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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/controls/menu/menu_pre_target_handler_aura.h"
#include <memory>
#include "ui/aura/env.h"
#include "ui/aura/window.h"
#include "ui/views/controls/menu/menu_controller.h"
#include "ui/views/widget/widget.h"
#include "ui/wm/public/activation_client.h"
namespace views {
namespace {
aura::Window* GetOwnerRootWindow(views::Widget* owner) {
return owner ? owner->GetNativeWindow()->GetRootWindow() : nullptr;
}
} // namespace
MenuPreTargetHandlerAura::MenuPreTargetHandlerAura(MenuController* controller,
Widget* owner)
: controller_(controller), root_(GetOwnerRootWindow(owner)) {
if (root_) {
wm::GetActivationClient(root_)->AddObserver(this);
root_->AddObserver(this);
} else {
// This should only happen in cases like when context menus are shown for
// Windows OS system tray items and there is no parent window.
}
aura::Env::GetInstance()->AddPreTargetHandler(
this, ui::EventTarget::Priority::kSystem);
}
MenuPreTargetHandlerAura::~MenuPreTargetHandlerAura() {
aura::Env::GetInstance()->RemovePreTargetHandler(this);
Cleanup();
}
void MenuPreTargetHandlerAura::OnWindowActivated(
wm::ActivationChangeObserver::ActivationReason reason,
aura::Window* gained_active,
aura::Window* lost_active) {
if (!controller_->drag_in_progress()) {
controller_->Cancel(MenuController::ExitType::kAll);
}
}
void MenuPreTargetHandlerAura::OnWindowDestroying(aura::Window* window) {
Cleanup();
}
void MenuPreTargetHandlerAura::OnCancelMode(ui::CancelModeEvent* event) {
controller_->Cancel(MenuController::ExitType::kAll);
}
void MenuPreTargetHandlerAura::OnKeyEvent(ui::KeyEvent* event) {
// Fully exit the menu, if the key event is supposed to perform some task.
if (ShouldCancelMenuForEvent(*event)) {
controller_->Cancel(MenuController::ExitType::kAll);
return;
}
controller_->OnWillDispatchKeyEvent(event);
}
bool MenuPreTargetHandlerAura::ShouldCancelMenuForEvent(
const ui::KeyEvent& event) {
const ui::KeyboardCode key_code = event.key_code();
switch (key_code) {
case ui::VKEY_ESCAPE:
// Fully exit the menu when Shift-Esc is pressed because it is
// supposed to open the Task Manager on Windows and Linux
if (event.IsShiftDown()) {
return true;
}
break;
case ui::VKEY_J:
// Fully exit the menu when Ctrl+J is pressed because it is supposed
// to open the downloads page on Windows and Linux.
if (event.IsControlDown()) {
return true;
}
break;
case ui::VKEY_H:
case ui::VKEY_R:
case ui::VKEY_N:
case ui::VKEY_T:
case ui::VKEY_P:
case ui::VKEY_S:
// Fully exit the menu when:
// Ctrl+H is pressed because it is supposed to open the history page.
// Ctrl+R is pressed because it is supposed to reload the current page.
// Ctrl+N/Ctrl+Shift+N is pressed because it is supposed to open the
// new window/new incognito window.
// Ctrl+T is pressed because it is supposed to open the new tab.
// Ctrl+P is pressed because it is supposed to print the current page.
// Ctrl+S is pressed because it is supposed to save the current web page.
if (event.IsControlDown()) {
return true;
}
break;
default:
break;
}
return false;
}
void MenuPreTargetHandlerAura::Cleanup() {
if (!root_) {
return;
}
// The ActivationClient may have been destroyed by the time we get here.
wm::ActivationClient* client = wm::GetActivationClient(root_);
if (client) {
client->RemoveObserver(this);
}
root_->RemoveObserver(this);
root_ = nullptr;
}
// static
std::unique_ptr<MenuPreTargetHandler> MenuPreTargetHandler::Create(
MenuController* controller,
Widget* owner) {
return std::make_unique<MenuPreTargetHandlerAura>(controller, owner);
}
} // namespace views
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