gecko-dev/dom/xbl/nsXBLEventHandler.cpp

185 lines
4.8 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsIAtom.h"
#include "nsIDOMEventListener.h"
#include "nsIDOMKeyEvent.h"
#include "nsIDOMMouseEvent.h"
#include "nsXBLPrototypeHandler.h"
#include "nsContentUtils.h"
#include "mozilla/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()
#include "mozilla/dom/EventTarget.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(nsIDOMEvent* aEvent)
{
if (!mProtoHandler)
return NS_ERROR_FAILURE;
uint8_t phase = mProtoHandler->GetPhase();
if (phase == NS_PHASE_TARGET) {
uint16_t eventPhase;
aEvent->GetEventPhase(&eventPhase);
if (eventPhase != nsIDOMEvent::AT_TARGET)
return NS_OK;
}
if (!EventMatched(aEvent))
return NS_OK;
mProtoHandler->ExecuteHandler(aEvent->InternalDOMEvent()->GetCurrentTarget(),
aEvent);
return NS_OK;
}
nsXBLMouseEventHandler::nsXBLMouseEventHandler(nsXBLPrototypeHandler* aHandler)
: nsXBLEventHandler(aHandler)
{
}
nsXBLMouseEventHandler::~nsXBLMouseEventHandler()
{
}
bool
nsXBLMouseEventHandler::EventMatched(nsIDOMEvent* aEvent)
{
nsCOMPtr<nsIDOMMouseEvent> mouse(do_QueryInterface(aEvent));
return mouse && mProtoHandler->MouseEventMatched(mouse);
}
nsXBLKeyEventHandler::nsXBLKeyEventHandler(nsIAtom* aEventType, uint8_t aPhase,
uint8_t aType)
: mEventType(aEventType),
mPhase(aPhase),
mType(aType),
mIsBoundToChrome(false),
mUsingContentXBLScope(false)
{
}
nsXBLKeyEventHandler::~nsXBLKeyEventHandler()
{
}
NS_IMPL_ISUPPORTS(nsXBLKeyEventHandler, nsIDOMEventListener)
bool
nsXBLKeyEventHandler::ExecuteMatchedHandlers(nsIDOMKeyEvent* aKeyEvent,
uint32_t aCharCode,
bool aIgnoreShiftKey)
{
bool trustedEvent = false;
aKeyEvent->GetIsTrusted(&trustedEvent);
nsCOMPtr<EventTarget> target = aKeyEvent->InternalDOMEvent()->GetCurrentTarget();
bool executed = false;
for (uint32_t i = 0; i < mProtoHandlers.Length(); ++i) {
nsXBLPrototypeHandler* handler = mProtoHandlers[i];
bool hasAllowUntrustedAttr = handler->HasAllowUntrustedAttr();
if ((trustedEvent ||
(hasAllowUntrustedAttr && handler->AllowUntrustedEvents()) ||
(!hasAllowUntrustedAttr && !mIsBoundToChrome && !mUsingContentXBLScope)) &&
handler->KeyEventMatched(aKeyEvent, aCharCode, aIgnoreShiftKey)) {
handler->ExecuteHandler(target, aKeyEvent);
executed = true;
}
}
return executed;
}
NS_IMETHODIMP
nsXBLKeyEventHandler::HandleEvent(nsIDOMEvent* aEvent)
{
uint32_t count = mProtoHandlers.Length();
if (count == 0)
return NS_ERROR_FAILURE;
if (mPhase == NS_PHASE_TARGET) {
uint16_t eventPhase;
aEvent->GetEventPhase(&eventPhase);
if (eventPhase != nsIDOMEvent::AT_TARGET)
return NS_OK;
}
nsCOMPtr<nsIDOMKeyEvent> key(do_QueryInterface(aEvent));
if (!key)
return NS_OK;
nsAutoTArray<nsShortcutCandidate, 10> accessKeys;
nsContentUtils::GetAccelKeyCandidates(key, accessKeys);
if (accessKeys.IsEmpty()) {
ExecuteMatchedHandlers(key, 0, false);
return NS_OK;
}
for (uint32_t i = 0; i < accessKeys.Length(); ++i) {
if (ExecuteMatchedHandlers(key, accessKeys[i].mCharCode,
accessKeys[i].mIgnoreShift))
return NS_OK;
}
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////////////
nsresult
NS_NewXBLEventHandler(nsXBLPrototypeHandler* aHandler,
nsIAtom* aEventType,
nsXBLEventHandler** aResult)
{
switch (nsContentUtils::GetEventClassID(nsDependentAtomString(aEventType))) {
case eDragEventClass:
case eMouseEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eSimpleGestureEventClass:
*aResult = new nsXBLMouseEventHandler(aHandler);
break;
default:
*aResult = new nsXBLEventHandler(aHandler);
break;
}
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
nsresult
NS_NewXBLKeyEventHandler(nsIAtom* aEventType, uint8_t aPhase, uint8_t aType,
nsXBLKeyEventHandler** aResult)
{
*aResult = new nsXBLKeyEventHandler(aEventType, aPhase, aType);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}