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gecko-dev/layout/base/nsPresContext.h
Milan Sreckovic 3dffde4a8d Bug 895003 - Introduce a second preference to control the chrome paint flashing - nglayout.debug.paint_flashing_chrome. r=roc 
The original pref still controls content and chrome when set. The preference is now live, for content and chrome, the change will be seen on the next refresh. The cached value is now in nsPresContext, rather than nsRefreshDriver.
2013-07-22 11:51:38 -04:00

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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/. */
/* a presentation of a document, part 1 */
#ifndef nsPresContext_h___
#define nsPresContext_h___
#include "mozilla/Attributes.h"
#include "nsISupports.h"
#include "nsColor.h"
#include "nsCoord.h"
#include "nsCOMPtr.h"
#include "nsIPresShell.h"
#include "nsRect.h"
#include "nsDeviceContext.h"
#include "nsFont.h"
#include "nsIObserver.h"
#include "nsITimer.h"
#include "nsCRT.h"
#include "FramePropertyTable.h"
#include "nsGkAtoms.h"
#include "nsRefPtrHashtable.h"
#include "nsCycleCollectionParticipant.h"
#include "nsChangeHint.h"
#include <algorithm>
// This also pulls in gfxTypes.h, which we cannot include directly.
#include "gfxRect.h"
#include "nsTArray.h"
#include "nsAutoPtr.h"
#include "nsIWidget.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/TimeStamp.h"
#include "prclist.h"
#include "Layers.h"
#include "nsRefreshDriver.h"
#ifdef IBMBIDI
class nsBidiPresUtils;
#endif // IBMBIDI
struct nsRect;
class imgIRequest;
class nsAString;
class nsIPrintSettings;
class nsIDocument;
class nsILanguageAtomService;
class nsITheme;
class nsIContent;
class nsFontMetrics;
class nsIFrame;
class nsFrameManager;
class nsILinkHandler;
class nsStyleContext;
class nsIAtom;
class nsEventStateManager;
class nsIURI;
class nsICSSPseudoComparator;
struct nsStyleBackground;
struct nsStyleBorder;
class nsIRunnable;
class gfxUserFontSet;
class nsUserFontSet;
struct nsFontFaceRuleContainer;
class nsObjectFrame;
class nsTransitionManager;
class nsAnimationManager;
class imgIContainer;
class nsIDOMMediaQueryList;
#ifdef MOZ_REFLOW_PERF
class nsRenderingContext;
#endif
namespace mozilla {
class RestyleManager;
}
// supported values for cached bool types
enum nsPresContext_CachedBoolPrefType {
kPresContext_UseDocumentColors = 1,
kPresContext_UseDocumentFonts,
kPresContext_UnderlineLinks
};
// supported values for cached integer pref types
enum nsPresContext_CachedIntPrefType {
kPresContext_ScrollbarSide = 1,
kPresContext_BidiDirection
};
// IDs for the default variable and fixed fonts (not to be changed, see nsFont.h)
// To be used for Get/SetDefaultFont(). The other IDs in nsFont.h are also supported.
const uint8_t kPresContext_DefaultVariableFont_ID = 0x00; // kGenericFont_moz_variable
const uint8_t kPresContext_DefaultFixedFont_ID = 0x01; // kGenericFont_moz_fixed
#ifdef DEBUG
struct nsAutoLayoutPhase;
enum nsLayoutPhase {
eLayoutPhase_Paint,
eLayoutPhase_Reflow,
eLayoutPhase_FrameC,
eLayoutPhase_COUNT
};
#endif
class nsInvalidateRequestList {
public:
struct Request {
nsRect mRect;
uint32_t mFlags;
};
void TakeFrom(nsInvalidateRequestList* aList)
{
mRequests.MoveElementsFrom(aList->mRequests);
}
bool IsEmpty() { return mRequests.IsEmpty(); }
nsTArray<Request> mRequests;
};
/**
* Layer UserData for ContainerLayers that want to be notified
* of local invalidations of them and their descendant layers.
* Pass a callback to ComputeDifferences to have these called.
*/
class ContainerLayerPresContext : public mozilla::layers::LayerUserData {
public:
nsPresContext* mPresContext;
};
extern uint8_t gNotifySubDocInvalidationData;
/* Used by nsPresContext::HasAuthorSpecifiedRules */
#define NS_AUTHOR_SPECIFIED_BACKGROUND (1 << 0)
#define NS_AUTHOR_SPECIFIED_BORDER (1 << 1)
#define NS_AUTHOR_SPECIFIED_PADDING (1 << 2)
#define NS_AUTHOR_SPECIFIED_TEXT_SHADOW (1 << 3)
class nsRootPresContext;
// An interface for presentation contexts. Presentation contexts are
// objects that provide an outer context for a presentation shell.
class nsPresContext : public nsIObserver {
public:
typedef mozilla::FramePropertyTable FramePropertyTable;
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_NSIOBSERVER
NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
NS_DECL_CYCLE_COLLECTION_CLASS(nsPresContext)
enum nsPresContextType {
eContext_Galley, // unpaginated screen presentation
eContext_PrintPreview, // paginated screen presentation
eContext_Print, // paginated printer presentation
eContext_PageLayout // paginated & editable.
};
// Policies for rebuilding style data.
enum StyleRebuildType {
eRebuildStyleIfNeeded,
eAlwaysRebuildStyle
};
nsPresContext(nsIDocument* aDocument, nsPresContextType aType) NS_HIDDEN;
/**
* Initialize the presentation context from a particular device.
*/
NS_HIDDEN_(nsresult) Init(nsDeviceContext* aDeviceContext);
/**
* Set the presentation shell that this context is bound to.
* A presentation context may only be bound to a single shell.
*/
NS_HIDDEN_(void) SetShell(nsIPresShell* aShell);
NS_HIDDEN_(nsPresContextType) Type() const { return mType; }
/**
* Get the PresentationShell that this context is bound to.
*/
nsIPresShell* PresShell() const
{
NS_ASSERTION(mShell, "Null pres shell");
return mShell;
}
nsIPresShell* GetPresShell() const { return mShell; }
/**
* Returns the parent prescontext for this one. Returns null if this is a
* root.
*/
nsPresContext* GetParentPresContext();
/**
* Returns the prescontext of the toplevel content document that contains
* this presentation, or null if there isn't one.
*/
nsPresContext* GetToplevelContentDocumentPresContext();
/**
* Returns the nearest widget for the root frame of this.
*
* @param aOffset If non-null the offset from the origin of the root
* frame's view to the widget's origin (usually positive)
* expressed in appunits of this will be returned in
* aOffset.
*/
nsIWidget* GetNearestWidget(nsPoint* aOffset = nullptr);
/**
* Returns the root widget for this.
* Note that the widget is a mediater with IME.
*/
nsIWidget* GetRootWidget();
/**
* Return the presentation context for the root of the view manager
* hierarchy that contains this presentation context, or nullptr if it can't
* be found (e.g. it's detached).
*/
nsRootPresContext* GetRootPresContext();
nsRootPresContext* GetDisplayRootPresContext();
virtual bool IsRoot() { return false; }
nsIDocument* Document() const
{
NS_ASSERTION(!mShell || !mShell->GetDocument() ||
mShell->GetDocument() == mDocument,
"nsPresContext doesn't have the same document as nsPresShell!");
return mDocument;
}
#ifdef _IMPL_NS_LAYOUT
nsStyleSet* StyleSet() { return PresShell()->StyleSet(); }
nsFrameManager* FrameManager()
{ return PresShell()->FrameManager(); }
nsCSSFrameConstructor* FrameConstructor()
{ return PresShell()->FrameConstructor(); }
nsTransitionManager* TransitionManager() { return mTransitionManager; }
nsAnimationManager* AnimationManager() { return mAnimationManager; }
nsRefreshDriver* RefreshDriver() { return mRefreshDriver; }
mozilla::RestyleManager* RestyleManager() { return mRestyleManager; }
#endif
/**
* Rebuilds all style data by throwing out the old rule tree and
* building a new one, and additionally applying aExtraHint (which
* must not contain nsChangeHint_ReconstructFrame) to the root frame.
* Also rebuild the user font set.
*/
void RebuildAllStyleData(nsChangeHint aExtraHint);
/**
* Just like RebuildAllStyleData, except (1) asynchronous and (2) it
* doesn't rebuild the user font set.
*/
void PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint);
void MediaFeatureValuesChanged(StyleRebuildType aShouldRebuild,
nsChangeHint aChangeHint = nsChangeHint(0));
void PostMediaFeatureValuesChangedEvent();
NS_HIDDEN_(void) HandleMediaFeatureValuesChangedEvent();
void FlushPendingMediaFeatureValuesChanged() {
if (mPendingMediaFeatureValuesChanged)
MediaFeatureValuesChanged(eRebuildStyleIfNeeded);
}
/**
* Support for window.matchMedia()
*/
void MatchMedia(const nsAString& aMediaQueryList,
nsIDOMMediaQueryList** aResult);
/**
* Access compatibility mode for this context. This is the same as
* our document's compatibility mode.
*/
nsCompatibility CompatibilityMode() const;
/**
* Notify the context that the document's compatibility mode has changed
*/
NS_HIDDEN_(void) CompatibilityModeChanged();
/**
* Access the image animation mode for this context
*/
uint16_t ImageAnimationMode() const { return mImageAnimationMode; }
virtual NS_HIDDEN_(void) SetImageAnimationModeExternal(uint16_t aMode);
NS_HIDDEN_(void) SetImageAnimationModeInternal(uint16_t aMode);
#ifdef _IMPL_NS_LAYOUT
void SetImageAnimationMode(uint16_t aMode)
{ SetImageAnimationModeInternal(aMode); }
#else
void SetImageAnimationMode(uint16_t aMode)
{ SetImageAnimationModeExternal(aMode); }
#endif
/**
* Get medium of presentation
*/
nsIAtom* Medium() {
if (!mIsEmulatingMedia)
return mMedium;
return mMediaEmulated;
}
/*
* Render the document as if being viewed on a device with the specified
* media type.
*/
void EmulateMedium(const nsAString& aMediaType);
/*
* Restore the viewer's natural medium
*/
void StopEmulatingMedium();
void* AllocateFromShell(size_t aSize)
{
if (mShell)
return mShell->AllocateMisc(aSize);
return nullptr;
}
void FreeToShell(size_t aSize, void* aFreeChunk)
{
NS_ASSERTION(mShell, "freeing after shutdown");
if (mShell)
mShell->FreeMisc(aSize, aFreeChunk);
}
/**
* Get the default font for the given language and generic font ID.
* If aLanguage is nullptr, the document's language is used.
*
* This object is read-only, you must copy the font to modify it.
*
* When aFontID is kPresContext_DefaultVariableFontID or
* kPresContext_DefaultFixedFontID (which equals
* kGenericFont_moz_fixed, which is used for the -moz-fixed generic),
* the nsFont returned has its name as a CSS generic family (serif or
* sans-serif for the former, monospace for the latter), and its size
* as the default font size for variable or fixed fonts for the
* language group.
*
* For aFontID corresponding to a CSS Generic, the nsFont returned has
* its name set to that generic font's name, and its size set to
* the user's preference for font size for that generic and the
* given language.
*/
NS_HIDDEN_(const nsFont*) GetDefaultFont(uint8_t aFontID,
nsIAtom *aLanguage) const;
/** Get a cached boolean pref, by its type */
// * - initially created for bugs 31816, 20760, 22963
bool GetCachedBoolPref(nsPresContext_CachedBoolPrefType aPrefType) const
{
// If called with a constant parameter, the compiler should optimize
// this switch statement away.
switch (aPrefType) {
case kPresContext_UseDocumentFonts:
return mUseDocumentFonts;
case kPresContext_UseDocumentColors:
return mUseDocumentColors;
case kPresContext_UnderlineLinks:
return mUnderlineLinks;
default:
NS_ERROR("Invalid arg passed to GetCachedBoolPref");
}
return false;
}
/** Get a cached integer pref, by its type */
// * - initially created for bugs 30910, 61883, 74186, 84398
int32_t GetCachedIntPref(nsPresContext_CachedIntPrefType aPrefType) const
{
// If called with a constant parameter, the compiler should optimize
// this switch statement away.
switch (aPrefType) {
case kPresContext_ScrollbarSide:
return mPrefScrollbarSide;
case kPresContext_BidiDirection:
return mPrefBidiDirection;
default:
NS_ERROR("invalid arg passed to GetCachedIntPref");
}
return false;
}
/**
* Get the default colors
*/
const nscolor DefaultColor() const { return mDefaultColor; }
const nscolor DefaultBackgroundColor() const { return mBackgroundColor; }
const nscolor DefaultLinkColor() const { return mLinkColor; }
const nscolor DefaultActiveLinkColor() const { return mActiveLinkColor; }
const nscolor DefaultVisitedLinkColor() const { return mVisitedLinkColor; }
const nscolor FocusBackgroundColor() const { return mFocusBackgroundColor; }
const nscolor FocusTextColor() const { return mFocusTextColor; }
/**
* Body text color, for use in quirks mode only.
*/
const nscolor BodyTextColor() const { return mBodyTextColor; }
void SetBodyTextColor(nscolor aColor) { mBodyTextColor = aColor; }
bool GetUseFocusColors() const { return mUseFocusColors; }
uint8_t FocusRingWidth() const { return mFocusRingWidth; }
bool GetFocusRingOnAnything() const { return mFocusRingOnAnything; }
uint8_t GetFocusRingStyle() const { return mFocusRingStyle; }
NS_HIDDEN_(void) SetContainer(nsISupports* aContainer);
virtual NS_HIDDEN_(already_AddRefed<nsISupports>) GetContainerExternal() const;
NS_HIDDEN_(already_AddRefed<nsISupports>) GetContainerInternal() const;
#ifdef _IMPL_NS_LAYOUT
already_AddRefed<nsISupports> GetContainer() const
{ return GetContainerInternal(); }
#else
already_AddRefed<nsISupports> GetContainer() const
{ return GetContainerExternal(); }
#endif
// XXX this are going to be replaced with set/get container
void SetLinkHandler(nsILinkHandler* aHandler) { mLinkHandler = aHandler; }
nsILinkHandler* GetLinkHandler() { return mLinkHandler; }
/**
* Get the visible area associated with this presentation context.
* This is the size of the visible area that is used for
* presenting the document. The returned value is in the standard
* nscoord units (as scaled by the device context).
*/
nsRect GetVisibleArea() { return mVisibleArea; }
/**
* Set the currently visible area. The units for r are standard
* nscoord units (as scaled by the device context).
*/
void SetVisibleArea(const nsRect& r) {
if (!r.IsEqualEdges(mVisibleArea)) {
mVisibleArea = r;
// Visible area does not affect media queries when paginated.
if (!IsPaginated() && HasCachedStyleData()) {
mPendingViewportChange = true;
PostMediaFeatureValuesChangedEvent();
}
}
}
/**
* Return true if this presentation context is a paginated
* context.
*/
bool IsPaginated() const { return mPaginated; }
/**
* Sets whether the presentation context can scroll for a paginated
* context.
*/
NS_HIDDEN_(void) SetPaginatedScrolling(bool aResult);
/**
* Return true if this presentation context can scroll for paginated
* context.
*/
bool HasPaginatedScrolling() const { return mCanPaginatedScroll; }
/**
* Get/set the size of a page
*/
nsSize GetPageSize() { return mPageSize; }
void SetPageSize(nsSize aSize) { mPageSize = aSize; }
/**
* Get/set whether this document should be treated as having real pages
* XXX This raises the obvious question of why a document that isn't a page
* is paginated; there isn't a good reason except history
*/
bool IsRootPaginatedDocument() { return mIsRootPaginatedDocument; }
void SetIsRootPaginatedDocument(bool aIsRootPaginatedDocument)
{ mIsRootPaginatedDocument = aIsRootPaginatedDocument; }
/**
* Get/set the print scaling level; used by nsPageFrame to scale up
* pages. Set safe to call before reflow, get guaranteed to be set
* properly after reflow.
*/
float GetPageScale() { return mPageScale; }
void SetPageScale(float aScale) { mPageScale = aScale; }
/**
* Get/set the scaling facor to use when rendering the pages for print preview.
* Only safe to get after print preview set up; safe to set anytime.
* This is a scaling factor for the display of the print preview. It
* does not affect layout. It only affects the size of the onscreen pages
* in print preview.
* XXX Temporary: see http://wiki.mozilla.org/Gecko:PrintPreview
*/
float GetPrintPreviewScale() { return mPPScale; }
void SetPrintPreviewScale(float aScale) { mPPScale = aScale; }
nsDeviceContext* DeviceContext() { return mDeviceContext; }
nsEventStateManager* EventStateManager() { return mEventManager; }
nsIAtom* GetLanguageFromCharset() { return mLanguage; }
float TextZoom() { return mTextZoom; }
void SetTextZoom(float aZoom) {
if (aZoom == mTextZoom)
return;
mTextZoom = aZoom;
if (HasCachedStyleData()) {
// Media queries could have changed, since we changed the meaning
// of 'em' units in them.
MediaFeatureValuesChanged(eAlwaysRebuildStyle, NS_STYLE_HINT_REFLOW);
}
}
/**
* Get the minimum font size for the specified language. If aLanguage
* is nullptr, then the document's language is used.
*/
int32_t MinFontSize(nsIAtom *aLanguage) const {
const LangGroupFontPrefs *prefs = GetFontPrefsForLang(aLanguage);
return std::max(mMinFontSize, prefs->mMinimumFontSize);
}
void SetMinFontSize(int32_t aMinFontSize) {
if (aMinFontSize == mMinFontSize)
return;
mMinFontSize = aMinFontSize;
if (HasCachedStyleData()) {
// Media queries could have changed, since we changed the meaning
// of 'em' units in them.
MediaFeatureValuesChanged(eAlwaysRebuildStyle, NS_STYLE_HINT_REFLOW);
}
}
float GetFullZoom() { return mFullZoom; }
void SetFullZoom(float aZoom);
nscoord GetAutoQualityMinFontSize() {
return DevPixelsToAppUnits(mAutoQualityMinFontSizePixelsPref);
}
/**
* Return the device's screen width in inches, for font size
* inflation.
*
* If |aChanged| is non-null, then aChanged is filled in with whether
* the return value has changed since either:
* a. the last time the function was called with non-null aChanged, or
* b. the first time the function was called.
*/
float ScreenWidthInchesForFontInflation(bool* aChanged = nullptr);
static int32_t AppUnitsPerCSSPixel() { return nsDeviceContext::AppUnitsPerCSSPixel(); }
int32_t AppUnitsPerDevPixel() const { return mDeviceContext->AppUnitsPerDevPixel(); }
static int32_t AppUnitsPerCSSInch() { return nsDeviceContext::AppUnitsPerCSSInch(); }
static nscoord CSSPixelsToAppUnits(int32_t aPixels)
{ return NSIntPixelsToAppUnits(aPixels,
nsDeviceContext::AppUnitsPerCSSPixel()); }
static nscoord CSSPixelsToAppUnits(float aPixels)
{ return NSFloatPixelsToAppUnits(aPixels,
float(nsDeviceContext::AppUnitsPerCSSPixel())); }
static int32_t AppUnitsToIntCSSPixels(nscoord aAppUnits)
{ return NSAppUnitsToIntPixels(aAppUnits,
float(nsDeviceContext::AppUnitsPerCSSPixel())); }
static float AppUnitsToFloatCSSPixels(nscoord aAppUnits)
{ return NSAppUnitsToFloatPixels(aAppUnits,
float(nsDeviceContext::AppUnitsPerCSSPixel())); }
nscoord DevPixelsToAppUnits(int32_t aPixels) const
{ return NSIntPixelsToAppUnits(aPixels,
mDeviceContext->AppUnitsPerDevPixel()); }
int32_t AppUnitsToDevPixels(nscoord aAppUnits) const
{ return NSAppUnitsToIntPixels(aAppUnits,
float(mDeviceContext->AppUnitsPerDevPixel())); }
int32_t CSSPixelsToDevPixels(int32_t aPixels)
{ return AppUnitsToDevPixels(CSSPixelsToAppUnits(aPixels)); }
float CSSPixelsToDevPixels(float aPixels)
{
return NSAppUnitsToFloatPixels(CSSPixelsToAppUnits(aPixels),
float(mDeviceContext->AppUnitsPerDevPixel()));
}
int32_t DevPixelsToIntCSSPixels(int32_t aPixels)
{ return AppUnitsToIntCSSPixels(DevPixelsToAppUnits(aPixels)); }
float DevPixelsToFloatCSSPixels(int32_t aPixels)
{ return AppUnitsToFloatCSSPixels(DevPixelsToAppUnits(aPixels)); }
// If there is a remainder, it is rounded to nearest app units.
nscoord GfxUnitsToAppUnits(gfxFloat aGfxUnits) const
{ return mDeviceContext->GfxUnitsToAppUnits(aGfxUnits); }
gfxFloat AppUnitsToGfxUnits(nscoord aAppUnits) const
{ return mDeviceContext->AppUnitsToGfxUnits(aAppUnits); }
gfxRect AppUnitsToGfxUnits(const nsRect& aAppRect) const
{ return gfxRect(AppUnitsToGfxUnits(aAppRect.x),
AppUnitsToGfxUnits(aAppRect.y),
AppUnitsToGfxUnits(aAppRect.width),
AppUnitsToGfxUnits(aAppRect.height)); }
static nscoord CSSTwipsToAppUnits(float aTwips)
{ return NSToCoordRoundWithClamp(
nsDeviceContext::AppUnitsPerCSSInch() * NS_TWIPS_TO_INCHES(aTwips)); }
// Margin-specific version, since they often need TwipsToAppUnits
static nsMargin CSSTwipsToAppUnits(const nsIntMargin &marginInTwips)
{ return nsMargin(CSSTwipsToAppUnits(float(marginInTwips.top)),
CSSTwipsToAppUnits(float(marginInTwips.right)),
CSSTwipsToAppUnits(float(marginInTwips.bottom)),
CSSTwipsToAppUnits(float(marginInTwips.left))); }
static nscoord CSSPointsToAppUnits(float aPoints)
{ return NSToCoordRound(aPoints * nsDeviceContext::AppUnitsPerCSSInch() /
POINTS_PER_INCH_FLOAT); }
nscoord RoundAppUnitsToNearestDevPixels(nscoord aAppUnits) const
{ return DevPixelsToAppUnits(AppUnitsToDevPixels(aAppUnits)); }
struct ScrollbarStyles {
// Always one of NS_STYLE_OVERFLOW_SCROLL, NS_STYLE_OVERFLOW_HIDDEN,
// or NS_STYLE_OVERFLOW_AUTO.
uint8_t mHorizontal, mVertical;
ScrollbarStyles(uint8_t h, uint8_t v) : mHorizontal(h), mVertical(v) {}
ScrollbarStyles() {}
bool operator==(const ScrollbarStyles& aStyles) const {
return aStyles.mHorizontal == mHorizontal && aStyles.mVertical == mVertical;
}
bool operator!=(const ScrollbarStyles& aStyles) const {
return aStyles.mHorizontal != mHorizontal || aStyles.mVertical != mVertical;
}
};
void SetViewportOverflowOverride(uint8_t aX, uint8_t aY)
{
mViewportStyleOverflow.mHorizontal = aX;
mViewportStyleOverflow.mVertical = aY;
}
ScrollbarStyles GetViewportOverflowOverride()
{
return mViewportStyleOverflow;
}
/**
* Set and get methods for controlling the background drawing
*/
bool GetBackgroundImageDraw() const { return mDrawImageBackground; }
void SetBackgroundImageDraw(bool aCanDraw)
{
mDrawImageBackground = aCanDraw;
}
bool GetBackgroundColorDraw() const { return mDrawColorBackground; }
void SetBackgroundColorDraw(bool aCanDraw)
{
mDrawColorBackground = aCanDraw;
}
/**
* Getter and setter for OMTA time counters
*/
bool ThrottledStyleIsUpToDate() const {
return mLastUpdateThrottledStyle == mRefreshDriver->MostRecentRefresh();
}
void TickLastUpdateThrottledStyle() {
mLastUpdateThrottledStyle = mRefreshDriver->MostRecentRefresh();
}
bool StyleUpdateForAllAnimationsIsUpToDate() const {
return mLastStyleUpdateForAllAnimations == mRefreshDriver->MostRecentRefresh();
}
void TickLastStyleUpdateForAllAnimations() {
mLastStyleUpdateForAllAnimations = mRefreshDriver->MostRecentRefresh();
}
#ifdef IBMBIDI
/**
* Check if bidi enabled (set depending on the presence of RTL
* characters or when default directionality is RTL).
* If enabled, we should apply the Unicode Bidi Algorithm
*
* @lina 07/12/2000
*/
#ifdef _IMPL_NS_LAYOUT
bool BidiEnabled() const { return BidiEnabledInternal(); }
#else
bool BidiEnabled() const { return BidiEnabledExternal(); }
#endif
virtual bool BidiEnabledExternal() const;
bool BidiEnabledInternal() const;
/**
* Set bidi enabled. This means we should apply the Unicode Bidi Algorithm
*
* @lina 07/12/2000
*/
NS_HIDDEN_(void) SetBidiEnabled() const;
/**
* Set visual or implicit mode into the pres context.
*
* Visual directionality is a presentation method that displays text
* as if it were a uni-directional, according to the primary display
* direction only.
*
* Implicit directionality is a presentation method in which the
* direction is determined by the Bidi algorithm according to the
* category of the characters and the category of the adjacent
* characters, and according to their primary direction.
*
* @lina 05/02/2000
*/
void SetVisualMode(bool aIsVisual)
{
mIsVisual = aIsVisual;
}
/**
* Check whether the content should be treated as visual.
*
* @lina 05/02/2000
*/
bool IsVisualMode() const { return mIsVisual; }
//Mohamed
/**
* Set the Bidi options for the presentation context
*/
NS_HIDDEN_(void) SetBidi(uint32_t aBidiOptions,
bool aForceRestyle = false);
/**
* Get the Bidi options for the presentation context
* Not inline so consumers of nsPresContext are not forced to
* include nsIDocument.
*/
NS_HIDDEN_(uint32_t) GetBidi() const;
#endif // IBMBIDI
/**
* Render only Selection
*/
void SetIsRenderingOnlySelection(bool aResult)
{
mIsRenderingOnlySelection = aResult;
}
bool IsRenderingOnlySelection() const { return mIsRenderingOnlySelection; }
NS_HIDDEN_(bool) IsTopLevelWindowInactive();
/*
* Obtain a native them for rendering our widgets (both form controls and html)
*/
NS_HIDDEN_(nsITheme*) GetTheme();
/*
* Notify the pres context that the theme has changed. An internal switch
* means it's one of our Mozilla themes that changed (e.g., Modern to Classic).
* Otherwise, the OS is telling us that the native theme for the platform
* has changed.
*/
NS_HIDDEN_(void) ThemeChanged();
/*
* Notify the pres context that the resolution of the user interface has
* changed. This happens if a window is moved between HiDPI and non-HiDPI
* displays, so that the ratio of points to device pixels changes.
*/
NS_HIDDEN_(void) UIResolutionChanged();
/*
* Notify the pres context that a system color has changed
*/
NS_HIDDEN_(void) SysColorChanged();
/** Printing methods below should only be used for Medium() == print **/
NS_HIDDEN_(void) SetPrintSettings(nsIPrintSettings *aPrintSettings);
nsIPrintSettings* GetPrintSettings() { return mPrintSettings; }
/* Accessor for table of frame properties */
FramePropertyTable* PropertyTable() { return &mPropertyTable; }
/* Helper function that ensures that this prescontext is shown in its
docshell if it's the most recent prescontext for the docshell. Returns
whether the prescontext is now being shown.
*/
NS_HIDDEN_(bool) EnsureVisible();
#ifdef MOZ_REFLOW_PERF
NS_HIDDEN_(void) CountReflows(const char * aName,
nsIFrame * aFrame);
#endif
/**
* This table maps border-width enums 'thin', 'medium', 'thick'
* to actual nscoord values.
*/
const nscoord* GetBorderWidthTable() { return mBorderWidthTable; }
bool IsDynamic() { return (mType == eContext_PageLayout || mType == eContext_Galley); }
bool IsScreen() { return (mMedium == nsGkAtoms::screen ||
mType == eContext_PageLayout ||
mType == eContext_PrintPreview); }
// Is this presentation in a chrome docshell?
bool IsChrome() const
{
return mIsChromeIsCached ? mIsChrome : IsChromeSlow();
}
virtual void InvalidateIsChromeCacheExternal();
void InvalidateIsChromeCacheInternal() { mIsChromeIsCached = false; }
#ifdef _IMPL_NS_LAYOUT
void InvalidateIsChromeCache()
{ InvalidateIsChromeCacheInternal(); }
#else
void InvalidateIsChromeCache()
{ InvalidateIsChromeCacheExternal(); }
#endif
// Public API for native theme code to get style internals.
virtual bool HasAuthorSpecifiedRules(nsIFrame *aFrame, uint32_t ruleTypeMask) const;
// Is it OK to let the page specify colors and backgrounds?
bool UseDocumentColors() const {
return GetCachedBoolPref(kPresContext_UseDocumentColors) || IsChrome();
}
// Explicitly enable and disable paint flashing.
void SetPaintFlashing(bool aPaintFlashing) {
mPaintFlashing = aPaintFlashing;
mPaintFlashingInitialized = true;
}
// This method should be used instead of directly accessing mPaintFlashing,
// as that value may be out of date when mPaintFlashingInitialized is false.
bool GetPaintFlashing() const;
bool SupressingResizeReflow() const { return mSupressResizeReflow; }
virtual NS_HIDDEN_(gfxUserFontSet*) GetUserFontSetExternal();
NS_HIDDEN_(gfxUserFontSet*) GetUserFontSetInternal();
#ifdef _IMPL_NS_LAYOUT
gfxUserFontSet* GetUserFontSet() { return GetUserFontSetInternal(); }
#else
gfxUserFontSet* GetUserFontSet() { return GetUserFontSetExternal(); }
#endif
void FlushUserFontSet();
void RebuildUserFontSet(); // asynchronously
// Should be called whenever the set of fonts available in the user
// font set changes (e.g., because a new font loads, or because the
// user font set is changed and fonts become unavailable).
void UserFontSetUpdated();
// Ensure that it is safe to hand out CSS rules outside the layout
// engine by ensuring that all CSS style sheets have unique inners
// and, if necessary, synchronously rebuilding all style data.
// Returns true on success and false on failure (not safe).
bool EnsureSafeToHandOutCSSRules();
void NotifyInvalidation(uint32_t aFlags);
void NotifyInvalidation(const nsRect& aRect, uint32_t aFlags);
// aRect is in device pixels
void NotifyInvalidation(const nsIntRect& aRect, uint32_t aFlags);
// aFlags are nsIPresShell::PAINT_ flags
void NotifyDidPaintForSubtree(uint32_t aFlags);
void FireDOMPaintEvent(nsInvalidateRequestList* aList);
// Callback for catching invalidations in ContainerLayers
// Passed to LayerProperties::ComputeDifference
static void NotifySubDocInvalidation(mozilla::layers::ContainerLayer* aContainer,
const nsIntRegion& aRegion);
bool IsDOMPaintEventPending();
void ClearMozAfterPaintEvents() {
mInvalidateRequestsSinceLastPaint.mRequests.Clear();
mUndeliveredInvalidateRequestsBeforeLastPaint.mRequests.Clear();
mAllInvalidated = false;
}
bool IsProcessingRestyles() const {
return mProcessingRestyles;
}
void SetProcessingRestyles(bool aProcessing) {
NS_ASSERTION(aProcessing != bool(mProcessingRestyles),
"should never nest");
mProcessingRestyles = aProcessing;
}
bool IsProcessingAnimationStyleChange() const {
return mProcessingAnimationStyleChange;
}
void SetProcessingAnimationStyleChange(bool aProcessing) {
NS_ASSERTION(aProcessing != bool(mProcessingAnimationStyleChange),
"should never nest");
mProcessingAnimationStyleChange = aProcessing;
}
/**
* Notify the prescontext that the presshell is about to reflow a reflow root.
* The single argument indicates whether this reflow should be interruptible.
* If aInterruptible is false then CheckForInterrupt and HasPendingInterrupt
* will always return false. If aInterruptible is true then CheckForInterrupt
* will return true when a pending event is detected. This is for use by the
* presshell only. Reflow code wanting to prevent interrupts should use
* InterruptPreventer.
*/
void ReflowStarted(bool aInterruptible);
/**
* A class that can be used to temporarily disable reflow interruption.
*/
class InterruptPreventer;
friend class InterruptPreventer;
class MOZ_STACK_CLASS InterruptPreventer {
public:
InterruptPreventer(nsPresContext* aCtx) :
mCtx(aCtx),
mInterruptsEnabled(aCtx->mInterruptsEnabled),
mHasPendingInterrupt(aCtx->mHasPendingInterrupt)
{
mCtx->mInterruptsEnabled = false;
mCtx->mHasPendingInterrupt = false;
}
~InterruptPreventer() {
mCtx->mInterruptsEnabled = mInterruptsEnabled;
mCtx->mHasPendingInterrupt = mHasPendingInterrupt;
}
private:
nsPresContext* mCtx;
bool mInterruptsEnabled;
bool mHasPendingInterrupt;
};
/**
* Check for interrupts. This may return true if a pending event is
* detected. Once it has returned true, it will keep returning true
* until ReflowStarted is called. In all cases where this returns true,
* the passed-in frame (which should be the frame whose reflow will be
* interrupted if true is returned) will be passed to
* nsIPresShell::FrameNeedsToContinueReflow.
*/
bool CheckForInterrupt(nsIFrame* aFrame);
/**
* Returns true if CheckForInterrupt has returned true since the last
* ReflowStarted call. Cannot itself trigger an interrupt check.
*/
bool HasPendingInterrupt() { return mHasPendingInterrupt; }
/**
* If we have a presshell, and if the given content's current
* document is the same as our presshell's document, return the
* content's primary frame. Otherwise, return null. Only use this
* if you care about which presshell the primary frame is in.
*/
nsIFrame* GetPrimaryFrameFor(nsIContent* aContent);
void NotifyDestroyingFrame(nsIFrame* aFrame)
{
PropertyTable()->DeleteAllFor(aFrame);
}
virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
bool IsRootContentDocument();
bool IsCrossProcessRootContentDocument();
bool IsGlyph() const {
return mIsGlyph;
}
void SetIsGlyph(bool aValue) {
mIsGlyph = aValue;
}
bool UsesRootEMUnits() const {
return mUsesRootEMUnits;
}
void SetUsesRootEMUnits(bool aValue) {
mUsesRootEMUnits = aValue;
}
bool UsesViewportUnits() const {
return mUsesViewportUnits;
}
void SetUsesViewportUnits(bool aValue) {
mUsesViewportUnits = aValue;
}
// true if there are OMTA transition updates for the current document which
// have been throttled, and therefore some style information may not be up
// to date
bool ExistThrottledUpdates() const {
return mExistThrottledUpdates;
}
void SetExistThrottledUpdates(bool aExistThrottledUpdates) {
mExistThrottledUpdates = aExistThrottledUpdates;
}
protected:
friend class nsRunnableMethod<nsPresContext>;
NS_HIDDEN_(void) ThemeChangedInternal();
NS_HIDDEN_(void) SysColorChangedInternal();
NS_HIDDEN_(void) UIResolutionChangedInternal();
static NS_HIDDEN_(bool)
UIResolutionChangedSubdocumentCallback(nsIDocument* aDocument, void* aData);
NS_HIDDEN_(void) SetImgAnimations(nsIContent *aParent, uint16_t aMode);
NS_HIDDEN_(void) SetSMILAnimations(nsIDocument *aDoc, uint16_t aNewMode,
uint16_t aOldMode);
NS_HIDDEN_(void) GetDocumentColorPreferences();
NS_HIDDEN_(void) PreferenceChanged(const char* aPrefName);
static NS_HIDDEN_(int) PrefChangedCallback(const char*, void*);
NS_HIDDEN_(void) UpdateAfterPreferencesChanged();
static NS_HIDDEN_(void) PrefChangedUpdateTimerCallback(nsITimer *aTimer, void *aClosure);
NS_HIDDEN_(void) GetUserPreferences();
// Allow nsAutoPtr<LangGroupFontPrefs> dtor to access this protected struct's
// dtor:
struct LangGroupFontPrefs;
friend class nsAutoPtr<LangGroupFontPrefs>;
struct LangGroupFontPrefs {
// Font sizes default to zero; they will be set in GetFontPreferences
LangGroupFontPrefs()
: mLangGroup(nullptr)
, mMinimumFontSize(0)
, mDefaultVariableFont("serif", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL, NS_FONT_STRETCH_NORMAL, 0, 0)
, mDefaultFixedFont("monospace", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0)
, mDefaultSerifFont("serif", NS_FONT_STYLE_NORMAL, NS_FONT_VARIANT_NORMAL,
NS_FONT_WEIGHT_NORMAL, NS_FONT_STRETCH_NORMAL, 0, 0)
, mDefaultSansSerifFont("sans-serif", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0)
, mDefaultMonospaceFont("monospace", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0)
, mDefaultCursiveFont("cursive", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0)
, mDefaultFantasyFont("fantasy", NS_FONT_STYLE_NORMAL,
NS_FONT_VARIANT_NORMAL, NS_FONT_WEIGHT_NORMAL,
NS_FONT_STRETCH_NORMAL, 0, 0)
{}
size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const {
size_t n = 0;
LangGroupFontPrefs *curr = mNext;
while (curr) {
n += aMallocSizeOf(curr);
// Measurement of the following members may be added later if DMD finds
// it is worthwhile:
// - mLangGroup
// - mDefault*Font
curr = curr->mNext;
}
return n;
}
nsCOMPtr<nsIAtom> mLangGroup;
nscoord mMinimumFontSize;
nsFont mDefaultVariableFont;
nsFont mDefaultFixedFont;
nsFont mDefaultSerifFont;
nsFont mDefaultSansSerifFont;
nsFont mDefaultMonospaceFont;
nsFont mDefaultCursiveFont;
nsFont mDefaultFantasyFont;
nsAutoPtr<LangGroupFontPrefs> mNext;
};
/**
* Fetch the user's font preferences for the given aLanguage's
* langugage group.
*/
const LangGroupFontPrefs* GetFontPrefsForLang(nsIAtom *aLanguage) const;
void ResetCachedFontPrefs() {
// Throw away any other LangGroupFontPrefs objects:
mLangGroupFontPrefs.mNext = nullptr;
// Make GetFontPreferences reinitialize mLangGroupFontPrefs:
mLangGroupFontPrefs.mLangGroup = nullptr;
}
NS_HIDDEN_(void) UpdateCharSet(const nsCString& aCharSet);
public:
void DoChangeCharSet(const nsCString& aCharSet);
/**
* Checks for MozAfterPaint listeners on the document
*/
bool MayHavePaintEventListener();
/**
* Checks for MozAfterPaint listeners on the document and
* any subdocuments, except for subdocuments that are non-top-level
* content documents.
*/
bool MayHavePaintEventListenerInSubDocument();
protected:
void InvalidateThebesLayers();
void AppUnitsPerDevPixelChanged();
void HandleRebuildUserFontSet() {
mPostedFlushUserFontSet = false;
FlushUserFontSet();
}
bool HavePendingInputEvent();
// Can't be inline because we can't include nsStyleSet.h.
bool HasCachedStyleData();
bool IsChromeSlow() const;
// IMPORTANT: The ownership implicit in the following member variables
// has been explicitly checked. If you add any members to this class,
// please make the ownership explicit (pinkerton, scc).
nsPresContextType mType;
nsIPresShell* mShell; // [WEAK]
nsCOMPtr<nsIDocument> mDocument;
nsRefPtr<nsDeviceContext> mDeviceContext; // [STRONG] could be weak, but
// better safe than sorry.
// Cannot reintroduce cycles
// since there is no dependency
// from gfx back to layout.
nsRefPtr<nsEventStateManager> mEventManager;
nsRefPtr<nsRefreshDriver> mRefreshDriver;
nsRefPtr<nsTransitionManager> mTransitionManager;
nsRefPtr<nsAnimationManager> mAnimationManager;
nsRefPtr<mozilla::RestyleManager> mRestyleManager;
nsIAtom* mMedium; // initialized by subclass ctors;
// weak pointer to static atom
nsCOMPtr<nsIAtom> mMediaEmulated;
nsILinkHandler* mLinkHandler; // [WEAK]
// Formerly mLangGroup; moving from charset-oriented langGroup to
// maintaining actual language settings everywhere (see bug 524107).
// This may in fact hold a langGroup such as x-western rather than
// a specific language, however (e.g, if it is inferred from the
// charset rather than explicitly specified as a lang attribute).
nsCOMPtr<nsIAtom> mLanguage;
public:
// The following are public member variables so that we can use them
// with mozilla::AutoToggle or mozilla::AutoRestore.
// Should we disable font size inflation because we're inside of
// shrink-wrapping calculations on an inflation container?
bool mInflationDisabledForShrinkWrap;
protected:
nsWeakPtr mContainer;
PRCList mDOMMediaQueryLists;
int32_t mMinFontSize; // Min font size, defaults to 0
float mTextZoom; // Text zoom, defaults to 1.0
float mFullZoom; // Page zoom, defaults to 1.0
float mLastFontInflationScreenWidth;
int32_t mCurAppUnitsPerDevPixel;
int32_t mAutoQualityMinFontSizePixelsPref;
nsCOMPtr<nsITheme> mTheme;
nsCOMPtr<nsILanguageAtomService> mLangService;
nsCOMPtr<nsIPrintSettings> mPrintSettings;
nsCOMPtr<nsITimer> mPrefChangedTimer;
FramePropertyTable mPropertyTable;
nsInvalidateRequestList mInvalidateRequestsSinceLastPaint;
nsInvalidateRequestList mUndeliveredInvalidateRequestsBeforeLastPaint;
// container for per-context fonts (downloadable, SVG, etc.)
nsUserFontSet* mUserFontSet;
nsRect mVisibleArea;
nsSize mPageSize;
float mPageScale;
float mPPScale;
nscolor mDefaultColor;
nscolor mBackgroundColor;
nscolor mLinkColor;
nscolor mActiveLinkColor;
nscolor mVisitedLinkColor;
nscolor mFocusBackgroundColor;
nscolor mFocusTextColor;
nscolor mBodyTextColor;
ScrollbarStyles mViewportStyleOverflow;
uint8_t mFocusRingWidth;
bool mExistThrottledUpdates;
uint16_t mImageAnimationMode;
uint16_t mImageAnimationModePref;
LangGroupFontPrefs mLangGroupFontPrefs;
nscoord mBorderWidthTable[3];
uint32_t mInterruptChecksToSkip;
mozilla::TimeStamp mReflowStartTime;
// last time animations/transition styles were flushed to their primary frames
mozilla::TimeStamp mLastUpdateThrottledStyle;
// last time we did a full style flush
mozilla::TimeStamp mLastStyleUpdateForAllAnimations;
unsigned mHasPendingInterrupt : 1;
unsigned mInterruptsEnabled : 1;
unsigned mUseDocumentFonts : 1;
unsigned mUseDocumentColors : 1;
unsigned mUnderlineLinks : 1;
unsigned mSendAfterPaintToContent : 1;
unsigned mUseFocusColors : 1;
unsigned mFocusRingOnAnything : 1;
unsigned mFocusRingStyle : 1;
unsigned mDrawImageBackground : 1;
unsigned mDrawColorBackground : 1;
unsigned mNeverAnimate : 1;
unsigned mIsRenderingOnlySelection : 1;
unsigned mPaginated : 1;
unsigned mCanPaginatedScroll : 1;
unsigned mDoScaledTwips : 1;
unsigned mEnableJapaneseTransform : 1;
unsigned mIsRootPaginatedDocument : 1;
unsigned mPrefBidiDirection : 1;
unsigned mPrefScrollbarSide : 2;
unsigned mPendingSysColorChanged : 1;
unsigned mPendingThemeChanged : 1;
unsigned mPendingUIResolutionChanged : 1;
unsigned mPendingMediaFeatureValuesChanged : 1;
unsigned mPrefChangePendingNeedsReflow : 1;
unsigned mIsEmulatingMedia : 1;
// True if the requests in mInvalidateRequestsSinceLastPaint cover the
// entire viewport
unsigned mAllInvalidated : 1;
// Are we currently drawing an SVG glyph?
unsigned mIsGlyph : 1;
// Does the associated document use root-em (rem) units?
unsigned mUsesRootEMUnits : 1;
// Does the associated document use viewport units (vw/vh/vmin/vmax)?
unsigned mUsesViewportUnits : 1;
// Has there been a change to the viewport's dimensions?
unsigned mPendingViewportChange : 1;
// Is the current mUserFontSet valid?
unsigned mUserFontSetDirty : 1;
// Has GetUserFontSet() been called?
unsigned mGetUserFontSetCalled : 1;
// Do we currently have an event posted to call FlushUserFontSet?
unsigned mPostedFlushUserFontSet : 1;
// resize reflow is suppressed when the only change has been to zoom
// the document rather than to change the document's dimensions
unsigned mSupressResizeReflow : 1;
unsigned mIsVisual : 1;
unsigned mProcessingRestyles : 1;
unsigned mProcessingAnimationStyleChange : 1;
unsigned mFireAfterPaintEvents : 1;
// Cache whether we are chrome or not because it is expensive.
// mIsChromeIsCached tells us if mIsChrome is valid or we need to get the
// value the slow way.
mutable unsigned mIsChromeIsCached : 1;
mutable unsigned mIsChrome : 1;
// Should we paint flash in this context? Do not use this variable directly.
// Use GetPaintFlashing() method instead.
mutable unsigned mPaintFlashing : 1;
mutable unsigned mPaintFlashingInitialized : 1;
#ifdef DEBUG
bool mInitialized;
#endif
protected:
virtual ~nsPresContext() NS_HIDDEN;
// these are private, use the list in nsFont.h if you want a public list
enum {
eDefaultFont_Variable,
eDefaultFont_Fixed,
eDefaultFont_Serif,
eDefaultFont_SansSerif,
eDefaultFont_Monospace,
eDefaultFont_Cursive,
eDefaultFont_Fantasy,
eDefaultFont_COUNT
};
nscolor MakeColorPref(const nsString& aColor);
void LastRelease();
#ifdef DEBUG
private:
friend struct nsAutoLayoutPhase;
uint32_t mLayoutPhaseCount[eLayoutPhase_COUNT];
public:
uint32_t LayoutPhaseCount(nsLayoutPhase aPhase) {
return mLayoutPhaseCount[aPhase];
}
#endif
};
class nsRootPresContext : public nsPresContext {
public:
nsRootPresContext(nsIDocument* aDocument, nsPresContextType aType) NS_HIDDEN;
virtual ~nsRootPresContext();
/**
* Ensure that NotifyDidPaintForSubtree is eventually called on this
* object after a timeout.
*/
void EnsureEventualDidPaintEvent();
void CancelDidPaintTimer()
{
if (mNotifyDidPaintTimer) {
mNotifyDidPaintTimer->Cancel();
mNotifyDidPaintTimer = nullptr;
}
}
/**
* Registers a plugin to receive geometry updates (position and clip
* region) so it can update its widget.
* Callers must call UnregisterPluginForGeometryUpdates before
* the aPlugin frame is destroyed.
*/
void RegisterPluginForGeometryUpdates(nsIContent* aPlugin);
/**
* Stops a plugin receiving geometry updates (position and clip
* region). If the plugin was not already registered, this does
* nothing.
*/
void UnregisterPluginForGeometryUpdates(nsIContent* aPlugin);
bool NeedToComputePluginGeometryUpdates()
{
return mRegisteredPlugins.Count() > 0;
}
/**
* Compute geometry updates for each plugin given that aList is the display
* list for aFrame. The updates are not yet applied;
* ApplyPluginGeometryUpdates is responsible for that. In the meantime they
* are stored on each nsObjectFrame.
* This needs to be called even when aFrame is a popup, since although
* windowed plugins aren't allowed in popups, windowless plugins are
* and ComputePluginGeometryUpdates needs to be called for them.
*/
void ComputePluginGeometryUpdates(nsIFrame* aFrame,
nsDisplayListBuilder* aBuilder,
nsDisplayList* aList);
/**
* Apply the stored plugin geometry updates. This should normally be called
* in DidPaint so the plugins are moved/clipped immediately after we've
* updated our window, so they look in sync with our window.
*/
void ApplyPluginGeometryUpdates();
virtual bool IsRoot() MOZ_OVERRIDE { return true; }
/**
* Increment DOM-modification generation counter to indicate that
* the DOM has changed in a way that might lead to style changes/
* reflows/frame creation and destruction.
*/
void IncrementDOMGeneration() { mDOMGeneration++; }
/**
* Get the current DOM generation counter.
*
* See nsFrameManagerBase::GetGlobalGenerationNumber() for a
* global generation number.
*/
uint32_t GetDOMGeneration() { return mDOMGeneration; }
/**
* Add a runnable that will get called before the next paint. They will get
* run eventually even if painting doesn't happen. They might run well before
* painting happens.
*/
void AddWillPaintObserver(nsIRunnable* aRunnable);
/**
* Run all runnables that need to get called before the next paint.
*/
void FlushWillPaintObservers();
virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
protected:
/**
* Start a timer to ensure we eventually run ApplyPluginGeometryUpdates.
*/
void InitApplyPluginGeometryTimer();
/**
* Cancel the timer that ensures we eventually run ApplyPluginGeometryUpdates.
*/
void CancelApplyPluginGeometryTimer();
class RunWillPaintObservers : public nsRunnable {
public:
RunWillPaintObservers(nsRootPresContext* aPresContext) : mPresContext(aPresContext) {}
void Revoke() { mPresContext = nullptr; }
NS_IMETHOD Run() MOZ_OVERRIDE
{
if (mPresContext) {
mPresContext->FlushWillPaintObservers();
}
return NS_OK;
}
nsRootPresContext* mPresContext;
};
friend class nsPresContext;
nsCOMPtr<nsITimer> mNotifyDidPaintTimer;
nsCOMPtr<nsITimer> mApplyPluginGeometryTimer;
nsTHashtable<nsRefPtrHashKey<nsIContent> > mRegisteredPlugins;
nsTArray<nsCOMPtr<nsIRunnable> > mWillPaintObservers;
nsRevocableEventPtr<RunWillPaintObservers> mWillPaintFallbackEvent;
uint32_t mDOMGeneration;
};
#ifdef MOZ_REFLOW_PERF
#define DO_GLOBAL_REFLOW_COUNT(_name) \
aPresContext->CountReflows((_name), (nsIFrame*)this);
#else
#define DO_GLOBAL_REFLOW_COUNT(_name)
#endif // MOZ_REFLOW_PERF
#endif /* nsPresContext_h___ */
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