зеркало из https://github.com/mozilla/gecko-dev.git
439 строки
13 KiB
C++
439 строки
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsMenuBarListener.h"
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#include "nsMenuBarFrame.h"
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#include "nsMenuPopupFrame.h"
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#include "nsIDOMEvent.h"
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// Drag & Drop, Clipboard
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#include "nsIServiceManager.h"
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#include "nsWidgetsCID.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMKeyEvent.h"
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#include "nsIContent.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMElement.h"
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#include "nsContentUtils.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/TextEvents.h"
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using namespace mozilla;
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/*
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* nsMenuBarListener implementation
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*/
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NS_IMPL_ISUPPORTS(nsMenuBarListener, nsIDOMEventListener)
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////////////////////////////////////////////////////////////////////////
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int32_t nsMenuBarListener::mAccessKey = -1;
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Modifiers nsMenuBarListener::mAccessKeyMask = 0;
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bool nsMenuBarListener::mAccessKeyFocuses = false;
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nsMenuBarListener::nsMenuBarListener(nsMenuBarFrame* aMenuBar)
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:mAccessKeyDown(false), mAccessKeyDownCanceled(false)
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{
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mMenuBarFrame = aMenuBar;
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}
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////////////////////////////////////////////////////////////////////////
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nsMenuBarListener::~nsMenuBarListener()
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{
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}
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void
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nsMenuBarListener::OnDestroyMenuBarFrame()
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{
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mMenuBarFrame = nullptr;
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}
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void
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nsMenuBarListener::InitializeStatics()
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{
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Preferences::AddBoolVarCache(&mAccessKeyFocuses,
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"ui.key.menuAccessKeyFocuses");
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}
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nsresult
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nsMenuBarListener::GetMenuAccessKey(int32_t* aAccessKey)
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{
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if (!aAccessKey)
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return NS_ERROR_INVALID_POINTER;
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InitAccessKey();
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*aAccessKey = mAccessKey;
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return NS_OK;
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}
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void nsMenuBarListener::InitAccessKey()
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{
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if (mAccessKey >= 0)
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return;
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// Compiled-in defaults, in case we can't get LookAndFeel --
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// mac doesn't have menu shortcuts, other platforms use alt.
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#ifdef XP_MACOSX
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mAccessKey = 0;
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mAccessKeyMask = 0;
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#else
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mAccessKey = nsIDOMKeyEvent::DOM_VK_ALT;
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mAccessKeyMask = MODIFIER_ALT;
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#endif
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// Get the menu access key value from prefs, overriding the default:
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mAccessKey = Preferences::GetInt("ui.key.menuAccessKey", mAccessKey);
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if (mAccessKey == nsIDOMKeyEvent::DOM_VK_SHIFT)
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mAccessKeyMask = MODIFIER_SHIFT;
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else if (mAccessKey == nsIDOMKeyEvent::DOM_VK_CONTROL)
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mAccessKeyMask = MODIFIER_CONTROL;
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else if (mAccessKey == nsIDOMKeyEvent::DOM_VK_ALT)
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mAccessKeyMask = MODIFIER_ALT;
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else if (mAccessKey == nsIDOMKeyEvent::DOM_VK_META)
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mAccessKeyMask = MODIFIER_META;
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else if (mAccessKey == nsIDOMKeyEvent::DOM_VK_WIN)
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mAccessKeyMask = MODIFIER_OS;
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}
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void
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nsMenuBarListener::ToggleMenuActiveState()
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{
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nsMenuFrame* closemenu = mMenuBarFrame->ToggleMenuActiveState();
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nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
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if (pm && closemenu) {
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nsMenuPopupFrame* popupFrame = closemenu->GetPopup();
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if (popupFrame)
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pm->HidePopup(popupFrame->GetContent(), false, false, true, false);
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}
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}
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////////////////////////////////////////////////////////////////////////
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nsresult
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nsMenuBarListener::KeyUp(nsIDOMEvent* aKeyEvent)
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{
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nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aKeyEvent);
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if (!keyEvent) {
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return NS_OK;
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}
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InitAccessKey();
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//handlers shouldn't be triggered by non-trusted events.
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bool trustedEvent = false;
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aKeyEvent->GetIsTrusted(&trustedEvent);
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if (!trustedEvent) {
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return NS_OK;
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}
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if (mAccessKey && mAccessKeyFocuses)
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{
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bool defaultPrevented = false;
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aKeyEvent->GetDefaultPrevented(&defaultPrevented);
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// On a press of the ALT key by itself, we toggle the menu's
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// active/inactive state.
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// Get the ascii key code.
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uint32_t theChar;
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keyEvent->GetKeyCode(&theChar);
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if (!defaultPrevented && mAccessKeyDown && !mAccessKeyDownCanceled &&
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(int32_t)theChar == mAccessKey)
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{
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// The access key was down and is now up, and no other
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// keys were pressed in between.
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bool toggleMenuActiveState = true;
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if (!mMenuBarFrame->IsActive()) {
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// First, close all existing popups because other popups shouldn't
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// handle key events when menubar is active and IME should be
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// disabled.
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nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
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if (pm) {
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pm->Rollup(0, false, nullptr, nullptr);
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}
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// If menubar active state is changed or the menubar is destroyed
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// during closing the popups, we should do nothing anymore.
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toggleMenuActiveState = !Destroyed() && !mMenuBarFrame->IsActive();
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}
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if (toggleMenuActiveState) {
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if (!mMenuBarFrame->IsActive()) {
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mMenuBarFrame->SetActiveByKeyboard();
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}
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ToggleMenuActiveState();
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}
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}
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mAccessKeyDown = false;
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mAccessKeyDownCanceled = false;
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bool active = !Destroyed() && mMenuBarFrame->IsActive();
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if (active) {
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aKeyEvent->StopPropagation();
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aKeyEvent->PreventDefault();
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return NS_OK; // I am consuming event
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}
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}
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return NS_OK; // means I am NOT consuming event
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}
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////////////////////////////////////////////////////////////////////////
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nsresult
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nsMenuBarListener::KeyPress(nsIDOMEvent* aKeyEvent)
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{
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// if event has already been handled, bail
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if (aKeyEvent) {
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bool eventHandled = false;
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aKeyEvent->GetDefaultPrevented(&eventHandled);
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if (eventHandled) {
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return NS_OK; // don't consume event
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}
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}
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//handlers shouldn't be triggered by non-trusted events.
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bool trustedEvent = false;
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if (aKeyEvent) {
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aKeyEvent->GetIsTrusted(&trustedEvent);
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}
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if (!trustedEvent)
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return NS_OK;
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nsresult retVal = NS_OK; // default is to not consume event
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InitAccessKey();
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if (mAccessKey)
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{
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bool preventDefault;
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aKeyEvent->GetDefaultPrevented(&preventDefault);
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if (!preventDefault) {
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nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aKeyEvent);
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uint32_t keyCode, charCode;
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keyEvent->GetKeyCode(&keyCode);
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keyEvent->GetCharCode(&charCode);
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bool hasAccessKeyCandidates = charCode != 0;
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if (!hasAccessKeyCandidates) {
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WidgetKeyboardEvent* nativeKeyEvent =
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aKeyEvent->GetInternalNSEvent()->AsKeyboardEvent();
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if (nativeKeyEvent) {
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AutoTArray<uint32_t, 10> keys;
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nsContentUtils::GetAccessKeyCandidates(nativeKeyEvent, keys);
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hasAccessKeyCandidates = !keys.IsEmpty();
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}
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}
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// Cancel the access key flag unless we are pressing the access key.
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if (keyCode != (uint32_t)mAccessKey) {
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mAccessKeyDownCanceled = true;
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}
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if (IsAccessKeyPressed(keyEvent) && hasAccessKeyCandidates) {
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// Do shortcut navigation.
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// A letter was pressed. We want to see if a shortcut gets matched. If
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// so, we'll know the menu got activated.
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nsMenuFrame* result = mMenuBarFrame->FindMenuWithShortcut(keyEvent);
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if (result) {
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mMenuBarFrame->SetActiveByKeyboard();
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mMenuBarFrame->SetActive(true);
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result->OpenMenu(true);
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// The opened menu will listen next keyup event.
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// Therefore, we should clear the keydown flags here.
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mAccessKeyDown = mAccessKeyDownCanceled = false;
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aKeyEvent->StopPropagation();
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aKeyEvent->PreventDefault();
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retVal = NS_OK; // I am consuming event
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}
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}
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#ifndef XP_MACOSX
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// Also need to handle F10 specially on Non-Mac platform.
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else if (keyCode == NS_VK_F10) {
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if ((GetModifiersForAccessKey(keyEvent) & ~MODIFIER_CONTROL) == 0) {
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// The F10 key just went down by itself or with ctrl pressed.
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// In Windows, both of these activate the menu bar.
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mMenuBarFrame->SetActiveByKeyboard();
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ToggleMenuActiveState();
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if (mMenuBarFrame->IsActive()) {
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#ifdef MOZ_WIDGET_GTK
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// In GTK, this also opens the first menu.
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mMenuBarFrame->GetCurrentMenuItem()->OpenMenu(true);
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#endif
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aKeyEvent->StopPropagation();
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aKeyEvent->PreventDefault();
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return NS_OK; // consume the event
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}
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}
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}
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#endif // !XP_MACOSX
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}
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}
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return retVal;
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}
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bool
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nsMenuBarListener::IsAccessKeyPressed(nsIDOMKeyEvent* aKeyEvent)
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{
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InitAccessKey();
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// No other modifiers are allowed to be down except for Shift.
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uint32_t modifiers = GetModifiersForAccessKey(aKeyEvent);
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return (mAccessKeyMask != MODIFIER_SHIFT &&
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(modifiers & mAccessKeyMask) &&
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(modifiers & ~(mAccessKeyMask | MODIFIER_SHIFT)) == 0);
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}
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Modifiers
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nsMenuBarListener::GetModifiersForAccessKey(nsIDOMKeyEvent* aKeyEvent)
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{
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WidgetInputEvent* inputEvent =
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aKeyEvent->AsEvent()->GetInternalNSEvent()->AsInputEvent();
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MOZ_ASSERT(inputEvent);
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static const Modifiers kPossibleModifiersForAccessKey =
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(MODIFIER_SHIFT | MODIFIER_CONTROL | MODIFIER_ALT | MODIFIER_META |
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MODIFIER_OS);
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return (inputEvent->modifiers & kPossibleModifiersForAccessKey);
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}
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////////////////////////////////////////////////////////////////////////
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nsresult
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nsMenuBarListener::KeyDown(nsIDOMEvent* aKeyEvent)
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{
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InitAccessKey();
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//handlers shouldn't be triggered by non-trusted events.
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bool trustedEvent = false;
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if (aKeyEvent) {
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aKeyEvent->GetIsTrusted(&trustedEvent);
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}
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if (!trustedEvent)
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return NS_OK;
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if (mAccessKey && mAccessKeyFocuses)
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{
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bool defaultPrevented = false;
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aKeyEvent->GetDefaultPrevented(&defaultPrevented);
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nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aKeyEvent);
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uint32_t theChar;
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keyEvent->GetKeyCode(&theChar);
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// No other modifiers can be down.
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// Especially CTRL. CTRL+ALT == AltGR, and we'll fuck up on non-US
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// enhanced 102-key keyboards if we don't check this.
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bool isAccessKeyDownEvent =
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((theChar == (uint32_t)mAccessKey) &&
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(GetModifiersForAccessKey(keyEvent) & ~mAccessKeyMask) == 0);
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if (!mAccessKeyDown) {
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// If accesskey isn't being pressed and the key isn't the accesskey,
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// ignore the event.
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if (!isAccessKeyDownEvent) {
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return NS_OK;
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}
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// Otherwise, accept the accesskey state.
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mAccessKeyDown = true;
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// If default is prevented already, cancel the access key down.
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mAccessKeyDownCanceled = defaultPrevented;
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return NS_OK;
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}
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// If the pressed accesskey was canceled already or the event was
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// consumed already, ignore the event.
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if (mAccessKeyDownCanceled || defaultPrevented) {
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return NS_OK;
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}
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// Some key other than the access key just went down,
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// so we won't activate the menu bar when the access key is released.
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mAccessKeyDownCanceled = !isAccessKeyDownEvent;
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}
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return NS_OK; // means I am NOT consuming event
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}
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////////////////////////////////////////////////////////////////////////
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nsresult
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nsMenuBarListener::Blur(nsIDOMEvent* aEvent)
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{
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if (!mMenuBarFrame->IsMenuOpen() && mMenuBarFrame->IsActive()) {
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ToggleMenuActiveState();
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}
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// Reset the accesskey state because we cannot receive the keyup event for
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// the pressing accesskey.
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mAccessKeyDown = false;
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mAccessKeyDownCanceled = false;
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return NS_OK; // means I am NOT consuming event
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}
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////////////////////////////////////////////////////////////////////////
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nsresult
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nsMenuBarListener::MouseDown(nsIDOMEvent* aMouseEvent)
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{
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// NOTE: MouseDown method listens all phases
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// Even if the mousedown event is canceled, it means the user don't want
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// to activate the menu. Therefore, we need to record it at capturing (or
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// target) phase.
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if (mAccessKeyDown) {
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mAccessKeyDownCanceled = true;
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}
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uint16_t phase = 0;
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nsresult rv = aMouseEvent->GetEventPhase(&phase);
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NS_ENSURE_SUCCESS(rv, rv);
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// Don't do anything at capturing phase, any behavior should be cancelable.
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if (phase == nsIDOMEvent::CAPTURING_PHASE) {
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return NS_OK;
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}
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if (!mMenuBarFrame->IsMenuOpen() && mMenuBarFrame->IsActive())
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ToggleMenuActiveState();
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return NS_OK; // means I am NOT consuming event
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}
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////////////////////////////////////////////////////////////////////////
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nsresult
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nsMenuBarListener::HandleEvent(nsIDOMEvent* aEvent)
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{
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// If the menu bar is collapsed, don't do anything.
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if (!mMenuBarFrame->StyleVisibility()->IsVisible()) {
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return NS_OK;
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}
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nsAutoString eventType;
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aEvent->GetType(eventType);
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if (eventType.EqualsLiteral("keyup")) {
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return KeyUp(aEvent);
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}
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if (eventType.EqualsLiteral("keydown")) {
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return KeyDown(aEvent);
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}
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if (eventType.EqualsLiteral("keypress")) {
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return KeyPress(aEvent);
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}
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if (eventType.EqualsLiteral("blur")) {
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return Blur(aEvent);
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}
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if (eventType.EqualsLiteral("mousedown")) {
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return MouseDown(aEvent);
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}
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NS_ABORT();
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return NS_OK;
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}
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