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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ShortcutKeys.h"
#include "mozilla/KeyEventHandler.h"
#include "nsContentUtils.h"
#include "nsAtom.h"
#include "mozilla/TextEvents.h"
namespace mozilla {
NS_IMPL_ISUPPORTS(ShortcutKeys, nsIObserver);
StaticRefPtr<ShortcutKeys> ShortcutKeys::sInstance;
ShortcutKeys::ShortcutKeys()
: mBrowserHandlers(nullptr),
mEditorHandlers(nullptr),
mInputHandlers(nullptr),
mTextAreaHandlers(nullptr) {
MOZ_ASSERT(!sInstance, "Attempt to instantiate a second ShortcutKeys.");
nsContentUtils::RegisterShutdownObserver(this);
}
ShortcutKeys::~ShortcutKeys() {
delete mBrowserHandlers;
delete mEditorHandlers;
delete mInputHandlers;
delete mTextAreaHandlers;
}
nsresult ShortcutKeys::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
// Clear our strong reference so we can clean up.
ShortcutKeys::Shutdown();
return NS_OK;
}
void ShortcutKeys::Shutdown() { sInstance = nullptr; }
/* static */
KeyEventHandler* ShortcutKeys::GetHandlers(HandlerType aType) {
if (!sInstance) {
sInstance = new ShortcutKeys();
}
return sInstance->EnsureHandlers(aType);
}
/* static */
nsAtom* ShortcutKeys::ConvertEventToDOMEventType(
const WidgetKeyboardEvent* aWidgetKeyboardEvent) {
switch (aWidgetKeyboardEvent->mMessage) {
case eKeyDown:
return nsGkAtoms::keydown;
case eKeyUp:
return nsGkAtoms::keyup;
// eAccessKeyNotFound event is always created from eKeyPress event and
// the original eKeyPress event has stopped its propagation before
// dispatched into the DOM tree in this process and not matched with remote
// content's access keys. So, we should treat it as an eKeyPress event and
// execute a command if it's registered as a shortcut key.
case eKeyPress:
case eAccessKeyNotFound:
return nsGkAtoms::keypress;
default:
MOZ_ASSERT_UNREACHABLE(
"All event messages relating to shortcut keys should be handled");
return nullptr;
}
}
KeyEventHandler* ShortcutKeys::EnsureHandlers(HandlerType aType) {
ShortcutKeyData* keyData;
KeyEventHandler** cache;
switch (aType) {
case HandlerType::eBrowser:
keyData = &sBrowserHandlers[0];
cache = &mBrowserHandlers;
break;
case HandlerType::eEditor:
keyData = &sEditorHandlers[0];
cache = &mEditorHandlers;
break;
case HandlerType::eInput:
keyData = &sInputHandlers[0];
cache = &mInputHandlers;
break;
case HandlerType::eTextArea:
keyData = &sTextAreaHandlers[0];
cache = &mTextAreaHandlers;
break;
default:
MOZ_ASSERT(false, "Unknown handler type requested.");
}
if (*cache) {
return *cache;
}
KeyEventHandler* lastHandler = nullptr;
while (keyData->event) {
KeyEventHandler* handler = new KeyEventHandler(keyData);
if (lastHandler) {
lastHandler->SetNextHandler(handler);
} else {
*cache = handler;
}
lastHandler = handler;
keyData++;
}
return *cache;
}
} // namespace mozilla
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