[epiphany] Implement EphyEmbedPersist using WebKitDownload

[Diego Escalante Urrelo <diegoe src gnome org>]

commit be7e6f151fa288bbbdf02a72ea4e791eb38ef85f
Author: Diego Escalante Urrelo <descalante igalia com>
Date:   Fri Jan 15 11:23:36 2010 -0500

    Implement EphyEmbedPersist using WebKitDownload
    
    EphyEmbedPersist is the object in charge of most context menu options. It
    handles "Save target as", "Open Image", "Save image as", among other actions.
    This reimplements it using WebKitDownload.
    
    Bug #600987

 embed/ephy-embed-persist.c |  192 +++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 188 insertions(+), 4 deletions(-)
---
diff --git a/embed/ephy-embed-persist.c b/embed/ephy-embed-persist.c
index 2c82c03..f413af5 100644
--- a/embed/ephy-embed-persist.c
+++ b/embed/ephy-embed-persist.c
@@ -2,6 +2,7 @@
 /*
  *  Copyright © 2000-2003 Marco Pesenti Gritti
  *  Copyright © 2003 Christian Persch
+ *  Copyright © 2010 Igalia S.L.
  *
  *  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
@@ -22,10 +23,14 @@
 #include "config.h"
 
 #include "ephy-embed-persist.h"
+#include "ephy-embed-shell.h"
 #include "ephy-embed-type-builtins.h"
+#include "ephy-file-chooser.h"
+#include "ephy-file-helpers.h"
 #include "ephy-debug.h"
 
 #include <gtk/gtk.h>
+#include <glib/gi18n.h>
 
 enum
 {
@@ -55,6 +60,7 @@ struct _EphyEmbedPersistPrivate
 	EphyEmbedPersistFlags flags;
 	GtkWindow *fc_parent;
 	guint32 user_time;
+	WebKitDownload *download;
 };
 
 static void	ephy_embed_persist_class_init	(EphyEmbedPersistClass *klass);
@@ -123,8 +129,8 @@ ephy_embed_persist_set_fc_title (EphyEmbedPersist *persist,
  * @value: the #EphyWindow which should be the filechooser's parent
  *
  * Sets the #EphyWindow which should be @persist's filechooser's parent. The
- * filechooser will only be displayed if %EPHY_EMBED_PERSIST_ASK_DESTINATION has been
- * set with ephy_embed_persist_set_flags().
+ * filechooser will only be displayed if %EPHY_EMBED_PERSIST_ASK_DESTINATION
+ * has been set with ephy_embed_persist_set_flags().
  **/
 void
 ephy_embed_persist_set_fc_parent (EphyEmbedPersist *persist,
@@ -134,6 +140,7 @@ ephy_embed_persist_set_fc_parent (EphyEmbedPersist *persist,
 	GtkWindow **wptr;
 
 	g_return_if_fail (EPHY_IS_EMBED_PERSIST (persist));
+	g_return_if_fail (gtk_widget_is_toplevel (GTK_WIDGET (value)));
 
 	priv = persist->priv;
 
@@ -476,6 +483,23 @@ ephy_embed_persist_init (EphyEmbedPersist *persist)
 }
 
 static void
+ephy_embed_persist_dispose (GObject *object)
+{
+	EphyEmbedPersist *persist = EPHY_EMBED_PERSIST (object);
+	EphyEmbedPersistPrivate *priv = persist->priv;
+
+	if (priv->download)
+	{
+		g_object_unref (priv->download);
+		priv->download = NULL;
+	}
+
+	LOG ("EphyEmbedPersist disposed %p", object);
+
+	G_OBJECT_CLASS (ephy_embed_persist_parent_class)->dispose (object);
+}
+
+static void
 ephy_embed_persist_finalize (GObject *object)
 {
 	EphyEmbedPersist *persist = EPHY_EMBED_PERSIST (object);
@@ -505,6 +529,7 @@ ephy_embed_persist_class_init (EphyEmbedPersistClass *klass)
 	GObjectClass *object_class = G_OBJECT_CLASS (klass);
 
 	object_class->finalize = ephy_embed_persist_finalize;
+	object_class->dispose = ephy_embed_persist_dispose;
 	object_class->set_property = ephy_embed_persist_set_property;
 	object_class->get_property = ephy_embed_persist_get_property;
 
@@ -629,7 +654,74 @@ ephy_embed_persist_class_init (EphyEmbedPersistClass *klass)
 void
 ephy_embed_persist_cancel (EphyEmbedPersist *persist)
 {
-	g_object_unref (persist);
+	g_return_if_fail (EPHY_IS_EMBED_PERSIST (persist));
+
+	/* webkit_download_cancel() triggers download_status_changed_cb() with
+	 * status = WEBKIT_DOWNLOAD_STATUS_CANCELLED so we don't need to emit
+	 * the signal.
+	 */
+	if (persist->priv->download)
+	{
+		webkit_download_cancel (persist->priv->download);
+	}
+	else
+	{
+		g_object_unref (persist);
+	}
+}
+
+static void
+response_cb (GtkDialog *dialog,
+	     int response_id,
+	     EphyEmbedPersist *persist)
+{
+	WebKitDownload *download;
+
+	download = persist->priv->download;
+
+	if (response_id == GTK_RESPONSE_ACCEPT)
+	{
+		char *uri;
+
+		uri = gtk_file_chooser_get_uri (GTK_FILE_CHOOSER(dialog));
+
+		webkit_download_set_destination_uri (download, uri);
+		webkit_download_start (download);
+
+		g_free (uri);
+	}
+	else
+	{
+		g_object_unref (persist);
+	}
+
+	gtk_widget_destroy (GTK_WIDGET (dialog));
+}
+
+static void
+download_status_changed_cb (GObject *object,
+                            GParamSpec *pspec,
+                            EphyEmbedPersist *persist)
+{
+	EphyEmbedPersistPrivate *priv;
+	WebKitDownload *download;
+	WebKitDownloadStatus status;
+
+	priv = persist->priv;
+	download = WEBKIT_DOWNLOAD (object);
+	status = webkit_download_get_status (download);
+
+	if (status == WEBKIT_DOWNLOAD_STATUS_FINISHED)
+	{
+		g_signal_emit_by_name (persist, "completed");
+		g_object_unref (persist);
+	}
+	else if (status == WEBKIT_DOWNLOAD_STATUS_CANCELLED ||
+		 status == WEBKIT_DOWNLOAD_STATUS_ERROR)
+	{
+		g_signal_emit_by_name (persist, "cancelled");
+		g_object_unref (persist);
+	}
 }
 
 /**
@@ -639,7 +731,10 @@ ephy_embed_persist_cancel (EphyEmbedPersist *persist)
  * Begins saving the file specified in @persist.
  *
  * If @persist's #EphyEmbedPersistFlags include %EPHY_EMBED_PERSIST_ASK_DESTINATION, a
- * filechooser dialog will be shown first.
+ * filechooser dialog will be shown first. If this flag is not set and no
+ * destination has been set, the target will be saved to the default download
+ * directory using the suggested name, if no suggested name can be get the
+ * download will fail.
  *
  * The file will continue to download in the background until either the
  * ::completed or the ::cancelled signals are emitted by @persist.
@@ -649,8 +744,96 @@ ephy_embed_persist_cancel (EphyEmbedPersist *persist)
 gboolean
 ephy_embed_persist_save (EphyEmbedPersist *persist)
 {
+	EphyEmbedPersistPrivate *priv;
+	WebKitNetworkRequest *request;
+
+	g_return_val_if_fail (EPHY_IS_EMBED_PERSIST (persist), FALSE);
+
+	priv = persist->priv;
+	g_return_val_if_fail (priv->source != NULL, FALSE);
+
+	/* Balanced when priv->download is not needed anymore: here, in
+	 * ephy_embed_persist_cancel() and in download_status_changed_cb().
+	 */
 	g_object_ref (persist);
 
+	request = webkit_network_request_new (priv->source);
+	priv->download = webkit_download_new (request);
+	g_object_unref (request);
+
+	g_signal_connect (priv->download, "notify::status",
+			  G_CALLBACK (download_status_changed_cb),
+			  persist);
+
+	if (priv->flags & EPHY_EMBED_PERSIST_ASK_DESTINATION)
+	{
+		EphyFileChooser *dialog;
+		GtkWidget *window;
+		const char *suggested_filename;
+
+		suggested_filename = webkit_download_get_suggested_filename (priv->download);
+		window = GTK_WIDGET (priv->fc_parent);
+
+		dialog = ephy_file_chooser_new (priv->fc_title ?
+						  priv->fc_title : _("Save"),
+						window,
+						GTK_FILE_CHOOSER_ACTION_SAVE,
+						priv->persist_key,
+						EPHY_FILE_FILTER_ALL_SUPPORTED);
+
+		gtk_file_chooser_set_do_overwrite_confirmation
+				(GTK_FILE_CHOOSER (dialog), TRUE);
+		gtk_file_chooser_set_current_name
+				(GTK_FILE_CHOOSER (dialog), suggested_filename);
+
+		g_signal_connect (dialog, "response",
+				  G_CALLBACK (response_cb), persist);
+
+		gtk_widget_show (GTK_WIDGET (dialog));
+
+		return TRUE;
+	}
+	else
+	{
+		char *dest_uri;
+
+		if (priv->dest)
+		{
+			dest_uri = g_filename_to_uri (priv->dest, NULL, NULL);
+		}
+		else
+		{
+			const char *suggested_filename = NULL;
+			char *downloads_dir;
+			char *dest_filename;
+
+			suggested_filename = webkit_download_get_suggested_filename (priv->download);
+
+			if (suggested_filename == NULL)
+			{
+				g_object_unref (persist);
+				return FALSE;
+			}
+
+			downloads_dir = ephy_file_get_downloads_dir ();
+			dest_filename = g_build_filename (downloads_dir,
+							  suggested_filename,
+							  NULL);
+			g_free (downloads_dir);
+
+			priv->dest = dest_filename;
+			dest_uri = g_filename_to_uri (dest_filename, NULL, NULL);
+		}
+
+		webkit_download_set_destination_uri (priv->download, dest_uri);
+		webkit_download_start (priv->download);
+
+		g_free (dest_uri);
+
+		return TRUE;
+	}
+
+	g_object_unref (persist);
 	return FALSE;
 }
 
@@ -675,5 +858,6 @@ ephy_embed_persist_save (EphyEmbedPersist *persist)
 char *
 ephy_embed_persist_to_string (EphyEmbedPersist *persist)
 {
+	g_return_val_if_fail (EPHY_IS_EMBED_PERSIST (persist), NULL);
 	return NULL;
 }