Allows menu host windows to be enumerated in DragTargetWindowFinder

ui/base/x/x11_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.
 
 // This file defines utility functions for X11 (Linux only). This code has been
 // ported from XCB since we can't use XCB on Ubuntu while its 32-bit support
 // remains woefully incomplete.
 
 #include "ui/base/x/x11_util.h"
 
@@ skipping 17 matching lines @@
 #include "base/memory/singleton.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_byteorder.h"
 #include "base/threading/thread.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkPostConfig.h"
+#include "ui/base/x/x11_menu_list.h"
 #include "ui/base/x/x11_util_internal.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/keycodes/keyboard_code_conversion_x.h"
 #include "ui/events/x/device_data_manager.h"
 #include "ui/events/x/touch_factory_x11.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/image/image_skia_rep.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/point_conversions.h"
@@ skipping 1028 matching lines @@
 
   XFree(prop.value);
   return true;
 }
 
 bool EnumerateChildren(EnumerateWindowsDelegate* delegate, XID window,
                        const int max_depth, int depth) {
   if (depth > max_depth)
     return false;
 
+  std::vector<XID> windows;
+  std::vector<XID>::iterator iter;
+  if (depth == 0) {
+    XMenuList::GetInstance()->InsertMenuWindowXIDs(&windows);
+    // Enumerate the menus first.
+    for (iter = windows.begin(); iter != windows.end(); iter++) {
+      if (delegate->ShouldStopIterating(*iter))
+        return true;
+    }
+    windows.clear();
+  }
+
   XID root, parent, *children;
   unsigned int num_children;
   int status = XQueryTree(gfx::GetXDisplay(), window, &root, &parent, &children,
                           &num_children);
   if (status == 0)
     return false;
 
-  std::vector<XID> windows;
   for (int i = static_cast<int>(num_children) - 1; i >= 0; i--)
     windows.push_back(children[i]);
 
   XFree(children);
 
   // XQueryTree returns the children of |window| in bottom-to-top order, so
   // reverse-iterate the list to check the windows from top-to-bottom.
-  std::vector<XID>::iterator iter;
   for (iter = windows.begin(); iter != windows.end(); iter++) {
     if (IsWindowNamed(*iter) && delegate->ShouldStopIterating(*iter))
       return true;
   }
 
   // If we're at this point, we didn't find the window we're looking for at the
   // current level, so we need to recurse to the next level.  We use a second
   // loop because the recursion and call to XQueryTree are expensive and is only
   // needed for a small number of cases.
   if (++depth <= max_depth) {
@@ skipping 15 matching lines @@
   std::vector<XID> stack;
   if (!ui::GetXWindowStack(ui::GetX11RootWindow(), &stack)) {
     // Window Manager doesn't support _NET_CLIENT_LIST_STACKING, so fall back
     // to old school enumeration of all X windows.  Some WMs parent 'top-level'
     // windows in unnamed actual top-level windows (ion WM), so extend the
     // search depth to all children of top-level windows.
     const int kMaxSearchDepth = 1;
     ui::EnumerateAllWindows(delegate, kMaxSearchDepth);
     return;
   }
+  XMenuList::GetInstance()->InsertMenuWindowXIDs(&stack);
 
   std::vector<XID>::iterator iter;
   for (iter = stack.begin(); iter != stack.end(); iter++) {
     if (delegate->ShouldStopIterating(*iter))
       return;
   }
 }
 
 bool GetXWindowStack(Window window, std::vector<XID>* windows) {
   windows->clear();
@@ skipping 458 matching lines @@
       << "request_code " << static_cast<int>(error_event.request_code) << ", "
       << "minor_code " << static_cast<int>(error_event.minor_code)
       << " (" << request_str << ")";
 }
 
 // ----------------------------------------------------------------------------
 // End of x11_util_internal.h
 
 
 }  // namespace ui