aura-x11: Add custom web cursor support.

ui/aura/root_window_host_linux.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 "ui/aura/root_window_host_linux.h"
 
 #include <X11/cursorfont.h>
 #include <X11/extensions/XInput2.h>
 #include <algorithm>
 
@@ skipping 134 matching lines @@
     case aura::kCursorAlias:
     case aura::kCursorProgress:
     case aura::kCursorNoDrop:
     case aura::kCursorCopy:
     case aura::kCursorNone:
     case aura::kCursorNotAllowed:
     case aura::kCursorZoomIn:
     case aura::kCursorZoomOut:
     case aura::kCursorGrab:
     case aura::kCursorGrabbing:
+      // TODO(jamescook): Need cursors for these.  crbug.com/111650
+      return XC_left_ptr;
     case aura::kCursorCustom:
-      // TODO(jamescook): Need cursors for these.  crbug.com/111650
+      NOTREACHED();

[sadrul, 2012/02/24 17:38:19]

Too heavy-handed?

[Daniel Erat, 2012/02/24 18:05:47]

No, this seems reasonable to me.

       return XC_left_ptr;
   }
   NOTREACHED();
   return XC_left_ptr;
 }
 
 // Coalesce all pending motion events that are at the top of the queue, and
 // return the number eliminated, storing the last one in |last_event|.
 int CoalescePendingXIMotionEvents(const XEvent* xev, XEvent* last_event) {
   XIDeviceEvent* xievent = static_cast<XIDeviceEvent*>(xev->xcookie.data);
@@ skipping 376 matching lines @@
   current_cursor_ = cursor;
 
   // Custom web cursors are handled directly.
   if (cursor == kCursorCustom)
     return;
 
   if (cursor_shown_)
     SetCursorInternal(cursor);
 }
 
+void RootWindowHostLinux::SetCustomCursor(const gfx::PlatformCursor& cursor) {
+  if (cursor_shown_)
+    XDefineCursor(xdisplay_, xwindow_, cursor);
+}
+
 void RootWindowHostLinux::ShowCursor(bool show) {
   if (show == cursor_shown_)
     return;
   cursor_shown_ = show;
   SetCursorInternal(show ? current_cursor_ : kCursorNone);
 }
 
 gfx::Point RootWindowHostLinux::QueryMouseLocation() {
   ::Window root_return, child_return;
   int root_x_return, root_y_return, win_x_return, win_y_return;
@@ skipping 91 matching lines @@
   return new RootWindowHostLinux(bounds);
 }
 
 // static
 gfx::Size RootWindowHost::GetNativeScreenSize() {
   ::Display* xdisplay = base::MessagePumpX::GetDefaultXDisplay();
   return gfx::Size(DisplayWidth(xdisplay, 0), DisplayHeight(xdisplay, 0));
 }
 
 }  // namespace aura