[gnome-chat] utils: Add methods for getting the avatar

[Debarshi Ray <debarshir src gnome org>]

commit 04b8cb836dd7001b095addcaac2e3d6dc83655e5
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Sep 13 15:04:04 2013 +0200

    utils: Add methods for getting the avatar
    
    These are going to be used by both ChatContactsListDialog and
    ChatConversationsList.

 src/Makefile.am      |    2 +
 src/chat-constants.h |    1 +
 src/chat-utils.c     |  139 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/chat-utils.h     |   42 +++++++++++++++
 4 files changed, 184 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index caee1d0..897c0b9 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -44,6 +44,8 @@ gnome_chat_SOURCES = \
        chat-mode-controller.h \
        chat-settings.c \
        chat-settings.h \
+       chat-utils.c \
+       chat-utils.h \
        chat-main.c \
        $(NULL)
 
diff --git a/src/chat-constants.h b/src/chat-constants.h
index 2994cdc..4ab003b 100644
--- a/src/chat-constants.h
+++ b/src/chat-constants.h
@@ -26,6 +26,7 @@ G_BEGIN_DECLS
 
 enum
 {
+  CHAT_AVATAR_SIZE = 32, /* pixels */
   CHAT_SELF_AVATAR_SIZE = 32 /* pixels */
 };
 
diff --git a/src/chat-utils.c b/src/chat-utils.c
new file mode 100644
index 0000000..d00574f
--- /dev/null
+++ b/src/chat-utils.c
@@ -0,0 +1,139 @@
+/*
+ * Chat - instant messaging client for GNOME
+ * Copyright © 2013 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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 <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "chat-constants.h"
+#include "chat-utils.h"
+
+
+static void
+chat_utils_get_contact_avatar_pixbuf (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+  GTask *task = G_TASK (user_data);
+  GdkPixbuf *pixbuf;
+  GError *error;
+  GtkWidget *image;
+
+  error = NULL;
+  pixbuf = gdk_pixbuf_new_from_stream_finish (res, &error);
+  if (error != NULL)
+    {
+      g_task_return_error (task, error);
+      goto out;
+    }
+
+  image = gtk_image_new_from_pixbuf (pixbuf);
+  g_task_return_pointer (task, g_object_ref_sink (image), g_object_unref);
+
+ out:
+  g_object_unref (task);
+}
+
+static void
+chat_utils_get_contact_avatar_file_read (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+  GFile *file = G_FILE (source_object);
+  GTask *task = G_TASK (user_data);
+  GCancellable *cancellable;
+  GFileInputStream *stream;
+  GError *error;
+
+  error = NULL;
+  stream = g_file_read_finish (file, res, &error);
+  if (error != NULL)
+    {
+      g_task_return_error (task, error);
+      goto out;
+    }
+
+  cancellable = g_task_get_cancellable (task);
+  gdk_pixbuf_new_from_stream_at_scale_async (G_INPUT_STREAM (stream),
+                                             CHAT_AVATAR_SIZE,
+                                             CHAT_AVATAR_SIZE,
+                                             TRUE,
+                                             cancellable,
+                                             chat_utils_get_contact_avatar_pixbuf,
+                                             g_object_ref (task));
+
+ out:
+  g_object_unref (task);
+}
+
+
+void
+chat_utils_get_contact_avatar (TpContact *contact,
+                               GCancellable *cancellable,
+                               GAsyncReadyCallback callback,
+                               gpointer user_data)
+{
+  GFile *file;
+  GTask *task;
+
+  task = g_task_new (contact, cancellable, callback, user_data);
+  g_task_set_check_cancellable (task, TRUE);
+  g_task_set_source_tag (task, chat_utils_get_contact_avatar);
+
+  file = tp_contact_get_avatar_file (contact);
+  if (file == NULL)
+    {
+      GtkImage *image;
+
+      image = chat_utils_get_contact_avatar_default ();
+      g_task_return_pointer (task, g_object_ref_sink (image), g_object_unref);
+      goto out;
+    }
+
+  g_file_read_async (file,
+                     G_PRIORITY_DEFAULT,
+                     cancellable,
+                     chat_utils_get_contact_avatar_file_read,
+                     g_object_ref (task));
+
+ out:
+  g_object_unref (task);
+}
+
+
+GtkImage *
+chat_utils_get_contact_avatar_finish (TpContact *contact, GAsyncResult *res, GError **error)
+{
+  GTask *task = G_TASK (res);
+
+  g_return_val_if_fail (g_task_is_valid (res, contact), NULL);
+  g_return_val_if_fail (g_task_get_source_tag (task) == chat_utils_get_contact_avatar, NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  return g_task_propagate_pointer (task, error);
+}
+
+
+GtkImage *
+chat_utils_get_contact_avatar_default (void)
+{
+  GtkWidget *image;
+
+  image = gtk_image_new_from_icon_name ("avatar-default-symbolic", GTK_ICON_SIZE_INVALID);
+  gtk_image_set_pixel_size (GTK_IMAGE (image), CHAT_AVATAR_SIZE);
+  return GTK_IMAGE (image);
+}
diff --git a/src/chat-utils.h b/src/chat-utils.h
new file mode 100644
index 0000000..a3ac0c5
--- /dev/null
+++ b/src/chat-utils.h
@@ -0,0 +1,42 @@
+/*
+ * Chat - instant messaging client for GNOME
+ * Copyright © 2013 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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 CHAT_UTILS_H
+#define CHAT_UTILS_H
+
+#include <gio/gio.h>
+#include <gtk/gtk.h>
+#include <telepathy-glib/telepathy-glib.h>
+
+G_BEGIN_DECLS
+
+void            chat_utils_get_contact_avatar            (TpContact *contact,
+                                                          GCancellable *cancellable,
+                                                          GAsyncReadyCallback callback,
+                                                          gpointer user_data);
+
+GtkImage       *chat_utils_get_contact_avatar_finish     (TpContact *contact, GAsyncResult *res, GError 
**error);
+
+GtkImage       *chat_utils_get_contact_avatar_default    (void);
+
+G_END_DECLS
+
+#endif /* CHAT_UTILS_H */