Panels refactor: Support browserless panels on Linux.

chrome/browser/ui/gtk/gtk_window_util.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/gtk/gtk_window_util.h"
+
+#include <dlfcn.h>
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+
+using content::RenderWidgetHost;
+using content::WebContents;
+
+namespace gtk_window_util {
+
+// Performs Cut/Copy/Paste operation on the |window|.
+// If the current render view is focused, then just call the specified |method|
+// against the current render view host, otherwise emit the specified |signal|
+// against the focused widget.
+// TODO(suzhe): This approach does not work for plugins.
+void DoCutCopyPaste(GtkWindow* window,
+                    WebContents* web_contents,
+                    void (RenderWidgetHost::*method)(),
+                    const char* signal) {
+  GtkWidget* widget = gtk_window_get_focus(window);
+  if (widget == NULL)
+    return;  // Do nothing if no focused widget.
+
+  if (web_contents && widget == web_contents->GetContentNativeView()) {
+    (web_contents->GetRenderViewHost()->*method)();
+  } else {
+    guint id;
+    if ((id = g_signal_lookup(signal, G_OBJECT_TYPE(widget))) != 0)
+      g_signal_emit(widget, id, 0);
+  }
+}
+
+void DoCut(GtkWindow* window, WebContents* web_contents) {
+  DoCutCopyPaste(window, web_contents,
+                 &RenderWidgetHost::Cut, "cut-clipboard");
+}
+
+void DoCopy(GtkWindow* window, WebContents* web_contents) {
+  DoCutCopyPaste(window, web_contents,
+                 &RenderWidgetHost::Copy, "copy-clipboard");
+}
+
+void DoPaste(GtkWindow* window, WebContents* web_contents) {
+  DoCutCopyPaste(window, web_contents,
+                 &RenderWidgetHost::Paste, "paste-clipboard");
+}
+
+// Ubuntu patches their version of GTK+ so that there is always a
+// gripper in the bottom right corner of the window. We dynamically
+// look up this symbol because it's a non-standard Ubuntu extension to
+// GTK+. We always need to disable this feature since we can't
+// communicate this to WebKit easily.
+typedef void (*gtk_window_set_has_resize_grip_func)(GtkWindow*, gboolean);
+gtk_window_set_has_resize_grip_func gtk_window_set_has_resize_grip_sym;
+
+void DisableResizeGrip(GtkWindow* window) {
+  static bool resize_grip_looked_up = false;
+  if (!resize_grip_looked_up) {
+    resize_grip_looked_up = true;
+    gtk_window_set_has_resize_grip_sym =
+        reinterpret_cast<gtk_window_set_has_resize_grip_func>(
+            dlsym(NULL, "gtk_window_set_has_resize_grip"));
+  }
+  if (gtk_window_set_has_resize_grip_sym)
+    gtk_window_set_has_resize_grip_sym(window, FALSE);
+}
+
+GdkCursorType GdkWindowEdgeToGdkCursorType(GdkWindowEdge edge) {
+  switch (edge) {
+    case GDK_WINDOW_EDGE_NORTH_WEST:
+      return GDK_TOP_LEFT_CORNER;
+    case GDK_WINDOW_EDGE_NORTH:
+      return GDK_TOP_SIDE;
+    case GDK_WINDOW_EDGE_NORTH_EAST:
+      return GDK_TOP_RIGHT_CORNER;
+    case GDK_WINDOW_EDGE_WEST:
+      return GDK_LEFT_SIDE;
+    case GDK_WINDOW_EDGE_EAST:
+      return GDK_RIGHT_SIDE;
+    case GDK_WINDOW_EDGE_SOUTH_WEST:
+      return GDK_BOTTOM_LEFT_CORNER;
+    case GDK_WINDOW_EDGE_SOUTH:
+      return GDK_BOTTOM_SIDE;
+    case GDK_WINDOW_EDGE_SOUTH_EAST:
+      return GDK_BOTTOM_RIGHT_CORNER;
+    default:
+      NOTREACHED();
+  }
+  return GDK_LAST_CURSOR;
+}
+
+}  // namespace gtk_window_util