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gecko-dev/layout/style/nsStyleStruct.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mats Palmgren <matspal@gmail.com>
* Masayuki Nakano <masayuki@d-toybox.com>
* Rob Arnold <robarnold@mozilla.com>
* Jonathon Jongsma <jonathon.jongsma@collabora.co.uk>, Collabora Ltd.
* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* structs that contain the data provided by nsStyleContext, the
* internal API for computed style data for an element
*/
#ifndef nsStyleStruct_h___
#define nsStyleStruct_h___
#include "nsColor.h"
#include "nsCoord.h"
#include "nsMargin.h"
#include "nsRect.h"
#include "nsFont.h"
#include "nsStyleCoord.h"
#include "nsStyleConsts.h"
#include "nsChangeHint.h"
#include "nsPresContext.h"
#include "nsCOMPtr.h"
#include "nsCOMArray.h"
#include "nsTArray.h"
#include "nsIAtom.h"
#include "nsIURI.h"
#include "nsCSSValue.h"
#include "nsStyleTransformMatrix.h"
#include "nsAlgorithm.h"
#include "imgIRequest.h"
#include "gfxRect.h"
class nsIFrame;
class imgIRequest;
class imgIContainer;
struct nsCSSValueList;
// Includes nsStyleStructID.
#include "nsStyleStructFwd.h"
// Bits for each struct.
// NS_STYLE_INHERIT_BIT defined in nsStyleStructFwd.h
#define NS_STYLE_INHERIT_MASK 0x00ffffff
// Additional bits for nsStyleContext's mBits:
// See nsStyleContext::HasTextDecorations
#define NS_STYLE_HAS_TEXT_DECORATIONS 0x01000000
// See nsStyleContext::HasPseudoElementData.
#define NS_STYLE_HAS_PSEUDO_ELEMENT_DATA 0x02000000
// See nsStyleContext::RelevantLinkIsVisited
#define NS_STYLE_RELEVANT_LINK_VISITED 0x04000000
// See nsStyleContext::IsStyleIfVisited
#define NS_STYLE_IS_STYLE_IF_VISITED 0x08000000
// See nsStyleContext::GetPseudoEnum
#define NS_STYLE_CONTEXT_TYPE_MASK 0xf0000000
#define NS_STYLE_CONTEXT_TYPE_SHIFT 28
// Additional bits for nsRuleNode's mDependentBits:
#define NS_RULE_NODE_GC_MARK 0x02000000
#define NS_RULE_NODE_IS_IMPORTANT 0x08000000
#define NS_RULE_NODE_LEVEL_MASK 0xf0000000
#define NS_RULE_NODE_LEVEL_SHIFT 28
// The lifetime of these objects is managed by the presshell's arena.
// Each struct must implement a static ForceCompare() function returning a
// boolean. Structs that can return a hint that doesn't guarantee that the
// change will be applied to all descendants must return true from
// ForceCompare(), so that we will make sure to compare those structs in
// nsStyleContext::CalcStyleDifference.
struct nsStyleFont {
nsStyleFont(const nsFont& aFont, nsPresContext *aPresContext);
nsStyleFont(const nsStyleFont& aStyleFont);
nsStyleFont(nsPresContext *aPresContext);
~nsStyleFont(void) {
MOZ_COUNT_DTOR(nsStyleFont);
}
nsChangeHint CalcDifference(const nsStyleFont& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
static nsChangeHint CalcFontDifference(const nsFont& aFont1, const nsFont& aFont2);
static nscoord ZoomText(nsPresContext* aPresContext, nscoord aSize);
static nscoord UnZoomText(nsPresContext* aPresContext, nscoord aSize);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW;
void Destroy(nsPresContext* aContext);
nsFont mFont; // [inherited]
nscoord mSize; // [inherited] Our "computed size". Can be different
// from mFont.size which is our "actual size" and is
// enforced to be >= the user's preferred min-size.
// mFont.size should be used for display purposes
// while mSize is the value to return in
// getComputedStyle() for example.
PRUint8 mGenericID; // [inherited] generic CSS font family, if any;
// value is a kGenericFont_* constant, see nsFont.h.
#ifdef MOZ_MATHML
// MathML scriptlevel support
PRInt8 mScriptLevel; // [inherited]
// The value mSize would have had if scriptminsize had never been applied
nscoord mScriptUnconstrainedSize;
nscoord mScriptMinSize; // [inherited] length
float mScriptSizeMultiplier; // [inherited]
#endif
};
struct nsStyleGradientStop {
nsStyleCoord mLocation; // percent, coord, none
nscolor mColor;
};
class nsStyleGradient {
public:
nsStyleGradient();
PRUint8 mShape; // NS_STYLE_GRADIENT_SHAPE_*
PRUint8 mSize; // NS_STYLE_GRADIENT_SIZE_*;
// not used (must be FARTHEST_CORNER) for linear shape
PRPackedBool mRepeating;
nsStyleCoord mBgPosX; // percent, coord, calc, none
nsStyleCoord mBgPosY; // percent, coord, calc, none
nsStyleCoord mAngle; // none, angle
// stops are in the order specified in the stylesheet
nsTArray<nsStyleGradientStop> mStops;
PRBool operator==(const nsStyleGradient& aOther) const;
PRBool operator!=(const nsStyleGradient& aOther) const {
return !(*this == aOther);
};
PRBool IsOpaque();
NS_INLINE_DECL_REFCOUNTING(nsStyleGradient)
private:
~nsStyleGradient() {}
// Not to be implemented
nsStyleGradient(const nsStyleGradient& aOther);
nsStyleGradient& operator=(const nsStyleGradient& aOther);
};
enum nsStyleImageType {
eStyleImageType_Null,
eStyleImageType_Image,
eStyleImageType_Gradient,
eStyleImageType_Element
};
/**
* Represents a paintable image of one of the following types.
* (1) A real image loaded from an external source.
* (2) A CSS linear or radial gradient.
* (3) An element within a document, or an <img>, <video>, or <canvas> element
* not in a document.
* (*) Optionally a crop rect can be set to paint a partial (rectangular)
* region of an image. (Currently, this feature is only supported with an
* image of type (1)).
*
* This struct is currently used only for 'background-image', but it may be
* used by other CSS properties such as 'border-image', 'list-style-image', and
* 'content' in the future (bug 507052).
*/
struct nsStyleImage {
nsStyleImage();
~nsStyleImage();
nsStyleImage(const nsStyleImage& aOther);
nsStyleImage& operator=(const nsStyleImage& aOther);
void SetNull();
void SetImageData(imgIRequest* aImage);
void TrackImage(nsPresContext* aContext);
void UntrackImage(nsPresContext* aContext);
void SetGradientData(nsStyleGradient* aGradient);
void SetElementId(const PRUnichar* aElementId);
void SetCropRect(nsStyleSides* aCropRect);
nsStyleImageType GetType() const {
return mType;
}
imgIRequest* GetImageData() const {
NS_ABORT_IF_FALSE(mType == eStyleImageType_Image, "Data is not an image!");
NS_ABORT_IF_FALSE(mImageTracked,
"Should be tracking any image we're going to use!");
return mImage;
}
nsStyleGradient* GetGradientData() const {
NS_ASSERTION(mType == eStyleImageType_Gradient, "Data is not a gradient!");
return mGradient;
}
const PRUnichar* GetElementId() const {
NS_ASSERTION(mType == eStyleImageType_Element, "Data is not an element!");
return mElementId;
}
nsStyleSides* GetCropRect() const {
NS_ASSERTION(mType == eStyleImageType_Image,
"Only image data can have a crop rect");
return mCropRect;
}
/**
* Compute the actual crop rect in pixels, using the source image bounds.
* The computation involves converting percentage unit to pixel unit and
* clamping each side value to fit in the source image bounds.
* @param aActualCropRect the computed actual crop rect.
* @param aIsEntireImage PR_TRUE iff |aActualCropRect| is identical to the
* source image bounds.
* @return PR_TRUE iff |aActualCropRect| holds a meaningful value.
*/
PRBool ComputeActualCropRect(nsIntRect& aActualCropRect,
PRBool* aIsEntireImage = nsnull) const;
/**
* Requests a decode on the image.
*/
nsresult RequestDecode() const;
/**
* @return PR_TRUE if the item is definitely opaque --- i.e., paints every
* pixel within its bounds opaquely, and the bounds contains at least a pixel.
*/
PRBool IsOpaque() const;
/**
* @return PR_TRUE if this image is fully loaded, and its size is calculated;
* always returns PR_TRUE if |mType| is |eStyleImageType_Gradient| or
* |eStyleImageType_Element|.
*/
PRBool IsComplete() const;
/**
* @return PR_TRUE if it is 100% confident that this image contains no pixel
* to draw.
*/
PRBool IsEmpty() const {
// There are some other cases when the image will be empty, for example
// when the crop rect is empty. However, checking the emptiness of crop
// rect is non-trivial since each side value can be specified with
// percentage unit, which can not be evaluated until the source image size
// is available. Therefore, we currently postpone the evaluation of crop
// rect until the actual rendering time --- alternatively until GetOpaqueRegion()
// is called.
return mType == eStyleImageType_Null;
}
PRBool operator==(const nsStyleImage& aOther) const;
PRBool operator!=(const nsStyleImage& aOther) const {
return !(*this == aOther);
}
private:
void DoCopy(const nsStyleImage& aOther);
nsStyleImageType mType;
union {
imgIRequest* mImage;
nsStyleGradient* mGradient;
PRUnichar* mElementId;
};
// This is _currently_ used only in conjunction with eStyleImageType_Image.
nsAutoPtr<nsStyleSides> mCropRect;
#ifdef DEBUG
bool mImageTracked;
#endif
};
struct nsStyleColor {
nsStyleColor(nsPresContext* aPresContext);
nsStyleColor(const nsStyleColor& aOther);
~nsStyleColor(void) {
MOZ_COUNT_DTOR(nsStyleColor);
}
nsChangeHint CalcDifference(const nsStyleColor& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleColor();
aContext->FreeToShell(sizeof(nsStyleColor), this);
}
// Don't add ANY members to this struct! We can achieve caching in the rule
// tree (rather than the style tree) by letting color stay by itself! -dwh
nscolor mColor; // [inherited]
};
struct nsStyleBackground {
nsStyleBackground();
nsStyleBackground(const nsStyleBackground& aOther);
~nsStyleBackground();
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext);
nsChangeHint CalcDifference(const nsStyleBackground& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
struct Position;
friend struct Position;
struct Position {
struct PositionCoord {
// A 'background-position' can be a linear combination of length
// and percent (thanks to calc(), which can combine them).
nscoord mLength;
float mPercent;
bool operator==(const PositionCoord& aOther) const
{ return mLength == aOther.mLength && mPercent == aOther.mPercent; }
bool operator!=(const PositionCoord& aOther) const
{ return !(*this == aOther); }
};
PositionCoord mXPosition, mYPosition;
// Initialize nothing
Position() {}
// Initialize to initial values
void SetInitialValues();
// True if the effective background image position described by this depends
// on the size of the corresponding frame.
PRBool DependsOnFrameSize() const {
return mXPosition.mPercent != 0.0f || mYPosition.mPercent != 0.0f;
}
bool operator==(const Position& aOther) const {
return mXPosition == aOther.mXPosition &&
mYPosition == aOther.mYPosition;
}
bool operator!=(const Position& aOther) const {
return !(*this == aOther);
}
};
struct Size;
friend struct Size;
struct Size {
struct Dimension {
// A 'background-size' can be a linear combination of length
// and percent (thanks to calc(), which can combine them).
nscoord mLength;
float mPercent;
bool operator==(const Dimension& aOther) const
{ return mLength == aOther.mLength && mPercent == aOther.mPercent; }
bool operator!=(const Dimension& aOther) const
{ return !(*this == aOther); }
};
Dimension mWidth, mHeight;
// Except for eLengthPercentage, Dimension types which might change
// how a layer is painted when the corresponding frame's dimensions
// change *must* precede all dimension types which are agnostic to
// frame size; see DependsOnFrameSize below.
enum DimensionType {
// If one of mWidth and mHeight is eContain or eCover, then both are.
// Also, these two values must equal the corresponding values in
// kBackgroundSizeKTable.
eContain, eCover,
eAuto,
eLengthPercentage,
eDimensionType_COUNT
};
PRUint8 mWidthType, mHeightType;
// True if the effective image size described by this depends on
// the size of the corresponding frame. Gradients depend on the
// frame size when their dimensions are 'auto', images don't; both
// types depend on the frame size when their dimensions are
// 'contain', 'cover', or a percentage.
// -moz-element also depends on the frame size when the dimensions
// are 'auto' since it could be an SVG gradient or pattern which
// behaves exactly like a CSS gradient.
bool DependsOnFrameSize(nsStyleImageType aType) const {
if ((mWidthType == eLengthPercentage && mWidth.mPercent != 0.0f) ||
(mHeightType == eLengthPercentage && mHeight.mPercent != 0.0f)) {
return true;
}
if (aType == eStyleImageType_Image) {
return mWidthType <= eCover || mHeightType <= eCover;
} else {
NS_ABORT_IF_FALSE(aType == eStyleImageType_Gradient ||
aType == eStyleImageType_Element,
"unrecognized image type");
return mWidthType <= eAuto || mHeightType <= eAuto;
}
}
// Initialize nothing
Size() {}
// Initialize to initial values
void SetInitialValues();
bool operator==(const Size& aOther) const;
bool operator!=(const Size& aOther) const {
return !(*this == aOther);
}
};
struct Layer;
friend struct Layer;
struct Layer {
PRUint8 mAttachment; // [reset] See nsStyleConsts.h
PRUint8 mClip; // [reset] See nsStyleConsts.h
PRUint8 mOrigin; // [reset] See nsStyleConsts.h
PRUint8 mRepeat; // [reset] See nsStyleConsts.h
Position mPosition; // [reset]
nsStyleImage mImage; // [reset]
Size mSize; // [reset]
// Initializes only mImage
Layer();
~Layer();
// Register/unregister images with the document. We do this only
// after the dust has settled in ComputeBackgroundData.
void TrackImages(nsPresContext* aContext) {
if (mImage.GetType() == eStyleImageType_Image)
mImage.TrackImage(aContext);
}
void UntrackImages(nsPresContext* aContext) {
if (mImage.GetType() == eStyleImageType_Image)
mImage.UntrackImage(aContext);
}
void SetInitialValues();
// True if the rendering of this layer might change when the size
// of the corresponding frame changes. This is true for any
// non-solid-color background whose position or size depends on
// the frame size. It's also true for SVG images whose root <svg>
// node has a viewBox.
PRBool RenderingMightDependOnFrameSize() const;
// An equality operator that compares the images using URL-equality
// rather than pointer-equality.
PRBool operator==(const Layer& aOther) const;
PRBool operator!=(const Layer& aOther) const {
return !(*this == aOther);
}
};
// The (positive) number of computed values of each property, since
// the lengths of the lists are independent.
PRUint32 mAttachmentCount,
mClipCount,
mOriginCount,
mRepeatCount,
mPositionCount,
mImageCount,
mSizeCount;
// Layers are stored in an array, matching the top-to-bottom order in
// which they are specified in CSS. The number of layers to be used
// should come from the background-image property. We create
// additional |Layer| objects for *any* property, not just
// background-image. This means that the bottommost layer that
// callers in layout care about (which is also the one whose
// background-clip applies to the background-color) may not be last
// layer. In layers below the bottom layer, properties will be
// uninitialized unless their count, above, indicates that they are
// present.
nsAutoTArray<Layer, 1> mLayers;
const Layer& BottomLayer() const { return mLayers[mImageCount - 1]; }
#define NS_FOR_VISIBLE_BACKGROUND_LAYERS_BACK_TO_FRONT(var_, stylebg_) \
for (PRUint32 var_ = (stylebg_)->mImageCount; var_-- != 0; )
nscolor mBackgroundColor; // [reset]
// FIXME: This (now background-break in css3-background) should
// probably move into a different struct so that everything in
// nsStyleBackground is set by the background shorthand.
PRUint8 mBackgroundInlinePolicy; // [reset] See nsStyleConsts.h
// True if this background is completely transparent.
PRBool IsTransparent() const;
// We have to take slower codepaths for fixed background attachment,
// but we don't want to do that when there's no image.
// Not inline because it uses an nsCOMPtr<imgIRequest>
// FIXME: Should be in nsStyleStructInlines.h.
PRBool HasFixedBackground() const;
};
// See https://bugzilla.mozilla.org/show_bug.cgi?id=271586#c43 for why
// this is hard to replace with 'currentColor'.
#define BORDER_COLOR_FOREGROUND 0x20
#define OUTLINE_COLOR_INITIAL 0x80
// FOREGROUND | INITIAL(OUTLINE)
#define BORDER_COLOR_SPECIAL 0xA0
#define BORDER_STYLE_MASK 0x1F
#define NS_SPACING_MARGIN 0
#define NS_SPACING_PADDING 1
#define NS_SPACING_BORDER 2
struct nsStyleMargin {
nsStyleMargin(void);
nsStyleMargin(const nsStyleMargin& aMargin);
~nsStyleMargin(void) {
MOZ_COUNT_DTOR(nsStyleMargin);
}
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW;
void Destroy(nsPresContext* aContext);
void RecalcData();
nsChangeHint CalcDifference(const nsStyleMargin& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_TRUE; }
nsStyleSides mMargin; // [reset] coord, percent, calc, auto
PRBool IsWidthDependent() const { return !mHasCachedMargin; }
PRBool GetMargin(nsMargin& aMargin) const
{
if (mHasCachedMargin) {
aMargin = mCachedMargin;
return PR_TRUE;
}
return PR_FALSE;
}
protected:
PRPackedBool mHasCachedMargin;
nsMargin mCachedMargin;
};
struct nsStylePadding {
nsStylePadding(void);
nsStylePadding(const nsStylePadding& aPadding);
~nsStylePadding(void) {
MOZ_COUNT_DTOR(nsStylePadding);
}
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW;
void Destroy(nsPresContext* aContext);
void RecalcData();
nsChangeHint CalcDifference(const nsStylePadding& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_TRUE; }
nsStyleSides mPadding; // [reset] coord, percent, calc
PRBool IsWidthDependent() const { return !mHasCachedPadding; }
PRBool GetPadding(nsMargin& aPadding) const
{
if (mHasCachedPadding) {
aPadding = mCachedPadding;
return PR_TRUE;
}
return PR_FALSE;
}
protected:
PRPackedBool mHasCachedPadding;
nsMargin mCachedPadding;
};
struct nsBorderColors {
nsBorderColors* mNext;
nscolor mColor;
nsBorderColors() : mNext(nsnull), mColor(NS_RGB(0,0,0)) {}
nsBorderColors(const nscolor& aColor) : mNext(nsnull), mColor(aColor) {}
~nsBorderColors();
nsBorderColors* Clone() const { return Clone(PR_TRUE); }
static PRBool Equal(const nsBorderColors* c1,
const nsBorderColors* c2) {
if (c1 == c2)
return PR_TRUE;
while (c1 && c2) {
if (c1->mColor != c2->mColor)
return PR_FALSE;
c1 = c1->mNext;
c2 = c2->mNext;
}
// both should be NULL if these are equal, otherwise one
// has more colors than another
return !c1 && !c2;
}
private:
nsBorderColors* Clone(PRBool aDeep) const;
};
struct nsCSSShadowItem {
nscoord mXOffset;
nscoord mYOffset;
nscoord mRadius;
nscoord mSpread;
nscolor mColor;
PRPackedBool mHasColor; // Whether mColor should be used
PRPackedBool mInset;
nsCSSShadowItem() : mHasColor(PR_FALSE) {
MOZ_COUNT_CTOR(nsCSSShadowItem);
}
~nsCSSShadowItem() {
MOZ_COUNT_DTOR(nsCSSShadowItem);
}
PRBool operator==(const nsCSSShadowItem& aOther) {
return (mXOffset == aOther.mXOffset &&
mYOffset == aOther.mYOffset &&
mRadius == aOther.mRadius &&
mHasColor == aOther.mHasColor &&
mSpread == aOther.mSpread &&
mInset == aOther.mInset &&
(!mHasColor || mColor == aOther.mColor));
}
PRBool operator!=(const nsCSSShadowItem& aOther) {
return !(*this == aOther);
}
};
class nsCSSShadowArray {
public:
void* operator new(size_t aBaseSize, PRUint32 aArrayLen) {
// We can allocate both this nsCSSShadowArray and the
// actual array in one allocation. The amount of memory to
// allocate is equal to the class's size + the number of bytes for all
// but the first array item (because aBaseSize includes one
// item, see the private declarations)
return ::operator new(aBaseSize +
(aArrayLen - 1) * sizeof(nsCSSShadowItem));
}
nsCSSShadowArray(PRUint32 aArrayLen) :
mLength(aArrayLen)
{
MOZ_COUNT_CTOR(nsCSSShadowArray);
for (PRUint32 i = 1; i < mLength; ++i) {
// Make sure we call the constructors of each nsCSSShadowItem
// (the first one is called for us because we declared it under private)
new (&mArray[i]) nsCSSShadowItem();
}
}
~nsCSSShadowArray() {
MOZ_COUNT_DTOR(nsCSSShadowArray);
for (PRUint32 i = 1; i < mLength; ++i) {
mArray[i].~nsCSSShadowItem();
}
}
PRUint32 Length() const { return mLength; }
nsCSSShadowItem* ShadowAt(PRUint32 i) {
NS_ABORT_IF_FALSE(i < mLength, "Accessing too high an index in the text shadow array!");
return &mArray[i];
}
const nsCSSShadowItem* ShadowAt(PRUint32 i) const {
NS_ABORT_IF_FALSE(i < mLength, "Accessing too high an index in the text shadow array!");
return &mArray[i];
}
NS_INLINE_DECL_REFCOUNTING(nsCSSShadowArray)
private:
PRUint32 mLength;
nsCSSShadowItem mArray[1]; // This MUST be the last item
};
// Border widths are rounded to the nearest-below integer number of pixels,
// but values between zero and one device pixels are always rounded up to
// one device pixel.
#define NS_ROUND_BORDER_TO_PIXELS(l,tpp) \
((l) == 0) ? 0 : NS_MAX((tpp), (l) / (tpp) * (tpp))
// Outline offset is rounded to the nearest integer number of pixels, but values
// between zero and one device pixels are always rounded up to one device pixel.
// Note that the offset can be negative.
#define NS_ROUND_OFFSET_TO_PIXELS(l,tpp) \
(((l) == 0) ? 0 : \
((l) > 0) ? NS_MAX( (tpp), ((l) + ((tpp) / 2)) / (tpp) * (tpp)) : \
NS_MIN(-(tpp), ((l) - ((tpp) / 2)) / (tpp) * (tpp)))
// Returns if the given border style type is visible or not
static PRBool IsVisibleBorderStyle(PRUint8 aStyle)
{
return (aStyle != NS_STYLE_BORDER_STYLE_NONE &&
aStyle != NS_STYLE_BORDER_STYLE_HIDDEN);
}
struct nsStyleBorder {
nsStyleBorder(nsPresContext* aContext);
nsStyleBorder(const nsStyleBorder& aBorder);
~nsStyleBorder();
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW;
void Destroy(nsPresContext* aContext);
nsChangeHint CalcDifference(const nsStyleBorder& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRBool ImageBorderDiffers() const;
nsStyleCorners mBorderRadius; // [reset] coord, percent, calc
nsStyleSides mBorderImageSplit; // [reset] integer, percent
PRUint8 mFloatEdge; // [reset] see nsStyleConsts.h
PRUint8 mBorderImageHFill; // [reset]
PRUint8 mBorderImageVFill; // [reset]
nsBorderColors** mBorderColors; // [reset] multiple levels of color for a border.
nsRefPtr<nsCSSShadowArray> mBoxShadow; // [reset] NULL for 'none'
PRBool mHaveBorderImageWidth; // [reset]
nsMargin mBorderImageWidth; // [reset]
void EnsureBorderColors() {
if (!mBorderColors) {
mBorderColors = new nsBorderColors*[4];
if (mBorderColors)
for (PRInt32 i = 0; i < 4; i++)
mBorderColors[i] = nsnull;
}
}
void ClearBorderColors(mozilla::css::Side aSide) {
if (mBorderColors && mBorderColors[aSide]) {
delete mBorderColors[aSide];
mBorderColors[aSide] = nsnull;
}
}
// Return whether aStyle is a visible style. Invisible styles cause
// the relevant computed border width to be 0.
// Note that this does *not* consider the effects of 'border-image':
// if border-style is none, but there is a loaded border image,
// HasVisibleStyle will be false even though there *is* a border.
PRBool HasVisibleStyle(mozilla::css::Side aSide)
{
return IsVisibleBorderStyle(GetBorderStyle(aSide));
}
// aBorderWidth is in twips
void SetBorderWidth(mozilla::css::Side aSide, nscoord aBorderWidth)
{
nscoord roundedWidth =
NS_ROUND_BORDER_TO_PIXELS(aBorderWidth, mTwipsPerPixel);
mBorder.side(aSide) = roundedWidth;
if (HasVisibleStyle(aSide))
mComputedBorder.side(aSide) = roundedWidth;
}
void SetBorderImageWidthOverride(mozilla::css::Side aSide, nscoord aBorderWidth)
{
mBorderImageWidth.side(aSide) =
NS_ROUND_BORDER_TO_PIXELS(aBorderWidth, mTwipsPerPixel);
}
// Get the actual border, in twips. (If there is no border-image
// loaded, this is the same as GetComputedBorder. If there is a
// border-image loaded, it uses the border-image width overrides if
// present, and otherwise mBorder, which is GetComputedBorder without
// considering border-style: none.)
const nsMargin& GetActualBorder() const;
// Get the computed border (plus rounding). This does consider the
// effects of 'border-style: none', but does not consider
// 'border-image'.
const nsMargin& GetComputedBorder() const
{
return mComputedBorder;
}
// Get the actual border width for a particular side, in appunits. Note that
// this is zero if and only if there is no border to be painted for this
// side. That is, this value takes into account the border style and the
// value is rounded to the nearest device pixel by NS_ROUND_BORDER_TO_PIXELS.
nscoord GetActualBorderWidth(mozilla::css::Side aSide) const
{
return GetActualBorder().side(aSide);
}
PRUint8 GetBorderStyle(mozilla::css::Side aSide) const
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
return (mBorderStyle[aSide] & BORDER_STYLE_MASK);
}
void SetBorderStyle(mozilla::css::Side aSide, PRUint8 aStyle)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderStyle[aSide] &= ~BORDER_STYLE_MASK;
mBorderStyle[aSide] |= (aStyle & BORDER_STYLE_MASK);
mComputedBorder.side(aSide) =
(HasVisibleStyle(aSide) ? mBorder.side(aSide) : 0);
}
// Defined in nsStyleStructInlines.h
inline PRBool IsBorderImageLoaded() const;
inline nsresult RequestDecode();
void GetBorderColor(mozilla::css::Side aSide, nscolor& aColor,
PRBool& aForeground) const
{
aForeground = PR_FALSE;
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
if ((mBorderStyle[aSide] & BORDER_COLOR_SPECIAL) == 0)
aColor = mBorderColor[aSide];
else if (mBorderStyle[aSide] & BORDER_COLOR_FOREGROUND)
aForeground = PR_TRUE;
else
NS_NOTREACHED("OUTLINE_COLOR_INITIAL should not be set here");
}
void SetBorderColor(mozilla::css::Side aSide, nscolor aColor)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderColor[aSide] = aColor;
mBorderStyle[aSide] &= ~BORDER_COLOR_SPECIAL;
}
// These are defined in nsStyleStructInlines.h
inline void SetBorderImage(imgIRequest* aImage);
inline imgIRequest* GetBorderImage() const;
bool HasBorderImage() {return !!mBorderImage;}
void TrackImage(nsPresContext* aContext);
void UntrackImage(nsPresContext* aContext);
// These methods are used for the caller to caches the sub images created during
// a border-image paint operation
inline void SetSubImage(PRUint8 aIndex, imgIContainer* aSubImage) const;
inline imgIContainer* GetSubImage(PRUint8 aIndex) const;
void GetCompositeColors(PRInt32 aIndex, nsBorderColors** aColors) const
{
if (!mBorderColors)
*aColors = nsnull;
else
*aColors = mBorderColors[aIndex];
}
void AppendBorderColor(PRInt32 aIndex, nscolor aColor)
{
NS_ASSERTION(aIndex >= 0 && aIndex <= 3, "bad side for composite border color");
nsBorderColors* colorEntry = new nsBorderColors(aColor);
if (!mBorderColors[aIndex])
mBorderColors[aIndex] = colorEntry;
else {
nsBorderColors* last = mBorderColors[aIndex];
while (last->mNext)
last = last->mNext;
last->mNext = colorEntry;
}
mBorderStyle[aIndex] &= ~BORDER_COLOR_SPECIAL;
}
void SetBorderToForeground(mozilla::css::Side aSide)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderStyle[aSide] &= ~BORDER_COLOR_SPECIAL;
mBorderStyle[aSide] |= BORDER_COLOR_FOREGROUND;
}
#ifdef DEBUG
bool mImageTracked;
#endif
protected:
// mComputedBorder holds the CSS2.1 computed border-width values. In
// particular, these widths take into account the border-style for the
// relevant side and the values are rounded to the nearest device
// pixel. They are also rounded (which is not part of the definition
// of computed values). However, they do *not* take into account the
// presence of border-image. See GetActualBorder above for how to
// really get the actual border.
nsMargin mComputedBorder;
// mBorder holds the nscoord values for the border widths as they would be if
// all the border-style values were visible (not hidden or none). This
// member exists so that when we create structs using the copy
// constructor during style resolution the new structs will know what the
// specified values of the border were in case they have more specific rules
// setting the border style. Note that this isn't quite the CSS specified
// value, since this has had the enumerated border widths converted to
// lengths, and all lengths converted to twips. But it's not quite the
// computed value either. The values are rounded to the nearest device pixel
// We also use these values when we have a loaded border-image that
// does not have width overrides.
nsMargin mBorder;
PRUint8 mBorderStyle[4]; // [reset] See nsStyleConsts.h
nscolor mBorderColor[4]; // [reset] the colors to use for a simple border. not used
// if -moz-border-colors is specified
private:
nsCOMPtr<imgIRequest> mBorderImage; // [reset]
// Cache used by callers for border-image painting
nsCOMArray<imgIContainer> mSubImages;
nscoord mTwipsPerPixel;
nsStyleBorder& operator=(const nsStyleBorder& aOther); // Not to be implemented
};
struct nsStyleOutline {
nsStyleOutline(nsPresContext* aPresContext);
nsStyleOutline(const nsStyleOutline& aOutline);
~nsStyleOutline(void) {
MOZ_COUNT_DTOR(nsStyleOutline);
}
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleOutline();
aContext->FreeToShell(sizeof(nsStyleOutline), this);
}
void RecalcData(nsPresContext* aContext);
nsChangeHint CalcDifference(const nsStyleOutline& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
nsStyleCorners mOutlineRadius; // [reset] coord, percent, calc
// Note that this is a specified value. You can get the actual values
// with GetOutlineWidth. You cannot get the computed value directly.
nsStyleCoord mOutlineWidth; // [reset] coord, enum (see nsStyleConsts.h)
nscoord mOutlineOffset; // [reset]
PRBool GetOutlineWidth(nscoord& aWidth) const
{
if (mHasCachedOutline) {
aWidth = mCachedOutlineWidth;
return PR_TRUE;
}
return PR_FALSE;
}
PRUint8 GetOutlineStyle(void) const
{
return (mOutlineStyle & BORDER_STYLE_MASK);
}
void SetOutlineStyle(PRUint8 aStyle)
{
mOutlineStyle &= ~BORDER_STYLE_MASK;
mOutlineStyle |= (aStyle & BORDER_STYLE_MASK);
}
// PR_FALSE means initial value
PRBool GetOutlineColor(nscolor& aColor) const
{
if ((mOutlineStyle & BORDER_COLOR_SPECIAL) == 0) {
aColor = mOutlineColor;
return PR_TRUE;
}
return PR_FALSE;
}
void SetOutlineColor(nscolor aColor)
{
mOutlineColor = aColor;
mOutlineStyle &= ~BORDER_COLOR_SPECIAL;
}
void SetOutlineInitialColor()
{
mOutlineStyle |= OUTLINE_COLOR_INITIAL;
}
PRBool GetOutlineInitialColor() const
{
return !!(mOutlineStyle & OUTLINE_COLOR_INITIAL);
}
protected:
// This value is the actual value, so it's rounded to the nearest device
// pixel.
nscoord mCachedOutlineWidth;
nscolor mOutlineColor; // [reset]
PRPackedBool mHasCachedOutline;
PRUint8 mOutlineStyle; // [reset] See nsStyleConsts.h
nscoord mTwipsPerPixel;
};
struct nsStyleList {
nsStyleList(void);
nsStyleList(const nsStyleList& aStyleList);
~nsStyleList(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleList();
aContext->FreeToShell(sizeof(nsStyleList), this);
}
nsChangeHint CalcDifference(const nsStyleList& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
imgIRequest* GetListStyleImage() const { return mListStyleImage; }
void SetListStyleImage(imgIRequest* aReq)
{
if (mListStyleImage)
mListStyleImage->UnlockImage();
mListStyleImage = aReq;
if (mListStyleImage)
mListStyleImage->LockImage();
}
PRUint8 mListStyleType; // [inherited] See nsStyleConsts.h
PRUint8 mListStylePosition; // [inherited]
private:
nsCOMPtr<imgIRequest> mListStyleImage; // [inherited]
nsStyleList& operator=(const nsStyleList& aOther); // Not to be implemented
public:
nsRect mImageRegion; // [inherited] the rect to use within an image
};
struct nsStylePosition {
nsStylePosition(void);
nsStylePosition(const nsStylePosition& aOther);
~nsStylePosition(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStylePosition();
aContext->FreeToShell(sizeof(nsStylePosition), this);
}
nsChangeHint CalcDifference(const nsStylePosition& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_TRUE; }
nsStyleSides mOffset; // [reset] coord, percent, calc, auto
nsStyleCoord mWidth; // [reset] coord, percent, enum, calc, auto
nsStyleCoord mMinWidth; // [reset] coord, percent, enum, calc
nsStyleCoord mMaxWidth; // [reset] coord, percent, enum, calc, none
nsStyleCoord mHeight; // [reset] coord, percent, calc, auto
nsStyleCoord mMinHeight; // [reset] coord, percent, calc
nsStyleCoord mMaxHeight; // [reset] coord, percent, calc, none
PRUint8 mBoxSizing; // [reset] see nsStyleConsts.h
nsStyleCoord mZIndex; // [reset] integer, auto
PRBool WidthDependsOnContainer() const
{ return WidthCoordDependsOnContainer(mWidth); }
PRBool MinWidthDependsOnContainer() const
{ return WidthCoordDependsOnContainer(mMinWidth); }
PRBool MaxWidthDependsOnContainer() const
{ return WidthCoordDependsOnContainer(mMaxWidth); }
// Note that these functions count 'auto' as depending on the
// container since that's the case for absolutely positioned elements.
// However, some callers do not care about this case and should check
// for it, since it is the most common case.
// FIXME: We should probably change the assumption to be the other way
// around.
PRBool HeightDependsOnContainer() const
{ return HeightCoordDependsOnContainer(mHeight); }
PRBool MinHeightDependsOnContainer() const
{ return HeightCoordDependsOnContainer(mMinHeight); }
PRBool MaxHeightDependsOnContainer() const
{ return HeightCoordDependsOnContainer(mMaxHeight); }
PRBool OffsetHasPercent(mozilla::css::Side aSide) const
{
return mOffset.Get(aSide).HasPercent();
}
private:
static PRBool WidthCoordDependsOnContainer(const nsStyleCoord &aCoord);
static PRBool HeightCoordDependsOnContainer(const nsStyleCoord &aCoord)
{
return aCoord.GetUnit() == eStyleUnit_Auto || // CSS 2.1, 10.6.4, item (5)
aCoord.HasPercent();
}
};
struct nsStyleTextReset {
nsStyleTextReset(void);
nsStyleTextReset(const nsStyleTextReset& aOther);
~nsStyleTextReset(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleTextReset();
aContext->FreeToShell(sizeof(nsStyleTextReset), this);
}
PRUint8 GetDecorationStyle() const
{
return (mTextDecorationStyle & BORDER_STYLE_MASK);
}
void SetDecorationStyle(PRUint8 aStyle)
{
NS_ABORT_IF_FALSE((aStyle & BORDER_STYLE_MASK) == aStyle,
"style doesn't fit");
mTextDecorationStyle &= ~BORDER_STYLE_MASK;
mTextDecorationStyle |= (aStyle & BORDER_STYLE_MASK);
}
void GetDecorationColor(nscolor& aColor, PRBool& aForeground) const
{
aForeground = PR_FALSE;
if ((mTextDecorationStyle & BORDER_COLOR_SPECIAL) == 0) {
aColor = mTextDecorationColor;
} else if (mTextDecorationStyle & BORDER_COLOR_FOREGROUND) {
aForeground = PR_TRUE;
} else {
NS_NOTREACHED("OUTLINE_COLOR_INITIAL should not be set here");
}
}
void SetDecorationColor(nscolor aColor)
{
mTextDecorationColor = aColor;
mTextDecorationStyle &= ~BORDER_COLOR_SPECIAL;
}
void SetDecorationColorToForeground()
{
mTextDecorationStyle &= ~BORDER_COLOR_SPECIAL;
mTextDecorationStyle |= BORDER_COLOR_FOREGROUND;
}
nsChangeHint CalcDifference(const nsStyleTextReset& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
nsStyleCoord mVerticalAlign; // [reset] coord, percent, calc, enum (see nsStyleConsts.h)
PRUint8 mTextDecoration; // [reset] see nsStyleConsts.h
PRUint8 mUnicodeBidi; // [reset] see nsStyleConsts.h
protected:
PRUint8 mTextDecorationStyle; // [reset] see nsStyleConsts.h
nscolor mTextDecorationColor; // [reset] the colors to use for a decoration lines, not used at currentColor
};
struct nsStyleText {
nsStyleText(void);
nsStyleText(const nsStyleText& aOther);
~nsStyleText(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleText();
aContext->FreeToShell(sizeof(nsStyleText), this);
}
nsChangeHint CalcDifference(const nsStyleText& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRUint8 mTextAlign; // [inherited] see nsStyleConsts.h
PRUint8 mTextTransform; // [inherited] see nsStyleConsts.h
PRUint8 mWhiteSpace; // [inherited] see nsStyleConsts.h
PRUint8 mWordWrap; // [inherited] see nsStyleConsts.h
PRInt32 mTabSize; // [inherited] see nsStyleConsts.h
nsStyleCoord mLetterSpacing; // [inherited] coord, normal
nsStyleCoord mLineHeight; // [inherited] coord, factor, normal
nsStyleCoord mTextIndent; // [inherited] coord, percent, calc
nscoord mWordSpacing; // [inherited]
nsRefPtr<nsCSSShadowArray> mTextShadow; // [inherited] NULL in case of a zero-length
PRBool WhiteSpaceIsSignificant() const {
return mWhiteSpace == NS_STYLE_WHITESPACE_PRE ||
mWhiteSpace == NS_STYLE_WHITESPACE_PRE_WRAP;
}
PRBool NewlineIsSignificant() const {
return mWhiteSpace == NS_STYLE_WHITESPACE_PRE ||
mWhiteSpace == NS_STYLE_WHITESPACE_PRE_WRAP ||
mWhiteSpace == NS_STYLE_WHITESPACE_PRE_LINE;
}
PRBool WhiteSpaceCanWrap() const {
return mWhiteSpace == NS_STYLE_WHITESPACE_NORMAL ||
mWhiteSpace == NS_STYLE_WHITESPACE_PRE_WRAP ||
mWhiteSpace == NS_STYLE_WHITESPACE_PRE_LINE;
}
PRBool WordCanWrap() const {
return WhiteSpaceCanWrap() && mWordWrap == NS_STYLE_WORDWRAP_BREAK_WORD;
}
};
struct nsStyleVisibility {
nsStyleVisibility(nsPresContext* aPresContext);
nsStyleVisibility(const nsStyleVisibility& aVisibility);
~nsStyleVisibility() {
MOZ_COUNT_DTOR(nsStyleVisibility);
}
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleVisibility();
aContext->FreeToShell(sizeof(nsStyleVisibility), this);
}
nsChangeHint CalcDifference(const nsStyleVisibility& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRUint8 mDirection; // [inherited] see nsStyleConsts.h NS_STYLE_DIRECTION_*
PRUint8 mVisible; // [inherited]
nsCOMPtr<nsIAtom> mLanguage; // [inherited]
PRUint8 mPointerEvents; // [inherited] see nsStyleConsts.h
PRBool IsVisible() const {
return (mVisible == NS_STYLE_VISIBILITY_VISIBLE);
}
PRBool IsVisibleOrCollapsed() const {
return ((mVisible == NS_STYLE_VISIBILITY_VISIBLE) ||
(mVisible == NS_STYLE_VISIBILITY_COLLAPSE));
}
};
struct nsTimingFunction {
explicit nsTimingFunction(PRInt32 aTimingFunctionType
= NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE)
{
AssignFromKeyword(aTimingFunctionType);
}
nsTimingFunction(float x1, float y1, float x2, float y2)
: mX1(x1)
, mY1(y1)
, mX2(x2)
, mY2(y2)
{}
float mX1;
float mY1;
float mX2;
float mY2;
PRBool operator==(const nsTimingFunction& aOther) const
{
return !(*this != aOther);
}
PRBool operator!=(const nsTimingFunction& aOther) const
{
return mX1 != aOther.mX1 || mY1 != aOther.mY1 ||
mX2 != aOther.mX2 || mY2 != aOther.mY2;
}
private:
void AssignFromKeyword(PRInt32 aTimingFunctionType);
};
struct nsTransition {
nsTransition() { /* leaves uninitialized; see also SetInitialValues */ }
explicit nsTransition(const nsTransition& aCopy);
void SetInitialValues();
// Delay and Duration are in milliseconds
nsTimingFunction& GetTimingFunction() { return mTimingFunction; }
const nsTimingFunction& GetTimingFunction() const { return mTimingFunction; }
float GetDelay() const { return mDelay; }
float GetDuration() const { return mDuration; }
nsCSSProperty GetProperty() const { return mProperty; }
nsIAtom* GetUnknownProperty() const { return mUnknownProperty; }
void SetTimingFunction(const nsTimingFunction& aTimingFunction)
{ mTimingFunction = aTimingFunction; }
void SetDelay(float aDelay) { mDelay = aDelay; }
void SetDuration(float aDuration) { mDuration = aDuration; }
void SetProperty(nsCSSProperty aProperty)
{
NS_ASSERTION(aProperty != eCSSProperty_UNKNOWN, "invalid property");
mProperty = aProperty;
}
void SetUnknownProperty(const nsAString& aUnknownProperty);
void CopyPropertyFrom(const nsTransition& aOther)
{
mProperty = aOther.mProperty;
mUnknownProperty = aOther.mUnknownProperty;
}
private:
nsTimingFunction mTimingFunction;
float mDuration;
float mDelay;
nsCSSProperty mProperty;
nsCOMPtr<nsIAtom> mUnknownProperty; // used when mProperty is
// eCSSProperty_UNKNOWN
};
struct nsStyleDisplay {
nsStyleDisplay();
nsStyleDisplay(const nsStyleDisplay& aOther);
~nsStyleDisplay() {
MOZ_COUNT_DTOR(nsStyleDisplay);
}
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleDisplay();
aContext->FreeToShell(sizeof(nsStyleDisplay), this);
}
nsChangeHint CalcDifference(const nsStyleDisplay& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_TRUE; }
// We guarantee that if mBinding is non-null, so are mBinding->mURI and
// mBinding->mOriginPrincipal.
nsRefPtr<nsCSSValue::URL> mBinding; // [reset]
nsRect mClip; // [reset] offsets from upper-left border edge
float mOpacity; // [reset]
PRUint8 mDisplay; // [reset] see nsStyleConsts.h NS_STYLE_DISPLAY_*
PRUint8 mOriginalDisplay; // [reset] saved mDisplay for position:absolute/fixed
PRUint8 mAppearance; // [reset]
PRUint8 mPosition; // [reset] see nsStyleConsts.h
PRUint8 mFloats; // [reset] see nsStyleConsts.h NS_STYLE_FLOAT_*
PRUint8 mBreakType; // [reset] see nsStyleConsts.h NS_STYLE_CLEAR_*
PRPackedBool mBreakBefore; // [reset]
PRPackedBool mBreakAfter; // [reset]
PRUint8 mOverflowX; // [reset] see nsStyleConsts.h
PRUint8 mOverflowY; // [reset] see nsStyleConsts.h
PRUint8 mResize; // [reset] see nsStyleConsts.h
PRUint8 mClipFlags; // [reset] see nsStyleConsts.h
// mSpecifiedTransform is the list of transform functions as
// specified, or null to indicate there is no transform. (inherit or
// initial are replaced by an actual list of transform functions, or
// null, as appropriate.) (owned by the style rule)
const nsCSSValueList *mSpecifiedTransform; // [reset]
nsStyleTransformMatrix mTransform; // [reset] The stored transform matrix
nsStyleCoord mTransformOrigin[2]; // [reset] percent, coord, calc
nsAutoTArray<nsTransition, 1> mTransitions; // [reset]
// The number of elements in mTransitions that are not from repeating
// a list due to another property being longer.
PRUint32 mTransitionTimingFunctionCount,
mTransitionDurationCount,
mTransitionDelayCount,
mTransitionPropertyCount;
PRBool IsBlockInside() const {
return NS_STYLE_DISPLAY_BLOCK == mDisplay ||
NS_STYLE_DISPLAY_LIST_ITEM == mDisplay ||
NS_STYLE_DISPLAY_INLINE_BLOCK == mDisplay;
// Should TABLE_CELL and TABLE_CAPTION go here? They have
// block frames nested inside of them.
// (But please audit all callers before changing.)
}
PRBool IsBlockOutside() const {
return NS_STYLE_DISPLAY_BLOCK == mDisplay ||
NS_STYLE_DISPLAY_LIST_ITEM == mDisplay ||
NS_STYLE_DISPLAY_TABLE == mDisplay;
}
PRBool IsInlineOutside() const {
return NS_STYLE_DISPLAY_INLINE == mDisplay ||
NS_STYLE_DISPLAY_INLINE_BLOCK == mDisplay ||
NS_STYLE_DISPLAY_INLINE_TABLE == mDisplay ||
NS_STYLE_DISPLAY_INLINE_BOX == mDisplay ||
NS_STYLE_DISPLAY_INLINE_GRID == mDisplay ||
NS_STYLE_DISPLAY_INLINE_STACK == mDisplay;
}
PRBool IsFloating() const {
return NS_STYLE_FLOAT_NONE != mFloats;
}
PRBool IsAbsolutelyPositioned() const {return (NS_STYLE_POSITION_ABSOLUTE == mPosition) ||
(NS_STYLE_POSITION_FIXED == mPosition);}
/* Returns true if we're positioned or there's a transform in effect. */
PRBool IsPositioned() const {
return IsAbsolutelyPositioned() ||
NS_STYLE_POSITION_RELATIVE == mPosition || HasTransform();
}
PRBool IsScrollableOverflow() const {
// mOverflowX and mOverflowY always match when one of them is
// NS_STYLE_OVERFLOW_VISIBLE or NS_STYLE_OVERFLOW_CLIP.
return mOverflowX != NS_STYLE_OVERFLOW_VISIBLE &&
mOverflowX != NS_STYLE_OVERFLOW_CLIP;
}
// For table elements that don't support scroll frame creation, we
// support 'overflow: hidden' to mean 'overflow: -moz-hidden-unscrollable'.
PRBool IsTableClip() const {
return mOverflowX == NS_STYLE_OVERFLOW_CLIP ||
(mOverflowX == NS_STYLE_OVERFLOW_HIDDEN &&
mOverflowY == NS_STYLE_OVERFLOW_HIDDEN);
}
/* Returns whether the element has the -moz-transform property. */
PRBool HasTransform() const {
return mSpecifiedTransform != nsnull;
}
};
struct nsStyleTable {
nsStyleTable(void);
nsStyleTable(const nsStyleTable& aOther);
~nsStyleTable(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleTable();
aContext->FreeToShell(sizeof(nsStyleTable), this);
}
nsChangeHint CalcDifference(const nsStyleTable& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRUint8 mLayoutStrategy;// [reset] see nsStyleConsts.h NS_STYLE_TABLE_LAYOUT_*
PRUint8 mFrame; // [reset] see nsStyleConsts.h NS_STYLE_TABLE_FRAME_*
PRUint8 mRules; // [reset] see nsStyleConsts.h NS_STYLE_TABLE_RULES_*
PRInt32 mCols; // [reset] an integer if set, or see nsStyleConsts.h NS_STYLE_TABLE_COLS_*
PRInt32 mSpan; // [reset] the number of columns spanned by a colgroup or col
};
struct nsStyleTableBorder {
nsStyleTableBorder(nsPresContext* aContext);
nsStyleTableBorder(const nsStyleTableBorder& aOther);
~nsStyleTableBorder(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleTableBorder();
aContext->FreeToShell(sizeof(nsStyleTableBorder), this);
}
nsChangeHint CalcDifference(const nsStyleTableBorder& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
nscoord mBorderSpacingX;// [inherited]
nscoord mBorderSpacingY;// [inherited]
PRUint8 mBorderCollapse;// [inherited]
PRUint8 mCaptionSide; // [inherited]
PRUint8 mEmptyCells; // [inherited]
};
enum nsStyleContentType {
eStyleContentType_String = 1,
eStyleContentType_Image = 10,
eStyleContentType_Attr = 20,
eStyleContentType_Counter = 30,
eStyleContentType_Counters = 31,
eStyleContentType_OpenQuote = 40,
eStyleContentType_CloseQuote = 41,
eStyleContentType_NoOpenQuote = 42,
eStyleContentType_NoCloseQuote = 43,
eStyleContentType_AltContent = 50
};
struct nsStyleContentData {
nsStyleContentType mType;
union {
PRUnichar *mString;
imgIRequest *mImage;
nsCSSValue::Array* mCounters;
} mContent;
#ifdef DEBUG
bool mImageTracked;
#endif
nsStyleContentData()
: mType(nsStyleContentType(0))
#ifdef DEBUG
, mImageTracked(false)
#endif
{ mContent.mString = nsnull; }
~nsStyleContentData();
nsStyleContentData& operator=(const nsStyleContentData& aOther);
PRBool operator==(const nsStyleContentData& aOther) const;
PRBool operator!=(const nsStyleContentData& aOther) const {
return !(*this == aOther);
}
void TrackImage(nsPresContext* aContext);
void UntrackImage(nsPresContext* aContext);
void SetImage(imgIRequest* aRequest)
{
NS_ABORT_IF_FALSE(!mImageTracked,
"Setting a new image without untracking the old one!");
NS_ABORT_IF_FALSE(mType == eStyleContentType_Image, "Wrong type!");
NS_IF_ADDREF(mContent.mImage = aRequest);
}
private:
nsStyleContentData(const nsStyleContentData&); // not to be implemented
};
struct nsStyleCounterData {
nsString mCounter;
PRInt32 mValue;
};
#define DELETE_ARRAY_IF(array) if (array) { delete[] array; array = nsnull; }
struct nsStyleQuotes {
nsStyleQuotes();
nsStyleQuotes(const nsStyleQuotes& aQuotes);
~nsStyleQuotes();
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleQuotes();
aContext->FreeToShell(sizeof(nsStyleQuotes), this);
}
void SetInitial();
void CopyFrom(const nsStyleQuotes& aSource);
nsChangeHint CalcDifference(const nsStyleQuotes& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRUint32 QuotesCount(void) const { return mQuotesCount; } // [inherited]
const nsString* OpenQuoteAt(PRUint32 aIndex) const
{
NS_ASSERTION(aIndex < mQuotesCount, "out of range");
return mQuotes + (aIndex * 2);
}
const nsString* CloseQuoteAt(PRUint32 aIndex) const
{
NS_ASSERTION(aIndex < mQuotesCount, "out of range");
return mQuotes + (aIndex * 2 + 1);
}
nsresult GetQuotesAt(PRUint32 aIndex, nsString& aOpen, nsString& aClose) const {
if (aIndex < mQuotesCount) {
aIndex *= 2;
aOpen = mQuotes[aIndex];
aClose = mQuotes[++aIndex];
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsresult AllocateQuotes(PRUint32 aCount) {
if (aCount != mQuotesCount) {
DELETE_ARRAY_IF(mQuotes);
if (aCount) {
mQuotes = new nsString[aCount * 2];
if (! mQuotes) {
mQuotesCount = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
}
mQuotesCount = aCount;
}
return NS_OK;
}
nsresult SetQuotesAt(PRUint32 aIndex, const nsString& aOpen, const nsString& aClose) {
if (aIndex < mQuotesCount) {
aIndex *= 2;
mQuotes[aIndex] = aOpen;
mQuotes[++aIndex] = aClose;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
protected:
PRUint32 mQuotesCount;
nsString* mQuotes;
};
struct nsStyleContent {
nsStyleContent(void);
nsStyleContent(const nsStyleContent& aContent);
~nsStyleContent(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext);
nsChangeHint CalcDifference(const nsStyleContent& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRUint32 ContentCount(void) const { return mContentCount; } // [reset]
const nsStyleContentData& ContentAt(PRUint32 aIndex) const {
NS_ASSERTION(aIndex < mContentCount, "out of range");
return mContents[aIndex];
}
nsStyleContentData& ContentAt(PRUint32 aIndex) {
NS_ASSERTION(aIndex < mContentCount, "out of range");
return mContents[aIndex];
}
nsresult AllocateContents(PRUint32 aCount);
PRUint32 CounterIncrementCount(void) const { return mIncrementCount; } // [reset]
const nsStyleCounterData* GetCounterIncrementAt(PRUint32 aIndex) const {
NS_ASSERTION(aIndex < mIncrementCount, "out of range");
return &mIncrements[aIndex];
}
nsresult AllocateCounterIncrements(PRUint32 aCount) {
if (aCount != mIncrementCount) {
DELETE_ARRAY_IF(mIncrements);
if (aCount) {
mIncrements = new nsStyleCounterData[aCount];
if (! mIncrements) {
mIncrementCount = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
}
mIncrementCount = aCount;
}
return NS_OK;
}
nsresult SetCounterIncrementAt(PRUint32 aIndex, const nsString& aCounter, PRInt32 aIncrement) {
if (aIndex < mIncrementCount) {
mIncrements[aIndex].mCounter = aCounter;
mIncrements[aIndex].mValue = aIncrement;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
PRUint32 CounterResetCount(void) const { return mResetCount; } // [reset]
const nsStyleCounterData* GetCounterResetAt(PRUint32 aIndex) const {
NS_ASSERTION(aIndex < mResetCount, "out of range");
return &mResets[aIndex];
}
nsresult AllocateCounterResets(PRUint32 aCount) {
if (aCount != mResetCount) {
DELETE_ARRAY_IF(mResets);
if (aCount) {
mResets = new nsStyleCounterData[aCount];
if (! mResets) {
mResetCount = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
}
mResetCount = aCount;
}
return NS_OK;
}
nsresult SetCounterResetAt(PRUint32 aIndex, const nsString& aCounter, PRInt32 aValue) {
if (aIndex < mResetCount) {
mResets[aIndex].mCounter = aCounter;
mResets[aIndex].mValue = aValue;
return NS_OK;
}
return NS_ERROR_ILLEGAL_VALUE;
}
nsStyleCoord mMarkerOffset; // [reset] coord, auto
protected:
nsStyleContentData* mContents;
nsStyleCounterData* mIncrements;
nsStyleCounterData* mResets;
PRUint32 mContentCount;
PRUint32 mIncrementCount;
PRUint32 mResetCount;
};
struct nsStyleUIReset {
nsStyleUIReset(void);
nsStyleUIReset(const nsStyleUIReset& aOther);
~nsStyleUIReset(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleUIReset();
aContext->FreeToShell(sizeof(nsStyleUIReset), this);
}
nsChangeHint CalcDifference(const nsStyleUIReset& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRUint8 mUserSelect; // [reset] (selection-style)
PRUint8 mForceBrokenImageIcon; // [reset] (0 if not forcing, otherwise forcing)
PRUint8 mIMEMode; // [reset]
PRUint8 mWindowShadow; // [reset]
};
struct nsCursorImage {
PRBool mHaveHotspot;
float mHotspotX, mHotspotY;
nsCursorImage();
nsCursorImage(const nsCursorImage& aOther);
~nsCursorImage();
nsCursorImage& operator=(const nsCursorImage& aOther);
/*
* We hide mImage and force access through the getter and setter so that we
* can lock the images we use. Cursor images are likely to be small, so we
* don't care about discarding them. See bug 512260.
* */
void SetImage(imgIRequest *aImage) {
if (mImage)
mImage->UnlockImage();
mImage = aImage;
if (mImage)
mImage->LockImage();
}
imgIRequest* GetImage() const {
return mImage;
}
private:
nsCOMPtr<imgIRequest> mImage;
};
struct nsStyleUserInterface {
nsStyleUserInterface(void);
nsStyleUserInterface(const nsStyleUserInterface& aOther);
~nsStyleUserInterface(void);
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleUserInterface();
aContext->FreeToShell(sizeof(nsStyleUserInterface), this);
}
nsChangeHint CalcDifference(const nsStyleUserInterface& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRUint8 mUserInput; // [inherited]
PRUint8 mUserModify; // [inherited] (modify-content)
PRUint8 mUserFocus; // [inherited] (auto-select)
PRUint8 mCursor; // [inherited] See nsStyleConsts.h
PRUint32 mCursorArrayLength;
nsCursorImage *mCursorArray;// [inherited] The specified URL values
// and coordinates. Takes precedence over
// mCursor. Zero-length array is represented
// by null pointer.
// Does not free mCursorArray; the caller is responsible for calling
// |delete [] mCursorArray| first if it is needed.
void CopyCursorArrayFrom(const nsStyleUserInterface& aSource);
};
struct nsStyleXUL {
nsStyleXUL();
nsStyleXUL(const nsStyleXUL& aSource);
~nsStyleXUL();
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleXUL();
aContext->FreeToShell(sizeof(nsStyleXUL), this);
}
nsChangeHint CalcDifference(const nsStyleXUL& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
float mBoxFlex; // [reset] see nsStyleConsts.h
PRUint32 mBoxOrdinal; // [reset] see nsStyleConsts.h
PRUint8 mBoxAlign; // [reset] see nsStyleConsts.h
PRUint8 mBoxDirection; // [reset] see nsStyleConsts.h
PRUint8 mBoxOrient; // [reset] see nsStyleConsts.h
PRUint8 mBoxPack; // [reset] see nsStyleConsts.h
PRPackedBool mStretchStack; // [reset] see nsStyleConsts.h
};
struct nsStyleColumn {
nsStyleColumn(nsPresContext* aPresContext);
nsStyleColumn(const nsStyleColumn& aSource);
~nsStyleColumn();
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleColumn();
aContext->FreeToShell(sizeof(nsStyleColumn), this);
}
nsChangeHint CalcDifference(const nsStyleColumn& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
PRUint32 mColumnCount; // [reset] see nsStyleConsts.h
nsStyleCoord mColumnWidth; // [reset] coord, auto
nsStyleCoord mColumnGap; // [reset] coord, normal
nscolor mColumnRuleColor; // [reset]
PRUint8 mColumnRuleStyle; // [reset]
// See https://bugzilla.mozilla.org/show_bug.cgi?id=271586#c43 for why
// this is hard to replace with 'currentColor'.
PRPackedBool mColumnRuleColorIsForeground;
void SetColumnRuleWidth(nscoord aWidth) {
mColumnRuleWidth = NS_ROUND_BORDER_TO_PIXELS(aWidth, mTwipsPerPixel);
}
nscoord GetComputedColumnRuleWidth() const {
return (IsVisibleBorderStyle(mColumnRuleStyle) ? mColumnRuleWidth : 0);
}
protected:
nscoord mColumnRuleWidth; // [reset] coord
nscoord mTwipsPerPixel;
};
enum nsStyleSVGPaintType {
eStyleSVGPaintType_None = 1,
eStyleSVGPaintType_Color,
eStyleSVGPaintType_Server
};
struct nsStyleSVGPaint
{
union {
nscolor mColor;
nsIURI *mPaintServer;
} mPaint;
nsStyleSVGPaintType mType;
nscolor mFallbackColor;
nsStyleSVGPaint() : mType(nsStyleSVGPaintType(0)) { mPaint.mPaintServer = nsnull; }
~nsStyleSVGPaint();
void SetType(nsStyleSVGPaintType aType);
nsStyleSVGPaint& operator=(const nsStyleSVGPaint& aOther);
PRBool operator==(const nsStyleSVGPaint& aOther) const;
PRBool operator!=(const nsStyleSVGPaint& aOther) const {
return !(*this == aOther);
}
};
struct nsStyleSVG {
nsStyleSVG();
nsStyleSVG(const nsStyleSVG& aSource);
~nsStyleSVG();
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleSVG();
aContext->FreeToShell(sizeof(nsStyleSVG), this);
}
nsChangeHint CalcDifference(const nsStyleSVG& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
nsStyleSVGPaint mFill; // [inherited]
nsStyleSVGPaint mStroke; // [inherited]
nsCOMPtr<nsIURI> mMarkerEnd; // [inherited]
nsCOMPtr<nsIURI> mMarkerMid; // [inherited]
nsCOMPtr<nsIURI> mMarkerStart; // [inherited]
nsStyleCoord *mStrokeDasharray; // [inherited] coord, percent, factor
nsStyleCoord mStrokeDashoffset; // [inherited] coord, percent, factor
nsStyleCoord mStrokeWidth; // [inherited] coord, percent, factor
float mFillOpacity; // [inherited]
float mStrokeMiterlimit; // [inherited]
float mStrokeOpacity; // [inherited]
PRUint32 mStrokeDasharrayLength;
PRUint8 mClipRule; // [inherited]
PRUint8 mColorInterpolation; // [inherited] see nsStyleConsts.h
PRUint8 mColorInterpolationFilters; // [inherited] see nsStyleConsts.h
PRUint8 mFillRule; // [inherited] see nsStyleConsts.h
PRUint8 mImageRendering; // [inherited] see nsStyleConsts.h
PRUint8 mShapeRendering; // [inherited] see nsStyleConsts.h
PRUint8 mStrokeLinecap; // [inherited] see nsStyleConsts.h
PRUint8 mStrokeLinejoin; // [inherited] see nsStyleConsts.h
PRUint8 mTextAnchor; // [inherited] see nsStyleConsts.h
PRUint8 mTextRendering; // [inherited] see nsStyleConsts.h
};
struct nsStyleSVGReset {
nsStyleSVGReset();
nsStyleSVGReset(const nsStyleSVGReset& aSource);
~nsStyleSVGReset();
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleSVGReset();
aContext->FreeToShell(sizeof(nsStyleSVGReset), this);
}
nsChangeHint CalcDifference(const nsStyleSVGReset& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
static PRBool ForceCompare() { return PR_FALSE; }
nsCOMPtr<nsIURI> mClipPath; // [reset]
nsCOMPtr<nsIURI> mFilter; // [reset]
nsCOMPtr<nsIURI> mMask; // [reset]
nscolor mStopColor; // [reset]
nscolor mFloodColor; // [reset]
nscolor mLightingColor; // [reset]
float mStopOpacity; // [reset]
float mFloodOpacity; // [reset]
PRUint8 mDominantBaseline; // [reset] see nsStyleConsts.h
};
#endif /* nsStyleStruct_h___ */
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