1/* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com) 4 * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com) 5 * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved. 6 * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org> 7 * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org> 8 * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 9 * Copyright (c) 2011, Code Aurora Forum. All rights reserved. 10 * Copyright (C) Research In Motion Limited 2011. All rights reserved. 11 * Copyright (C) 2012 Google Inc. All rights reserved. 12 * 13 * This library is free software; you can redistribute it and/or 14 * modify it under the terms of the GNU Library General Public 15 * License as published by the Free Software Foundation; either 16 * version 2 of the License, or (at your option) any later version. 17 * 18 * This library is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 * Library General Public License for more details. 22 * 23 * You should have received a copy of the GNU Library General Public License 24 * along with this library; see the file COPYING.LIB. If not, write to 25 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 26 * Boston, MA 02110-1301, USA. 27 */ 28 29#include "config.h" 30#include "CSSDefaultStyleSheets.h" 31 32#include "Chrome.h" 33#include "ChromeClient.h" 34#include "MediaQueryEvaluator.h" 35#include "Page.h" 36#include "RenderTheme.h" 37#include "RuleSet.h" 38#include "StyleSheetContents.h" 39#include "UserAgentStyleSheets.h" 40 41namespace WebCore { 42 43using namespace HTMLNames; 44 45RuleSet* CSSDefaultStyleSheets::defaultStyle; 46RuleSet* CSSDefaultStyleSheets::defaultQuirksStyle; 47RuleSet* CSSDefaultStyleSheets::defaultPrintStyle; 48RuleSet* CSSDefaultStyleSheets::defaultViewSourceStyle; 49 50StyleSheetContents* CSSDefaultStyleSheets::simpleDefaultStyleSheet; 51StyleSheetContents* CSSDefaultStyleSheets::defaultStyleSheet; 52StyleSheetContents* CSSDefaultStyleSheets::quirksStyleSheet; 53StyleSheetContents* CSSDefaultStyleSheets::svgStyleSheet; 54StyleSheetContents* CSSDefaultStyleSheets::mathMLStyleSheet; 55StyleSheetContents* CSSDefaultStyleSheets::mediaControlsStyleSheet; 56StyleSheetContents* CSSDefaultStyleSheets::fullscreenStyleSheet; 57StyleSheetContents* CSSDefaultStyleSheets::plugInsStyleSheet; 58 59// FIXME: It would be nice to use some mechanism that guarantees this is in sync with the real UA stylesheet. 60static const char* simpleUserAgentStyleSheet = "html,body,div{display:block}head{display:none}body{margin:8px}div:focus,span:focus{outline:auto 5px -webkit-focus-ring-color}a:-webkit-any-link{color:-webkit-link;text-decoration:underline}a:-webkit-any-link:active{color:-webkit-activelink}"; 61 62static inline bool elementCanUseSimpleDefaultStyle(Element* e) 63{ 64 return e->hasTagName(htmlTag) || e->hasTagName(headTag) || e->hasTagName(bodyTag) || e->hasTagName(divTag) || e->hasTagName(spanTag) || e->hasTagName(brTag) || e->hasTagName(aTag); 65} 66 67static const MediaQueryEvaluator& screenEval() 68{ 69 DEFINE_STATIC_LOCAL(const MediaQueryEvaluator, staticScreenEval, ("screen")); 70 return staticScreenEval; 71} 72 73static const MediaQueryEvaluator& printEval() 74{ 75 DEFINE_STATIC_LOCAL(const MediaQueryEvaluator, staticPrintEval, ("print")); 76 return staticPrintEval; 77} 78 79static StyleSheetContents* parseUASheet(const String& str) 80{ 81 StyleSheetContents* sheet = StyleSheetContents::create().leakRef(); // leak the sheet on purpose 82 sheet->parseString(str); 83 return sheet; 84} 85 86static StyleSheetContents* parseUASheet(const char* characters, unsigned size) 87{ 88 return parseUASheet(String(characters, size)); 89} 90 91void CSSDefaultStyleSheets::initDefaultStyle(Element* root) 92{ 93 if (!defaultStyle) { 94 if (!root || elementCanUseSimpleDefaultStyle(root)) 95 loadSimpleDefaultStyle(); 96 else 97 loadFullDefaultStyle(); 98 } 99} 100 101void CSSDefaultStyleSheets::loadFullDefaultStyle() 102{ 103 if (simpleDefaultStyleSheet) { 104 ASSERT(defaultStyle); 105 ASSERT(defaultPrintStyle == defaultStyle); 106 delete defaultStyle; 107 simpleDefaultStyleSheet->deref(); 108 defaultStyle = RuleSet::create().leakPtr(); 109 defaultPrintStyle = RuleSet::create().leakPtr(); 110 simpleDefaultStyleSheet = 0; 111 } else { 112 ASSERT(!defaultStyle); 113 defaultStyle = RuleSet::create().leakPtr(); 114 defaultPrintStyle = RuleSet::create().leakPtr(); 115 defaultQuirksStyle = RuleSet::create().leakPtr(); 116 } 117 118 // Strict-mode rules. 119 String defaultRules = String(htmlUserAgentStyleSheet, sizeof(htmlUserAgentStyleSheet)) + RenderTheme::defaultTheme()->extraDefaultStyleSheet(); 120 defaultStyleSheet = parseUASheet(defaultRules); 121 defaultStyle->addRulesFromSheet(defaultStyleSheet, screenEval()); 122 defaultPrintStyle->addRulesFromSheet(defaultStyleSheet, printEval()); 123 124 // Quirks-mode rules. 125 String quirksRules = String(quirksUserAgentStyleSheet, sizeof(quirksUserAgentStyleSheet)) + RenderTheme::defaultTheme()->extraQuirksStyleSheet(); 126 quirksStyleSheet = parseUASheet(quirksRules); 127 defaultQuirksStyle->addRulesFromSheet(quirksStyleSheet, screenEval()); 128} 129 130void CSSDefaultStyleSheets::loadSimpleDefaultStyle() 131{ 132 ASSERT(!defaultStyle); 133 ASSERT(!simpleDefaultStyleSheet); 134 135 defaultStyle = RuleSet::create().leakPtr(); 136 // There are no media-specific rules in the simple default style. 137 defaultPrintStyle = defaultStyle; 138 defaultQuirksStyle = RuleSet::create().leakPtr(); 139 140 simpleDefaultStyleSheet = parseUASheet(simpleUserAgentStyleSheet, strlen(simpleUserAgentStyleSheet)); 141 defaultStyle->addRulesFromSheet(simpleDefaultStyleSheet, screenEval()); 142 143 // No need to initialize quirks sheet yet as there are no quirk rules for elements allowed in simple default style. 144} 145 146RuleSet* CSSDefaultStyleSheets::viewSourceStyle() 147{ 148 if (!defaultViewSourceStyle) { 149 defaultViewSourceStyle = RuleSet::create().leakPtr(); 150 defaultViewSourceStyle->addRulesFromSheet(parseUASheet(sourceUserAgentStyleSheet, sizeof(sourceUserAgentStyleSheet)), screenEval()); 151 } 152 return defaultViewSourceStyle; 153} 154 155 156void CSSDefaultStyleSheets::ensureDefaultStyleSheetsForElement(Element* element, bool& changedDefaultStyle) 157{ 158 if (simpleDefaultStyleSheet && !elementCanUseSimpleDefaultStyle(element)) { 159 loadFullDefaultStyle(); 160 changedDefaultStyle = true; 161 } 162 163#if ENABLE(SVG) 164 if (element->isSVGElement() && !svgStyleSheet) { 165 // SVG rules. 166 svgStyleSheet = parseUASheet(svgUserAgentStyleSheet, sizeof(svgUserAgentStyleSheet)); 167 defaultStyle->addRulesFromSheet(svgStyleSheet, screenEval()); 168 defaultPrintStyle->addRulesFromSheet(svgStyleSheet, printEval()); 169 changedDefaultStyle = true; 170 } 171#endif 172 173#if ENABLE(MATHML) 174 if (element->isMathMLElement() && !mathMLStyleSheet) { 175 // MathML rules. 176 mathMLStyleSheet = parseUASheet(mathmlUserAgentStyleSheet, sizeof(mathmlUserAgentStyleSheet)); 177 defaultStyle->addRulesFromSheet(mathMLStyleSheet, screenEval()); 178 defaultPrintStyle->addRulesFromSheet(mathMLStyleSheet, printEval()); 179 changedDefaultStyle = true; 180 } 181#endif 182 183#if ENABLE(VIDEO) 184 if (!mediaControlsStyleSheet && (element->hasTagName(videoTag) || element->hasTagName(audioTag))) { 185 String mediaRules = String(mediaControlsUserAgentStyleSheet, sizeof(mediaControlsUserAgentStyleSheet)) + RenderTheme::themeForPage(element->document()->page())->extraMediaControlsStyleSheet(); 186 mediaControlsStyleSheet = parseUASheet(mediaRules); 187 defaultStyle->addRulesFromSheet(mediaControlsStyleSheet, screenEval()); 188 defaultPrintStyle->addRulesFromSheet(mediaControlsStyleSheet, printEval()); 189 changedDefaultStyle = true; 190 } 191#endif 192 193#if ENABLE(FULLSCREEN_API) 194 if (!fullscreenStyleSheet && element->document()->webkitIsFullScreen()) { 195 String fullscreenRules = String(fullscreenUserAgentStyleSheet, sizeof(fullscreenUserAgentStyleSheet)) + RenderTheme::defaultTheme()->extraFullScreenStyleSheet(); 196 fullscreenStyleSheet = parseUASheet(fullscreenRules); 197 defaultStyle->addRulesFromSheet(fullscreenStyleSheet, screenEval()); 198 defaultQuirksStyle->addRulesFromSheet(fullscreenStyleSheet, screenEval()); 199 changedDefaultStyle = true; 200 } 201#endif 202 203 if (!plugInsStyleSheet && (element->hasTagName(objectTag) || element->hasTagName(embedTag))) { 204 String plugInsRules = RenderTheme::themeForPage(element->document()->page())->extraPlugInsStyleSheet() + element->document()->page()->chrome().client()->plugInExtraStyleSheet(); 205 if (plugInsRules.isEmpty()) 206 plugInsRules = String(plugInsUserAgentStyleSheet, sizeof(plugInsUserAgentStyleSheet)); 207 plugInsStyleSheet = parseUASheet(plugInsRules); 208 defaultStyle->addRulesFromSheet(plugInsStyleSheet, screenEval()); 209 changedDefaultStyle = true; 210 } 211 212 ASSERT(defaultStyle->features().idsInRules.isEmpty()); 213 ASSERT(mathMLStyleSheet || defaultStyle->features().siblingRules.isEmpty()); 214} 215 216} // namespace WebCore 217