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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 "ash/accelerators/accelerator_delegate.h"
#include "ash/accelerators/accelerator_controller.h"
#include "ash/shell.h"
#include "ash/wm/window_state.h"
#include "ui/base/accelerators/accelerator.h"
#include "ui/events/event.h"
#include "ui/wm/core/window_util.h"
namespace ash {
namespace {} // namespace
AcceleratorDelegate::AcceleratorDelegate() {
}
AcceleratorDelegate::~AcceleratorDelegate() {
}
bool AcceleratorDelegate::ProcessAccelerator(const ui::KeyEvent& key_event,
const ui::Accelerator& accelerator,
KeyType key_type) {
// Special hardware keys like brightness and volume are handled in
// special way. However, some windows can override this behavior
// (e.g. Chrome v1 apps by default and Chrome v2 apps with
// permission) by setting a window property.
if (key_type == KEY_TYPE_SYSTEM && !CanConsumeSystemKeys(key_event)) {
// System keys are always consumed regardless of whether they trigger an
// accelerator to prevent windows from seeing unexpected key up events.
Shell::GetInstance()->accelerator_controller()->Process(accelerator);
return true;
}
if (!ShouldProcessAcceleratorNow(key_event, accelerator))
return false;
return Shell::GetInstance()->accelerator_controller()->Process(accelerator);
}
// Uses the top level window so if the target is a web contents window the
// containing parent window will be checked for the property.
bool AcceleratorDelegate::CanConsumeSystemKeys(const ui::KeyEvent& event) {
aura::Window* target = static_cast<aura::Window*>(event.target());
DCHECK(target);
aura::Window* top_level = ::wm::GetToplevelWindow(target);
return top_level && wm::GetWindowState(top_level)->can_consume_system_keys();
}
// Returns true if the |accelerator| should be processed now, inside Ash's env
// event filter.
bool AcceleratorDelegate::ShouldProcessAcceleratorNow(
const ui::KeyEvent& event,
const ui::Accelerator& accelerator) {
aura::Window* target = static_cast<aura::Window*>(event.target());
DCHECK(target);
aura::Window::Windows root_windows = Shell::GetAllRootWindows();
if (std::find(root_windows.begin(), root_windows.end(), target) !=
root_windows.end())
return true;
aura::Window* top_level = ::wm::GetToplevelWindow(target);
Shell* shell = Shell::GetInstance();
// Reserved accelerators (such as Power button) always have a prority.
if (shell->accelerator_controller()->IsReserved(accelerator))
return true;
// A full screen window has a right to handle all key events including the
// reserved ones.
if (top_level && wm::GetWindowState(top_level)->IsFullscreen()) {
// On ChromeOS, fullscreen windows are either browser or apps, which
// send key events to a web content first, then will process keys
// if the web content didn't consume them.
return false;
}
// Handle preferred accelerators (such as ALT-TAB) before sending
// to the target.
if (shell->accelerator_controller()->IsPreferred(accelerator))
return true;
return shell->GetAppListTargetVisibility();
}
} // namespace ash
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