Linux: middle-click to navigate

chrome/browser/tab_contents/tab_contents_view_gtk.cc

Index: chrome/browser/tab_contents/tab_contents_view_gtk.cc
diff --git a/chrome/browser/tab_contents/tab_contents_view_gtk.cc b/chrome/browser/tab_contents/tab_contents_view_gtk.cc
index 0ad9d9a20733be91197d83305f25cad40cc28ea8..3507cabc8194869e6bb0a92a78758cddb44271e0 100644
--- a/chrome/browser/tab_contents/tab_contents_view_gtk.cc
+++ b/chrome/browser/tab_contents/tab_contents_view_gtk.cc
@@ -28,6 +28,10 @@
 #include "chrome/common/gtk_util.h"
 #include "chrome/common/notification_source.h"
 #include "chrome/common/notification_type.h"
+#include "webkit/api/public/WebInputEvent.h"
+
+using WebKit::WebInputEvent;
+using WebKit::WebMouseEvent;
 
 namespace {
 
@@ -108,7 +112,8 @@ TabContentsViewGtk::TabContentsViewGtk(TabContents* tab_contents)
     : TabContentsView(tab_contents),
       floating_(gtk_floating_container_new()),
       fixed_(gtk_fixed_new()),
-      popup_view_(NULL) {
+      popup_view_(NULL),
+      outstanding_clipboard_contents_request_(NULL) {
   g_signal_connect(fixed_, "size-allocate",
                    G_CALLBACK(OnSizeAllocate), this);
   g_signal_connect(floating_.get(), "set-floating-position",
@@ -123,6 +128,8 @@ TabContentsViewGtk::TabContentsViewGtk(TabContents* tab_contents)
 
 TabContentsViewGtk::~TabContentsViewGtk() {
   floating_.Destroy();
+  if (outstanding_clipboard_contents_request_)
+    outstanding_clipboard_contents_request_->Cancel();
 }
 
 void TabContentsViewGtk::AttachBlockedPopupView(
@@ -323,6 +330,64 @@ void TabContentsViewGtk::HandleKeyboardEvent(
       static_cast<GdkModifierType>(event.os_event->state));
 }
 
+TabContentsViewGtk::ClipboardRequestCallback::ClipboardRequestCallback(
+    TabContentsViewGtk* tab_contents_view)
+    : tab_contents_view_(tab_contents_view) {
+}
+
+void TabContentsViewGtk::ClipboardRequestCallback::Cancel() {
+  tab_contents_view_ = NULL;
+}
+
+void TabContentsViewGtk::ClipboardRequestCallback::Callback(
+    const gchar* utf8_string) {
+  if (tab_contents_view_)
+    tab_contents_view_->ClipboardContentsReceived(utf8_string);
+
+  delete this;
+}
+
+static void ClipboardCallback(GtkClipboard *clipboard,
+                              const gchar *utf8_string,
+                              gpointer arg) {
+  TabContentsViewGtk::ClipboardRequestCallback* callback =
+    reinterpret_cast<TabContentsViewGtk::ClipboardRequestCallback*>(arg);
+  callback->Callback(utf8_string);
+}
+
+void TabContentsViewGtk::HandleMouseButtonEvent(const WebMouseEvent* event) {
+  // We only trigger on middle-button up with Control held down.
+  if (event->type != WebInputEvent::MouseUp ||
+      event->button != WebMouseEvent::ButtonMiddle ||
+      (event->modifiers & WebInputEvent::ControlKey) == 0 ||
+      event->modifiers & WebInputEvent::ShiftKey ||
+      event->modifiers & WebInputEvent::AltKey ||
+      event->modifiers & WebInputEvent::MetaKey ||
+      outstanding_clipboard_contents_request_) {
+    return;
+  }
+
+  outstanding_clipboard_contents_request_ = new ClipboardRequestCallback(this);
+  GtkClipboard* x_clipboard = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
+  gtk_clipboard_request_text(x_clipboard, ClipboardCallback,
+                             outstanding_clipboard_contents_request_);
+}
+
+void TabContentsViewGtk::ClipboardContentsReceived(const gchar* utf8_contents) {
+  outstanding_clipboard_contents_request_ = NULL;
+  if (!utf8_contents)
+    return;
+
+  GURL target(utf8_contents);
+  if (!target.is_valid())
+    target = GURL(std::string("http://") + utf8_contents);
+  if (!target.is_valid())
+    return;
+
+  tab_contents()->RequestOpenURL(target, GURL() /* referrer */,
+                                 NEW_FOREGROUND_TAB);
+}
+
 void TabContentsViewGtk::Observe(NotificationType type,
                                  const NotificationSource& source,
                                  const NotificationDetails& details) {