gecko-dev/dom/xbl/nsXBLEventHandler.cpp

162 строки
5.2 KiB
C++

/* -*- 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 "nsCOMPtr.h"
#include "nsAtom.h"
#include "nsIDOMEventListener.h"
#include "nsXBLPrototypeHandler.h"
#include "nsContentUtils.h"
#include "mozilla/dom/Event.h" // for Event
#include "mozilla/dom/EventBinding.h" // for Event
#include "mozilla/dom/EventTarget.h"
#include "mozilla/dom/KeyboardEvent.h"
#include "mozilla/TextEvents.h"
using namespace mozilla;
using namespace mozilla::dom;
nsXBLEventHandler::nsXBLEventHandler(nsXBLPrototypeHandler* aHandler)
: mProtoHandler(aHandler) {}
nsXBLEventHandler::~nsXBLEventHandler() {}
NS_IMPL_ISUPPORTS(nsXBLEventHandler, nsIDOMEventListener)
NS_IMETHODIMP
nsXBLEventHandler::HandleEvent(Event* aEvent) {
if (!mProtoHandler) return NS_ERROR_FAILURE;
uint8_t phase = mProtoHandler->GetPhase();
if (phase == NS_PHASE_TARGET) {
if (aEvent->EventPhase() != Event_Binding::AT_TARGET) {
return NS_OK;
}
}
if (!EventMatched(aEvent)) return NS_OK;
RefPtr<EventTarget> currentTarget = aEvent->GetCurrentTarget();
mProtoHandler->ExecuteHandler(currentTarget, aEvent);
return NS_OK;
}
nsXBLMouseEventHandler::nsXBLMouseEventHandler(nsXBLPrototypeHandler* aHandler)
: nsXBLEventHandler(aHandler) {}
nsXBLMouseEventHandler::~nsXBLMouseEventHandler() {}
bool nsXBLMouseEventHandler::EventMatched(Event* aEvent) {
MouseEvent* mouse = aEvent->AsMouseEvent();
return mouse && mProtoHandler->MouseEventMatched(mouse);
}
nsXBLKeyEventHandler::nsXBLKeyEventHandler(nsAtom* aEventType, uint8_t aPhase,
uint8_t aType)
: mEventType(aEventType),
mPhase(aPhase),
mType(aType),
mIsBoundToChrome(false) {}
nsXBLKeyEventHandler::~nsXBLKeyEventHandler() {}
NS_IMPL_ISUPPORTS(nsXBLKeyEventHandler, nsIDOMEventListener)
bool nsXBLKeyEventHandler::ExecuteMatchedHandlers(
KeyboardEvent* aKeyEvent, uint32_t aCharCode,
const IgnoreModifierState& aIgnoreModifierState) {
WidgetEvent* event = aKeyEvent->WidgetEventPtr();
nsCOMPtr<EventTarget> target = aKeyEvent->GetCurrentTarget();
bool executed = false;
for (uint32_t i = 0; i < mProtoHandlers.Length(); ++i) {
nsXBLPrototypeHandler* handler = mProtoHandlers[i];
bool hasAllowUntrustedAttr = handler->HasAllowUntrustedAttr();
if ((event->IsTrusted() ||
(hasAllowUntrustedAttr && handler->AllowUntrustedEvents()) ||
(!hasAllowUntrustedAttr && !mIsBoundToChrome)) &&
handler->KeyEventMatched(aKeyEvent, aCharCode, aIgnoreModifierState)) {
handler->ExecuteHandler(target, aKeyEvent);
executed = true;
}
}
#ifdef XP_WIN
// Windows native applications ignore Windows-Logo key state when checking
// shortcut keys even if the key is pressed. Therefore, if there is no
// shortcut key which exactly matches current modifier state, we should
// retry to look for a shortcut key without the Windows-Logo key press.
if (!executed && !aIgnoreModifierState.mOS) {
WidgetKeyboardEvent* keyEvent = event->AsKeyboardEvent();
if (keyEvent && keyEvent->IsOS()) {
IgnoreModifierState ignoreModifierState(aIgnoreModifierState);
ignoreModifierState.mOS = true;
return ExecuteMatchedHandlers(aKeyEvent, aCharCode, ignoreModifierState);
}
}
#endif
return executed;
}
NS_IMETHODIMP
nsXBLKeyEventHandler::HandleEvent(Event* aEvent) {
uint32_t count = mProtoHandlers.Length();
if (count == 0) return NS_ERROR_FAILURE;
if (mPhase == NS_PHASE_TARGET) {
if (aEvent->EventPhase() != Event_Binding::AT_TARGET) {
return NS_OK;
}
}
RefPtr<KeyboardEvent> key = aEvent->AsKeyboardEvent();
if (!key) {
return NS_OK;
}
WidgetKeyboardEvent* nativeKeyboardEvent =
aEvent->WidgetEventPtr()->AsKeyboardEvent();
MOZ_ASSERT(nativeKeyboardEvent);
AutoShortcutKeyCandidateArray shortcutKeys;
nativeKeyboardEvent->GetShortcutKeyCandidates(shortcutKeys);
if (shortcutKeys.IsEmpty()) {
ExecuteMatchedHandlers(key, 0, IgnoreModifierState());
return NS_OK;
}
for (uint32_t i = 0; i < shortcutKeys.Length(); ++i) {
IgnoreModifierState ignoreModifierState;
ignoreModifierState.mShift = shortcutKeys[i].mIgnoreShift;
if (ExecuteMatchedHandlers(key, shortcutKeys[i].mCharCode,
ignoreModifierState)) {
return NS_OK;
}
}
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////////////
already_AddRefed<nsXBLEventHandler> NS_NewXBLEventHandler(
nsXBLPrototypeHandler* aHandler, nsAtom* aEventType) {
RefPtr<nsXBLEventHandler> handler;
switch (nsContentUtils::GetEventClassID(nsDependentAtomString(aEventType))) {
case eDragEventClass:
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eSimpleGestureEventClass:
handler = new nsXBLMouseEventHandler(aHandler);
break;
default:
handler = new nsXBLEventHandler(aHandler);
break;
}
return handler.forget();
}