зеркало из https://github.com/mozilla/pjs.git
1007 строки
38 KiB
C++
1007 строки
38 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is nsCSSDataBlock.cpp.
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*
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* The Initial Developer of the Original Code is L. David Baron.
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* Portions created by the Initial Developer are Copyright (C) 2003
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org> (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* compact representation of the property-value pairs within a CSS
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* declaration, and the code for expanding and compacting it
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*/
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#include "nsCSSDataBlock.h"
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#include "nsCSSProps.h"
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#include "nsRuleData.h"
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#include "nsRuleNode.h"
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#include "nsStyleSet.h"
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#include "nsStyleContext.h"
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/*
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* nsCSSCompressedDataBlock holds property-value pairs corresponding to
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* CSS declaration blocks. The value is stored in one of the five CSS
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* data types: nsCSSValue, nsCSSRect, nsCSSValueList, nsCSSValuePair,
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* and nsCSSValuePairList, which each correspond to a value of the
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* nsCSSType enumeration.
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*
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* The storage strategy uses the CDB*Storage structs below to help
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* ensure that all the types remain properly aligned. nsCSSValue's
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* alignment requirements cannot be weaker than any others, since it
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* contains a pointer and an enumeration.
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*
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* The simple types, nsCSSValue and nsCSSRect have the nsCSSValue or
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* nsCSSRect objects stored in the block. The list types have only a
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* pointer to the first element in the list stored in the block.
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*/
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struct CDBValueStorage {
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nsCSSProperty property;
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nsCSSValue value;
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};
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struct CDBRectStorage {
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nsCSSProperty property;
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nsCSSRect value;
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};
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struct CDBValuePairStorage {
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nsCSSProperty property;
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nsCSSValuePair value;
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};
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struct CDBPointerStorage {
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nsCSSProperty property;
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void *value;
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};
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enum {
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CDBValueStorage_advance = sizeof(CDBValueStorage),
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CDBRectStorage_advance = sizeof(CDBRectStorage),
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CDBValuePairStorage_advance = sizeof(CDBValuePairStorage),
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// round up using the closest estimate we can get of the alignment
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// requirements of nsCSSValue:
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CDBPointerStorage_advance = PR_ROUNDUP(sizeof(CDBPointerStorage),
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sizeof(CDBValueStorage) - sizeof(nsCSSValue))
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};
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/*
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* Define a bunch of utility functions for getting the property or any
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* of the value types when the cursor is at the beginning of the storage
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* for the property-value pair. The versions taking a non-const cursor
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* argument return a reference so that the caller can assign into the
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* result.
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*/
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inline nsCSSProperty& PropertyAtCursor(char *aCursor) {
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return *reinterpret_cast<nsCSSProperty*>(aCursor);
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}
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inline nsCSSProperty PropertyAtCursor(const char *aCursor) {
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return *reinterpret_cast<const nsCSSProperty*>(aCursor);
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}
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inline nsCSSValue* ValueAtCursor(char *aCursor) {
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return & reinterpret_cast<CDBValueStorage*>(aCursor)->value;
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}
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inline const nsCSSValue* ValueAtCursor(const char *aCursor) {
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return & reinterpret_cast<const CDBValueStorage*>(aCursor)->value;
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}
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inline nsCSSRect* RectAtCursor(char *aCursor) {
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return & reinterpret_cast<CDBRectStorage*>(aCursor)->value;
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}
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inline const nsCSSRect* RectAtCursor(const char *aCursor) {
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return & reinterpret_cast<const CDBRectStorage*>(aCursor)->value;
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}
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inline nsCSSValuePair* ValuePairAtCursor(char *aCursor) {
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return & reinterpret_cast<CDBValuePairStorage*>(aCursor)->value;
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}
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inline const nsCSSValuePair* ValuePairAtCursor(const char *aCursor) {
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return & reinterpret_cast<const CDBValuePairStorage*>(aCursor)->value;
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}
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inline void*& PointerAtCursor(char *aCursor) {
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return reinterpret_cast<CDBPointerStorage*>(aCursor)->value;
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}
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inline void* PointerAtCursor(const char *aCursor) {
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return reinterpret_cast<const CDBPointerStorage*>(aCursor)->value;
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}
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inline nsCSSValueList*& ValueListAtCursor(char *aCursor) {
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return * reinterpret_cast<nsCSSValueList**>
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(& reinterpret_cast<CDBPointerStorage*>(aCursor)->value);
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}
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inline nsCSSValueList* ValueListAtCursor(const char *aCursor) {
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return static_cast<nsCSSValueList*>
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(reinterpret_cast<const CDBPointerStorage*>(aCursor)->value);
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}
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inline nsCSSValuePairList*& ValuePairListAtCursor(char *aCursor) {
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return * reinterpret_cast<nsCSSValuePairList**>
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(& reinterpret_cast<CDBPointerStorage*>(aCursor)->value);
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}
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inline nsCSSValuePairList* ValuePairListAtCursor(const char *aCursor) {
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return static_cast<nsCSSValuePairList*>
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(reinterpret_cast<const CDBPointerStorage*>(aCursor)->value);
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}
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static PRBool
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ShouldIgnoreColors(nsRuleData *aRuleData)
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{
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return aRuleData->mLevel != nsStyleSet::eAgentSheet &&
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aRuleData->mLevel != nsStyleSet::eUserSheet &&
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!aRuleData->mPresContext->UseDocumentColors();
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}
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/**
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* Tries to call |nsCSSValue::StartImageLoad()| on an image source.
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* Image sources are specified by |url()| or |-moz-image-rect()| function.
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*/
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static void
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TryToStartImageLoadOnValue(const nsCSSValue& aValue, nsIDocument* aDocument)
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{
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if (aValue.GetUnit() == eCSSUnit_URL) {
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aValue.StartImageLoad(aDocument);
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}
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else if (aValue.EqualsFunction(eCSSKeyword__moz_image_rect)) {
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nsCSSValue::Array* arguments = aValue.GetArrayValue();
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NS_ABORT_IF_FALSE(arguments->Count() == 6, "unexpected num of arguments");
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const nsCSSValue& image = arguments->Item(1);
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if (image.GetUnit() == eCSSUnit_URL)
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image.StartImageLoad(aDocument);
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}
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}
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static void
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TryToStartImageLoad(const nsCSSValue& aValue, nsIDocument* aDocument,
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nsCSSProperty aProperty)
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{
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if (nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_IMAGE_IS_IN_ARRAY_0)) {
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if (aValue.GetUnit() == eCSSUnit_Array) {
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TryToStartImageLoadOnValue(aValue.GetArrayValue()->Item(0), aDocument);
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}
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} else {
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TryToStartImageLoadOnValue(aValue, aDocument);
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}
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}
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static inline PRBool
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ShouldStartImageLoads(nsRuleData *aRuleData, nsCSSProperty aProperty)
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{
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// Don't initiate image loads for if-visited styles. This is
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// important because:
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// (1) it's a waste of CPU and bandwidth
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// (2) in some cases we'd start the image load on a style change
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// where we wouldn't have started the load initially, which makes
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// which links are visited detectable to Web pages (see bug
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// 557287)
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return !aRuleData->mStyleContext->IsStyleIfVisited() &&
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nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_START_IMAGE_LOADS);
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}
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void
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nsCSSCompressedDataBlock::MapRuleInfoInto(nsRuleData *aRuleData) const
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{
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// If we have no data for these structs, then return immediately.
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// This optimization should make us return most of the time, so we
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// have to worry much less (although still some) about the speed of
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// the rest of the function.
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if (!(aRuleData->mSIDs & mStyleBits))
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return;
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nsIDocument* doc = aRuleData->mPresContext->Document();
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const char* cursor = Block();
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const char* cursor_end = BlockEnd();
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while (cursor < cursor_end) {
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nsCSSProperty iProp = PropertyAtCursor(cursor);
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NS_ASSERTION(0 <= iProp && iProp < eCSSProperty_COUNT_no_shorthands,
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"out of range");
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if (nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]) &
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aRuleData->mSIDs) {
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void *prop =
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nsCSSExpandedDataBlock::RuleDataPropertyAt(aRuleData, iProp);
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switch (nsCSSProps::kTypeTable[iProp]) {
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case eCSSType_Value: {
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nsCSSValue* target = static_cast<nsCSSValue*>(prop);
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if (target->GetUnit() == eCSSUnit_Null) {
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const nsCSSValue *val = ValueAtCursor(cursor);
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NS_ASSERTION(val->GetUnit() != eCSSUnit_Null, "oops");
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if (ShouldStartImageLoads(aRuleData, iProp)) {
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TryToStartImageLoad(*val, doc, iProp);
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}
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*target = *val;
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if (iProp == eCSSProperty_font_family) {
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// XXX Are there other things like this?
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aRuleData->mFontData->mFamilyFromHTML = PR_FALSE;
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}
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if (nsCSSProps::PropHasFlags(iProp,
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CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED) &&
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ShouldIgnoreColors(aRuleData))
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{
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if (iProp == eCSSProperty_background_color) {
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// Force non-'transparent' background
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// colors to the user's default.
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if (target->IsNonTransparentColor()) {
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target->SetColorValue(aRuleData->
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mPresContext->
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DefaultBackgroundColor());
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}
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} else {
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// Ignore 'color', 'border-*-color', etc.
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*target = nsCSSValue();
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}
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}
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}
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cursor += CDBValueStorage_advance;
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} break;
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case eCSSType_Rect: {
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NS_ABORT_IF_FALSE(!nsCSSProps::PropHasFlags(iProp,
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CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED),
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"this case needs to handle color properties");
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const nsCSSRect* val = RectAtCursor(cursor);
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NS_ASSERTION(val->HasValue(), "oops");
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nsCSSRect* target = static_cast<nsCSSRect*>(prop);
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if (target->mTop.GetUnit() == eCSSUnit_Null)
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target->mTop = val->mTop;
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if (target->mRight.GetUnit() == eCSSUnit_Null)
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target->mRight = val->mRight;
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if (target->mBottom.GetUnit() == eCSSUnit_Null)
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target->mBottom = val->mBottom;
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if (target->mLeft.GetUnit() == eCSSUnit_Null)
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target->mLeft = val->mLeft;
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cursor += CDBRectStorage_advance;
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} break;
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case eCSSType_ValuePair: {
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NS_ABORT_IF_FALSE(!nsCSSProps::PropHasFlags(iProp,
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CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED),
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"this case needs to handle color properties");
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const nsCSSValuePair* val = ValuePairAtCursor(cursor);
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NS_ASSERTION(val->mXValue.GetUnit() != eCSSUnit_Null ||
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val->mYValue.GetUnit() != eCSSUnit_Null, "oops");
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nsCSSValuePair* target = static_cast<nsCSSValuePair*>(prop);
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NS_ASSERTION((target->mXValue.GetUnit() == eCSSUnit_Null)
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== (target->mYValue.GetUnit() == eCSSUnit_Null),
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"half a property?");
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if (target->mXValue.GetUnit() == eCSSUnit_Null) {
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target->mXValue = val->mXValue;
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target->mYValue = val->mYValue;
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}
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cursor += CDBValuePairStorage_advance;
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} break;
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case eCSSType_ValueList:
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case eCSSType_ValuePairList: {
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void** target = static_cast<void**>(prop);
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if (!*target) {
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if (ShouldStartImageLoads(aRuleData, iProp)) {
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for (nsCSSValueList* l = ValueListAtCursor(cursor);
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l; l = l->mNext) {
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TryToStartImageLoad(l->mValue, doc, iProp);
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}
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}
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void* val = PointerAtCursor(cursor);
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NS_ASSERTION(val, "oops");
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*target = val;
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if (nsCSSProps::PropHasFlags(iProp,
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CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED) &&
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ShouldIgnoreColors(aRuleData))
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{
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*target = nsnull;
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}
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}
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cursor += CDBPointerStorage_advance;
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} break;
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}
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} else {
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switch (nsCSSProps::kTypeTable[iProp]) {
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case eCSSType_Value: {
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cursor += CDBValueStorage_advance;
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} break;
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case eCSSType_Rect: {
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cursor += CDBRectStorage_advance;
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} break;
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case eCSSType_ValuePair: {
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cursor += CDBValuePairStorage_advance;
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} break;
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case eCSSType_ValueList:
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case eCSSType_ValuePairList: {
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cursor += CDBPointerStorage_advance;
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} break;
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}
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}
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}
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NS_ASSERTION(cursor == cursor_end, "inconsistent data");
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}
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const void*
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nsCSSCompressedDataBlock::StorageFor(nsCSSProperty aProperty) const
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{
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NS_PRECONDITION(!nsCSSProps::IsShorthand(aProperty),
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"Don't call for shorthands");
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// If we have no data for this struct, then return immediately.
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// This optimization should make us return most of the time, so we
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// have to worry much less (although still some) about the speed of
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// the rest of the function.
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if (!(nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[aProperty]) &
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mStyleBits))
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return nsnull;
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const char* cursor = Block();
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const char* cursor_end = BlockEnd();
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while (cursor < cursor_end) {
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nsCSSProperty iProp = PropertyAtCursor(cursor);
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NS_ASSERTION(0 <= iProp && iProp < eCSSProperty_COUNT_no_shorthands,
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"out of range");
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if (iProp == aProperty) {
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switch (nsCSSProps::kTypeTable[iProp]) {
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case eCSSType_Value: {
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return ValueAtCursor(cursor);
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}
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case eCSSType_Rect: {
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return RectAtCursor(cursor);
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}
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case eCSSType_ValuePair: {
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return ValuePairAtCursor(cursor);
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}
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case eCSSType_ValueList:
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case eCSSType_ValuePairList: {
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return &PointerAtCursor(const_cast<char*>(cursor));
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}
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}
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}
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switch (nsCSSProps::kTypeTable[iProp]) {
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case eCSSType_Value: {
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cursor += CDBValueStorage_advance;
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} break;
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case eCSSType_Rect: {
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cursor += CDBRectStorage_advance;
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} break;
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case eCSSType_ValuePair: {
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cursor += CDBValuePairStorage_advance;
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} break;
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case eCSSType_ValueList:
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case eCSSType_ValuePairList: {
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cursor += CDBPointerStorage_advance;
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} break;
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}
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}
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NS_ASSERTION(cursor == cursor_end, "inconsistent data");
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return nsnull;
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}
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already_AddRefed<nsCSSCompressedDataBlock>
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nsCSSCompressedDataBlock::Clone() const
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{
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const char *cursor = Block(), *cursor_end = BlockEnd();
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char *result_cursor;
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nsCSSCompressedDataBlock *result =
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new(cursor_end - cursor) nsCSSCompressedDataBlock();
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if (!result)
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return nsnull;
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result_cursor = result->Block();
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while (cursor < cursor_end) {
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nsCSSProperty iProp = PropertyAtCursor(cursor);
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NS_ASSERTION(0 <= iProp && iProp < eCSSProperty_COUNT_no_shorthands,
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"out of range");
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PropertyAtCursor(result_cursor) = iProp;
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switch (nsCSSProps::kTypeTable[iProp]) {
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case eCSSType_Value: {
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const nsCSSValue* val = ValueAtCursor(cursor);
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NS_ASSERTION(val->GetUnit() != eCSSUnit_Null, "oops");
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nsCSSValue *result_val = ValueAtCursor(result_cursor);
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new (result_val) nsCSSValue(*val);
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cursor += CDBValueStorage_advance;
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result_cursor += CDBValueStorage_advance;
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} break;
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case eCSSType_Rect: {
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const nsCSSRect* val = RectAtCursor(cursor);
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NS_ASSERTION(val->HasValue(), "oops");
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nsCSSRect* result_val = RectAtCursor(result_cursor);
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new (result_val) nsCSSRect(*val);
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cursor += CDBRectStorage_advance;
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result_cursor += CDBRectStorage_advance;
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} break;
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case eCSSType_ValuePair: {
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const nsCSSValuePair* val = ValuePairAtCursor(cursor);
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NS_ASSERTION(val->mXValue.GetUnit() != eCSSUnit_Null ||
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val->mYValue.GetUnit() != eCSSUnit_Null, "oops");
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nsCSSValuePair* result_val = ValuePairAtCursor(result_cursor);
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new (result_val) nsCSSValuePair(*val);
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cursor += CDBValuePairStorage_advance;
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result_cursor += CDBValuePairStorage_advance;
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} break;
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case eCSSType_ValueList:
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case eCSSType_ValuePairList: {
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void *copy;
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NS_ASSERTION(PointerAtCursor(cursor), "oops");
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switch (nsCSSProps::kTypeTable[iProp]) {
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default:
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NS_NOTREACHED("unreachable");
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// fall through to keep gcc's uninitialized
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// variable warning quiet
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case eCSSType_ValueList:
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copy = ValueListAtCursor(cursor)->Clone();
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break;
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case eCSSType_ValuePairList:
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copy = ValuePairListAtCursor(cursor)->Clone();
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break;
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}
|
|
if (!copy) {
|
|
result->mBlockEnd = result_cursor;
|
|
result->Destroy();
|
|
return nsnull;
|
|
}
|
|
PointerAtCursor(result_cursor) = copy;
|
|
cursor += CDBPointerStorage_advance;
|
|
result_cursor += CDBPointerStorage_advance;
|
|
} break;
|
|
}
|
|
}
|
|
NS_ASSERTION(cursor == cursor_end, "inconsistent data");
|
|
|
|
result->mBlockEnd = result_cursor;
|
|
result->mStyleBits = mStyleBits;
|
|
NS_ASSERTION(result->DataSize() == DataSize(), "wrong size");
|
|
|
|
result->AddRef();
|
|
return result;
|
|
}
|
|
|
|
void
|
|
nsCSSCompressedDataBlock::Destroy()
|
|
{
|
|
const char* cursor = Block();
|
|
const char* cursor_end = BlockEnd();
|
|
while (cursor < cursor_end) {
|
|
nsCSSProperty iProp = PropertyAtCursor(cursor);
|
|
NS_ASSERTION(0 <= iProp && iProp < eCSSProperty_COUNT_no_shorthands,
|
|
"out of range");
|
|
|
|
switch (nsCSSProps::kTypeTable[iProp]) {
|
|
case eCSSType_Value: {
|
|
const nsCSSValue* val = ValueAtCursor(cursor);
|
|
NS_ASSERTION(val->GetUnit() != eCSSUnit_Null, "oops");
|
|
val->~nsCSSValue();
|
|
cursor += CDBValueStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_Rect: {
|
|
const nsCSSRect* val = RectAtCursor(cursor);
|
|
NS_ASSERTION(val->HasValue(), "oops");
|
|
val->~nsCSSRect();
|
|
cursor += CDBRectStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValuePair: {
|
|
const nsCSSValuePair* val = ValuePairAtCursor(cursor);
|
|
NS_ASSERTION(val->mXValue.GetUnit() != eCSSUnit_Null ||
|
|
val->mYValue.GetUnit() != eCSSUnit_Null, "oops");
|
|
val->~nsCSSValuePair();
|
|
cursor += CDBValuePairStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValueList: {
|
|
nsCSSValueList* val = ValueListAtCursor(cursor);
|
|
NS_ASSERTION(val, "oops");
|
|
delete val;
|
|
cursor += CDBPointerStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValuePairList: {
|
|
nsCSSValuePairList* val = ValuePairListAtCursor(cursor);
|
|
NS_ASSERTION(val, "oops");
|
|
delete val;
|
|
cursor += CDBPointerStorage_advance;
|
|
} break;
|
|
}
|
|
}
|
|
NS_ASSERTION(cursor == cursor_end, "inconsistent data");
|
|
delete this;
|
|
}
|
|
|
|
/* static */ already_AddRefed<nsCSSCompressedDataBlock>
|
|
nsCSSCompressedDataBlock::CreateEmptyBlock()
|
|
{
|
|
nsCSSCompressedDataBlock *result = new(0) nsCSSCompressedDataBlock();
|
|
if (!result)
|
|
return nsnull;
|
|
result->mBlockEnd = result->Block();
|
|
|
|
result->AddRef();
|
|
return result;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
|
|
nsCSSExpandedDataBlock::nsCSSExpandedDataBlock()
|
|
{
|
|
AssertInitialState();
|
|
}
|
|
|
|
nsCSSExpandedDataBlock::~nsCSSExpandedDataBlock()
|
|
{
|
|
AssertInitialState();
|
|
}
|
|
|
|
const nsCSSExpandedDataBlock::PropertyOffsetInfo
|
|
nsCSSExpandedDataBlock::kOffsetTable[eCSSProperty_COUNT_no_shorthands] = {
|
|
#define CSS_PROP_BACKENDONLY(name_, id_, method_, flags_, datastruct_, \
|
|
member_, type_, kwtable_) \
|
|
{ offsetof(nsCSSExpandedDataBlock, m##datastruct_.member_), \
|
|
size_t(-1), \
|
|
size_t(-1) },
|
|
#define CSS_PROP(name_, id_, method_, flags_, datastruct_, member_, type_, \
|
|
kwtable_, stylestruct_, stylestructoffset_, animtype_) \
|
|
{ offsetof(nsCSSExpandedDataBlock, m##datastruct_.member_), \
|
|
offsetof(nsRuleData, m##datastruct_##Data), \
|
|
offsetof(nsRuleData##datastruct_, member_) },
|
|
#include "nsCSSPropList.h"
|
|
#undef CSS_PROP
|
|
#undef CSS_PROP_BACKENDONLY
|
|
};
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::DoExpand(nsRefPtr<nsCSSCompressedDataBlock> *aBlock,
|
|
PRBool aImportant)
|
|
{
|
|
NS_PRECONDITION(*aBlock, "unexpected null block");
|
|
|
|
if (!(*aBlock)->IsMutable()) {
|
|
// FIXME (maybe): We really don't need to clone the block
|
|
// itself, just all the data inside it.
|
|
*aBlock = (*aBlock)->Clone();
|
|
if (!*aBlock) {
|
|
// Not much we can do; just lose the properties.
|
|
NS_WARNING("out of memory");
|
|
return;
|
|
}
|
|
NS_ABORT_IF_FALSE((*aBlock)->IsMutable(), "we just cloned it");
|
|
}
|
|
|
|
/*
|
|
* Save needless copying and allocation by copying the memory
|
|
* corresponding to the stored data in the compressed block, and
|
|
* then, to avoid destructors, deleting the compressed block by
|
|
* calling |delete| instead of using its |Destroy| method.
|
|
*/
|
|
const char* cursor = (*aBlock)->Block();
|
|
const char* cursor_end = (*aBlock)->BlockEnd();
|
|
while (cursor < cursor_end) {
|
|
nsCSSProperty iProp = PropertyAtCursor(cursor);
|
|
NS_ASSERTION(0 <= iProp && iProp < eCSSProperty_COUNT_no_shorthands,
|
|
"out of range");
|
|
NS_ASSERTION(!HasPropertyBit(iProp),
|
|
"compressed block has property multiple times");
|
|
SetPropertyBit(iProp);
|
|
if (aImportant)
|
|
SetImportantBit(iProp);
|
|
void *prop = PropertyAt(iProp);
|
|
|
|
switch (nsCSSProps::kTypeTable[iProp]) {
|
|
case eCSSType_Value: {
|
|
const nsCSSValue* val = ValueAtCursor(cursor);
|
|
nsCSSValue* dest = static_cast<nsCSSValue*>(prop);
|
|
NS_ASSERTION(val->GetUnit() != eCSSUnit_Null, "oops");
|
|
NS_ASSERTION(dest->GetUnit() == eCSSUnit_Null,
|
|
"expanding into non-empty block");
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
dest->~nsCSSValue();
|
|
#endif
|
|
memcpy(dest, val, sizeof(nsCSSValue));
|
|
cursor += CDBValueStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_Rect: {
|
|
const nsCSSRect* val = RectAtCursor(cursor);
|
|
nsCSSRect* dest = static_cast<nsCSSRect*>(prop);
|
|
NS_ASSERTION(val->HasValue(), "oops");
|
|
NS_ASSERTION(!dest->HasValue(),
|
|
"expanding into non-empty block");
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
dest->~nsCSSRect();
|
|
#endif
|
|
memcpy(dest, val, sizeof(nsCSSRect));
|
|
cursor += CDBRectStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValuePair: {
|
|
const nsCSSValuePair* val = ValuePairAtCursor(cursor);
|
|
nsCSSValuePair* dest = static_cast<nsCSSValuePair*>(prop);
|
|
NS_ASSERTION(val->mXValue.GetUnit() != eCSSUnit_Null ||
|
|
val->mYValue.GetUnit() != eCSSUnit_Null, "oops");
|
|
NS_ASSERTION(dest->mXValue.GetUnit() == eCSSUnit_Null &&
|
|
dest->mYValue.GetUnit() == eCSSUnit_Null,
|
|
"expanding into non-empty block");
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
dest->~nsCSSValuePair();
|
|
#endif
|
|
memcpy(dest, val, sizeof(nsCSSValuePair));
|
|
cursor += CDBValuePairStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValueList:
|
|
case eCSSType_ValuePairList: {
|
|
void* val = PointerAtCursor(cursor);
|
|
void** dest = static_cast<void**>(prop);
|
|
NS_ASSERTION(val, "oops");
|
|
NS_ASSERTION(!*dest, "expanding into non-empty block");
|
|
*dest = val;
|
|
cursor += CDBPointerStorage_advance;
|
|
} break;
|
|
}
|
|
}
|
|
NS_ASSERTION(cursor == cursor_end, "inconsistent data");
|
|
|
|
NS_ASSERTION((*aBlock)->mRefCnt == 1, "unexpected reference count");
|
|
delete aBlock->forget().get();
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::Expand(
|
|
nsRefPtr<nsCSSCompressedDataBlock> *aNormalBlock,
|
|
nsRefPtr<nsCSSCompressedDataBlock> *aImportantBlock)
|
|
{
|
|
NS_PRECONDITION(*aNormalBlock, "unexpected null block");
|
|
AssertInitialState();
|
|
|
|
DoExpand(aNormalBlock, PR_FALSE);
|
|
if (*aImportantBlock) {
|
|
DoExpand(aImportantBlock, PR_TRUE);
|
|
}
|
|
}
|
|
|
|
nsCSSExpandedDataBlock::ComputeSizeResult
|
|
nsCSSExpandedDataBlock::ComputeSize()
|
|
{
|
|
ComputeSizeResult result = {0, 0};
|
|
for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; ++iHigh) {
|
|
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
|
|
continue;
|
|
for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; ++iLow) {
|
|
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
|
|
continue;
|
|
nsCSSProperty iProp = nsCSSPropertySet::CSSPropertyAt(iHigh, iLow);
|
|
NS_ASSERTION(0 <= iProp && iProp < eCSSProperty_COUNT_no_shorthands,
|
|
"out of range");
|
|
#ifdef DEBUG
|
|
void *prop = PropertyAt(iProp);
|
|
#endif
|
|
PRUint32 increment = 0;
|
|
switch (nsCSSProps::kTypeTable[iProp]) {
|
|
case eCSSType_Value: {
|
|
#ifdef DEBUG
|
|
nsCSSValue* val = static_cast<nsCSSValue*>(prop);
|
|
NS_ASSERTION(val->GetUnit() != eCSSUnit_Null,
|
|
"null value while computing size");
|
|
#endif
|
|
increment = CDBValueStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_Rect: {
|
|
#ifdef DEBUG
|
|
nsCSSRect* val = static_cast<nsCSSRect*>(prop);
|
|
NS_ASSERTION(val->HasValue(),
|
|
"Valueless rect while computing size");
|
|
#endif
|
|
increment = CDBRectStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValuePair: {
|
|
#ifdef DEBUG
|
|
nsCSSValuePair* val = static_cast<nsCSSValuePair*>(prop);
|
|
NS_ASSERTION(val->mXValue.GetUnit() != eCSSUnit_Null ||
|
|
val->mYValue.GetUnit() != eCSSUnit_Null,
|
|
"Valueless pair while computing size");
|
|
#endif
|
|
increment = CDBValuePairStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValueList:
|
|
case eCSSType_ValuePairList: {
|
|
#ifdef DEBUG
|
|
void* val = *static_cast<void**>(prop);
|
|
NS_ASSERTION(val, "Null pointer while computing size");
|
|
#endif
|
|
increment = CDBPointerStorage_advance;
|
|
} break;
|
|
}
|
|
if (mPropertiesImportant.HasPropertyAt(iHigh, iLow))
|
|
result.important += increment;
|
|
else
|
|
result.normal += increment;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::Compress(nsCSSCompressedDataBlock **aNormalBlock,
|
|
nsCSSCompressedDataBlock **aImportantBlock)
|
|
{
|
|
nsRefPtr<nsCSSCompressedDataBlock> result_normal, result_important;
|
|
char *cursor_normal, *cursor_important;
|
|
|
|
ComputeSizeResult size = ComputeSize();
|
|
|
|
result_normal = new(size.normal) nsCSSCompressedDataBlock();
|
|
if (!result_normal) {
|
|
*aNormalBlock = nsnull;
|
|
*aImportantBlock = nsnull;
|
|
return;
|
|
}
|
|
cursor_normal = result_normal->Block();
|
|
|
|
if (size.important != 0) {
|
|
result_important = new(size.important) nsCSSCompressedDataBlock();
|
|
if (!result_important) {
|
|
*aNormalBlock = nsnull;
|
|
*aImportantBlock = nsnull;
|
|
return;
|
|
}
|
|
cursor_important = result_important->Block();
|
|
} else {
|
|
result_important = nsnull;
|
|
}
|
|
|
|
/*
|
|
* Save needless copying and allocation by copying the memory
|
|
* corresponding to the stored data in the expanded block, and then
|
|
* clearing the data in the expanded block.
|
|
*/
|
|
for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; ++iHigh) {
|
|
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
|
|
continue;
|
|
for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; ++iLow) {
|
|
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
|
|
continue;
|
|
nsCSSProperty iProp = nsCSSPropertySet::CSSPropertyAt(iHigh, iLow);
|
|
NS_ASSERTION(0 <= iProp && iProp < eCSSProperty_COUNT_no_shorthands,
|
|
"out of range");
|
|
void *prop = PropertyAt(iProp);
|
|
PRBool important =
|
|
mPropertiesImportant.HasPropertyAt(iHigh, iLow);
|
|
char *&cursor = important ? cursor_important : cursor_normal;
|
|
nsCSSCompressedDataBlock *result =
|
|
important ? result_important : result_normal;
|
|
switch (nsCSSProps::kTypeTable[iProp]) {
|
|
case eCSSType_Value: {
|
|
nsCSSValue* val = static_cast<nsCSSValue*>(prop);
|
|
NS_ASSERTION(val->GetUnit() != eCSSUnit_Null,
|
|
"Null value while compressing");
|
|
CDBValueStorage *storage =
|
|
reinterpret_cast<CDBValueStorage*>(cursor);
|
|
storage->property = iProp;
|
|
memcpy(&storage->value, val, sizeof(nsCSSValue));
|
|
new (val) nsCSSValue();
|
|
cursor += CDBValueStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_Rect: {
|
|
nsCSSRect* val = static_cast<nsCSSRect*>(prop);
|
|
NS_ASSERTION(val->HasValue(),
|
|
"Valueless rect while compressing");
|
|
CDBRectStorage *storage =
|
|
reinterpret_cast<CDBRectStorage*>(cursor);
|
|
storage->property = iProp;
|
|
memcpy(&storage->value, val, sizeof(nsCSSRect));
|
|
new (val) nsCSSRect();
|
|
cursor += CDBRectStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValuePair: {
|
|
nsCSSValuePair* val = static_cast<nsCSSValuePair*>(prop);
|
|
NS_ASSERTION(val->mXValue.GetUnit() != eCSSUnit_Null ||
|
|
val->mYValue.GetUnit() != eCSSUnit_Null,
|
|
"Valueless pair while compressing");
|
|
CDBValuePairStorage *storage =
|
|
reinterpret_cast<CDBValuePairStorage*>(cursor);
|
|
storage->property = iProp;
|
|
memcpy(&storage->value, val, sizeof(nsCSSValuePair));
|
|
new (val) nsCSSValuePair();
|
|
cursor += CDBValuePairStorage_advance;
|
|
} break;
|
|
|
|
case eCSSType_ValueList:
|
|
case eCSSType_ValuePairList: {
|
|
void*& val = *static_cast<void**>(prop);
|
|
NS_ASSERTION(val, "Null pointer while compressing");
|
|
CDBPointerStorage *storage =
|
|
reinterpret_cast<CDBPointerStorage*>(cursor);
|
|
storage->property = iProp;
|
|
storage->value = val;
|
|
val = nsnull;
|
|
cursor += CDBPointerStorage_advance;
|
|
} break;
|
|
}
|
|
result->mStyleBits |=
|
|
nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]);
|
|
}
|
|
}
|
|
|
|
result_normal->mBlockEnd = cursor_normal;
|
|
NS_ASSERTION(result_normal->DataSize() == ptrdiff_t(size.normal),
|
|
"size miscalculation");
|
|
if (result_important) {
|
|
result_important->mBlockEnd = cursor_important;
|
|
NS_ASSERTION(result_important->DataSize() == ptrdiff_t(size.important),
|
|
"size miscalculation");
|
|
}
|
|
|
|
ClearSets();
|
|
AssertInitialState();
|
|
result_normal.forget(aNormalBlock);
|
|
result_important.forget(aImportantBlock);
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::Clear()
|
|
{
|
|
for (size_t iHigh = 0; iHigh < nsCSSPropertySet::kChunkCount; ++iHigh) {
|
|
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
|
|
continue;
|
|
for (size_t iLow = 0; iLow < nsCSSPropertySet::kBitsInChunk; ++iLow) {
|
|
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
|
|
continue;
|
|
nsCSSProperty iProp = nsCSSPropertySet::CSSPropertyAt(iHigh, iLow);
|
|
ClearProperty(iProp);
|
|
}
|
|
}
|
|
|
|
AssertInitialState();
|
|
}
|
|
|
|
void
|
|
nsCSSExpandedDataBlock::ClearProperty(nsCSSProperty aPropID)
|
|
{
|
|
NS_ASSERTION(0 <= aPropID && aPropID < eCSSProperty_COUNT_no_shorthands,
|
|
"out of range");
|
|
|
|
ClearPropertyBit(aPropID);
|
|
ClearImportantBit(aPropID);
|
|
|
|
void *prop = PropertyAt(aPropID);
|
|
switch (nsCSSProps::kTypeTable[aPropID]) {
|
|
case eCSSType_Value: {
|
|
nsCSSValue* val = static_cast<nsCSSValue*>(prop);
|
|
val->Reset();
|
|
} break;
|
|
|
|
case eCSSType_Rect: {
|
|
nsCSSRect* val = static_cast<nsCSSRect*>(prop);
|
|
val->Reset();
|
|
} break;
|
|
|
|
case eCSSType_ValuePair: {
|
|
nsCSSValuePair* val = static_cast<nsCSSValuePair*>(prop);
|
|
val->mXValue.Reset();
|
|
val->mYValue.Reset();
|
|
} break;
|
|
|
|
case eCSSType_ValueList: {
|
|
nsCSSValueList*& val = *static_cast<nsCSSValueList**>(prop);
|
|
if (val) {
|
|
delete val;
|
|
val = nsnull;
|
|
}
|
|
} break;
|
|
|
|
case eCSSType_ValuePairList: {
|
|
nsCSSValuePairList*& val =
|
|
*static_cast<nsCSSValuePairList**>(prop);
|
|
if (val) {
|
|
delete val;
|
|
val = nsnull;
|
|
}
|
|
} break;
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsCSSExpandedDataBlock::DoAssertInitialState()
|
|
{
|
|
mPropertiesSet.AssertIsEmpty("not initial state");
|
|
mPropertiesImportant.AssertIsEmpty("not initial state");
|
|
|
|
for (PRUint32 i = 0; i < eCSSProperty_COUNT_no_shorthands; ++i) {
|
|
void *prop = PropertyAt(nsCSSProperty(i));
|
|
switch (nsCSSProps::kTypeTable[i]) {
|
|
case eCSSType_Value: {
|
|
nsCSSValue* val = static_cast<nsCSSValue*>(prop);
|
|
NS_ASSERTION(val->GetUnit() == eCSSUnit_Null,
|
|
"not initial state");
|
|
} break;
|
|
|
|
case eCSSType_Rect: {
|
|
nsCSSRect* val = static_cast<nsCSSRect*>(prop);
|
|
NS_ASSERTION(val->mTop.GetUnit() == eCSSUnit_Null,
|
|
"not initial state");
|
|
NS_ASSERTION(val->mRight.GetUnit() == eCSSUnit_Null,
|
|
"not initial state");
|
|
NS_ASSERTION(val->mBottom.GetUnit() == eCSSUnit_Null,
|
|
"not initial state");
|
|
NS_ASSERTION(val->mLeft.GetUnit() == eCSSUnit_Null,
|
|
"not initial state");
|
|
} break;
|
|
|
|
case eCSSType_ValuePair: {
|
|
nsCSSValuePair* val = static_cast<nsCSSValuePair*>(prop);
|
|
NS_ASSERTION(val->mXValue.GetUnit() == eCSSUnit_Null,
|
|
"not initial state");
|
|
NS_ASSERTION(val->mYValue.GetUnit() == eCSSUnit_Null,
|
|
"not initial state");
|
|
} break;
|
|
|
|
case eCSSType_ValueList: {
|
|
nsCSSValueList* val = *static_cast<nsCSSValueList**>(prop);
|
|
NS_ASSERTION(val == nsnull, "not initial state");
|
|
} break;
|
|
|
|
case eCSSType_ValuePairList: {
|
|
nsCSSValuePairList* val =
|
|
*static_cast<nsCSSValuePairList**>(prop);
|
|
NS_ASSERTION(val == nsnull, "not initial state");
|
|
} break;
|
|
}
|
|
}
|
|
}
|
|
#endif
|