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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/run_loop.h"
#include "ui/base/accelerators/accelerator.h"
#include "ui/events/event.h"
#include "ui/events/platform/platform_event_dispatcher.h"
#include "ui/events/platform/platform_event_source.h"
#include "ui/events/platform/scoped_event_dispatcher.h"
#include "ui/wm/core/accelerator_filter.h"
#include "ui/wm/core/nested_accelerator_delegate.h"
#if defined(USE_X11)
#include <X11/Xlib.h>
#endif
namespace wm {
namespace {
#if defined(USE_OZONE)
bool IsKeyEvent(const base::NativeEvent& native_event) {
const ui::KeyEvent* event = static_cast<const ui::KeyEvent*>(native_event);
return event->IsKeyEvent();
}
#elif defined(USE_X11)
bool IsKeyEvent(const XEvent* xev) {
return xev->type == KeyPress || xev->type == KeyRelease;
}
#else
#error Unknown build platform: you should have either use_ozone or use_x11.
#endif
scoped_ptr<ui::ScopedEventDispatcher> OverrideDispatcher(
ui::PlatformEventDispatcher* dispatcher) {
ui::PlatformEventSource* source = ui::PlatformEventSource::GetInstance();
return source ? source->OverrideDispatcher(dispatcher)
: scoped_ptr<ui::ScopedEventDispatcher>();
}
} // namespace
class NestedAcceleratorDispatcherLinux : public NestedAcceleratorDispatcher,
public ui::PlatformEventDispatcher {
public:
explicit NestedAcceleratorDispatcherLinux(NestedAcceleratorDelegate* delegate)
: NestedAcceleratorDispatcher(delegate),
restore_dispatcher_(OverrideDispatcher(this)) {}
~NestedAcceleratorDispatcherLinux() override {}
private:
// AcceleratorDispatcher:
scoped_ptr<base::RunLoop> CreateRunLoop() override {
return make_scoped_ptr(new base::RunLoop());
}
// ui::PlatformEventDispatcher:
bool CanDispatchEvent(const ui::PlatformEvent& event) override {
return true;
}
uint32_t DispatchEvent(const ui::PlatformEvent& 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:
#if defined(USE_X11)
XPutBackEvent(event->xany.display, event);
#else
NOTIMPLEMENTED();
#endif
return ui::POST_DISPATCH_NONE;
case NestedAcceleratorDelegate::RESULT_PROCESSED:
return ui::POST_DISPATCH_NONE;
case NestedAcceleratorDelegate::RESULT_NOT_PROCESSED:
break;
}
}
ui::PlatformEventDispatcher* prev = *restore_dispatcher_;
uint32_t perform_default = ui::POST_DISPATCH_PERFORM_DEFAULT;
return prev ? prev->DispatchEvent(event) : perform_default;
}
scoped_ptr<ui::ScopedEventDispatcher> restore_dispatcher_;
DISALLOW_COPY_AND_ASSIGN(NestedAcceleratorDispatcherLinux);
};
scoped_ptr<NestedAcceleratorDispatcher> NestedAcceleratorDispatcher::Create(
NestedAcceleratorDelegate* delegate,
base::MessagePumpDispatcher* nested_dispatcher) {
return make_scoped_ptr(new NestedAcceleratorDispatcherLinux(delegate));
}
} // namespace wm
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