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// Copyright 2014 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/wm/core/nested_accelerator_dispatcher.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_pump_dispatcher.h"
#include "base/run_loop.h"
#include "ui/base/accelerators/accelerator.h"
#include "ui/events/event.h"
#include "ui/wm/core/accelerator_filter.h"
#include "ui/wm/core/nested_accelerator_delegate.h"
using base::MessagePumpDispatcher;
namespace wm {
namespace {
bool IsKeyEvent(const MSG& msg) {
return msg.message == WM_KEYDOWN || msg.message == WM_SYSKEYDOWN ||
msg.message == WM_KEYUP || msg.message == WM_SYSKEYUP;
}
} // namespace
class NestedAcceleratorDispatcherWin : public NestedAcceleratorDispatcher,
public MessagePumpDispatcher {
public:
NestedAcceleratorDispatcherWin(NestedAcceleratorDelegate* delegate,
MessagePumpDispatcher* nested)
: NestedAcceleratorDispatcher(delegate), nested_dispatcher_(nested) {}
virtual ~NestedAcceleratorDispatcherWin() {}
private:
// NestedAcceleratorDispatcher:
virtual scoped_ptr<base::RunLoop> CreateRunLoop() override {
return make_scoped_ptr(new base::RunLoop(this));
}
// MessagePumpDispatcher:
virtual uint32_t Dispatch(const MSG& event) override {
if (IsKeyEvent(event)) {
ui::KeyEvent key_event(event);
ui::Accelerator accelerator = CreateAcceleratorFromKeyEvent(key_event);
switch (delegate_->ProcessAccelerator(accelerator)) {
case NestedAcceleratorDelegate::RESULT_PROCESS_LATER:
return POST_DISPATCH_QUIT_LOOP;
case NestedAcceleratorDelegate::RESULT_PROCESSED:
return POST_DISPATCH_NONE;
case NestedAcceleratorDelegate::RESULT_NOT_PROCESSED:
break;
}
}
return nested_dispatcher_ ? nested_dispatcher_->Dispatch(event)
: POST_DISPATCH_PERFORM_DEFAULT;
}
MessagePumpDispatcher* nested_dispatcher_;
DISALLOW_COPY_AND_ASSIGN(NestedAcceleratorDispatcherWin);
};
scoped_ptr<NestedAcceleratorDispatcher> NestedAcceleratorDispatcher::Create(
NestedAcceleratorDelegate* delegate,
MessagePumpDispatcher* nested_dispatcher) {
return make_scoped_ptr(
new NestedAcceleratorDispatcherWin(delegate, nested_dispatcher));
}
} // namespace wm
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