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gecko/content/base/public/nsIDocument.h
Robert O'Callahan d723594f8f Bug 792675. Part 4: Refactor nsBlobURI/nsBlobProtocolHandler to nsHostObjectURI/nsHostObjectProtocolHandler. r=sicking 
The code to handle MediaStream URIs is almost the same as for Blobs, so share it.
nsHostObjectProtocolHandler is modified a bit to simplify method names. Also
we make nsHostObjectProtocolHandler::AddDataEntry take responsibility for
generating the URI to avoid duplicating that code later.
We need separate subclasses for each kind of host object protocol handler,
but we don't need separate subclasses for each kind of host object URI.

--HG--
rename : content/base/public/nsBlobProtocolHandler.h => content/base/public/nsHostObjectProtocolHandler.h
rename : content/base/src/nsBlobProtocolHandler.cpp => content/base/src/nsHostObjectProtocolHandler.cpp
rename : content/base/src/nsBlobURI.cpp => content/base/src/nsHostObjectURI.cpp
rename : content/base/src/nsBlobURI.h => content/base/src/nsHostObjectURI.h
extra : rebase_source : bfb1d7ea2813100a35f9a2054a67584e38f5f330
2012-09-25 15:24:44 +12:00

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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 "mozFlushType.h" // for enum
#include "nsAutoPtr.h" // for member
#include "nsCOMArray.h" // for member
#include "nsCRT.h" // for NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
#include "nsCompatibility.h" // for member
#include "nsCOMPtr.h" // for member
#include "nsGkAtoms.h" // for static class members
#include "nsIDocumentEncoder.h" // for member (in nsCOMPtr)
#include "nsIDocumentObserver.h" // for typedef (nsUpdateType)
#include "nsIFrameRequestCallback.h" // for member (in nsCOMPtr)
#include "nsILoadContext.h" // for member (in nsCOMPtr)
#include "nsILoadGroup.h" // for member (in nsCOMPtr)
#include "nsINode.h" // for base class
#include "nsIScriptGlobalObject.h" // for member (in nsCOMPtr)
#include "nsIStructuredCloneContainer.h" // for member (in nsCOMPtr)
#include "nsPIDOMWindow.h" // for use in inline functions
#include "nsPropertyTable.h" // for member
#include "nsTHashtable.h" // for member
#include "mozilla/dom/DirectionalityUtils.h"
class imgIRequest;
class nsAString;
class nsBindingManager;
class nsCSSStyleSheet;
class nsDOMNavigationTiming;
class nsEventStates;
class nsFrameLoader;
class nsHTMLCSSStyleSheet;
class nsHTMLStyleSheet;
class nsIAtom;
class nsIBFCacheEntry;
class nsIBoxObject;
class nsIChannel;
class nsIContent;
class nsIContentSink;
class nsIDocShell;
class nsIDocumentObserver;
class nsIDOMDocument;
class nsIDOMDocumentFragment;
class nsIDOMDocumentType;
class nsIDOMElement;
class nsIDOMEventTarget;
class nsIDOMNodeList;
class nsILayoutHistoryState;
class nsIObjectLoadingContent;
class nsIObserver;
class nsIPresShell;
class nsIPrincipal;
class nsIRequest;
class nsIStreamListener;
class nsIStyleRule;
class nsIStyleSheet;
class nsIURI;
class nsIVariant;
class nsIViewManager;
class nsPresContext;
class nsScriptLoader;
class nsSMILAnimationController;
class nsStyleSet;
class nsWindowSizes;
namespace mozilla {
namespace css {
class Loader;
class ImageLoader;
} // namespace css
namespace dom {
class Link;
class Element;
} // namespace dom
} // namespace mozilla
#define NS_IDOCUMENT_IID \
{ 0x20d19edb, 0xa74c, 0x4ce4, \
{ 0xb2, 0x7c, 0x5b, 0xdd, 0x6f, 0xbd, 0x2b, 0x66 } }
// 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;
int32_t GetDocumentCharacterSetSource() const
{
return mCharacterSetSource;
}
// This method MUST be called before SetDocumentCharacterSet if
// you're planning to call both.
void SetDocumentCharacterSetSource(int32_t 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
*/
uint32_t 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(uint32_t aBidiOptions)
{
mBidiOptions = aBidiOptions;
}
/**
* Get the sandbox flags for this document.
* @see nsSandboxFlags.h for the possible flags
*/
uint32_t GetSandboxFlags() const
{
return mSandboxFlags;
}
/**
* Set the sandbox flags for this document.
* @see nsSandboxFlags.h for the possible flags
*/
void SetSandboxFlags(uint32_t sandboxFlags)
{
mSandboxFlags = sandboxFlags;
}
inline mozilla::directionality::Directionality GetDocumentDirectionality() {
return mDirectionality;
}
/**
* 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;
}
/**
* Are plugins allowed in this document ?
*/
virtual nsresult GetAllowPlugins (bool* aAllowPlugins) = 0;
/**
* 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 int32_t 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(int32_t 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, int32_t 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 int32_t 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 int32_t GetNumberOfCatalogStyleSheets() const = 0;
virtual nsIStyleSheet* GetCatalogStyleSheetAt(int32_t aIndex) const = 0;
virtual void AddCatalogStyleSheet(nsIStyleSheet* aSheet) = 0;
virtual void EnsureCatalogStyleSheet(const char *aStyleSheetURI) = 0;
enum additionalSheetType {
eAgentSheet,
eUserSheet,
eAuthorSheet,
SheetTypeCount
};
virtual nsresult LoadAdditionalStyleSheet(additionalSheetType aType, nsIURI* aSheetURI) = 0;
virtual void RemoveAdditionalStyleSheet(additionalSheetType aType, nsIURI* sheetURI) = 0;
virtual nsIStyleSheet* FirstAdditionalAuthorSheet() = 0;
/**
* Get this document's CSSLoader. This is guaranteed to not return null.
*/
mozilla::css::Loader* CSSLoader() const {
return mCSSLoader;
}
/**
* Get this document's StyleImageLoader. This is guaranteed to not return null.
*/
mozilla::css::ImageLoader* StyleImageLoader() const {
return mStyleImageLoader;
}
/**
* 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.
*/
uint64_t OuterWindowID() const
{
nsPIDOMWindow *window = GetWindow();
return window ? window->WindowID() : 0;
}
/**
* Return the inner window ID.
*/
uint64_t 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 int32_t 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,
int32_t 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.
*/
int32_t GetDefaultNamespaceID() const
{
return mDefaultElementType;
}
void DeleteAllProperties();
void DeleteAllPropertiesFor(nsINode* aNode);
nsPropertyTable* PropertyTable(uint16_t aCategory) {
if (aCategory == 0)
return &mPropertyTable;
return GetExtraPropertyTable(aCategory);
}
uint32_t GetPropertyTableCount()
{ return mExtraPropertyTables.Length() + 1; }
/**
* Sets the ID used to identify this part of the multipart document
*/
void SetPartID(uint32_t aID) {
mPartID = aID;
}
/**
* Return the ID used to identify this part of the multipart document
*/
uint32_t 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(uint32_t aGeneration)
{
mMarkedCCGeneration = aGeneration;
}
/**
* Gets the cycle collector generation this document is marked for.
*/
uint32_t 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(uint32_t aIncrease = 1) = 0;
/**
* Unsuppress event handling.
* @param aFireEvents If true, delayed events (focus/blur) will be fired
* asynchronously.
*/
virtual void UnsuppressEventHandlingAndFireEvents(bool aFireEvents) = 0;
uint32_t 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. aCrossOriginAttr
* should be a void string if the attr is not present.
*/
virtual void PreloadStyle(nsIURI* aURI, const nsAString& aCharset,
const nsAString& aCrossOriginAttr) = 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 hostobject 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
* nsHostObjectProtocolHandler::RemoveDataEntry
*/
virtual void RegisterHostObjectUri(const nsACString& aUri) = 0;
virtual void UnregisterHostObjectUri(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,
int32_t *aHandle);
void CancelFrameRequestCallback(int32_t 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;
// If the REQUEST_DISCARD flag is passed then if the lock count is zero we
// will request the image be discarded now (instead of waiting).
enum { REQUEST_DISCARD = 0x1 };
virtual nsresult RemoveImage(imgIRequest* aImage, uint32_t aFlags = 0) = 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;
}
}
bool CreatingStaticClone() const
{
return mCreatingStaticClone;
}
private:
uint64_t mWarnedAbout;
protected:
~nsIDocument();
nsPropertyTable* GetExtraPropertyTable(uint16_t 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;
int32_t 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;
nsRefPtr<mozilla::css::ImageLoader> mStyleImageLoader;
nsRefPtr<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
uint32_t mBidiOptions;
// The sandbox flags on the document. These reflect the value of the sandbox attribute of the
// associated IFRAME or CSP-protectable content, if existent. These are set at load time and
// are immutable - see nsSandboxFlags.h for the possible flags.
uint32_t mSandboxFlags;
// The root directionality of this document.
mozilla::directionality::Directionality mDirectionality;
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.
uint32_t mPartID;
// Cycle collector generation in which we're certain that this document
// won't be collected
uint32_t mMarkedCCGeneration;
nsIPresShell* mPresShell;
nsCOMArray<nsINode> mSubtreeModifiedTargets;
uint32_t 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;
uint32_t 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.
*/
uint32_t mExternalScriptsBeingEvaluated;
/**
* The current frame request callback handle
*/
int32_t 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,
int32_t 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==(int32_t aHandle) const {
return mHandle == aHandle;
}
bool operator<(int32_t aHandle) const {
return mHandle < aHandle;
}
nsCOMPtr<nsIFrameRequestCallback> mCallback;
int32_t 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;
uint8_t mDefaultElementType;
uint32_t 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;
uint32_t 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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