зеркало из https://github.com/mozilla/gecko-dev.git
121 строка
3.3 KiB
C++
121 строка
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "ShortcutKeys.h"
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#include "mozilla/KeyEventHandler.h"
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#include "nsContentUtils.h"
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#include "nsAtom.h"
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#include "mozilla/TextEvents.h"
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namespace mozilla {
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NS_IMPL_ISUPPORTS(ShortcutKeys, nsIObserver);
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StaticRefPtr<ShortcutKeys> ShortcutKeys::sInstance;
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ShortcutKeys::ShortcutKeys()
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: mBrowserHandlers(nullptr),
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mEditorHandlers(nullptr),
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mInputHandlers(nullptr),
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mTextAreaHandlers(nullptr) {
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MOZ_ASSERT(!sInstance, "Attempt to instantiate a second ShortcutKeys.");
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nsContentUtils::RegisterShutdownObserver(this);
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}
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ShortcutKeys::~ShortcutKeys() {
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delete mBrowserHandlers;
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delete mEditorHandlers;
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delete mInputHandlers;
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delete mTextAreaHandlers;
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}
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nsresult ShortcutKeys::Observe(nsISupports* aSubject, const char* aTopic,
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const char16_t* aData) {
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// Clear our strong reference so we can clean up.
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ShortcutKeys::Shutdown();
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return NS_OK;
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}
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void ShortcutKeys::Shutdown() { sInstance = nullptr; }
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/* static */
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KeyEventHandler* ShortcutKeys::GetHandlers(HandlerType aType) {
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if (!sInstance) {
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sInstance = new ShortcutKeys();
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}
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return sInstance->EnsureHandlers(aType);
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}
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/* static */
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nsAtom* ShortcutKeys::ConvertEventToDOMEventType(
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const WidgetKeyboardEvent* aWidgetKeyboardEvent) {
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switch (aWidgetKeyboardEvent->mMessage) {
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case eKeyDown:
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return nsGkAtoms::keydown;
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case eKeyUp:
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return nsGkAtoms::keyup;
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// eAccessKeyNotFound event is always created from eKeyPress event and
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// the original eKeyPress event has stopped its propagation before
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// dispatched into the DOM tree in this process and not matched with remote
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// content's access keys. So, we should treat it as an eKeyPress event and
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// execute a command if it's registered as a shortcut key.
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case eKeyPress:
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case eAccessKeyNotFound:
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return nsGkAtoms::keypress;
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default:
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MOZ_ASSERT_UNREACHABLE(
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"All event messages relating to shortcut keys should be handled");
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return nullptr;
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}
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}
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KeyEventHandler* ShortcutKeys::EnsureHandlers(HandlerType aType) {
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ShortcutKeyData* keyData;
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KeyEventHandler** cache;
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switch (aType) {
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case HandlerType::eBrowser:
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keyData = &sBrowserHandlers[0];
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cache = &mBrowserHandlers;
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break;
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case HandlerType::eEditor:
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keyData = &sEditorHandlers[0];
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cache = &mEditorHandlers;
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break;
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case HandlerType::eInput:
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keyData = &sInputHandlers[0];
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cache = &mInputHandlers;
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break;
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case HandlerType::eTextArea:
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keyData = &sTextAreaHandlers[0];
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cache = &mTextAreaHandlers;
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break;
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default:
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MOZ_ASSERT(false, "Unknown handler type requested.");
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}
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if (*cache) {
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return *cache;
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}
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KeyEventHandler* lastHandler = nullptr;
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while (keyData->event) {
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KeyEventHandler* handler = new KeyEventHandler(keyData);
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if (lastHandler) {
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lastHandler->SetNextHandler(handler);
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} else {
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*cache = handler;
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}
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lastHandler = handler;
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keyData++;
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}
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return *cache;
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}
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} // namespace mozilla
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