mirror of
https://bitbucket.org/chromiumembedded/cef
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347 lines
9.9 KiB
C++
347 lines
9.9 KiB
C++
// Copyright (c) 2017 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#include "tests/cefclient/browser/views_menu_bar.h"
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#include "include/cef_i18n_util.h"
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#include "include/views/cef_box_layout.h"
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#include "include/views/cef_window.h"
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#include "tests/cefclient/browser/views_style.h"
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namespace client {
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namespace {
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const int kMenuBarGroupId = 100;
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// Convert |c| to lowercase using the current ICU locale.
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// TODO(jshin): What about Turkish locale? See http://crbug.com/81719.
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// If the mnemonic is capital I and the UI language is Turkish, lowercasing it
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// results in 'small dotless i', which is different from a 'dotted i'. Similar
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// issues may exist for az and lt locales.
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char16_t ToLower(char16_t c) {
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CefStringUTF16 str16;
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cef_string_utf16_to_lower(&c, 1, str16.GetWritableStruct());
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return str16.length() > 0 ? str16.c_str()[0] : 0;
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}
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// Extract the mnemonic character from |title|. For example, if |title| is
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// "&Test" then the mnemonic character is 'T'.
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char16_t GetMnemonic(const std::u16string& title) {
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size_t index = 0;
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do {
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index = title.find('&', index);
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if (index != std::u16string::npos) {
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if (index + 1 != title.size() && title[index + 1] != '&') {
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return ToLower(title[index + 1]);
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}
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index++;
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}
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} while (index != std::u16string::npos);
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return 0;
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}
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} // namespace
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ViewsMenuBar::ViewsMenuBar(Delegate* delegate,
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int menu_id_start,
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bool use_bottom_controls)
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: delegate_(delegate),
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id_start_(menu_id_start),
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use_bottom_controls_(use_bottom_controls),
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id_next_(menu_id_start),
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last_nav_with_keyboard_(false) {
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DCHECK(delegate_);
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DCHECK_GT(id_start_, 0);
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}
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bool ViewsMenuBar::HasMenuId(int menu_id) const {
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return menu_id >= id_start_ && menu_id < id_next_;
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}
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CefRefPtr<CefPanel> ViewsMenuBar::GetMenuPanel() {
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EnsureMenuPanel();
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return panel_;
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}
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CefRefPtr<CefMenuModel> ViewsMenuBar::CreateMenuModel(const CefString& label,
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int* menu_id) {
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EnsureMenuPanel();
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// Assign the new menu ID.
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const int new_menu_id = id_next_++;
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if (menu_id) {
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*menu_id = new_menu_id;
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}
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// Create the new MenuModel.
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CefRefPtr<CefMenuModel> model = CefMenuModel::CreateMenuModel(this);
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views_style::ApplyTo(model);
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models_.push_back(model);
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// Create the new MenuButton.
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CefRefPtr<CefMenuButton> button =
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CefMenuButton::CreateMenuButton(this, label);
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button->SetID(new_menu_id);
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views_style::ApplyTo(button.get());
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button->SetInkDropEnabled(true);
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// Assign a group ID to allow focus traversal between MenuButtons using the
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// arrow keys when the menu is not displayed.
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button->SetGroupID(kMenuBarGroupId);
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// Add the new MenuButton to the Planel.
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panel_->AddChildView(button);
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// Extract the mnemonic that triggers the menu, if any.
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char16_t mnemonic = GetMnemonic(label);
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if (mnemonic != 0) {
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mnemonics_.insert(std::make_pair(mnemonic, new_menu_id));
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}
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return model;
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}
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CefRefPtr<CefMenuModel> ViewsMenuBar::GetMenuModel(int menu_id) const {
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if (HasMenuId(menu_id)) {
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return models_[menu_id - id_start_];
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}
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return nullptr;
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}
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void ViewsMenuBar::SetMenuFocusable(bool focusable) {
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if (!panel_) {
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return;
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}
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for (int id = id_start_; id < id_next_; ++id) {
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panel_->GetViewForID(id)->SetFocusable(focusable);
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}
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if (focusable) {
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// Give focus to the first MenuButton.
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panel_->GetViewForID(id_start_)->RequestFocus();
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}
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}
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bool ViewsMenuBar::OnKeyEvent(const CefKeyEvent& event) {
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if (!panel_) {
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return false;
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}
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if (event.type != KEYEVENT_RAWKEYDOWN) {
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return false;
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}
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// Do not check mnemonics if the Alt or Ctrl modifiers are pressed. For
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// example Ctrl+<T> is an accelerator, but <T> only is a mnemonic.
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if (event.modifiers & (EVENTFLAG_ALT_DOWN | EVENTFLAG_CONTROL_DOWN)) {
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return false;
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}
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MnemonicMap::const_iterator it = mnemonics_.find(ToLower(event.character));
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if (it == mnemonics_.end()) {
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return false;
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}
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// Set status indicating that we navigated using the keyboard.
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last_nav_with_keyboard_ = true;
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// Show the selected menu.
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TriggerMenuButton(panel_->GetViewForID(it->second));
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return true;
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}
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void ViewsMenuBar::Reset() {
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panel_ = nullptr;
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models_.clear();
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mnemonics_.clear();
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id_next_ = id_start_;
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}
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void ViewsMenuBar::OnMenuButtonPressed(
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CefRefPtr<CefMenuButton> menu_button,
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const CefPoint& screen_point,
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CefRefPtr<CefMenuButtonPressedLock> button_pressed_lock) {
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CefRefPtr<CefMenuModel> menu_model = GetMenuModel(menu_button->GetID());
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const auto button_bounds = menu_button->GetBoundsInScreen();
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// Adjust menu position to align with the button.
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CefPoint point = screen_point;
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if (CefIsRTL()) {
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point.x += button_bounds.width - 4;
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} else {
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point.x -= button_bounds.width - 4;
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}
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if (use_bottom_controls_) {
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const auto display_bounds =
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menu_button->GetWindow()->GetDisplay()->GetWorkArea();
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const int available_height = display_bounds.y + display_bounds.height -
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button_bounds.y - button_bounds.height;
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// Approximation of the menu height.
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const int menu_height =
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static_cast<int>(menu_model->GetCount()) * button_bounds.height;
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if (menu_height > available_height) {
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// The menu will go upwards, so place it above the button.
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point.y -= button_bounds.height - 8;
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}
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}
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// Keep track of the current |last_nav_with_keyboard_| status and restore it
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// after displaying the new menu.
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bool cur_last_nav_with_keyboard = last_nav_with_keyboard_;
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// May result in the previous menu being closed, in which case MenuClosed will
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// be called before the new menu is displayed.
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menu_button->ShowMenu(menu_model, point, CEF_MENU_ANCHOR_TOPLEFT);
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last_nav_with_keyboard_ = cur_last_nav_with_keyboard;
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}
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void ViewsMenuBar::ExecuteCommand(CefRefPtr<CefMenuModel> menu_model,
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int command_id,
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cef_event_flags_t event_flags) {
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delegate_->MenuBarExecuteCommand(menu_model, command_id, event_flags);
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}
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void ViewsMenuBar::MouseOutsideMenu(CefRefPtr<CefMenuModel> menu_model,
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const CefPoint& screen_point) {
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DCHECK(panel_);
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// Retrieve the Window hosting the Panel.
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CefRefPtr<CefWindow> window = panel_->GetWindow();
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DCHECK(window);
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// Convert the point from screen to window coordinates.
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CefPoint window_point = screen_point;
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if (!window->ConvertPointFromScreen(window_point)) {
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return;
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}
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CefRect panel_bounds = panel_->GetBounds();
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if (last_nav_with_keyboard_) {
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// The user navigated last using the keyboard. Don't change menus using
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// mouse movements until the mouse exits and re-enters the Panel.
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if (panel_bounds.Contains(window_point)) {
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return;
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}
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last_nav_with_keyboard_ = false;
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}
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// Check that the point is inside the Panel.
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if (!panel_bounds.Contains(window_point)) {
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return;
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}
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const int active_menu_id = GetActiveMenuId();
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// Determine which MenuButton is under the specified point.
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for (int id = id_start_; id < id_next_; ++id) {
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// Skip the currently active MenuButton.
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if (id == active_menu_id) {
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continue;
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}
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CefRefPtr<CefView> button = panel_->GetViewForID(id);
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CefRect button_bounds = button->GetBounds();
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// Adjust for window coordinates.
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button_bounds.y += panel_bounds.y;
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if (CefIsRTL()) {
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// Adjust for right-to-left button layout.
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button_bounds.x =
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panel_bounds.width - button_bounds.x - button_bounds.width;
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}
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if (button_bounds.Contains(window_point)) {
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// Trigger the hovered MenuButton.
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TriggerMenuButton(button);
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break;
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}
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}
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}
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void ViewsMenuBar::UnhandledOpenSubmenu(CefRefPtr<CefMenuModel> menu_model,
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bool is_rtl) {
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TriggerNextMenu(is_rtl ? 1 : -1);
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}
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void ViewsMenuBar::UnhandledCloseSubmenu(CefRefPtr<CefMenuModel> menu_model,
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bool is_rtl) {
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TriggerNextMenu(is_rtl ? -1 : 1);
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}
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void ViewsMenuBar::MenuClosed(CefRefPtr<CefMenuModel> menu_model) {
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// Reset |last_nav_with_keyboard_| status whenever the main menu closes.
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if (!menu_model->IsSubMenu() && last_nav_with_keyboard_) {
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last_nav_with_keyboard_ = false;
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}
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}
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void ViewsMenuBar::EnsureMenuPanel() {
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if (panel_) {
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return;
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}
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panel_ = CefPanel::CreatePanel(nullptr);
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views_style::ApplyTo(panel_);
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// Use a horizontal box layout.
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CefBoxLayoutSettings top_panel_layout_settings;
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top_panel_layout_settings.horizontal = true;
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panel_->SetToBoxLayout(top_panel_layout_settings);
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}
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int ViewsMenuBar::GetActiveMenuId() {
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DCHECK(panel_);
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for (int id = id_start_; id < id_next_; ++id) {
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CefRefPtr<CefButton> button = panel_->GetViewForID(id)->AsButton();
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if (button->GetState() == CEF_BUTTON_STATE_PRESSED) {
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return id;
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}
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}
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return -1;
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}
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void ViewsMenuBar::TriggerNextMenu(int offset) {
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DCHECK(panel_);
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const int active_menu_id = GetActiveMenuId();
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const int menu_count = id_next_ - id_start_;
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const int active_menu_index = active_menu_id - id_start_;
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// Compute the modulus to avoid negative values.
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int next_menu_index = (active_menu_index + offset) % menu_count;
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if (next_menu_index < 0) {
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next_menu_index += menu_count;
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}
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// Cancel the existing menu. MenuClosed may be called.
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panel_->GetWindow()->CancelMenu();
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// Set status indicating that we navigated using the keyboard.
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last_nav_with_keyboard_ = true;
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// Show the new menu.
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TriggerMenuButton(panel_->GetViewForID(id_start_ + next_menu_index));
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}
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void ViewsMenuBar::TriggerMenuButton(CefRefPtr<CefView> button) {
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CefRefPtr<CefMenuButton> menu_button =
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button->AsButton()->AsLabelButton()->AsMenuButton();
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if (menu_button->IsFocusable()) {
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menu_button->RequestFocus();
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}
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menu_button->TriggerMenu();
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}
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} // namespace client
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