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refactor: Improve accessibility of menus (#15302)

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* refactor: improve menubar keyboard accessibility

* fix: create a temporary widget for tray icon context menu

* fix: focus menu bar with Alt when autohide is off

* fix: make menu bar focus work more like the native menus

* fix: only focus menu bar if it's not already focused

* fix: track accelerator registration to avoid duplicates

* docs: add docs for & notation in app menu item names

* fix: only try to activate accelerator if it's registered

* fix: add friend to monitor window focus change

* style: add <memory> include
This commit is contained in:
Heilig Benedek 2018-10-29 19:08:47 +01:00 • committed by Charles Kerr
parent 00daff6ac8
commit 894ae1b3f5
13 changed files with 405 additions and 140 deletions
Download patch file Download diff file Expand all files Collapse all files

159
atom/browser/ui/views/menu_bar.cc
View file

@ -5,13 +5,16 @@
#include "atom/browser/ui/views/menu_bar.h"
#include <memory>
#include <set>
#include <sstream>
#include <string>
#include "atom/browser/ui/views/menu_delegate.h"
#include "atom/browser/ui/views/submenu_button.h"
#include "atom/common/keyboard_util.h"
#include "ui/base/models/menu_model.h"
#include "ui/views/background.h"
#include "ui/views/layout/box_layout.h"
#include "ui/views/widget/widget.h"
#if defined(USE_X11)
#include "chrome/browser/ui/libgtkui/gtk_util.h"
@ -32,17 +35,36 @@ const SkColor kDefaultColor = SkColorSetARGB(255, 233, 233, 233);
const char MenuBar::kViewClassName[] = "ElectronMenuBar";
MenuBar::MenuBar(views::View* window)
: background_color_(kDefaultColor), window_(window) {
MenuBarColorUpdater::MenuBarColorUpdater(MenuBar* menu_bar)
: menu_bar_(menu_bar) {}
MenuBarColorUpdater::~MenuBarColorUpdater() {}
void MenuBarColorUpdater::OnDidChangeFocus(views::View* focused_before,
views::View* focused_now) {
if (menu_bar_) {
// if we've changed window focus, update menu bar colors
const auto had_focus = menu_bar_->has_focus_;
menu_bar_->has_focus_ = focused_now != nullptr;
if (menu_bar_->has_focus_ != had_focus)
menu_bar_->UpdateViewColors();
}
}
MenuBar::MenuBar(RootView* window)
: background_color_(kDefaultColor),
window_(window),
color_updater_(new MenuBarColorUpdater(this)) {
RefreshColorCache();
UpdateViewColors();
SetFocusBehavior(FocusBehavior::ALWAYS);
SetLayoutManager(
std::make_unique<views::BoxLayout>(views::BoxLayout::kHorizontal));
window_->GetFocusManager()->AddFocusChangeListener(this);
window_->GetFocusManager()->AddFocusChangeListener(color_updater_.get());
}
MenuBar::~MenuBar() {
window_->GetFocusManager()->RemoveFocusChangeListener(this);
window_->GetFocusManager()->RemoveFocusChangeListener(color_updater_.get());
}
void MenuBar::SetMenu(AtomMenuModel* model) {
@ -96,6 +118,116 @@ bool MenuBar::GetMenuButtonFromScreenPoint(const gfx::Point& screenPoint,
return false;
}
void MenuBar::OnBeforeExecuteCommand() {
RemovePaneFocus();
window_->RestoreFocus();
}
void MenuBar::OnMenuClosed() {
SetAcceleratorVisibility(true);
}
bool MenuBar::AcceleratorPressed(const ui::Accelerator& accelerator) {
views::View* focused_view = GetFocusManager()->GetFocusedView();
if (!ContainsForFocusSearch(this, focused_view))
return false;
switch (accelerator.key_code()) {
case ui::VKEY_MENU:
case ui::VKEY_ESCAPE: {
RemovePaneFocus();
window_->RestoreFocus();
return true;
}
case ui::VKEY_LEFT:
GetFocusManager()->AdvanceFocus(true);
return true;
case ui::VKEY_RIGHT:
GetFocusManager()->AdvanceFocus(false);
return true;
case ui::VKEY_HOME:
GetFocusManager()->SetFocusedViewWithReason(
GetFirstFocusableChild(), views::FocusManager::kReasonFocusTraversal);
return true;
case ui::VKEY_END:
GetFocusManager()->SetFocusedViewWithReason(
GetLastFocusableChild(), views::FocusManager::kReasonFocusTraversal);
return true;
default: {
auto children = GetChildrenInZOrder();
for (int i = 0, n = children.size(); i < n; ++i) {
auto* button = static_cast<SubmenuButton*>(children[i]);
bool shifted = false;
auto keycode =
atom::KeyboardCodeFromCharCode(button->accelerator(), &shifted);
if (keycode == accelerator.key_code()) {
const gfx::Point p(0, 0);
auto event = accelerator.ToKeyEvent();
OnMenuButtonClicked(button, p, &event);
return true;
}
}
return false;
}
}
}
bool MenuBar::SetPaneFocus(views::View* initial_focus) {
bool result = views::AccessiblePaneView::SetPaneFocus(initial_focus);
if (result) {
auto children = GetChildrenInZOrder();
std::set<ui::KeyboardCode> reg;
for (int i = 0, n = children.size(); i < n; ++i) {
auto* button = static_cast<SubmenuButton*>(children[i]);
bool shifted = false;
auto keycode =
atom::KeyboardCodeFromCharCode(button->accelerator(), &shifted);
// We want the menu items to activate if the user presses the accelerator
// key, even without alt, since we are now focused on the menu bar
if (keycode != ui::VKEY_UNKNOWN && reg.find(keycode) != reg.end()) {
reg.insert(keycode);
focus_manager()->RegisterAccelerator(
ui::Accelerator(keycode, ui::EF_NONE),
ui::AcceleratorManager::kNormalPriority, this);
}
}
// We want to remove focus / hide menu bar when alt is pressed again
focus_manager()->RegisterAccelerator(
ui::Accelerator(ui::VKEY_MENU, ui::EF_ALT_DOWN),
ui::AcceleratorManager::kNormalPriority, this);
}
return result;
}
void MenuBar::RemovePaneFocus() {
views::AccessiblePaneView::RemovePaneFocus();
SetAcceleratorVisibility(false);
auto children = GetChildrenInZOrder();
std::set<ui::KeyboardCode> unreg;
for (int i = 0, n = children.size(); i < n; ++i) {
auto* button = static_cast<SubmenuButton*>(children[i]);
bool shifted = false;
auto keycode =
atom::KeyboardCodeFromCharCode(button->accelerator(), &shifted);
if (keycode != ui::VKEY_UNKNOWN && unreg.find(keycode) != unreg.end()) {
unreg.insert(keycode);
focus_manager()->UnregisterAccelerator(
ui::Accelerator(keycode, ui::EF_NONE), this);
}
}
focus_manager()->UnregisterAccelerator(
ui::Accelerator(ui::VKEY_MENU, ui::EF_ALT_DOWN), this);
}
const char* MenuBar::GetClassName() const {
return kViewClassName;
}
@ -119,9 +251,16 @@ void MenuBar::OnMenuButtonClicked(views::MenuButton* source,
return;
}
GetFocusManager()->SetFocusedViewWithReason(
source, views::FocusManager::kReasonFocusTraversal);
// Deleted in MenuDelegate::OnMenuClosed
MenuDelegate* menu_delegate = new MenuDelegate(this);
menu_delegate->RunMenu(menu_model_->GetSubmenuModelAt(id), source);
menu_delegate->RunMenu(menu_model_->GetSubmenuModelAt(id), source,
event != nullptr && event->IsKeyEvent()
? ui::MENU_SOURCE_KEYBOARD
: ui::MENU_SOURCE_MOUSE);
menu_delegate->AddObserver(this);
}
void MenuBar::RefreshColorCache(const ui::NativeTheme* theme) {
@ -151,14 +290,6 @@ void MenuBar::OnNativeThemeChanged(const ui::NativeTheme* theme) {
UpdateViewColors();
}
void MenuBar::OnDidChangeFocus(View* focused_before, View* focused_now) {
// if we've changed focus, update our view
const auto had_focus = has_focus_;
has_focus_ = focused_now != nullptr;
if (has_focus_ != had_focus)
UpdateViewColors();
}
void MenuBar::RebuildChildren() {
RemoveAllChildViews(true);
for (int i = 0, n = GetItemCount(); i < n; ++i) {

44
atom/browser/ui/views/menu_bar.h
View file

@ -5,7 +5,12 @@
#ifndef ATOM_BROWSER_UI_VIEWS_MENU_BAR_H_
#define ATOM_BROWSER_UI_VIEWS_MENU_BAR_H_
#include <memory>
#include "atom/browser/ui/atom_menu_model.h"
#include "atom/browser/ui/views/menu_delegate.h"
#include "atom/browser/ui/views/root_view.h"
#include "ui/views/accessible_pane_view.h"
#include "ui/views/controls/button/menu_button_listener.h"
#include "ui/views/focus/focus_manager.h"
#include "ui/views/view.h"
@ -16,15 +21,27 @@ class MenuButton;
namespace atom {
class MenuDelegate;
class MenuBarColorUpdater : public views::FocusChangeListener {
public:
explicit MenuBarColorUpdater(MenuBar* menu_bar);
~MenuBarColorUpdater() override;
class MenuBar : public views::View,
void OnDidChangeFocus(views::View* focused_before,
views::View* focused_now) override;
void OnWillChangeFocus(views::View* focused_before,
views::View* focused_now) override {}
private:
MenuBar* menu_bar_;
};
class MenuBar : public views::AccessiblePaneView,
public views::MenuButtonListener,
public views::FocusChangeListener {
public atom::MenuDelegate::Observer {
public:
static const char kViewClassName[];
explicit MenuBar(views::View* window);
explicit MenuBar(RootView* window);
~MenuBar() override;
// Replaces current menu with a new one.
@ -47,6 +64,15 @@ class MenuBar : public views::View,
AtomMenuModel** menu_model,
views::MenuButton** button);
// atom::MenuDelegate::Observer:
void OnBeforeExecuteCommand() override;
void OnMenuClosed() override;
// views::AccessiblePaneView:
bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
bool SetPaneFocus(views::View* initial_focus) override;
void RemovePaneFocus() override;
protected:
// views::View:
const char* GetClassName() const override;
@ -57,11 +83,9 @@ class MenuBar : public views::View,
const ui::Event* event) override;
void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
// views::FocusChangeListener:
void OnDidChangeFocus(View* focused_before, View* focused_now) override;
void OnWillChangeFocus(View* focused_before, View* focused_now) override {}
private:
friend class MenuBarColorUpdater;
void RebuildChildren();
void UpdateViewColors();
@ -72,13 +96,15 @@ class MenuBar : public views::View,
SkColor disabled_color_;
#endif
views::View* window_ = nullptr;
RootView* window_ = nullptr;
AtomMenuModel* menu_model_ = nullptr;
View* FindAccelChild(base::char16 key);
bool has_focus_ = true;
std::unique_ptr<MenuBarColorUpdater> color_updater_;
DISALLOW_COPY_AND_ASSIGN(MenuBar);
};

26
atom/browser/ui/views/menu_delegate.cc
View file

@ -14,17 +14,24 @@
namespace atom {
MenuDelegate::MenuDelegate(MenuBar* menu_bar) : menu_bar_(menu_bar), id_(-1) {}
MenuDelegate::MenuDelegate(MenuBar* menu_bar)
: menu_bar_(menu_bar), id_(-1), hold_first_switch_(false) {}
MenuDelegate::~MenuDelegate() {}
void MenuDelegate::RunMenu(AtomMenuModel* model, views::MenuButton* button) {
void MenuDelegate::RunMenu(AtomMenuModel* model,
views::MenuButton* button,
ui::MenuSourceType source_type) {
gfx::Point screen_loc;
views::View::ConvertPointToScreen(button, &screen_loc);
// Subtract 1 from the height to make the popup flush with the button border.
gfx::Rect bounds(screen_loc.x(), screen_loc.y(), button->width(),
button->height() - 1);
if (source_type == ui::MENU_SOURCE_KEYBOARD) {
hold_first_switch_ = true;
}
id_ = button->tag();
adapter_.reset(new MenuModelAdapter(model));
@ -35,15 +42,18 @@ void MenuDelegate::RunMenu(AtomMenuModel* model, views::MenuButton* button) {
item,
views::MenuRunner::CONTEXT_MENU | views::MenuRunner::HAS_MNEMONICS));
menu_runner_->RunMenuAt(button->GetWidget()->GetTopLevelWidget(), button,
bounds, views::MENU_ANCHOR_TOPRIGHT,
ui::MENU_SOURCE_MOUSE);
bounds, views::MENU_ANCHOR_TOPRIGHT, source_type);
}
void MenuDelegate::ExecuteCommand(int id) {
for (Observer& obs : observers_)
obs.OnBeforeExecuteCommand();
adapter_->ExecuteCommand(id);
}
void MenuDelegate::ExecuteCommand(int id, int mouse_event_flags) {
for (Observer& obs : observers_)
obs.OnBeforeExecuteCommand();
adapter_->ExecuteCommand(id, mouse_event_flags);
}
@ -89,6 +99,9 @@ void MenuDelegate::WillHideMenu(views::MenuItemView* menu) {
}
void MenuDelegate::OnMenuClosed(views::MenuItemView* menu) {
for (Observer& obs : observers_)
obs.OnMenuClosed();
// Only switch to new menu when current menu is closed.
if (button_to_open_)
button_to_open_->Activate(nullptr);
@ -101,6 +114,11 @@ views::MenuItemView* MenuDelegate::GetSiblingMenu(
views::MenuAnchorPosition* anchor,
bool* has_mnemonics,
views::MenuButton**) {
if (hold_first_switch_) {
hold_first_switch_ = false;
return nullptr;
}
// TODO(zcbenz): We should follow Chromium's logics on implementing the
// sibling menu switches, this code is almost a hack.
views::MenuButton* button;

18
atom/browser/ui/views/menu_delegate.h
View file

@ -8,6 +8,7 @@
#include <memory>
#include "atom/browser/ui/atom_menu_model.h"
#include "base/observer_list.h"
#include "ui/views/controls/menu/menu_delegate.h"
namespace views {
@ -23,7 +24,19 @@ class MenuDelegate : public views::MenuDelegate {
explicit MenuDelegate(MenuBar* menu_bar);
~MenuDelegate() override;
void RunMenu(AtomMenuModel* model, views::MenuButton* button);
void RunMenu(AtomMenuModel* model,
views::MenuButton* button,
ui::MenuSourceType source_type);
class Observer {
public:
virtual void OnBeforeExecuteCommand() = 0;
virtual void OnMenuClosed() = 0;
};
void AddObserver(Observer* obs) { observers_.AddObserver(obs); }
void RemoveObserver(const Observer* obs) { observers_.RemoveObserver(obs); }
protected:
// views::MenuDelegate:
@ -55,6 +68,9 @@ class MenuDelegate : public views::MenuDelegate {
// The menu button to switch to.
views::MenuButton* button_to_open_ = nullptr;
bool hold_first_switch_;
base::ObserverList<Observer> observers_;
DISALLOW_COPY_AND_ASSIGN(MenuDelegate);
};

39
atom/browser/ui/views/root_view.cc
View file

@ -35,7 +35,9 @@ bool IsAltModifier(const content::NativeWebKeyboardEvent& event) {
} // namespace
RootView::RootView(NativeWindow* window) : window_(window) {
RootView::RootView(NativeWindow* window)
: window_(window),
last_focused_view_tracker_(std::make_unique<views::ViewTracker>()) {
set_owned_by_client();
}
@ -89,10 +91,6 @@ void RootView::SetMenuBarVisibility(bool visible) {
if (!window_->content_view() || !menu_bar_ || menu_bar_visible_ == visible)
return;
// Always show the accelerator when the auto-hide menu bar shows.
if (menu_bar_autohide_)
menu_bar_->SetAcceleratorVisibility(visible);
menu_bar_visible_ = visible;
if (visible) {
DCHECK_EQ(child_count(), 1);
@ -121,15 +119,19 @@ void RootView::HandleKeyEvent(const content::NativeWebKeyboardEvent& event) {
// Show the submenu when "Alt+Key" is pressed.
if (event.GetType() == blink::WebInputEvent::kRawKeyDown &&
!IsAltKey(event) && IsAltModifier(event)) {
if (!menu_bar_visible_ &&
(menu_bar_->HasAccelerator(event.windows_key_code)))
if (menu_bar_->HasAccelerator(event.windows_key_code)) {
if (!menu_bar_visible_) {
SetMenuBarVisibility(true);
menu_bar_->ActivateAccelerator(event.windows_key_code);
return;
View* focused_view = GetFocusManager()->GetFocusedView();
last_focused_view_tracker_->SetView(focused_view);
menu_bar_->RequestFocus();
}
if (!menu_bar_autohide_)
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)) {
@ -139,13 +141,30 @@ void RootView::HandleKeyEvent(const content::NativeWebKeyboardEvent& event) {
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;
}

4
atom/browser/ui/views/root_view.h
View file

@ -9,6 +9,7 @@
#include "atom/browser/ui/accelerator_util.h"
#include "ui/views/view.h"
#include "ui/views/view_tracker.h"
namespace content {
struct NativeWebKeyboardEvent;
@ -34,6 +35,7 @@ class RootView : public views::View {
bool IsMenuBarVisible() const;
void HandleKeyEvent(const content::NativeWebKeyboardEvent& event);
void ResetAltState();
void RestoreFocus();
// views::View:
void Layout() override;
@ -57,6 +59,8 @@ class RootView : public views::View {
// Map from accelerator to menu item's command id.
accelerator_util::AcceleratorTable accelerator_table_;
std::unique_ptr<views::ViewTracker> last_focused_view_tracker_;
DISALLOW_COPY_AND_ASSIGN(RootView);
};

14
atom/browser/ui/views/submenu_button.cc
View file

@ -71,14 +71,20 @@ void SubmenuButton::SetUnderlineColor(SkColor color) {
underline_color_ = color;
}
void SubmenuButton::GetAccessibleNodeData(ui::AXNodeData* node_data) {
node_data->SetName(accessible_name());
node_data->role = ax::mojom::Role::kPopUpButton;
}
void SubmenuButton::PaintButtonContents(gfx::Canvas* canvas) {
views::MenuButton::PaintButtonContents(canvas);
if (show_underline_ && (underline_start_ != underline_end_)) {
int padding = (width() - text_width_) / 2;
int underline_height = (height() + text_height_) / 2 - 2;
canvas->DrawLine(gfx::Point(underline_start_ + padding, underline_height),
gfx::Point(underline_end_ + padding, underline_height),
float padding = (width() - text_width_) / 2;
float underline_height = (height() + text_height_) / 2 - 2;
canvas->DrawSharpLine(
gfx::PointF(underline_start_ + padding, underline_height),
gfx::PointF(underline_end_ + padding, underline_height),
underline_color_);
}
}

3
atom/browser/ui/views/submenu_button.h
View file

@ -7,6 +7,7 @@
#include <memory>
#include "ui/accessibility/ax_node_data.h"
#include "ui/views/animation/ink_drop_highlight.h"
#include "ui/views/controls/button/menu_button.h"
@ -25,6 +26,8 @@ class SubmenuButton : public views::MenuButton {
base::char16 accelerator() const { return accelerator_; }
void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
// views::MenuButton:
void PaintButtonContents(gfx::Canvas* canvas) override;

30
atom/browser/ui/win/notify_icon.cc
View file

@ -15,11 +15,16 @@
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/image/image.h"
#include "ui/views/controls/menu/menu_runner.h"
#include "ui/views/widget/widget.h"
namespace atom {
NotifyIcon::NotifyIcon(NotifyIconHost* host, UINT id, HWND window, UINT message)
: host_(host), icon_id_(id), window_(window), message_id_(message) {
: host_(host),
icon_id_(id),
window_(window),
message_id_(message),
weak_factory_(this) {
NOTIFYICONDATA icon_data;
InitIconData(&icon_data);
icon_data.uFlags |= NIF_MESSAGE;
@ -142,10 +147,25 @@ void NotifyIcon::PopUpContextMenu(const gfx::Point& pos,
if (pos.IsOrigin())
rect.set_origin(display::Screen::GetScreen()->GetCursorScreenPoint());
// Create a widget for the menu, otherwise we get no keyboard events, which
// is required for accessibility.
widget_.reset(new views::Widget());
views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
params.ownership =
views::Widget::InitParams::Ownership::WIDGET_OWNS_NATIVE_WIDGET;
params.bounds = gfx::Rect(0, 0, 0, 0);
params.force_software_compositing = true;
widget_->Init(params);
widget_->Show();
widget_->Activate();
menu_runner_.reset(new views::MenuRunner(
menu_model != nullptr ? menu_model : menu_model_,
views::MenuRunner::CONTEXT_MENU | views::MenuRunner::HAS_MNEMONICS));
menu_runner_->RunMenuAt(NULL, NULL, rect, views::MENU_ANCHOR_TOPLEFT,
views::MenuRunner::CONTEXT_MENU | views::MenuRunner::HAS_MNEMONICS,
base::Bind(&NotifyIcon::OnContextMenuClosed,
weak_factory_.GetWeakPtr())));
menu_runner_->RunMenuAt(widget_.get(), NULL, rect, views::MENU_ANCHOR_TOPLEFT,
ui::MENU_SOURCE_MOUSE);
}
@ -172,4 +192,8 @@ void NotifyIcon::InitIconData(NOTIFYICONDATA* icon_data) {
icon_data->uID = icon_id_;
}
void NotifyIcon::OnContextMenuClosed() {
widget_->Close();
}
} // namespace atom

11
atom/browser/ui/win/notify_icon.h
View file

@ -15,6 +15,7 @@
#include "atom/browser/ui/tray_icon.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/win/scoped_gdi_object.h"
namespace gfx {
@ -23,7 +24,8 @@ class Point;
namespace views {
class MenuRunner;
}
class Widget;
} // namespace views
namespace atom {
@ -63,6 +65,7 @@ class NotifyIcon : public TrayIcon {
private:
void InitIconData(NOTIFYICONDATA* icon_data);
void OnContextMenuClosed();
// The tray that owns us. Weak.
NotifyIconHost* host_;
@ -85,6 +88,12 @@ class NotifyIcon : public TrayIcon {
// Context menu associated with this icon (if any).
std::unique_ptr<views::MenuRunner> menu_runner_;
// Temporary widget for the context menu, needed for keyboard event capture.
std::unique_ptr<views::Widget> widget_;
// WeakPtrFactory for CloseClosure safety.
base::WeakPtrFactory<NotifyIcon> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(NotifyIcon);
};

178
atom/common/keyboard_util.cc
View file

@ -14,8 +14,94 @@ namespace atom {
namespace {
// Return key code of the char, and also determine whether the SHIFT key is
// pressed.
// Return key code represented by |str|.
ui::KeyboardCode KeyboardCodeFromKeyIdentifier(const std::string& s,
bool* shifted) {
std::string str = base::ToLowerASCII(s);
if (str == "ctrl" || str == "control") {
return ui::VKEY_CONTROL;
} else if (str == "super" || str == "cmd" || str == "command" ||
str == "meta") {
return ui::VKEY_COMMAND;
} else if (str == "commandorcontrol" || str == "cmdorctrl") {
#if defined(OS_MACOSX)
return ui::VKEY_COMMAND;
#else
return ui::VKEY_CONTROL;
#endif
} else if (str == "alt" || str == "option") {
return ui::VKEY_MENU;
} else if (str == "shift") {
return ui::VKEY_SHIFT;
} else if (str == "altgr") {
return ui::VKEY_ALTGR;
} else if (str == "plus") {
*shifted = true;
return ui::VKEY_OEM_PLUS;
} else if (str == "tab") {
return ui::VKEY_TAB;
} else if (str == "space") {
return ui::VKEY_SPACE;
} else if (str == "backspace") {
return ui::VKEY_BACK;
} else if (str == "delete") {
return ui::VKEY_DELETE;
} else if (str == "insert") {
return ui::VKEY_INSERT;
} else if (str == "enter" || str == "return") {
return ui::VKEY_RETURN;
} else if (str == "up") {
return ui::VKEY_UP;
} else if (str == "down") {
return ui::VKEY_DOWN;
} else if (str == "left") {
return ui::VKEY_LEFT;
} else if (str == "right") {
return ui::VKEY_RIGHT;
} else if (str == "home") {
return ui::VKEY_HOME;
} else if (str == "end") {
return ui::VKEY_END;
} else if (str == "pageup") {
return ui::VKEY_PRIOR;
} else if (str == "pagedown") {
return ui::VKEY_NEXT;
} else if (str == "esc" || str == "escape") {
return ui::VKEY_ESCAPE;
} else if (str == "volumemute") {
return ui::VKEY_VOLUME_MUTE;
} else if (str == "volumeup") {
return ui::VKEY_VOLUME_UP;
} else if (str == "volumedown") {
return ui::VKEY_VOLUME_DOWN;
} else if (str == "medianexttrack") {
return ui::VKEY_MEDIA_NEXT_TRACK;
} else if (str == "mediaprevioustrack") {
return ui::VKEY_MEDIA_PREV_TRACK;
} else if (str == "mediastop") {
return ui::VKEY_MEDIA_STOP;
} else if (str == "mediaplaypause") {
return ui::VKEY_MEDIA_PLAY_PAUSE;
} else if (str == "printscreen") {
return ui::VKEY_SNAPSHOT;
} else if (str.size() > 1 && str[0] == 'f') {
// F1 - F24.
int n;
if (base::StringToInt(str.c_str() + 1, &n) && n > 0 && n < 25) {
return static_cast<ui::KeyboardCode>(ui::VKEY_F1 + n - 1);
} else {
LOG(WARNING) << str << "is not available on keyboard";
return ui::VKEY_UNKNOWN;
}
} else {
if (str.size() > 2)
LOG(WARNING) << "Invalid accelerator token: " << str;
return ui::VKEY_UNKNOWN;
}
}
} // namespace
ui::KeyboardCode KeyboardCodeFromCharCode(base::char16 c, bool* shifted) {
c = base::ToLowerASCII(c);
*shifted = false;
@ -198,94 +284,6 @@ ui::KeyboardCode KeyboardCodeFromCharCode(base::char16 c, bool* shifted) {
}
}
// Return key code represented by |str|.
ui::KeyboardCode KeyboardCodeFromKeyIdentifier(const std::string& s,
bool* shifted) {
std::string str = base::ToLowerASCII(s);
if (str == "ctrl" || str == "control") {
return ui::VKEY_CONTROL;
} else if (str == "super" || str == "cmd" || str == "command" ||
str == "meta") {
return ui::VKEY_COMMAND;
} else if (str == "commandorcontrol" || str == "cmdorctrl") {
#if defined(OS_MACOSX)
return ui::VKEY_COMMAND;
#else
return ui::VKEY_CONTROL;
#endif
} else if (str == "alt" || str == "option") {
return ui::VKEY_MENU;
} else if (str == "shift") {
return ui::VKEY_SHIFT;
} else if (str == "altgr") {
return ui::VKEY_ALTGR;
} else if (str == "plus") {
*shifted = true;
return ui::VKEY_OEM_PLUS;
} else if (str == "tab") {
return ui::VKEY_TAB;
} else if (str == "space") {
return ui::VKEY_SPACE;
} else if (str == "backspace") {
return ui::VKEY_BACK;
} else if (str == "delete") {
return ui::VKEY_DELETE;
} else if (str == "insert") {
return ui::VKEY_INSERT;
} else if (str == "enter" || str == "return") {
return ui::VKEY_RETURN;
} else if (str == "up") {
return ui::VKEY_UP;
} else if (str == "down") {
return ui::VKEY_DOWN;
} else if (str == "left") {
return ui::VKEY_LEFT;
} else if (str == "right") {
return ui::VKEY_RIGHT;
} else if (str == "home") {
return ui::VKEY_HOME;
} else if (str == "end") {
return ui::VKEY_END;
} else if (str == "pageup") {
return ui::VKEY_PRIOR;
} else if (str == "pagedown") {
return ui::VKEY_NEXT;
} else if (str == "esc" || str == "escape") {
return ui::VKEY_ESCAPE;
} else if (str == "volumemute") {
return ui::VKEY_VOLUME_MUTE;
} else if (str == "volumeup") {
return ui::VKEY_VOLUME_UP;
} else if (str == "volumedown") {
return ui::VKEY_VOLUME_DOWN;
} else if (str == "medianexttrack") {
return ui::VKEY_MEDIA_NEXT_TRACK;
} else if (str == "mediaprevioustrack") {
return ui::VKEY_MEDIA_PREV_TRACK;
} else if (str == "mediastop") {
return ui::VKEY_MEDIA_STOP;
} else if (str == "mediaplaypause") {
return ui::VKEY_MEDIA_PLAY_PAUSE;
} else if (str == "printscreen") {
return ui::VKEY_SNAPSHOT;
} else if (str.size() > 1 && str[0] == 'f') {
// F1 - F24.
int n;
if (base::StringToInt(str.c_str() + 1, &n) && n > 0 && n < 25) {
return static_cast<ui::KeyboardCode>(ui::VKEY_F1 + n - 1);
} else {
LOG(WARNING) << str << "is not available on keyboard";
return ui::VKEY_UNKNOWN;
}
} else {
if (str.size() > 2)
LOG(WARNING) << "Invalid accelerator token: " << str;
return ui::VKEY_UNKNOWN;
}
}
} // namespace
ui::KeyboardCode KeyboardCodeFromStr(const std::string& str, bool* shifted) {
if (str.size() == 1)
return KeyboardCodeFromCharCode(str[0], shifted);

5
atom/common/keyboard_util.h
View file

@ -7,10 +7,15 @@
#include <string>
#include "base/strings/string16.h"
#include "ui/events/keycodes/keyboard_codes.h"
namespace atom {
// Return key code of the char, and also determine whether the SHIFT key is
// pressed.
ui::KeyboardCode KeyboardCodeFromCharCode(base::char16 c, bool* shifted);
// Return key code of the |str|, and also determine whether the SHIFT key is
// pressed.
ui::KeyboardCode KeyboardCodeFromStr(const std::string& str, bool* shifted);

6
docs/api/menu.md
View file

@ -19,6 +19,12 @@ The `menu` class has the following static methods:
Sets `menu` as the application menu on macOS. On Windows and Linux, the
`menu` will be set as each window's top menu.
Also on Windows and Linux, you can use a `&` in the top-level item name to
indicate which letter should get a generated accelerator. For example, using
`&File` for the file menu would result in a generated `Alt-F` accelerator that
opens the associated menu. The indicated character in the button label gets an
underline. The `&` character is not displayed on the button label.
Passing `null` will remove the menu bar on Windows and Linux but has no
effect on macOS.