Implement AppChooser portal

data/xapp.portal

@@ -1,4 +1,4 @@
 [portal]
 DBusName=org.freedesktop.impl.portal.desktop.xapp
-Interfaces=org.freedesktop.impl.portal.Wallpaper;org.freedesktop.impl.portal.Inhibit;org.freedesktop.impl.portal.Screenshot;org.freedesktop.impl.portal.Lockdown;org.freedesktop.impl.portal.Settings;org.freedesktop.impl.portal.Background;
+Interfaces=org.freedesktop.impl.portal.AppChooser;org.freedesktop.impl.portal.Wallpaper;org.freedesktop.impl.portal.Inhibit;org.freedesktop.impl.portal.Screenshot;org.freedesktop.impl.portal.Lockdown;org.freedesktop.impl.portal.Settings;org.freedesktop.impl.portal.Background;
 UseIn=X-Cinnamon;MATE;XFCE;

src/appchooser.c

@@ -0,0 +1,292 @@
+/*
+ * Copyright © 2016 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *       Matthias Clasen <mclasen@redhat.com>
+ */
+
+#define _GNU_SOURCE 1
+
+#include "config.h"
+
+#include "appchooser.h"
+#include "request.h"
+#include "utils.h"
+
+#include <string.h>
+
+#include <gtk/gtk.h>
+
+#include <gio/gio.h>
+#include <gio/gdesktopappinfo.h>
+#include <gio/gunixfdlist.h>
+
+#include <glib/gi18n.h>
+
+#include "xdg-desktop-portal-dbus.h"
+
+#include "appchooserdialog.h"
+#include "externalwindow.h"
+
+static GHashTable *handles;
+
+typedef struct {
+  XdpImplAppChooser *impl;
+  GDBusMethodInvocation *invocation;
+  Request *request;
+  GtkWidget *dialog;
+  ExternalWindow *external_parent;
+
+  char *chosen;
+  int response;
+
+} AppDialogHandle;
+
+static void
+app_dialog_handle_free (gpointer data)
+{
+  AppDialogHandle *handle = data;
+
+  g_hash_table_remove (handles, handle->request->id);
+  g_clear_object (&handle->external_parent);
+  g_object_unref (handle->request);
+  g_object_unref (handle->dialog);
+  g_free (handle->chosen);
+
+  g_free (handle);
+}
+
+static void
+app_dialog_handle_close (AppDialogHandle *handle)
+{
+  gtk_widget_destroy (handle->dialog);
+  app_dialog_handle_free (handle);
+}
+
+static void
+send_response (AppDialogHandle *handle)
+{
+  GVariantBuilder opt_builder;
+
+  g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);
+  g_variant_builder_add (&opt_builder, "{sv}", "choice", g_variant_new_string (handle->chosen ? handle->chosen : ""));
+
+  if (handle->request->exported)
+    request_unexport (handle->request);
+
+  xdp_impl_app_chooser_complete_choose_application (handle->impl,
+                                                    handle->invocation,
+                                                    handle->response,
+                                                    g_variant_builder_end (&opt_builder));
+
+  app_dialog_handle_close (handle);
+}
+
+static void
+handle_app_chooser_close (AppChooserDialog *dialog,
+                          gpointer data)
+{
+  AppDialogHandle *handle = data;
+  GAppInfo *info;
+
+  info = app_chooser_dialog_get_info (dialog);
+  if (info != NULL)
+    {
+      const char *desktop_id = g_app_info_get_id (info);
+      handle->response = 0;
+      if (desktop_id != NULL)
+        {
+          if (g_str_has_suffix (desktop_id, ".desktop"))
+            handle->chosen = g_strndup (desktop_id, strlen (desktop_id) - strlen (".desktop"));
+          else
+            handle->chosen = g_strdup (desktop_id);
+        }
+      else
+        {
+          handle->chosen = NULL;
+        }
+    }
+  else
+    {
+      handle->response = 1;
+      handle->chosen = NULL;
+    }
+
+  send_response (handle);
+}
+
+static gboolean
+handle_close (XdpImplRequest *object,
+              GDBusMethodInvocation *invocation,
+              AppDialogHandle *handle)
+{
+  GVariantBuilder opt_builder;
+
+  if (handle->request->exported)
+    request_unexport (handle->request);
+
+  g_variant_builder_init (&opt_builder, G_VARIANT_TYPE_VARDICT);
+  xdp_impl_app_chooser_complete_choose_application (handle->impl,
+                                                    handle->invocation,
+                                                    2,
+                                                    g_variant_builder_end (&opt_builder));
+
+  app_dialog_handle_close (handle);
+  xdp_impl_request_complete_close (object, invocation);
+
+  return TRUE;
+}
+
+static gboolean
+handle_choose_application (XdpImplAppChooser *object,
+                           GDBusMethodInvocation *invocation,
+                           const char *arg_handle,
+                           const char *arg_app_id,
+                           const char *arg_parent_window,
+                           const char **choices,
+                           GVariant *arg_options)
+{
+  g_autoptr(Request) request = NULL;
+  GtkWidget *dialog;
+  AppDialogHandle *handle;
+  const char *sender;
+  const char *latest_chosen_id;
+  const char *content_type;
+  const char *location;
+  gboolean modal;
+  GdkDisplay *display;
+  GdkScreen *screen;
+  ExternalWindow *external_parent = NULL;
+  GtkWidget *fake_parent;
+
+  sender = g_dbus_method_invocation_get_sender (invocation);
+
+  request = request_new (sender, arg_app_id, arg_handle);
+
+  if (!g_variant_lookup (arg_options, "last_choice", "&s", &latest_chosen_id))
+    latest_chosen_id = NULL;
+  if (!g_variant_lookup (arg_options, "modal", "b", &modal))
+    modal = TRUE;
+  if (!g_variant_lookup (arg_options, "content_type", "&s", &content_type))
+    content_type = NULL;
+  if (!g_variant_lookup (arg_options, "filename", "&s", &location) &&
+      !g_variant_lookup (arg_options, "uri", "&s", &location))
+    location = NULL;
+
+  if (arg_parent_window)
+    {
+      external_parent = create_external_window_from_handle (arg_parent_window);
+      if (!external_parent)
+        g_warning ("Failed to associate portal window with parent window %s",
+                   arg_parent_window);
+    }
+
+  if (external_parent)
+    display = external_window_get_display (external_parent);
+  else
+    display = gdk_display_get_default ();
+  screen = gdk_display_get_default_screen (display);
+
+  fake_parent = g_object_new (GTK_TYPE_WINDOW,
+                              "type", GTK_WINDOW_TOPLEVEL,
+                              "screen", screen,
+                              NULL);
+  g_object_ref_sink (fake_parent);
+
+  dialog = GTK_WIDGET (app_chooser_dialog_new (choices, latest_chosen_id, content_type, location));
+  gtk_window_set_transient_for (GTK_WINDOW (dialog), GTK_WINDOW (fake_parent));
+
+  gtk_window_set_modal (GTK_WINDOW (dialog), modal);
+
+  handle = g_new0 (AppDialogHandle, 1);
+  handle->impl = object;
+  handle->invocation = invocation;
+  handle->request = g_object_ref (request);
+  handle->dialog = g_object_ref (dialog);
+  handle->external_parent = external_parent;
+
+  g_hash_table_insert (handles, handle->request->id, handle);
+
+  g_signal_connect (request, "handle-close",
+                    G_CALLBACK (handle_close), handle);
+
+  g_signal_connect (dialog, "close",
+                    G_CALLBACK (handle_app_chooser_close), handle);
+
+  gtk_widget_realize (dialog);
+
+  if (external_parent)
+    external_window_set_parent_of (external_parent, gtk_widget_get_window (dialog));
+
+  gtk_window_present (GTK_WINDOW (dialog));
+
+  request_export (request, g_dbus_method_invocation_get_connection (invocation));
+
+  return TRUE;
+}
+
+static gboolean
+handle_update_choices (XdpImplAppChooser *object,
+                       GDBusMethodInvocation *invocation,
+                       const char *arg_handle,
+                       const char **choices)
+{
+  AppDialogHandle *handle;
+  g_autofree char *a = NULL;
+
+  handle = g_hash_table_lookup (handles, arg_handle);
+
+  if (handle == NULL)
+    {
+      g_dbus_method_invocation_return_error (invocation,
+                                             XDG_DESKTOP_PORTAL_ERROR,
+                                             XDG_DESKTOP_PORTAL_ERROR_NOT_FOUND,
+                                             "Request not found");
+      return TRUE;
+    }
+
+  g_debug ("Updating choices: %s\n", a = g_strjoinv (", ", (char **)choices));
+
+  app_chooser_dialog_update_choices (APP_CHOOSER_DIALOG (handle->dialog), choices);
+
+  g_dbus_method_invocation_return_value (invocation, NULL);
+
+  return TRUE;
+}
+
+gboolean
+app_chooser_init (GDBusConnection *bus,
+                  GError **error)
+{
+  GDBusInterfaceSkeleton *helper;
+
+  helper = G_DBUS_INTERFACE_SKELETON (xdp_impl_app_chooser_skeleton_new ());
+
+  g_signal_connect (helper, "handle-choose-application", G_CALLBACK (handle_choose_application), NULL);
+  g_signal_connect (helper, "handle-update-choices", G_CALLBACK (handle_update_choices), NULL);
+
+  if (!g_dbus_interface_skeleton_export (helper,
+                                         bus,
+                                         DESKTOP_PORTAL_OBJECT_PATH,
+                                         error))
+    return FALSE;
+
+  handles = g_hash_table_new (g_str_hash, g_str_equal);
+
+  g_debug ("providing %s", g_dbus_interface_skeleton_get_info (helper)->name);
+
+  return TRUE;
+}

src/appchooser.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2016 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 library. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *       Matthias Clasen <mclasen@redhat.com>
+ */
+
+#pragma once
+
+#include <gio/gio.h>
+
+gboolean app_chooser_init (GDBusConnection *bus, GError **error);