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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 // |
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43 // W A R N I N G |
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44 // ------------- |
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45 // |
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46 // This file is not part of the Qt API. It exists purely as an |
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47 // implementation detail. This header file may change from version to |
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48 // version without notice, or even be removed. |
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49 // |
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50 // We mean it. |
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51 |
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52 #ifndef Patternist_PatternPlatform_H |
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53 #define Patternist_PatternPlatform_H |
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54 |
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55 #include <QFlags> |
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56 #include <QRegExp> |
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57 |
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58 #include "qfunctioncall_p.h" |
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59 |
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60 QT_BEGIN_HEADER |
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61 |
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62 QT_BEGIN_NAMESPACE |
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63 |
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64 namespace QPatternist |
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65 { |
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66 /** |
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67 * @short Contains functionality for functions and expressions that |
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68 * uses regular expressions. |
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69 * |
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70 * @ingroup Patternist_utils |
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71 * @author Frans Englich <frans.englich@nokia.com> |
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72 */ |
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73 class PatternPlatform : public FunctionCall |
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74 { |
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75 public: |
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76 /** |
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77 * @see <a href="http://www.w3.org/TR/xpath-functions/#flags">XQuery 1.0 and |
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78 * XPath 2.0 Functions and Operators, 7.6.1.1 Flags</a> |
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79 */ |
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80 enum Flag |
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81 { |
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82 /** |
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83 * No flags are set. Default behavior is used. |
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84 */ |
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85 NoFlags = 0, |
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86 |
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87 /** |
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88 * Flag @c s |
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89 */ |
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90 DotAllMode = 1, |
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91 |
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92 /** |
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93 * Flag @c m |
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94 */ |
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95 MultiLineMode = 2, |
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96 |
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97 /** |
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98 * Flag @c i |
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99 */ |
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100 CaseInsensitive = 4, |
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101 |
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102 /** |
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103 * Flag @c x |
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104 */ |
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105 SimplifyWhitespace = 8 |
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106 }; |
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107 typedef QFlags<Flag> Flags; |
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108 |
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109 virtual Expression::Ptr compress(const StaticContext::Ptr &context); |
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110 |
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111 /** |
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112 * Retrieves the pattern supplied in the arguments, taking care of compiling it, |
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113 * settings its flags, and everything else required for getting it ready to use. If an error |
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114 * occurs, an appropriate error is raised via @p context. |
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115 */ |
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116 const QRegExp pattern(const DynamicContext::Ptr &context) const; |
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117 |
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118 /** |
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119 * @returns the number of captures, also called parenthesized sub-expressions, the pattern has. |
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120 * |
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121 * If the pattern isn't precompiled, -1 is returned. |
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122 */ |
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123 inline int captureCount() const; |
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124 |
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125 /** |
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126 * @short Parses pattern |
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127 */ |
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128 static QRegExp parsePattern(const QString &pattern, |
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129 const ReportContext::Ptr &context, |
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130 const SourceLocationReflection *const location); |
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131 |
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132 |
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133 protected: |
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134 /** |
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135 * @short This constructor is protected, because this class is supposed to be sub-classed. |
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136 * |
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137 * @param flagsPosition an index position specifying the operand containing the pattern |
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138 * flags. |
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139 */ |
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140 PatternPlatform(const qint8 flagsPosition); |
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141 |
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142 private: |
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143 /** |
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144 * Enum telling whether the flags, pattern, or both |
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145 * have been compiled at compile time. |
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146 */ |
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147 enum PreCompiledPart |
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148 { |
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149 NoPart = 0, |
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150 PatternPrecompiled = 1, |
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151 FlagsPrecompiled = 2, |
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152 FlagsAndPattern = PatternPrecompiled | FlagsPrecompiled |
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153 |
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154 }; |
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155 typedef QFlags<PreCompiledPart> PreCompiledParts; |
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156 |
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157 /** |
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158 * @short Calls the public parsePattern() function and passes in @c |
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159 * this as the location. |
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160 */ |
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161 inline QRegExp parsePattern(const QString &pattern, |
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162 const ReportContext::Ptr &context) const; |
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163 |
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164 Q_DISABLE_COPY(PatternPlatform) |
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165 |
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166 Flags parseFlags(const QString &flags, |
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167 const DynamicContext::Ptr &context) const; |
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168 |
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169 static void applyFlags(const Flags flags, QRegExp &pattern); |
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170 |
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171 /** |
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172 * The parts that have been pre-compiled at compile time. |
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173 */ |
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174 PreCompiledParts m_compiledParts; |
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175 Flags m_flags; |
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176 QRegExp m_pattern; |
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177 const qint8 m_flagsPosition; |
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178 }; |
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179 |
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180 inline int PatternPlatform::captureCount() const |
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181 { |
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182 if(m_compiledParts.testFlag(PatternPrecompiled)) |
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183 return m_pattern.numCaptures(); |
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184 else |
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185 return -1; |
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186 } |
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187 |
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188 Q_DECLARE_OPERATORS_FOR_FLAGS(PatternPlatform::Flags) |
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189 } |
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190 |
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191 QT_END_NAMESPACE |
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192 |
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193 QT_END_HEADER |
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194 |
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195 #endif |