[epiphany/wip/downloads: 3/10] downloads: Add EphyDownloadsManager

[Carlos Garcia Campos <carlosgc src gnome org>]

commit bbf501f08b4cd3ee6570ea78a86573e648f83600
Author: Carlos Garcia Campos <cgarcia igalia com>
Date:   Wed Oct 7 10:29:42 2015 +0200

    downloads: Add EphyDownloadsManager
    
    It's a global manager provided by EphyEmbedShell that will be used to
    handle the downloads globally. Downloads are currently associated to a
    particular window.

 embed/Makefile.am              |    2 +
 embed/ephy-downloads-manager.c |  155 ++++++++++++++++++++++++++++++++++++++++
 embed/ephy-downloads-manager.h |   49 +++++++++++++
 embed/ephy-embed-shell.c       |   10 +++
 embed/ephy-embed-shell.h       |    2 +
 5 files changed, 218 insertions(+), 0 deletions(-)
---
diff --git a/embed/Makefile.am b/embed/Makefile.am
index cbfe392..8d54893 100644
--- a/embed/Makefile.am
+++ b/embed/Makefile.am
@@ -9,6 +9,7 @@ noinst_LTLIBRARIES = libephyembed.la
 
 NOINST_H_FILES = \
        ephy-about-handler.h            \
+       ephy-downloads-manager.h
        ephy-embed-dialog.h             \
        ephy-embed-private.h            \
        ephy-encoding.h                 \
@@ -34,6 +35,7 @@ BUILT_SOURCES = \
 
 libephyembed_la_SOURCES = \
        ephy-about-handler.c            \
+       ephy-downloads-manager.c        \
        ephy-download.c                 \
        ephy-embed.c                    \
        ephy-embed-container.c          \
diff --git a/embed/ephy-downloads-manager.c b/embed/ephy-downloads-manager.c
new file mode 100644
index 0000000..f8b54bb
--- /dev/null
+++ b/embed/ephy-downloads-manager.c
@@ -0,0 +1,155 @@
+/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ *  Copyright © 2015 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
+ *  the Free Software Foundation; either version 2, 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 "ephy-downloads-manager.h"
+
+enum {
+  DOWNLOAD_ADDED,
+  DOWNLOAD_REMOVED,
+
+  LAST_SIGNAL
+};
+
+struct _EphyDownloadsManager
+{
+  GObject parent;
+
+  GList *downloads;
+};
+
+struct _EphyDownloadsManagerClass
+{
+  GObjectClass parent_class;
+};
+
+static guint signals[LAST_SIGNAL];
+
+G_DEFINE_TYPE (EphyDownloadsManager, ephy_downloads_manager, G_TYPE_OBJECT)
+
+static void
+ephy_downloads_manager_init (EphyDownloadsManager *manager)
+{
+}
+
+static void
+ephy_downloads_manager_dispose (GObject *object)
+{
+  EphyDownloadsManager *manager = EPHY_DOWNLOADS_MANAGER (object);
+
+  g_list_free_full (manager->downloads, g_object_unref);
+
+  G_OBJECT_CLASS (ephy_downloads_manager_parent_class)->dispose (object);
+}
+
+static void
+ephy_downloads_manager_class_init (EphyDownloadsManagerClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->dispose = ephy_downloads_manager_dispose;
+
+  signals[DOWNLOAD_ADDED] =
+    g_signal_new ("download-added",
+                  EPHY_TYPE_DOWNLOADS_MANAGER,
+                  G_SIGNAL_RUN_LAST,
+                  0, NULL, NULL,
+                  g_cclosure_marshal_VOID__OBJECT,
+                  G_TYPE_NONE, 1,
+                  EPHY_TYPE_DOWNLOAD);
+
+  signals[DOWNLOAD_REMOVED] =
+    g_signal_new ("download-removed",
+                  EPHY_TYPE_DOWNLOADS_MANAGER,
+                  G_SIGNAL_RUN_LAST,
+                  0, NULL, NULL,
+                  g_cclosure_marshal_VOID__OBJECT,
+                  G_TYPE_NONE, 1,
+                  EPHY_TYPE_DOWNLOAD);
+}
+
+static void
+download_failed_cb (EphyDownload         *download,
+                    GError               *error,
+                    EphyDownloadsManager *manager)
+{
+  if (g_error_matches (error, WEBKIT_DOWNLOAD_ERROR, WEBKIT_DOWNLOAD_ERROR_CANCELLED_BY_USER))
+    ephy_downloads_manager_remove_download (manager, download);
+}
+
+void
+ephy_downloads_manager_add_download (EphyDownloadsManager *manager,
+                                     EphyDownload         *download)
+{
+  g_return_if_fail (EPHY_IS_DOWNLOADS_MANAGER (manager));
+  g_return_if_fail (EPHY_IS_DOWNLOAD (download));
+
+  if (g_list_find (manager->downloads, download))
+    return;
+
+  manager->downloads = g_list_prepend (manager->downloads, g_object_ref (download));
+  g_signal_connect (download, "error",
+                    G_CALLBACK (download_failed_cb),
+                    manager);
+  g_signal_emit (manager, signals[DOWNLOAD_ADDED], 0, download);
+}
+
+void
+ephy_downloads_manager_remove_download (EphyDownloadsManager *manager,
+                                        EphyDownload         *download)
+{
+  GList *download_link;
+
+  g_return_if_fail (EPHY_IS_DOWNLOADS_MANAGER (manager));
+  g_return_if_fail (EPHY_IS_DOWNLOAD (download));
+
+  download_link = g_list_find (manager->downloads, download);
+  if (!download_link)
+    return;
+
+  manager->downloads = g_list_remove_link (manager->downloads, download_link);
+  g_signal_emit (manager, signals[DOWNLOAD_REMOVED], 0, download);
+  g_list_free_full (download_link, g_object_unref);
+}
+
+gboolean
+ephy_downloads_manager_has_active_downloads (EphyDownloadsManager *manager)
+{
+  GList *l;
+
+  g_return_val_if_fail (EPHY_IS_DOWNLOADS_MANAGER (manager), FALSE);
+
+  for (l = manager->downloads; l; l = g_list_next (l)) {
+    EphyDownload *download = EPHY_DOWNLOAD (l->data);
+
+    if (ephy_download_is_active (download))
+      return TRUE;
+  }
+
+  return FALSE;
+}
+
+GList *
+ephy_downloads_manager_get_downloads (EphyDownloadsManager *manager)
+{
+  g_return_val_if_fail (EPHY_IS_DOWNLOADS_MANAGER (manager), NULL);
+
+  return manager->downloads;
+}
diff --git a/embed/ephy-downloads-manager.h b/embed/ephy-downloads-manager.h
new file mode 100644
index 0000000..2763807
--- /dev/null
+++ b/embed/ephy-downloads-manager.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ *  Copyright © 2015 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
+ *  the Free Software Foundation; either version 2, 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.
+ *
+ */
+
+#ifndef EPHY_DOWNLOADS_MANAGER_H
+#define EPHY_DOWNLOADS_MANAGER_H
+
+#include "ephy-download.h"
+
+G_BEGIN_DECLS
+
+#define EPHY_TYPE_DOWNLOADS_MANAGER         (ephy_downloads_manager_get_type ())
+#define EPHY_DOWNLOADS_MANAGER(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), EPHY_TYPE_DOWNLOADS_MANAGER, 
EphyDownloadsManager))
+#define EPHY_DOWNLOADS_MANAGER_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), EPHY_TYPE_DOWNLOADS_MANAGER, 
EphyDownloadsManagerClass))
+#define EPHY_IS_DOWNLOADS_MANAGER(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), EPHY_TYPE_DOWNLOADS_MANAGER))
+#define EPHY_IS_DOWNLOADS_MANAGER_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), EPHY_TYPE_DOWNLOADS_MANAGER))
+#define EPHY_DOWNLOADS_MANAGER_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), EPHY_TYPE_DOWNLOADS_MANAGER, 
EphyDownloadsManagerClass))
+
+typedef struct _EphyDownloadsManagerClass   EphyDownloadsManagerClass;
+typedef struct _EphyDownloadsManager        EphyDownloadsManager;
+
+GType    ephy_downloads_manager_get_type             (void);
+
+void     ephy_downloads_manager_add_download         (EphyDownloadsManager *manager,
+                                                      EphyDownload         *download);
+void     ephy_downloads_manager_remove_download      (EphyDownloadsManager *manager,
+                                                      EphyDownload         *download);
+gboolean ephy_downloads_manager_has_active_downloads (EphyDownloadsManager *manager);
+GList   *ephy_downloads_manager_get_downloads        (EphyDownloadsManager *manager);
+
+G_END_DECLS
+
+#endif /* EPHY_DOWNLOADS_MANAGER_H */
diff --git a/embed/ephy-embed-shell.c b/embed/ephy-embed-shell.c
index 5371744..eb7b3c6 100644
--- a/embed/ephy-embed-shell.c
+++ b/embed/ephy-embed-shell.c
@@ -57,6 +57,7 @@ struct _EphyEmbedShellPrivate
   GtkPrintSettings *print_settings;
   EphyEmbedShellMode mode;
   WebKitUserContentManager *user_content;
+  EphyDownloadsManager *downloads_manager;
   EphyAboutHandler *about_handler;
   guint update_overview_timeout_id;
   guint hiding_overview_item;
@@ -108,6 +109,7 @@ ephy_embed_shell_dispose (GObject *object)
   g_clear_object (&priv->global_history_service);
   g_clear_object (&priv->about_handler);
   g_clear_object (&priv->user_content);
+  g_clear_object (&priv->downloads_manager);
   g_clear_object (&priv->web_context);
 
   G_OBJECT_CLASS (ephy_embed_shell_parent_class)->dispose (object);
@@ -1129,3 +1131,11 @@ ephy_embed_shell_get_web_context (EphyEmbedShell *shell)
 {
   return shell->priv->web_context;
 }
+
+EphyDownloadsManager *
+ephy_embed_shell_get_downloads_manager (EphyEmbedShell *shell)
+{
+  if (!shell->priv->downloads_manager)
+    shell->priv->downloads_manager = EPHY_DOWNLOADS_MANAGER (g_object_new (EPHY_TYPE_DOWNLOADS_MANAGER, 
NULL));
+  return shell->priv->downloads_manager;
+}
diff --git a/embed/ephy-embed-shell.h b/embed/ephy-embed-shell.h
index ac695fe..499ac53 100644
--- a/embed/ephy-embed-shell.h
+++ b/embed/ephy-embed-shell.h
@@ -27,6 +27,7 @@
 #define EPHY_EMBED_SHELL_H
 
 #include <webkit2/webkit2.h>
+#include "ephy-downloads-manager.h"
 
 G_BEGIN_DECLS
 
@@ -96,6 +97,7 @@ void               ephy_embed_shell_set_thumbanil_path         (EphyEmbedShell
                                                                 time_t            mtime,
                                                                 const char       *path);
 WebKitUserContentManager *ephy_embed_shell_get_user_content_manager (EphyEmbedShell *shell);
+EphyDownloadsManager     *ephy_embed_shell_get_downloads_manager    (EphyEmbedShell *shell);
 
 G_END_DECLS