mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
2377 lines
90 KiB
C++
2377 lines
90 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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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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/* A namespace class for static content utilities. */
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#ifndef nsContentUtils_h___
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#define nsContentUtils_h___
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#include <math.h>
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#if defined(XP_WIN) || defined(XP_OS2)
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#include <float.h>
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#endif
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#if defined(SOLARIS)
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#include <ieeefp.h>
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#endif
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#include "js/RootingAPI.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/AutoRestore.h"
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#include "mozilla/GuardObjects.h"
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#include "mozilla/TimeStamp.h"
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#include "nsAString.h"
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#include "nsCharSeparatedTokenizer.h"
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#include "nsContentListDeclarations.h"
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#include "nsMathUtils.h"
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#include "nsReadableUtils.h"
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#include "nsWrapperCache.h"
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class imgICache;
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class imgIContainer;
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class imgINotificationObserver;
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class imgIRequest;
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class imgLoader;
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class imgRequestProxy;
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class nsAutoScriptBlockerSuppressNodeRemoved;
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class nsDragEvent;
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class nsEvent;
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class nsEventListenerManager;
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class nsHtml5StringParser;
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class nsIChannel;
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class nsIConsoleService;
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class nsIContent;
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class nsIContentPolicy;
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class nsIDocShell;
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class nsIDocument;
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class nsIDocumentLoaderFactory;
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class nsIDocumentObserver;
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class nsIDOMDocument;
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class nsIDOMDocumentFragment;
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class nsIDOMEvent;
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class nsIDOMHTMLFormElement;
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class nsIDOMHTMLInputElement;
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class nsIDOMKeyEvent;
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class nsIDOMNode;
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class nsIDOMScriptObjectFactory;
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class nsIDOMWindow;
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class nsIDragSession;
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class nsIEditor;
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class nsIFragmentContentSink;
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class nsIImageLoadingContent;
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class nsIInterfaceRequestor;
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class nsIIOService;
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class nsIJSRuntimeService;
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class nsILineBreaker;
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class nsIMIMEHeaderParam;
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class nsINameSpaceManager;
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class nsINodeInfo;
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class nsIObserver;
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class nsIParser;
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class nsIParserService;
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class nsIPresShell;
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class nsIPrincipal;
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class nsIRunnable;
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class nsIScriptContext;
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class nsIScriptGlobalObject;
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class nsIScriptSecurityManager;
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class nsIStringBundle;
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class nsIStringBundleService;
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class nsISupportsHashKey;
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class nsIURI;
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class nsIWidget;
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class nsIWordBreaker;
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class nsIXPConnect;
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class nsIXPConnectJSObjectHolder;
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class nsKeyEvent;
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class nsNodeInfoManager;
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class nsPIDOMWindow;
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class nsPresContext;
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class nsScriptObjectTracer;
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class nsStringHashKey;
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class nsTextFragment;
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class nsViewportInfo;
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class nsIFrame;
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struct JSContext;
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struct JSPropertyDescriptor;
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struct JSRuntime;
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struct nsIntMargin;
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struct nsNativeKeyEvent; // Don't include nsINativeKeyBindings.h here: it will force strange compilation error!
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template<class E> class nsCOMArray;
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template<class E> class nsTArray;
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template<class K, class V> class nsDataHashtable;
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template<class K, class V> class nsRefPtrHashtable;
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namespace JS {
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class Value;
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} // namespace JS
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namespace mozilla {
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class ErrorResult;
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class Selection;
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namespace dom {
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class DocumentFragment;
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class Element;
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class EventTarget;
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} // namespace dom
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namespace layers {
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class LayerManager;
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} // namespace layers
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} // namespace mozilla
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#ifdef IBMBIDI
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class nsIBidiKeyboard;
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#endif
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extern const char kLoadAsData[];
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enum EventNameType {
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EventNameType_None = 0x0000,
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EventNameType_HTML = 0x0001,
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EventNameType_XUL = 0x0002,
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EventNameType_SVGGraphic = 0x0004, // svg graphic elements
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EventNameType_SVGSVG = 0x0008, // the svg element
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EventNameType_SMIL = 0x0010, // smil elements
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EventNameType_HTMLBodyOrFramesetOnly = 0x0020,
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EventNameType_HTMLXUL = 0x0003,
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EventNameType_All = 0xFFFF
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};
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struct EventNameMapping
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{
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nsIAtom* mAtom;
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uint32_t mId;
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int32_t mType;
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uint32_t mStructType;
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};
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struct nsShortcutCandidate {
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nsShortcutCandidate(uint32_t aCharCode, bool aIgnoreShift) :
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mCharCode(aCharCode), mIgnoreShift(aIgnoreShift)
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{
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}
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uint32_t mCharCode;
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bool mIgnoreShift;
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};
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class nsContentUtils
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{
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friend class nsAutoScriptBlockerSuppressNodeRemoved;
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typedef mozilla::dom::Element Element;
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typedef mozilla::TimeDuration TimeDuration;
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public:
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static nsresult Init();
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/**
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* Get a JSContext from the document's scope object.
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*/
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static JSContext* GetContextFromDocument(nsIDocument *aDocument);
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static bool IsCallerChrome();
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static bool IsCallerXBL();
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static bool IsImageSrcSetDisabled();
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static bool LookupBindingMember(JSContext* aCx, nsIContent *aContent,
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JS::HandleId aId, JSPropertyDescriptor* aDesc);
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/**
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* Returns the parent node of aChild crossing document boundaries.
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*/
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static nsINode* GetCrossDocParentNode(nsINode* aChild);
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/**
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* Do not ever pass null pointers to this method. If one of your
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* nsIContents is null, you have to decide for yourself what
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* "IsDescendantOf" really means.
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*
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* @param aPossibleDescendant node to test for being a descendant of
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* aPossibleAncestor
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* @param aPossibleAncestor node to test for being an ancestor of
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* aPossibleDescendant
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* @return true if aPossibleDescendant is a descendant of
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* aPossibleAncestor (or is aPossibleAncestor). false
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* otherwise.
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*/
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static bool ContentIsDescendantOf(const nsINode* aPossibleDescendant,
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const nsINode* aPossibleAncestor);
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/**
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* Similar to ContentIsDescendantOf, except will treat an HTMLTemplateElement
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* or ShadowRoot as an ancestor of things in the corresponding DocumentFragment.
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* See the concept of "host-including inclusive ancestor" in the DOM
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* specification.
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*/
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static bool ContentIsHostIncludingDescendantOf(
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const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor);
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/**
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* Similar to ContentIsDescendantOf except it crosses document boundaries.
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*/
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static bool ContentIsCrossDocDescendantOf(nsINode* aPossibleDescendant,
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nsINode* aPossibleAncestor);
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/*
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* This method fills the |aArray| with all ancestor nodes of |aNode|
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* including |aNode| at the zero index.
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*/
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static nsresult GetAncestors(nsINode* aNode,
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nsTArray<nsINode*>& aArray);
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/*
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* This method fills |aAncestorNodes| with all ancestor nodes of |aNode|
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* including |aNode| (QI'd to nsIContent) at the zero index.
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* For each ancestor, there is a corresponding element in |aAncestorOffsets|
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* which is the IndexOf the child in relation to its parent.
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*
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* This method just sucks.
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*/
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static nsresult GetAncestorsAndOffsets(nsIDOMNode* aNode,
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int32_t aOffset,
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nsTArray<nsIContent*>* aAncestorNodes,
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nsTArray<int32_t>* aAncestorOffsets);
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/*
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* The out parameter, |aCommonAncestor| will be the closest node, if any,
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* to both |aNode| and |aOther| which is also an ancestor of each.
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* Returns an error if the two nodes are disconnected and don't have
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* a common ancestor.
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*/
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static nsresult GetCommonAncestor(nsIDOMNode *aNode,
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nsIDOMNode *aOther,
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nsIDOMNode** aCommonAncestor);
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/**
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* Returns the common ancestor, if any, for two nodes. Returns null if the
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* nodes are disconnected.
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*/
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static nsINode* GetCommonAncestor(nsINode* aNode1,
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nsINode* aNode2);
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/**
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* Returns true if aNode1 is before aNode2 in the same connected
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* tree.
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*/
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static bool PositionIsBefore(nsINode* aNode1, nsINode* aNode2);
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/**
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* Utility routine to compare two "points", where a point is a
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* node/offset pair
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* Returns -1 if point1 < point2, 1, if point1 > point2,
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* 0 if error or if point1 == point2.
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* NOTE! If the two nodes aren't in the same connected subtree,
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* the result is 1, and the optional aDisconnected parameter
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* is set to true.
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*/
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static int32_t ComparePoints(nsINode* aParent1, int32_t aOffset1,
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nsINode* aParent2, int32_t aOffset2,
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bool* aDisconnected = nullptr);
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static int32_t ComparePoints(nsIDOMNode* aParent1, int32_t aOffset1,
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nsIDOMNode* aParent2, int32_t aOffset2,
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bool* aDisconnected = nullptr);
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/**
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* Brute-force search of the element subtree rooted at aContent for
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* an element with the given id. aId must be nonempty, otherwise
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* this method may return nodes even if they have no id!
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*/
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static Element* MatchElementId(nsIContent *aContent, const nsAString& aId);
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/**
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* Similar to above, but to be used if one already has an atom for the ID
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*/
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static Element* MatchElementId(nsIContent *aContent, const nsIAtom* aId);
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/**
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* Reverses the document position flags passed in.
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*
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* @param aDocumentPosition The document position flags to be reversed.
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*
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* @return The reversed document position flags.
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*
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* @see nsIDOMNode
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*/
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static uint16_t ReverseDocumentPosition(uint16_t aDocumentPosition);
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static uint32_t CopyNewlineNormalizedUnicodeTo(const nsAString& aSource,
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uint32_t aSrcOffset,
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PRUnichar* aDest,
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uint32_t aLength,
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bool& aLastCharCR);
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static uint32_t CopyNewlineNormalizedUnicodeTo(nsReadingIterator<PRUnichar>& aSrcStart, const nsReadingIterator<PRUnichar>& aSrcEnd, nsAString& aDest);
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static const nsDependentSubstring TrimCharsInSet(const char* aSet,
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const nsAString& aValue);
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template<bool IsWhitespace(PRUnichar)>
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static const nsDependentSubstring TrimWhitespace(const nsAString& aStr,
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bool aTrimTrailing = true);
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/**
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* Returns true if aChar is of class Ps, Pi, Po, Pf, or Pe.
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*/
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static bool IsFirstLetterPunctuation(uint32_t aChar);
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static bool IsFirstLetterPunctuationAt(const nsTextFragment* aFrag, uint32_t aOffset);
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/**
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* Returns true if aChar is of class Lu, Ll, Lt, Lm, Lo, Nd, Nl or No
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*/
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static bool IsAlphanumeric(uint32_t aChar);
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static bool IsAlphanumericAt(const nsTextFragment* aFrag, uint32_t aOffset);
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/*
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* Is the character an HTML whitespace character?
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*
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* We define whitespace using the list in HTML5 and css3-selectors:
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* U+0009, U+000A, U+000C, U+000D, U+0020
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*
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* HTML 4.01 also lists U+200B (zero-width space).
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*/
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static bool IsHTMLWhitespace(PRUnichar aChar);
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/*
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* Returns whether the character is an HTML whitespace (see IsHTMLWhitespace)
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* or a nbsp character (U+00A0).
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*/
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static bool IsHTMLWhitespaceOrNBSP(PRUnichar aChar);
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/**
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* Is the HTML local name a block element?
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*/
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static bool IsHTMLBlock(nsIAtom* aLocalName);
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/**
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* Is the HTML local name a void element?
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*/
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static bool IsHTMLVoid(nsIAtom* aLocalName);
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/**
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* Parse a margin string of format 'top, right, bottom, left' into
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* an nsIntMargin.
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*
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* @param aString the string to parse
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* @param aResult the resulting integer
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* @return whether the value could be parsed
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*/
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static bool ParseIntMarginValue(const nsAString& aString, nsIntMargin& aResult);
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/**
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* Parse the value of the <font size=""> attribute according to the HTML5
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* spec as of April 16, 2012.
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*
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* @param aValue the value to parse
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* @return 1 to 7, or 0 if the value couldn't be parsed
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*/
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static int32_t ParseLegacyFontSize(const nsAString& aValue);
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static void Shutdown();
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/**
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* Checks whether two nodes come from the same origin.
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*/
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static nsresult CheckSameOrigin(const nsINode* aTrustedNode,
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nsIDOMNode* aUnTrustedNode);
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static nsresult CheckSameOrigin(const nsINode* aTrustedNode,
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const nsINode* unTrustedNode);
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// Check if the (JS) caller can access aNode.
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static bool CanCallerAccess(nsIDOMNode *aNode);
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static bool CanCallerAccess(nsINode* aNode);
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// Check if the (JS) caller can access aWindow.
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// aWindow can be either outer or inner window.
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static bool CanCallerAccess(nsPIDOMWindow* aWindow);
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/**
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* Get the window through the JS context that's currently on the stack.
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* If there's no JS context currently on the stack, returns null.
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*/
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static nsPIDOMWindow *GetWindowFromCaller();
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/**
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* The two GetDocumentFrom* functions below allow a caller to get at a
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* document that is relevant to the currently executing script.
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*
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* GetDocumentFromCaller gets its document by looking at the last called
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* function and finding the document that the function itself relates to.
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* For example, consider two windows A and B in the same origin. B has a
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* function which does something that ends up needing the current document.
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* If a script in window A were to call B's function, GetDocumentFromCaller
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* would find that function (in B) and return B's document.
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*
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* GetDocumentFromContext gets its document by looking at the currently
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* executing context's global object and returning its document. Thus,
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* given the example above, GetDocumentFromCaller would see that the
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* currently executing script was in window A, and return A's document.
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*/
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/**
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* Get the document from the currently executing function. This will return
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* the document that the currently executing function is in/from.
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*
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* @return The document or null if no JS Context.
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*/
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static nsIDocument* GetDocumentFromCaller();
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/**
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* Get the document through the JS context that's currently on the stack.
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* If there's no JS context currently on the stack it will return null.
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* This will return the document of the calling script.
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*
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* @return The document or null if no JS context
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*/
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static nsIDocument* GetDocumentFromContext();
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// Check if a node is in the document prolog, i.e. before the document
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// element.
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static bool InProlog(nsINode *aNode);
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static nsIParserService* GetParserService();
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static nsINameSpaceManager* NameSpaceManager()
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{
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return sNameSpaceManager;
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}
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static nsIIOService* GetIOService()
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{
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return sIOService;
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}
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#ifdef IBMBIDI
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static nsIBidiKeyboard* GetBidiKeyboard();
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#endif
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/**
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* Get the cache security manager service. Can return null if the layout
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* module has been shut down.
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*/
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static nsIScriptSecurityManager* GetSecurityManager()
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{
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return sSecurityManager;
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}
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// Returns the subject principal. Guaranteed to return non-null. May only
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// be called when nsContentUtils is initialized.
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static nsIPrincipal* GetSubjectPrincipal();
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// Returns the principal of the given JS object. This should never be null
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// for any object in the XPConnect runtime.
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//
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// In general, being interested in the principal of an object is enough to
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// guarantee that the return value is non-null.
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static nsIPrincipal* GetObjectPrincipal(JSObject* aObj);
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static nsresult GenerateStateKey(nsIContent* aContent,
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const nsIDocument* aDocument,
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nsACString& aKey);
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|
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/**
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* Create a new nsIURI from aSpec, using aBaseURI as the base. The
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* origin charset of the new nsIURI will be the document charset of
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* aDocument.
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*/
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static nsresult NewURIWithDocumentCharset(nsIURI** aResult,
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const nsAString& aSpec,
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nsIDocument* aDocument,
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nsIURI* aBaseURI);
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|
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/**
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* Convert aInput (in charset aCharset) to UTF16 in aOutput.
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*
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* @param aCharset the name of the charset; if empty, we assume UTF8
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*/
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static nsresult ConvertStringFromCharset(const nsACString& aCharset,
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const nsACString& aInput,
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nsAString& aOutput);
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|
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/**
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* Determine whether a buffer begins with a BOM for UTF-8, UTF-16LE,
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* UTF-16BE
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*
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* @param aBuffer the buffer to check
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* @param aLength the length of the buffer
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* @param aCharset empty if not found
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* @return boolean indicating whether a BOM was detected.
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*/
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static bool CheckForBOM(const unsigned char* aBuffer, uint32_t aLength,
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nsACString& aCharset);
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static nsresult GuessCharset(const char *aData, uint32_t aDataLen,
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nsACString &aCharset);
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/**
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* Determine whether aContent is in some way associated with aForm. If the
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* form is a container the only elements that are considered to be associated
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* with a form are the elements that are contained within the form. If the
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* form is a leaf element then all elements will be accepted into this list,
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* since this can happen due to content fixup when a form spans table rows or
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* table cells.
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*/
|
|
static bool BelongsInForm(nsIContent *aForm,
|
|
nsIContent *aContent);
|
|
|
|
static nsresult CheckQName(const nsAString& aQualifiedName,
|
|
bool aNamespaceAware = true,
|
|
const PRUnichar** aColon = nullptr);
|
|
|
|
static nsresult SplitQName(const nsIContent* aNamespaceResolver,
|
|
const nsAFlatString& aQName,
|
|
int32_t *aNamespace, nsIAtom **aLocalName);
|
|
|
|
static nsresult GetNodeInfoFromQName(const nsAString& aNamespaceURI,
|
|
const nsAString& aQualifiedName,
|
|
nsNodeInfoManager* aNodeInfoManager,
|
|
uint16_t aNodeType,
|
|
nsINodeInfo** aNodeInfo);
|
|
|
|
static void SplitExpatName(const PRUnichar *aExpatName, nsIAtom **aPrefix,
|
|
nsIAtom **aTagName, int32_t *aNameSpaceID);
|
|
|
|
// Get a permission-manager setting for the given principal and type.
|
|
// If the pref doesn't exist or if it isn't ALLOW_ACTION, false is
|
|
// returned, otherwise true is returned. Always returns true for the
|
|
// system principal, and false for a null principal.
|
|
static bool IsSitePermAllow(nsIPrincipal* aPrincipal, const char* aType);
|
|
|
|
// Get a permission-manager setting for the given principal and type.
|
|
// If the pref doesn't exist or if it isn't DENY_ACTION, false is
|
|
// returned, otherwise true is returned. Always returns false for the
|
|
// system principal, and true for a null principal.
|
|
static bool IsSitePermDeny(nsIPrincipal* aPrincipal, const char* aType);
|
|
|
|
// Get a permission-manager setting for the given principal and type.
|
|
// If the pref doesn't exist or if it isn't ALLOW_ACTION, false is
|
|
// returned, otherwise true is returned. Always returns true for the
|
|
// system principal, and false for a null principal.
|
|
// This version checks the permission for an exact host match on
|
|
// the principal
|
|
static bool IsExactSitePermAllow(nsIPrincipal* aPrincipal, const char* aType);
|
|
|
|
// Get a permission-manager setting for the given principal and type.
|
|
// If the pref doesn't exist or if it isn't DENY_ACTION, false is
|
|
// returned, otherwise true is returned. Always returns false for the
|
|
// system principal, and true for a null principal.
|
|
// This version checks the permission for an exact host match on
|
|
// the principal
|
|
static bool IsExactSitePermDeny(nsIPrincipal* aPrincipal, const char* aType);
|
|
|
|
// Returns true if aDoc1 and aDoc2 have equal NodePrincipal()s.
|
|
static bool HaveEqualPrincipals(nsIDocument* aDoc1, nsIDocument* aDoc2);
|
|
|
|
static nsILineBreaker* LineBreaker()
|
|
{
|
|
return sLineBreaker;
|
|
}
|
|
|
|
static nsIWordBreaker* WordBreaker()
|
|
{
|
|
return sWordBreaker;
|
|
}
|
|
|
|
/**
|
|
* Regster aObserver as a shutdown observer. A strong reference is held
|
|
* to aObserver until UnregisterShutdownObserver is called.
|
|
*/
|
|
static void RegisterShutdownObserver(nsIObserver* aObserver);
|
|
static void UnregisterShutdownObserver(nsIObserver* aObserver);
|
|
|
|
/**
|
|
* @return true if aContent has an attribute aName in namespace aNameSpaceID,
|
|
* and the attribute value is non-empty.
|
|
*/
|
|
static bool HasNonEmptyAttr(const nsIContent* aContent, int32_t aNameSpaceID,
|
|
nsIAtom* aName);
|
|
|
|
/**
|
|
* Method that gets the primary presContext for the node.
|
|
*
|
|
* @param aContent The content node.
|
|
* @return the presContext, or nullptr if the content is not in a document
|
|
* (if GetCurrentDoc returns nullptr)
|
|
*/
|
|
static nsPresContext* GetContextForContent(const nsIContent* aContent);
|
|
|
|
/**
|
|
* Method to do security and content policy checks on the image URI
|
|
*
|
|
* @param aURI uri of the image to be loaded
|
|
* @param aContext the context the image is loaded in (eg an element)
|
|
* @param aLoadingDocument the document we belong to
|
|
* @param aLoadingPrincipal the principal doing the load
|
|
* @param aImageBlockingStatus the nsIContentPolicy blocking status for this
|
|
* image. This will be set even if a security check fails for the
|
|
* image, to some reasonable REJECT_* value. This out param will only
|
|
* be set if it's non-null.
|
|
* @return true if the load can proceed, or false if it is blocked.
|
|
* Note that aImageBlockingStatus, if set will always be an ACCEPT
|
|
* status if true is returned and always be a REJECT_* status if
|
|
* false is returned.
|
|
*/
|
|
static bool CanLoadImage(nsIURI* aURI,
|
|
nsISupports* aContext,
|
|
nsIDocument* aLoadingDocument,
|
|
nsIPrincipal* aLoadingPrincipal,
|
|
int16_t* aImageBlockingStatus = nullptr);
|
|
/**
|
|
* Method to start an image load. This does not do any security checks.
|
|
* This method will attempt to make aURI immutable; a caller that wants to
|
|
* keep a mutable version around should pass in a clone.
|
|
*
|
|
* @param aURI uri of the image to be loaded
|
|
* @param aLoadingDocument the document we belong to
|
|
* @param aLoadingPrincipal the principal doing the load
|
|
* @param aReferrer the referrer URI
|
|
* @param aObserver the observer for the image load
|
|
* @param aLoadFlags the load flags to use. See nsIRequest
|
|
* @return the imgIRequest for the image load
|
|
*/
|
|
static nsresult LoadImage(nsIURI* aURI,
|
|
nsIDocument* aLoadingDocument,
|
|
nsIPrincipal* aLoadingPrincipal,
|
|
nsIURI* aReferrer,
|
|
imgINotificationObserver* aObserver,
|
|
int32_t aLoadFlags,
|
|
imgRequestProxy** aRequest);
|
|
|
|
/**
|
|
* Obtain an image loader that respects the given document/channel's privacy status.
|
|
* Null document/channel arguments return the public image loader.
|
|
*/
|
|
static imgLoader* GetImgLoaderForDocument(nsIDocument* aDoc);
|
|
static imgLoader* GetImgLoaderForChannel(nsIChannel* aChannel);
|
|
|
|
/**
|
|
* Returns whether the given URI is in the image cache.
|
|
*/
|
|
static bool IsImageInCache(nsIURI* aURI, nsIDocument* aDocument);
|
|
|
|
/**
|
|
* Method to get an imgIContainer from an image loading content
|
|
*
|
|
* @param aContent The image loading content. Must not be null.
|
|
* @param aRequest The image request [out]
|
|
* @return the imgIContainer corresponding to the first frame of the image
|
|
*/
|
|
static already_AddRefed<imgIContainer> GetImageFromContent(nsIImageLoadingContent* aContent, imgIRequest **aRequest = nullptr);
|
|
|
|
/**
|
|
* Helper method to call imgIRequest::GetStaticRequest.
|
|
*/
|
|
static already_AddRefed<imgRequestProxy> GetStaticRequest(imgRequestProxy* aRequest);
|
|
|
|
/**
|
|
* Method that decides whether a content node is draggable
|
|
*
|
|
* @param aContent The content node to test.
|
|
* @return whether it's draggable
|
|
*/
|
|
static bool ContentIsDraggable(nsIContent* aContent);
|
|
|
|
/**
|
|
* Method that decides whether a content node is a draggable image
|
|
*
|
|
* @param aContent The content node to test.
|
|
* @return whether it's a draggable image
|
|
*/
|
|
static bool IsDraggableImage(nsIContent* aContent);
|
|
|
|
/**
|
|
* Method that decides whether a content node is a draggable link
|
|
*
|
|
* @param aContent The content node to test.
|
|
* @return whether it's a draggable link
|
|
*/
|
|
static bool IsDraggableLink(const nsIContent* aContent);
|
|
|
|
/**
|
|
* Convenience method to create a new nodeinfo that differs only by name
|
|
* from aNodeInfo.
|
|
*/
|
|
static nsresult NameChanged(nsINodeInfo* aNodeInfo, nsIAtom* aName,
|
|
nsINodeInfo** aResult);
|
|
|
|
/**
|
|
* Returns the appropriate event argument names for the specified
|
|
* namespace and event name. Added because we need to switch between
|
|
* SVG's "evt" and the rest of the world's "event", and because onerror
|
|
* takes 3 args.
|
|
*/
|
|
static void GetEventArgNames(int32_t aNameSpaceID, nsIAtom *aEventName,
|
|
uint32_t *aArgCount, const char*** aArgNames);
|
|
|
|
/**
|
|
* If aNode is not an element, return true exactly when aContent's binding
|
|
* parent is null.
|
|
*
|
|
* If aNode is an element, return true exactly when aContent's binding parent
|
|
* is the same as aNode's.
|
|
*
|
|
* This method is particularly useful for callers who are trying to ensure
|
|
* that they are working with a non-anonymous descendant of a given node. If
|
|
* aContent is a descendant of aNode, a return value of false from this
|
|
* method means that it's an anonymous descendant from aNode's point of view.
|
|
*
|
|
* Both arguments to this method must be non-null.
|
|
*/
|
|
static bool IsInSameAnonymousTree(const nsINode* aNode, const nsIContent* aContent);
|
|
|
|
/**
|
|
* Return the nsIXPConnect service.
|
|
*/
|
|
static nsIXPConnect *XPConnect()
|
|
{
|
|
return sXPConnect;
|
|
}
|
|
|
|
/**
|
|
* Report a non-localized error message to the error console.
|
|
* @param aErrorText the error message
|
|
* @param aErrorFlags See nsIScriptError.
|
|
* @param aCategory Name of module reporting error.
|
|
* @param aDocument Reference to the document which triggered the message.
|
|
* @param [aURI=nullptr] (Optional) URI of resource containing error.
|
|
* @param [aSourceLine=EmptyString()] (Optional) The text of the line that
|
|
contains the error (may be empty).
|
|
* @param [aLineNumber=0] (Optional) Line number within resource
|
|
containing error.
|
|
* @param [aColumnNumber=0] (Optional) Column number within resource
|
|
containing error.
|
|
If aURI is null, then aDocument->GetDocumentURI() is used.
|
|
*/
|
|
static nsresult ReportToConsoleNonLocalized(const nsAString& aErrorText,
|
|
uint32_t aErrorFlags,
|
|
const char *aCategory,
|
|
nsIDocument* aDocument,
|
|
nsIURI* aURI = nullptr,
|
|
const nsAFlatString& aSourceLine
|
|
= EmptyString(),
|
|
uint32_t aLineNumber = 0,
|
|
uint32_t aColumnNumber = 0);
|
|
|
|
/**
|
|
* Report a localized error message to the error console.
|
|
* @param aErrorFlags See nsIScriptError.
|
|
* @param aCategory Name of module reporting error.
|
|
* @param aDocument Reference to the document which triggered the message.
|
|
* @param aFile Properties file containing localized message.
|
|
* @param aMessageName Name of localized message.
|
|
* @param [aParams=nullptr] (Optional) Parameters to be substituted into
|
|
localized message.
|
|
* @param [aParamsLength=0] (Optional) Length of aParams.
|
|
* @param [aURI=nullptr] (Optional) URI of resource containing error.
|
|
* @param [aSourceLine=EmptyString()] (Optional) The text of the line that
|
|
contains the error (may be empty).
|
|
* @param [aLineNumber=0] (Optional) Line number within resource
|
|
containing error.
|
|
* @param [aColumnNumber=0] (Optional) Column number within resource
|
|
containing error.
|
|
If aURI is null, then aDocument->GetDocumentURI() is used.
|
|
*/
|
|
enum PropertiesFile {
|
|
eCSS_PROPERTIES,
|
|
eXBL_PROPERTIES,
|
|
eXUL_PROPERTIES,
|
|
eLAYOUT_PROPERTIES,
|
|
eFORMS_PROPERTIES,
|
|
ePRINTING_PROPERTIES,
|
|
eDOM_PROPERTIES,
|
|
eHTMLPARSER_PROPERTIES,
|
|
eSVG_PROPERTIES,
|
|
eBRAND_PROPERTIES,
|
|
eCOMMON_DIALOG_PROPERTIES,
|
|
eMATHML_PROPERTIES,
|
|
eSECURITY_PROPERTIES,
|
|
PropertiesFile_COUNT
|
|
};
|
|
static nsresult ReportToConsole(uint32_t aErrorFlags,
|
|
const char *aCategory,
|
|
nsIDocument* aDocument,
|
|
PropertiesFile aFile,
|
|
const char *aMessageName,
|
|
const PRUnichar **aParams = nullptr,
|
|
uint32_t aParamsLength = 0,
|
|
nsIURI* aURI = nullptr,
|
|
const nsAFlatString& aSourceLine
|
|
= EmptyString(),
|
|
uint32_t aLineNumber = 0,
|
|
uint32_t aColumnNumber = 0);
|
|
|
|
/**
|
|
* Get the localized string named |aKey| in properties file |aFile|.
|
|
*/
|
|
static nsresult GetLocalizedString(PropertiesFile aFile,
|
|
const char* aKey,
|
|
nsXPIDLString& aResult);
|
|
|
|
/**
|
|
* A helper function that parses a sandbox attribute (of an <iframe> or
|
|
* a CSP directive) and converts it to the set of flags used internally.
|
|
*
|
|
* @param aAttribute the value of the sandbox attribute
|
|
* @return the set of flags
|
|
*/
|
|
static uint32_t ParseSandboxAttributeToFlags(const nsAString& aSandboxAttr);
|
|
|
|
|
|
/**
|
|
* Fill (with the parameters given) the localized string named |aKey| in
|
|
* properties file |aFile|.
|
|
*/
|
|
private:
|
|
static nsresult FormatLocalizedString(PropertiesFile aFile,
|
|
const char* aKey,
|
|
const PRUnichar** aParams,
|
|
uint32_t aParamsLength,
|
|
nsXPIDLString& aResult);
|
|
|
|
public:
|
|
template<uint32_t N>
|
|
static nsresult FormatLocalizedString(PropertiesFile aFile,
|
|
const char* aKey,
|
|
const PRUnichar* (&aParams)[N],
|
|
nsXPIDLString& aResult)
|
|
{
|
|
return FormatLocalizedString(aFile, aKey, aParams, N, aResult);
|
|
}
|
|
|
|
/**
|
|
* Returns true if aDocument is a chrome document
|
|
*/
|
|
static bool IsChromeDoc(nsIDocument *aDocument);
|
|
|
|
/**
|
|
* Returns true if aDocument is in a docshell whose parent is the same type
|
|
*/
|
|
static bool IsChildOfSameType(nsIDocument* aDoc);
|
|
|
|
/**
|
|
'* Returns true if the content-type will be rendered as plain-text.
|
|
*/
|
|
static bool IsPlainTextType(const nsACString& aContentType);
|
|
|
|
/**
|
|
* Get the script file name to use when compiling the script
|
|
* referenced by aURI. In cases where there's no need for any extra
|
|
* security wrapper automation the script file name that's returned
|
|
* will be the spec in aURI, else it will be the spec in aDocument's
|
|
* URI followed by aURI's spec, separated by " -> ". Returns true
|
|
* if the script file name was modified, false if it's aURI's
|
|
* spec.
|
|
*/
|
|
static bool GetWrapperSafeScriptFilename(nsIDocument *aDocument,
|
|
nsIURI *aURI,
|
|
nsACString& aScriptURI);
|
|
|
|
|
|
/**
|
|
* Returns true if aDocument belongs to a chrome docshell for
|
|
* display purposes. Returns false for null documents or documents
|
|
* which do not belong to a docshell.
|
|
*/
|
|
static bool IsInChromeDocshell(nsIDocument *aDocument);
|
|
|
|
/**
|
|
* Return the content policy service
|
|
*/
|
|
static nsIContentPolicy *GetContentPolicy();
|
|
|
|
/**
|
|
* Quick helper to determine whether there are any mutation listeners
|
|
* of a given type that apply to this content or any of its ancestors.
|
|
* The method has the side effect to call document's MayDispatchMutationEvent
|
|
* using aTargetForSubtreeModified as the parameter.
|
|
*
|
|
* @param aNode The node to search for listeners
|
|
* @param aType The type of listener (NS_EVENT_BITS_MUTATION_*)
|
|
* @param aTargetForSubtreeModified The node which is the target of the
|
|
* possible DOMSubtreeModified event.
|
|
*
|
|
* @return true if there are mutation listeners of the specified type
|
|
*/
|
|
static bool HasMutationListeners(nsINode* aNode,
|
|
uint32_t aType,
|
|
nsINode* aTargetForSubtreeModified);
|
|
|
|
/**
|
|
* Quick helper to determine whether there are any mutation listeners
|
|
* of a given type that apply to any content in this document. It is valid
|
|
* to pass null for aDocument here, in which case this function always
|
|
* returns true.
|
|
*
|
|
* @param aDocument The document to search for listeners
|
|
* @param aType The type of listener (NS_EVENT_BITS_MUTATION_*)
|
|
*
|
|
* @return true if there are mutation listeners of the specified type
|
|
*/
|
|
static bool HasMutationListeners(nsIDocument* aDocument,
|
|
uint32_t aType);
|
|
/**
|
|
* Synchronously fire DOMNodeRemoved on aChild. Only fires the event if
|
|
* there really are listeners by checking using the HasMutationListeners
|
|
* function above. The function makes sure to hold the relevant objects alive
|
|
* for the duration of the event firing. However there are no guarantees
|
|
* that any of the objects are alive by the time the function returns.
|
|
* If you depend on that you need to hold references yourself.
|
|
*
|
|
* @param aChild The node to fire DOMNodeRemoved at.
|
|
* @param aParent The parent of aChild.
|
|
* @param aOwnerDoc The ownerDocument of aChild.
|
|
*/
|
|
static void MaybeFireNodeRemoved(nsINode* aChild, nsINode* aParent,
|
|
nsIDocument* aOwnerDoc);
|
|
|
|
/**
|
|
* This method creates and dispatches a trusted event.
|
|
* Works only with events which can be created by calling
|
|
* nsIDOMDocument::CreateEvent() with parameter "Events".
|
|
* @param aDoc The document which will be used to create the event.
|
|
* @param aTarget The target of the event, should be QIable to
|
|
* nsIDOMEventTarget.
|
|
* @param aEventName The name of the event.
|
|
* @param aCanBubble Whether the event can bubble.
|
|
* @param aCancelable Is the event cancelable.
|
|
* @param aDefaultAction Set to true if default action should be taken,
|
|
* see nsIDOMEventTarget::DispatchEvent.
|
|
*/
|
|
static nsresult DispatchTrustedEvent(nsIDocument* aDoc,
|
|
nsISupports* aTarget,
|
|
const nsAString& aEventName,
|
|
bool aCanBubble,
|
|
bool aCancelable,
|
|
bool *aDefaultAction = nullptr);
|
|
|
|
/**
|
|
* This method creates and dispatches a untrusted event.
|
|
* Works only with events which can be created by calling
|
|
* nsIDOMDocument::CreateEvent() with parameter "Events".
|
|
* @param aDoc The document which will be used to create the event.
|
|
* @param aTarget The target of the event, should be QIable to
|
|
* nsIDOMEventTarget.
|
|
* @param aEventName The name of the event.
|
|
* @param aCanBubble Whether the event can bubble.
|
|
* @param aCancelable Is the event cancelable.
|
|
* @param aDefaultAction Set to true if default action should be taken,
|
|
* see nsIDOMEventTarget::DispatchEvent.
|
|
*/
|
|
static nsresult DispatchUntrustedEvent(nsIDocument* aDoc,
|
|
nsISupports* aTarget,
|
|
const nsAString& aEventName,
|
|
bool aCanBubble,
|
|
bool aCancelable,
|
|
bool *aDefaultAction = nullptr);
|
|
|
|
/**
|
|
* This method creates and dispatches a trusted event to the chrome
|
|
* event handler.
|
|
* Works only with events which can be created by calling
|
|
* nsIDOMDocument::CreateEvent() with parameter "Events".
|
|
* @param aDocument The document which will be used to create the event,
|
|
* and whose window's chrome handler will be used to
|
|
* dispatch the event.
|
|
* @param aTarget The target of the event, used for event->SetTarget()
|
|
* @param aEventName The name of the event.
|
|
* @param aCanBubble Whether the event can bubble.
|
|
* @param aCancelable Is the event cancelable.
|
|
* @param aDefaultAction Set to true if default action should be taken,
|
|
* see nsIDOMEventTarget::DispatchEvent.
|
|
*/
|
|
static nsresult DispatchChromeEvent(nsIDocument* aDoc,
|
|
nsISupports* aTarget,
|
|
const nsAString& aEventName,
|
|
bool aCanBubble,
|
|
bool aCancelable,
|
|
bool *aDefaultAction = nullptr);
|
|
|
|
/**
|
|
* Determines if an event attribute name (such as onclick) is valid for
|
|
* a given element type. Types are from the EventNameType enumeration
|
|
* defined above.
|
|
*
|
|
* @param aName the event name to look up
|
|
* @param aType the type of content
|
|
*/
|
|
static bool IsEventAttributeName(nsIAtom* aName, int32_t aType);
|
|
|
|
/**
|
|
* Return the event id for the event with the given name. The name is the
|
|
* event name with the 'on' prefix. Returns NS_USER_DEFINED_EVENT if the
|
|
* event doesn't match a known event name.
|
|
*
|
|
* @param aName the event name to look up
|
|
*/
|
|
static uint32_t GetEventId(nsIAtom* aName);
|
|
|
|
/**
|
|
* Return the category for the event with the given name. The name is the
|
|
* event name *without* the 'on' prefix. Returns NS_EVENT if the event
|
|
* is not known to be in any particular category.
|
|
*
|
|
* @param aName the event name to look up
|
|
*/
|
|
static uint32_t GetEventCategory(const nsAString& aName);
|
|
|
|
/**
|
|
* Return the event id and atom for the event with the given name.
|
|
* The name is the event name *without* the 'on' prefix.
|
|
* Returns NS_USER_DEFINED_EVENT on the aEventID if the
|
|
* event doesn't match a known event name in the category.
|
|
*
|
|
* @param aName the event name to look up
|
|
* @param aEventStruct only return event id in aEventStruct category
|
|
*/
|
|
static nsIAtom* GetEventIdAndAtom(const nsAString& aName,
|
|
uint32_t aEventStruct,
|
|
uint32_t* aEventID);
|
|
|
|
/**
|
|
* Used only during traversal of the XPCOM graph by the cycle
|
|
* collector: push a pointer to the listener manager onto the
|
|
* children deque, if it exists. Do nothing if there is no listener
|
|
* manager.
|
|
*
|
|
* Crucially: does not perform any refcounting operations.
|
|
*
|
|
* @param aNode The node to traverse.
|
|
* @param children The buffer to push a listener manager pointer into.
|
|
*/
|
|
static void TraverseListenerManager(nsINode *aNode,
|
|
nsCycleCollectionTraversalCallback &cb);
|
|
|
|
/**
|
|
* Get the eventlistener manager for aNode. If a new eventlistener manager
|
|
* was created, aCreated is set to true.
|
|
*
|
|
* @param aNode The node for which to get the eventlistener manager.
|
|
* @param aCreateIfNotFound If false, returns a listener manager only if
|
|
* one already exists.
|
|
*/
|
|
static nsEventListenerManager* GetListenerManager(nsINode* aNode,
|
|
bool aCreateIfNotFound);
|
|
|
|
static void UnmarkGrayJSListenersInCCGenerationDocuments(uint32_t aGeneration);
|
|
|
|
/**
|
|
* Remove the eventlistener manager for aNode.
|
|
*
|
|
* @param aNode The node for which to remove the eventlistener manager.
|
|
*/
|
|
static void RemoveListenerManager(nsINode *aNode);
|
|
|
|
static bool IsInitialized()
|
|
{
|
|
return sInitialized;
|
|
}
|
|
|
|
/**
|
|
* Checks if the localname/prefix/namespace triple is valid wrt prefix
|
|
* and namespace according to the Namespaces in XML and DOM Code
|
|
* specfications.
|
|
*
|
|
* @param aLocalname localname of the node
|
|
* @param aPrefix prefix of the node
|
|
* @param aNamespaceID namespace of the node
|
|
*/
|
|
static bool IsValidNodeName(nsIAtom *aLocalName, nsIAtom *aPrefix,
|
|
int32_t aNamespaceID);
|
|
|
|
/**
|
|
* Creates a DocumentFragment from text using a context node to resolve
|
|
* namespaces.
|
|
*
|
|
* Note! In the HTML case with the HTML5 parser enabled, this is only called
|
|
* from Range.createContextualFragment() and the implementation here is
|
|
* quirky accordingly (html context node behaves like a body context node).
|
|
* If you don't want that quirky behavior, don't use this method as-is!
|
|
*
|
|
* @param aContextNode the node which is used to resolve namespaces
|
|
* @param aFragment the string which is parsed to a DocumentFragment
|
|
* @param aReturn the resulting fragment
|
|
* @param aPreventScriptExecution whether to mark scripts as already started
|
|
*/
|
|
static nsresult CreateContextualFragment(nsINode* aContextNode,
|
|
const nsAString& aFragment,
|
|
bool aPreventScriptExecution,
|
|
nsIDOMDocumentFragment** aReturn);
|
|
static already_AddRefed<mozilla::dom::DocumentFragment>
|
|
CreateContextualFragment(nsINode* aContextNode, const nsAString& aFragment,
|
|
bool aPreventScriptExecution,
|
|
mozilla::ErrorResult& aRv);
|
|
|
|
/**
|
|
* Invoke the fragment parsing algorithm (innerHTML) using the HTML parser.
|
|
*
|
|
* @param aSourceBuffer the string being set as innerHTML
|
|
* @param aTargetNode the target container
|
|
* @param aContextLocalName local name of context node
|
|
* @param aContextNamespace namespace of context node
|
|
* @param aQuirks true to make <table> not close <p>
|
|
* @param aPreventScriptExecution true to prevent scripts from executing;
|
|
* don't set to false when parsing into a target node that has been
|
|
* bound to tree.
|
|
* @return NS_ERROR_DOM_INVALID_STATE_ERR if a re-entrant attempt to parse
|
|
* fragments is made, NS_ERROR_OUT_OF_MEMORY if aSourceBuffer is too
|
|
* long and NS_OK otherwise.
|
|
*/
|
|
static nsresult ParseFragmentHTML(const nsAString& aSourceBuffer,
|
|
nsIContent* aTargetNode,
|
|
nsIAtom* aContextLocalName,
|
|
int32_t aContextNamespace,
|
|
bool aQuirks,
|
|
bool aPreventScriptExecution);
|
|
|
|
/**
|
|
* Invoke the fragment parsing algorithm (innerHTML) using the XML parser.
|
|
*
|
|
* @param aSourceBuffer the string being set as innerHTML
|
|
* @param aTargetNode the target container
|
|
* @param aTagStack the namespace mapping context
|
|
* @param aPreventExecution whether to mark scripts as already started
|
|
* @param aReturn the result fragment
|
|
* @return NS_ERROR_DOM_INVALID_STATE_ERR if a re-entrant attempt to parse
|
|
* fragments is made, a return code from the XML parser.
|
|
*/
|
|
static nsresult ParseFragmentXML(const nsAString& aSourceBuffer,
|
|
nsIDocument* aDocument,
|
|
nsTArray<nsString>& aTagStack,
|
|
bool aPreventScriptExecution,
|
|
nsIDOMDocumentFragment** aReturn);
|
|
|
|
/**
|
|
* Parse a string into a document using the HTML parser.
|
|
* Script elements are marked unexecutable.
|
|
*
|
|
* @param aSourceBuffer the string to parse as an HTML document
|
|
* @param aTargetDocument the document object to parse into. Must not have
|
|
* child nodes.
|
|
* @param aScriptingEnabledForNoscriptParsing whether <noscript> is parsed
|
|
* as if scripting was enabled
|
|
* @return NS_ERROR_DOM_INVALID_STATE_ERR if a re-entrant attempt to parse
|
|
* fragments is made, NS_ERROR_OUT_OF_MEMORY if aSourceBuffer is too
|
|
* long and NS_OK otherwise.
|
|
*/
|
|
static nsresult ParseDocumentHTML(const nsAString& aSourceBuffer,
|
|
nsIDocument* aTargetDocument,
|
|
bool aScriptingEnabledForNoscriptParsing);
|
|
|
|
/**
|
|
* Converts HTML source to plain text by parsing the source and using the
|
|
* plain text serializer on the resulting tree.
|
|
*
|
|
* @param aSourceBuffer the string to parse as an HTML document
|
|
* @param aResultBuffer the string where the plain text result appears;
|
|
* may be the same string as aSourceBuffer
|
|
* @param aFlags Flags from nsIDocumentEncoder.
|
|
* @param aWrapCol Number of columns after which to line wrap; 0 for no
|
|
* auto-wrapping
|
|
* @return NS_ERROR_DOM_INVALID_STATE_ERR if a re-entrant attempt to parse
|
|
* fragments is made, NS_ERROR_OUT_OF_MEMORY if aSourceBuffer is too
|
|
* long and NS_OK otherwise.
|
|
*/
|
|
static nsresult ConvertToPlainText(const nsAString& aSourceBuffer,
|
|
nsAString& aResultBuffer,
|
|
uint32_t aFlags,
|
|
uint32_t aWrapCol);
|
|
|
|
/**
|
|
* Sets the text contents of a node by replacing all existing children
|
|
* with a single text child.
|
|
*
|
|
* The function always notifies.
|
|
*
|
|
* Will reuse the first text child if one is available. Will not reuse
|
|
* existing cdata children.
|
|
*
|
|
* @param aContent Node to set contents of.
|
|
* @param aValue Value to set contents to.
|
|
* @param aTryReuse When true, the function will try to reuse an existing
|
|
* textnodes rather than always creating a new one.
|
|
*/
|
|
static nsresult SetNodeTextContent(nsIContent* aContent,
|
|
const nsAString& aValue,
|
|
bool aTryReuse);
|
|
|
|
/**
|
|
* Get the textual contents of a node. This is a concatenation of all
|
|
* textnodes that are direct or (depending on aDeep) indirect children
|
|
* of the node.
|
|
*
|
|
* NOTE! No serialization takes place and <br> elements
|
|
* are not converted into newlines. Only textnodes and cdata nodes are
|
|
* added to the result.
|
|
*
|
|
* @param aNode Node to get textual contents of.
|
|
* @param aDeep If true child elements of aNode are recursivly descended
|
|
* into to find text children.
|
|
* @param aResult the result. Out param.
|
|
*/
|
|
static void GetNodeTextContent(nsINode* aNode, bool aDeep,
|
|
nsAString& aResult)
|
|
{
|
|
aResult.Truncate();
|
|
AppendNodeTextContent(aNode, aDeep, aResult);
|
|
}
|
|
|
|
/**
|
|
* Same as GetNodeTextContents but appends the result rather than sets it.
|
|
*/
|
|
static void AppendNodeTextContent(nsINode* aNode, bool aDeep,
|
|
nsAString& aResult);
|
|
|
|
/**
|
|
* Utility method that checks if a given node has any non-empty
|
|
* children.
|
|
* NOTE! This method does not descend recursivly into elements.
|
|
* Though it would be easy to make it so if needed
|
|
*/
|
|
static bool HasNonEmptyTextContent(nsINode* aNode);
|
|
|
|
/**
|
|
* Delete strings allocated for nsContentList matches
|
|
*/
|
|
static void DestroyMatchString(void* aData)
|
|
{
|
|
if (aData) {
|
|
nsString* matchString = static_cast<nsString*>(aData);
|
|
delete matchString;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Unbinds the content from the tree and nulls it out if it's not null.
|
|
*/
|
|
static void DestroyAnonymousContent(nsCOMPtr<nsIContent>* aContent);
|
|
|
|
/**
|
|
* Keep the JS objects held by aScriptObjectHolder alive.
|
|
*
|
|
* @param aScriptObjectHolder the object that holds JS objects that we want to
|
|
* keep alive
|
|
* @param aTracer the tracer for aScriptObject
|
|
*/
|
|
static void HoldJSObjects(void* aScriptObjectHolder,
|
|
nsScriptObjectTracer* aTracer);
|
|
|
|
/**
|
|
* Drop the JS objects held by aScriptObjectHolder.
|
|
*
|
|
* @param aScriptObjectHolder the object that holds JS objects that we want to
|
|
* drop
|
|
*/
|
|
static void DropJSObjects(void* aScriptObjectHolder);
|
|
|
|
#ifdef DEBUG
|
|
static bool AreJSObjectsHeld(void* aScriptObjectHolder);
|
|
|
|
static void CheckCCWrapperTraversal(void* aScriptObjectHolder,
|
|
nsWrapperCache* aCache,
|
|
nsScriptObjectTracer* aTracer);
|
|
#endif
|
|
|
|
static void PreserveWrapper(nsISupports* aScriptObjectHolder,
|
|
nsWrapperCache* aCache)
|
|
{
|
|
if (!aCache->PreservingWrapper()) {
|
|
nsISupports *ccISupports;
|
|
aScriptObjectHolder->QueryInterface(NS_GET_IID(nsCycleCollectionISupports),
|
|
reinterpret_cast<void**>(&ccISupports));
|
|
MOZ_ASSERT(ccISupports);
|
|
nsXPCOMCycleCollectionParticipant* participant;
|
|
CallQueryInterface(ccISupports, &participant);
|
|
PreserveWrapper(ccISupports, aCache, participant);
|
|
}
|
|
}
|
|
static void PreserveWrapper(void* aScriptObjectHolder,
|
|
nsWrapperCache* aCache,
|
|
nsScriptObjectTracer* aTracer)
|
|
{
|
|
if (!aCache->PreservingWrapper()) {
|
|
HoldJSObjects(aScriptObjectHolder, aTracer);
|
|
aCache->SetPreservingWrapper(true);
|
|
#ifdef DEBUG
|
|
// Make sure the cycle collector will be able to traverse to the wrapper.
|
|
CheckCCWrapperTraversal(aScriptObjectHolder, aCache, aTracer);
|
|
#endif
|
|
}
|
|
}
|
|
static void ReleaseWrapper(void* aScriptObjectHolder,
|
|
nsWrapperCache* aCache);
|
|
|
|
/*
|
|
* Notify when the first XUL menu is opened and when the all XUL menus are
|
|
* closed. At opening, aInstalling should be TRUE, otherwise, it should be
|
|
* FALSE.
|
|
*/
|
|
static void NotifyInstalledMenuKeyboardListener(bool aInstalling);
|
|
|
|
/**
|
|
* Do security checks before loading a resource. Does the following checks:
|
|
* nsIScriptSecurityManager::CheckLoadURIWithPrincipal
|
|
* NS_CheckContentLoadPolicy
|
|
* nsIScriptSecurityManager::CheckSameOriginURI
|
|
*
|
|
* You will still need to do at least SameOrigin checks before on redirects.
|
|
*
|
|
* @param aURIToLoad URI that is getting loaded.
|
|
* @param aLoadingPrincipal Principal of the resource that is initiating
|
|
* the load
|
|
* @param aCheckLoadFlags Flags to be passed to
|
|
* nsIScriptSecurityManager::CheckLoadURIWithPrincipal
|
|
* NOTE: If this contains ALLOW_CHROME the
|
|
* CheckSameOriginURI check will be skipped if
|
|
* aURIToLoad is a chrome uri.
|
|
* @param aAllowData Set to true to skip CheckSameOriginURI check when
|
|
aURIToLoad is a data uri.
|
|
* @param aContentPolicyType Type \
|
|
* @param aContext Context |- to be passed to
|
|
* @param aMimeGuess Mimetype | NS_CheckContentLoadPolicy
|
|
* @param aExtra Extra /
|
|
*/
|
|
static nsresult CheckSecurityBeforeLoad(nsIURI* aURIToLoad,
|
|
nsIPrincipal* aLoadingPrincipal,
|
|
uint32_t aCheckLoadFlags,
|
|
bool aAllowData,
|
|
uint32_t aContentPolicyType,
|
|
nsISupports* aContext,
|
|
const nsACString& aMimeGuess = EmptyCString(),
|
|
nsISupports* aExtra = nullptr);
|
|
|
|
/**
|
|
* Returns true if aPrincipal is the system principal.
|
|
*/
|
|
static bool IsSystemPrincipal(nsIPrincipal* aPrincipal);
|
|
|
|
/**
|
|
* Gets the system principal from the security manager.
|
|
*/
|
|
static nsIPrincipal* GetSystemPrincipal();
|
|
|
|
/**
|
|
* *aResourcePrincipal is a principal describing who may access the contents
|
|
* of a resource. The resource can only be consumed by a principal that
|
|
* subsumes *aResourcePrincipal. MAKE SURE THAT NOTHING EVER ACTS WITH THE
|
|
* AUTHORITY OF *aResourcePrincipal.
|
|
* It may be null to indicate that the resource has no data from any origin
|
|
* in it yet and anything may access the resource.
|
|
* Additional data is being mixed into the resource from aExtraPrincipal
|
|
* (which may be null; if null, no data is being mixed in and this function
|
|
* will do nothing). Update *aResourcePrincipal to reflect the new data.
|
|
* If *aResourcePrincipal subsumes aExtraPrincipal, nothing needs to change,
|
|
* otherwise *aResourcePrincipal is replaced with the system principal.
|
|
* Returns true if *aResourcePrincipal changed.
|
|
*/
|
|
static bool CombineResourcePrincipals(nsCOMPtr<nsIPrincipal>* aResourcePrincipal,
|
|
nsIPrincipal* aExtraPrincipal);
|
|
|
|
/**
|
|
* Trigger a link with uri aLinkURI. If aClick is false, this triggers a
|
|
* mouseover on the link, otherwise it triggers a load after doing a
|
|
* security check using aContent's principal.
|
|
*
|
|
* @param aContent the node on which a link was triggered.
|
|
* @param aPresContext the pres context, must be non-null.
|
|
* @param aLinkURI the URI of the link, must be non-null.
|
|
* @param aTargetSpec the target (like target=, may be empty).
|
|
* @param aClick whether this was a click or not (if false, this method
|
|
* assumes you just hovered over the link).
|
|
* @param aIsUserTriggered whether the user triggered the link. This would be
|
|
* false for loads from auto XLinks or from the
|
|
* click() method if we ever implement it.
|
|
* @param aIsTrusted If false, JS Context will be pushed to stack
|
|
* when the link is triggered.
|
|
*/
|
|
static void TriggerLink(nsIContent *aContent, nsPresContext *aPresContext,
|
|
nsIURI *aLinkURI, const nsString& aTargetSpec,
|
|
bool aClick, bool aIsUserTriggered,
|
|
bool aIsTrusted);
|
|
|
|
/**
|
|
* Get the link location.
|
|
*/
|
|
static void GetLinkLocation(mozilla::dom::Element* aElement,
|
|
nsString& aLocationString);
|
|
|
|
/**
|
|
* Return top-level widget in the parent chain.
|
|
*/
|
|
static nsIWidget* GetTopLevelWidget(nsIWidget* aWidget);
|
|
|
|
/**
|
|
* Return the localized ellipsis for UI.
|
|
*/
|
|
static const nsDependentString GetLocalizedEllipsis();
|
|
|
|
/**
|
|
* The routine GetNativeEvent is used to fill nsNativeKeyEvent.
|
|
* It's also used in DOMEventToNativeKeyEvent.
|
|
* See bug 406407 for details.
|
|
*/
|
|
static nsEvent* GetNativeEvent(nsIDOMEvent* aDOMEvent);
|
|
static bool DOMEventToNativeKeyEvent(nsIDOMKeyEvent* aKeyEvent,
|
|
nsNativeKeyEvent* aNativeEvent,
|
|
bool aGetCharCode);
|
|
|
|
/**
|
|
* Get the candidates for accelkeys for aDOMKeyEvent.
|
|
*
|
|
* @param aDOMKeyEvent [in] the key event for accelkey handling.
|
|
* @param aCandidates [out] the candidate shortcut key combination list.
|
|
* the first item is most preferred.
|
|
*/
|
|
static void GetAccelKeyCandidates(nsIDOMKeyEvent* aDOMKeyEvent,
|
|
nsTArray<nsShortcutCandidate>& aCandidates);
|
|
|
|
/**
|
|
* Get the candidates for accesskeys for aNativeKeyEvent.
|
|
*
|
|
* @param aNativeKeyEvent [in] the key event for accesskey handling.
|
|
* @param aCandidates [out] the candidate access key list.
|
|
* the first item is most preferred.
|
|
*/
|
|
static void GetAccessKeyCandidates(nsKeyEvent* aNativeKeyEvent,
|
|
nsTArray<uint32_t>& aCandidates);
|
|
|
|
/**
|
|
* Hide any XUL popups associated with aDocument, including any documents
|
|
* displayed in child frames. Does nothing if aDocument is null.
|
|
*/
|
|
static void HidePopupsInDocument(nsIDocument* aDocument);
|
|
|
|
/**
|
|
* Retrieve the current drag session, or null if no drag is currently occuring
|
|
*/
|
|
static already_AddRefed<nsIDragSession> GetDragSession();
|
|
|
|
/*
|
|
* Initialize and set the dataTransfer field of an nsDragEvent.
|
|
*/
|
|
static nsresult SetDataTransferInEvent(nsDragEvent* aDragEvent);
|
|
|
|
// filters the drag and drop action to fit within the effects allowed and
|
|
// returns it.
|
|
static uint32_t FilterDropEffect(uint32_t aAction, uint32_t aEffectAllowed);
|
|
|
|
/*
|
|
* Return true if the target of a drop event is a content document that is
|
|
* an ancestor of the document for the source of the drag.
|
|
*/
|
|
static bool CheckForSubFrameDrop(nsIDragSession* aDragSession,
|
|
nsDragEvent* aDropEvent);
|
|
|
|
/**
|
|
* Return true if aURI is a local file URI (i.e. file://).
|
|
*/
|
|
static bool URIIsLocalFile(nsIURI *aURI);
|
|
|
|
/**
|
|
* Given a URI, return set beforeHash to the part before the '#', and
|
|
* afterHash to the remainder of the URI, including the '#'.
|
|
*/
|
|
static nsresult SplitURIAtHash(nsIURI *aURI,
|
|
nsACString &aBeforeHash,
|
|
nsACString &aAfterHash);
|
|
|
|
/**
|
|
* Get the application manifest URI for this document. The manifest URI
|
|
* is specified in the manifest= attribute of the root element of the
|
|
* document.
|
|
*
|
|
* @param aDocument The document that lists the manifest.
|
|
* @param aURI The manifest URI.
|
|
*/
|
|
static void GetOfflineAppManifest(nsIDocument *aDocument, nsIURI **aURI);
|
|
|
|
/**
|
|
* Check whether an application should be allowed to use offline APIs.
|
|
*/
|
|
static bool OfflineAppAllowed(nsIURI *aURI);
|
|
|
|
/**
|
|
* Check whether an application should be allowed to use offline APIs.
|
|
*/
|
|
static bool OfflineAppAllowed(nsIPrincipal *aPrincipal);
|
|
|
|
/**
|
|
* Increases the count of blockers preventing scripts from running.
|
|
* NOTE: You might want to use nsAutoScriptBlocker rather than calling
|
|
* this directly
|
|
*/
|
|
static void AddScriptBlocker();
|
|
|
|
/**
|
|
* Decreases the count of blockers preventing scripts from running.
|
|
* NOTE: You might want to use nsAutoScriptBlocker rather than calling
|
|
* this directly
|
|
*
|
|
* WARNING! Calling this function could synchronously execute scripts.
|
|
*/
|
|
static void RemoveScriptBlocker();
|
|
|
|
/**
|
|
* Add a runnable that is to be executed as soon as it's safe to execute
|
|
* scripts.
|
|
* NOTE: If it's currently safe to execute scripts, aRunnable will be run
|
|
* synchronously before the function returns.
|
|
*
|
|
* @param aRunnable The nsIRunnable to run as soon as it's safe to execute
|
|
* scripts. Passing null is allowed and results in nothing
|
|
* happening. It is also allowed to pass an object that
|
|
* has not yet been AddRefed.
|
|
* @return false on out of memory, true otherwise.
|
|
*/
|
|
static bool AddScriptRunner(nsIRunnable* aRunnable);
|
|
|
|
/**
|
|
* Returns true if it's safe to execute content script and false otherwise.
|
|
*
|
|
* The only known case where this lies is mutation events. They run, and can
|
|
* run anything else, when this function returns false, but this is ok.
|
|
*/
|
|
static bool IsSafeToRunScript() {
|
|
return sScriptBlockerCount == 0;
|
|
}
|
|
|
|
/**
|
|
* Retrieve information about the viewport as a data structure.
|
|
* This will return information in the viewport META data section
|
|
* of the document. This can be used in lieu of ProcessViewportInfo(),
|
|
* which places the viewport information in the document header instead
|
|
* of returning it directly.
|
|
*
|
|
* @param aDisplayWidth width of the on-screen display area for this
|
|
* document, in device pixels.
|
|
* @param aDisplayHeight height of the on-screen display area for this
|
|
* document, in device pixels.
|
|
*
|
|
* NOTE: If the site is optimized for mobile (via the doctype), this
|
|
* will return viewport information that specifies default information.
|
|
*/
|
|
static nsViewportInfo GetViewportInfo(nsIDocument* aDocument,
|
|
uint32_t aDisplayWidth,
|
|
uint32_t aDisplayHeight);
|
|
|
|
/**
|
|
* The device-pixel-to-CSS-px ratio used to adjust meta viewport values.
|
|
*/
|
|
static double GetDevicePixelsPerMetaViewportPixel(nsIWidget* aWidget);
|
|
|
|
// Call EnterMicroTask when you're entering JS execution.
|
|
// Usually the best way to do this is to use nsAutoMicroTask.
|
|
static void EnterMicroTask() { ++sMicroTaskLevel; }
|
|
static void LeaveMicroTask();
|
|
|
|
static bool IsInMicroTask() { return sMicroTaskLevel != 0; }
|
|
static uint32_t MicroTaskLevel() { return sMicroTaskLevel; }
|
|
static void SetMicroTaskLevel(uint32_t aLevel) { sMicroTaskLevel = aLevel; }
|
|
|
|
/* Process viewport META data. This gives us information for the scale
|
|
* and zoom of a page on mobile devices. We stick the information in
|
|
* the document header and use it later on after rendering.
|
|
*
|
|
* See Bug #436083
|
|
*/
|
|
static nsresult ProcessViewportInfo(nsIDocument *aDocument,
|
|
const nsAString &viewportInfo);
|
|
|
|
static nsIScriptContext* GetContextForEventHandlers(nsINode* aNode,
|
|
nsresult* aRv);
|
|
|
|
static JSContext *GetCurrentJSContext();
|
|
static JSContext *GetSafeJSContext();
|
|
|
|
/**
|
|
* Case insensitive comparison between two strings. However it only ignores
|
|
* case for ASCII characters a-z.
|
|
*/
|
|
static bool EqualsIgnoreASCIICase(const nsAString& aStr1,
|
|
const nsAString& aStr2);
|
|
|
|
/**
|
|
* Convert ASCII A-Z to a-z.
|
|
* @return NS_OK on success, or NS_ERROR_OUT_OF_MEMORY if making the string
|
|
* writable needs to allocate memory and that allocation fails.
|
|
*/
|
|
static nsresult ASCIIToLower(nsAString& aStr);
|
|
static nsresult ASCIIToLower(const nsAString& aSource, nsAString& aDest);
|
|
|
|
/**
|
|
* Convert ASCII a-z to A-Z.
|
|
* @return NS_OK on success, or NS_ERROR_OUT_OF_MEMORY if making the string
|
|
* writable needs to allocate memory and that allocation fails.
|
|
*/
|
|
static nsresult ASCIIToUpper(nsAString& aStr);
|
|
static nsresult ASCIIToUpper(const nsAString& aSource, nsAString& aDest);
|
|
|
|
/**
|
|
* Return whether aStr contains an ASCII uppercase character.
|
|
*/
|
|
static bool StringContainsASCIIUpper(const nsAString& aStr);
|
|
|
|
// Returns NS_OK for same origin, error (NS_ERROR_DOM_BAD_URI) if not.
|
|
static nsresult CheckSameOrigin(nsIChannel *aOldChannel, nsIChannel *aNewChannel);
|
|
static nsIInterfaceRequestor* GetSameOriginChecker();
|
|
|
|
// Trace the safe JS context.
|
|
static void TraceSafeJSContext(JSTracer* aTrc);
|
|
|
|
|
|
/**
|
|
* Get the Origin of the passed in nsIPrincipal or nsIURI. If the passed in
|
|
* nsIURI or the URI of the passed in nsIPrincipal does not have a host, the
|
|
* origin is set to 'null'.
|
|
*
|
|
* The ASCII versions return a ASCII strings that are puny-code encoded,
|
|
* suitable for, for example, header values. The UTF versions return strings
|
|
* containing international characters.
|
|
*
|
|
* @pre aPrincipal/aOrigin must not be null.
|
|
*
|
|
* @note this should be used for HTML5 origin determination.
|
|
*/
|
|
static nsresult GetASCIIOrigin(nsIPrincipal* aPrincipal,
|
|
nsCString& aOrigin);
|
|
static nsresult GetASCIIOrigin(nsIURI* aURI, nsCString& aOrigin);
|
|
static nsresult GetUTFOrigin(nsIPrincipal* aPrincipal,
|
|
nsString& aOrigin);
|
|
static nsresult GetUTFOrigin(nsIURI* aURI, nsString& aOrigin);
|
|
|
|
/**
|
|
* This method creates and dispatches "command" event, which implements
|
|
* nsIDOMXULCommandEvent.
|
|
* If aShell is not null, dispatching goes via
|
|
* nsIPresShell::HandleDOMEventWithTarget.
|
|
*/
|
|
static nsresult DispatchXULCommand(nsIContent* aTarget,
|
|
bool aTrusted,
|
|
nsIDOMEvent* aSourceEvent = nullptr,
|
|
nsIPresShell* aShell = nullptr,
|
|
bool aCtrl = false,
|
|
bool aAlt = false,
|
|
bool aShift = false,
|
|
bool aMeta = false);
|
|
|
|
/**
|
|
* Gets the nsIDocument given the script context. Will return nullptr on failure.
|
|
*
|
|
* @param aScriptContext the script context to get the document for; can be null
|
|
*
|
|
* @return the document associated with the script context
|
|
*/
|
|
static already_AddRefed<nsIDocument>
|
|
GetDocumentFromScriptContext(nsIScriptContext *aScriptContext);
|
|
|
|
static bool CheckMayLoad(nsIPrincipal* aPrincipal, nsIChannel* aChannel, bool aAllowIfInheritsPrincipal);
|
|
|
|
/**
|
|
* The method checks whether the caller can access native anonymous content.
|
|
* If there is no JS in the stack or privileged JS is running, this
|
|
* method returns true, otherwise false.
|
|
*/
|
|
static bool CanAccessNativeAnon();
|
|
|
|
static nsresult WrapNative(JSContext *cx, JS::Handle<JSObject*> scope,
|
|
nsISupports *native, const nsIID* aIID,
|
|
JS::Value *vp,
|
|
// If non-null aHolder will keep the Value alive
|
|
// while there's a ref to it
|
|
nsIXPConnectJSObjectHolder** aHolder = nullptr,
|
|
bool aAllowWrapping = false)
|
|
{
|
|
return WrapNative(cx, scope, native, nullptr, aIID, vp, aHolder,
|
|
aAllowWrapping);
|
|
}
|
|
|
|
// Same as the WrapNative above, but use this one if aIID is nsISupports' IID.
|
|
static nsresult WrapNative(JSContext *cx, JS::Handle<JSObject*> scope,
|
|
nsISupports *native, JS::Value *vp,
|
|
// If non-null aHolder will keep the Value alive
|
|
// while there's a ref to it
|
|
nsIXPConnectJSObjectHolder** aHolder = nullptr,
|
|
bool aAllowWrapping = false)
|
|
{
|
|
return WrapNative(cx, scope, native, nullptr, nullptr, vp, aHolder,
|
|
aAllowWrapping);
|
|
}
|
|
static nsresult WrapNative(JSContext *cx, JS::Handle<JSObject*> scope,
|
|
nsISupports *native, nsWrapperCache *cache,
|
|
JS::Value *vp,
|
|
// If non-null aHolder will keep the Value alive
|
|
// while there's a ref to it
|
|
nsIXPConnectJSObjectHolder** aHolder = nullptr,
|
|
bool aAllowWrapping = false)
|
|
{
|
|
return WrapNative(cx, scope, native, cache, nullptr, vp, aHolder,
|
|
aAllowWrapping);
|
|
}
|
|
|
|
/**
|
|
* Creates an arraybuffer from a binary string.
|
|
*/
|
|
static nsresult CreateArrayBuffer(JSContext *aCx, const nsACString& aData,
|
|
JSObject** aResult);
|
|
|
|
static nsresult CreateBlobBuffer(JSContext* aCx,
|
|
const nsACString& aData,
|
|
JS::MutableHandle<JS::Value> aBlob);
|
|
|
|
static void StripNullChars(const nsAString& aInStr, nsAString& aOutStr);
|
|
|
|
/**
|
|
* Strip all \n, \r and nulls from the given string
|
|
* @param aString the string to remove newlines from [in/out]
|
|
*/
|
|
static void RemoveNewlines(nsString &aString);
|
|
|
|
/**
|
|
* Convert Windows and Mac platform linebreaks to \n.
|
|
* @param aString the string to convert the newlines inside [in/out]
|
|
*/
|
|
static void PlatformToDOMLineBreaks(nsString &aString);
|
|
|
|
static bool IsHandlingKeyBoardEvent()
|
|
{
|
|
return sIsHandlingKeyBoardEvent;
|
|
}
|
|
|
|
static void SetIsHandlingKeyBoardEvent(bool aHandling)
|
|
{
|
|
sIsHandlingKeyBoardEvent = aHandling;
|
|
}
|
|
|
|
/**
|
|
* Utility method for getElementsByClassName. aRootNode is the node (either
|
|
* document or element), which getElementsByClassName was called on.
|
|
*/
|
|
static already_AddRefed<nsContentList>
|
|
GetElementsByClassName(nsINode* aRootNode, const nsAString& aClasses)
|
|
{
|
|
NS_PRECONDITION(aRootNode, "Must have root node");
|
|
|
|
return NS_GetFuncStringHTMLCollection(aRootNode, MatchClassNames,
|
|
DestroyClassNameArray,
|
|
AllocClassMatchingInfo,
|
|
aClasses);
|
|
}
|
|
|
|
/**
|
|
* Returns a presshell for this document, if there is one. This will be
|
|
* aDoc's direct presshell if there is one, otherwise we'll look at all
|
|
* ancestor documents to try to find a presshell, so for example this can
|
|
* still find a presshell for documents in display:none frames that have
|
|
* no presentation. So you have to be careful how you use this presshell ---
|
|
* getting generic data like a device context or widget from it is OK, but it
|
|
* might not be this document's actual presentation.
|
|
*/
|
|
static nsIPresShell* FindPresShellForDocument(const nsIDocument* aDoc);
|
|
|
|
/**
|
|
* Returns the widget for this document if there is one. Looks at all ancestor
|
|
* documents to try to find a widget, so for example this can still find a
|
|
* widget for documents in display:none frames that have no presentation.
|
|
*/
|
|
static nsIWidget* WidgetForDocument(const nsIDocument* aDoc);
|
|
|
|
/**
|
|
* Returns a layer manager to use for the given document. Basically we
|
|
* look up the document hierarchy for the first document which has
|
|
* a presentation with an associated widget, and use that widget's
|
|
* layer manager.
|
|
*
|
|
* @param aDoc the document for which to return a layer manager.
|
|
* @param aAllowRetaining an outparam that states whether the returned
|
|
* layer manager should be used for retained layers
|
|
*/
|
|
static already_AddRefed<mozilla::layers::LayerManager>
|
|
LayerManagerForDocument(const nsIDocument *aDoc, bool *aAllowRetaining = nullptr);
|
|
|
|
/**
|
|
* Returns a layer manager to use for the given document. Basically we
|
|
* look up the document hierarchy for the first document which has
|
|
* a presentation with an associated widget, and use that widget's
|
|
* layer manager. In addition to the normal layer manager lookup this will
|
|
* specifically request a persistent layer manager. This means that the layer
|
|
* manager is expected to remain the layer manager for the document in the
|
|
* forseeable future. This function should be used carefully as it may change
|
|
* the document's layer manager.
|
|
*
|
|
* @param aDoc the document for which to return a layer manager.
|
|
* @param aAllowRetaining an outparam that states whether the returned
|
|
* layer manager should be used for retained layers
|
|
*/
|
|
static already_AddRefed<mozilla::layers::LayerManager>
|
|
PersistentLayerManagerForDocument(nsIDocument *aDoc, bool *aAllowRetaining = nullptr);
|
|
|
|
/**
|
|
* Determine whether a content node is focused or not,
|
|
*
|
|
* @param aContent the content node to check
|
|
* @return true if the content node is focused, false otherwise.
|
|
*/
|
|
static bool IsFocusedContent(const nsIContent *aContent);
|
|
|
|
/**
|
|
* Returns true if the DOM full-screen API is enabled.
|
|
*/
|
|
static bool IsFullScreenApiEnabled();
|
|
|
|
/**
|
|
* Returns true if requests for full-screen are allowed in the current
|
|
* context. Requests are only allowed if the user initiated them (like with
|
|
* a mouse-click or key press), unless this check has been disabled by
|
|
* setting the pref "full-screen-api.allow-trusted-requests-only" to false.
|
|
*/
|
|
static bool IsRequestFullScreenAllowed();
|
|
|
|
/**
|
|
* Returns true if the DOM fullscreen API is restricted to content only.
|
|
* This mirrors the pref "full-screen-api.content-only". If this is true,
|
|
* fullscreen requests in chrome are denied, and fullscreen requests in
|
|
* content stop percolating upwards before they reach chrome documents.
|
|
* That is, when an element in content requests fullscreen, only its
|
|
* containing frames that are in content are also made fullscreen, not
|
|
* the containing frame in the chrome document.
|
|
*
|
|
* Note if the fullscreen API is running in content only mode then multiple
|
|
* branches of a doctree can be fullscreen at the same time, but no fullscreen
|
|
* document will have a common ancestor with another fullscreen document
|
|
* that is also fullscreen (since the only common ancestor they can have
|
|
* is the chrome document, and that can't be fullscreen). i.e. multiple
|
|
* child documents of the chrome document can be fullscreen, but the chrome
|
|
* document won't be fullscreen.
|
|
*
|
|
* Making the fullscreen API content only is useful on platforms where we
|
|
* still want chrome to be visible or accessible while content is
|
|
* fullscreen, like on Windows 8 in Metro mode.
|
|
*
|
|
* Note that if the fullscreen API is content only, chrome can still go
|
|
* fullscreen by setting the "fullScreen" attribute on its XUL window.
|
|
*/
|
|
static bool IsFullscreenApiContentOnly();
|
|
|
|
/**
|
|
* Returns true if the idle observers API is enabled.
|
|
*/
|
|
static bool IsIdleObserverAPIEnabled() { return sIsIdleObserverAPIEnabled; }
|
|
|
|
/*
|
|
* Returns true if the performance timing APIs are enabled.
|
|
*/
|
|
static bool IsPerformanceTimingEnabled()
|
|
{
|
|
return sIsPerformanceTimingEnabled;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the doc tree branch which contains aDoc contains any
|
|
* plugins which we don't control event dispatch for, i.e. do any plugins
|
|
* in the same tab as this document receive key events outside of our
|
|
* control? This always returns false on MacOSX.
|
|
*/
|
|
static bool HasPluginWithUncontrolledEventDispatch(nsIDocument* aDoc);
|
|
|
|
/**
|
|
* Returns true if the content is in a document and contains a plugin
|
|
* which we don't control event dispatch for, i.e. do any plugins in this
|
|
* doc tree receive key events outside of our control? This always returns
|
|
* false on MacOSX.
|
|
*/
|
|
static bool HasPluginWithUncontrolledEventDispatch(nsIContent* aContent);
|
|
|
|
/**
|
|
* Returns the document that is the closest ancestor to aDoc that is
|
|
* fullscreen. If aDoc is fullscreen this returns aDoc. If aDoc is not
|
|
* fullscreen and none of aDoc's ancestors are fullscreen this returns
|
|
* nullptr.
|
|
*/
|
|
static nsIDocument* GetFullscreenAncestor(nsIDocument* aDoc);
|
|
|
|
/**
|
|
* Returns true if aWin and the current pointer lock document
|
|
* have common scriptable top window.
|
|
*/
|
|
static bool IsInPointerLockContext(nsIDOMWindow* aWin);
|
|
|
|
/**
|
|
* Returns the time limit on handling user input before
|
|
* nsEventStateManager::IsHandlingUserInput() stops returning true.
|
|
* This enables us to detect long running user-generated event handlers.
|
|
*/
|
|
static TimeDuration HandlingUserInputTimeout();
|
|
|
|
static void GetShiftText(nsAString& text);
|
|
static void GetControlText(nsAString& text);
|
|
static void GetMetaText(nsAString& text);
|
|
static void GetOSText(nsAString& text);
|
|
static void GetAltText(nsAString& text);
|
|
static void GetModifierSeparatorText(nsAString& text);
|
|
|
|
/**
|
|
* Returns if aContent has a tabbable subdocument.
|
|
* A sub document isn't tabbable when it's a zombie document.
|
|
*
|
|
* @param aElement element to test.
|
|
*
|
|
* @return Whether the subdocument is tabbable.
|
|
*/
|
|
static bool IsSubDocumentTabbable(nsIContent* aContent);
|
|
|
|
/**
|
|
* Flushes the layout tree (recursively)
|
|
*
|
|
* @param aWindow the window the flush should start at
|
|
*
|
|
*/
|
|
static void FlushLayoutForTree(nsIDOMWindow* aWindow);
|
|
|
|
/**
|
|
* Returns true if content with the given principal is allowed to use XUL
|
|
* and XBL and false otherwise.
|
|
*/
|
|
static bool AllowXULXBLForPrincipal(nsIPrincipal* aPrincipal);
|
|
|
|
/**
|
|
* Perform cleanup that's appropriate for XPCOM shutdown.
|
|
*/
|
|
static void XPCOMShutdown();
|
|
|
|
enum ContentViewerType
|
|
{
|
|
TYPE_UNSUPPORTED,
|
|
TYPE_CONTENT,
|
|
TYPE_PLUGIN,
|
|
TYPE_UNKNOWN
|
|
};
|
|
|
|
static already_AddRefed<nsIDocumentLoaderFactory>
|
|
FindInternalContentViewer(const char* aType,
|
|
ContentViewerType* aLoaderType = nullptr);
|
|
|
|
/**
|
|
* This helper method returns true if the aPattern pattern matches aValue.
|
|
* aPattern should not contain leading and trailing slashes (/).
|
|
* The pattern has to match the entire value not just a subset.
|
|
* aDocument must be a valid pointer (not null).
|
|
*
|
|
* This is following the HTML5 specification:
|
|
* http://dev.w3.org/html5/spec/forms.html#attr-input-pattern
|
|
*
|
|
* WARNING: This method mutates aPattern and aValue!
|
|
*
|
|
* @param aValue the string to check.
|
|
* @param aPattern the string defining the pattern.
|
|
* @param aDocument the owner document of the element.
|
|
* @result whether the given string is matches the pattern.
|
|
*/
|
|
static bool IsPatternMatching(nsAString& aValue, nsAString& aPattern,
|
|
nsIDocument* aDocument);
|
|
|
|
/**
|
|
* Calling this adds support for
|
|
* ontouch* event handler DOM attributes.
|
|
*/
|
|
static void InitializeTouchEventTable();
|
|
|
|
/**
|
|
* Test whether the given URI always inherits a security context
|
|
* from the document it comes from.
|
|
*/
|
|
static nsresult URIInheritsSecurityContext(nsIURI *aURI, bool *aResult);
|
|
|
|
/**
|
|
* Set the given principal as the owner of the given channel, if
|
|
* needed. aURI must be the URI of aChannel. aPrincipal may be
|
|
* null. If aSetUpForAboutBlank is true, then about:blank will get
|
|
* the principal set up on it. If aForceOwner is true, the owner
|
|
* will be set on the channel, even if the principal can be determined
|
|
* from the channel.
|
|
* The return value is whether the principal was set up as the owner
|
|
* of the channel.
|
|
*/
|
|
static bool SetUpChannelOwner(nsIPrincipal* aLoadingPrincipal,
|
|
nsIChannel* aChannel,
|
|
nsIURI* aURI,
|
|
bool aSetUpForAboutBlank,
|
|
bool aForceOwner = false);
|
|
|
|
static nsresult Btoa(const nsAString& aBinaryData,
|
|
nsAString& aAsciiBase64String);
|
|
|
|
static nsresult Atob(const nsAString& aAsciiString,
|
|
nsAString& aBinaryData);
|
|
|
|
/**
|
|
* Returns whether the input element passed in parameter has the autocomplete
|
|
* functionality enabled. It is taking into account the form owner.
|
|
* NOTE: the caller has to make sure autocomplete makes sense for the
|
|
* element's type.
|
|
*
|
|
* @param aInput the input element to check. NOTE: aInput can't be null.
|
|
* @return whether the input element has autocomplete enabled.
|
|
*/
|
|
static bool IsAutocompleteEnabled(nsIDOMHTMLInputElement* aInput);
|
|
|
|
/**
|
|
* This will parse aSource, to extract the value of the pseudo attribute
|
|
* with the name specified in aName. See
|
|
* http://www.w3.org/TR/xml-stylesheet/#NT-StyleSheetPI for the specification
|
|
* which is used to parse aSource.
|
|
*
|
|
* @param aSource the string to parse
|
|
* @param aName the name of the attribute to get the value for
|
|
* @param aValue [out] the value for the attribute with name specified in
|
|
* aAttribute. Empty if the attribute isn't present.
|
|
* @return true if the attribute exists and was successfully parsed.
|
|
* false if the attribute doesn't exist, or has a malformed
|
|
* value, such as an unknown or unterminated entity.
|
|
*/
|
|
static bool GetPseudoAttributeValue(const nsString& aSource, nsIAtom *aName,
|
|
nsAString& aValue);
|
|
|
|
/**
|
|
* Returns true if the language name is a version of JavaScript and
|
|
* false otherwise
|
|
*/
|
|
static bool IsJavaScriptLanguage(const nsString& aName);
|
|
|
|
/**
|
|
* Returns the JSVersion for a string of the form '1.n', n = 0, ..., 8, and
|
|
* JSVERSION_UNKNOWN for other strings.
|
|
*/
|
|
static JSVersion ParseJavascriptVersion(const nsAString& aVersionStr);
|
|
|
|
static bool IsJavascriptMIMEType(const nsAString& aMIMEType)
|
|
{
|
|
// Table ordered from most to least likely JS MIME types.
|
|
static const char* jsTypes[] = {
|
|
"text/javascript",
|
|
"text/ecmascript",
|
|
"application/javascript",
|
|
"application/ecmascript",
|
|
"application/x-javascript",
|
|
"application/x-ecmascript",
|
|
"text/javascript1.0",
|
|
"text/javascript1.1",
|
|
"text/javascript1.2",
|
|
"text/javascript1.3",
|
|
"text/javascript1.4",
|
|
"text/javascript1.5",
|
|
"text/jscript",
|
|
"text/livescript",
|
|
"text/x-ecmascript",
|
|
"text/x-javascript",
|
|
nullptr
|
|
};
|
|
|
|
for (uint32_t i = 0; jsTypes[i]; ++i) {
|
|
if (aMIMEType.LowerCaseEqualsASCII(jsTypes[i])) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void SplitMimeType(const nsAString& aValue, nsString& aType,
|
|
nsString& aParams);
|
|
|
|
/**
|
|
* Function checks if the user is idle.
|
|
*
|
|
* @param aRequestedIdleTimeInMS The idle observer's requested idle time.
|
|
* @param aUserIsIdle boolean indicating if the user
|
|
* is currently idle or not. *
|
|
* @return NS_OK NS_OK returned if the requested idle service and
|
|
* the current idle time were successfully obtained.
|
|
* NS_ERROR_FAILURE returned if the the requested
|
|
* idle service or the current idle were not obtained.
|
|
*/
|
|
static nsresult IsUserIdle(uint32_t aRequestedIdleTimeInMS, bool* aUserIsIdle);
|
|
|
|
/**
|
|
* Takes a selection, and a text control element (<input> or <textarea>), and
|
|
* returns the offsets in the text content corresponding to the selection.
|
|
* The selection's anchor and focus must both be in the root node passed or a
|
|
* descendant.
|
|
*
|
|
* @param aSelection Selection to check
|
|
* @param aRoot Root <input> or <textarea> element
|
|
* @param aOutStartOffset Output start offset
|
|
* @param aOutEndOffset Output end offset
|
|
*/
|
|
static void GetSelectionInTextControl(mozilla::Selection* aSelection,
|
|
Element* aRoot,
|
|
int32_t& aOutStartOffset,
|
|
int32_t& aOutEndOffset);
|
|
|
|
/**
|
|
* Takes a frame for anonymous content within a text control (<input> or
|
|
* <textarea>), and returns an offset in the text content, adjusted for a
|
|
* trailing <br> frame.
|
|
*
|
|
* @param aOffsetFrame Frame for the text content in which the offset
|
|
* lies
|
|
* @param aOffset Offset as calculated by GetContentOffsetsFromPoint
|
|
* @param aOutOffset Output adjusted offset
|
|
*
|
|
* @see GetSelectionInTextControl for the original basis of this function.
|
|
*/
|
|
static int32_t GetAdjustedOffsetInTextControl(nsIFrame* aOffsetFrame,
|
|
int32_t aOffset);
|
|
|
|
static nsIEditor* GetHTMLEditor(nsPresContext* aPresContext);
|
|
|
|
/**
|
|
* Check whether a spec feature/version is supported.
|
|
* @param aObject the object, which should support the feature,
|
|
* for example nsIDOMNode or nsIDOMDOMImplementation
|
|
* @param aFeature the feature ("Views", "Core", "HTML", "Range" ...)
|
|
* @param aVersion the version ("1.0", "2.0", ...)
|
|
* @return whether the feature is supported or not
|
|
*/
|
|
static bool InternalIsSupported(nsISupports* aObject,
|
|
const nsAString& aFeature,
|
|
const nsAString& aVersion);
|
|
|
|
private:
|
|
static bool InitializeEventTable();
|
|
|
|
static nsresult EnsureStringBundle(PropertiesFile aFile);
|
|
|
|
static bool CanCallerAccess(nsIPrincipal* aSubjectPrincipal,
|
|
nsIPrincipal* aPrincipal);
|
|
|
|
static nsresult WrapNative(JSContext *cx, JS::Handle<JSObject*> scope,
|
|
nsISupports *native, nsWrapperCache *cache,
|
|
const nsIID* aIID, JS::Value *vp,
|
|
nsIXPConnectJSObjectHolder** aHolder,
|
|
bool aAllowWrapping);
|
|
|
|
static nsresult DispatchEvent(nsIDocument* aDoc,
|
|
nsISupports* aTarget,
|
|
const nsAString& aEventName,
|
|
bool aCanBubble,
|
|
bool aCancelable,
|
|
bool aTrusted,
|
|
bool *aDefaultAction = nullptr);
|
|
|
|
static void InitializeModifierStrings();
|
|
|
|
static void DropFragmentParsers();
|
|
|
|
static bool MatchClassNames(nsIContent* aContent, int32_t aNamespaceID,
|
|
nsIAtom* aAtom, void* aData);
|
|
static void DestroyClassNameArray(void* aData);
|
|
static void* AllocClassMatchingInfo(nsINode* aRootNode,
|
|
const nsString* aClasses);
|
|
|
|
static nsIDOMScriptObjectFactory *sDOMScriptObjectFactory;
|
|
|
|
static nsIXPConnect *sXPConnect;
|
|
|
|
static nsIScriptSecurityManager *sSecurityManager;
|
|
|
|
static nsIParserService *sParserService;
|
|
|
|
static nsINameSpaceManager *sNameSpaceManager;
|
|
|
|
static nsIIOService *sIOService;
|
|
|
|
static bool sImgLoaderInitialized;
|
|
static void InitImgLoader();
|
|
|
|
// The following four members are initialized lazily
|
|
static imgLoader* sImgLoader;
|
|
static imgLoader* sPrivateImgLoader;
|
|
static imgICache* sImgCache;
|
|
static imgICache* sPrivateImgCache;
|
|
|
|
static nsIConsoleService* sConsoleService;
|
|
|
|
static nsDataHashtable<nsISupportsHashKey, EventNameMapping>* sAtomEventTable;
|
|
static nsDataHashtable<nsStringHashKey, EventNameMapping>* sStringEventTable;
|
|
static nsCOMArray<nsIAtom>* sUserDefinedEvents;
|
|
|
|
static nsIStringBundleService* sStringBundleService;
|
|
static nsIStringBundle* sStringBundles[PropertiesFile_COUNT];
|
|
|
|
static nsIContentPolicy* sContentPolicyService;
|
|
static bool sTriedToGetContentPolicy;
|
|
|
|
static nsILineBreaker* sLineBreaker;
|
|
static nsIWordBreaker* sWordBreaker;
|
|
|
|
#ifdef IBMBIDI
|
|
static nsIBidiKeyboard* sBidiKeyboard;
|
|
#endif
|
|
|
|
static bool sInitialized;
|
|
static uint32_t sScriptBlockerCount;
|
|
#ifdef DEBUG
|
|
static uint32_t sDOMNodeRemovedSuppressCount;
|
|
#endif
|
|
static uint32_t sMicroTaskLevel;
|
|
// Not an nsCOMArray because removing elements from those is slower
|
|
static nsTArray< nsCOMPtr<nsIRunnable> >* sBlockedScriptRunners;
|
|
static uint32_t sRunnersCountAtFirstBlocker;
|
|
static uint32_t sScriptBlockerCountWhereRunnersPrevented;
|
|
|
|
static nsIInterfaceRequestor* sSameOriginChecker;
|
|
|
|
static bool sIsHandlingKeyBoardEvent;
|
|
static bool sAllowXULXBL_for_file;
|
|
static bool sIsFullScreenApiEnabled;
|
|
static bool sTrustedFullScreenOnly;
|
|
static bool sFullscreenApiIsContentOnly;
|
|
static uint32_t sHandlingInputTimeout;
|
|
static bool sIsIdleObserverAPIEnabled;
|
|
static bool sIsPerformanceTimingEnabled;
|
|
|
|
static nsHtml5StringParser* sHTMLFragmentParser;
|
|
static nsIParser* sXMLFragmentParser;
|
|
static nsIFragmentContentSink* sXMLFragmentSink;
|
|
|
|
/**
|
|
* True if there's a fragment parser activation on the stack.
|
|
*/
|
|
static bool sFragmentParsingActive;
|
|
|
|
static nsString* sShiftText;
|
|
static nsString* sControlText;
|
|
static nsString* sMetaText;
|
|
static nsString* sOSText;
|
|
static nsString* sAltText;
|
|
static nsString* sModifierSeparator;
|
|
};
|
|
|
|
typedef nsCharSeparatedTokenizerTemplate<nsContentUtils::IsHTMLWhitespace>
|
|
HTMLSplitOnSpacesTokenizer;
|
|
|
|
#define NS_HOLD_JS_OBJECTS(obj, clazz) \
|
|
nsContentUtils::HoldJSObjects(NS_CYCLE_COLLECTION_UPCAST(obj, clazz), \
|
|
NS_CYCLE_COLLECTION_PARTICIPANT(clazz))
|
|
|
|
#define NS_DROP_JS_OBJECTS(obj, clazz) \
|
|
nsContentUtils::DropJSObjects(NS_CYCLE_COLLECTION_UPCAST(obj, clazz))
|
|
|
|
|
|
class MOZ_STACK_CLASS nsAutoScriptBlocker {
|
|
public:
|
|
nsAutoScriptBlocker(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM) {
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
nsContentUtils::AddScriptBlocker();
|
|
}
|
|
~nsAutoScriptBlocker() {
|
|
nsContentUtils::RemoveScriptBlocker();
|
|
}
|
|
private:
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
};
|
|
|
|
class MOZ_STACK_CLASS nsAutoScriptBlockerSuppressNodeRemoved :
|
|
public nsAutoScriptBlocker {
|
|
public:
|
|
nsAutoScriptBlockerSuppressNodeRemoved() {
|
|
#ifdef DEBUG
|
|
++nsContentUtils::sDOMNodeRemovedSuppressCount;
|
|
#endif
|
|
}
|
|
~nsAutoScriptBlockerSuppressNodeRemoved() {
|
|
#ifdef DEBUG
|
|
--nsContentUtils::sDOMNodeRemovedSuppressCount;
|
|
#endif
|
|
}
|
|
};
|
|
|
|
class MOZ_STACK_CLASS nsAutoMicroTask
|
|
{
|
|
public:
|
|
nsAutoMicroTask()
|
|
{
|
|
nsContentUtils::EnterMicroTask();
|
|
}
|
|
~nsAutoMicroTask()
|
|
{
|
|
nsContentUtils::LeaveMicroTask();
|
|
}
|
|
};
|
|
|
|
#define NS_INTERFACE_MAP_ENTRY_TEAROFF(_interface, _allocator) \
|
|
if (aIID.Equals(NS_GET_IID(_interface))) { \
|
|
foundInterface = static_cast<_interface *>(_allocator); \
|
|
if (!foundInterface) { \
|
|
*aInstancePtr = nullptr; \
|
|
return NS_ERROR_OUT_OF_MEMORY; \
|
|
} \
|
|
} else
|
|
|
|
/*
|
|
* In the following helper macros we exploit the fact that the result of a
|
|
* series of additions will not be finite if any one of the operands in the
|
|
* series is not finite.
|
|
*/
|
|
#define NS_ENSURE_FINITE(f, rv) \
|
|
if (!NS_finite(f)) { \
|
|
return (rv); \
|
|
}
|
|
|
|
#define NS_ENSURE_FINITE2(f1, f2, rv) \
|
|
if (!NS_finite((f1)+(f2))) { \
|
|
return (rv); \
|
|
}
|
|
|
|
#define NS_ENSURE_FINITE4(f1, f2, f3, f4, rv) \
|
|
if (!NS_finite((f1)+(f2)+(f3)+(f4))) { \
|
|
return (rv); \
|
|
}
|
|
|
|
#define NS_ENSURE_FINITE5(f1, f2, f3, f4, f5, rv) \
|
|
if (!NS_finite((f1)+(f2)+(f3)+(f4)+(f5))) { \
|
|
return (rv); \
|
|
}
|
|
|
|
#define NS_ENSURE_FINITE6(f1, f2, f3, f4, f5, f6, rv) \
|
|
if (!NS_finite((f1)+(f2)+(f3)+(f4)+(f5)+(f6))) { \
|
|
return (rv); \
|
|
}
|
|
|
|
// Deletes a linked list iteratively to avoid blowing up the stack (bug 460444).
|
|
#define NS_CONTENT_DELETE_LIST_MEMBER(type_, ptr_, member_) \
|
|
{ \
|
|
type_ *cur = (ptr_)->member_; \
|
|
(ptr_)->member_ = nullptr; \
|
|
while (cur) { \
|
|
type_ *next = cur->member_; \
|
|
cur->member_ = nullptr; \
|
|
delete cur; \
|
|
cur = next; \
|
|
} \
|
|
}
|
|
|
|
class nsContentTypeParser {
|
|
public:
|
|
nsContentTypeParser(const nsAString& aString);
|
|
~nsContentTypeParser();
|
|
|
|
nsresult GetParameter(const char* aParameterName, nsAString& aResult);
|
|
nsresult GetType(nsAString& aResult)
|
|
{
|
|
return GetParameter(nullptr, aResult);
|
|
}
|
|
|
|
private:
|
|
NS_ConvertUTF16toUTF8 mString;
|
|
nsIMIMEHeaderParam* mService;
|
|
};
|
|
|
|
#endif /* nsContentUtils_h___ */
|