1 | # line directives |
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2 | # block directives |
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3 | # field lines |
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4 | # comments |
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5 | |
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6 | { |
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7 | #$::RD_TRACE = 1; |
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8 | my ( |
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9 | @sections, # master data structure |
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10 | $section_head, |
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11 | $section_id, |
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12 | @lines, # lines in each section |
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13 | %lists, |
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14 | %patterns, |
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15 | %subs, # validation subs |
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16 | @group, # current group |
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17 | %groups, # stored groups of fields |
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18 | $type, |
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19 | @options, |
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20 | $required, |
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21 | $multiple, |
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22 | $list_var, |
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23 | $size, |
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24 | $maxlength, |
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25 | $rows, |
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26 | $cols, |
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27 | @submit, |
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28 | ); |
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29 | my $context = 'line'; # start in line context by default |
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30 | my %formspec; |
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31 | |
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32 | # TODO: helper sub? |
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33 | sub alert ($) { |
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34 | warn '[' . (split(/::/, (caller(1))[3]))[-1] . '] ' . shift() . "\n"; |
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35 | } |
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36 | } |
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37 | |
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38 | form_spec: |
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39 | { |
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40 | %formspec = (); # clear the old formspec data |
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41 | } |
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42 | (list_def | description_def | group_def | note | unknown_block_directive | line)(s) |
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43 | { |
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44 | # grab the last section, if there is any |
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45 | if (@lines) { |
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46 | push @sections, |
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47 | { |
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48 | id => $section_id, |
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49 | head => $section_head, |
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50 | lines => [ @lines ], |
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51 | }; |
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52 | } |
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53 | |
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54 | $return = { |
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55 | title => $formspec{title}, |
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56 | author => $formspec{author}, |
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57 | description => $formspec{description}, |
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58 | lists => \%lists, |
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59 | patterns => \%patterns, |
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60 | subs => \%subs, |
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61 | groups => \%groups, |
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62 | sections => \@sections, |
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63 | ( @submit ? |
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64 | (submit => @submit == 1 ? $submit[0] : \@submit) : |
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65 | () |
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66 | ), |
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67 | reset => $formspec{reset}, |
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68 | } |
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69 | } |
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70 | |
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71 | list_def: '!list' var_name (static_list | dynamic_list) |
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72 | { $lists{$item{var_name}} = [ @options ]; @options = () } |
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73 | |
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74 | static_list: '{' /\s*/ option(s /\s*,\s*/) /,?/ /\s*/ '}' |
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75 | |
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76 | dynamic_list: '&' <perl_codeblock> |
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77 | { warn "[Text::FormBuilder] Dynamic lists have been removed from the formspec grammar"; } |
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78 | |
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79 | description_def: '!description' block |
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80 | { |
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81 | warn "[Text::FormBuilder] Description redefined at input text line $thisline\n" if defined $formspec{description}; |
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82 | $formspec{description} = $item{block}; |
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83 | } |
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84 | |
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85 | group_def: '!group' { $context = 'group' } var_name '{' field_line(s) '}' { $context = 'line' } |
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86 | { |
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87 | #warn "$item{var_name} group; context $context\n" |
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88 | $groups{$item{var_name}} = [ @group ]; |
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89 | @group = (); |
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90 | } |
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91 | |
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92 | note: '!note' block { push @lines, [ 'note', $item{block} ]; } |
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93 | |
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94 | |
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95 | # curly-brace delimited block, that can contain properly |
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96 | # nested curly braces, along with any other characters |
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97 | # inner blocks return with the '{...}' so that nested |
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98 | # blocks get the braces treated as literals |
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99 | block: '{' <skip:''> block_content(s) '}' { join('', @{ $item[3] }) } |
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100 | inner_block: '{' <skip:''> block_content(s) '}' { '{' . join('', @{ $item[3] }) . '}' } |
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101 | block_content: /[^\{\}]+?/ | inner_block |
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102 | |
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103 | # square brace delimited block, that can contain properly |
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104 | # nested square brackets, along with any other characters |
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105 | # inner bracket blocks return with the '[...]' so that nested |
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106 | # blocks get the braces treated as literals |
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107 | bracket_block: '[' <skip:''> bracket_block_content(s) ']' { join('', @{ $item[3] }) } |
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108 | inner_bracket_block: '[' <skip:''> bracket_block_content(s) ']' { '[' . join('', @{ $item[3] }) . ']'; } |
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109 | bracket_block_content: /[^\[\]]+?/ | inner_bracket_block |
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110 | |
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111 | |
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112 | # field lines are the subset of lines that are allowed in a !group directive |
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113 | field_line: <skip:'[ \t]*'> ( field | comment | blank ) "\n" |
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114 | |
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115 | line: <skip:'[ \t]*'> ( title | author | pattern_def | section_head | heading | submit | reset | group_field | field_group | unknown_directive | field | comment | blank ) /\n+/ |
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116 | |
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117 | title: '!title' /.*/ |
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118 | { |
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119 | warn "[Text::FormBuilder] Title redefined at input text line $thisline\n" if defined $formspec{title}; |
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120 | $formspec{title} = $item[2]; |
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121 | } |
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122 | |
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123 | author: '!author' /.*/ |
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124 | { |
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125 | warn "[Text::FormBuilder] Author redefined at input text line $thisline\n" if defined $formspec{author}; |
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126 | $formspec{author} = $item[2]; |
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127 | } |
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128 | |
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129 | pattern_def: '!pattern' var_name pattern |
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130 | { $patterns{$item{var_name}} = $item{pattern} } |
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131 | |
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132 | pattern: /.*/ |
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133 | |
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134 | section_head: '!section' identifier /.*/ |
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135 | { |
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136 | #warn "starting section $item{identifier}\n"; |
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137 | #warn " with heading $item[3]\n" if $item[3]; |
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138 | |
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139 | if (@lines) { |
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140 | push @sections, |
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141 | { |
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142 | id => $section_id, |
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143 | head => $section_head, |
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144 | lines => [ @lines ], |
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145 | }; |
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146 | } |
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147 | |
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148 | $section_id = $item{identifier}; |
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149 | $section_head = $item[3]; |
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150 | @lines = (); |
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151 | } |
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152 | |
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153 | heading: '!head' /.*/ { push @lines, [ 'head', $item[2] ] } |
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154 | |
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155 | submit: '!submit' string(s /\s*,\s*/) |
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156 | { |
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157 | #warn scalar(@{ $item[2] }) . ' submit button(s)'; |
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158 | push @submit, @{ $item[2] }; |
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159 | } |
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160 | |
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161 | reset: '!reset' string |
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162 | { |
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163 | warn "[Text::FormBuilder] Reset button redefined at input text line $thisline\n" if defined $formspec{reset}; |
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164 | $formspec{reset} = $item{string}; |
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165 | } |
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166 | |
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167 | group_field: '!field' group_name name label(?) |
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168 | { |
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169 | warn "WARNING line $thisline: The '!field' directive has been DEPRECATED. Use the 'name:GROUP' style instead.\n"; |
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170 | push @lines, [ 'group', { name => $item{name}, label => $item{'label(?)'}[0], group => $item{group_name} } ]; |
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171 | } |
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172 | |
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173 | group_name: /%[A-Z_]+/ |
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174 | |
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175 | field_group: name label(?) hint(?) group_type comment(?) |
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176 | { |
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177 | #warn "[$thisline] comment = $item{'hint(?)'}[0]\n" if $item{'hint(?)'}[0]; |
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178 | #warn "[$thisline] field $item{name} is $item{group_type}\n"; |
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179 | push @lines, [ 'group', { |
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180 | name => $item{name}, |
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181 | label => $item{'label(?)'}[0], |
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182 | comment => $item{'hint(?)'}[0], |
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183 | group => $item{group_type}, |
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184 | } ]; |
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185 | } |
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186 | |
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187 | group_type: ':' var_name |
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188 | |
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189 | # this is the real heart of the thing |
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190 | field: name field_size(?) growable(?) label(?) hint(?) type(?) multi(?) other(?) default(?) option_list(?) validate(?) comment(?) |
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191 | { |
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192 | my $field = { |
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193 | name => $item{name}, |
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194 | growable => $item{'growable(?)'}[0], |
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195 | label => $item{'label(?)'}[0], |
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196 | comment => $item{'hint(?)'}[0], |
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197 | multiple => $item{'multi(?)'}[0], |
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198 | type => $item{'type(?)'}[0], |
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199 | other => $item{'other(?)'}[0], |
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200 | value => $item{'default(?)'}[0], |
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201 | list => $list_var, |
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202 | validate => $item{'validate(?)'}[0], |
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203 | required => $required, |
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204 | }; |
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205 | |
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206 | $$field{options} = [ @options ] if @options; |
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207 | |
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208 | $$field{rows} = $rows if defined $rows; |
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209 | $$field{cols} = $cols if defined $cols; |
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210 | $$field{size} = $size if defined $size; |
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211 | $$field{maxlength} = $maxlength if defined $maxlength; |
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212 | |
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213 | #warn "[$thisline] field $item{name}; context $context\n"; |
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214 | if ($context eq 'group') { |
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215 | push @group, $field; |
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216 | } else { |
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217 | push @lines, [ 'field', $field ]; |
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218 | } |
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219 | |
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220 | $type = undef; |
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221 | $required = undef; |
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222 | $multiple = undef; |
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223 | $list_var = undef; |
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224 | $size = undef; |
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225 | $rows = undef; |
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226 | $cols = undef; |
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227 | $maxlength = undef; |
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228 | @options = (); |
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229 | |
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230 | $field; |
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231 | } |
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232 | |
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233 | name: identifier |
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234 | |
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235 | var_name: /[A-Z_]+/ |
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236 | |
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237 | field_size: '[' ( row_col | size ) ']' |
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238 | |
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239 | size: /\d+/ bang(?) |
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240 | { $maxlength = $item[1] if $item[2][0]; $size = $item[1] } |
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241 | |
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242 | bang: '!' |
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243 | |
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244 | row_col: /\d+/ /,\s*/ /\d+/ |
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245 | { $rows = $item[1]; $cols = $item[3] } |
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246 | |
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247 | growable: '*' limit(?) { $item{'limit(?)'}[0] || 1 } |
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248 | |
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249 | limit: /\d+/ |
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250 | |
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251 | label: '|' string { $item[2] } |
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252 | |
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253 | hint: bracket_block |
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254 | |
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255 | type: ':' builtin_field |
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256 | |
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257 | builtin_field: /textarea|text|password|file|checkbox|radio|select|hidden|static/ |
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258 | |
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259 | multi: '*' { 1 } |
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260 | |
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261 | other: '+' 'other' { 1 } |
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262 | |
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263 | default: '=' string { $item[2] } |
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264 | |
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265 | string: simple_multiword | quoted_string |
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266 | |
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267 | # for simple multiword values not involving punctuation |
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268 | simple_multiword: /\w/ <skip:''> /[\w\t ]*/ { $item[1] . $item[3] } |
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269 | |
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270 | # my attempt at a single-quoted, non-interpolating string |
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271 | # where the backslash can escape literal single quotes |
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272 | quoted_string: "'" <skip:''> /(\\'|[^'])*/ "'" |
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273 | { $item[3] =~ s/\\'/'/g; $item[3] } |
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274 | |
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275 | option_list: options | list_var |
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276 | |
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277 | options: '{' option(s /\s*,\s*/) '}' |
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278 | |
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279 | list_var: /@[A-Z_]+/ { $list_var = $item[1] } |
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280 | |
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281 | option: string display_text(?) |
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282 | { push @options, { $item[1] => $item{'display_text(?)'}[0] } } |
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283 | |
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284 | value: identifier |
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285 | |
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286 | display_text: bracket_block |
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287 | |
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288 | |
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289 | validate: '//' (optional_pattern | required_pattern) |
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290 | |
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291 | optional_pattern: var_name '?' { $required = 0; $item[1] } |
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292 | |
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293 | required_pattern: var_name { $required = 1; $item[1] } |
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294 | |
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295 | comment: '#' /.*/ |
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296 | blank: |
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297 | |
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298 | identifier: /\w+/ |
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299 | |
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300 | # skip unknown directives with a warning |
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301 | unknown_directive: /\!\S*/ /.*/ |
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302 | { warn "[Text::Formbuilder] Skipping unknown directive '$item[1]' at input text line $thisline\n"; } |
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303 | |
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304 | unknown_block_directive: /\!\S*/ var_name(?) block |
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305 | { warn "[Text::Formbuilder] Skipping unknown block directive '$item[1]' at input text line $thisline\n"; } |
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