1CommonMark::Node(3) User Contributed Perl Documentation CommonMark::Node(3)
2
6 CommonMark::Node - Node of the CommonMark parse tree
7
9 my $html = $node->render(format => 'html');
10 my $header = $doc->first_child;
12 my $level = $header->get_header_level;
13 my $paragraph = $header->next;
14 my $link = CommonMark::Node->new(CommonMark::NODE_LINK);
16 $link->set_url('http://example.com/');
17 my $text = CommonMark::Node->new(CommonMark::NODE_TEXT);
18 $text->set_literal('link text');
19 $link->append_child($link_text);
20 $paragraph->append_child($link);
21 $doc->render_html;
23
25 "CommonMark::Node" represents a node of the parse tree.
26 new
28 my $node = CommonMark::Node->new($type);
29 Creates a new node of type $type. See "Node types" for a list of types.
31 Note that the node creation functions provide a more powerful
32 interface.
33 Rendering
35 my $result = $node->render(
36 format => $string,
37 sourcepos => $bool, # Optional
38 hardbreaks => $bool, # Optional
39 nobreaks => $bool, # Optional
40 unsafe => $bool, # Optional
41 width => $int, # Optional
42 );
43 Convenience function to render documents. Supported formats are 'html',
45 'xml', 'man', 'commonmark', and 'latex'.
46 "sourcepos", "hardbreaks", "nobreaks", and "unsafe" enable the
48 respective render options.
49 "width" is passed to renderers that support it.
51 my $html = $node->render_html( [$options] )
53 my $xml = $node->render_xml( [$options] )
54 my $man = $node->render_man( [$options], [$width] )
55 my $md = $node->render_commonmark( [$options], [$width] )
56 my $latex = $node->render_latex( [$options], [$width] )
57 These methods render the contents of the node in the respective format.
59 $options is a bit field created by ORing the following constants:
61 CommonMark::OPT_DEFAULT => 0
63 CommonMark::OPT_SOURCEPOS
64 CommonMark::OPT_HARDBREAKS
65 CommonMark::OPT_UNSAFE
66 CommonMark::OPT_NOBREAKS
67 Render options can be imported from CommonMark with tag "opt".
69 use CommonMark qw(:opt);
71 $options may be omitted and defaults to "OPT_DEFAULT".
73 "SOURCEPOS" adds information about line numbers in the source file to
75 the XML and HTML formats.
76 "HARDBREAKS" translates "softbreak" nodes (typically corresponding to
78 newlines in the input) to hard line breaks. This is only supported by
79 some renderers. The HTML renderer, for example, generates a "<br />"
80 instead of a newline character.
81 "NOBREAKS" translates "softbreak" nodes to spaces. Requires libcmark
83 0.25 or higher.
84 "UNSAFE" only affects the HTML renderer. It allows raw HTML blocks and
86 some dangerous links.
87 See the documentation of libcmark for a more detailed explanation of
89 the render options.
90 $width specifies the number of characters at which lines are broken. A
92 value of 0 disables line wrapping. The default is 0.
93 Accessors
95 # Integer values
96 my $int = $node->get_type;
98 my $int = $node->get_header_level;
99 my $int = $node->get_list_type;
100 my $int = $node->get_list_delim;
101 my $int = $node->get_list_start;
102 my $int = $node->get_list_tight;
103 my $int = $node->get_start_line;
104 my $int = $node->get_start_column;
105 my $int = $node->get_end_line;
106 my $int = $node->get_end_column;
107 $node->set_header_level($int);
109 $node->set_list_type($int);
110 $node->set_list_delim($int);
111 $node->set_list_start($int);
112 $node->set_list_tight($int);
113 # String values
115 my $string = $node->get_type_string;
117 my $string = $node->get_literal;
118 my $string = $node->get_title;
119 my $string = $node->get_url;
120 my $string = $node->get_fence_info;
121 my $string = $node->get_on_enter;
122 my $string = $node->get_on_exit;
123 $node->set_literal($string);
125 $node->set_title($string);
126 $node->set_url($string);
127 $node->set_fence_info($string);
128 $node->set_on_enter($string);
129 $node->set_on_exit($string);
130 Various accessors to get and set integer and string values of a node.
132 Not all values are supported by every type of node. Getters return 0 or
133 "undef" for unsupported values. Setters die on failure.
134 See "Constants" for a list of constants used for node types, list
136 types, and list delimiters.
137 Tree traversal
139 my $iterator = $node->iterator;
140 Creates a new CommonMark::Iterator to walk through the descendants of
142 the node.
143 my $next = $node->next;
145 my $prev = $node->previous;
146 my $parent = $node->parent;
147 my $child = $node->first_child;
148 my $child = $node->last_child;
149 These methods return the respective node in the tree structure.
151 Tree manipulation
153 $node->unlink;
154 $node->replace($other);
155 $node->insert_before($other);
156 $node->insert_after($other);
157 $node->prepend_child($other);
158 $node->append_child($other);
159 "unlink" removes a node and all its descendants from the tree.
161 "replace" replaces $node with $other, unlinking $node.
163 "insert_before" and "insert_after" insert the $other node before or
165 after $node. "append_child" and "prepend_child" append or prepend
166 $other to the children of $node. $other is unlinked before it is moved
167 to its new position.
168 These methods may die on failure, for example if the document structure
170 is violated.
171 Constants
173 Node types
174 CommonMark::NODE_NONE => 0
176 CommonMark::NODE_DOCUMENT
177 CommonMark::NODE_BLOCK_QUOTE
178 CommonMark::NODE_LIST
179 CommonMark::NODE_ITEM
180 CommonMark::NODE_CODE_BLOCK
181 CommonMark::NODE_HTML_BLOCK
182 CommonMark::NODE_CUSTOM_BLOCK
183 CommonMark::NODE_PARAGRAPH
184 CommonMark::NODE_HEADING
185 CommonMark::NODE_THEMATIC_BREAK
186 CommonMark::NODE_TEXT
187 CommonMark::NODE_SOFTBREAK
188 CommonMark::NODE_LINEBREAK
189 CommonMark::NODE_CODE
190 CommonMark::NODE_HTML_INLINE
191 CommonMark::NODE_CUSTOM_INLINE
192 CommonMark::NODE_EMPH
193 CommonMark::NODE_STRONG
194 CommonMark::NODE_LINK
195 CommonMark::NODE_IMAGE
196 Node types can be imported from CommonMark with tag "node".
198 use CommonMark qw(:node);
200 List types
202 CommonMark::NO_LIST => 0
204 CommonMark::BULLET_LIST
205 CommonMark::ORDERED_LIST
206 List types can be imported from CommonMark with tag "list".
208 use CommonMark qw(:list);
210 Delimiter types for ordered lists
212 CommonMark::NO_DELIM => 0
214 CommonMark::PERIOD_DELIM
215 CommonMark::PAREN_DELIM
216 Delimiter types can be imported from CommonMark with tag "delim".
218 use CommonMark qw(:delim);
220
222 This software is copyright (C) by Nick Wellnhofer.
223 This is free software; you can redistribute it and/or modify it under
225 the same terms as the Perl 5 programming language system itself.
226perl v5.34.0 2021-07-22 CommonMark::Node(3)