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1 /* |
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2 * (C) 1999-2003 Lars Knoll (knoll@kde.org) |
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3 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved. |
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4 * |
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5 * This library is free software; you can redistribute it and/or |
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6 * modify it under the terms of the GNU Library General Public |
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7 * License as published by the Free Software Foundation; either |
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8 * version 2 of the License, or (at your option) any later version. |
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9 * |
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10 * This library is distributed in the hope that it will be useful, |
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 * Library General Public License for more details. |
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14 * |
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15 * You should have received a copy of the GNU Library General Public License |
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16 * along with this library; see the file COPYING.LIB. If not, write to |
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17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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18 * Boston, MA 02110-1301, USA. |
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19 */ |
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20 |
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21 #include "config.h" |
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22 #include "CSSStyleSheet.h" |
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23 |
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24 #include "CSSImportRule.h" |
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25 #include "CSSNamespace.h" |
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26 #include "CSSParser.h" |
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27 #include "CSSRuleList.h" |
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28 #include "Document.h" |
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29 #include "ExceptionCode.h" |
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30 #include "Node.h" |
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31 #if PLATFORM(SYMBIAN) |
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32 #include "oom.h" |
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33 #endif |
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34 |
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35 namespace WebCore { |
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36 |
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37 CSSStyleSheet::CSSStyleSheet(CSSStyleSheet* parentSheet, const String& href, const String& charset) |
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38 : StyleSheet(parentSheet, href) |
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39 , m_doc(parentSheet ? parentSheet->doc() : 0) |
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40 , m_namespaces(0) |
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41 , m_charset(charset) |
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42 , m_loadCompleted(false) |
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43 { |
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44 } |
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45 |
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46 CSSStyleSheet::CSSStyleSheet(Node *parentNode, const String& href, const String& charset) |
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47 : StyleSheet(parentNode, href) |
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48 , m_doc(parentNode->document()) |
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49 , m_namespaces(0) |
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50 , m_charset(charset) |
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51 , m_loadCompleted(false) |
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52 { |
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53 } |
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54 |
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55 CSSStyleSheet::CSSStyleSheet(CSSRule *ownerRule, const String& href, const String& charset) |
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56 : StyleSheet(ownerRule, href) |
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57 , m_doc(0) |
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58 , m_namespaces(0) |
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59 , m_charset(charset) |
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60 , m_loadCompleted(false) |
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61 { |
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62 } |
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63 |
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64 CSSStyleSheet::~CSSStyleSheet() |
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65 { |
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66 delete m_namespaces; |
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67 } |
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68 |
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69 CSSRule *CSSStyleSheet::ownerRule() const |
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70 { |
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71 return (parent() && parent()->isRule()) ? static_cast<CSSRule*>(parent()) : 0; |
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72 } |
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73 |
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74 unsigned CSSStyleSheet::insertRule(const String& rule, unsigned index, ExceptionCode& ec) |
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75 { |
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76 ec = 0; |
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77 if (index > length()) { |
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78 ec = INDEX_SIZE_ERR; |
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79 return 0; |
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80 } |
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81 CSSParser p(useStrictParsing()); |
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82 RefPtr<CSSRule> r = p.parseRule(this, rule); |
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83 |
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84 if (!r) { |
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85 ec = SYNTAX_ERR; |
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86 return 0; |
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87 } |
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88 |
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89 // ### |
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90 // HIERARCHY_REQUEST_ERR: Raised if the rule cannot be inserted at the specified index e.g. if an |
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91 //@import rule is inserted after a standard rule set or other at-rule. |
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92 insert(index, r.release()); |
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93 |
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94 styleSheetChanged(); |
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95 |
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96 return index; |
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97 } |
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98 |
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99 int CSSStyleSheet::addRule(const String& selector, const String& style, int index, ExceptionCode& ec) |
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100 { |
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101 insertRule(selector + " { " + style + " }", index, ec); |
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102 |
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103 // As per Microsoft documentation, always return -1. |
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104 return -1; |
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105 } |
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106 |
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107 int CSSStyleSheet::addRule(const String& selector, const String& style, ExceptionCode& ec) |
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108 { |
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109 return addRule(selector, style, length(), ec); |
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110 } |
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111 |
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112 |
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113 CSSRuleList* CSSStyleSheet::cssRules(bool omitCharsetRules) |
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114 { |
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115 return new CSSRuleList(this, omitCharsetRules); |
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116 } |
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117 |
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118 void CSSStyleSheet::deleteRule(unsigned index, ExceptionCode& ec) |
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119 { |
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120 if (index >= length()) { |
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121 ec = INDEX_SIZE_ERR; |
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122 return; |
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123 } |
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124 |
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125 ec = 0; |
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126 remove(index); |
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127 styleSheetChanged(); |
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128 } |
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129 |
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130 void CSSStyleSheet::addNamespace(CSSParser* p, const AtomicString& prefix, const AtomicString& uri) |
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131 { |
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132 if (uri.isEmpty()) |
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133 return; |
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134 |
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135 m_namespaces = new CSSNamespace(prefix, uri, m_namespaces); |
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136 |
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137 if (prefix.isEmpty()) |
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138 // Set the default namespace on the parser so that selectors that omit namespace info will |
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139 // be able to pick it up easily. |
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140 p->defaultNamespace = uri; |
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141 } |
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142 |
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143 const AtomicString& CSSStyleSheet::determineNamespace(const AtomicString& prefix) |
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144 { |
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145 if (prefix.isEmpty()) |
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146 return nullAtom; // No namespace. If an element/attribute has a namespace, we won't match it. |
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147 else if (prefix == starAtom) |
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148 return starAtom; // We'll match any namespace. |
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149 else if (m_namespaces) { |
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150 CSSNamespace* ns = m_namespaces->namespaceForPrefix(prefix); |
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151 if (ns) |
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152 return ns->uri(); |
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153 } |
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154 return nullAtom; // Assume we wont match any namespaces. |
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155 } |
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156 |
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157 bool CSSStyleSheet::parseString(const String &string, bool strict) |
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158 { |
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159 #if PLATFORM(SYMBIAN) |
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160 OOM_PRE_CHECK(string.length() * 7, 0, "CSSStyleSheet::parseString" ) |
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161 #endif |
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162 |
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163 setStrictParsing(strict); |
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164 CSSParser p(strict); |
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165 p.parseSheet(this, string); |
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166 #if PLATFORM(SYMBIAN) |
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167 OOM_POST_CHECK_FAILED(return false;) |
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168 #endif |
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169 return true; |
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170 } |
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171 |
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172 bool CSSStyleSheet::isLoading() |
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173 { |
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174 unsigned len = length(); |
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175 for (unsigned i = 0; i < len; ++i) { |
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176 StyleBase* rule = item(i); |
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177 if (rule->isImportRule() && static_cast<CSSImportRule*>(rule)->isLoading()) |
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178 return true; |
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179 } |
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180 return false; |
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181 } |
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182 |
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183 void CSSStyleSheet::checkLoaded() |
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184 { |
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185 if (isLoading()) |
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186 return; |
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187 if (parent()) |
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188 parent()->checkLoaded(); |
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189 m_loadCompleted = m_parentNode ? m_parentNode->sheetLoaded() : true; |
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190 } |
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191 |
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192 DocLoader *CSSStyleSheet::docLoader() |
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193 { |
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194 if (!m_doc) // doc is 0 for the user- and default-sheet! |
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195 return 0; |
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196 |
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197 // ### remove? (clients just use sheet->doc()->docLoader()) |
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198 return m_doc->docLoader(); |
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199 } |
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200 |
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201 void CSSStyleSheet::styleSheetChanged() |
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202 { |
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203 StyleBase* root = this; |
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204 while (StyleBase* parent = root->parent()) |
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205 root = parent; |
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206 Document* documentToUpdate = (root && root->isCSSStyleSheet()) ? static_cast<CSSStyleSheet*>(root)->doc() : 0; |
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207 |
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208 /* FIXME: We don't need to do everything updateStyleSelector does, |
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209 * basically we just need to recreate the document's selector with the |
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210 * already existing style sheets. |
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211 */ |
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212 if (documentToUpdate) |
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213 documentToUpdate->updateStyleSelector(); |
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214 } |
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215 |
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216 } |