gnome-control-center/panels/background/cc-background-panel.c

725 lines
21 KiB
C

/*
* Copyright (C) 2010 Intel, Inc
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Author: Thomas Wood <thomas.wood@intel.com>
*
*/
#include <config.h>
#include <string.h>
#include <glib.h>
#include <glib/gi18n-lib.h>
#include <glib/gstdio.h>
#include <gdesktop-enums.h>
#include "cc-background-panel.h"
#include "cc-background-item.h"
#include "cc-background-xml.h"
#include "cc-background-chooser-dialog.h"
#include "bg-pictures-source.h"
#define WP_PATH_ID "org.gnome.desktop.background"
#define WP_URI_KEY "picture-uri"
#define WP_OPTIONS_KEY "picture-options"
#define WP_SHADING_KEY "color-shading-type"
#define WP_PCOLOR_KEY "primary-color"
#define WP_SCOLOR_KEY "secondary-color"
CC_PANEL_REGISTER (CcBackgroundPanel, cc_background_panel)
#define BACKGROUND_PANEL_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE ((o), CC_TYPE_BACKGROUND_PANEL, CcBackgroundPanelPrivate))
struct _CcBackgroundPanelPrivate
{
GtkBuilder *builder;
GDBusConnection *connection;
GSettings *settings;
GnomeDesktopThumbnailFactory *thumb_factory;
CcBackgroundItem *current_background;
GCancellable *copy_cancellable;
GtkWidget *spinner;
GdkPixbuf *display_screenshot;
char *screenshot_path;
};
#define WID(y) (GtkWidget *) gtk_builder_get_object (priv->builder, y)
static const char *
cc_background_panel_get_help_uri (CcPanel *panel)
{
return "help:gnome-help/look-background";
}
static void
cc_background_panel_dispose (GObject *object)
{
CcBackgroundPanelPrivate *priv = CC_BACKGROUND_PANEL (object)->priv;
g_clear_object (&priv->builder);
/* destroying the builder object will also destroy the spinner */
priv->spinner = NULL;
g_clear_object (&priv->settings);
if (priv->copy_cancellable)
{
/* cancel any copy operation */
g_cancellable_cancel (priv->copy_cancellable);
g_object_unref (priv->copy_cancellable);
priv->copy_cancellable = NULL;
}
g_clear_object (&priv->thumb_factory);
g_clear_object (&priv->display_screenshot);
g_free (priv->screenshot_path);
priv->screenshot_path = NULL;
g_clear_object (&priv->connection);
G_OBJECT_CLASS (cc_background_panel_parent_class)->dispose (object);
}
static void
cc_background_panel_finalize (GObject *object)
{
CcBackgroundPanelPrivate *priv = CC_BACKGROUND_PANEL (object)->priv;
g_clear_object (&priv->current_background);
G_OBJECT_CLASS (cc_background_panel_parent_class)->finalize (object);
}
static void
cc_background_panel_class_init (CcBackgroundPanelClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
CcPanelClass *panel_class = CC_PANEL_CLASS (klass);
g_type_class_add_private (klass, sizeof (CcBackgroundPanelPrivate));
panel_class->get_help_uri = cc_background_panel_get_help_uri;
object_class->dispose = cc_background_panel_dispose;
object_class->finalize = cc_background_panel_finalize;
}
static void
update_preview (CcBackgroundPanelPrivate *priv,
CcBackgroundItem *item)
{
gboolean changes_with_time;
if (item && priv->current_background)
{
g_object_unref (priv->current_background);
priv->current_background = cc_background_item_copy (item);
cc_background_item_load (priv->current_background, NULL);
}
changes_with_time = FALSE;
if (priv->current_background)
{
changes_with_time = cc_background_item_changes_with_time (priv->current_background);
}
gtk_widget_set_visible (WID ("slide_image"), changes_with_time);
gtk_widget_set_visible (WID ("slide-label"), changes_with_time);
gtk_widget_queue_draw (WID ("background-desktop-drawingarea"));
}
static char *
get_save_path (void)
{
return g_build_filename (g_get_user_config_dir (),
"gnome-control-center",
"backgrounds",
"last-edited.xml",
NULL);
}
static void
update_display_preview (CcBackgroundPanel *panel)
{
CcBackgroundPanelPrivate *priv = panel->priv;
GtkWidget *widget;
GtkAllocation allocation;
const gint preview_width = 416;
const gint preview_height = 248;
GdkPixbuf *pixbuf;
GIcon *icon;
cairo_t *cr;
widget = WID ("background-desktop-drawingarea");
gtk_widget_get_allocation (widget, &allocation);
if (!priv->current_background)
return;
icon = cc_background_item_get_frame_thumbnail (priv->current_background,
priv->thumb_factory,
preview_width,
preview_height,
-2, TRUE);
pixbuf = GDK_PIXBUF (icon);
cr = gdk_cairo_create (gtk_widget_get_window (widget));
gdk_cairo_set_source_pixbuf (cr,
pixbuf,
0, 0);
cairo_paint (cr);
g_object_unref (pixbuf);
pixbuf = NULL;
if (panel->priv->display_screenshot != NULL)
pixbuf = gdk_pixbuf_scale_simple (panel->priv->display_screenshot,
preview_width,
preview_height,
GDK_INTERP_BILINEAR);
if (pixbuf)
{
gdk_cairo_set_source_pixbuf (cr,
pixbuf,
0, 0);
cairo_paint (cr);
}
cairo_destroy (cr);
}
static void
on_screenshot_finished (GObject *source,
GAsyncResult *res,
gpointer user_data)
{
CcBackgroundPanel *panel = user_data;
CcBackgroundPanelPrivate *priv = panel->priv;
GError *error;
GdkRectangle rect;
GtkWidget *widget;
GdkPixbuf *pixbuf;
cairo_surface_t *surface;
cairo_t *cr;
int width;
int height;
int primary;
error = NULL;
g_dbus_connection_call_finish (panel->priv->connection,
res,
&error);
if (error != NULL) {
g_debug ("Unable to get screenshot: %s",
error->message);
g_error_free (error);
/* fallback? */
goto out;
}
pixbuf = gdk_pixbuf_new_from_file (panel->priv->screenshot_path, &error);
if (error != NULL)
{
g_debug ("Unable to use GNOME Shell's builtin screenshot interface: %s",
error->message);
g_error_free (error);
goto out;
}
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
width, height);
cr = cairo_create (surface);
gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
cairo_paint (cr);
g_object_unref (pixbuf);
/* clear the workarea */
widget = WID ("background-desktop-drawingarea");
primary = gdk_screen_get_primary_monitor (gtk_widget_get_screen (widget));
gdk_screen_get_monitor_workarea (gtk_widget_get_screen (widget), primary, &rect);
cairo_save (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_rectangle (cr, rect.x, rect.y, rect.width, rect.height);
cairo_fill (cr);
cairo_restore (cr);
g_clear_object (&panel->priv->display_screenshot);
panel->priv->display_screenshot = gdk_pixbuf_get_from_surface (surface,
0, 0,
width,
height);
/* remove the temporary file created by the shell */
g_unlink (panel->priv->screenshot_path);
g_free (priv->screenshot_path);
priv->screenshot_path = NULL;
cairo_destroy (cr);
cairo_surface_destroy (surface);
out:
update_display_preview (panel);
}
static void
get_screenshot_async (CcBackgroundPanel *panel,
GdkRectangle *rectangle)
{
gchar *path, *tmpname;
const gchar *method_name;
GVariant *method_params;
path = g_build_filename (g_get_user_cache_dir (), "gnome-control-center", NULL);
g_mkdir_with_parents (path, 0700);
tmpname = g_strdup_printf ("scr-%d.png", g_random_int ());
g_free (panel->priv->screenshot_path);
panel->priv->screenshot_path = g_build_filename (path, tmpname, NULL);
g_free (path);
g_free (tmpname);
method_name = "ScreenshotArea";
method_params = g_variant_new ("(iiiibs)",
rectangle->x, rectangle->y,
rectangle->width, rectangle->height,
FALSE, /* flash */
panel->priv->screenshot_path);
g_dbus_connection_call (panel->priv->connection,
"org.gnome.Shell",
"/org/gnome/Shell",
"org.gnome.Shell",
method_name,
method_params,
NULL,
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL,
on_screenshot_finished,
panel);
}
static gboolean
on_preview_draw (GtkWidget *widget,
cairo_t *cr,
CcBackgroundPanel *panel)
{
/* we have another shot in flight or an existing cache */
if (panel->priv->display_screenshot == NULL
&& panel->priv->screenshot_path == NULL)
{
GdkRectangle rect;
int primary;
primary = gdk_screen_get_primary_monitor (gtk_widget_get_screen (widget));
gdk_screen_get_monitor_geometry (gtk_widget_get_screen (widget), primary, &rect);
get_screenshot_async (panel, &rect);
}
else
update_display_preview (panel);
return TRUE;
}
static void
reload_current_bg (CcBackgroundPanel *self)
{
CcBackgroundPanelPrivate *priv;
CcBackgroundItem *saved, *configured;
gchar *uri, *pcolor, *scolor;
priv = self->priv;
/* Load the saved configuration */
uri = get_save_path ();
saved = cc_background_xml_get_item (uri);
g_free (uri);
/* initalise the current background information from settings */
uri = g_settings_get_string (priv->settings, WP_URI_KEY);
if (uri && *uri == '\0')
{
g_free (uri);
uri = NULL;
}
else
{
GFile *file;
file = g_file_new_for_commandline_arg (uri);
g_object_unref (file);
}
configured = cc_background_item_new (uri);
g_free (uri);
pcolor = g_settings_get_string (priv->settings, WP_PCOLOR_KEY);
scolor = g_settings_get_string (priv->settings, WP_SCOLOR_KEY);
g_object_set (G_OBJECT (configured),
"name", _("Current background"),
"placement", g_settings_get_enum (priv->settings, WP_OPTIONS_KEY),
"shading", g_settings_get_enum (priv->settings, WP_SHADING_KEY),
"primary-color", pcolor,
"secondary-color", scolor,
NULL);
g_free (pcolor);
g_free (scolor);
if (saved != NULL && cc_background_item_compare (saved, configured))
{
CcBackgroundItemFlags flags;
flags = cc_background_item_get_flags (saved);
/* Special case for colours */
if (cc_background_item_get_placement (saved) == G_DESKTOP_BACKGROUND_STYLE_NONE)
flags &=~ (CC_BACKGROUND_ITEM_HAS_PCOLOR | CC_BACKGROUND_ITEM_HAS_SCOLOR);
g_object_set (G_OBJECT (configured),
"name", cc_background_item_get_name (saved),
"flags", flags,
"source-url", cc_background_item_get_source_url (saved),
"source-xml", cc_background_item_get_source_xml (saved),
NULL);
}
if (saved != NULL)
g_object_unref (saved);
g_clear_object (&priv->current_background);
priv->current_background = configured;
cc_background_item_load (priv->current_background, NULL);
}
static gboolean
create_save_dir (void)
{
char *path;
path = g_build_filename (g_get_user_config_dir (),
"gnome-control-center",
"backgrounds",
NULL);
if (g_mkdir_with_parents (path, 0755) < 0)
{
g_warning ("Failed to create directory '%s'", path);
g_free (path);
return FALSE;
}
g_free (path);
return TRUE;
}
static void
copy_finished_cb (GObject *source_object,
GAsyncResult *result,
gpointer pointer)
{
GError *err = NULL;
CcBackgroundPanel *panel = (CcBackgroundPanel *) pointer;
CcBackgroundPanelPrivate *priv = panel->priv;
CcBackgroundItem *item;
if (!g_file_copy_finish (G_FILE (source_object), result, &err))
{
if (err->code != G_IO_ERROR_CANCELLED)
g_warning ("Failed to copy image to cache location: %s", err->message);
g_error_free (err);
}
item = g_object_get_data (source_object, "item");
g_settings_apply (priv->settings);
/* the panel may have been destroyed before the callback is run, so be sure
* to check the widgets are not NULL */
if (priv->spinner)
{
gtk_widget_destroy (GTK_WIDGET (priv->spinner));
priv->spinner = NULL;
}
if (priv->current_background)
cc_background_item_load (priv->current_background, NULL);
if (priv->builder)
{
char *filename;
update_preview (priv, item);
/* Save the source XML if there is one */
filename = get_save_path ();
if (create_save_dir ())
cc_background_xml_save (priv->current_background, filename);
}
/* remove the reference taken when the copy was set up */
g_object_unref (panel);
}
static void
set_background (CcBackgroundPanel *panel,
CcBackgroundItem *item)
{
CcBackgroundPanelPrivate *priv = panel->priv;
GDesktopBackgroundStyle style;
gboolean save_settings = TRUE;
const char *uri;
CcBackgroundItemFlags flags;
char *filename;
if (item == NULL)
return;
uri = cc_background_item_get_uri (item);
flags = cc_background_item_get_flags (item);
if ((flags & CC_BACKGROUND_ITEM_HAS_URI) && uri == NULL)
{
g_settings_set_enum (priv->settings, WP_OPTIONS_KEY, G_DESKTOP_BACKGROUND_STYLE_NONE);
g_settings_set_string (priv->settings, WP_URI_KEY, "");
}
else if (cc_background_item_get_source_url (item) != NULL &&
cc_background_item_get_needs_download (item))
{
GFile *source, *dest;
char *cache_path, *basename, *dest_path, *display_name, *dest_uri;
GdkPixbuf *pixbuf;
cache_path = bg_pictures_source_get_cache_path ();
if (g_mkdir_with_parents (cache_path, 0755) < 0)
{
g_warning ("Failed to create directory '%s'", cache_path);
g_free (cache_path);
return;
}
g_free (cache_path);
dest_path = bg_pictures_source_get_unique_path (cc_background_item_get_source_url (item));
dest = g_file_new_for_path (dest_path);
g_free (dest_path);
source = g_file_new_for_uri (cc_background_item_get_source_url (item));
basename = g_file_get_basename (source);
display_name = g_filename_display_name (basename);
dest_path = g_file_get_path (dest);
g_free (basename);
/* create a blank image to use until the source image is ready */
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
gdk_pixbuf_fill (pixbuf, 0x00000000);
gdk_pixbuf_save (pixbuf, dest_path, "png", NULL, NULL);
g_object_unref (pixbuf);
g_free (dest_path);
if (priv->copy_cancellable)
{
g_cancellable_cancel (priv->copy_cancellable);
g_cancellable_reset (priv->copy_cancellable);
}
if (priv->spinner)
{
gtk_widget_destroy (GTK_WIDGET (priv->spinner));
priv->spinner = NULL;
}
/* create a spinner while the file downloads */
priv->spinner = gtk_spinner_new ();
gtk_spinner_start (GTK_SPINNER (priv->spinner));
gtk_box_pack_start (GTK_BOX (WID ("bottom-hbox")), priv->spinner, FALSE,
FALSE, 6);
gtk_widget_show (priv->spinner);
/* reference the panel in case it is removed before the copy is
* finished */
g_object_ref (panel);
g_object_set_data_full (G_OBJECT (source), "item", g_object_ref (item), g_object_unref);
g_file_copy_async (source, dest, G_FILE_COPY_OVERWRITE,
G_PRIORITY_DEFAULT, priv->copy_cancellable,
NULL, NULL,
copy_finished_cb, panel);
g_object_unref (source);
dest_uri = g_file_get_uri (dest);
g_object_unref (dest);
g_settings_set_string (priv->settings, WP_URI_KEY, dest_uri);
g_object_set (G_OBJECT (item),
"uri", dest_uri,
"needs-download", FALSE,
"name", display_name,
NULL);
g_free (display_name);
g_free (dest_uri);
/* delay the updated drawing of the preview until the copy finishes */
save_settings = FALSE;
}
else
{
g_settings_set_string (priv->settings, WP_URI_KEY, uri);
}
/* Also set the placement if we have a URI and the previous value was none */
if (flags & CC_BACKGROUND_ITEM_HAS_PLACEMENT)
{
g_settings_set_enum (priv->settings, WP_OPTIONS_KEY, cc_background_item_get_placement (item));
}
else if (uri != NULL)
{
style = g_settings_get_enum (priv->settings, WP_OPTIONS_KEY);
if (style == G_DESKTOP_BACKGROUND_STYLE_NONE)
g_settings_set_enum (priv->settings, WP_OPTIONS_KEY, cc_background_item_get_placement (item));
}
if (flags & CC_BACKGROUND_ITEM_HAS_SHADING)
g_settings_set_enum (priv->settings, WP_SHADING_KEY, cc_background_item_get_shading (item));
g_settings_set_string (priv->settings, WP_PCOLOR_KEY, cc_background_item_get_pcolor (item));
g_settings_set_string (priv->settings, WP_SCOLOR_KEY, cc_background_item_get_scolor (item));
/* update the preview information */
if (save_settings != FALSE)
{
/* Apply all changes */
g_settings_apply (priv->settings);
/* Save the source XML if there is one */
filename = get_save_path ();
if (create_save_dir ())
cc_background_xml_save (priv->current_background, filename);
}
}
static void
on_chooser_dialog_response (GtkDialog *dialog,
int response_id,
CcBackgroundPanel *self)
{
if (response_id == GTK_RESPONSE_OK)
{
CcBackgroundItem *item;
item = cc_background_chooser_dialog_get_item (CC_BACKGROUND_CHOOSER_DIALOG (dialog));
if (item != NULL)
{
set_background (self, item);
g_object_unref (item);
}
}
gtk_widget_destroy (GTK_WIDGET (dialog));
}
static void
on_background_button_clicked (GtkButton *button,
CcBackgroundPanel *self)
{
CcBackgroundPanelPrivate *priv = self->priv;
GtkWidget *dialog;
dialog = cc_background_chooser_dialog_new ();
gtk_window_set_transient_for (GTK_WINDOW (dialog),
GTK_WINDOW (gtk_widget_get_toplevel (WID ("background-panel"))));
gtk_widget_show (dialog);
g_signal_connect (dialog, "response", G_CALLBACK (on_chooser_dialog_response), self);
}
static void
on_settings_changed (GSettings *settings,
gchar *key,
CcBackgroundPanel *self)
{
reload_current_bg (self);
update_preview (self->priv, NULL);
}
static void
cc_background_panel_init (CcBackgroundPanel *self)
{
CcBackgroundPanelPrivate *priv;
gchar *objects[] = {"background-panel", NULL };
GError *err = NULL;
GtkWidget *widget;
priv = self->priv = BACKGROUND_PANEL_PRIVATE (self);
priv->builder = gtk_builder_new ();
priv->connection = g_application_get_dbus_connection (g_application_get_default ());
gtk_builder_add_objects_from_file (priv->builder,
UIDIR"/background.ui",
objects, &err);
if (err)
{
g_warning ("Could not load ui: %s", err->message);
g_error_free (err);
return;
}
priv->settings = g_settings_new (WP_PATH_ID);
g_settings_delay (priv->settings);
/* add the top level widget */
widget = WID ("background-panel");
gtk_container_add (GTK_CONTAINER (self), widget);
gtk_widget_show_all (GTK_WIDGET (self));
/* setup preview area */
widget = WID ("background-desktop-drawingarea");
g_signal_connect (widget, "draw", G_CALLBACK (on_preview_draw),
self);
priv->copy_cancellable = g_cancellable_new ();
priv->thumb_factory = gnome_desktop_thumbnail_factory_new (GNOME_DESKTOP_THUMBNAIL_SIZE_LARGE);
reload_current_bg (self);
update_preview (priv, NULL);
g_signal_connect (priv->settings, "changed", G_CALLBACK (on_settings_changed), self);
widget = WID ("background-set-button");
g_signal_connect (widget, "clicked", G_CALLBACK (on_background_button_clicked), self);
}
void
cc_background_panel_register (GIOModule *module)
{
cc_background_panel_register_type (G_TYPE_MODULE (module));
g_io_extension_point_implement (CC_SHELL_PANEL_EXTENSION_POINT,
CC_TYPE_BACKGROUND_PANEL,
"background", 0);
}