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1 /*
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2 * This project is licensed under the MIT license. For more information see the
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3 * LICENSE file.
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4 */
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5 #pragma once
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6
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7 // -----------------------------------------------------------------------------
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8
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9 #include <functional>
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10 #include <regex>
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11 #include <string>
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12
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13 #include "maddy/blockparser.h"
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14
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15 // -----------------------------------------------------------------------------
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16
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17 namespace maddy {
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18
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19 // -----------------------------------------------------------------------------
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20
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21 /**
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22 * ChecklistParser
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23 *
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24 * @class
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25 */
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26 class ChecklistParser : public BlockParser
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27 {
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28 public:
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29 /**
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30 * ctor
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31 *
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32 * @method
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33 * @param {std::function<void(std::string&)>} parseLineCallback
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34 * @param {std::function<std::shared_ptr<BlockParser>(const std::string& line)>} getBlockParserForLineCallback
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35 */
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36 ChecklistParser(
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37 std::function<void(std::string&)> parseLineCallback,
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38 std::function<std::shared_ptr<BlockParser>(const std::string& line)> getBlockParserForLineCallback
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39 )
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40 : BlockParser(parseLineCallback, getBlockParserForLineCallback)
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41 , isStarted(false)
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42 , isFinished(false)
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43 {}
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44
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45 /**
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46 * IsStartingLine
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47 *
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48 * An unordered list starts with `* `.
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49 *
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50 * @method
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51 * @param {const std::string&} line
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52 * @return {bool}
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53 */
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54 static bool
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55 IsStartingLine(const std::string& line)
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56 {
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57 static std::regex re("^- \\[[x| ]\\] .*");
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58 return std::regex_match(line, re);
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59 }
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60
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61 /**
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62 * IsFinished
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63 *
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64 * @method
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65 * @return {bool}
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66 */
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67 bool
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68 IsFinished() const override
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69 {
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70 return this->isFinished;
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71 }
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72
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73 protected:
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74 bool
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75 isInlineBlockAllowed() const override
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76 {
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77 return true;
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78 }
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79
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80 bool
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81 isLineParserAllowed() const override
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82 {
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83 return true;
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84 }
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85
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86 void
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87 parseBlock(std::string& line) override
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88 {
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89 bool isStartOfNewListItem = IsStartingLine(line);
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90 uint32_t indentation = getIndentationWidth(line);
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91
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92 static std::regex lineRegex("^(- )");
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93 line = std::regex_replace(line, lineRegex, "");
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94
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95 static std::regex emptyBoxRegex("^\\[ \\]");
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96 static std::string emptyBoxReplacement = "<input type=\"checkbox\"/>";
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97 line = std::regex_replace(line, emptyBoxRegex, emptyBoxReplacement);
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98
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99 static std::regex boxRegex("^\\[x\\]");
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100 static std::string boxReplacement = "<input type=\"checkbox\" checked=\"checked\"/>";
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101 line = std::regex_replace(line, boxRegex, boxReplacement);
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102
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103 if (!this->isStarted)
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104 {
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105 line = "<ul class=\"checklist\"><li><label>" + line;
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106 this->isStarted = true;
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107 return;
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108 }
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109
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110 if (indentation >= 2)
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111 {
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112 line = line.substr(2);
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113 return;
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114 }
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115
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116 if (
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117 line.empty() ||
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118 line.find("</label></li><li><label>") != std::string::npos ||
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119 line.find("</label></li></ul>") != std::string::npos
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120 )
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121 {
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122 line = "</label></li></ul>" + line;
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123 this->isFinished = true;
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124 return;
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125 }
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126
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127 if (isStartOfNewListItem)
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128 {
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129 line = "</label></li><li><label>" + line;
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130 }
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131 }
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132
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133 private:
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134 bool isStarted;
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135 bool isFinished;
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136 }; // class ChecklistParser
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137
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138 // -----------------------------------------------------------------------------
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139
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140 } // namespace maddy
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