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// 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 "ash/accelerators/accelerator_filter.h"
#include "ash/accelerators/accelerator_controller.h"
#include "ash/shell.h"
#include "ash/wm/window_util.h"
#include "ui/aura/root_window.h"
#include "ui/base/accelerators/accelerator.h"
#include "ui/base/accelerators/accelerator_manager.h"
#include "ui/base/events/event.h"
namespace ash {
namespace {
const int kModifierFlagMask = (ui::EF_SHIFT_DOWN |
ui::EF_CONTROL_DOWN |
ui::EF_ALT_DOWN);
// Returns true if the |accelerator| should be processed now, inside Ash's env
// event filter.
bool ShouldProcessAcceleratorsNow(const ui::Accelerator& accelerator,
aura::Window* target) {
if (!target)
return true;
Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
if (std::find(root_windows.begin(), root_windows.end(), target) !=
root_windows.end())
return true;
// A full screen window should be able to handle all key events including the
// reserved ones.
if (wm::IsWindowFullscreen(target)) {
// TODO(yusukes): On Chrome OS, only browser and flash windows can be full
// screen. Launching an app in "open full-screen" mode is not supported yet.
// That makes the IsWindowFullscreen() check above almost meaningless
// because a browser and flash window do handle Ash accelerators anyway
// before they're passed to a page or flash content.
return false;
}
if (Shell::GetInstance()->GetAppListTargetVisibility())
return true;
// Unless |target| is in the full screen state, handle reserved accelerators
// such as Alt+Tab now.
return Shell::GetInstance()->accelerator_controller()->IsReservedAccelerator(
accelerator);
}
} // namespace
namespace internal {
////////////////////////////////////////////////////////////////////////////////
// AcceleratorFilter, public:
AcceleratorFilter::AcceleratorFilter() {
}
AcceleratorFilter::~AcceleratorFilter() {
}
////////////////////////////////////////////////////////////////////////////////
// AcceleratorFilter, EventFilter implementation:
void AcceleratorFilter::OnKeyEvent(ui::KeyEvent* event) {
const ui::EventType type = event->type();
if (type != ui::ET_KEY_PRESSED && type != ui::ET_KEY_RELEASED)
return;
if (event->is_char())
return;
ui::Accelerator accelerator(event->key_code(),
event->flags() & kModifierFlagMask);
accelerator.set_type(type);
// Fill out context object so AcceleratorController will know what
// was the previous accelerator or if the current accelerator is repeated.
Shell::GetInstance()->accelerator_controller()->context()->
UpdateContext(accelerator);
aura::Window* target = static_cast<aura::Window*>(event->target());
if (!ShouldProcessAcceleratorsNow(accelerator, target))
return;
if (Shell::GetInstance()->accelerator_controller()->Process(accelerator))
event->StopPropagation();
}
} // namespace internal
} // namespace ash
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