shew: Add small library for dealing with external windows

In order to support OpenExtensionPrefs()'s parentWindow parameter, we will need the ability to make a window transient to an external window identified by a string handle. This takes the corresponding code from xdg-desktop-portal-gtk and brings it into an introspectable form, likewise the counterpart in libportal to export a string handle for a GtkWindow. https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1087
2020-03-05 04:52:09 +01:00
parent f971b8426d
commit 6baf490aab
14 changed files with 1364 additions and 0 deletions
--- a/subprojects/shew/src/shew-external-window.c
+++ b/subprojects/shew/src/shew-external-window.c
@ -0,0 +1,161 @@
+/*
+ * 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:
+ *       Jonas Ådahl <jadahl@redhat.com>
+ */
+
+#include <string.h>
+
+#include "shew-external-window.h"
+#include "shew-external-window-x11.h"
+#include "shew-external-window-wayland.h"
+
+enum
+{
+  PROP_0,
+
+  PROP_DISPLAY,
+};
+
+typedef struct _ShewExternalWindowPrivate
+{
+  GdkDisplay *display;
+} ShewExternalWindowPrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (ShewExternalWindow, shew_external_window, G_TYPE_OBJECT)
+
+ShewExternalWindow *
+shew_external_window_new_from_handle (const char *handle_str)
+{
+#ifdef GDK_WINDOWING_X11
+    {
+      const char x11_prefix[] = "x11:";
+      if (g_str_has_prefix (handle_str, x11_prefix))
+        {
+          ShewExternalWindowX11 *external_window_x11;
+          const char *x11_handle_str = handle_str + strlen (x11_prefix);
+
+          external_window_x11 = shew_external_window_x11_new (x11_handle_str);
+          return SHEW_EXTERNAL_WINDOW (external_window_x11);
+        }
+    }
+#endif
+#ifdef GDK_WINDOWING_WAYLAND
+    {
+      const char wayland_prefix[] = "wayland:";
+      if (g_str_has_prefix (handle_str, wayland_prefix))
+        {
+          ShewExternalWindowWayland *external_window_wayland;
+          const char *wayland_handle_str = handle_str + strlen (wayland_prefix);
+
+          external_window_wayland =
+            shew_external_window_wayland_new (wayland_handle_str);
+          return SHEW_EXTERNAL_WINDOW (external_window_wayland);
+        }
+    }
+#endif
+
+  g_warning ("Unhandled parent window type %s\n", handle_str);
+  return NULL;
+}
+
+void
+shew_external_window_set_parent_of (ShewExternalWindow *external_window,
+                                    GdkWindow          *child_window)
+{
+  SHEW_EXTERNAL_WINDOW_GET_CLASS (external_window)->set_parent_of (external_window,
+                                                                   child_window);
+}
+
+/**
+ * shew_external_window_get_display:
+ * Returns: (transfer none)
+ */
+GdkDisplay *
+shew_external_window_get_display (ShewExternalWindow *external_window)
+{
+  ShewExternalWindowPrivate *priv =
+    shew_external_window_get_instance_private (external_window);
+
+  return priv->display;
+}
+
+static void
+shew_external_window_set_property (GObject      *object,
+                                   guint         prop_id,
+                                   const GValue *value,
+                                   GParamSpec   *pspec)
+{
+  ShewExternalWindow *external_window = SHEW_EXTERNAL_WINDOW (object);
+  ShewExternalWindowPrivate *priv =
+    shew_external_window_get_instance_private (external_window);
+
+  switch (prop_id)
+    {
+    case PROP_DISPLAY:
+      g_set_object (&priv->display, g_value_get_object (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+shew_external_window_get_property (GObject    *object,
+                                   guint       prop_id,
+                                   GValue     *value,
+                                   GParamSpec *pspec)
+{
+  ShewExternalWindow *external_window = SHEW_EXTERNAL_WINDOW (object);
+  ShewExternalWindowPrivate *priv =
+    shew_external_window_get_instance_private (external_window);
+
+  switch (prop_id)
+    {
+    case PROP_DISPLAY:
+      g_value_set_object (value, priv->display);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+shew_external_window_init (ShewExternalWindow *external_window)
+{
+}
+
+static void
+shew_external_window_class_init (ShewExternalWindowClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->get_property = shew_external_window_get_property;
+  object_class->set_property = shew_external_window_set_property;
+
+  g_object_class_install_property (object_class,
+                                   PROP_DISPLAY,
+                                   g_param_spec_object ("display",
+                                                        "GdkDisplay",
+                                                        "The GdkDisplay instance",
+                                                        GDK_TYPE_DISPLAY,
+                                                        G_PARAM_READWRITE |
+                                                        G_PARAM_CONSTRUCT_ONLY |
+                                                        G_PARAM_STATIC_STRINGS));
+}