{ #$::RD_TRACE = 1; my ( $context, # line or group @sections, # master data structure $section_head, $section_id, @lines, # lines in each section $title, $author, $description, %lists, %patterns, %subs, # validation subs @group, # current group %groups, # stored groups of fields $type, @options, $required, $list_var, $size, $maxlength, $rows, $cols, ); $context = 'line'; } form_spec: (list_def | description_def | validate_def | group_def | note | line)(s) { # grab the last section, if there is any if (@lines) { push @sections, { id => $section_id, head => $section_head, lines => [ @lines ], }; } $section_id = $item{identifier}; $section_head = $item[3]; @lines = (); $return = { title => $title, author => $author, description => $description, lists => \%lists, patterns => \%patterns, subs => \%subs, groups => \%groups, sections => \@sections, } } list_def: '!list' var_name (static_list | dynamic_list) { $lists{$item{var_name}} = [ @options ]; @options = () } static_list: '{' /\s*/ option(s /\s*,\s*/) /,?/ /\s*/ '}' dynamic_list: '&' { warn "[Text::FormBuilder] Dynamic lists have been removed from the formspec grammar"; } description_def: '!description' block { warn "[Text::FormBuilder] Description redefined at input text line $thisline\n" if defined $description; $description = $item{block}; } validate_def: '!validate' var_name { $subs{$item{var_name}} = eval "sub $item[3]" } group_def: '!group' { $context = 'group' } var_name '{' field_line(s) '}' { $context = 'line' } { #warn "$item{var_name} group; context $context\n" $groups{$item{var_name}} = [ @group ]; @group = (); } note: '!note' block { push @lines, [ 'note', $item{block} ]; } #TODO: allow \ escape for [] {} in these blocks # curly-brace delimited block, that can contain properly # nested curly braces, along with any other characters # inner blocks return with the '{...}' so that nested # blocks get the braces treated as literals block: '{' block_content(s) '}' { join('', @{ $item[3] }) } inner_block: '{' block_content(s) '}' { '{' . join('', @{ $item[3] }) . '}' } block_content: /[^\{\}]+?/ | inner_block # square brace delimited block, that can contain properly # nested square brackets, along with any other characters # inner bracket blocks return with the '[...]' so that nested # blocks get the braces treated as literals bracket_block: '[' bracket_block_content(s) ']' { join('', @{ $item[3] }) } inner_bracket_block: '[' bracket_block_content(s) ']' { '[' . join('', @{ $item[3] }) . ']'; } bracket_block_content: /[^\[\]]+?/ | inner_bracket_block # field lines are the subset of lines that are allowed in a !group directive field_line: ( field | comment | blank ) "\n" line: ( title | author | pattern_def | section_head | heading | group_field | field_group | unknown_directive | field | comment | blank ) "\n" title: '!title' /.*/ { warn "[Text::FormBuilder] Title redefined at input text line $thisline\n" if defined $title; $title = $item[2]; } author: '!author' /.*/ { warn "[Text::FormBuilder] Author redefined at input text line $thisline\n" if defined $author; $author = $item[2]; } pattern_def: '!pattern' var_name pattern { $patterns{$item{var_name}} = $item{pattern} } pattern: /.*/ section_head: '!section' identifier /.*/ { #warn "starting section $item{identifier}\n"; #warn " with heading $item[3]\n" if $item[3]; if (@lines) { push @sections, { id => $section_id, head => $section_head, lines => [ @lines ], }; } $section_id = $item{identifier}; $section_head = $item[3]; @lines = (); } heading: '!head' /.*/ { push @lines, [ 'head', $item[2] ] } group_field: '!field' group_name name label(?) { push @lines, [ 'group', { name => $item{name}, label => $item{'label(?)'}[0], group => $item{group_name} } ]; } group_name: /%[A-Z_]+/ field_group: name label(?) hint(?) group_type comment(?) { warn "[$thisline] comment = $item{'hint(?)'}[0]\n" if $item{'hint(?)'}[0]; #warn "[$thisline] field $item{name} is $item{group_type}\n"; push @lines, [ 'group', { name => $item{name}, label => $item{'label(?)'}[0], comment => $item{'hint(?)'}[0], group => $item{group_type}, } ]; } group_type: ':' var_name # this is the real heart of the thing field: name field_size(?) growable(?) label(?) hint(?) type(?) other(?) default(?) option_list(?) validate(?) comment(?) { my $field = { name => $item{name}, growable => $item{'growable(?)'}[0], label => $item{'label(?)'}[0], comment => $item{'hint(?)'}[0], type => $item{'type(?)'}[0], other => $item{'other(?)'}[0], value => $item{'default(?)'}[0], list => $list_var, validate => $item{'validate(?)'}[0], required => $required, }; $$field{options} = [ @options ] if @options; $$field{rows} = $rows if defined $rows; $$field{cols} = $cols if defined $cols; $$field{size} = $size if defined $size; $$field{maxlength} = $maxlength if defined $maxlength; #warn "[$thisline] field $item{name}; context $context\n"; if ($context eq 'group') { push @group, $field; } else { push @lines, [ 'field', $field ]; } $type = undef; $required = undef; $list_var = undef; $size = undef; $rows = undef; $cols = undef; $maxlength = undef; @options = (); $field; } name: identifier var_name: /[A-Z_]+/ field_size: '[' ( row_col | size ) ']' size: /\d+/ bang(?) { $maxlength = $item[1] if $item[2][0]; $size = $item[1] } bang: '!' row_col: /\d+/ /,\s*/ /\d+/ { $rows = $item[1]; $cols = $item[3] } growable: '*' limit(?) { $item{'limit(?)'}[0] || 1 } limit: /\d+/ label: '|' (simple_multiword | quoted_string) { $item[2] } hint: bracket_block type: ':' builtin_field builtin_field: /textarea|text|password|file|checkbox|radio|select|hidden|static/ other: '+' 'other' { 1 } default: '=' (simple_multiword | quoted_string) { $item[2] } # for simple multiword values not involving punctuation simple_multiword: /\w[\w\t ]*/ { $item[2] } # my attempt at a single-quoted, non-interpolating string # where the backslash can escape literal single quotes quoted_string: "'" /(\\'|[^'])*/ "'" { $item[3] =~ s/\\'/'/g; $item[3] } option_list: options | list_var options: '{' option(s /,/) '}' list_var: /@[A-Z_]+/ { $list_var = $item[1] } option: (simple_multiword | quoted_string) display_text(?) { push @options, { $item[1] => $item{'display_text(?)'}[0] } } value: identifier display_text: bracket_block validate: '//' (optional_pattern | required_pattern) optional_pattern: var_name '?' { $required = 0; $item[1] } required_pattern: var_name { $required = 1; $item[1] } comment: '#' /.*/ blank: identifier: /\w+/ # skip unknown directives with a warning unknown_directive: /\!\S*/ /.*/ { warn "[Text::Formbuilder] Skipping unknown directive '$item[1]' at input text line $thisline\n"; }