/
root_view.cc
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/
root_view.cc
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// Copyright (c) 2018 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "atom/browser/ui/views/root_view.h"
#include "atom/browser/native_window.h"
#include "atom/browser/ui/views/menu_bar.h"
#include "content/public/browser/native_web_keyboard_event.h"
namespace atom {
namespace {
// The menu bar height in pixels.
#if defined(OS_WIN)
const int kMenuBarHeight = 20;
#else
const int kMenuBarHeight = 25;
#endif
bool IsAltKey(const content::NativeWebKeyboardEvent& event) {
return event.windows_key_code == ui::VKEY_MENU;
}
bool IsAltModifier(const content::NativeWebKeyboardEvent& event) {
typedef content::NativeWebKeyboardEvent::Modifiers Modifiers;
int modifiers = event.GetModifiers();
modifiers &= ~Modifiers::kNumLockOn;
modifiers &= ~Modifiers::kCapsLockOn;
return (modifiers == Modifiers::kAltKey) ||
(modifiers == (Modifiers::kAltKey | Modifiers::kIsLeft)) ||
(modifiers == (Modifiers::kAltKey | Modifiers::kIsRight));
}
} // namespace
RootView::RootView(NativeWindow* window)
: window_(window),
last_focused_view_tracker_(std::make_unique<views::ViewTracker>()) {
set_owned_by_client();
}
RootView::~RootView() {}
void RootView::SetMenu(AtomMenuModel* menu_model) {
if (menu_model == nullptr) {
// Remove accelerators
UnregisterAcceleratorsWithFocusManager();
// and menu bar.
SetMenuBarVisibility(false);
menu_bar_.reset();
return;
}
RegisterAcceleratorsWithFocusManager(menu_model);
// Do not show menu bar in frameless window.
if (!window_->has_frame())
return;
if (!menu_bar_) {
menu_bar_.reset(new MenuBar(this));
menu_bar_->set_owned_by_client();
if (!menu_bar_autohide_)
SetMenuBarVisibility(true);
}
menu_bar_->SetMenu(menu_model);
Layout();
}
bool RootView::HasMenu() const {
return !!menu_bar_;
}
int RootView::GetMenuBarHeight() const {
return kMenuBarHeight;
}
void RootView::SetAutoHideMenuBar(bool auto_hide) {
menu_bar_autohide_ = auto_hide;
}
bool RootView::IsMenuBarAutoHide() const {
return menu_bar_autohide_;
}
void RootView::SetMenuBarVisibility(bool visible) {
if (!window_->content_view() || !menu_bar_ || menu_bar_visible_ == visible)
return;
menu_bar_visible_ = visible;
if (visible) {
DCHECK_EQ(child_count(), 1);
AddChildView(menu_bar_.get());
} else {
DCHECK_EQ(child_count(), 2);
RemoveChildView(menu_bar_.get());
}
Layout();
}
bool RootView::IsMenuBarVisible() const {
return menu_bar_visible_;
}
void RootView::HandleKeyEvent(const content::NativeWebKeyboardEvent& event) {
if (!menu_bar_)
return;
// Show accelerator when "Alt" is pressed.
if (menu_bar_visible_ && IsAltKey(event))
menu_bar_->SetAcceleratorVisibility(event.GetType() ==
blink::WebInputEvent::kRawKeyDown);
// Show the submenu when "Alt+Key" is pressed.
if (event.GetType() == blink::WebInputEvent::kRawKeyDown &&
!IsAltKey(event) && IsAltModifier(event)) {
if (menu_bar_->HasAccelerator(event.windows_key_code)) {
if (!menu_bar_visible_) {
SetMenuBarVisibility(true);
View* focused_view = GetFocusManager()->GetFocusedView();
last_focused_view_tracker_->SetView(focused_view);
menu_bar_->RequestFocus();
}
menu_bar_->ActivateAccelerator(event.windows_key_code);
}
return;
}
// Toggle the menu bar only when a single Alt is released.
if (event.GetType() == blink::WebInputEvent::kRawKeyDown && IsAltKey(event)) {
// When a single Alt is pressed:
menu_bar_alt_pressed_ = true;
} else if (event.GetType() == blink::WebInputEvent::kKeyUp &&
IsAltKey(event) && menu_bar_alt_pressed_) {
// When a single Alt is released right after a Alt is pressed:
menu_bar_alt_pressed_ = false;
if (menu_bar_autohide_)
SetMenuBarVisibility(!menu_bar_visible_);
View* focused_view = GetFocusManager()->GetFocusedView();
last_focused_view_tracker_->SetView(focused_view);
menu_bar_->RequestFocus();
// Show accelerators when menu bar is focused
menu_bar_->SetAcceleratorVisibility(true);
} else {
// When any other keys except single Alt have been pressed/released:
menu_bar_alt_pressed_ = false;
}
}
void RootView::RestoreFocus() {
View* last_focused_view = last_focused_view_tracker_->view();
if (last_focused_view) {
GetFocusManager()->SetFocusedViewWithReason(
last_focused_view, views::FocusManager::kReasonFocusRestore);
}
if (menu_bar_autohide_)
SetMenuBarVisibility(false);
}
void RootView::ResetAltState() {
menu_bar_alt_pressed_ = false;
}
void RootView::Layout() {
if (!window_->content_view()) // Not ready yet.
return;
const auto menu_bar_bounds =
menu_bar_visible_ ? gfx::Rect(0, 0, size().width(), kMenuBarHeight)
: gfx::Rect();
if (menu_bar_)
menu_bar_->SetBoundsRect(menu_bar_bounds);
window_->content_view()->SetBoundsRect(
gfx::Rect(0, menu_bar_bounds.height(), size().width(),
size().height() - menu_bar_bounds.height()));
}
gfx::Size RootView::GetMinimumSize() const {
return window_->GetMinimumSize();
}
gfx::Size RootView::GetMaximumSize() const {
return window_->GetMaximumSize();
}
bool RootView::AcceleratorPressed(const ui::Accelerator& accelerator) {
return accelerator_util::TriggerAcceleratorTableCommand(&accelerator_table_,
accelerator);
}
void RootView::RegisterAcceleratorsWithFocusManager(AtomMenuModel* menu_model) {
if (!menu_model)
return;
// Clear previous accelerators.
UnregisterAcceleratorsWithFocusManager();
views::FocusManager* focus_manager = GetFocusManager();
// Register accelerators with focus manager.
accelerator_util::GenerateAcceleratorTable(&accelerator_table_, menu_model);
for (const auto& iter : accelerator_table_) {
focus_manager->RegisterAccelerator(
iter.first, ui::AcceleratorManager::kNormalPriority, this);
}
}
void RootView::UnregisterAcceleratorsWithFocusManager() {
views::FocusManager* focus_manager = GetFocusManager();
accelerator_table_.clear();
focus_manager->UnregisterAccelerators(this);
}
} // namespace atom