cef/patch/patches/message_loop.patch
2019-11-19 13:22:13 -05:00

79 lines
3.1 KiB
Diff

diff --git base/message_loop/message_loop_current.cc base/message_loop/message_loop_current.cc
index 7688ba3d7b0d..9acaaa0d5c7f 100644
--- base/message_loop/message_loop_current.cc
+++ base/message_loop/message_loop_current.cc
@@ -47,6 +47,8 @@ void MessageLoopCurrent::AddDestructionObserver(
void MessageLoopCurrent::RemoveDestructionObserver(
DestructionObserver* destruction_observer) {
+ if (!current_)
+ return;
DCHECK(current_->IsBoundToCurrentThread());
current_->RemoveDestructionObserver(destruction_observer);
}
diff --git base/message_loop/message_loop_current.h base/message_loop/message_loop_current.h
index a3b48b58d367..57f8dc7fe2fa 100644
--- base/message_loop/message_loop_current.h
+++ base/message_loop/message_loop_current.h
@@ -120,6 +120,12 @@ class BASE_EXPORT MessageLoopCurrent {
// posted tasks.
void SetAddQueueTimeToTasks(bool enable);
+#if defined(OS_WIN)
+ void set_os_modal_loop(bool os_modal_loop) { os_modal_loop_ = os_modal_loop; }
+
+ bool os_modal_loop() const { return os_modal_loop_; }
+#endif // OS_WIN
+
// Enables or disables the recursive task processing. This happens in the case
// of recursive message loops. Some unwanted message loops may occur when
// using common controls or printer functions. By default, recursive task
@@ -190,6 +196,13 @@ class BASE_EXPORT MessageLoopCurrent {
friend class web::WebTaskEnvironment;
sequence_manager::internal::SequenceManagerImpl* current_;
+
+#if defined(OS_WIN)
+ private:
+ // Should be set to true before calling Windows APIs like TrackPopupMenu, etc.
+ // which enter a modal message loop.
+ bool os_modal_loop_ = false;
+#endif
};
#if !defined(OS_NACL)
diff --git base/message_loop/message_pump_win.cc base/message_loop/message_pump_win.cc
index 3e9562cc4cc5..cf4a700364d3 100644
--- base/message_loop/message_pump_win.cc
+++ base/message_loop/message_pump_win.cc
@@ -2,6 +2,7 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
+#include "base/message_loop/message_loop_current.h"
#include "base/message_loop/message_pump_win.h"
#include <algorithm>
@@ -493,10 +494,18 @@ bool MessagePumpForUI::ProcessPumpReplacementMessage() {
// asynchronous to this thread!!
MSG msg;
- const bool have_message =
- ::PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE) != FALSE;
+ bool have_message = false;
+ // We should not process all window messages if we are in the context of an
+ // OS modal loop, i.e. in the context of a windows API call like MessageBox.
+ // This is to ensure that these messages are peeked out by the OS modal loop.
+ if (MessageLoopCurrent::Get()->os_modal_loop()) {
+ // We only peek out WM_PAINT and WM_TIMER here for reasons mentioned above.
+ have_message = PeekMessage(&msg, NULL, WM_PAINT, WM_PAINT, PM_REMOVE) ||
+ PeekMessage(&msg, NULL, WM_TIMER, WM_TIMER, PM_REMOVE);
+ } else {
+ have_message = PeekMessage(&msg, NULL, 0, 0, PM_REMOVE) != FALSE;
+ }
- // Expect no message or a message different than kMsgHaveWork.
DCHECK(!have_message || kMsgHaveWork != msg.message ||
msg.hwnd != message_window_.hwnd());