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1 /* |
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2 * Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Parses SAC selector to find out its selector type |
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15 * |
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16 */ |
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17 |
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18 |
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19 package com.nokia.tools.themeinstaller.cssparser; |
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20 |
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21 import org.w3c.css.sac.CSSException; |
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22 import org.w3c.css.sac.CombinatorCondition; |
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23 import org.w3c.css.sac.Condition; |
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24 import org.w3c.css.sac.ConditionalSelector; |
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25 import org.w3c.css.sac.DescendantSelector; |
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26 import org.w3c.css.sac.Selector; |
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27 |
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28 /** |
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29 * Parses SAC Selector in order to find out if selector has pseudo condition. |
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30 |
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31 * For example selector "element.class:pseudo" is recognized as Conditional |
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32 * Selector and the Selector's condition is ".class:pseudo" is recognized as |
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33 * SAC_AND_CONDITION. |
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34 * |
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35 * After SAC_AND_CONDITION is parsed to two different conditions : ".class" and |
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36 * ":pseudo", it is possible to tell that the original selector is Pseudo |
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37 * Selector |
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38 * |
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39 */ |
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40 public class CSSSelectorParser |
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41 { |
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42 |
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43 /** |
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44 * Checks if Selector is pseudo selector. |
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45 * |
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46 * @param aSelector The selector |
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47 * |
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48 * @return true, if is pseudo selector |
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49 */ |
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50 public static boolean isPseudo( Selector aSelector ) |
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51 { |
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52 switch ( aSelector.getSelectorType() ) |
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53 { |
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54 case Selector.SAC_ELEMENT_NODE_SELECTOR: |
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55 { |
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56 return false; |
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57 } |
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58 case Selector.SAC_CONDITIONAL_SELECTOR: |
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59 { |
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60 ConditionalSelector cSelector = ( ConditionalSelector ) aSelector; |
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61 return isPseudoCondition( cSelector.getCondition() ); |
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62 } |
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63 case Selector.SAC_CHILD_SELECTOR: |
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64 { |
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65 DescendantSelector dSelector = ( DescendantSelector ) aSelector; |
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66 return isPseudo( dSelector.getSimpleSelector() ); |
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67 } |
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68 case Selector.SAC_DESCENDANT_SELECTOR: |
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69 { |
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70 DescendantSelector dSelector = ( DescendantSelector ) aSelector; |
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71 return isPseudo( dSelector.getSimpleSelector() ); |
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72 } |
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73 case Selector.SAC_ANY_NODE_SELECTOR: |
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74 case Selector.SAC_DIRECT_ADJACENT_SELECTOR: |
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75 case Selector.SAC_CDATA_SECTION_NODE_SELECTOR: |
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76 case Selector.SAC_COMMENT_NODE_SELECTOR: |
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77 case Selector.SAC_NEGATIVE_SELECTOR: |
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78 case Selector.SAC_PROCESSING_INSTRUCTION_NODE_SELECTOR: |
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79 case Selector.SAC_PSEUDO_ELEMENT_SELECTOR: |
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80 case Selector.SAC_ROOT_NODE_SELECTOR: |
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81 case Selector.SAC_TEXT_NODE_SELECTOR: |
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82 { |
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83 throw new CSSException( "Selector : " |
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84 + aSelector.getSelectorType() + " not supported" ); |
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85 } |
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86 default: |
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87 throw new CSSException( "Unknown selector : " |
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88 + aSelector.getSelectorType() ); |
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89 } |
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90 } |
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91 |
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92 /** |
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93 * Checks if SAC Condition is pseudo condition. |
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94 * |
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95 * @param aCondition The condition |
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96 * |
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97 * @return true, if is pseudo condition |
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98 */ |
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99 private static boolean isPseudoCondition( Condition aCondition ) |
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100 { |
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101 switch ( aCondition.getConditionType() ) |
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102 { |
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103 case Condition.SAC_ID_CONDITION: |
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104 { |
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105 return false; |
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106 } |
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107 case Condition.SAC_CLASS_CONDITION: |
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108 { |
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109 return false; |
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110 } |
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111 case Condition.SAC_AND_CONDITION: |
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112 { |
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113 CombinatorCondition combCondition = ( CombinatorCondition ) aCondition; |
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114 return isPseudoCondition( combCondition.getFirstCondition() ) |
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115 || isPseudoCondition( combCondition |
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116 .getSecondCondition() ); |
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117 } |
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118 case Condition.SAC_PSEUDO_CLASS_CONDITION: |
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119 { |
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120 return true; |
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121 } |
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122 case Condition.SAC_ATTRIBUTE_CONDITION: |
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123 case Condition.SAC_ONE_OF_ATTRIBUTE_CONDITION: |
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124 case Condition.SAC_BEGIN_HYPHEN_ATTRIBUTE_CONDITION: |
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125 case Condition.SAC_OR_CONDITION: |
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126 case Condition.SAC_NEGATIVE_CONDITION: |
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127 case Condition.SAC_POSITIONAL_CONDITION: |
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128 case Condition.SAC_LANG_CONDITION: |
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129 case Condition.SAC_ONLY_CHILD_CONDITION: |
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130 case Condition.SAC_ONLY_TYPE_CONDITION: |
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131 case Condition.SAC_CONTENT_CONDITION: |
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132 { |
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133 throw new CSSException( "condition : " |
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134 + aCondition.getConditionType() + " not supported" ); |
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135 |
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136 } |
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137 default: |
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138 throw new CSSException( "Unknown condition : " |
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139 + aCondition.getConditionType() ); |
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140 } |
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141 } |
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142 } |