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gecko-dev/content/base/public/nsIDocument.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsIDocument_h___
#define nsIDocument_h___
#include "nsINode.h"
#include "nsStringGlue.h"
#include "nsIDocumentObserver.h" // for nsUpdateType
#include "nsCOMPtr.h"
#include "nsCOMArray.h"
#include "nsIURI.h"
#include "nsILoadGroup.h"
#include "nsCRT.h"
#include "mozFlushType.h"
#include "nsIAtom.h"
#include "nsCompatibility.h"
#include "nsTObserverArray.h"
#include "nsTHashtable.h"
#include "nsHashKeys.h"
#include "nsIVariant.h"
#include "nsIObserver.h"
#include "nsGkAtoms.h"
#include "nsAutoPtr.h"
#include "nsPIDOMWindow.h"
#include "nsSMILAnimationController.h"
#include "nsIScriptGlobalObject.h"
#include "nsIDocumentEncoder.h"
#include "nsIFrameRequestCallback.h"
#include "nsEventStates.h"
#include "nsIStructuredCloneContainer.h"
#include "nsILoadContext.h"
class nsIRequest;
class nsPIDOMWindow;
class nsIStreamListener;
class nsIBFCacheEntry;
class nsIContent;
class nsPresContext;
class nsIPresShell;
class nsIDocShell;
class nsStyleSet;
class nsIStyleSheet;
class nsIStyleRule;
class nsCSSStyleSheet;
class nsIViewManager;
class nsIDOMEvent;
class nsIDOMEventTarget;
class nsDeviceContext;
class nsIParser;
class nsIDOMNode;
class nsIDOMElement;
class nsIDOMDocumentFragment;
class nsILineBreaker;
class nsIWordBreaker;
class nsISelection;
class nsIChannel;
class nsIPrincipal;
class nsIDOMDocument;
class nsIDOMDocumentType;
class nsScriptLoader;
class nsIContentSink;
class nsHTMLStyleSheet;
class nsHTMLCSSStyleSheet;
class nsILayoutHistoryState;
class nsIVariant;
class nsIDOMUserDataHandler;
template<class E> class nsCOMArray;
class nsIDocumentObserver;
class nsBindingManager;
class nsIDOMNodeList;
class mozAutoSubtreeModified;
struct JSObject;
class nsFrameLoader;
class nsIBoxObject;
class imgIRequest;
class nsISHEntry;
class nsDOMNavigationTiming;
class nsWindowSizes;
class nsIObjectLoadingContent;
namespace mozilla {
namespace css {
class Loader;
} // namespace css
namespace dom {
class Link;
class Element;
} // namespace dom
} // namespace mozilla
#define NS_IDOCUMENT_IID \
{ 0xbd70ee06, 0x2a7d, 0x4258, \
{ 0x86, 0x4b, 0xbd, 0x28, 0xad, 0x9f, 0xd1, 0x41 } }
// Flag for AddStyleSheet().
#define NS_STYLESHEET_FROM_CATALOG (1 << 0)
// Enum for requesting a particular type of document when creating a doc
enum DocumentFlavor {
DocumentFlavorLegacyGuess, // compat with old code until made HTML5-compliant
DocumentFlavorHTML, // HTMLDocument with HTMLness bit set to true
DocumentFlavorSVG // SVGDocument
};
// Document states
// RTL locale: specific to the XUL localedir attribute
#define NS_DOCUMENT_STATE_RTL_LOCALE NS_DEFINE_EVENT_STATE_MACRO(0)
// Window activation status
#define NS_DOCUMENT_STATE_WINDOW_INACTIVE NS_DEFINE_EVENT_STATE_MACRO(1)
//----------------------------------------------------------------------
// Document interface. This is implemented by all document objects in
// Gecko.
class nsIDocument : public nsINode
{
public:
typedef mozilla::dom::Element Element;
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_IID)
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
#ifdef MOZILLA_INTERNAL_API
nsIDocument();
#endif
/**
* Let the document know that we're starting to load data into it.
* @param aCommand The parser command. Must not be null.
* XXXbz It's odd to have that here.
* @param aChannel The channel the data will come from. The channel must be
* able to report its Content-Type.
* @param aLoadGroup The loadgroup this document should use from now on.
* Note that the document might not be the only thing using
* this loadgroup.
* @param aContainer The container this document is in. This may be null.
* XXXbz maybe we should make it more explicit (eg make the
* container an nsIWebNavigation or nsIDocShell or
* something)?
* @param [out] aDocListener the listener to pump data from the channel into.
* Generally this will be the parser this document
* sets up, or some sort of data-handler for media
* documents.
* @param aReset whether the document should call Reset() on itself. If this
* is false, the document will NOT set its principal to the
* channel's owner, will not clear any event listeners that are
* already set on it, etc.
* @param aSink The content sink to use for the data. If this is null and
* the document needs a content sink, it will create one based
* on whatever it knows about the data it's going to load.
* This MUST be null if the underlying document is an HTML
* document. Even in the XML case, please don't add new calls
* with non-null sink.
*
* Once this has been called, the document will return false for
* MayStartLayout() until SetMayStartLayout(true) is called on it. Making
* sure this happens is the responsibility of the caller of
* StartDocumentLoad().
*/
virtual nsresult StartDocumentLoad(const char* aCommand,
nsIChannel* aChannel,
nsILoadGroup* aLoadGroup,
nsISupports* aContainer,
nsIStreamListener **aDocListener,
bool aReset,
nsIContentSink* aSink = nullptr) = 0;
virtual void StopDocumentLoad() = 0;
/**
* Signal that the document title may have changed
* (see nsDocument::GetTitle).
* @param aBoundTitleElement true if an HTML or SVG <title> element
* has just been bound to the document.
*/
virtual void NotifyPossibleTitleChange(bool aBoundTitleElement) = 0;
/**
* Return the URI for the document. May return null.
*
* The value returned corresponds to the "document's current address" in
* HTML5. As such, it may change over the lifetime of the document, for
* instance as a result of a call to pushState() or replaceState().
*/
nsIURI* GetDocumentURI() const
{
return mDocumentURI;
}
/**
* Return the original URI of the document. This is the same as the
* document's URI unless history.pushState() or replaceState() is invoked on
* the document.
*
* This method corresponds to the "document's address" in HTML5 and, once
* set, doesn't change over the lifetime of the document.
*/
nsIURI* GetOriginalURI() const
{
return mOriginalURI;
}
/**
* Set the URI for the document. This also sets the document's original URI,
* if it's null.
*/
virtual void SetDocumentURI(nsIURI* aURI) = 0;
/**
* Set the principal responsible for this document.
*/
virtual void SetPrincipal(nsIPrincipal *aPrincipal) = 0;
/**
* Return the LoadGroup for the document. May return null.
*/
already_AddRefed<nsILoadGroup> GetDocumentLoadGroup() const
{
nsILoadGroup *group = nullptr;
if (mDocumentLoadGroup)
CallQueryReferent(mDocumentLoadGroup.get(), &group);
return group;
}
/**
* Return the base URI for relative URIs in the document (the document uri
* unless it's overridden by SetBaseURI, HTML <base> tags, etc.). The
* returned URI could be null if there is no document URI.
*/
nsIURI* GetDocBaseURI() const
{
return mDocumentBaseURI ? mDocumentBaseURI : mDocumentURI;
}
virtual already_AddRefed<nsIURI> GetBaseURI() const
{
nsCOMPtr<nsIURI> uri = GetDocBaseURI();
return uri.forget();
}
virtual nsresult SetBaseURI(nsIURI* aURI) = 0;
/**
* Get/Set the base target of a link in a document.
*/
virtual void GetBaseTarget(nsAString &aBaseTarget) = 0;
void SetBaseTarget(const nsString& aBaseTarget) {
mBaseTarget = aBaseTarget;
}
/**
* Return a standard name for the document's character set.
*/
const nsCString& GetDocumentCharacterSet() const
{
return mCharacterSet;
}
/**
* Set the document's character encoding. |aCharSetID| should be canonical.
* That is, callers are responsible for the charset alias resolution.
*/
virtual void SetDocumentCharacterSet(const nsACString& aCharSetID) = 0;
PRInt32 GetDocumentCharacterSetSource() const
{
return mCharacterSetSource;
}
// This method MUST be called before SetDocumentCharacterSet if
// you're planning to call both.
void SetDocumentCharacterSetSource(PRInt32 aCharsetSource)
{
mCharacterSetSource = aCharsetSource;
}
/**
* Add an observer that gets notified whenever the charset changes.
*/
virtual nsresult AddCharSetObserver(nsIObserver* aObserver) = 0;
/**
* Remove a charset observer.
*/
virtual void RemoveCharSetObserver(nsIObserver* aObserver) = 0;
/**
* This gets fired when the element that an id refers to changes.
* This fires at difficult times. It is generally not safe to do anything
* which could modify the DOM in any way. Use
* nsContentUtils::AddScriptRunner.
* @return true to keep the callback in the callback set, false
* to remove it.
*/
typedef bool (* IDTargetObserver)(Element* aOldElement,
Element* aNewelement, void* aData);
/**
* Add an IDTargetObserver for a specific ID. The IDTargetObserver
* will be fired whenever the content associated with the ID changes
* in the future. If aForImage is true, mozSetImageElement can override
* what content is associated with the ID. In that case the IDTargetObserver
* will be notified at those times when the result of LookupImageElement
* changes.
* At most one (aObserver, aData, aForImage) triple can be
* registered for each ID.
* @return the content currently associated with the ID.
*/
virtual Element* AddIDTargetObserver(nsIAtom* aID, IDTargetObserver aObserver,
void* aData, bool aForImage) = 0;
/**
* Remove the (aObserver, aData, aForImage) triple for a specific ID, if
* registered.
*/
virtual void RemoveIDTargetObserver(nsIAtom* aID, IDTargetObserver aObserver,
void* aData, bool aForImage) = 0;
/**
* Get the Content-Type of this document.
* (This will always return NS_OK, but has this signature to be compatible
* with nsIDOMDocument::GetContentType())
*/
NS_IMETHOD GetContentType(nsAString& aContentType) = 0;
/**
* Set the Content-Type of this document.
*/
virtual void SetContentType(const nsAString& aContentType) = 0;
/**
* Return the language of this document.
*/
void GetContentLanguage(nsAString& aContentLanguage) const
{
CopyASCIItoUTF16(mContentLanguage, aContentLanguage);
}
// The states BidiEnabled and MathMLEnabled should persist across multiple views
// (screen, print) of the same document.
/**
* Check if the document contains bidi data.
* If so, we have to apply the Unicode Bidi Algorithm.
*/
bool GetBidiEnabled() const
{
return mBidiEnabled;
}
/**
* Indicate the document contains bidi data.
* Currently, we cannot disable bidi, because once bidi is enabled,
* it affects a frame model irreversibly, and plays even though
* the document no longer contains bidi data.
*/
void SetBidiEnabled()
{
mBidiEnabled = true;
}
/**
* Check if the document contains (or has contained) any MathML elements.
*/
bool GetMathMLEnabled() const
{
return mMathMLEnabled;
}
void SetMathMLEnabled()
{
mMathMLEnabled = true;
}
/**
* Ask this document whether it's the initial document in its window.
*/
bool IsInitialDocument() const
{
return mIsInitialDocumentInWindow;
}
/**
* Tell this document that it's the initial document in its window. See
* comments on mIsInitialDocumentInWindow for when this should be called.
*/
void SetIsInitialDocument(bool aIsInitialDocument)
{
mIsInitialDocumentInWindow = aIsInitialDocument;
}
/**
* Get the bidi options for this document.
* @see nsBidiUtils.h
*/
PRUint32 GetBidiOptions() const
{
return mBidiOptions;
}
/**
* Set the bidi options for this document. This just sets the bits;
* callers are expected to take action as needed if they want this
* change to actually change anything immediately.
* @see nsBidiUtils.h
*/
void SetBidiOptions(PRUint32 aBidiOptions)
{
mBidiOptions = aBidiOptions;
}
/**
* Access HTTP header data (this may also get set from other
* sources, like HTML META tags).
*/
virtual void GetHeaderData(nsIAtom* aHeaderField, nsAString& aData) const = 0;
virtual void SetHeaderData(nsIAtom* aheaderField, const nsAString& aData) = 0;
/**
* Create a new presentation shell that will use aContext for its
* presentation context (presentation contexts <b>must not</b> be
* shared among multiple presentation shells). The caller of this
* method is responsible for calling BeginObservingDocument() on the
* presshell if the presshell should observe document mutations.
*/
virtual nsresult CreateShell(nsPresContext* aContext,
nsIViewManager* aViewManager,
nsStyleSet* aStyleSet,
nsIPresShell** aInstancePtrResult) = 0;
virtual void DeleteShell() = 0;
nsIPresShell* GetShell() const
{
return GetBFCacheEntry() ? nullptr : mPresShell;
}
void SetBFCacheEntry(nsIBFCacheEntry* aEntry)
{
mBFCacheEntry = aEntry;
}
nsIBFCacheEntry* GetBFCacheEntry() const
{
return mBFCacheEntry;
}
/**
* Return the parent document of this document. Will return null
* unless this document is within a compound document and has a
* parent. Note that this parent chain may cross chrome boundaries.
*/
nsIDocument *GetParentDocument() const
{
return mParentDocument;
}
/**
* Set the parent document of this document.
*/
void SetParentDocument(nsIDocument* aParent)
{
mParentDocument = aParent;
}
/**
* Set the sub document for aContent to aSubDoc.
*/
virtual nsresult SetSubDocumentFor(Element* aContent,
nsIDocument* aSubDoc) = 0;
/**
* Get the sub document for aContent
*/
virtual nsIDocument *GetSubDocumentFor(nsIContent *aContent) const = 0;
/**
* Find the content node for which aDocument is a sub document.
*/
virtual Element* FindContentForSubDocument(nsIDocument* aDocument) const = 0;
/**
* Return the doctype for this document.
*/
nsIContent* GetDocumentType() const;
/**
* Return the root element for this document.
*/
Element* GetRootElement() const;
protected:
virtual Element *GetRootElementInternal() const = 0;
public:
// Get the root <html> element, or return null if there isn't one (e.g.
// if the root isn't <html>)
Element* GetHtmlElement();
// Returns the first child of GetHtmlContent which has the given tag,
// or nullptr if that doesn't exist.
Element* GetHtmlChildElement(nsIAtom* aTag);
// Get the canonical <body> element, or return null if there isn't one (e.g.
// if the root isn't <html> or if the <body> isn't there)
Element* GetBodyElement() {
return GetHtmlChildElement(nsGkAtoms::body);
}
// Get the canonical <head> element, or return null if there isn't one (e.g.
// if the root isn't <html> or if the <head> isn't there)
Element* GetHeadElement() {
return GetHtmlChildElement(nsGkAtoms::head);
}
/**
* Accessors to the collection of stylesheets owned by this document.
* Style sheets are ordered, most significant last.
*/
/**
* Get the number of stylesheets
*
* @return the number of stylesheets
* @throws no exceptions
*/
virtual PRInt32 GetNumberOfStyleSheets() const = 0;
/**
* Get a particular stylesheet
* @param aIndex the index the stylesheet lives at. This is zero-based
* @return the stylesheet at aIndex. Null if aIndex is out of range.
* @throws no exceptions
*/
virtual nsIStyleSheet* GetStyleSheetAt(PRInt32 aIndex) const = 0;
/**
* Insert a sheet at a particular spot in the stylesheet list (zero-based)
* @param aSheet the sheet to insert
* @param aIndex the index to insert at. This index will be
* adjusted for the "special" sheets.
* @throws no exceptions
*/
virtual void InsertStyleSheetAt(nsIStyleSheet* aSheet, PRInt32 aIndex) = 0;
/**
* Get the index of a particular stylesheet. This will _always_
* consider the "special" sheets as part of the sheet list.
* @param aSheet the sheet to get the index of
* @return aIndex the index of the sheet in the full list
*/
virtual PRInt32 GetIndexOfStyleSheet(nsIStyleSheet* aSheet) const = 0;
/**
* Replace the stylesheets in aOldSheets with the stylesheets in
* aNewSheets. The two lists must have equal length, and the sheet
* at positon J in the first list will be replaced by the sheet at
* position J in the second list. Some sheets in the second list
* may be null; if so the corresponding sheets in the first list
* will simply be removed.
*/
virtual void UpdateStyleSheets(nsCOMArray<nsIStyleSheet>& aOldSheets,
nsCOMArray<nsIStyleSheet>& aNewSheets) = 0;
/**
* Add a stylesheet to the document
*/
virtual void AddStyleSheet(nsIStyleSheet* aSheet) = 0;
/**
* Remove a stylesheet from the document
*/
virtual void RemoveStyleSheet(nsIStyleSheet* aSheet) = 0;
/**
* Notify the document that the applicable state of the sheet changed
* and that observers should be notified and style sets updated
*/
virtual void SetStyleSheetApplicableState(nsIStyleSheet* aSheet,
bool aApplicable) = 0;
/**
* Just like the style sheet API, but for "catalog" sheets,
* extra sheets inserted at the UA level.
*/
virtual PRInt32 GetNumberOfCatalogStyleSheets() const = 0;
virtual nsIStyleSheet* GetCatalogStyleSheetAt(PRInt32 aIndex) const = 0;
virtual void AddCatalogStyleSheet(nsIStyleSheet* aSheet) = 0;
virtual void EnsureCatalogStyleSheet(const char *aStyleSheetURI) = 0;
/**
* Get this document's CSSLoader. This is guaranteed to not return null.
*/
mozilla::css::Loader* CSSLoader() const {
return mCSSLoader;
}
/**
* Get the channel that was passed to StartDocumentLoad or Reset for this
* document. Note that this may be null in some cases (eg if
* StartDocumentLoad or Reset were never called)
*/
virtual nsIChannel* GetChannel() const = 0;
/**
* Get this document's attribute stylesheet. May return null if
* there isn't one.
*/
nsHTMLStyleSheet* GetAttributeStyleSheet() const {
return mAttrStyleSheet;
}
/**
* Get this document's inline style sheet. May return null if there
* isn't one
*/
virtual nsHTMLCSSStyleSheet* GetInlineStyleSheet() const = 0;
/**
* Get/set the object from which a document can get a script context
* and scope. This is the context within which all scripts (during
* document creation and during event handling) will run. Note that
* this is the *inner* window object.
*/
virtual nsIScriptGlobalObject* GetScriptGlobalObject() const = 0;
virtual void SetScriptGlobalObject(nsIScriptGlobalObject* aGlobalObject) = 0;
/**
* Get/set the object from which the context for the event/script handling can
* be got. Normally GetScriptHandlingObject() returns the same object as
* GetScriptGlobalObject(), but if the document is loaded as data,
* non-null may be returned, even if GetScriptGlobalObject() returns null.
* aHasHadScriptHandlingObject is set true if document has had the object
* for event/script handling. Do not process any events/script if the method
* returns null, but aHasHadScriptHandlingObject is true.
*/
nsIScriptGlobalObject*
GetScriptHandlingObject(bool& aHasHadScriptHandlingObject) const
{
aHasHadScriptHandlingObject = mHasHadScriptHandlingObject;
return mScriptGlobalObject ? mScriptGlobalObject.get() :
GetScriptHandlingObjectInternal();
}
virtual void SetScriptHandlingObject(nsIScriptGlobalObject* aScriptObject) = 0;
/**
* Get the object that is used as the scope for all of the content
* wrappers whose owner document is this document. Unlike the script global
* object, this will only return null when the global object for this
* document is truly gone. Use this object when you're trying to find a
* content wrapper in XPConnect.
*/
virtual nsIScriptGlobalObject* GetScopeObject() = 0;
/**
* Return the window containing the document (the outer window).
*/
nsPIDOMWindow *GetWindow() const
{
return mWindow ? mWindow->GetOuterWindow() : GetWindowInternal();
}
bool IsInBackgroundWindow() const
{
nsPIDOMWindow* outer = mWindow ? mWindow->GetOuterWindow() : nullptr;
return outer && outer->IsBackground();
}
/**
* Return the inner window used as the script compilation scope for
* this document. If you're not absolutely sure you need this, use
* GetWindow().
*/
nsPIDOMWindow* GetInnerWindow()
{
return mRemovedFromDocShell ? GetInnerWindowInternal() : mWindow;
}
/**
* Return the outer window ID.
*/
PRUint64 OuterWindowID() const
{
nsPIDOMWindow *window = GetWindow();
return window ? window->WindowID() : 0;
}
/**
* Return the inner window ID.
*/
PRUint64 InnerWindowID()
{
nsPIDOMWindow *window = GetInnerWindow();
return window ? window->WindowID() : 0;
}
/**
* Get the script loader for this document
*/
virtual nsScriptLoader* ScriptLoader() = 0;
/**
* Add/Remove an element to the document's id and name hashes
*/
virtual void AddToIdTable(Element* aElement, nsIAtom* aId) = 0;
virtual void RemoveFromIdTable(Element* aElement, nsIAtom* aId) = 0;
virtual void AddToNameTable(Element* aElement, nsIAtom* aName) = 0;
virtual void RemoveFromNameTable(Element* aElement, nsIAtom* aName) = 0;
/**
* Returns the element which either requested DOM full-screen mode, or
* contains the element which requested DOM full-screen mode if the
* requestee is in a subdocument. Note this element must be *in*
* this document.
*/
virtual Element* GetFullScreenElement() = 0;
/**
* Asynchronously requests that the document make aElement the full-screen
* element, and move into full-screen mode. The current full-screen element
* (if any) is pushed onto the full-screen element stack, and it can be
* returned to full-screen status by calling RestorePreviousFullScreenState().
*/
virtual void AsyncRequestFullScreen(Element* aElement) = 0;
/**
* Called when a frame in a child process has entered fullscreen or when a
* fullscreen frame in a child process changes to another origin.
* aFrameElement is the frame element which contains the child-process
* fullscreen document, and aNewOrigin is the origin of the new fullscreen
* document.
*/
virtual nsresult RemoteFrameFullscreenChanged(nsIDOMElement* aFrameElement,
const nsAString& aNewOrigin) = 0;
/**
* Called when a frame in a remote child document has rolled back fullscreen
* so that all its fullscreen element stacks are empty; we must continue the
* rollback in this parent process' doc tree branch which is fullscreen.
* Note that only one branch of the document tree can have its documents in
* fullscreen state at one time. We're in inconsistent state if the a
* fullscreen document has a parent and that parent isn't fullscreen. We
* preserve this property across process boundaries.
*/
virtual nsresult RemoteFrameFullscreenReverted() = 0;
/**
* Restores the previous full-screen element to full-screen status. If there
* is no former full-screen element, this exits full-screen, moving the
* top-level browser window out of full-screen mode.
*/
virtual void RestorePreviousFullScreenState() = 0;
/**
* Returns true if this document is in full-screen mode.
*/
virtual bool IsFullScreenDoc() = 0;
/**
* Sets whether this document is approved for fullscreen mode.
* Documents aren't approved for fullscreen until chrome has sent a
* "fullscreen-approved" notification with a subject which is a pointer
* to the approved document.
*/
virtual void SetApprovedForFullscreen(bool aIsApproved) = 0;
/**
* Exits all documents from DOM full-screen mode, and moves the top-level
* browser window out of full-screen mode. If aRunAsync is true, this runs
* asynchronously.
*/
static void ExitFullScreen(bool aRunAsync);
virtual void RequestPointerLock(Element* aElement) = 0;
static void UnlockPointer();
//----------------------------------------------------------------------
// Document notification API's
/**
* Add a new observer of document change notifications. Whenever
* content is changed, appended, inserted or removed the observers are
* informed. An observer that is already observing the document must
* not be added without being removed first.
*/
virtual void AddObserver(nsIDocumentObserver* aObserver) = 0;
/**
* Remove an observer of document change notifications. This will
* return false if the observer cannot be found.
*/
virtual bool RemoveObserver(nsIDocumentObserver* aObserver) = 0;
// Observation hooks used to propagate notifications to document observers.
// BeginUpdate must be called before any batch of modifications of the
// content model or of style data, EndUpdate must be called afterward.
// To make this easy and painless, use the mozAutoDocUpdate helper class.
virtual void BeginUpdate(nsUpdateType aUpdateType) = 0;
virtual void EndUpdate(nsUpdateType aUpdateType) = 0;
virtual void BeginLoad() = 0;
virtual void EndLoad() = 0;
enum ReadyState { READYSTATE_UNINITIALIZED = 0, READYSTATE_LOADING = 1, READYSTATE_INTERACTIVE = 3, READYSTATE_COMPLETE = 4};
virtual void SetReadyStateInternal(ReadyState rs) = 0;
virtual ReadyState GetReadyStateEnum() = 0;
// notify that a content node changed state. This must happen under
// a scriptblocker but NOT within a begin/end update.
virtual void ContentStateChanged(nsIContent* aContent,
nsEventStates aStateMask) = 0;
// Notify that a document state has changed.
// This should only be called by callers whose state is also reflected in the
// implementation of nsDocument::GetDocumentState.
virtual void DocumentStatesChanged(nsEventStates aStateMask) = 0;
// Observation hooks for style data to propagate notifications
// to document observers
virtual void StyleRuleChanged(nsIStyleSheet* aStyleSheet,
nsIStyleRule* aOldStyleRule,
nsIStyleRule* aNewStyleRule) = 0;
virtual void StyleRuleAdded(nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule) = 0;
virtual void StyleRuleRemoved(nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule) = 0;
/**
* Flush notifications for this document and its parent documents
* (since those may affect the layout of this one).
*/
virtual void FlushPendingNotifications(mozFlushType aType) = 0;
/**
* Calls FlushPendingNotifications on any external resources this document
* has. If this document has no external resources or is an external resource
* itself this does nothing. This should only be called with
* aType >= Flush_Style.
*/
virtual void FlushExternalResources(mozFlushType aType) = 0;
nsBindingManager* BindingManager() const
{
return mNodeInfoManager->GetBindingManager();
}
/**
* Only to be used inside Gecko, you can't really do anything with the
* pointer outside Gecko anyway.
*/
nsNodeInfoManager* NodeInfoManager() const
{
return mNodeInfoManager;
}
/**
* Reset the document using the given channel and loadgroup. This works
* like ResetToURI, but also sets the document's channel to aChannel.
* The principal of the document will be set from the channel.
*/
virtual void Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup) = 0;
/**
* Reset this document to aURI, aLoadGroup, and aPrincipal. aURI must not be
* null. If aPrincipal is null, a codebase principal based on aURI will be
* used.
*/
virtual void ResetToURI(nsIURI *aURI, nsILoadGroup* aLoadGroup,
nsIPrincipal* aPrincipal) = 0;
/**
* Set the container (docshell) for this document. Virtual so that
* docshell can call it.
*/
virtual void SetContainer(nsISupports *aContainer);
/**
* Get the container (docshell) for this document.
*/
already_AddRefed<nsISupports> GetContainer() const
{
nsISupports* container = nullptr;
if (mDocumentContainer)
CallQueryReferent(mDocumentContainer.get(), &container);
return container;
}
/**
* Get the container's load context for this document.
*/
nsILoadContext* GetLoadContext() const
{
nsCOMPtr<nsISupports> container = GetContainer();
if (container) {
nsCOMPtr<nsILoadContext> loadContext = do_QueryInterface(container);
return loadContext;
}
return nullptr;
}
/**
* Set and get XML declaration. If aVersion is null there is no declaration.
* aStandalone takes values -1, 0 and 1 indicating respectively that there
* was no standalone parameter in the declaration, that it was given as no,
* or that it was given as yes.
*/
virtual void SetXMLDeclaration(const PRUnichar *aVersion,
const PRUnichar *aEncoding,
const PRInt32 aStandalone) = 0;
virtual void GetXMLDeclaration(nsAString& aVersion,
nsAString& aEncoding,
nsAString& Standalone) = 0;
bool IsHTML() const
{
return mIsRegularHTML;
}
bool IsXUL() const
{
return mIsXUL;
}
virtual bool IsScriptEnabled() = 0;
virtual void AddXMLEventsContent(nsIContent * aXMLEventsElement) = 0;
/**
* Create an element with the specified name, prefix and namespace ID.
*/
virtual nsresult CreateElem(const nsAString& aName, nsIAtom *aPrefix,
PRInt32 aNamespaceID,
nsIContent** aResult) = 0;
/**
* Get the security info (i.e. SSL state etc) that the document got
* from the channel/document that created the content of the
* document.
*
* @see nsIChannel
*/
nsISupports *GetSecurityInfo()
{
return mSecurityInfo;
}
/**
* Returns the default namespace ID used for elements created in this
* document.
*/
PRInt32 GetDefaultNamespaceID() const
{
return mDefaultElementType;
}
void DeleteAllProperties();
void DeleteAllPropertiesFor(nsINode* aNode);
nsPropertyTable* PropertyTable(PRUint16 aCategory) {
if (aCategory == 0)
return &mPropertyTable;
return GetExtraPropertyTable(aCategory);
}
PRUint32 GetPropertyTableCount()
{ return mExtraPropertyTables.Length() + 1; }
/**
* Sets the ID used to identify this part of the multipart document
*/
void SetPartID(PRUint32 aID) {
mPartID = aID;
}
/**
* Return the ID used to identify this part of the multipart document
*/
PRUint32 GetPartID() const {
return mPartID;
}
/**
* Sanitize the document by resetting all input elements and forms that have
* autocomplete=off to their default values.
*/
virtual nsresult Sanitize() = 0;
/**
* Enumerate all subdocuments.
* The enumerator callback should return true to continue enumerating, or
* false to stop. This will never get passed a null aDocument.
*/
typedef bool (*nsSubDocEnumFunc)(nsIDocument *aDocument, void *aData);
virtual void EnumerateSubDocuments(nsSubDocEnumFunc aCallback,
void *aData) = 0;
/**
* Check whether it is safe to cache the presentation of this document
* and all of its subdocuments. This method checks the following conditions
* recursively:
* - Some document types, such as plugin documents, cannot be safely cached.
* - If there are any pending requests, we don't allow the presentation
* to be cached. Ideally these requests would be suspended and resumed,
* but that is difficult in some cases, such as XMLHttpRequest.
* - If there are any beforeunload or unload listeners, we must fire them
* for correctness, but this likely puts the document into a state where
* it would not function correctly if restored.
*
* |aNewRequest| should be the request for a new document which will
* replace this document in the docshell. The new document's request
* will be ignored when checking for active requests. If there is no
* request associated with the new document, this parameter may be null.
*/
virtual bool CanSavePresentation(nsIRequest *aNewRequest) = 0;
/**
* Notify the document that its associated ContentViewer is being destroyed.
* This releases circular references so that the document can go away.
* Destroy() is only called on documents that have a content viewer.
*/
virtual void Destroy() = 0;
/**
* Notify the document that its associated ContentViewer is no longer
* the current viewer for the docshell. The document might still
* be rendered in "zombie state" until the next document is ready.
* The document should save form control state.
*/
virtual void RemovedFromDocShell() = 0;
/**
* Get the layout history state that should be used to save and restore state
* for nodes in this document. This may return null; if that happens state
* saving and restoration is not possible.
*/
virtual already_AddRefed<nsILayoutHistoryState> GetLayoutHistoryState() const = 0;
/**
* Methods that can be used to prevent onload firing while an event that
* should block onload is posted. onload is guaranteed to not fire until
* either all calls to BlockOnload() have been matched by calls to
* UnblockOnload() or the load has been stopped altogether (by the user
* pressing the Stop button, say).
*/
virtual void BlockOnload() = 0;
/**
* @param aFireSync whether to fire onload synchronously. If false,
* onload will fire asynchronously after all onload blocks have been
* removed. It will NOT fire from inside UnblockOnload. If true,
* onload may fire from inside UnblockOnload.
*/
virtual void UnblockOnload(bool aFireSync) = 0;
/**
* Notification that the page has been shown, for documents which are loaded
* into a DOM window. This corresponds to the completion of document load,
* or to the page's presentation being restored into an existing DOM window.
* This notification fires applicable DOM events to the content window. See
* nsIDOMPageTransitionEvent.idl for a description of the |aPersisted|
* parameter. If aDispatchStartTarget is null, the pageshow event is
* dispatched on the ScriptGlobalObject for this document, otherwise it's
* dispatched on aDispatchStartTarget.
* Note: if aDispatchStartTarget isn't null, the showing state of the
* document won't be altered.
*/
virtual void OnPageShow(bool aPersisted,
nsIDOMEventTarget* aDispatchStartTarget) = 0;
/**
* Notification that the page has been hidden, for documents which are loaded
* into a DOM window. This corresponds to the unloading of the document, or
* to the document's presentation being saved but removed from an existing
* DOM window. This notification fires applicable DOM events to the content
* window. See nsIDOMPageTransitionEvent.idl for a description of the
* |aPersisted| parameter. If aDispatchStartTarget is null, the pagehide
* event is dispatched on the ScriptGlobalObject for this document,
* otherwise it's dispatched on aDispatchStartTarget.
* Note: if aDispatchStartTarget isn't null, the showing state of the
* document won't be altered.
*/
virtual void OnPageHide(bool aPersisted,
nsIDOMEventTarget* aDispatchStartTarget) = 0;
/*
* We record the set of links in the document that are relevant to
* style.
*/
/**
* Notification that an element is a link that is relevant to style.
*/
virtual void AddStyleRelevantLink(mozilla::dom::Link* aLink) = 0;
/**
* Notification that an element is a link and its URI might have been
* changed or the element removed. If the element is still a link relevant
* to style, then someone must ensure that AddStyleRelevantLink is
* (eventually) called on it again.
*/
virtual void ForgetLink(mozilla::dom::Link* aLink) = 0;
/**
* Resets and removes a box object from the document's box object cache
*
* @param aElement canonical nsIContent pointer of the box object's element
*/
virtual void ClearBoxObjectFor(nsIContent *aContent) = 0;
/**
* Get the box object for an element. This is not exposed through a
* scriptable interface except for XUL documents.
*/
NS_IMETHOD GetBoxObjectFor(nsIDOMElement* aElement, nsIBoxObject** aResult) = 0;
/**
* Get the compatibility mode for this document
*/
nsCompatibility GetCompatibilityMode() const {
return mCompatMode;
}
/**
* Check whether we've ever fired a DOMTitleChanged event for this
* document.
*/
bool HaveFiredDOMTitleChange() const {
return mHaveFiredTitleChange;
}
/**
* See GetXBLChildNodesFor on nsBindingManager
*/
virtual nsresult GetXBLChildNodesFor(nsIContent* aContent,
nsIDOMNodeList** aResult) = 0;
/**
* See GetContentListFor on nsBindingManager
*/
virtual nsresult GetContentListFor(nsIContent* aContent,
nsIDOMNodeList** aResult) = 0;
/**
* See GetAnonymousElementByAttribute on nsIDOMDocumentXBL.
*/
virtual nsIContent*
GetAnonymousElementByAttribute(nsIContent* aElement,
nsIAtom* aAttrName,
const nsAString& aAttrValue) const = 0;
/**
* Helper for nsIDOMDocument::elementFromPoint implementation that allows
* ignoring the scroll frame and/or avoiding layout flushes.
*
* @see nsIDOMWindowUtils::elementFromPoint
*/
virtual nsresult ElementFromPointHelper(float aX, float aY,
bool aIgnoreRootScrollFrame,
bool aFlushLayout,
nsIDOMElement** aReturn) = 0;
virtual nsresult NodesFromRectHelper(float aX, float aY,
float aTopSize, float aRightSize,
float aBottomSize, float aLeftSize,
bool aIgnoreRootScrollFrame,
bool aFlushLayout,
nsIDOMNodeList** aReturn) = 0;
/**
* See FlushSkinBindings on nsBindingManager
*/
virtual void FlushSkinBindings() = 0;
/**
* To batch DOMSubtreeModified, document needs to be informed when
* a mutation event might be dispatched, even if the event isn't actually
* created because there are no listeners for it.
*
* @param aTarget is the target for the mutation event.
*/
void MayDispatchMutationEvent(nsINode* aTarget)
{
if (mSubtreeModifiedDepth > 0) {
mSubtreeModifiedTargets.AppendObject(aTarget);
}
}
/**
* Marks as not-going-to-be-collected for the given generation of
* cycle collection.
*/
void MarkUncollectableForCCGeneration(PRUint32 aGeneration)
{
mMarkedCCGeneration = aGeneration;
}
/**
* Gets the cycle collector generation this document is marked for.
*/
PRUint32 GetMarkedCCGeneration()
{
return mMarkedCCGeneration;
}
bool IsLoadedAsData()
{
return mLoadedAsData;
}
bool IsLoadedAsInteractiveData()
{
return mLoadedAsInteractiveData;
}
bool MayStartLayout()
{
return mMayStartLayout;
}
void SetMayStartLayout(bool aMayStartLayout)
{
mMayStartLayout = aMayStartLayout;
}
already_AddRefed<nsIDocumentEncoder> GetCachedEncoder()
{
return mCachedEncoder.forget();
}
void SetCachedEncoder(already_AddRefed<nsIDocumentEncoder> aEncoder)
{
mCachedEncoder = aEncoder;
}
// In case of failure, the document really can't initialize the frame loader.
virtual nsresult InitializeFrameLoader(nsFrameLoader* aLoader) = 0;
// In case of failure, the caller must handle the error, for example by
// finalizing frame loader asynchronously.
virtual nsresult FinalizeFrameLoader(nsFrameLoader* aLoader) = 0;
// Removes the frame loader of aShell from the initialization list.
virtual void TryCancelFrameLoaderInitialization(nsIDocShell* aShell) = 0;
// Returns true if the frame loader of aShell is in the finalization list.
virtual bool FrameLoaderScheduledToBeFinalized(nsIDocShell* aShell) = 0;
/**
* Check whether this document is a root document that is not an
* external resource.
*/
bool IsRootDisplayDocument() const
{
return !mParentDocument && !mDisplayDocument;
}
bool IsBeingUsedAsImage() const {
return mIsBeingUsedAsImage;
}
void SetIsBeingUsedAsImage() {
mIsBeingUsedAsImage = true;
}
bool IsResourceDoc() const {
return IsBeingUsedAsImage() || // Are we a helper-doc for an SVG image?
!!mDisplayDocument; // Are we an external resource doc?
}
/**
* Get the document for which this document is an external resource. This
* will be null if this document is not an external resource. Otherwise,
* GetDisplayDocument() will return a non-null document, and
* GetDisplayDocument()->GetDisplayDocument() is guaranteed to be null.
*/
nsIDocument* GetDisplayDocument() const
{
return mDisplayDocument;
}
/**
* Set the display document for this document. aDisplayDocument must not be
* null.
*/
void SetDisplayDocument(nsIDocument* aDisplayDocument)
{
NS_PRECONDITION(!GetShell() &&
!nsCOMPtr<nsISupports>(GetContainer()) &&
!GetWindow() &&
!GetScriptGlobalObject(),
"Shouldn't set mDisplayDocument on documents that already "
"have a presentation or a docshell or a window");
NS_PRECONDITION(aDisplayDocument != this, "Should be different document");
NS_PRECONDITION(!aDisplayDocument->GetDisplayDocument(),
"Display documents should not nest");
mDisplayDocument = aDisplayDocument;
}
/**
* A class that represents an external resource load that has begun but
* doesn't have a document yet. Observers can be registered on this object,
* and will be notified after the document is created. Observers registered
* after the document has been created will NOT be notified. When observers
* are notified, the subject will be the newly-created document, the topic
* will be "external-resource-document-created", and the data will be null.
* If document creation fails for some reason, observers will still be
* notified, with a null document pointer.
*/
class ExternalResourceLoad : public nsISupports
{
public:
virtual ~ExternalResourceLoad() {}
void AddObserver(nsIObserver* aObserver) {
NS_PRECONDITION(aObserver, "Must have observer");
mObservers.AppendElement(aObserver);
}
const nsTArray< nsCOMPtr<nsIObserver> > & Observers() {
return mObservers;
}
protected:
nsAutoTArray< nsCOMPtr<nsIObserver>, 8 > mObservers;
};
/**
* Request an external resource document for aURI. This will return the
* resource document if available. If one is not available yet, it will
* start loading as needed, and the pending load object will be returned in
* aPendingLoad so that the caller can register an observer to wait for the
* load. If this function returns null and doesn't return a pending load,
* that means that there is no resource document for this URI and won't be
* one in the future.
*
* @param aURI the URI to get
* @param aRequestingNode the node making the request
* @param aPendingLoad the pending load for this request, if any
*/
virtual nsIDocument*
RequestExternalResource(nsIURI* aURI,
nsINode* aRequestingNode,
ExternalResourceLoad** aPendingLoad) = 0;
/**
* Enumerate the external resource documents associated with this document.
* The enumerator callback should return true to continue enumerating, or
* false to stop. This callback will never get passed a null aDocument.
*/
virtual void EnumerateExternalResources(nsSubDocEnumFunc aCallback,
void* aData) = 0;
/**
* Return whether the document is currently showing (in the sense of
* OnPageShow() having been called already and OnPageHide() not having been
* called yet.
*/
bool IsShowing() const { return mIsShowing; }
/**
* Return whether the document is currently visible (in the sense of
* OnPageHide having been called and OnPageShow not yet having been called)
*/
bool IsVisible() const { return mVisible; }
/**
* Return true when this document is active, i.e., the active document
* in a content viewer.
*/
bool IsActive() const { return mDocumentContainer && !mRemovedFromDocShell; }
void RegisterFreezableElement(nsIContent* aContent);
bool UnregisterFreezableElement(nsIContent* aContent);
typedef void (* FreezableElementEnumerator)(nsIContent*, void*);
void EnumerateFreezableElements(FreezableElementEnumerator aEnumerator,
void* aData);
// Indicates whether mAnimationController has been (lazily) initialized.
// If this returns true, we're promising that GetAnimationController()
// will have a non-null return value.
bool HasAnimationController() { return !!mAnimationController; }
// Getter for this document's SMIL Animation Controller. Performs lazy
// initialization, if this document supports animation and if
// mAnimationController isn't yet initialized.
virtual nsSMILAnimationController* GetAnimationController() = 0;
// Makes the images on this document capable of having their animation
// active or suspended. An Image will animate as long as at least one of its
// owning Documents needs it to animate; otherwise it can suspend.
virtual void SetImagesNeedAnimating(bool aAnimating) = 0;
/**
* Prevents user initiated events from being dispatched to the document and
* subdocuments.
*/
virtual void SuppressEventHandling(PRUint32 aIncrease = 1) = 0;
/**
* Unsuppress event handling.
* @param aFireEvents If true, delayed events (focus/blur) will be fired
* asynchronously.
*/
virtual void UnsuppressEventHandlingAndFireEvents(bool aFireEvents) = 0;
PRUint32 EventHandlingSuppressed() const { return mEventsSuppressed; }
bool IsEventHandlingEnabled() {
return !EventHandlingSuppressed() && mScriptGlobalObject;
}
/**
* Increment the number of external scripts being evaluated.
*/
void BeginEvaluatingExternalScript() { ++mExternalScriptsBeingEvaluated; }
/**
* Decrement the number of external scripts being evaluated.
*/
void EndEvaluatingExternalScript() { --mExternalScriptsBeingEvaluated; }
bool IsDNSPrefetchAllowed() const { return mAllowDNSPrefetch; }
/**
* Returns true if this document is allowed to contain XUL element and
* use non-builtin XBL bindings.
*/
bool AllowXULXBL() {
return mAllowXULXBL == eTriTrue ? true :
mAllowXULXBL == eTriFalse ? false :
InternalAllowXULXBL();
}
void ForceEnableXULXBL() {
mAllowXULXBL = eTriTrue;
}
/**
* true when this document is a static clone of a normal document.
* For example print preview and printing use static documents.
*/
bool IsStaticDocument() { return mIsStaticDocument; }
/**
* Clones the document and subdocuments and stylesheet etc.
* @param aCloneContainer The container for the clone document.
*/
virtual already_AddRefed<nsIDocument>
CreateStaticClone(nsISupports* aCloneContainer);
/**
* If this document is a static clone, this returns the original
* document.
*/
nsIDocument* GetOriginalDocument()
{
MOZ_ASSERT(!mOriginalDocument || !mOriginalDocument->GetOriginalDocument());
return mOriginalDocument;
}
/**
* Called by nsParser to preload images. Can be removed and code moved
* to nsPreloadURIs::PreloadURIs() in file nsParser.cpp whenever the
* parser-module is linked with gklayout-module. aCrossOriginAttr should
* be a void string if the attr is not present.
*/
virtual void MaybePreLoadImage(nsIURI* uri,
const nsAString& aCrossOriginAttr) = 0;
/**
* Called by nsParser to preload style sheets. Can also be merged into
* the parser if and when the parser is merged with libgklayout.
*/
virtual void PreloadStyle(nsIURI* aURI, const nsAString& aCharset) = 0;
/**
* Called by the chrome registry to load style sheets. Can be put
* back there if and when when that module is merged with libgklayout.
*
* This always does a synchronous load. If aIsAgentSheet is true,
* it also uses the system principal and enables unsafe rules.
* DO NOT USE FOR UNTRUSTED CONTENT.
*/
virtual nsresult LoadChromeSheetSync(nsIURI* aURI, bool aIsAgentSheet,
nsCSSStyleSheet** aSheet) = 0;
/**
* Returns true if the locale used for the document specifies a direction of
* right to left. For chrome documents, this comes from the chrome registry.
* This is used to determine the current state for the :-moz-locale-dir pseudoclass
* so once can know whether a document is expected to be rendered left-to-right
* or right-to-left.
*/
virtual bool IsDocumentRightToLeft() { return false; }
enum DocumentTheme {
Doc_Theme_Uninitialized, // not determined yet
Doc_Theme_None,
Doc_Theme_Neutral,
Doc_Theme_Dark,
Doc_Theme_Bright
};
/**
* Set the document's pending state object (as serialized using structured
* clone).
*/
void SetStateObject(nsIStructuredCloneContainer *scContainer)
{
mStateObjectContainer = scContainer;
mStateObjectCached = nullptr;
}
/**
* Returns Doc_Theme_None if there is no lightweight theme specified,
* Doc_Theme_Dark for a dark theme, Doc_Theme_Bright for a light theme, and
* Doc_Theme_Neutral for any other theme. This is used to determine the state
* of the pseudoclasses :-moz-lwtheme and :-moz-lwtheme-text.
*/
virtual int GetDocumentLWTheme() { return Doc_Theme_None; }
/**
* Returns the document state.
* Document state bits have the form NS_DOCUMENT_STATE_* and are declared in
* nsIDocument.h.
*/
virtual nsEventStates GetDocumentState() = 0;
virtual nsISupports* GetCurrentContentSink() = 0;
/**
* Register/Unregister a filedata uri as being "owned" by this document.
* I.e. that its lifetime is connected with this document. When the document
* goes away it should "kill" the uri by calling
* nsBlobProtocolHandler::RemoveFileDataEntry
*/
virtual void RegisterFileDataUri(const nsACString& aUri) = 0;
virtual void UnregisterFileDataUri(const nsACString& aUri) = 0;
virtual void SetScrollToRef(nsIURI *aDocumentURI) = 0;
virtual void ScrollToRef() = 0;
virtual void ResetScrolledToRefAlready() = 0;
virtual void SetChangeScrollPosWhenScrollingToRef(bool aValue) = 0;
/**
* This method is similar to GetElementById() from nsIDOMDocument but it
* returns a mozilla::dom::Element instead of a nsIDOMElement.
* It prevents converting nsIDOMElement to mozilla::dom::Element which is
* already converted from mozilla::dom::Element.
*/
virtual Element* GetElementById(const nsAString& aElementId) = 0;
/**
* This method returns _all_ the elements in this document which
* have id aElementId, if there are any. Otherwise it returns null.
* The entries of the nsSmallVoidArray are Element*
*/
virtual const nsSmallVoidArray* GetAllElementsForId(const nsAString& aElementId) const = 0;
/**
* Lookup an image element using its associated ID, which is usually provided
* by |-moz-element()|. Similar to GetElementById, with the difference that
* elements set using mozSetImageElement have higher priority.
* @param aId the ID associated the element we want to lookup
* @return the element associated with |aId|
*/
virtual Element* LookupImageElement(const nsAString& aElementId) = 0;
nsresult ScheduleFrameRequestCallback(nsIFrameRequestCallback* aCallback,
PRInt32 *aHandle);
void CancelFrameRequestCallback(PRInt32 aHandle);
typedef nsTArray< nsCOMPtr<nsIFrameRequestCallback> > FrameRequestCallbackList;
/**
* Put this document's frame request callbacks into the provided
* list, and forget about them.
*/
void TakeFrameRequestCallbacks(FrameRequestCallbackList& aCallbacks);
// This returns true when the document tree is being teared down.
bool InUnlinkOrDeletion() { return mInUnlinkOrDeletion; }
/*
* Image Tracking
*
* Style and content images register their imgIRequests with their document
* so that the document can efficiently tell all descendant images when they
* are and are not visible. When an image is on-screen, we want to call
* LockImage() on it so that it doesn't do things like discarding frame data
* to save memory. The PresShell informs the document whether its images
* should be locked or not via SetImageLockingState().
*
* See bug 512260.
*/
// Add/Remove images from the document image tracker
virtual nsresult AddImage(imgIRequest* aImage) = 0;
virtual nsresult RemoveImage(imgIRequest* aImage) = 0;
// Makes the images on this document locked/unlocked. By default, the locking
// state is unlocked/false.
virtual nsresult SetImageLockingState(bool aLocked) = 0;
virtual nsresult AddPlugin(nsIObjectLoadingContent* aPlugin) = 0;
virtual void RemovePlugin(nsIObjectLoadingContent* aPlugin) = 0;
virtual void GetPlugins(nsTArray<nsIObjectLoadingContent*>& aPlugins) = 0;
virtual nsresult GetStateObject(nsIVariant** aResult) = 0;
virtual nsDOMNavigationTiming* GetNavigationTiming() const = 0;
virtual nsresult SetNavigationTiming(nsDOMNavigationTiming* aTiming) = 0;
virtual Element* FindImageMap(const nsAString& aNormalizedMapName) = 0;
// Called to notify the document that a listener on the "mozaudioavailable"
// event has been added. Media elements in the document need to ensure they
// fire the event.
virtual void NotifyAudioAvailableListener() = 0;
// Returns true if the document has "mozaudioavailable" event listeners.
virtual bool HasAudioAvailableListeners() = 0;
// Add aLink to the set of links that need their status resolved.
void RegisterPendingLinkUpdate(mozilla::dom::Link* aLink);
// Remove aLink from the set of links that need their status resolved.
// This function must be called when links are removed from the document.
void UnregisterPendingLinkUpdate(mozilla::dom::Link* aElement);
// Update state on links in mLinksToUpdate. This function must
// be called prior to selector matching.
void FlushPendingLinkUpdates();
#define DEPRECATED_OPERATION(_op) e##_op,
enum DeprecatedOperations {
#include "nsDeprecatedOperationList.h"
eDeprecatedOperationCount
};
#undef DEPRECATED_OPERATION
void WarnOnceAbout(DeprecatedOperations aOperation, bool asError = false);
virtual void PostVisibilityUpdateEvent() = 0;
bool IsSyntheticDocument() { return mIsSyntheticDocument; }
void SetNeedLayoutFlush() {
mNeedLayoutFlush = true;
if (mDisplayDocument) {
mDisplayDocument->SetNeedLayoutFlush();
}
}
void SetNeedStyleFlush() {
mNeedStyleFlush = true;
if (mDisplayDocument) {
mDisplayDocument->SetNeedStyleFlush();
}
}
// Note: nsIDocument is a sub-class of nsINode, which has a
// SizeOfExcludingThis function. However, because nsIDocument objects can
// only appear at the top of the DOM tree, we have a specialized measurement
// function which returns multiple sizes.
virtual void DocSizeOfExcludingThis(nsWindowSizes* aWindowSizes) const;
// DocSizeOfIncludingThis doesn't need to be overridden by sub-classes
// because nsIDocument inherits from nsINode; see the comment above the
// declaration of nsINode::SizeOfIncludingThis.
virtual void DocSizeOfIncludingThis(nsWindowSizes* aWindowSizes) const;
bool MayHaveDOMMutationObservers()
{
return mMayHaveDOMMutationObservers;
}
void SetMayHaveDOMMutationObservers()
{
mMayHaveDOMMutationObservers = true;
}
bool IsInSyncOperation()
{
return mInSyncOperationCount != 0;
}
void SetIsInSyncOperation(bool aSync)
{
if (aSync) {
++mInSyncOperationCount;
} else {
--mInSyncOperationCount;
}
}
private:
PRUint64 mWarnedAbout;
protected:
~nsIDocument();
nsPropertyTable* GetExtraPropertyTable(PRUint16 aCategory);
// Never ever call this. Only call GetWindow!
virtual nsPIDOMWindow *GetWindowInternal() const = 0;
// Never ever call this. Only call GetInnerWindow!
virtual nsPIDOMWindow *GetInnerWindowInternal() = 0;
// Never ever call this. Only call GetScriptHandlingObject!
virtual nsIScriptGlobalObject* GetScriptHandlingObjectInternal() const = 0;
// Never ever call this. Only call AllowXULXBL!
virtual bool InternalAllowXULXBL() = 0;
/**
* These methods should be called before and after dispatching
* a mutation event.
* To make this easy and painless, use the mozAutoSubtreeModified helper class.
*/
virtual void WillDispatchMutationEvent(nsINode* aTarget) = 0;
virtual void MutationEventDispatched(nsINode* aTarget) = 0;
friend class mozAutoSubtreeModified;
virtual Element* GetNameSpaceElement()
{
return GetRootElement();
}
void SetContentTypeInternal(const nsACString& aType)
{
mCachedEncoder = nullptr;
mContentType = aType;
}
nsCString GetContentTypeInternal() const
{
return mContentType;
}
nsCOMPtr<nsIURI> mDocumentURI;
nsCOMPtr<nsIURI> mOriginalURI;
nsCOMPtr<nsIURI> mDocumentBaseURI;
nsWeakPtr mDocumentLoadGroup;
nsWeakPtr mDocumentContainer;
nsCString mCharacterSet;
PRInt32 mCharacterSetSource;
// This is just a weak pointer; the parent document owns its children.
nsIDocument* mParentDocument;
// A reference to the element last returned from GetRootElement().
mozilla::dom::Element* mCachedRootElement;
// We hold a strong reference to mNodeInfoManager through mNodeInfo
nsNodeInfoManager* mNodeInfoManager; // [STRONG]
nsRefPtr<mozilla::css::Loader> mCSSLoader;
nsHTMLStyleSheet* mAttrStyleSheet;
// The set of all object, embed, applet, video and audio elements for
// which this is the owner document. (They might not be in the document.)
// These are non-owning pointers, the elements are responsible for removing
// themselves when they go away.
nsAutoPtr<nsTHashtable<nsPtrHashKey<nsIContent> > > mFreezableElements;
// The set of all links that need their status resolved. Links must add themselves
// to this set by calling RegisterPendingLinkUpdate when added to a document and must
// remove themselves by calling UnregisterPendingLinkUpdate when removed from a document.
nsTHashtable<nsPtrHashKey<mozilla::dom::Link> > mLinksToUpdate;
// SMIL Animation Controller, lazily-initialized in GetAnimationController
nsRefPtr<nsSMILAnimationController> mAnimationController;
// Table of element properties for this document.
nsPropertyTable mPropertyTable;
nsTArray<nsAutoPtr<nsPropertyTable> > mExtraPropertyTables;
// Compatibility mode
nsCompatibility mCompatMode;
// True if BIDI is enabled.
bool mBidiEnabled;
// True if a MathML element has ever been owned by this document.
bool mMathMLEnabled;
// True if this document is the initial document for a window. This should
// basically be true only for documents that exist in newly-opened windows or
// documents created to satisfy a GetDocument() on a window when there's no
// document in it.
bool mIsInitialDocumentInWindow;
bool mIsRegularHTML;
bool mIsXUL;
enum {
eTriUnset = 0,
eTriFalse,
eTriTrue
} mAllowXULXBL;
// True if we're loaded as data and therefor has any dangerous stuff, such
// as scripts and plugins, disabled.
bool mLoadedAsData;
// This flag is only set in nsXMLDocument, for e.g. documents used in XBL. We
// don't want animations to play in such documents, so we need to store the
// flag here so that we can check it in nsDocument::GetAnimationController.
bool mLoadedAsInteractiveData;
// If true, whoever is creating the document has gotten it to the
// point where it's safe to start layout on it.
bool mMayStartLayout;
// True iff we've ever fired a DOMTitleChanged event for this document
bool mHaveFiredTitleChange;
// True iff IsShowing() should be returning true
bool mIsShowing;
// True iff the document "page" is not hidden (i.e. currently in the
// bfcache)
bool mVisible;
// True if our content viewer has been removed from the docshell
// (it may still be displayed, but in zombie state). Form control data
// has been saved.
bool mRemovedFromDocShell;
// True iff DNS prefetch is allowed for this document. Note that if the
// document has no window, DNS prefetch won't be performed no matter what.
bool mAllowDNSPrefetch;
// True when this document is a static clone of a normal document
bool mIsStaticDocument;
// True while this document is being cloned to a static document.
bool mCreatingStaticClone;
// True iff the document is being unlinked or deleted.
bool mInUnlinkOrDeletion;
// True if document has ever had script handling object.
bool mHasHadScriptHandlingObject;
// True if we're an SVG document being used as an image.
bool mIsBeingUsedAsImage;
// True is this document is synthetic : stand alone image, video, audio
// file, etc.
bool mIsSyntheticDocument;
// True if this document has links whose state needs updating
bool mHasLinksToUpdate;
// True if a layout flush might not be a no-op
bool mNeedLayoutFlush;
// True if a style flush might not be a no-op
bool mNeedStyleFlush;
// True if a DOMMutationObserver is perhaps attached to a node in the document.
bool mMayHaveDOMMutationObservers;
// The document's script global object, the object from which the
// document can get its script context and scope. This is the
// *inner* window object.
nsCOMPtr<nsIScriptGlobalObject> mScriptGlobalObject;
// If mIsStaticDocument is true, mOriginalDocument points to the original
// document.
nsCOMPtr<nsIDocument> mOriginalDocument;
// The bidi options for this document. What this bitfield means is
// defined in nsBidiUtils.h
PRUint32 mBidiOptions;
nsCString mContentLanguage;
private:
nsCString mContentType;
protected:
// The document's security info
nsCOMPtr<nsISupports> mSecurityInfo;
// if this document is part of a multipart document,
// the ID can be used to distinguish it from the other parts.
PRUint32 mPartID;
// Cycle collector generation in which we're certain that this document
// won't be collected
PRUint32 mMarkedCCGeneration;
nsIPresShell* mPresShell;
nsCOMArray<nsINode> mSubtreeModifiedTargets;
PRUint32 mSubtreeModifiedDepth;
// If we're an external resource document, this will be non-null and will
// point to our "display document": the one that all resource lookups should
// go to.
nsCOMPtr<nsIDocument> mDisplayDocument;
PRUint32 mEventsSuppressed;
/**
* The number number of external scripts (ones with the src attribute) that
* have this document as their owner and that are being evaluated right now.
*/
PRUint32 mExternalScriptsBeingEvaluated;
/**
* The current frame request callback handle
*/
PRInt32 mFrameRequestCallbackCounter;
// Weak reference to mScriptGlobalObject QI:d to nsPIDOMWindow,
// updated on every set of mSecriptGlobalObject.
nsPIDOMWindow *mWindow;
nsCOMPtr<nsIDocumentEncoder> mCachedEncoder;
struct FrameRequest {
FrameRequest(nsIFrameRequestCallback* aCallback,
PRInt32 aHandle) :
mCallback(aCallback),
mHandle(aHandle)
{}
// Conversion operator so that we can append these to a
// FrameRequestCallbackList
operator nsIFrameRequestCallback* const () const { return mCallback; }
// Comparator operators to allow RemoveElementSorted with an
// integer argument on arrays of FrameRequest
bool operator==(PRInt32 aHandle) const {
return mHandle == aHandle;
}
bool operator<(PRInt32 aHandle) const {
return mHandle < aHandle;
}
nsCOMPtr<nsIFrameRequestCallback> mCallback;
PRInt32 mHandle;
};
nsTArray<FrameRequest> mFrameRequestCallbacks;
// This object allows us to evict ourself from the back/forward cache. The
// pointer is non-null iff we're currently in the bfcache.
nsIBFCacheEntry *mBFCacheEntry;
// Our base target.
nsString mBaseTarget;
nsCOMPtr<nsIStructuredCloneContainer> mStateObjectContainer;
nsCOMPtr<nsIVariant> mStateObjectCached;
PRUint8 mDefaultElementType;
PRUint32 mInSyncOperationCount;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIDocument, NS_IDOCUMENT_IID)
/**
* mozAutoSubtreeModified batches DOM mutations so that a DOMSubtreeModified
* event is dispatched, if necessary, when the outermost mozAutoSubtreeModified
* object is deleted.
*/
class NS_STACK_CLASS mozAutoSubtreeModified
{
public:
/**
* @param aSubTreeOwner The document in which a subtree will be modified.
* @param aTarget The target of the possible DOMSubtreeModified event.
* Can be nullptr, in which case mozAutoSubtreeModified
* is just used to batch DOM mutations.
*/
mozAutoSubtreeModified(nsIDocument* aSubtreeOwner, nsINode* aTarget)
{
UpdateTarget(aSubtreeOwner, aTarget);
}
~mozAutoSubtreeModified()
{
UpdateTarget(nullptr, nullptr);
}
void UpdateTarget(nsIDocument* aSubtreeOwner, nsINode* aTarget)
{
if (mSubtreeOwner) {
mSubtreeOwner->MutationEventDispatched(mTarget);
}
mTarget = aTarget;
mSubtreeOwner = aSubtreeOwner;
if (mSubtreeOwner) {
mSubtreeOwner->WillDispatchMutationEvent(mTarget);
}
}
private:
nsCOMPtr<nsINode> mTarget;
nsCOMPtr<nsIDocument> mSubtreeOwner;
};
class NS_STACK_CLASS nsAutoSyncOperation
{
public:
nsAutoSyncOperation(nsIDocument* aDocument);
~nsAutoSyncOperation();
private:
nsCOMArray<nsIDocument> mDocuments;
PRUint32 mMicroTaskLevel;
};
// XXX These belong somewhere else
nsresult
NS_NewHTMLDocument(nsIDocument** aInstancePtrResult);
nsresult
NS_NewXMLDocument(nsIDocument** aInstancePtrResult);
nsresult
NS_NewSVGDocument(nsIDocument** aInstancePtrResult);
nsresult
NS_NewImageDocument(nsIDocument** aInstancePtrResult);
#ifdef MOZ_MEDIA
nsresult
NS_NewVideoDocument(nsIDocument** aInstancePtrResult);
#endif
nsresult
NS_NewDocumentFragment(nsIDOMDocumentFragment** aInstancePtrResult,
nsNodeInfoManager *aNodeInfoManager);
// Note: it's the caller's responsibility to create or get aPrincipal as needed
// -- this method will not attempt to get a principal based on aDocumentURI.
// Also, both aDocumentURI and aBaseURI must not be null.
nsresult
NS_NewDOMDocument(nsIDOMDocument** aInstancePtrResult,
const nsAString& aNamespaceURI,
const nsAString& aQualifiedName,
nsIDOMDocumentType* aDoctype,
nsIURI* aDocumentURI,
nsIURI* aBaseURI,
nsIPrincipal* aPrincipal,
bool aLoadedAsData,
nsIScriptGlobalObject* aEventObject,
DocumentFlavor aFlavor);
// This is used only for xbl documents created from the startup cache.
// Non-cached documents are created in the same manner as xml documents.
nsresult
NS_NewXBLDocument(nsIDOMDocument** aInstancePtrResult,
nsIURI* aDocumentURI,
nsIURI* aBaseURI,
nsIPrincipal* aPrincipal);
nsresult
NS_NewPluginDocument(nsIDocument** aInstancePtrResult);
inline nsIDocument*
nsINode::GetOwnerDocument() const
{
nsIDocument* ownerDoc = OwnerDoc();
return ownerDoc != this ? ownerDoc : nullptr;
}
inline nsINode*
nsINode::OwnerDocAsNode() const
{
return OwnerDoc();
}
#endif /* nsIDocument_h___ */
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