mirror of
https://github.com/classilla/tenfourfox.git
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627 lines
19 KiB
C++
627 lines
19 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 "nsCOMPtr.h"
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#include "nsXBLPrototypeHandler.h"
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#include "nsXBLWindowKeyHandler.h"
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#include "nsIContent.h"
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#include "nsIAtom.h"
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#include "nsIDOMKeyEvent.h"
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#include "nsXBLService.h"
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#include "nsIServiceManager.h"
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#include "nsGkAtoms.h"
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#include "nsXBLDocumentInfo.h"
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#include "nsIDOMElement.h"
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#include "nsFocusManager.h"
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#include "nsIURI.h"
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#include "nsNetUtil.h"
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#include "nsContentUtils.h"
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#include "nsXBLPrototypeBinding.h"
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#include "nsPIDOMWindow.h"
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#include "nsIDocShell.h"
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#include "nsIPresShell.h"
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#include "mozilla/EventStateManager.h"
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#include "nsISelectionController.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/TextEvents.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/Event.h"
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#include "nsIEditor.h"
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#include "nsIHTMLEditor.h"
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#include "nsIDOMDocument.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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class nsXBLSpecialDocInfo : public nsIObserver
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{
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public:
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RefPtr<nsXBLDocumentInfo> mHTMLBindings;
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RefPtr<nsXBLDocumentInfo> mUserHTMLBindings;
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static const char sHTMLBindingStr[];
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static const char sUserHTMLBindingStr[];
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bool mInitialized;
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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void LoadDocInfo();
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void GetAllHandlers(const char* aType,
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nsXBLPrototypeHandler** handler,
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nsXBLPrototypeHandler** userHandler);
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void GetHandlers(nsXBLDocumentInfo* aInfo,
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const nsACString& aRef,
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nsXBLPrototypeHandler** aResult);
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nsXBLSpecialDocInfo() : mInitialized(false) {}
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protected:
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virtual ~nsXBLSpecialDocInfo() {}
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};
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const char nsXBLSpecialDocInfo::sHTMLBindingStr[] =
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"chrome://global/content/platformHTMLBindings.xml";
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NS_IMPL_ISUPPORTS(nsXBLSpecialDocInfo, nsIObserver)
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NS_IMETHODIMP
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nsXBLSpecialDocInfo::Observe(nsISupports* aSubject,
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const char* aTopic,
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const char16_t* aData)
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{
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MOZ_ASSERT(!strcmp(aTopic, "xpcom-shutdown"), "wrong topic");
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// On shutdown, clear our fields to avoid an extra cycle collection.
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mHTMLBindings = nullptr;
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mUserHTMLBindings = nullptr;
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mInitialized = false;
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nsContentUtils::UnregisterShutdownObserver(this);
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return NS_OK;
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}
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void nsXBLSpecialDocInfo::LoadDocInfo()
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{
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if (mInitialized)
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return;
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mInitialized = true;
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nsContentUtils::RegisterShutdownObserver(this);
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nsXBLService* xblService = nsXBLService::GetInstance();
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if (!xblService)
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return;
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// Obtain the platform doc info
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nsCOMPtr<nsIURI> bindingURI;
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NS_NewURI(getter_AddRefs(bindingURI), sHTMLBindingStr);
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if (!bindingURI) {
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return;
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}
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xblService->LoadBindingDocumentInfo(nullptr, nullptr,
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bindingURI,
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nullptr,
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true,
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getter_AddRefs(mHTMLBindings));
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const nsAdoptingCString& userHTMLBindingStr =
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Preferences::GetCString("dom.userHTMLBindings.uri");
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if (!userHTMLBindingStr.IsEmpty()) {
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NS_NewURI(getter_AddRefs(bindingURI), userHTMLBindingStr);
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if (!bindingURI) {
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return;
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}
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xblService->LoadBindingDocumentInfo(nullptr, nullptr,
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bindingURI,
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nullptr,
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true,
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getter_AddRefs(mUserHTMLBindings));
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}
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}
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//
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// GetHandlers
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//
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//
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void
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nsXBLSpecialDocInfo::GetHandlers(nsXBLDocumentInfo* aInfo,
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const nsACString& aRef,
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nsXBLPrototypeHandler** aResult)
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{
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nsXBLPrototypeBinding* binding = aInfo->GetPrototypeBinding(aRef);
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NS_ASSERTION(binding, "No binding found for the XBL window key handler.");
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if (!binding)
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return;
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*aResult = binding->GetPrototypeHandlers();
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}
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void
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nsXBLSpecialDocInfo::GetAllHandlers(const char* aType,
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nsXBLPrototypeHandler** aHandler,
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nsXBLPrototypeHandler** aUserHandler)
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{
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if (mUserHTMLBindings) {
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nsAutoCString type(aType);
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type.AppendLiteral("User");
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GetHandlers(mUserHTMLBindings, type, aUserHandler);
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}
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if (mHTMLBindings) {
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GetHandlers(mHTMLBindings, nsDependentCString(aType), aHandler);
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}
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}
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// Init statics
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nsXBLSpecialDocInfo* nsXBLWindowKeyHandler::sXBLSpecialDocInfo = nullptr;
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uint32_t nsXBLWindowKeyHandler::sRefCnt = 0;
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nsXBLWindowKeyHandler::nsXBLWindowKeyHandler(nsIDOMElement* aElement,
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EventTarget* aTarget)
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: mTarget(aTarget),
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mHandler(nullptr),
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mUserHandler(nullptr)
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{
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mWeakPtrForElement = do_GetWeakReference(aElement);
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++sRefCnt;
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}
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nsXBLWindowKeyHandler::~nsXBLWindowKeyHandler()
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{
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// If mWeakPtrForElement is non-null, we created a prototype handler.
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if (mWeakPtrForElement)
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delete mHandler;
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--sRefCnt;
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if (!sRefCnt) {
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NS_IF_RELEASE(sXBLSpecialDocInfo);
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}
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}
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NS_IMPL_ISUPPORTS(nsXBLWindowKeyHandler,
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nsIDOMEventListener)
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static void
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BuildHandlerChain(nsIContent* aContent, nsXBLPrototypeHandler** aResult)
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{
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*aResult = nullptr;
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// Since we chain each handler onto the next handler,
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// we'll enumerate them here in reverse so that when we
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// walk the chain they'll come out in the original order
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for (nsIContent* key = aContent->GetLastChild();
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key;
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key = key->GetPreviousSibling()) {
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if (key->NodeInfo()->Equals(nsGkAtoms::key, kNameSpaceID_XUL)) {
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// Check whether the key element has empty value at key/char attribute.
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// Such element is used by localizers for alternative shortcut key
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// definition on the locale. See bug 426501.
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nsAutoString valKey, valCharCode, valKeyCode;
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bool attrExists =
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key->GetAttr(kNameSpaceID_None, nsGkAtoms::key, valKey) ||
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key->GetAttr(kNameSpaceID_None, nsGkAtoms::charcode, valCharCode) ||
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key->GetAttr(kNameSpaceID_None, nsGkAtoms::keycode, valKeyCode);
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if (attrExists &&
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valKey.IsEmpty() && valCharCode.IsEmpty() && valKeyCode.IsEmpty())
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continue;
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nsXBLPrototypeHandler* handler = new nsXBLPrototypeHandler(key);
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handler->SetNextHandler(*aResult);
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*aResult = handler;
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}
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}
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}
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//
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// EnsureHandlers
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//
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// Lazily load the XBL handlers. Overridden to handle being attached
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// to a particular element rather than the document
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//
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nsresult
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nsXBLWindowKeyHandler::EnsureHandlers()
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{
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nsCOMPtr<Element> el = GetElement();
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NS_ENSURE_STATE(!mWeakPtrForElement || el);
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if (el) {
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// We are actually a XUL <keyset>.
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if (mHandler)
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return NS_OK;
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nsCOMPtr<nsIContent> content(do_QueryInterface(el));
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BuildHandlerChain(content, &mHandler);
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} else { // We are an XBL file of handlers.
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if (!sXBLSpecialDocInfo) {
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sXBLSpecialDocInfo = new nsXBLSpecialDocInfo();
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NS_ADDREF(sXBLSpecialDocInfo);
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}
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sXBLSpecialDocInfo->LoadDocInfo();
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// Now determine which handlers we should be using.
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if (IsHTMLEditableFieldFocused()) {
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sXBLSpecialDocInfo->GetAllHandlers("editor", &mHandler, &mUserHandler);
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}
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else {
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sXBLSpecialDocInfo->GetAllHandlers("browser", &mHandler, &mUserHandler);
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}
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}
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return NS_OK;
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}
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nsresult
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nsXBLWindowKeyHandler::WalkHandlers(nsIDOMKeyEvent* aKeyEvent, nsIAtom* aEventType)
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{
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bool prevent;
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aKeyEvent->GetDefaultPrevented(&prevent);
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if (prevent)
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return NS_OK;
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bool trustedEvent = false;
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// Don't process the event if it was not dispatched from a trusted source
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aKeyEvent->GetIsTrusted(&trustedEvent);
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if (!trustedEvent)
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return NS_OK;
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nsresult rv = EnsureHandlers();
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NS_ENSURE_SUCCESS(rv, rv);
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bool isDisabled;
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nsCOMPtr<Element> el = GetElement(&isDisabled);
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if (!el) {
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if (mUserHandler) {
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WalkHandlersInternal(aKeyEvent, aEventType, mUserHandler, true);
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aKeyEvent->GetDefaultPrevented(&prevent);
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if (prevent)
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return NS_OK; // Handled by the user bindings. Our work here is done.
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}
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}
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// skip keysets that are disabled
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if (el && isDisabled) {
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return NS_OK;
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}
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WalkHandlersInternal(aKeyEvent, aEventType, mHandler, true);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXBLWindowKeyHandler::HandleEvent(nsIDOMEvent* aEvent)
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{
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nsCOMPtr<nsIDOMKeyEvent> keyEvent(do_QueryInterface(aEvent));
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NS_ENSURE_TRUE(keyEvent, NS_ERROR_INVALID_ARG);
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uint16_t eventPhase;
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aEvent->GetEventPhase(&eventPhase);
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if (eventPhase == nsIDOMEvent::CAPTURING_PHASE) {
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HandleEventOnCapture(keyEvent);
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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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nsCOMPtr<nsIAtom> eventTypeAtom = do_GetAtom(eventType);
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NS_ENSURE_TRUE(eventTypeAtom, NS_ERROR_OUT_OF_MEMORY);
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return WalkHandlers(keyEvent, eventTypeAtom);
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}
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void
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nsXBLWindowKeyHandler::HandleEventOnCapture(nsIDOMKeyEvent* aEvent)
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{
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WidgetKeyboardEvent* widgetEvent =
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aEvent->GetInternalNSEvent()->AsKeyboardEvent();
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if (widgetEvent->mFlags.mNoCrossProcessBoundaryForwarding) {
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return;
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}
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nsCOMPtr<mozilla::dom::Element> originalTarget =
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do_QueryInterface(aEvent->GetInternalNSEvent()->originalTarget);
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if (!EventStateManager::IsRemoteTarget(originalTarget)) {
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return;
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}
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bool aReservedForChrome = false;
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if (!HasHandlerForEvent(aEvent, &aReservedForChrome)) {
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return;
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}
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if (aReservedForChrome) {
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// For reserved commands (such as Open New Tab), we don't to wait for
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// the content to answer (so mWantReplyFromContentProcess remains false),
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// neither to give a chance for content to override its behavior.
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widgetEvent->mFlags.mNoCrossProcessBoundaryForwarding = true;
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} else {
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// Inform the child process that this is a event that we want a reply
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// from.
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widgetEvent->mFlags.mWantReplyFromContentProcess = true;
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// If this event hadn't been marked as mNoCrossProcessBoundaryForwarding
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// yet, it means it wasn't processed by content. We'll not call any
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// of the handlers at this moment, and will wait for the event to be
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// redispatched with mNoCrossProcessBoundaryForwarding = 1 to process it.
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aEvent->StopPropagation();
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}
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}
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//
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// EventMatched
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//
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// See if the given handler cares about this particular key event
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//
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bool
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nsXBLWindowKeyHandler::EventMatched(
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nsXBLPrototypeHandler* aHandler,
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nsIAtom* aEventType,
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nsIDOMKeyEvent* aEvent,
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uint32_t aCharCode,
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const IgnoreModifierState& aIgnoreModifierState)
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{
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return aHandler->KeyEventMatched(aEventType, aEvent, aCharCode,
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aIgnoreModifierState);
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}
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bool
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nsXBLWindowKeyHandler::IsHTMLEditableFieldFocused()
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{
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nsIFocusManager* fm = nsFocusManager::GetFocusManager();
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if (!fm)
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return false;
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nsCOMPtr<nsIDOMWindow> focusedWindow;
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fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
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if (!focusedWindow)
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return false;
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nsCOMPtr<nsPIDOMWindow> piwin(do_QueryInterface(focusedWindow));
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nsIDocShell *docShell = piwin->GetDocShell();
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if (!docShell) {
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return false;
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}
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nsCOMPtr<nsIEditor> editor;
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docShell->GetEditor(getter_AddRefs(editor));
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nsCOMPtr<nsIHTMLEditor> htmlEditor = do_QueryInterface(editor);
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if (!htmlEditor) {
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return false;
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}
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nsCOMPtr<nsIDOMDocument> domDocument;
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editor->GetDocument(getter_AddRefs(domDocument));
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDocument);
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if (doc->HasFlag(NODE_IS_EDITABLE)) {
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// Don't need to perform any checks in designMode documents.
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return true;
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}
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nsCOMPtr<nsIDOMElement> focusedElement;
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fm->GetFocusedElement(getter_AddRefs(focusedElement));
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nsCOMPtr<nsINode> focusedNode = do_QueryInterface(focusedElement);
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if (focusedNode) {
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// If there is a focused element, make sure it's in the active editing host.
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// Note that GetActiveEditingHost finds the current editing host based on
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// the document's selection. Even though the document selection is usually
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// collapsed to where the focus is, but the page may modify the selection
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// without our knowledge, in which case this check will do something useful.
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nsCOMPtr<Element> activeEditingHost = htmlEditor->GetActiveEditingHost();
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if (!activeEditingHost) {
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return false;
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}
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return nsContentUtils::ContentIsDescendantOf(focusedNode, activeEditingHost);
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}
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return false;
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}
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//
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// WalkHandlersInternal and WalkHandlersAndExecute
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//
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// Given a particular DOM event and a pointer to the first handler in the list,
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// scan through the list to find something to handle the event. If aExecute = true,
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// the handler will be executed; otherwise just return an answer telling if a handler
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// for that event was found.
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//
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bool
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nsXBLWindowKeyHandler::WalkHandlersInternal(nsIDOMKeyEvent* aKeyEvent,
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nsIAtom* aEventType,
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nsXBLPrototypeHandler* aHandler,
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bool aExecute,
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bool* aOutReservedForChrome)
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{
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nsAutoTArray<nsShortcutCandidate, 10> accessKeys;
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nsContentUtils::GetAccelKeyCandidates(aKeyEvent, accessKeys);
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if (accessKeys.IsEmpty()) {
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return WalkHandlersAndExecute(aKeyEvent, aEventType, aHandler,
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0, IgnoreModifierState(),
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aExecute, aOutReservedForChrome);
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}
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for (uint32_t i = 0; i < accessKeys.Length(); ++i) {
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nsShortcutCandidate &key = accessKeys[i];
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IgnoreModifierState ignoreModifierState;
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ignoreModifierState.mShift = key.mIgnoreShift;
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if (WalkHandlersAndExecute(aKeyEvent, aEventType, aHandler,
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key.mCharCode, ignoreModifierState,
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aExecute, aOutReservedForChrome)) {
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return true;
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}
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}
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return false;
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}
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bool
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nsXBLWindowKeyHandler::WalkHandlersAndExecute(
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nsIDOMKeyEvent* aKeyEvent,
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nsIAtom* aEventType,
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nsXBLPrototypeHandler* aHandler,
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uint32_t aCharCode,
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const IgnoreModifierState& aIgnoreModifierState,
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bool aExecute,
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bool* aOutReservedForChrome)
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{
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nsresult rv;
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// Try all of the handlers until we find one that matches the event.
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for (nsXBLPrototypeHandler *currHandler = aHandler; currHandler;
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currHandler = currHandler->GetNextHandler()) {
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bool stopped = aKeyEvent->IsDispatchStopped();
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if (stopped) {
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// The event is finished, don't execute any more handlers
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return false;
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}
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if (!EventMatched(currHandler, aEventType, aKeyEvent,
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aCharCode, aIgnoreModifierState)) {
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continue; // try the next one
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}
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// Before executing this handler, check that it's not disabled,
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// and that it has something to do (oncommand of the <key> or its
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// <command> is non-empty).
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nsCOMPtr<nsIContent> elt = currHandler->GetHandlerElement();
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nsCOMPtr<Element> commandElt;
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// See if we're in a XUL doc.
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nsCOMPtr<Element> el = GetElement();
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if (el && elt) {
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// We are. Obtain our command attribute.
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nsAutoString command;
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elt->GetAttr(kNameSpaceID_None, nsGkAtoms::command, command);
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if (!command.IsEmpty()) {
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// Locate the command element in question. Note that we
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// know "elt" is in a doc if we're dealing with it here.
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NS_ASSERTION(elt->IsInDoc(), "elt must be in document");
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nsIDocument *doc = elt->GetCurrentDoc();
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if (doc)
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commandElt = do_QueryInterface(doc->GetElementById(command));
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if (!commandElt) {
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NS_ERROR("A XUL <key> is observing a command that doesn't exist. Unable to execute key binding!");
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continue;
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}
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}
|
|
}
|
|
|
|
if (!commandElt) {
|
|
commandElt = do_QueryInterface(elt);
|
|
}
|
|
|
|
if (commandElt) {
|
|
nsAutoString value;
|
|
commandElt->GetAttribute(NS_LITERAL_STRING("disabled"), value);
|
|
if (value.EqualsLiteral("true")) {
|
|
continue; // this handler is disabled, try the next one
|
|
}
|
|
|
|
// Check that there is an oncommand handler
|
|
commandElt->GetAttribute(NS_LITERAL_STRING("oncommand"), value);
|
|
if (value.IsEmpty()) {
|
|
continue; // nothing to do
|
|
}
|
|
|
|
if (aOutReservedForChrome) {
|
|
// The caller wants to know if this is a reserved command
|
|
commandElt->GetAttribute(NS_LITERAL_STRING("reserved"), value);
|
|
*aOutReservedForChrome = value.EqualsLiteral("true");
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<EventTarget> piTarget;
|
|
nsCOMPtr<Element> element = GetElement();
|
|
if (element) {
|
|
piTarget = commandElt;
|
|
} else {
|
|
piTarget = mTarget;
|
|
}
|
|
|
|
if (!aExecute) {
|
|
return true;
|
|
}
|
|
|
|
rv = currHandler->ExecuteHandler(piTarget, aKeyEvent);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return 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 (!aIgnoreModifierState.mOS) {
|
|
WidgetKeyboardEvent* keyEvent =
|
|
aKeyEvent->GetInternalNSEvent()->AsKeyboardEvent();
|
|
if (keyEvent && keyEvent->IsOS()) {
|
|
IgnoreModifierState ignoreModifierState(aIgnoreModifierState);
|
|
ignoreModifierState.mOS = true;
|
|
return WalkHandlersAndExecute(aKeyEvent, aEventType, aHandler, aCharCode,
|
|
ignoreModifierState, aExecute);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
nsXBLWindowKeyHandler::HasHandlerForEvent(nsIDOMKeyEvent* aEvent,
|
|
bool* aOutReservedForChrome)
|
|
{
|
|
if (!aEvent->InternalDOMEvent()->IsTrusted()) {
|
|
return false;
|
|
}
|
|
|
|
nsresult rv = EnsureHandlers();
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
bool isDisabled;
|
|
nsCOMPtr<Element> el = GetElement(&isDisabled);
|
|
if (el && isDisabled) {
|
|
return false;
|
|
}
|
|
|
|
nsAutoString eventType;
|
|
aEvent->GetType(eventType);
|
|
nsCOMPtr<nsIAtom> eventTypeAtom = do_GetAtom(eventType);
|
|
NS_ENSURE_TRUE(eventTypeAtom, false);
|
|
|
|
return WalkHandlersInternal(aEvent, eventTypeAtom, mHandler, false,
|
|
aOutReservedForChrome);
|
|
}
|
|
|
|
already_AddRefed<Element>
|
|
nsXBLWindowKeyHandler::GetElement(bool* aIsDisabled)
|
|
{
|
|
nsCOMPtr<Element> element = do_QueryReferent(mWeakPtrForElement);
|
|
if (element && aIsDisabled) {
|
|
*aIsDisabled = element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
|
|
nsGkAtoms::_true, eCaseMatters);
|
|
}
|
|
return element.forget();
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
already_AddRefed<nsXBLWindowKeyHandler>
|
|
NS_NewXBLWindowKeyHandler(nsIDOMElement* aElement, EventTarget* aTarget)
|
|
{
|
|
RefPtr<nsXBLWindowKeyHandler> result =
|
|
new nsXBLWindowKeyHandler(aElement, aTarget);
|
|
return result.forget();
|
|
}
|