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542 lines
14 KiB
C++
542 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsString.h"
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#include "nsUnitConversion.h"
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#include "nsIContent.h"
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#include "nsIPresContext.h"
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#include "nsIStyleRule.h"
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#include "nsISupportsArray.h"
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#include "nsCRT.h"
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#include "nsIFrame.h"
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//#define DEBUG_REFS
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#ifdef NS_DEBUG
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static PRBool gsDebug = PR_FALSE;
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#else
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static const PRBool gsDebug = PR_FALSE;
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#endif
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static NS_DEFINE_IID(kStyleFontSID, NS_STYLEFONT_SID);
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static NS_DEFINE_IID(kStyleColorSID, NS_STYLECOLOR_SID);
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static NS_DEFINE_IID(kStyleSpacingSID, NS_STYLESPACING_SID);
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static NS_DEFINE_IID(kStyleBorderSID, NS_STYLEBORDER_SID);
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static NS_DEFINE_IID(kStyleListSID, NS_STYLELIST_SID);
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static NS_DEFINE_IID(kStylePositionSID, NS_STYLEPOSITION_SID);
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static NS_DEFINE_IID(kStyleTextSID, NS_STYLETEXT_SID);
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static NS_DEFINE_IID(kStyleDisplaySID, NS_STYLEDISPLAY_SID);
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static NS_DEFINE_IID(kIStyleContextIID, NS_ISTYLECONTEXT_IID);
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// --------------------
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// nsStyleFont
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//
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nsStyleFont::nsStyleFont(const nsFont& aFont)
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: mFont(aFont)
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{ }
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nsStyleFont::~nsStyleFont(void) { }
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struct StyleFontImpl : public nsStyleFont {
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StyleFontImpl(const nsFont& aFont)
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: nsStyleFont(aFont)
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{}
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virtual const nsID& GetID(void)
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{ return kStyleFontSID; }
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virtual void InheritFrom(const nsStyleFont& aCopy);
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private: // These are not allowed
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StyleFontImpl(const StyleFontImpl& aOther);
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StyleFontImpl& operator=(const StyleFontImpl& aOther);
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};
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void StyleFontImpl::InheritFrom(const nsStyleFont& aCopy)
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{
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mFont = aCopy.mFont;
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mThreeD = aCopy.mThreeD;
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}
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// --------------------
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// nsStyleColor
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//
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nsStyleColor::nsStyleColor() { }
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nsStyleColor::~nsStyleColor() { }
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struct StyleColorImpl: public nsStyleColor {
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StyleColorImpl(void)
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{
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mBackgroundAttachment = NS_STYLE_BG_ATTACHMENT_SCROLL;
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mBackgroundFlags = NS_STYLE_BG_COLOR_TRANSPARENT;
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mBackgroundRepeat = NS_STYLE_BG_REPEAT_XY;
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mBackgroundColor = NS_RGB(192,192,192);
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mCursor = NS_STYLE_CURSOR_INHERIT;
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}
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virtual const nsID& GetID(void)
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{ return kStyleColorSID; }
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virtual void InheritFrom(const nsStyleColor& aCopy);
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private: // These are not allowed
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StyleColorImpl(const StyleColorImpl& aOther);
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StyleColorImpl& operator=(const StyleColorImpl& aOther);
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};
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void StyleColorImpl::InheritFrom(const nsStyleColor& aCopy)
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{
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mColor = aCopy.mColor;
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}
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// --------------------
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// nsStyleSpacing
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//
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nsStyleSpacing::nsStyleSpacing(void)
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: mMargin(0, 0, 0, 0),
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mPadding(0, 0, 0, 0),
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mBorderPadding(0, 0, 0, 0)
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{
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}
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struct StyleSpacingImpl: public nsStyleSpacing {
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StyleSpacingImpl(void)
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: nsStyleSpacing()
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{}
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virtual const nsID& GetID(void)
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{ return kStyleSpacingSID; }
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virtual void InheritFrom(const nsStyleSpacing& aCopy);
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};
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void StyleSpacingImpl::InheritFrom(const nsStyleSpacing& aCopy)
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{
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// spacing values not inherited
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}
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// --------------------
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// nsStyleBorder
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//
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nsStyleBorder::nsStyleBorder(void)
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: mSize(0, 0, 0, 0)
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{
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mSizeFlag[0] = mSizeFlag[1] = mSizeFlag[2] = mSizeFlag[3] = NS_STYLE_BORDER_WIDTH_LENGTH_VALUE;
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mStyle[0] = mStyle[1] = mStyle[2] = mStyle[3] = NS_STYLE_BORDER_STYLE_NONE;
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mColor[0] = mColor[1] = mColor[2] = mColor[3] = NS_RGB(0, 0, 0);
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}
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struct StyleBorderImpl: public nsStyleBorder {
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StyleBorderImpl(void)
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: nsStyleBorder()
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{}
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virtual const nsID& GetID(void)
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{ return kStyleBorderSID; }
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virtual void InheritFrom(const nsStyleBorder& aCopy);
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};
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void StyleBorderImpl::InheritFrom(const nsStyleBorder& aCopy)
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{
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// border values not inherited
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}
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// --------------------
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// nsStyleList
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//
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nsStyleList::nsStyleList() { }
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nsStyleList::~nsStyleList() { }
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struct StyleListImpl: public nsStyleList {
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StyleListImpl(void)
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{
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mListStyleType = NS_STYLE_LIST_STYLE_BASIC;
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mListStylePosition = NS_STYLE_LIST_STYLE_POSITION_OUTSIDE;
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}
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virtual const nsID& GetID(void)
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{ return kStyleListSID; }
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virtual void InheritFrom(const nsStyleList& aCopy);
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};
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void StyleListImpl::InheritFrom(const nsStyleList& aCopy)
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{
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mListStyleType = aCopy.mListStyleType;
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mListStyleImage = aCopy.mListStyleImage;
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mListStylePosition = aCopy.mListStylePosition;
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}
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// --------------------
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// nsStylePosition
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//
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nsStylePosition::nsStylePosition() { }
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struct StylePositionImpl: public nsStylePosition {
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StylePositionImpl(void)
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{
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mPosition = NS_STYLE_POSITION_STATIC;
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mOverflow = NS_STYLE_OVERFLOW_VISIBLE;
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mLeftOffset.SetAutoValue();
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mTopOffset.SetAutoValue();
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mWidth.SetAutoValue();
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mHeight.SetAutoValue();
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mZIndex.SetAutoValue();
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mClipFlags = NS_STYLE_CLIP_AUTO;
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mClip.SizeTo(0,0,0,0);
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}
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virtual const nsID& GetID(void)
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{ return kStylePositionSID; }
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virtual void InheritFrom(const nsStylePosition& aCopy);
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private: // These are not allowed
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StylePositionImpl(const StylePositionImpl& aOther);
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StylePositionImpl& operator=(const StylePositionImpl& aOther);
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};
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void StylePositionImpl::InheritFrom(const nsStylePosition& aCopy)
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{
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// positioning values not inherited
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}
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// --------------------
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// nsStyleText
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//
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nsStyleText::nsStyleText() { }
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struct StyleTextImpl: public nsStyleText {
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StyleTextImpl() {
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mTextAlign = NS_STYLE_TEXT_ALIGN_LEFT;
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mTextDecoration = NS_STYLE_TEXT_DECORATION_NONE;
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mTextTransform = NS_STYLE_TEXT_TRANSFORM_NONE;
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mWhiteSpace = NS_STYLE_WHITESPACE_NORMAL;
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mLetterSpacing.SetNormalValue();
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mLineHeight.SetNormalValue();
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mTextIndent.SetCoordValue(0);
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mWordSpacing.SetNormalValue();
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mVerticalAlign.SetIntValue(NS_STYLE_VERTICAL_ALIGN_BASELINE, eStyleUnit_Enumerated);
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}
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virtual const nsID& GetID() {
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return kStyleTextSID;
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}
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virtual void InheritFrom(const nsStyleText& aCopy);
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};
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void StyleTextImpl::InheritFrom(const nsStyleText& aCopy)
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{
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// Properties not listed here are not inherited: mVerticalAlign,
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// mTextDecoration
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mTextAlign = aCopy.mTextAlign;
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mTextTransform = aCopy.mTextTransform;
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mWhiteSpace = aCopy.mWhiteSpace;
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mLetterSpacing = aCopy.mLetterSpacing;
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mLineHeight = aCopy.mLineHeight;
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mTextIndent = aCopy.mTextIndent;
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mWordSpacing = aCopy.mWordSpacing;
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}
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// --------------------
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// nsStyleDisplay
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//
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nsStyleDisplay::nsStyleDisplay() { }
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struct StyleDisplayImpl: public nsStyleDisplay {
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StyleDisplayImpl() {
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mDirection = NS_STYLE_DIRECTION_LTR;
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mDisplay = NS_STYLE_DISPLAY_INLINE;
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mFloats = NS_STYLE_FLOAT_NONE;
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mBreakType = NS_STYLE_CLEAR_NONE;
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mBreakBefore = PR_FALSE;
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mBreakAfter = PR_FALSE;
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}
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virtual const nsID& GetID() {
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return kStyleDisplaySID;
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}
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virtual void InheritFrom(const nsStyleDisplay& aCopy);
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};
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void StyleDisplayImpl::InheritFrom(const nsStyleDisplay& aCopy)
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{
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mDirection = aCopy.mDirection;
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}
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//----------------------------------------------------------------------
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class StyleContextImpl : public nsIStyleContext {
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public:
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StyleContextImpl(nsIStyleContext* aParent, nsISupportsArray* aRules, nsIPresContext* aPresContext);
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~StyleContextImpl();
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void* operator new(size_t sz) {
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void* rv = new char[sz];
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nsCRT::zero(rv, sz);
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return rv;
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}
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NS_DECL_ISUPPORTS
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virtual nsIStyleContext* GetParent(void) const;
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virtual nsISupportsArray* GetStyleRules(void) const;
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virtual PRBool Equals(const nsIStyleContext* aOther) const;
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virtual PRUint32 HashValue(void) const;
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virtual nsStyleStruct* GetData(const nsIID& aSID);
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virtual void InheritFrom(const StyleContextImpl& aParent);
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virtual void RecalcAutomaticData(void);
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nsIStyleContext* mParent;
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PRUint32 mHashValid: 1;
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PRUint32 mHashValue: 31;
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nsISupportsArray* mRules;
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// the style data...
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StyleFontImpl mFont;
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StyleColorImpl mColor;
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StyleSpacingImpl mSpacing;
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StyleBorderImpl mBorder;
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StyleListImpl mList;
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StylePositionImpl mPosition;
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StyleTextImpl mText;
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StyleDisplayImpl mDisplay;
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};
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#ifdef DEBUG_REFS
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static PRInt32 gInstanceCount;
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#endif
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StyleContextImpl::StyleContextImpl(nsIStyleContext* aParent,
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nsISupportsArray* aRules,
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nsIPresContext* aPresContext)
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: mParent(aParent), // weak ref
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mRules(aRules),
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mFont(aPresContext->GetDefaultFont()),
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mColor(),
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mSpacing(),
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mBorder(),
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mList(),
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mPosition(),
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mText(),
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mDisplay()
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{
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NS_INIT_REFCNT();
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NS_IF_ADDREF(mRules);
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if (nsnull != aParent) {
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InheritFrom((StyleContextImpl&)*aParent);
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}
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if (nsnull != mRules) {
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PRInt32 index = mRules->Count();
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while (0 < index) {
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nsIStyleRule* rule = (nsIStyleRule*)mRules->ElementAt(--index);
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rule->MapStyleInto(this, aPresContext);
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NS_RELEASE(rule);
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}
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}
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#ifdef DEBUG_REFS
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++gInstanceCount;
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fprintf(stdout, "%d + StyleContext\n", gInstanceCount);
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#endif
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}
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StyleContextImpl::~StyleContextImpl()
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{
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mParent = nsnull; // weak ref
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NS_IF_RELEASE(mRules);
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#ifdef DEBUG_REFS
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--gInstanceCount;
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fprintf(stdout, "%d - StyleContext\n", gInstanceCount);
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#endif
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}
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NS_IMPL_ISUPPORTS(StyleContextImpl, kIStyleContextIID)
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nsIStyleContext* StyleContextImpl::GetParent(void) const
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{
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NS_IF_ADDREF(mParent);
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return mParent;
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}
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nsISupportsArray* StyleContextImpl::GetStyleRules(void) const
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{
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NS_IF_ADDREF(mRules);
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return mRules;
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}
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PRBool StyleContextImpl::Equals(const nsIStyleContext* aOther) const
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{
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PRBool result = PR_TRUE;
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const StyleContextImpl* other = (StyleContextImpl*)aOther;
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if (other != this) {
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if (mParent != other->mParent) {
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result = PR_FALSE;
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}
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else {
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if ((nsnull != mRules) && (nsnull != other->mRules)) {
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result = mRules->Equals(other->mRules);
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}
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else {
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result = PRBool((nsnull == mRules) && (nsnull == other->mRules));
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}
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}
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}
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return result;
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}
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PRUint32 StyleContextImpl::HashValue(void) const
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{
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if (0 == mHashValid) {
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((StyleContextImpl*)this)->mHashValue = ((nsnull != mParent) ? mParent->HashValue() : 0);
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if (nsnull != mRules) {
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PRInt32 index = mRules->Count();
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while (0 <= --index) {
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nsIStyleRule* rule = (nsIStyleRule*)mRules->ElementAt(index);
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PRUint32 hash = rule->HashValue();
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((StyleContextImpl*)this)->mHashValue ^= (hash & 0x7FFFFFFF);
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NS_RELEASE(rule);
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}
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}
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((StyleContextImpl*)this)->mHashValid = 1;
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}
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return mHashValue;
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}
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nsStyleStruct* StyleContextImpl::GetData(const nsIID& aSID)
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{
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if (aSID.Equals(kStyleFontSID)) {
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return &mFont;
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}
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if (aSID.Equals(kStyleColorSID)) {
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return &mColor;
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}
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if (aSID.Equals(kStyleSpacingSID)) {
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return &mSpacing;
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}
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if (aSID.Equals(kStyleBorderSID)) {
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return &mBorder;
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}
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if (aSID.Equals(kStyleListSID)) {
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return &mList;
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}
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if (aSID.Equals(kStylePositionSID)) {
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return &mPosition;
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}
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if (aSID.Equals(kStyleTextSID)) {
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return &mText;
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}
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if (aSID.Equals(kStyleDisplaySID)) {
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return &mDisplay;
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}
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return nsnull;
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}
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void StyleContextImpl::InheritFrom(const StyleContextImpl& aParent)
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{
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mFont.InheritFrom(aParent.mFont);
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mColor.InheritFrom(aParent.mColor);
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mSpacing.InheritFrom(aParent.mSpacing);
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mBorder.InheritFrom(aParent.mBorder);
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mList.InheritFrom(aParent.mList);
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mText.InheritFrom(aParent.mText);
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mPosition.InheritFrom(aParent.mPosition);
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mDisplay.InheritFrom(aParent.mDisplay);
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}
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static void CalcBorderSize(nscoord& aSize, const nsStyleBorder& aBorder, PRUint8 aSide)
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{
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static const nscoord kBorderSize[3] = // XXX need real numbers here (this is probably wrong anyway)
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{ NS_POINTS_TO_TWIPS_INT(1),
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NS_POINTS_TO_TWIPS_INT(3),
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NS_POINTS_TO_TWIPS_INT(5) };
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PRUint8 style = aBorder.mStyle[aSide];
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if (NS_STYLE_BORDER_STYLE_NONE == style) {
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aSize = 0;
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}
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else {
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PRUint8 flag = aBorder.mSizeFlag[aSide];
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if (flag < NS_STYLE_BORDER_WIDTH_LENGTH_VALUE) {
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aSize = kBorderSize[flag];
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}
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}
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}
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void StyleContextImpl::RecalcAutomaticData(void)
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{
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CalcBorderSize(mBorder.mSize.top, mBorder, NS_SIDE_TOP);
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CalcBorderSize(mBorder.mSize.right, mBorder, NS_SIDE_RIGHT);
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CalcBorderSize(mBorder.mSize.bottom, mBorder, NS_SIDE_BOTTOM);
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CalcBorderSize(mBorder.mSize.left, mBorder, NS_SIDE_LEFT);
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// XXX fixup missing border colors
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mSpacing.mBorder = mBorder.mSize;
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mSpacing.mBorderPadding = mSpacing.mPadding;
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mSpacing.mBorderPadding += mBorder.mSize;
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}
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NS_LAYOUT nsresult
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NS_NewStyleContext(nsIStyleContext** aInstancePtrResult,
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nsISupportsArray* aRules,
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nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParentFrame)
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{
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NS_PRECONDITION(nsnull != aInstancePtrResult, "null ptr");
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if (nsnull == aInstancePtrResult) {
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return NS_ERROR_NULL_POINTER;
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}
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nsIStyleContext* parent = nsnull;
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if (nsnull != aParentFrame) {
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aParentFrame->GetStyleContext(aPresContext, parent);
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NS_ASSERTION(nsnull != parent, "parent frame must have style context");
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}
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StyleContextImpl* context = new StyleContextImpl(parent, aRules, aPresContext);
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NS_IF_RELEASE(parent);
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if (nsnull == context) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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context->RecalcAutomaticData();
|
|
|
|
return context->QueryInterface(kIStyleContextIID, (void **) aInstancePtrResult);
|
|
}
|