Revert 151353 - Panels refactor: Support browserless panels on Linux.

chrome/browser/ui/gtk/gtk_util.cc

Index: chrome/browser/ui/gtk/gtk_util.cc
===================================================================
--- chrome/browser/ui/gtk/gtk_util.cc	(revision 151356)
+++ chrome/browser/ui/gtk/gtk_util.cc	(working copy)
@@ -25,9 +25,12 @@
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
 #include "googleurl/src/gurl.h"
 #include "grit/theme_resources.h"
 #include "ui/base/gtk/gtk_compat.h"
@@ -45,6 +48,9 @@
 // These conflict with base/tracked_objects.h, so need to come last.
 #include <gdk/gdkx.h>  // NOLINT
 
+using content::RenderWidgetHost;
+using content::WebContents;
+
 namespace {
 
 #if defined(GOOGLE_CHROME_BUILD)
@@ -272,6 +278,16 @@
   return TRUE;
 }
 
+WebContents* GetBrowserWindowSelectedWebContents(BrowserWindow* window) {
+  BrowserWindowGtk* browser_window = static_cast<BrowserWindowGtk*>(
+      window);
+  return chrome::GetActiveWebContents(browser_window->browser());
+}
+
+GtkWidget* GetBrowserWindowFocusedWidget(BrowserWindow* window) {
+  return gtk_window_get_focus(window->GetNativeWindow());
+}
+
 }  // namespace
 
 namespace gtk_util {
@@ -992,4 +1008,38 @@
   }
 }
 
+// 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(BrowserWindow* window,
+                    void (RenderWidgetHost::*method)(),
+                    const char* signal) {
+  GtkWidget* widget = GetBrowserWindowFocusedWidget(window);
+  if (widget == NULL)
+    return;  // Do nothing if no focused widget.
+
+  WebContents* current_tab = GetBrowserWindowSelectedWebContents(window);
+  if (current_tab && widget == current_tab->GetContentNativeView()) {
+    (current_tab->GetRenderViewHost()->*method)();
+  } else {
+    guint id;
+    if ((id = g_signal_lookup(signal, G_OBJECT_TYPE(widget))) != 0)
+      g_signal_emit(widget, id, 0);
+  }
+}
+
+void DoCut(BrowserWindow* window) {
+  DoCutCopyPaste(window, &RenderWidgetHost::Cut, "cut-clipboard");
+}
+
+void DoCopy(BrowserWindow* window) {
+  DoCutCopyPaste(window, &RenderWidgetHost::Copy, "copy-clipboard");
+}
+
+void DoPaste(BrowserWindow* window) {
+  DoCutCopyPaste(window, &RenderWidgetHost::Paste, "paste-clipboard");
+}
+
 }  // namespace gtk_util