зеркало из https://github.com/mozilla/pjs.git
918 строки
29 KiB
C++
918 строки
29 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Daniel Glazman <glazman@netscape.com>
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* Brian Ryner <bryner@brianryner.com>
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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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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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* the container for the style sheets that apply to a presentation, and
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* the internal API that the style system exposes for creating (and
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* potentially re-creating) style contexts
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*/
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#include "nsStyleSet.h"
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#include "nsNetUtil.h"
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#include "nsICSSStyleSheet.h"
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#include "nsIDocument.h"
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#include "nsRuleWalker.h"
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#include "nsStyleContext.h"
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#include "nsICSSStyleRule.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsCSSPseudoElements.h"
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#include "nsCSSRuleProcessor.h"
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#include "nsIContent.h"
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#include "nsIFrame.h"
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nsIURI *nsStyleSet::gQuirkURI = 0;
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nsStyleSet::nsStyleSet()
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: mRuleTree(nsnull),
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mRuleWalker(nsnull),
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mDestroyedCount(0),
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mBatching(0),
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mInShutdown(PR_FALSE),
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mAuthorStyleDisabled(PR_FALSE),
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mDirty(0)
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{
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}
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nsresult
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nsStyleSet::Init(nsPresContext *aPresContext)
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{
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if (!gQuirkURI) {
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static const char kQuirk_href[] = "resource://gre/res/quirk.css";
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NS_NewURI(&gQuirkURI, kQuirk_href);
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NS_ENSURE_TRUE(gQuirkURI, NS_ERROR_OUT_OF_MEMORY);
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}
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if (!BuildDefaultStyleData(aPresContext)) {
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mDefaultStyleData.Destroy(0, aPresContext);
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return NS_ERROR_OUT_OF_MEMORY;
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}
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mRuleTree = nsRuleNode::CreateRootNode(aPresContext);
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if (!mRuleTree) {
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mDefaultStyleData.Destroy(0, aPresContext);
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return NS_ERROR_OUT_OF_MEMORY;
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}
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mRuleWalker = new nsRuleWalker(mRuleTree);
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if (!mRuleWalker) {
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mRuleTree->Destroy();
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mDefaultStyleData.Destroy(0, aPresContext);
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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nsresult
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nsStyleSet::GatherRuleProcessors(sheetType aType)
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{
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mRuleProcessors[aType] = nsnull;
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if (mAuthorStyleDisabled && (aType == eDocSheet ||
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aType == ePresHintSheet ||
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aType == eHTMLPresHintSheet ||
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aType == eStyleAttrSheet)) {
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//don't regather if this level is disabled
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return NS_OK;
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}
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if (mSheets[aType].Count()) {
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switch (aType) {
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case eAgentSheet:
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case eUserSheet:
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case eDocSheet:
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case eOverrideSheet: {
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// levels containing CSS stylesheets
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nsCOMArray<nsIStyleSheet>& sheets = mSheets[aType];
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nsCOMArray<nsICSSStyleSheet> cssSheets(sheets.Count());
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for (PRInt32 i = 0, i_end = sheets.Count(); i < i_end; ++i) {
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nsCOMPtr<nsICSSStyleSheet> cssSheet = do_QueryInterface(sheets[i]);
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NS_ASSERTION(cssSheet, "not a CSS sheet");
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cssSheets.AppendObject(cssSheet);
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}
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mRuleProcessors[aType] = new nsCSSRuleProcessor(cssSheets);
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} break;
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default:
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// levels containing non-CSS stylesheets
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NS_ASSERTION(mSheets[aType].Count() == 1, "only one sheet per level");
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mRuleProcessors[aType] = do_QueryInterface(mSheets[aType][0]);
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break;
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}
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}
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return NS_OK;
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}
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#ifdef DEBUG
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#define CHECK_APPLICABLE \
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PR_BEGIN_MACRO \
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PRBool applicable = PR_TRUE; \
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aSheet->GetApplicable(applicable); \
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NS_ASSERTION(applicable, "Inapplicable sheet being placed in style set"); \
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PR_END_MACRO
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#else
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#define CHECK_APPLICABLE
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#endif
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nsresult
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nsStyleSet::AppendStyleSheet(sheetType aType, nsIStyleSheet *aSheet)
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{
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NS_PRECONDITION(aSheet, "null arg");
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CHECK_APPLICABLE;
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mSheets[aType].RemoveObject(aSheet);
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if (!mSheets[aType].AppendObject(aSheet))
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return NS_ERROR_OUT_OF_MEMORY;
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if (!mBatching)
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return GatherRuleProcessors(aType);
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mDirty |= 1 << aType;
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return NS_OK;
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}
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nsresult
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nsStyleSet::PrependStyleSheet(sheetType aType, nsIStyleSheet *aSheet)
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{
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NS_PRECONDITION(aSheet, "null arg");
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CHECK_APPLICABLE;
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mSheets[aType].RemoveObject(aSheet);
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if (!mSheets[aType].InsertObjectAt(aSheet, 0))
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return NS_ERROR_OUT_OF_MEMORY;
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if (!mBatching)
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return GatherRuleProcessors(aType);
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mDirty |= 1 << aType;
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return NS_OK;
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}
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nsresult
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nsStyleSet::RemoveStyleSheet(sheetType aType, nsIStyleSheet *aSheet)
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{
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NS_PRECONDITION(aSheet, "null arg");
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#ifdef DEBUG
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PRBool complete = PR_TRUE;
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aSheet->GetComplete(complete);
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NS_ASSERTION(complete, "Incomplete sheet being removed from style set");
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#endif
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mSheets[aType].RemoveObject(aSheet);
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if (!mBatching)
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return GatherRuleProcessors(aType);
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mDirty |= 1 << aType;
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return NS_OK;
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}
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nsresult
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nsStyleSet::ReplaceSheets(sheetType aType,
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const nsCOMArray<nsIStyleSheet> &aNewSheets)
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{
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mSheets[aType].Clear();
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if (!mSheets[aType].AppendObjects(aNewSheets))
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return NS_ERROR_OUT_OF_MEMORY;
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if (!mBatching)
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return GatherRuleProcessors(aType);
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mDirty |= 1 << aType;
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return NS_OK;
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}
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PRBool
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nsStyleSet::GetAuthorStyleDisabled()
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{
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return mAuthorStyleDisabled;
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}
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nsresult
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nsStyleSet::SetAuthorStyleDisabled(PRBool aStyleDisabled)
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{
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if (aStyleDisabled == !mAuthorStyleDisabled) {
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mAuthorStyleDisabled = aStyleDisabled;
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BeginUpdate();
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mDirty |= 1 << eDocSheet |
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1 << ePresHintSheet |
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1 << eHTMLPresHintSheet |
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1 << eStyleAttrSheet;
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return EndUpdate();
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}
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return NS_OK;
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}
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// -------- Doc Sheets
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nsresult
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nsStyleSet::AddDocStyleSheet(nsIStyleSheet* aSheet, nsIDocument* aDocument)
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{
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NS_PRECONDITION(aSheet && aDocument, "null arg");
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CHECK_APPLICABLE;
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nsCOMArray<nsIStyleSheet>& docSheets = mSheets[eDocSheet];
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docSheets.RemoveObject(aSheet);
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// lowest index first
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PRInt32 newDocIndex = aDocument->GetIndexOfStyleSheet(aSheet);
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PRInt32 count = docSheets.Count();
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PRInt32 index;
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for (index = 0; index < count; index++) {
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nsIStyleSheet* sheet = docSheets.ObjectAt(index);
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PRInt32 sheetDocIndex = aDocument->GetIndexOfStyleSheet(sheet);
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if (sheetDocIndex > newDocIndex)
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break;
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}
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if (!docSheets.InsertObjectAt(aSheet, index))
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return NS_ERROR_OUT_OF_MEMORY;
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if (!mBatching)
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return GatherRuleProcessors(eDocSheet);
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mDirty |= 1 << eDocSheet;
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return NS_OK;
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}
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#undef CHECK_APPLICABLE
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// Batching
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void
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nsStyleSet::BeginUpdate()
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{
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++mBatching;
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}
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nsresult
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nsStyleSet::EndUpdate()
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{
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NS_ASSERTION(mBatching > 0, "Unbalanced EndUpdate");
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if (--mBatching) {
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// We're not completely done yet.
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return NS_OK;
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}
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for (int i = 0; i < eSheetTypeCount; ++i) {
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if (mDirty & (1 << i)) {
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nsresult rv = GatherRuleProcessors(sheetType(i));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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}
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mDirty = 0;
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return NS_OK;
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}
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void
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nsStyleSet::EnableQuirkStyleSheet(PRBool aEnable)
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{
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if (!mQuirkStyleSheet) {
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// first find the quirk sheet:
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// - run through all of the agent sheets and check for a CSSStyleSheet that
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// has the URL we want
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PRInt32 nSheets = mSheets[eAgentSheet].Count();
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for (PRInt32 i = 0; i < nSheets; ++i) {
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nsIStyleSheet *sheet = mSheets[eAgentSheet].ObjectAt(i);
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NS_ASSERTION(sheet, "mAgentSheets should not contain null sheets");
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nsICSSStyleSheet *cssSheet = NS_STATIC_CAST(nsICSSStyleSheet*, sheet);
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NS_ASSERTION(nsCOMPtr<nsICSSStyleSheet>(do_QueryInterface(sheet)) == cssSheet,
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"Agent sheet must be a CSSStyleSheet");
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nsCOMPtr<nsIStyleSheet> quirkSheet;
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PRBool bHasSheet = PR_FALSE;
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if (NS_SUCCEEDED(cssSheet->ContainsStyleSheet(gQuirkURI, bHasSheet,
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getter_AddRefs(quirkSheet)))
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&& bHasSheet) {
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NS_ASSERTION(quirkSheet, "QuirkSheet must be set: ContainsStyleSheet is hosed");
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// cache the sheet for faster lookup next time
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mQuirkStyleSheet = quirkSheet;
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// only one quirk style sheet can exist, so stop looking
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break;
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}
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}
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}
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NS_ASSERTION(mQuirkStyleSheet, "no quirk stylesheet");
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if (mQuirkStyleSheet) {
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#ifdef DEBUG_dbaron_off // XXX Make this |DEBUG| once it stops firing.
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PRBool applicableNow;
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mQuirkStyleSheet->GetApplicable(applicableNow);
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NS_ASSERTION(!mRuleProcessors[eAgentSheet] || aEnable == applicableNow,
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"enabling/disabling quirk stylesheet too late or incomplete quirk stylesheet");
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if (mRuleProcessors[eAgentSheet] && aEnable == applicableNow)
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printf("WARNING: We set the quirks mode too many times.\n"); // we do!
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#endif
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mQuirkStyleSheet->SetEnabled(aEnable);
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}
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}
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static PRBool
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EnumRulesMatching(nsIStyleRuleProcessor* aProcessor, void* aData)
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{
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ElementRuleProcessorData* data =
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NS_STATIC_CAST(ElementRuleProcessorData*, aData);
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aProcessor->RulesMatching(data);
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return PR_TRUE;
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}
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/**
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* |GetContext| implements sharing of style contexts (not just the data
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* on the rule nodes) between siblings and cousins of the same
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* generation. (It works for cousins of the same generation since
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* |aParentContext| could itself be a shared context.)
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*/
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already_AddRefed<nsStyleContext>
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nsStyleSet::GetContext(nsPresContext* aPresContext,
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nsStyleContext* aParentContext,
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nsIAtom* aPseudoTag)
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{
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nsStyleContext* result = nsnull;
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nsRuleNode* ruleNode = mRuleWalker->GetCurrentNode();
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if (aParentContext)
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result = aParentContext->FindChildWithRules(aPseudoTag, ruleNode).get();
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#ifdef NOISY_DEBUG
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if (result)
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fprintf(stdout, "--- SharedSC %d ---\n", ++gSharedCount);
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else
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fprintf(stdout, "+++ NewSC %d +++\n", ++gNewCount);
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#endif
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if (!result) {
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result = NS_NewStyleContext(aParentContext, aPseudoTag, ruleNode,
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aPresContext).get();
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if (!aParentContext && result)
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mRoots.AppendElement(result);
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}
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return result;
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}
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void
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nsStyleSet::AddImportantRules(nsRuleNode* aCurrLevelNode,
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nsRuleNode* aLastPrevLevelNode)
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{
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if (!aCurrLevelNode || aCurrLevelNode == aLastPrevLevelNode)
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return;
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AddImportantRules(aCurrLevelNode->GetParent(), aLastPrevLevelNode);
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nsIStyleRule *rule = aCurrLevelNode->GetRule();
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nsCOMPtr<nsICSSStyleRule> cssRule(do_QueryInterface(rule));
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if (cssRule) {
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nsCOMPtr<nsIStyleRule> impRule = cssRule->GetImportantRule();
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if (impRule)
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mRuleWalker->Forward(impRule);
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}
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}
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#ifdef DEBUG
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void
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nsStyleSet::AssertNoImportantRules(nsRuleNode* aCurrLevelNode,
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nsRuleNode* aLastPrevLevelNode)
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{
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if (!aCurrLevelNode || aCurrLevelNode == aLastPrevLevelNode)
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return;
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AssertNoImportantRules(aCurrLevelNode->GetParent(), aLastPrevLevelNode);
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nsIStyleRule *rule = aCurrLevelNode->GetRule();
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nsCOMPtr<nsICSSStyleRule> cssRule(do_QueryInterface(rule));
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if (cssRule) {
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nsCOMPtr<nsIStyleRule> impRule = cssRule->GetImportantRule();
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NS_ASSERTION(!impRule, "Unexpected important rule");
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}
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}
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void
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nsStyleSet::AssertNoCSSRules(nsRuleNode* aCurrLevelNode,
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nsRuleNode* aLastPrevLevelNode)
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{
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if (!aCurrLevelNode || aCurrLevelNode == aLastPrevLevelNode)
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return;
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AssertNoImportantRules(aCurrLevelNode->GetParent(), aLastPrevLevelNode);
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nsIStyleRule *rule = aCurrLevelNode->GetRule();
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nsCOMPtr<nsICSSStyleRule> cssRule(do_QueryInterface(rule));
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NS_ASSERTION(!cssRule, "Unexpected CSS rule");
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}
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#endif
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// Enumerate the rules in a way that cares about the order of the rules.
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void
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nsStyleSet::FileRules(nsIStyleRuleProcessor::EnumFunc aCollectorFunc,
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RuleProcessorData* aData)
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{
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// Cascading order:
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// [least important]
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// 1. UA normal rules = Agent normal
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// 2. Presentation hints = PresHint normal
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// 3. User normal rules = User normal
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// 4. HTML Presentation hints = HTMLPresHint normal
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// 5. Author normal rules = Document normal
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// 6. Override normal rules = Override normal
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// 7. Author !important rules = Document !important
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// 8. Override !important rules = Override !important
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// 9. User !important rules = User !important
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// 10. UA !important rules = Agent !important
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// [most important]
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NS_PRECONDITION(SheetCount(ePresHintSheet) == 0 ||
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SheetCount(eHTMLPresHintSheet) == 0,
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"Can't have both types of preshint sheets at once!");
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if (mRuleProcessors[eAgentSheet])
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(*aCollectorFunc)(mRuleProcessors[eAgentSheet], aData);
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nsRuleNode* lastAgentRN = mRuleWalker->GetCurrentNode();
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if (mRuleProcessors[ePresHintSheet])
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(*aCollectorFunc)(mRuleProcessors[ePresHintSheet], aData);
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nsRuleNode* lastPresHintRN = mRuleWalker->GetCurrentNode();
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if (mRuleProcessors[eUserSheet])
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(*aCollectorFunc)(mRuleProcessors[eUserSheet], aData);
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nsRuleNode* lastUserRN = mRuleWalker->GetCurrentNode();
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if (mRuleProcessors[eHTMLPresHintSheet])
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(*aCollectorFunc)(mRuleProcessors[eHTMLPresHintSheet], aData);
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nsRuleNode* lastHTMLPresHintRN = mRuleWalker->GetCurrentNode();
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PRBool cutOffInheritance = PR_FALSE;
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if (mStyleRuleSupplier) {
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// We can supply additional document-level sheets that should be walked.
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mStyleRuleSupplier->WalkRules(this, aCollectorFunc, aData,
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&cutOffInheritance);
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}
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if (!cutOffInheritance && mRuleProcessors[eDocSheet]) // NOTE: different
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(*aCollectorFunc)(mRuleProcessors[eDocSheet], aData);
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if (mRuleProcessors[eStyleAttrSheet])
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(*aCollectorFunc)(mRuleProcessors[eStyleAttrSheet], aData);
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if (mRuleProcessors[eOverrideSheet])
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(*aCollectorFunc)(mRuleProcessors[eOverrideSheet], aData);
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nsRuleNode* lastOvrRN = mRuleWalker->GetCurrentNode();
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// There should be no important rules in the preshint or HTMLpreshint level
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AddImportantRules(lastOvrRN, lastHTMLPresHintRN); // doc and override
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#ifdef DEBUG
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AssertNoCSSRules(lastHTMLPresHintRN, lastUserRN);
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AssertNoImportantRules(lastHTMLPresHintRN, lastUserRN); // HTML preshints
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#endif
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AddImportantRules(lastUserRN, lastPresHintRN); //user
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#ifdef DEBUG
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AssertNoImportantRules(lastPresHintRN, lastAgentRN); // preshints
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#endif
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AddImportantRules(lastAgentRN, nsnull); //agent
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}
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// Enumerate all the rules in a way that doesn't care about the order
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// of the rules and doesn't walk !important-rules.
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|
void
|
|
nsStyleSet::WalkRuleProcessors(nsIStyleRuleProcessor::EnumFunc aFunc,
|
|
RuleProcessorData* aData)
|
|
{
|
|
NS_PRECONDITION(SheetCount(ePresHintSheet) == 0 ||
|
|
SheetCount(eHTMLPresHintSheet) == 0,
|
|
"Can't have both types of preshint sheets at once!");
|
|
|
|
if (mRuleProcessors[eAgentSheet])
|
|
(*aFunc)(mRuleProcessors[eAgentSheet], aData);
|
|
if (mRuleProcessors[ePresHintSheet])
|
|
(*aFunc)(mRuleProcessors[ePresHintSheet], aData);
|
|
if (mRuleProcessors[eUserSheet])
|
|
(*aFunc)(mRuleProcessors[eUserSheet], aData);
|
|
if (mRuleProcessors[eHTMLPresHintSheet])
|
|
(*aFunc)(mRuleProcessors[eHTMLPresHintSheet], aData);
|
|
|
|
PRBool cutOffInheritance = PR_FALSE;
|
|
if (mStyleRuleSupplier) {
|
|
// We can supply additional document-level sheets that should be walked.
|
|
mStyleRuleSupplier->WalkRules(this, aFunc, aData, &cutOffInheritance);
|
|
}
|
|
if (!cutOffInheritance && mRuleProcessors[eDocSheet]) // NOTE: different
|
|
(*aFunc)(mRuleProcessors[eDocSheet], aData);
|
|
if (mRuleProcessors[eStyleAttrSheet])
|
|
(*aFunc)(mRuleProcessors[eStyleAttrSheet], aData);
|
|
if (mRuleProcessors[eOverrideSheet])
|
|
(*aFunc)(mRuleProcessors[eOverrideSheet], aData);
|
|
}
|
|
|
|
PRBool nsStyleSet::BuildDefaultStyleData(nsPresContext* aPresContext)
|
|
{
|
|
NS_ASSERTION(!mDefaultStyleData.mResetData &&
|
|
!mDefaultStyleData.mInheritedData,
|
|
"leaking default style data");
|
|
mDefaultStyleData.mResetData = new (aPresContext) nsResetStyleData;
|
|
if (!mDefaultStyleData.mResetData)
|
|
return PR_FALSE;
|
|
mDefaultStyleData.mInheritedData = new (aPresContext) nsInheritedStyleData;
|
|
if (!mDefaultStyleData.mInheritedData)
|
|
return PR_FALSE;
|
|
|
|
#define SSARG_PRESCONTEXT aPresContext
|
|
|
|
#define CREATE_DATA(name, type, args) \
|
|
if (!(mDefaultStyleData.m##type##Data->m##name##Data = \
|
|
new (aPresContext) nsStyle##name args)) \
|
|
return PR_FALSE;
|
|
|
|
#define STYLE_STRUCT_INHERITED(name, checkdata_cb, ctor_args) \
|
|
CREATE_DATA(name, Inherited, ctor_args)
|
|
#define STYLE_STRUCT_RESET(name, checkdata_cb, ctor_args) \
|
|
CREATE_DATA(name, Reset, ctor_args)
|
|
|
|
#include "nsStyleStructList.h"
|
|
|
|
#undef STYLE_STRUCT_INHERITED
|
|
#undef STYLE_STRUCT_RESET
|
|
#undef SSARG_PRESCONTEXT
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleFor(nsIContent* aContent,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nsnull);
|
|
|
|
nsStyleContext* result = nsnull;
|
|
nsPresContext* presContext = PresContext();
|
|
|
|
NS_ASSERTION(aContent, "must have content");
|
|
NS_ASSERTION(aContent->IsContentOfType(nsIContent::eELEMENT),
|
|
"content must be element");
|
|
|
|
if (aContent && presContext) {
|
|
if (mRuleProcessors[eAgentSheet] ||
|
|
mRuleProcessors[ePresHintSheet] ||
|
|
mRuleProcessors[eUserSheet] ||
|
|
mRuleProcessors[eHTMLPresHintSheet] ||
|
|
mRuleProcessors[eDocSheet] ||
|
|
mRuleProcessors[eStyleAttrSheet] ||
|
|
mRuleProcessors[eOverrideSheet]) {
|
|
ElementRuleProcessorData data(presContext, aContent, mRuleWalker);
|
|
FileRules(EnumRulesMatching, &data);
|
|
result = GetContext(presContext, aParentContext, nsnull).get();
|
|
|
|
// Now reset the walker back to the root of the tree.
|
|
mRuleWalker->Reset();
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolveStyleForNonElement(nsStyleContext* aParentContext)
|
|
{
|
|
nsStyleContext* result = nsnull;
|
|
nsPresContext *presContext = PresContext();
|
|
|
|
if (presContext) {
|
|
if (mRuleProcessors[eAgentSheet] ||
|
|
mRuleProcessors[ePresHintSheet] ||
|
|
mRuleProcessors[eUserSheet] ||
|
|
mRuleProcessors[eHTMLPresHintSheet] ||
|
|
mRuleProcessors[eDocSheet] ||
|
|
mRuleProcessors[eStyleAttrSheet] ||
|
|
mRuleProcessors[eOverrideSheet]) {
|
|
result = GetContext(presContext, aParentContext,
|
|
nsCSSAnonBoxes::mozNonElement).get();
|
|
NS_ASSERTION(mRuleWalker->AtRoot(), "rule walker must be at root");
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static PRBool
|
|
EnumPseudoRulesMatching(nsIStyleRuleProcessor* aProcessor, void* aData)
|
|
{
|
|
PseudoRuleProcessorData* data =
|
|
NS_STATIC_CAST(PseudoRuleProcessorData*, aData);
|
|
|
|
aProcessor->RulesMatching(data);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ResolvePseudoStyleFor(nsIContent* aParentContent,
|
|
nsIAtom* aPseudoTag,
|
|
nsStyleContext* aParentContext,
|
|
nsICSSPseudoComparator* aComparator)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nsnull);
|
|
|
|
nsStyleContext* result = nsnull;
|
|
nsPresContext *presContext = PresContext();
|
|
|
|
NS_ASSERTION(aPseudoTag, "must have pseudo tag");
|
|
NS_ASSERTION(!aParentContent ||
|
|
aParentContent->IsContentOfType(nsIContent::eELEMENT),
|
|
"content (if non-null) must be element");
|
|
NS_ASSERTION(aParentContent ||
|
|
nsCSSAnonBoxes::IsAnonBox(aPseudoTag),
|
|
"null content must correspond to anonymous box");
|
|
NS_ASSERTION(nsCSSAnonBoxes::IsAnonBox(aPseudoTag) ||
|
|
nsCSSPseudoElements::IsPseudoElement(aPseudoTag),
|
|
"aPseudoTag must be pseudo-element or anonymous box");
|
|
|
|
if (aPseudoTag && presContext) {
|
|
if (mRuleProcessors[eAgentSheet] ||
|
|
mRuleProcessors[ePresHintSheet] ||
|
|
mRuleProcessors[eUserSheet] ||
|
|
mRuleProcessors[eHTMLPresHintSheet] ||
|
|
mRuleProcessors[eDocSheet] ||
|
|
mRuleProcessors[eStyleAttrSheet] ||
|
|
mRuleProcessors[eOverrideSheet]) {
|
|
PseudoRuleProcessorData data(presContext, aParentContent, aPseudoTag,
|
|
aComparator, mRuleWalker);
|
|
FileRules(EnumPseudoRulesMatching, &data);
|
|
|
|
result = GetContext(presContext, aParentContext, aPseudoTag).get();
|
|
|
|
// Now reset the walker back to the root of the tree.
|
|
mRuleWalker->Reset();
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ProbePseudoStyleFor(nsIContent* aParentContent,
|
|
nsIAtom* aPseudoTag,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
NS_ENSURE_FALSE(mInShutdown, nsnull);
|
|
|
|
nsStyleContext* result = nsnull;
|
|
nsPresContext *presContext = PresContext();
|
|
|
|
NS_ASSERTION(aPseudoTag, "must have pseudo tag");
|
|
NS_ASSERTION(aParentContent &&
|
|
aParentContent->IsContentOfType(nsIContent::eELEMENT),
|
|
"aParentContent must be element");
|
|
//NS_ASSERTION(nsCSSPseudoElements::IsPseudoElement(aPseudoTag),
|
|
// "aPseudoTag must be a pseudo-element");
|
|
NS_ASSERTION(aParentContent ||
|
|
nsCSSAnonBoxes::IsAnonBox(aPseudoTag),
|
|
"null content must correspond to anonymous box");
|
|
NS_ASSERTION(nsCSSAnonBoxes::IsAnonBox(aPseudoTag) ||
|
|
nsCSSPseudoElements::IsPseudoElement(aPseudoTag),
|
|
"aPseudoTag must be pseudo-element or anonymous box");
|
|
|
|
if (aPseudoTag && presContext) {
|
|
if (mRuleProcessors[eAgentSheet] ||
|
|
mRuleProcessors[ePresHintSheet] ||
|
|
mRuleProcessors[eUserSheet] ||
|
|
mRuleProcessors[eHTMLPresHintSheet] ||
|
|
mRuleProcessors[eDocSheet] ||
|
|
mRuleProcessors[eStyleAttrSheet] ||
|
|
mRuleProcessors[eOverrideSheet]) {
|
|
PseudoRuleProcessorData data(presContext, aParentContent, aPseudoTag,
|
|
nsnull, mRuleWalker);
|
|
FileRules(EnumPseudoRulesMatching, &data);
|
|
|
|
if (!mRuleWalker->AtRoot())
|
|
result = GetContext(presContext, aParentContext, aPseudoTag).get();
|
|
|
|
// Now reset the walker back to the root of the tree.
|
|
mRuleWalker->Reset();
|
|
}
|
|
}
|
|
|
|
// For :before and :after pseudo-elements, having display: none or no
|
|
// 'content' property is equivalent to not having the pseudo-element
|
|
// at all.
|
|
if (result &&
|
|
(aPseudoTag == nsCSSPseudoElements::before ||
|
|
aPseudoTag == nsCSSPseudoElements::after)) {
|
|
const nsStyleDisplay *display = result->GetStyleDisplay();
|
|
const nsStyleContent *content = result->GetStyleContent();
|
|
// XXXldb What is contentCount for |content: ""|?
|
|
if (display->mDisplay == NS_STYLE_DISPLAY_NONE ||
|
|
content->ContentCount() == 0) {
|
|
result->Release();
|
|
result = nsnull;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void
|
|
nsStyleSet::BeginShutdown(nsPresContext* aPresContext)
|
|
{
|
|
mInShutdown = 1;
|
|
mRoots.Clear(); // no longer valid, since we won't keep it up to date
|
|
}
|
|
|
|
void
|
|
nsStyleSet::Shutdown(nsPresContext* aPresContext)
|
|
{
|
|
delete mRuleWalker;
|
|
mRuleWalker = nsnull;
|
|
|
|
mRuleTree->Destroy();
|
|
mRuleTree = nsnull;
|
|
|
|
mDefaultStyleData.Destroy(0, aPresContext);
|
|
}
|
|
|
|
static const PRInt32 kGCInterval = 1000;
|
|
|
|
void
|
|
nsStyleSet::NotifyStyleContextDestroyed(nsPresContext* aPresContext,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
if (mInShutdown)
|
|
return;
|
|
|
|
if (!aStyleContext->GetParent()) {
|
|
mRoots.RemoveElement(aStyleContext);
|
|
}
|
|
|
|
if (++mDestroyedCount == kGCInterval) {
|
|
mDestroyedCount = 0;
|
|
|
|
// Mark the style context tree by marking all roots, which will mark
|
|
// all descendants. This will reach style contexts in the
|
|
// undisplayed map and "additional style contexts" since they are
|
|
// descendants of the root.
|
|
for (PRInt32 i = mRoots.Count() - 1; i >= 0; --i) {
|
|
NS_STATIC_CAST(nsStyleContext*,mRoots[i])->Mark();
|
|
}
|
|
|
|
// Sweep the rule tree.
|
|
NS_ASSERTION(mRuleWalker->AtRoot(), "Rule walker should be at root");
|
|
#ifdef DEBUG
|
|
PRBool deleted =
|
|
#endif
|
|
mRuleTree->Sweep();
|
|
|
|
NS_ASSERTION(!deleted, "Root node must not be gc'd");
|
|
}
|
|
}
|
|
|
|
void
|
|
nsStyleSet::ClearStyleData(nsPresContext* aPresContext)
|
|
{
|
|
mRuleTree->ClearStyleData();
|
|
|
|
for (PRInt32 i = mRoots.Count() - 1; i >= 0; --i) {
|
|
NS_STATIC_CAST(nsStyleContext*,mRoots[i])->ClearStyleData(aPresContext);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsStyleSet::ReParentStyleContext(nsPresContext* aPresContext,
|
|
nsStyleContext* aStyleContext,
|
|
nsStyleContext* aNewParentContext)
|
|
{
|
|
NS_ASSERTION(aPresContext, "must have pres context");
|
|
NS_ASSERTION(aStyleContext, "must have style context");
|
|
|
|
if (aPresContext && aStyleContext) {
|
|
if (aStyleContext->GetParent() == aNewParentContext) {
|
|
aStyleContext->AddRef();
|
|
return aStyleContext;
|
|
}
|
|
else { // really a new parent
|
|
nsIAtom* pseudoTag = aStyleContext->GetPseudoType();
|
|
|
|
nsRuleNode* ruleNode = aStyleContext->GetRuleNode();
|
|
mRuleWalker->SetCurrentNode(ruleNode);
|
|
|
|
already_AddRefed<nsStyleContext> result =
|
|
GetContext(aPresContext, aNewParentContext, pseudoTag);
|
|
mRuleWalker->Reset();
|
|
return result;
|
|
}
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
struct StatefulData : public StateRuleProcessorData {
|
|
StatefulData(nsPresContext* aPresContext,
|
|
nsIContent* aContent, PRInt32 aStateMask)
|
|
: StateRuleProcessorData(aPresContext, aContent, aStateMask),
|
|
mHint(nsReStyleHint(0))
|
|
{}
|
|
nsReStyleHint mHint;
|
|
};
|
|
|
|
static PRBool SheetHasStatefulStyle(nsIStyleRuleProcessor* aProcessor,
|
|
void *aData)
|
|
{
|
|
StatefulData* data = (StatefulData*)aData;
|
|
nsReStyleHint hint;
|
|
aProcessor->HasStateDependentStyle(data, &hint);
|
|
data->mHint = nsReStyleHint(data->mHint | hint);
|
|
return PR_TRUE; // continue
|
|
}
|
|
|
|
// Test if style is dependent on content state
|
|
nsReStyleHint
|
|
nsStyleSet::HasStateDependentStyle(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
PRInt32 aStateMask)
|
|
{
|
|
nsReStyleHint result = nsReStyleHint(0);
|
|
|
|
if (aContent->IsContentOfType(nsIContent::eELEMENT) &&
|
|
(mRuleProcessors[eAgentSheet] ||
|
|
mRuleProcessors[ePresHintSheet] ||
|
|
mRuleProcessors[eUserSheet] ||
|
|
mRuleProcessors[eHTMLPresHintSheet] ||
|
|
mRuleProcessors[eDocSheet] ||
|
|
mRuleProcessors[eStyleAttrSheet] ||
|
|
mRuleProcessors[eOverrideSheet])) {
|
|
StatefulData data(aPresContext, aContent, aStateMask);
|
|
WalkRuleProcessors(SheetHasStatefulStyle, &data);
|
|
result = data.mHint;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
struct AttributeData : public AttributeRuleProcessorData {
|
|
AttributeData(nsPresContext* aPresContext,
|
|
nsIContent* aContent, nsIAtom* aAttribute, PRInt32 aModType)
|
|
: AttributeRuleProcessorData(aPresContext, aContent, aAttribute, aModType),
|
|
mHint(nsReStyleHint(0))
|
|
{}
|
|
nsReStyleHint mHint;
|
|
};
|
|
|
|
static PRBool
|
|
SheetHasAttributeStyle(nsIStyleRuleProcessor* aProcessor, void *aData)
|
|
{
|
|
AttributeData* data = (AttributeData*)aData;
|
|
nsReStyleHint hint;
|
|
aProcessor->HasAttributeDependentStyle(data, &hint);
|
|
data->mHint = nsReStyleHint(data->mHint | hint);
|
|
return PR_TRUE; // continue
|
|
}
|
|
|
|
// Test if style is dependent on content state
|
|
nsReStyleHint
|
|
nsStyleSet::HasAttributeDependentStyle(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aModType)
|
|
{
|
|
nsReStyleHint result = nsReStyleHint(0);
|
|
|
|
if (aContent->IsContentOfType(nsIContent::eELEMENT) &&
|
|
(mRuleProcessors[eAgentSheet] ||
|
|
mRuleProcessors[ePresHintSheet] ||
|
|
mRuleProcessors[eUserSheet] ||
|
|
mRuleProcessors[eHTMLPresHintSheet] ||
|
|
mRuleProcessors[eDocSheet] ||
|
|
mRuleProcessors[eStyleAttrSheet] ||
|
|
mRuleProcessors[eOverrideSheet])) {
|
|
AttributeData data(aPresContext, aContent, aAttribute, aModType);
|
|
WalkRuleProcessors(SheetHasAttributeStyle, &data);
|
|
result = data.mHint;
|
|
}
|
|
|
|
return result;
|
|
}
|