect_finished (ca_context *c,
+ uint32_t id,
+ int error_code,
+ void *userdata)
+{
+}
+
+static void
+play_sound_effect (Window xid)
+{
+ ca_context *c;
+ ca_proplist *p;
+ int res;
+
+ c = ca_gtk_context_get ();
+
+ p = NULL;
+ res = ca_proplist_create (&p);
+ if (res < 0) {
+ goto done;
+ }
+
+ res = ca_proplist_sets (p, CA_PROP_EVENT_ID, "screen-capture");
+ if (res < 0) {
+ goto done;
+ }
+
+ res = ca_proplist_sets (p, CA_PROP_EVENT_DESCRIPTION, _("Screenshot taken"));
+ if (res < 0) {
+ goto done;
+ }
+
+ res = ca_proplist_setf (p,
+ CA_PROP_WINDOW_X11_XID,
+ "%lu",
+ (unsigned long) xid);
+ if (res < 0) {
+ goto done;
+ }
+
+ ca_context_play_full (c, 0, p, sound_effect_finished, NULL);
+
+ done:
+ if (p != NULL) {
+ ca_proplist_destroy (p);
+ }
+
+}
+
+static void
+prepare_screenshot (void)
+{
+ Window win;
+ GdkPixbuf *screenshot;
+ char *filename;
+
+ if (!screenshot_grab_lock ()) {
+ exit (EXIT_SUCCESS);
+ }
+
+ win = GDK_ROOT_WINDOW ();
+
+ screenshot = screenshot_get_pixbuf (win);
+
+ screenshot_release_lock ();
+
+ if (screenshot == NULL) {
+ /* FIXME: dialog? */
+ exit (EXIT_FAILURE);
+ }
+
+ play_sound_effect (win);
+
+ filename = screenshot_save (screenshot);
+ if (filename != NULL) {
+ g_print ("Wrote %s\n", filename);
+ /* FIXME: show a dialog or something */
+ g_free (filename);
+ }
+}
+
+int
+main (int argc, char *argv[])
+{
+ GOptionContext *ctx;
+ gboolean res;
+ GError *error;
+
+ bindtextdomain (GETTEXT_PACKAGE, GNOMELOCALEDIR);
+ bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+ textdomain (GETTEXT_PACKAGE);
+ setlocale (LC_ALL, "");
+
+ /* Option parsing */
+ ctx = g_option_context_new (N_("Take a picture of the screen"));
+ g_option_context_set_translation_domain (ctx, GETTEXT_PACKAGE);
+ g_option_context_add_main_entries (ctx, options, NULL);
+ g_option_context_add_group (ctx, gtk_get_option_group (TRUE));
+ error = NULL;
+ res = g_option_context_parse (ctx, &argc, &argv, &error);
+ g_option_context_free (ctx);
+
+ if (! res) {
+ g_warning ("%s", error->message);
+ g_error_free (error);
+ exit (EXIT_FAILURE);
+ }
+
+ prepare_screenshot ();
+
+ return 1;
+}
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