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[gnome-photos/wip/rishi/import-8: 3/6] Add PhotosDeviceItem

commit 65c421248a8ae679aadf2f9fa2c4833e62314914
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed Jan 24 11:56:53 2018 +0100

    Add PhotosDeviceItem
    
    This is meant to represent items present on an attached device. It
    specifies a separate location for thumbnails based on the details of
    the underlying GVolume.
    
    https://gitlab.gnome.org/GNOME/gnome-photos/issues/29

 src/Makefile.am          |   2 +
 src/photos-device-item.c | 458 +++++++++++++++++++++++++++++++++++++++++++++++
 src/photos-device-item.h |  35 ++++
 src/photos-utils.c       |   2 +
 4 files changed, 497 insertions(+)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 4642d801..d760de82 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -70,6 +70,8 @@ gnome_photos_SOURCES = \
        photos-delete-item-job.h \
        photos-delete-notification.c \
        photos-delete-notification.h \
+       photos-device-item.c \
+       photos-device-item.h \
        photos-dlna-renderer.c \
        photos-dlna-renderer.h \
        photos-dlna-renderers-dialog.c \
diff --git a/src/photos-device-item.c b/src/photos-device-item.c
new file mode 100644
index 00000000..c0e6ee97
--- /dev/null
+++ b/src/photos-device-item.c
@@ -0,0 +1,458 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2018 Red Hat, 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Based on code from:
+ *   + Documents
+ */
+
+
+#include "config.h"
+
+#include <dazzle.h>
+#include <gio/gio.h>
+#include <tracker-sparql.h>
+
+#include "photos-base-manager.h"
+#include "photos-device-item.h"
+#include "photos-error.h"
+#include "photos-filterable.h"
+#include "photos-glib.h"
+#include "photos-query.h"
+#include "photos-search-context.h"
+#include "photos-source.h"
+#include "photos-utils.h"
+
+
+struct _PhotosDeviceItem
+{
+  PhotosBaseItem parent_instance;
+  GCancellable *cancellable;
+  GVolume *volume;
+  PhotosBaseManager *src_mngr;
+};
+
+
+G_DEFINE_TYPE_WITH_CODE (PhotosDeviceItem, photos_device_item, PHOTOS_TYPE_BASE_ITEM,
+                         photos_utils_ensure_extension_points ();
+                         g_io_extension_point_implement (PHOTOS_BASE_ITEM_EXTENSION_POINT_NAME,
+                                                         g_define_type_id,
+                                                         "device",
+                                                         0));
+
+
+static GVolume *
+photos_device_item_get_volume_from_enclosing_mount (PhotosDeviceItem *self, GMount *enclosing_mount)
+{
+  g_autoptr (GVolume) volume = NULL;
+  GVolume *ret_val = NULL;
+
+  volume = g_mount_get_volume (enclosing_mount);
+  if (volume == NULL)
+    {
+      g_autoptr (GFile) enclosing_root = NULL;
+      guint i;
+      guint n_items;
+
+      enclosing_root = g_mount_get_root (enclosing_mount);
+
+      n_items = g_list_model_get_n_items (G_LIST_MODEL (self->src_mngr));
+      for (i = 0; i < n_items; i++)
+        {
+          g_autoptr (GFile) root = NULL;
+          GMount *mount;
+          g_autoptr (PhotosSource) source = NULL;
+
+          source = PHOTOS_SOURCE (g_list_model_get_object (G_LIST_MODEL (self->src_mngr), i));
+          mount = photos_source_get_mount (source);
+          if (mount == NULL)
+            continue;
+
+          root = g_mount_get_root (mount);
+          if (g_file_equal (enclosing_root, root))
+            {
+              volume = g_mount_get_volume (mount);
+              if (volume != NULL)
+                break;
+            }
+        }
+
+      if (volume == NULL)
+        {
+          for (i = 0; i < n_items; i++)
+            {
+              g_autoptr (GFile) root = NULL;
+              GMount *mount;
+              g_autoptr (PhotosSource) source = NULL;
+
+              source = PHOTOS_SOURCE (g_list_model_get_object (G_LIST_MODEL (self->src_mngr), i));
+              mount = photos_source_get_mount (source);
+              if (mount == NULL)
+                continue;
+
+              root = g_mount_get_root (mount);
+              if (g_file_has_prefix (root, enclosing_root))
+                {
+                  volume = g_mount_get_volume (mount);
+                  if (volume != NULL)
+                    break;
+                }
+            }
+        }
+    }
+
+  if (volume == NULL)
+    goto out;
+
+  ret_val = g_object_ref (volume);
+
+ out:
+  return ret_val;
+}
+
+
+static void
+photos_device_item_refresh_icon_find_enclosing_mount (GObject *source_object,
+                                                      GAsyncResult *res,
+                                                      gpointer user_data)
+{
+  PhotosDeviceItem *self;
+  GFile *file = G_FILE (source_object);
+  g_autoptr (GMount) mount = NULL;
+
+  {
+    g_autoptr (GError) error = NULL;
+
+    mount = g_file_find_enclosing_mount_finish (file, res, &error);
+    if (error != NULL)
+      {
+        if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+          goto out;
+
+        g_warning ("Unable to find enclosing mount: %s", error->message);
+      }
+  }
+
+  self = PHOTOS_DEVICE_ITEM (user_data);
+
+  g_clear_object (&self->volume);
+  if (mount != NULL)
+    {
+      self->volume = photos_device_item_get_volume_from_enclosing_mount (self, mount);
+      if (self->volume == NULL)
+        {
+          const gchar *id;
+
+          id = photos_filterable_get_id (PHOTOS_FILTERABLE (self));
+          g_warning ("Unable to find volume for %s", id);
+        }
+    }
+
+  PHOTOS_BASE_ITEM_CLASS (photos_device_item_parent_class)->refresh_icon (PHOTOS_BASE_ITEM (self));
+
+ out:
+  return;
+}
+
+
+static gboolean
+photos_device_item_source_widget_activate_link (GtkLinkButton *button, gpointer user_data)
+{
+  g_autoptr (GFile) file = NULL;
+  PhotosDeviceItem *self;
+  gboolean ret_val = GDK_EVENT_PROPAGATE;
+  const gchar *uri;
+
+  g_return_val_if_fail (GTK_IS_LINK_BUTTON (button), GDK_EVENT_PROPAGATE);
+  g_return_val_if_fail (PHOTOS_IS_DEVICE_ITEM (user_data), GDK_EVENT_PROPAGATE);
+
+  self = PHOTOS_DEVICE_ITEM (user_data);
+
+  uri = photos_base_item_get_uri (PHOTOS_BASE_ITEM (self));
+  file = g_file_new_for_uri (uri);
+
+  {
+    g_autoptr (GError) error = NULL;
+
+    if (!dzl_file_manager_show (file, &error))
+      {
+        g_warning ("Unable to use org.freedesktop.FileManager1 for %s: %s", uri, error->message);
+        goto out;
+      }
+  }
+
+  ret_val = GDK_EVENT_STOP;
+
+ out:
+  return ret_val;
+}
+
+
+static gchar *
+photos_device_item_create_filename_fallback (PhotosBaseItem *item)
+{
+  g_warn_if_reached ();
+  return NULL;
+}
+
+
+static gchar *
+photos_device_item_create_name_fallback (PhotosBaseItem *item)
+{
+  const gchar *filename;
+  gchar *ret_val;
+
+  filename = photos_base_item_get_filename (item);
+  ret_val = photos_glib_filename_strip_extension (filename);
+  return ret_val;
+}
+
+
+static gboolean
+photos_device_item_create_thumbnail (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (item);
+  g_autoptr (GFile) file = NULL;
+  GQuark orientation;
+  gboolean ret_val = FALSE;
+  g_autofree gchar *thumbnail_path = NULL;
+  const gchar *mime_type;
+  const gchar *uri;
+  gint64 height;
+  gint64 mtime;
+  gint64 width;
+
+  uri = photos_base_item_get_uri (PHOTOS_BASE_ITEM (self));
+  file = g_file_new_for_uri (uri);
+  mime_type = photos_base_item_get_mime_type (PHOTOS_BASE_ITEM (self));
+  mtime = photos_base_item_get_mtime (PHOTOS_BASE_ITEM (self));
+  orientation = photos_base_item_get_orientation (PHOTOS_BASE_ITEM (self));
+  height = photos_base_item_get_height (PHOTOS_BASE_ITEM (self));
+  width = photos_base_item_get_width (PHOTOS_BASE_ITEM (self));
+  thumbnail_path = photos_base_item_create_thumbnail_path (PHOTOS_BASE_ITEM (self));
+
+  if (!photos_utils_create_thumbnail (file,
+                                      mime_type,
+                                      mtime,
+                                      orientation,
+                                      height,
+                                      width,
+                                      "",
+                                      thumbnail_path,
+                                      cancellable,
+                                      error))
+    goto out;
+
+  ret_val = TRUE;
+
+ out:
+  return ret_val;
+}
+
+
+static gchar *
+photos_device_item_create_thumbnail_path (PhotosBaseItem *item)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (item);
+  g_autofree gchar *device_dir = NULL;
+  g_autofree gchar *path_default = NULL;
+  g_autofree gchar *path_default_basename = NULL;
+  g_autofree gchar *path_default_dir = NULL;
+  g_autofree gchar *uuid = NULL;
+  gchar *path = NULL;
+
+  path_default
+    = PHOTOS_BASE_ITEM_CLASS (photos_device_item_parent_class)->create_thumbnail_path (PHOTOS_BASE_ITEM 
(self));
+
+  path_default_basename = g_path_get_basename (path_default);
+  path_default_dir = g_path_get_dirname (path_default);
+
+  if (self->volume == NULL)
+    {
+      device_dir = g_strdup ("unknown");
+      goto out;
+    }
+
+  uuid = g_volume_get_uuid (self->volume);
+  if (uuid == NULL || uuid[0] == '\0')
+    {
+      device_dir = g_strdup ("unknown");
+      goto out;
+    }
+
+  device_dir = g_steal_pointer (&uuid);
+
+ out:
+  path = g_build_filename (path_default_dir, "devices", device_dir, path_default_basename, NULL);
+  return path;
+}
+
+
+static gchar *
+photos_device_item_download (PhotosBaseItem *item, GCancellable *cancellable, GError **error)
+{
+  g_assert_not_reached ();
+  return NULL;
+}
+
+
+static GtkWidget *
+photos_device_item_get_source_widget (PhotosBaseItem *item)
+{
+  g_autoptr (GFile) file = NULL;
+  g_autoptr (GFile) source_link = NULL;
+  GtkWidget *label;
+  GtkWidget *source_widget;
+  const gchar *uri;
+  g_autofree gchar *source_path = NULL;
+  g_autofree gchar *source_uri = NULL;
+
+  g_return_val_if_fail (!photos_base_item_is_collection (item), NULL);
+
+  uri = photos_base_item_get_uri (item);
+  file = g_file_new_for_uri (uri);
+  source_link = g_file_get_parent (file);
+  source_path = g_file_get_path (source_link);
+  source_uri = g_file_get_uri (source_link);
+
+  source_widget = gtk_link_button_new_with_label (source_uri, source_path);
+  gtk_widget_set_halign (source_widget, GTK_ALIGN_START);
+  g_signal_connect_object (source_widget,
+                           "activate-link",
+                           G_CALLBACK (photos_device_item_source_widget_activate_link),
+                           item,
+                           0);
+
+  label = gtk_bin_get_child (GTK_BIN (source_widget));
+  gtk_label_set_ellipsize (GTK_LABEL (label), PANGO_ELLIPSIZE_END);
+  gtk_label_set_max_width_chars (GTK_LABEL (label), 40);
+
+  return source_widget;
+}
+
+
+static gboolean
+photos_device_item_metadata_add_shared (PhotosBaseItem  *item,
+                                        const gchar     *provider_type,
+                                        const gchar     *account_identity,
+                                        const gchar     *shared_id,
+                                        GCancellable    *cancellable,
+                                        GError         **error)
+{
+  g_assert_not_reached ();
+  return FALSE;
+}
+
+
+static void
+photos_device_item_refresh_icon (PhotosBaseItem *item)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (item);
+  g_autoptr (GFile) file = NULL;
+  const gchar *uri;
+
+  g_cancellable_cancel (self->cancellable);
+  g_clear_object (&self->cancellable);
+  self->cancellable = g_cancellable_new ();
+
+  uri = photos_base_item_get_uri (item);
+  file = g_file_new_for_uri (uri);
+  g_file_find_enclosing_mount_async (file,
+                                     G_PRIORITY_DEFAULT,
+                                     self->cancellable,
+                                     photos_device_item_refresh_icon_find_enclosing_mount,
+                                     self);
+}
+
+
+static void
+photos_device_item_trash (PhotosBaseItem *item)
+{
+  g_assert_not_reached ();
+}
+
+
+static void
+photos_device_item_constructed (GObject *object)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (object);
+  const gchar *mime_type;
+
+  G_OBJECT_CLASS (photos_device_item_parent_class)->constructed (object);
+
+  mime_type = photos_base_item_get_mime_type (PHOTOS_BASE_ITEM (self));
+  if (mime_type != NULL)
+    {
+      g_autoptr (GAppInfo) default_app = NULL;
+
+      default_app = g_app_info_get_default_for_type (mime_type, FALSE);
+      if (default_app != NULL)
+        photos_base_item_set_default_app (PHOTOS_BASE_ITEM (self), default_app);
+    }
+}
+
+
+static void
+photos_device_item_dispose (GObject *object)
+{
+  PhotosDeviceItem *self = PHOTOS_DEVICE_ITEM (object);
+
+  if (self->cancellable != NULL)
+    {
+      g_cancellable_cancel (self->cancellable);
+      g_clear_object (&self->cancellable);
+    }
+
+  g_clear_object (&self->volume);
+  g_clear_object (&self->src_mngr);
+
+  G_OBJECT_CLASS (photos_device_item_parent_class)->dispose (object);
+}
+
+
+static void
+photos_device_item_init (PhotosDeviceItem *self)
+{
+  GApplication *app;
+  PhotosSearchContextState *state;
+
+  app = g_application_get_default ();
+  state = photos_search_context_get_state (PHOTOS_SEARCH_CONTEXT (app));
+
+  self->cancellable = g_cancellable_new ();
+  self->src_mngr = g_object_ref (state->src_mngr);
+}
+
+
+static void
+photos_device_item_class_init (PhotosDeviceItemClass *class)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (class);
+  PhotosBaseItemClass *base_item_class = PHOTOS_BASE_ITEM_CLASS (class);
+
+  object_class->constructed = photos_device_item_constructed;
+  object_class->dispose = photos_device_item_dispose;
+  base_item_class->create_filename_fallback = photos_device_item_create_filename_fallback;
+  base_item_class->create_name_fallback = photos_device_item_create_name_fallback;
+  base_item_class->create_thumbnail = photos_device_item_create_thumbnail;
+  base_item_class->create_thumbnail_path = photos_device_item_create_thumbnail_path;
+  base_item_class->download = photos_device_item_download;
+  base_item_class->get_source_widget = photos_device_item_get_source_widget;
+  base_item_class->metadata_add_shared = photos_device_item_metadata_add_shared;
+  base_item_class->refresh_icon = photos_device_item_refresh_icon;
+  base_item_class->trash = photos_device_item_trash;
+}
diff --git a/src/photos-device-item.h b/src/photos-device-item.h
new file mode 100644
index 00000000..b5f27c06
--- /dev/null
+++ b/src/photos-device-item.h
@@ -0,0 +1,35 @@
+/*
+ * Photos - access, organize and share your photos on GNOME
+ * Copyright © 2018 Red Hat, 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Based on code from:
+ *   + Documents
+ */
+
+#ifndef PHOTOS_DEVICE_ITEM_H
+#define PHOTOS_DEVICE_ITEM_H
+
+#include "photos-base-item.h"
+
+G_BEGIN_DECLS
+
+#define PHOTOS_TYPE_DEVICE_ITEM (photos_device_item_get_type ())
+G_DECLARE_FINAL_TYPE (PhotosDeviceItem, photos_device_item, PHOTOS, DEVICE_ITEM, PhotosBaseItem);
+
+G_END_DECLS
+
+#endif /* PHOTOS_DEVICE_ITEM_H */
diff --git a/src/photos-utils.c b/src/photos-utils.c
index 96abdbe8..c129ebc5 100644
--- a/src/photos-utils.c
+++ b/src/photos-utils.c
@@ -32,6 +32,7 @@
 #include <libgd/gd.h>
 
 #include "photos-application.h"
+#include "photos-device-item.h"
 #include "photos-enums.h"
 #include "photos-error.h"
 #include "photos-facebook-item.h"
@@ -690,6 +691,7 @@ photos_utils_ensure_builtins (void)
 
   if (g_once_init_enter (&once_init_value))
     {
+      g_type_ensure (PHOTOS_TYPE_DEVICE_ITEM);
       g_type_ensure (PHOTOS_TYPE_FACEBOOK_ITEM);
       g_type_ensure (PHOTOS_TYPE_FLICKR_ITEM);
       g_type_ensure (PHOTOS_TYPE_GOOGLE_ITEM);
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