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gecko/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 <mats.palmgren@bredband.net>
* Masayuki Nakano <masayuki@d-toybox.com>
*
* 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 "nsVoidArray.h"
#include "nsStyleCoord.h"
#include "nsStyleConsts.h"
#include "nsChangeHint.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsCOMPtr.h"
#include "nsCOMArray.h"
#include "nsIAtom.h"
#include "nsIURI.h"
#include "nsCSSValue.h"
class nsIFrame;
class imgIRequest;
// Includes nsStyleStructID.
#include "nsStyleStructFwd.h"
// Bits for each struct.
#define NS_STYLE_INHERIT_BIT(sid_) (1 << PRInt32(eStyleStruct_##sid_))
#define NS_STYLE_INHERIT_MASK 0x00ffffff
// Additional bits for nsStyleContext's mBits:
// A bit to test whether or not we have any text decorations.
#define NS_STYLE_HAS_TEXT_DECORATIONS 0x01000000
// 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 actual structs start here
struct nsStyleStruct {
};
// The lifetime of these objects is managed by the presshell's arena.
struct nsStyleFont : public nsStyleStruct {
nsStyleFont(void);
nsStyleFont(const nsFont& aFont);
nsStyleFont(const nsStyleFont& aStyleFont);
nsStyleFont(nsPresContext *aPresContext);
~nsStyleFont(void) {}
nsChangeHint CalcDifference(const nsStyleFont& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
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);
PRUint8 mFlags; // [inherited] See nsStyleConsts.h
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.
};
struct nsStyleColor : public nsStyleStruct {
nsStyleColor(nsPresContext* aPresContext);
nsStyleColor(const nsStyleColor& aOther);
~nsStyleColor(void) {}
nsChangeHint CalcDifference(const nsStyleColor& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
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 : public nsStyleStruct {
nsStyleBackground(nsPresContext* aPresContext);
nsStyleBackground(const nsStyleBackground& aOther);
~nsStyleBackground();
void* operator new(size_t sz, nsPresContext* aContext) CPP_THROW_NEW {
return aContext->AllocateFromShell(sz);
}
void Destroy(nsPresContext* aContext) {
this->~nsStyleBackground();
aContext->FreeToShell(sizeof(nsStyleBackground), this);
}
nsChangeHint CalcDifference(const nsStyleBackground& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
// On Linux (others?), there is an extra byte being used up by
// inheritance so we only have 3 bytes to fit these 6 things into.
// Fortunately, the properties are enums which have few possible
// values.
PRUint8 mBackgroundFlags; // [reset] See nsStyleConsts.h
PRUint8 mBackgroundAttachment : 4; // [reset] See nsStyleConsts.h
PRUint8 mBackgroundClip : 3; // [reset] See nsStyleConsts.h
PRUint8 mBackgroundInlinePolicy : 2; // [reset] See nsStyleConsts.h
PRUint8 mBackgroundOrigin : 3; // [reset] See nsStyleConsts.h
PRUint8 mBackgroundRepeat : 4; // [reset] See nsStyleConsts.h
// Note: a member of this union is valid IFF the appropriate bit flag
// is set in mBackgroundFlags.
union {
nscoord mCoord;
float mFloat;
} mBackgroundXPosition, // [reset]
mBackgroundYPosition; // [reset]
nscolor mBackgroundColor; // [reset]
nsCOMPtr<imgIRequest> mBackgroundImage; // [reset]
PRBool IsTransparent() const
{
return (mBackgroundFlags &
(NS_STYLE_BG_COLOR_TRANSPARENT | NS_STYLE_BG_IMAGE_NONE)) ==
(NS_STYLE_BG_COLOR_TRANSPARENT | NS_STYLE_BG_IMAGE_NONE);
}
// 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>
PRBool HasFixedBackground() const;
};
#define BORDER_COLOR_TRANSPARENT 0x40
#define BORDER_COLOR_FOREGROUND 0x20
#define OUTLINE_COLOR_INITIAL 0x80
// TRANSPARENT | FOREGROUND | INITIAL(OUTLINE)
#define BORDER_COLOR_SPECIAL 0xE0
#define BORDER_STYLE_MASK 0x1F
#define NS_SPACING_MARGIN 0
#define NS_SPACING_PADDING 1
#define NS_SPACING_BORDER 2
struct nsStyleMargin: public nsStyleStruct {
nsStyleMargin(void);
nsStyleMargin(const nsStyleMargin& aMargin);
~nsStyleMargin(void) {}
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
nsStyleSides mMargin; // [reset] length, percent, auto
PRBool GetMargin(nsMargin& aMargin) const
{
if (mHasCachedMargin) {
aMargin = mCachedMargin;
return PR_TRUE;
}
return PR_FALSE;
}
protected:
PRPackedBool mHasCachedMargin;
nsMargin mCachedMargin;
};
struct nsStylePadding: public nsStyleStruct {
nsStylePadding(void);
nsStylePadding(const nsStylePadding& aPadding);
~nsStylePadding(void) {}
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
nsStyleSides mPadding; // [reset] length, percent
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;
PRBool mTransparent;
nsBorderColors* CopyColors() {
nsBorderColors* next = nsnull;
if (mNext)
next = mNext->CopyColors();
return new nsBorderColors(mColor, mTransparent, next);
}
nsBorderColors() :mNext(nsnull) { mColor = NS_RGB(0,0,0); }
nsBorderColors(const nscolor& aColor, PRBool aTransparent, nsBorderColors* aNext=nsnull) {
mColor = aColor;
mTransparent = aTransparent;
mNext = aNext;
}
~nsBorderColors() {
delete mNext;
}
PRBool Equals(nsBorderColors* aOther) {
nsBorderColors* c1 = this;
nsBorderColors* c2 = aOther;
while (c1 && c2) {
if (c1->mColor != c2->mColor ||
c1->mTransparent != c2->mTransparent)
return PR_FALSE;
c1 = c1->mNext;
c2 = c2->mNext;
}
return !c1 && !c2;
}
};
// Border widths are rounded to the nearest 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 : PR_MAX((tpp), ((l) + ((tpp) / 2)) / (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) ? PR_MAX( (tpp), ((l) + ((tpp) / 2)) / (tpp) * (tpp)) : \
PR_MIN(-(tpp), ((l) - ((tpp) / 2)) / (tpp) * (tpp)))
struct nsStyleBorder: public nsStyleStruct {
nsStyleBorder(nsPresContext* aContext);
nsStyleBorder(const nsStyleBorder& aBorder);
~nsStyleBorder(void) {
if (mBorderColors) {
for (PRInt32 i = 0; i < 4; i++)
delete mBorderColors[i];
delete []mBorderColors;
}
}
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
nsStyleSides mBorderRadius; // [reset] length, percent
PRUint8 mFloatEdge; // [reset] see nsStyleConsts.h
nsBorderColors** mBorderColors; // [reset] multiple levels of color for a border.
void EnsureBorderColors() {
if (!mBorderColors) {
mBorderColors = new nsBorderColors*[4];
if (mBorderColors)
for (PRInt32 i = 0; i < 4; i++)
mBorderColors[i] = nsnull;
}
}
void ClearBorderColors(PRUint8 aSide) {
if (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.
static PRBool IsVisibleStyle(PRUint8 aStyle) {
return aStyle != NS_STYLE_BORDER_STYLE_NONE &&
aStyle != NS_STYLE_BORDER_STYLE_HIDDEN;
}
// aBorderWidth is in twips
void SetBorderWidth(PRUint8 aSide, nscoord aBorderWidth)
{
mBorder.side(aSide) = aBorderWidth;
if (IsVisibleStyle(GetBorderStyle(aSide))) {
mActualBorder.side(aSide) =
NS_ROUND_BORDER_TO_PIXELS(aBorderWidth, mTwipsPerPixel);
}
}
// Get the actual border, in twips.
const nsMargin& GetBorder() const
{
return mActualBorder;
}
// Get the actual border width for a particular side, in twips. 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 GetBorderWidth(PRUint8 aSide) const
{
return mActualBorder.side(aSide);
}
// Get the computed border width for a particular side, in twips. 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 GetComputedBorderWidth(PRUint8 aSide) const
{
return mActualBorder.side(aSide) ? mBorder.side(aSide) : 0;
}
PRUint8 GetBorderStyle(PRUint8 aSide) const
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
return (mBorderStyle[aSide] & BORDER_STYLE_MASK);
}
void SetBorderStyle(PRUint8 aSide, PRUint8 aStyle)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderStyle[aSide] &= ~BORDER_STYLE_MASK;
mBorderStyle[aSide] |= (aStyle & BORDER_STYLE_MASK);
if (IsVisibleStyle(aStyle)) {
mActualBorder.side(aSide) =
NS_ROUND_BORDER_TO_PIXELS(mBorder.side(aSide), mTwipsPerPixel);
} else {
mActualBorder.side(aSide) = 0;
}
}
void GetBorderColor(PRUint8 aSide, nscolor& aColor,
PRBool& aTransparent, PRBool& aForeground) const
{
aTransparent = 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
aTransparent = PR_TRUE;
}
void SetBorderColor(PRUint8 aSide, nscolor aColor)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderColor[aSide] = aColor;
mBorderStyle[aSide] &= ~BORDER_COLOR_SPECIAL;
}
void GetCompositeColors(PRInt32 aIndex, nsBorderColors** aColors) const
{
if (!mBorderColors)
*aColors = nsnull;
else
*aColors = mBorderColors[aIndex];
}
void AppendBorderColor(PRInt32 aIndex, nscolor aColor, PRBool aTransparent)
{
NS_ASSERTION(aIndex >= 0 && aIndex <= 3, "bad side for composite border color");
nsBorderColors* colorEntry = new nsBorderColors(aColor, aTransparent);
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 SetBorderTransparent(PRUint8 aSide)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderStyle[aSide] &= ~BORDER_COLOR_SPECIAL;
mBorderStyle[aSide] |= BORDER_COLOR_TRANSPARENT;
}
void SetBorderToForeground(PRUint8 aSide)
{
NS_ASSERTION(aSide <= NS_SIDE_LEFT, "bad side");
mBorderStyle[aSide] &= ~BORDER_COLOR_SPECIAL;
mBorderStyle[aSide] |= BORDER_COLOR_FOREGROUND;
}
protected:
// mActualBorder holds the CSS2.1 actual 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.
nsMargin mActualBorder;
// 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 solely 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.
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
nscoord mTwipsPerPixel;
};
struct nsStyleOutline: public nsStyleStruct {
nsStyleOutline(nsPresContext* aPresContext);
nsStyleOutline(const nsStyleOutline& aOutline);
~nsStyleOutline(void) {}
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
nsStyleSides mOutlineRadius; // [reset] length, percent
// (top=topLeft, right=topRight, bottom=bottomRight, left=bottomLeft)
// Note that these are specified values. You can get the actual values with
// GetOutlineWidth and GetOutlineOffset. You cannot get the computed values
// directly.
nsStyleCoord mOutlineOffset; // [reset] length
nsStyleCoord mOutlineWidth; // [reset] length, enum (see nsStyleConsts.h)
PRBool GetOutlineOffset(nscoord& aOffset) const
{
if (mOutlineOffset.GetUnit() == eStyleUnit_Coord) {
nscoord offset = mOutlineOffset.GetCoordValue();
aOffset = NS_ROUND_OFFSET_TO_PIXELS(offset, mTwipsPerPixel);
return PR_TRUE;
} else {
NS_NOTYETIMPLEMENTED("GetOutlineOffset: eStyleUnit_Chars");
aOffset = 0;
return PR_FALSE;
}
}
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 : public nsStyleStruct {
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
PRUint8 mListStyleType; // [inherited] See nsStyleConsts.h
PRUint8 mListStylePosition; // [inherited]
nsCOMPtr<imgIRequest> mListStyleImage; // [inherited]
nsRect mImageRegion; // [inherited] the rect to use within an image
};
struct nsStylePosition : public nsStyleStruct {
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
nsStyleSides mOffset; // [reset]
nsStyleCoord mWidth; // [reset] coord, percent, auto, enum
nsStyleCoord mMinWidth; // [reset] coord, percent, enum
nsStyleCoord mMaxWidth; // [reset] coord, percent, null, enum
nsStyleCoord mHeight; // [reset] coord, percent, auto
nsStyleCoord mMinHeight; // [reset] coord, percent
nsStyleCoord mMaxHeight; // [reset] coord, percent, null
PRUint8 mBoxSizing; // [reset] see nsStyleConsts.h
nsStyleCoord mZIndex; // [reset]
};
struct nsStyleTextReset : public nsStyleStruct {
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);
}
nsChangeHint CalcDifference(const nsStyleTextReset& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
PRUint8 mTextDecoration; // [reset] see nsStyleConsts.h
PRUint8 mUnicodeBidi; // [reset] see nsStyleConsts.h
nsStyleCoord mVerticalAlign; // [reset] see nsStyleConsts.h for enums
};
struct nsStyleText : public nsStyleStruct {
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
PRUint8 mTextAlign; // [inherited] see nsStyleConsts.h
PRUint8 mTextTransform; // [inherited] see nsStyleConsts.h
PRUint8 mWhiteSpace; // [inherited] see nsStyleConsts.h
nsStyleCoord mLetterSpacing; // [inherited]
nsStyleCoord mLineHeight; // [inherited]
nsStyleCoord mTextIndent; // [inherited]
nsStyleCoord mWordSpacing; // [inherited]
PRBool WhiteSpaceIsSignificant() const {
return mWhiteSpace == NS_STYLE_WHITESPACE_PRE ||
mWhiteSpace == NS_STYLE_WHITESPACE_MOZ_PRE_WRAP;
}
PRBool WhiteSpaceCanWrap() const {
return mWhiteSpace == NS_STYLE_WHITESPACE_NORMAL ||
mWhiteSpace == NS_STYLE_WHITESPACE_MOZ_PRE_WRAP;
}
};
struct nsStyleVisibility : public nsStyleStruct {
nsStyleVisibility(nsPresContext* aPresContext);
nsStyleVisibility(const nsStyleVisibility& aVisibility);
~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
PRUint8 mDirection; // [inherited] see nsStyleConsts.h NS_STYLE_DIRECTION_*
PRUint8 mVisible; // [inherited]
nsCOMPtr<nsIAtom> mLangGroup; // [inherited]
PRBool IsVisible() const {
return (mVisible == NS_STYLE_VISIBILITY_VISIBLE);
}
PRBool IsVisibleOrCollapsed() const {
return ((mVisible == NS_STYLE_VISIBILITY_VISIBLE) ||
(mVisible == NS_STYLE_VISIBILITY_COLLAPSE));
}
};
struct nsStyleDisplay : public nsStyleStruct {
nsStyleDisplay();
nsStyleDisplay(const nsStyleDisplay& aOther);
~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
nsCOMPtr<nsIURI> mBinding; // [reset]
#if 0
// XXX This is how it is defined in the CSS2 spec, but the errata
// changed it to be consistent with the positioning draft and how
// Nav and IE implement it
nsMargin mClip; // [reset] offsets from respective edge
#else
nsRect mClip; // [reset] offsets from upper-left border edge
#endif
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 mClipFlags; // [reset] see nsStyleConsts.h
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);}
PRBool IsPositioned() const {return IsAbsolutelyPositioned() ||
(NS_STYLE_POSITION_RELATIVE == mPosition);}
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);
}
};
struct nsStyleTable: public nsStyleStruct {
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
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: public nsStyleStruct {
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
nsStyleCoord mBorderSpacingX;// [inherited]
nsStyleCoord 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;
nsStyleContentData() : mType(nsStyleContentType(0)) { mContent.mString = nsnull; }
~nsStyleContentData();
nsStyleContentData& operator=(const nsStyleContentData& aOther);
PRBool operator==(const nsStyleContentData& aOther) const;
PRBool operator!=(const nsStyleContentData& aOther) const {
return !(*this == aOther);
}
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 : public nsStyleStruct {
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);
}
nsChangeHint CalcDifference(const nsStyleQuotes& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
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: public nsStyleStruct {
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) {
this->~nsStyleContent();
aContext->FreeToShell(sizeof(nsStyleContent), this);
}
nsChangeHint CalcDifference(const nsStyleContent& aOther) const;
#ifdef DEBUG
static nsChangeHint MaxDifference();
#endif
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]
protected:
PRUint32 mContentCount;
nsStyleContentData* mContents;
PRUint32 mIncrementCount;
nsStyleCounterData* mIncrements;
PRUint32 mResetCount;
nsStyleCounterData* mResets;
};
struct nsStyleUIReset: public nsStyleStruct {
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
PRUint8 mUserSelect; // [reset] (selection-style)
PRUint8 mForceBrokenImageIcon; // [reset] (0 if not forcing, otherwise forcing)
PRUint8 mIMEMode; // [reset]
};
struct nsCursorImage {
nsCOMPtr<imgIRequest> mImage;
PRBool mHaveHotspot;
float mHotspotX, mHotspotY;
nsCursorImage();
};
struct nsStyleUserInterface: public nsStyleStruct {
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
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 : public nsStyleStruct {
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
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
};
struct nsStyleColumn : public nsStyleStruct {
nsStyleColumn();
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
PRUint32 mColumnCount; // [reset] see nsStyleConsts.h
nsStyleCoord mColumnWidth; // [reset]
nsStyleCoord mColumnGap; // [reset]
};
#ifdef MOZ_SVG
enum nsStyleSVGPaintType {
eStyleSVGPaintType_None = 0,
eStyleSVGPaintType_Color,
eStyleSVGPaintType_Server
};
struct nsStyleSVGPaint
{
nsStyleSVGPaintType mType;
union {
nscolor mColor;
nsIURI *mPaintServer;
} mPaint;
nscolor mFallbackColor;
// empty constructor to keep Sun compiler happy
nsStyleSVGPaint() {}
~nsStyleSVGPaint();
nsStyleSVGPaint& operator=(const nsStyleSVGPaint& aOther);
PRBool operator==(const nsStyleSVGPaint& aOther) const;
PRBool operator!=(const nsStyleSVGPaint& aOther) const {
return !(*this == aOther);
}
};
struct nsStyleSVG : public nsStyleStruct {
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
nsStyleSVGPaint mFill; // [inherited]
nsStyleSVGPaint mStroke; // [inherited]
nsCOMPtr<nsIURI> mMarkerEnd; // [inherited]
nsCOMPtr<nsIURI> mMarkerMid; // [inherited]
nsCOMPtr<nsIURI> mMarkerStart; // [inherited]
nsStyleCoord *mStrokeDasharray; // [inherited]
nsStyleCoord mStrokeDashoffset; // [inherited]
nsStyleCoord mStrokeWidth; // [inherited]
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 mPointerEvents; // [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 : public nsStyleStruct {
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
nscolor mStopColor; // [reset]
nscolor mFloodColor; // [reset]
nsCOMPtr<nsIURI> mClipPath; // [reset]
nsCOMPtr<nsIURI> mFilter; // [reset]
nsCOMPtr<nsIURI> mMask; // [reset]
float mStopOpacity; // [reset]
float mFloodOpacity; // [reset]
PRUint8 mDominantBaseline; // [reset] see nsStyleConsts.h
};
#endif
#define BORDER_PRECEDENT_EQUAL 0
#define BORDER_PRECEDENT_LOWER 1
#define BORDER_PRECEDENT_HIGHER 2
struct nsBorderEdges;
/** an encapsulation of border edge info */
struct nsBorderEdge
{
/** the thickness of the edge */
nscoord mWidth;
/** the length of the edge */
nscoord mLength;
nscolor mColor;
/** if this edge is an outside edge, the border infor for the adjacent inside object */
nsBorderEdges * mInsideNeighbor;
PRUint8 mStyle;
/** which side does this edge represent? */
PRUint8 mSide;
nsBorderEdge();
};
inline nsBorderEdge::nsBorderEdge()
{
mWidth=0;
mLength=0;
mStyle=NS_STYLE_BORDER_STYLE_NONE;
mColor=0;
mSide=NS_SIDE_LEFT;
mInsideNeighbor = nsnull;
}
/** an encapsulation of a border defined by its edges
* owner of this struct is responsible for freeing any data stored in mEdges
*/
struct nsBorderEdges
{
nsVoidArray mEdges[4];
nsMargin mMaxBorderWidth;
PRPackedBool mOutsideEdge;
nsBorderEdges();
};
inline nsBorderEdges::nsBorderEdges()
{
mMaxBorderWidth.SizeTo(0,0,0,0);
mOutsideEdge = PR_TRUE;
}
#endif /* nsStyleStruct_h___ */
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