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efrain |
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<?php
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/**
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* Markdown Extra - A text-to-HTML conversion tool for web writers
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*
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* @package php-markdown
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* @author Michel Fortin <michel.fortin@michelf.com>
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* @copyright 2004-2022 Michel Fortin <https://michelf.com/projects/php-markdown/>
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* @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
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*/
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namespace Michelf;
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/**
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* Markdown Extra Parser Class
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*/
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class MarkdownExtra extends \Michelf\Markdown {
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/**
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* Configuration variables
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*/
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/**
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* Prefix for footnote ids.
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*/
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public string $fn_id_prefix = "";
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/**
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* Optional title attribute for footnote links.
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*/
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public string $fn_link_title = "";
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/**
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* Optional class attribute for footnote links and backlinks.
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*/
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public string $fn_link_class = "footnote-ref";
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public string $fn_backlink_class = "footnote-backref";
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/**
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* Content to be displayed within footnote backlinks. The default is '↩';
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* the U+FE0E on the end is a Unicode variant selector used to prevent iOS
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* from displaying the arrow character as an emoji.
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* Optionally use '^^' and '%%' to refer to the footnote number and
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* reference number respectively. {@see parseFootnotePlaceholders()}
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*/
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public string $fn_backlink_html = '↩︎';
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/**
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* Optional title and aria-label attributes for footnote backlinks for
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* added accessibility (to ensure backlink uniqueness).
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* Use '^^' and '%%' to refer to the footnote number and reference number
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* respectively. {@see parseFootnotePlaceholders()}
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*/
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public string $fn_backlink_title = "";
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public string $fn_backlink_label = "";
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/**
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* Class name for table cell alignment (%% replaced left/center/right)
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* For instance: 'go-%%' becomes 'go-left' or 'go-right' or 'go-center'
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* If empty, the align attribute is used instead of a class name.
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*/
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public string $table_align_class_tmpl = '';
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/**
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* Optional class prefix for fenced code block.
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*/
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public string $code_class_prefix = "";
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/**
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* Class attribute for code blocks goes on the `code` tag;
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* setting this to true will put attributes on the `pre` tag instead.
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*/
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public bool $code_attr_on_pre = false;
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/**
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* Predefined abbreviations.
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*/
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public array $predef_abbr = array();
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/**
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* Only convert atx-style headers if there's a space between the header and #
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*/
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public bool $hashtag_protection = false;
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/**
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* Determines whether footnotes should be appended to the end of the document.
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* If true, footnote html can be retrieved from $this->footnotes_assembled.
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*/
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public bool $omit_footnotes = false;
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/**
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* After parsing, the HTML for the list of footnotes appears here.
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* This is available only if $omit_footnotes == true.
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*
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* Note: when placing the content of `footnotes_assembled` on the page,
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* consider adding the attribute `role="doc-endnotes"` to the `div` or
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* `section` that will enclose the list of footnotes so they are
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* reachable to accessibility tools the same way they would be with the
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* default HTML output.
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*/
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public ?string $footnotes_assembled = null;
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/**
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* Parser implementation
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*/
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/**
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* Constructor function. Initialize the parser object.
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* @return void
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*/
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public function __construct() {
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// Add extra escapable characters before parent constructor
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// initialize the table.
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$this->escape_chars .= ':|';
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// Insert extra document, block, and span transformations.
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// Parent constructor will do the sorting.
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$this->document_gamut += array(
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"doFencedCodeBlocks" => 5,
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"stripFootnotes" => 15,
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"stripAbbreviations" => 25,
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"appendFootnotes" => 50,
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);
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$this->block_gamut += array(
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"doFencedCodeBlocks" => 5,
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"doTables" => 15,
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"doDefLists" => 45,
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);
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$this->span_gamut += array(
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"doFootnotes" => 5,
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"doAbbreviations" => 70,
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);
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$this->enhanced_ordered_list = true;
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parent::__construct();
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}
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/**
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* Extra variables used during extra transformations.
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*/
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protected array $footnotes = array();
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protected array $footnotes_ordered = array();
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protected array $footnotes_ref_count = array();
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protected array $footnotes_numbers = array();
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protected array $abbr_desciptions = array();
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protected string $abbr_word_re = '';
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/**
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* Give the current footnote number.
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*/
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protected int $footnote_counter = 1;
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/**
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* Ref attribute for links
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*/
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protected array $ref_attr = array();
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/**
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* Setting up Extra-specific variables.
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*/
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protected function setup() {
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parent::setup();
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$this->footnotes = array();
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$this->footnotes_ordered = array();
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$this->footnotes_ref_count = array();
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$this->footnotes_numbers = array();
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$this->abbr_desciptions = array();
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$this->abbr_word_re = '';
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$this->footnote_counter = 1;
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$this->footnotes_assembled = null;
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foreach ($this->predef_abbr as $abbr_word => $abbr_desc) {
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if ($this->abbr_word_re)
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$this->abbr_word_re .= '|';
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$this->abbr_word_re .= preg_quote($abbr_word);
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$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
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}
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}
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/**
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* Clearing Extra-specific variables.
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*/
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protected function teardown() {
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$this->footnotes = array();
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$this->footnotes_ordered = array();
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$this->footnotes_ref_count = array();
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$this->footnotes_numbers = array();
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$this->abbr_desciptions = array();
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$this->abbr_word_re = '';
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if ( ! $this->omit_footnotes )
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$this->footnotes_assembled = null;
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parent::teardown();
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}
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/**
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* Extra attribute parser
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*/
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/**
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* Expression to use to catch attributes (includes the braces)
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*/
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protected string $id_class_attr_catch_re = '\{((?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,})[ ]*\}';
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/**
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* Expression to use when parsing in a context when no capture is desired
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*/
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protected string $id_class_attr_nocatch_re = '\{(?>[ ]*[#.a-z][-_:a-zA-Z0-9=]+){1,}[ ]*\}';
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/**
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* Parse attributes caught by the $this->id_class_attr_catch_re expression
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* and return the HTML-formatted list of attributes.
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*
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* Currently supported attributes are .class and #id.
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*
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* In addition, this method also supports supplying a default Id value,
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* which will be used to populate the id attribute in case it was not
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* overridden.
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* @param string $tag_name
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* @param string $attr
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* @param mixed $defaultIdValue
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* @param array $classes
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* @return string
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*/
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protected function doExtraAttributes($tag_name, $attr, $defaultIdValue = null, $classes = array()) {
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if (empty($attr) && !$defaultIdValue && empty($classes)) {
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return "";
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}
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// Split on components
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preg_match_all('/[#.a-z][-_:a-zA-Z0-9=]+/', $attr, $matches);
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$elements = $matches[0];
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// Handle classes and IDs (only first ID taken into account)
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$attributes = array();
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$id = false;
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foreach ($elements as $element) {
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if ($element[0] === '.') {
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$classes[] = substr($element, 1);
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} else if ($element[0] === '#') {
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if ($id === false) $id = substr($element, 1);
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} else if (strpos($element, '=') > 0) {
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$parts = explode('=', $element, 2);
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$attributes[] = $parts[0] . '="' . $parts[1] . '"';
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}
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}
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if ($id === false || $id === '') {
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$id = $defaultIdValue;
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}
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// Compose attributes as string
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$attr_str = "";
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if (!empty($id)) {
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$attr_str .= ' id="'.$this->encodeAttribute($id) .'"';
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}
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if (!empty($classes)) {
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$attr_str .= ' class="'. implode(" ", $classes) . '"';
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}
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if (!$this->no_markup && !empty($attributes)) {
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$attr_str .= ' '.implode(" ", $attributes);
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}
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return $attr_str;
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}
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/**
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* Strips link definitions from text, stores the URLs and titles in
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* hash references.
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* @param string $text
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* @return string
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*/
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protected function stripLinkDefinitions($text) {
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$less_than_tab = $this->tab_width - 1;
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// Link defs are in the form: ^[id]: url "optional title"
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$text = preg_replace_callback('{
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^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?: # id = $1
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[ ]*
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\n? # maybe *one* newline
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[ ]*
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(?:
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<(.+?)> # url = $2
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(\S+?) # url = $3
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)
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[ ]*
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\n? # maybe one newline
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[ ]*
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(?:
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(?<=\s) # lookbehind for whitespace
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["(]
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(.*?) # title = $4
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[")]
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[ ]*
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)? # title is optional
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(?:[ ]* '.$this->id_class_attr_catch_re.' )? # $5 = extra id & class attr
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(?:\n+|\Z)
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}xm',
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array($this, '_stripLinkDefinitions_callback'),
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$text);
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return $text;
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}
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/**
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* Strip link definition callback
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* @param array $matches
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* @return string
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*/
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protected function _stripLinkDefinitions_callback($matches) {
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$link_id = strtolower($matches[1]);
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$url = $matches[2] == '' ? $matches[3] : $matches[2];
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$this->urls[$link_id] = $url;
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$this->titles[$link_id] =& $matches[4];
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$this->ref_attr[$link_id] = $this->doExtraAttributes("", $dummy =& $matches[5]);
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return ''; // String that will replace the block
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}
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/**
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* HTML block parser
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*/
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/**
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* Tags that are always treated as block tags
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*/
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protected string $block_tags_re = 'p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|figure|details|summary';
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/**
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* Tags treated as block tags only if the opening tag is alone on its line
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*/
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protected string $context_block_tags_re = 'script|noscript|style|ins|del|iframe|object|source|track|param|math|svg|canvas|audio|video';
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/**
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* Tags where markdown="1" default to span mode:
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*/
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protected string $contain_span_tags_re = 'p|h[1-6]|li|dd|dt|td|th|legend|address';
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/**
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* Tags which must not have their contents modified, no matter where
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* they appear
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*/
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protected string $clean_tags_re = 'script|style|math|svg';
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/**
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* Tags that do not need to be closed.
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*/
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protected string $auto_close_tags_re = 'hr|img|param|source|track';
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/**
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* Hashify HTML Blocks and "clean tags".
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*
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* We only want to do this for block-level HTML tags, such as headers,
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* lists, and tables. That's because we still want to wrap <p>s around
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* "paragraphs" that are wrapped in non-block-level tags, such as anchors,
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* phrase emphasis, and spans. The list of tags we're looking for is
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* hard-coded.
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*
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* This works by calling _HashHTMLBlocks_InMarkdown, which then calls
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* _HashHTMLBlocks_InHTML when it encounter block tags. When the markdown="1"
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* attribute is found within a tag, _HashHTMLBlocks_InHTML calls back
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* _HashHTMLBlocks_InMarkdown to handle the Markdown syntax within the tag.
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* These two functions are calling each other. It's recursive!
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* @param string $text
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* @return string
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*/
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366 |
protected function hashHTMLBlocks($text) {
|
|
|
367 |
if ($this->no_markup) {
|
|
|
368 |
return $text;
|
|
|
369 |
}
|
|
|
370 |
|
|
|
371 |
// Call the HTML-in-Markdown hasher.
|
|
|
372 |
list($text, ) = $this->_hashHTMLBlocks_inMarkdown($text);
|
|
|
373 |
|
|
|
374 |
return $text;
|
|
|
375 |
}
|
|
|
376 |
|
|
|
377 |
/**
|
|
|
378 |
* Parse markdown text, calling _HashHTMLBlocks_InHTML for block tags.
|
|
|
379 |
*
|
|
|
380 |
* * $indent is the number of space to be ignored when checking for code
|
|
|
381 |
* blocks. This is important because if we don't take the indent into
|
|
|
382 |
* account, something like this (which looks right) won't work as expected:
|
|
|
383 |
*
|
|
|
384 |
* <div>
|
|
|
385 |
* <div markdown="1">
|
|
|
386 |
* Hello World. <-- Is this a Markdown code block or text?
|
|
|
387 |
* </div> <-- Is this a Markdown code block or a real tag?
|
|
|
388 |
* <div>
|
|
|
389 |
*
|
|
|
390 |
* If you don't like this, just don't indent the tag on which
|
|
|
391 |
* you apply the markdown="1" attribute.
|
|
|
392 |
*
|
|
|
393 |
* * If $enclosing_tag_re is not empty, stops at the first unmatched closing
|
|
|
394 |
* tag with that name. Nested tags supported.
|
|
|
395 |
*
|
|
|
396 |
* * If $span is true, text inside must treated as span. So any double
|
|
|
397 |
* newline will be replaced by a single newline so that it does not create
|
|
|
398 |
* paragraphs.
|
|
|
399 |
*
|
|
|
400 |
* Returns an array of that form: ( processed text , remaining text )
|
|
|
401 |
*
|
|
|
402 |
* @param string $text
|
|
|
403 |
* @param integer $indent
|
|
|
404 |
* @param string $enclosing_tag_re
|
|
|
405 |
* @param boolean $span
|
|
|
406 |
* @return array
|
|
|
407 |
*/
|
|
|
408 |
protected function _hashHTMLBlocks_inMarkdown($text, $indent = 0,
|
|
|
409 |
$enclosing_tag_re = '', $span = false)
|
|
|
410 |
{
|
|
|
411 |
|
|
|
412 |
if ($text === '') return array('', '');
|
|
|
413 |
|
|
|
414 |
// Regex to check for the presense of newlines around a block tag.
|
|
|
415 |
$newline_before_re = '/(?:^\n?|\n\n)*$/';
|
|
|
416 |
$newline_after_re =
|
|
|
417 |
'{
|
|
|
418 |
^ # Start of text following the tag.
|
|
|
419 |
(?>[ ]*<!--.*?-->)? # Optional comment.
|
|
|
420 |
[ ]*\n # Must be followed by newline.
|
|
|
421 |
}xs';
|
|
|
422 |
|
|
|
423 |
// Regex to match any tag.
|
|
|
424 |
$block_tag_re =
|
|
|
425 |
'{
|
|
|
426 |
( # $2: Capture whole tag.
|
|
|
427 |
</? # Any opening or closing tag.
|
|
|
428 |
(?> # Tag name.
|
|
|
429 |
' . $this->block_tags_re . ' |
|
|
|
430 |
' . $this->context_block_tags_re . ' |
|
|
|
431 |
' . $this->clean_tags_re . ' |
|
|
|
432 |
(?!\s)'.$enclosing_tag_re . '
|
|
|
433 |
)
|
|
|
434 |
(?:
|
|
|
435 |
(?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name.
|
|
|
436 |
(?>
|
|
|
437 |
".*?" | # Double quotes (can contain `>`)
|
|
|
438 |
\'.*?\' | # Single quotes (can contain `>`)
|
|
|
439 |
.+? # Anything but quotes and `>`.
|
|
|
440 |
)*?
|
|
|
441 |
)?
|
|
|
442 |
> # End of tag.
|
|
|
443 |
|
|
|
|
444 |
<!-- .*? --> # HTML Comment
|
|
|
445 |
|
|
|
|
446 |
<\?.*?\?> | <%.*?%> # Processing instruction
|
|
|
447 |
|
|
|
|
448 |
<!\[CDATA\[.*?\]\]> # CData Block
|
|
|
449 |
' . ( !$span ? ' # If not in span.
|
|
|
450 |
|
|
|
|
451 |
# Indented code block
|
|
|
452 |
(?: ^[ ]*\n | ^ | \n[ ]*\n )
|
|
|
453 |
[ ]{' . ($indent + 4) . '}[^\n]* \n
|
|
|
454 |
(?>
|
|
|
455 |
(?: [ ]{' . ($indent + 4) . '}[^\n]* | [ ]* ) \n
|
|
|
456 |
)*
|
|
|
457 |
|
|
|
|
458 |
# Fenced code block marker
|
|
|
459 |
(?<= ^ | \n )
|
|
|
460 |
[ ]{0,' . ($indent + 3) . '}(?:~{3,}|`{3,})
|
|
|
461 |
[ ]*
|
|
|
462 |
(?: \.?[-_:a-zA-Z0-9]+ )? # standalone class name
|
|
|
463 |
[ ]*
|
|
|
464 |
(?: ' . $this->id_class_attr_nocatch_re . ' )? # extra attributes
|
|
|
465 |
[ ]*
|
|
|
466 |
(?= \n )
|
|
|
467 |
' : '' ) . ' # End (if not is span).
|
|
|
468 |
|
|
|
|
469 |
# Code span marker
|
|
|
470 |
# Note, this regex needs to go after backtick fenced
|
|
|
471 |
# code blocks but it should also be kept outside of the
|
|
|
472 |
# "if not in span" condition adding backticks to the parser
|
|
|
473 |
`+
|
|
|
474 |
)
|
|
|
475 |
}xs';
|
|
|
476 |
|
|
|
477 |
|
|
|
478 |
$depth = 0; // Current depth inside the tag tree.
|
|
|
479 |
$parsed = ""; // Parsed text that will be returned.
|
|
|
480 |
|
|
|
481 |
// Loop through every tag until we find the closing tag of the parent
|
|
|
482 |
// or loop until reaching the end of text if no parent tag specified.
|
|
|
483 |
do {
|
|
|
484 |
// Split the text using the first $tag_match pattern found.
|
|
|
485 |
// Text before pattern will be first in the array, text after
|
|
|
486 |
// pattern will be at the end, and between will be any catches made
|
|
|
487 |
// by the pattern.
|
|
|
488 |
$parts = preg_split($block_tag_re, $text, 2,
|
|
|
489 |
PREG_SPLIT_DELIM_CAPTURE);
|
|
|
490 |
|
|
|
491 |
// If in Markdown span mode, add a empty-string span-level hash
|
|
|
492 |
// after each newline to prevent triggering any block element.
|
|
|
493 |
if ($span) {
|
|
|
494 |
$void = $this->hashPart("", ':');
|
|
|
495 |
$newline = "\n$void";
|
|
|
496 |
$parts[0] = $void . str_replace("\n", $newline, $parts[0]) . $void;
|
|
|
497 |
}
|
|
|
498 |
|
|
|
499 |
$parsed .= $parts[0]; // Text before current tag.
|
|
|
500 |
|
|
|
501 |
// If end of $text has been reached. Stop loop.
|
|
|
502 |
if (count($parts) < 3) {
|
|
|
503 |
$text = "";
|
|
|
504 |
break;
|
|
|
505 |
}
|
|
|
506 |
|
|
|
507 |
$tag = $parts[1]; // Tag to handle.
|
|
|
508 |
$text = $parts[2]; // Remaining text after current tag.
|
|
|
509 |
|
|
|
510 |
// Check for: Fenced code block marker.
|
|
|
511 |
// Note: need to recheck the whole tag to disambiguate backtick
|
|
|
512 |
// fences from code spans
|
|
|
513 |
if (preg_match('{^\n?([ ]{0,' . ($indent + 3) . '})(~{3,}|`{3,})[ ]*(?:\.?[-_:a-zA-Z0-9]+)?[ ]*(?:' . $this->id_class_attr_nocatch_re . ')?[ ]*\n?$}', $tag, $capture)) {
|
|
|
514 |
// Fenced code block marker: find matching end marker.
|
|
|
515 |
$fence_indent = strlen($capture[1]); // use captured indent in re
|
|
|
516 |
$fence_re = $capture[2]; // use captured fence in re
|
|
|
517 |
if (preg_match('{^(?>.*\n)*?[ ]{' . ($fence_indent) . '}' . $fence_re . '[ ]*(?:\n|$)}', $text,
|
|
|
518 |
$matches))
|
|
|
519 |
{
|
|
|
520 |
// End marker found: pass text unchanged until marker.
|
|
|
521 |
$parsed .= $tag . $matches[0];
|
|
|
522 |
$text = substr($text, strlen($matches[0]));
|
|
|
523 |
}
|
|
|
524 |
else {
|
|
|
525 |
// No end marker: just skip it.
|
|
|
526 |
$parsed .= $tag;
|
|
|
527 |
}
|
|
|
528 |
}
|
|
|
529 |
// Check for: Indented code block.
|
|
|
530 |
else if ($tag[0] === "\n" || $tag[0] === " ") {
|
|
|
531 |
// Indented code block: pass it unchanged, will be handled
|
|
|
532 |
// later.
|
|
|
533 |
$parsed .= $tag;
|
|
|
534 |
}
|
|
|
535 |
// Check for: Code span marker
|
|
|
536 |
// Note: need to check this after backtick fenced code blocks
|
|
|
537 |
else if ($tag[0] === "`") {
|
|
|
538 |
// Find corresponding end marker.
|
|
|
539 |
$tag_re = preg_quote($tag);
|
|
|
540 |
if (preg_match('{^(?>.+?|\n(?!\n))*?(?<!`)' . $tag_re . '(?!`)}',
|
|
|
541 |
$text, $matches))
|
|
|
542 |
{
|
|
|
543 |
// End marker found: pass text unchanged until marker.
|
|
|
544 |
$parsed .= $tag . $matches[0];
|
|
|
545 |
$text = substr($text, strlen($matches[0]));
|
|
|
546 |
}
|
|
|
547 |
else {
|
|
|
548 |
// Unmatched marker: just skip it.
|
|
|
549 |
$parsed .= $tag;
|
|
|
550 |
}
|
|
|
551 |
}
|
|
|
552 |
// Check for: Opening Block level tag or
|
|
|
553 |
// Opening Context Block tag (like ins and del)
|
|
|
554 |
// used as a block tag (tag is alone on it's line).
|
|
|
555 |
else if (preg_match('{^<(?:' . $this->block_tags_re . ')\b}', $tag) ||
|
|
|
556 |
( preg_match('{^<(?:' . $this->context_block_tags_re . ')\b}', $tag) &&
|
|
|
557 |
preg_match($newline_before_re, $parsed) &&
|
|
|
558 |
preg_match($newline_after_re, $text) )
|
|
|
559 |
)
|
|
|
560 |
{
|
|
|
561 |
// Need to parse tag and following text using the HTML parser.
|
|
|
562 |
list($block_text, $text) =
|
|
|
563 |
$this->_hashHTMLBlocks_inHTML($tag . $text, "hashBlock", true);
|
|
|
564 |
|
|
|
565 |
// Make sure it stays outside of any paragraph by adding newlines.
|
|
|
566 |
$parsed .= "\n\n$block_text\n\n";
|
|
|
567 |
}
|
|
|
568 |
// Check for: Clean tag (like script, math)
|
|
|
569 |
// HTML Comments, processing instructions.
|
|
|
570 |
else if (preg_match('{^<(?:' . $this->clean_tags_re . ')\b}', $tag) ||
|
|
|
571 |
$tag[1] === '!' || $tag[1] === '?')
|
|
|
572 |
{
|
|
|
573 |
// Need to parse tag and following text using the HTML parser.
|
|
|
574 |
// (don't check for markdown attribute)
|
|
|
575 |
list($block_text, $text) =
|
|
|
576 |
$this->_hashHTMLBlocks_inHTML($tag . $text, "hashClean", false);
|
|
|
577 |
|
|
|
578 |
$parsed .= $block_text;
|
|
|
579 |
}
|
|
|
580 |
// Check for: Tag with same name as enclosing tag.
|
|
|
581 |
else if ($enclosing_tag_re !== '' &&
|
|
|
582 |
// Same name as enclosing tag.
|
|
|
583 |
preg_match('{^</?(?:' . $enclosing_tag_re . ')\b}', $tag))
|
|
|
584 |
{
|
|
|
585 |
// Increase/decrease nested tag count.
|
|
|
586 |
if ($tag[1] === '/') {
|
|
|
587 |
$depth--;
|
|
|
588 |
} else if ($tag[strlen($tag)-2] !== '/') {
|
|
|
589 |
$depth++;
|
|
|
590 |
}
|
|
|
591 |
|
|
|
592 |
if ($depth < 0) {
|
|
|
593 |
// Going out of parent element. Clean up and break so we
|
|
|
594 |
// return to the calling function.
|
|
|
595 |
$text = $tag . $text;
|
|
|
596 |
break;
|
|
|
597 |
}
|
|
|
598 |
|
|
|
599 |
$parsed .= $tag;
|
|
|
600 |
}
|
|
|
601 |
else {
|
|
|
602 |
$parsed .= $tag;
|
|
|
603 |
}
|
|
|
604 |
// @phpstan-ignore-next-line
|
|
|
605 |
} while ($depth >= 0);
|
|
|
606 |
|
|
|
607 |
return array($parsed, $text);
|
|
|
608 |
}
|
|
|
609 |
|
|
|
610 |
/**
|
|
|
611 |
* Parse HTML, calling _HashHTMLBlocks_InMarkdown for block tags.
|
|
|
612 |
*
|
|
|
613 |
* * Calls $hash_method to convert any blocks.
|
|
|
614 |
* * Stops when the first opening tag closes.
|
|
|
615 |
* * $md_attr indicate if the use of the `markdown="1"` attribute is allowed.
|
|
|
616 |
* (it is not inside clean tags)
|
|
|
617 |
*
|
|
|
618 |
* Returns an array of that form: ( processed text , remaining text )
|
|
|
619 |
* @param string $text
|
|
|
620 |
* @param string $hash_method
|
|
|
621 |
* @param bool $md_attr Handle `markdown="1"` attribute
|
|
|
622 |
* @return array
|
|
|
623 |
*/
|
|
|
624 |
protected function _hashHTMLBlocks_inHTML($text, $hash_method, $md_attr) {
|
|
|
625 |
if ($text === '') return array('', '');
|
|
|
626 |
|
|
|
627 |
// Regex to match `markdown` attribute inside of a tag.
|
|
|
628 |
$markdown_attr_re = '
|
|
|
629 |
{
|
|
|
630 |
\s* # Eat whitespace before the `markdown` attribute
|
|
|
631 |
markdown
|
|
|
632 |
\s*=\s*
|
|
|
633 |
(?>
|
|
|
634 |
(["\']) # $1: quote delimiter
|
|
|
635 |
(.*?) # $2: attribute value
|
|
|
636 |
\1 # matching delimiter
|
|
|
637 |
|
|
|
|
638 |
([^\s>]*) # $3: unquoted attribute value
|
|
|
639 |
)
|
|
|
640 |
() # $4: make $3 always defined (avoid warnings)
|
|
|
641 |
}xs';
|
|
|
642 |
|
|
|
643 |
// Regex to match any tag.
|
|
|
644 |
$tag_re = '{
|
|
|
645 |
( # $2: Capture whole tag.
|
|
|
646 |
</? # Any opening or closing tag.
|
|
|
647 |
[\w:$]+ # Tag name.
|
|
|
648 |
(?:
|
|
|
649 |
(?=[\s"\'/a-zA-Z0-9]) # Allowed characters after tag name.
|
|
|
650 |
(?>
|
|
|
651 |
".*?" | # Double quotes (can contain `>`)
|
|
|
652 |
\'.*?\' | # Single quotes (can contain `>`)
|
|
|
653 |
.+? # Anything but quotes and `>`.
|
|
|
654 |
)*?
|
|
|
655 |
)?
|
|
|
656 |
> # End of tag.
|
|
|
657 |
|
|
|
|
658 |
<!-- .*? --> # HTML Comment
|
|
|
659 |
|
|
|
|
660 |
<\?.*?\?> | <%.*?%> # Processing instruction
|
|
|
661 |
|
|
|
|
662 |
<!\[CDATA\[.*?\]\]> # CData Block
|
|
|
663 |
)
|
|
|
664 |
}xs';
|
|
|
665 |
|
|
|
666 |
$original_text = $text; // Save original text in case of faliure.
|
|
|
667 |
|
|
|
668 |
$depth = 0; // Current depth inside the tag tree.
|
|
|
669 |
$block_text = ""; // Temporary text holder for current text.
|
|
|
670 |
$parsed = ""; // Parsed text that will be returned.
|
|
|
671 |
$base_tag_name_re = '';
|
|
|
672 |
|
|
|
673 |
// Get the name of the starting tag.
|
|
|
674 |
// (This pattern makes $base_tag_name_re safe without quoting.)
|
|
|
675 |
if (preg_match('/^<([\w:$]*)\b/', $text, $matches))
|
|
|
676 |
$base_tag_name_re = $matches[1];
|
|
|
677 |
|
|
|
678 |
// Loop through every tag until we find the corresponding closing tag.
|
|
|
679 |
do {
|
|
|
680 |
// Split the text using the first $tag_match pattern found.
|
|
|
681 |
// Text before pattern will be first in the array, text after
|
|
|
682 |
// pattern will be at the end, and between will be any catches made
|
|
|
683 |
// by the pattern.
|
|
|
684 |
$parts = preg_split($tag_re, $text, 2, PREG_SPLIT_DELIM_CAPTURE);
|
|
|
685 |
|
|
|
686 |
if ($parts === false || count($parts) < 3) {
|
|
|
687 |
// End of $text reached with unbalenced tag(s).
|
|
|
688 |
// In that case, we return original text unchanged and pass the
|
|
|
689 |
// first character as filtered to prevent an infinite loop in the
|
|
|
690 |
// parent function.
|
|
|
691 |
return array($original_text[0], substr($original_text, 1));
|
|
|
692 |
}
|
|
|
693 |
|
|
|
694 |
$block_text .= $parts[0]; // Text before current tag.
|
|
|
695 |
$tag = $parts[1]; // Tag to handle.
|
|
|
696 |
$text = $parts[2]; // Remaining text after current tag.
|
|
|
697 |
|
|
|
698 |
// Check for: Auto-close tag (like <hr/>)
|
|
|
699 |
// Comments and Processing Instructions.
|
|
|
700 |
if (preg_match('{^</?(?:' . $this->auto_close_tags_re . ')\b}', $tag) ||
|
|
|
701 |
$tag[1] === '!' || $tag[1] === '?')
|
|
|
702 |
{
|
|
|
703 |
// Just add the tag to the block as if it was text.
|
|
|
704 |
$block_text .= $tag;
|
|
|
705 |
}
|
|
|
706 |
else {
|
|
|
707 |
// Increase/decrease nested tag count. Only do so if
|
|
|
708 |
// the tag's name match base tag's.
|
|
|
709 |
if (preg_match('{^</?' . $base_tag_name_re . '\b}', $tag)) {
|
|
|
710 |
if ($tag[1] === '/') {
|
|
|
711 |
$depth--;
|
|
|
712 |
} else if ($tag[strlen($tag)-2] !== '/') {
|
|
|
713 |
$depth++;
|
|
|
714 |
}
|
|
|
715 |
}
|
|
|
716 |
|
|
|
717 |
// Check for `markdown="1"` attribute and handle it.
|
|
|
718 |
if ($md_attr &&
|
|
|
719 |
preg_match($markdown_attr_re, $tag, $attr_m) &&
|
|
|
720 |
preg_match('/^1|block|span$/', $attr_m[2] . $attr_m[3]))
|
|
|
721 |
{
|
|
|
722 |
// Remove `markdown` attribute from opening tag.
|
|
|
723 |
$tag = preg_replace($markdown_attr_re, '', $tag);
|
|
|
724 |
|
|
|
725 |
// Check if text inside this tag must be parsed in span mode.
|
|
|
726 |
$mode = $attr_m[2] . $attr_m[3];
|
|
|
727 |
$span_mode = $mode === 'span' || ($mode !== 'block' &&
|
|
|
728 |
preg_match('{^<(?:' . $this->contain_span_tags_re . ')\b}', $tag));
|
|
|
729 |
|
|
|
730 |
// Calculate indent before tag.
|
|
|
731 |
if (preg_match('/(?:^|\n)( *?)(?! ).*?$/', $block_text, $matches)) {
|
|
|
732 |
$strlen = $this->utf8_strlen;
|
|
|
733 |
$indent = $strlen($matches[1], 'UTF-8');
|
|
|
734 |
} else {
|
|
|
735 |
$indent = 0;
|
|
|
736 |
}
|
|
|
737 |
|
|
|
738 |
// End preceding block with this tag.
|
|
|
739 |
$block_text .= $tag;
|
|
|
740 |
$parsed .= $this->$hash_method($block_text);
|
|
|
741 |
|
|
|
742 |
// Get enclosing tag name for the ParseMarkdown function.
|
|
|
743 |
// (This pattern makes $tag_name_re safe without quoting.)
|
|
|
744 |
preg_match('/^<([\w:$]*)\b/', $tag, $matches);
|
|
|
745 |
$tag_name_re = $matches[1];
|
|
|
746 |
|
|
|
747 |
// Parse the content using the HTML-in-Markdown parser.
|
|
|
748 |
list ($block_text, $text)
|
|
|
749 |
= $this->_hashHTMLBlocks_inMarkdown($text, $indent,
|
|
|
750 |
$tag_name_re, $span_mode);
|
|
|
751 |
|
|
|
752 |
// Outdent markdown text.
|
|
|
753 |
if ($indent > 0) {
|
|
|
754 |
$block_text = preg_replace("/^[ ]{1,$indent}/m", "",
|
|
|
755 |
$block_text);
|
|
|
756 |
}
|
|
|
757 |
|
|
|
758 |
// Append tag content to parsed text.
|
|
|
759 |
if (!$span_mode) {
|
|
|
760 |
$parsed .= "\n\n$block_text\n\n";
|
|
|
761 |
} else {
|
|
|
762 |
$parsed .= (string) $block_text;
|
|
|
763 |
}
|
|
|
764 |
|
|
|
765 |
// Start over with a new block.
|
|
|
766 |
$block_text = "";
|
|
|
767 |
}
|
|
|
768 |
else $block_text .= $tag;
|
|
|
769 |
}
|
|
|
770 |
|
|
|
771 |
} while ($depth > 0);
|
|
|
772 |
|
|
|
773 |
// Hash last block text that wasn't processed inside the loop.
|
|
|
774 |
$parsed .= $this->$hash_method($block_text);
|
|
|
775 |
|
|
|
776 |
return array($parsed, $text);
|
|
|
777 |
}
|
|
|
778 |
|
|
|
779 |
/**
|
|
|
780 |
* Called whenever a tag must be hashed when a function inserts a "clean" tag
|
|
|
781 |
* in $text, it passes through this function and is automaticaly escaped,
|
|
|
782 |
* blocking invalid nested overlap.
|
|
|
783 |
* @param string $text
|
|
|
784 |
* @return string
|
|
|
785 |
*/
|
|
|
786 |
protected function hashClean($text) {
|
|
|
787 |
return $this->hashPart($text, 'C');
|
|
|
788 |
}
|
|
|
789 |
|
|
|
790 |
/**
|
|
|
791 |
* Turn Markdown link shortcuts into XHTML <a> tags.
|
|
|
792 |
* @param string $text
|
|
|
793 |
* @return string
|
|
|
794 |
*/
|
|
|
795 |
protected function doAnchors($text) {
|
|
|
796 |
if ($this->in_anchor) {
|
|
|
797 |
return $text;
|
|
|
798 |
}
|
|
|
799 |
$this->in_anchor = true;
|
|
|
800 |
|
|
|
801 |
// First, handle reference-style links: [link text] [id]
|
|
|
802 |
$text = preg_replace_callback('{
|
|
|
803 |
( # wrap whole match in $1
|
|
|
804 |
\[
|
|
|
805 |
(' . $this->nested_brackets_re . ') # link text = $2
|
|
|
806 |
\]
|
|
|
807 |
|
|
|
808 |
[ ]? # one optional space
|
|
|
809 |
(?:\n[ ]*)? # one optional newline followed by spaces
|
|
|
810 |
|
|
|
811 |
\[
|
|
|
812 |
(.*?) # id = $3
|
|
|
813 |
\]
|
|
|
814 |
)
|
|
|
815 |
}xs',
|
|
|
816 |
array($this, '_doAnchors_reference_callback'), $text);
|
|
|
817 |
|
|
|
818 |
// Next, inline-style links: [link text](url "optional title")
|
|
|
819 |
$text = preg_replace_callback('{
|
|
|
820 |
( # wrap whole match in $1
|
|
|
821 |
\[
|
|
|
822 |
(' . $this->nested_brackets_re . ') # link text = $2
|
|
|
823 |
\]
|
|
|
824 |
\( # literal paren
|
|
|
825 |
[ \n]*
|
|
|
826 |
(?:
|
|
|
827 |
<(.+?)> # href = $3
|
|
|
828 |
|
|
|
|
829 |
(' . $this->nested_url_parenthesis_re . ') # href = $4
|
|
|
830 |
)
|
|
|
831 |
[ \n]*
|
|
|
832 |
( # $5
|
|
|
833 |
([\'"]) # quote char = $6
|
|
|
834 |
(.*?) # Title = $7
|
|
|
835 |
\6 # matching quote
|
|
|
836 |
[ \n]* # ignore any spaces/tabs between closing quote and )
|
|
|
837 |
)? # title is optional
|
|
|
838 |
\)
|
|
|
839 |
(?:[ ]? ' . $this->id_class_attr_catch_re . ' )? # $8 = id/class attributes
|
|
|
840 |
)
|
|
|
841 |
}xs',
|
|
|
842 |
array($this, '_doAnchors_inline_callback'), $text);
|
|
|
843 |
|
|
|
844 |
// Last, handle reference-style shortcuts: [link text]
|
|
|
845 |
// These must come last in case you've also got [link text][1]
|
|
|
846 |
// or [link text](/foo)
|
|
|
847 |
$text = preg_replace_callback('{
|
|
|
848 |
( # wrap whole match in $1
|
|
|
849 |
\[
|
|
|
850 |
([^\[\]]+) # link text = $2; can\'t contain [ or ]
|
|
|
851 |
\]
|
|
|
852 |
)
|
|
|
853 |
}xs',
|
|
|
854 |
array($this, '_doAnchors_reference_callback'), $text);
|
|
|
855 |
|
|
|
856 |
$this->in_anchor = false;
|
|
|
857 |
return $text;
|
|
|
858 |
}
|
|
|
859 |
|
|
|
860 |
/**
|
|
|
861 |
* Callback for reference anchors
|
|
|
862 |
* @param array $matches
|
|
|
863 |
* @return string
|
|
|
864 |
*/
|
|
|
865 |
protected function _doAnchors_reference_callback($matches) {
|
|
|
866 |
$whole_match = $matches[1];
|
|
|
867 |
$link_text = $matches[2];
|
|
|
868 |
$link_id =& $matches[3];
|
|
|
869 |
|
|
|
870 |
if ($link_id == "") {
|
|
|
871 |
// for shortcut links like [this][] or [this].
|
|
|
872 |
$link_id = $link_text;
|
|
|
873 |
}
|
|
|
874 |
|
|
|
875 |
// lower-case and turn embedded newlines into spaces
|
|
|
876 |
$link_id = strtolower($link_id);
|
|
|
877 |
$link_id = preg_replace('{[ ]?\n}', ' ', $link_id);
|
|
|
878 |
|
|
|
879 |
if (isset($this->urls[$link_id])) {
|
|
|
880 |
$url = $this->urls[$link_id];
|
|
|
881 |
$url = $this->encodeURLAttribute($url);
|
|
|
882 |
|
|
|
883 |
$result = "<a href=\"$url\"";
|
|
|
884 |
if ( isset( $this->titles[$link_id] ) ) {
|
|
|
885 |
$title = $this->titles[$link_id];
|
|
|
886 |
$title = $this->encodeAttribute($title);
|
|
|
887 |
$result .= " title=\"$title\"";
|
|
|
888 |
}
|
|
|
889 |
if (isset($this->ref_attr[$link_id]))
|
|
|
890 |
$result .= $this->ref_attr[$link_id];
|
|
|
891 |
|
|
|
892 |
$link_text = $this->runSpanGamut($link_text);
|
|
|
893 |
$result .= ">$link_text</a>";
|
|
|
894 |
$result = $this->hashPart($result);
|
|
|
895 |
}
|
|
|
896 |
else {
|
|
|
897 |
$result = $whole_match;
|
|
|
898 |
}
|
|
|
899 |
return $result;
|
|
|
900 |
}
|
|
|
901 |
|
|
|
902 |
/**
|
|
|
903 |
* Callback for inline anchors
|
|
|
904 |
* @param array $matches
|
|
|
905 |
* @return string
|
|
|
906 |
*/
|
|
|
907 |
protected function _doAnchors_inline_callback($matches) {
|
|
|
908 |
$link_text = $this->runSpanGamut($matches[2]);
|
|
|
909 |
$url = $matches[3] === '' ? $matches[4] : $matches[3];
|
|
|
910 |
$title_quote =& $matches[6];
|
|
|
911 |
$title =& $matches[7];
|
|
|
912 |
$attr = $this->doExtraAttributes("a", $dummy =& $matches[8]);
|
|
|
913 |
|
|
|
914 |
// if the URL was of the form <s p a c e s> it got caught by the HTML
|
|
|
915 |
// tag parser and hashed. Need to reverse the process before using the URL.
|
|
|
916 |
$unhashed = $this->unhash($url);
|
|
|
917 |
if ($unhashed !== $url)
|
|
|
918 |
$url = preg_replace('/^<(.*)>$/', '\1', $unhashed);
|
|
|
919 |
|
|
|
920 |
$url = $this->encodeURLAttribute($url);
|
|
|
921 |
|
|
|
922 |
$result = "<a href=\"$url\"";
|
|
|
923 |
if (isset($title) && $title_quote) {
|
|
|
924 |
$title = $this->encodeAttribute($title);
|
|
|
925 |
$result .= " title=\"$title\"";
|
|
|
926 |
}
|
|
|
927 |
$result .= $attr;
|
|
|
928 |
|
|
|
929 |
$link_text = $this->runSpanGamut($link_text);
|
|
|
930 |
$result .= ">$link_text</a>";
|
|
|
931 |
|
|
|
932 |
return $this->hashPart($result);
|
|
|
933 |
}
|
|
|
934 |
|
|
|
935 |
/**
|
|
|
936 |
* Turn Markdown image shortcuts into <img> tags.
|
|
|
937 |
* @param string $text
|
|
|
938 |
* @return string
|
|
|
939 |
*/
|
|
|
940 |
protected function doImages($text) {
|
|
|
941 |
// First, handle reference-style labeled images: ![alt text][id]
|
|
|
942 |
$text = preg_replace_callback('{
|
|
|
943 |
( # wrap whole match in $1
|
|
|
944 |
!\[
|
|
|
945 |
(' . $this->nested_brackets_re . ') # alt text = $2
|
|
|
946 |
\]
|
|
|
947 |
|
|
|
948 |
[ ]? # one optional space
|
|
|
949 |
(?:\n[ ]*)? # one optional newline followed by spaces
|
|
|
950 |
|
|
|
951 |
\[
|
|
|
952 |
(.*?) # id = $3
|
|
|
953 |
\]
|
|
|
954 |
|
|
|
955 |
)
|
|
|
956 |
}xs',
|
|
|
957 |
array($this, '_doImages_reference_callback'), $text);
|
|
|
958 |
|
|
|
959 |
// Next, handle inline images: 
|
|
|
960 |
// Don't forget: encode * and _
|
|
|
961 |
$text = preg_replace_callback('{
|
|
|
962 |
( # wrap whole match in $1
|
|
|
963 |
!\[
|
|
|
964 |
(' . $this->nested_brackets_re . ') # alt text = $2
|
|
|
965 |
\]
|
|
|
966 |
\s? # One optional whitespace character
|
|
|
967 |
\( # literal paren
|
|
|
968 |
[ \n]*
|
|
|
969 |
(?:
|
|
|
970 |
<(\S*)> # src url = $3
|
|
|
971 |
|
|
|
|
972 |
(' . $this->nested_url_parenthesis_re . ') # src url = $4
|
|
|
973 |
)
|
|
|
974 |
[ \n]*
|
|
|
975 |
( # $5
|
|
|
976 |
([\'"]) # quote char = $6
|
|
|
977 |
(.*?) # title = $7
|
|
|
978 |
\6 # matching quote
|
|
|
979 |
[ \n]*
|
|
|
980 |
)? # title is optional
|
|
|
981 |
\)
|
|
|
982 |
(?:[ ]? ' . $this->id_class_attr_catch_re . ' )? # $8 = id/class attributes
|
|
|
983 |
)
|
|
|
984 |
}xs',
|
|
|
985 |
array($this, '_doImages_inline_callback'), $text);
|
|
|
986 |
|
|
|
987 |
return $text;
|
|
|
988 |
}
|
|
|
989 |
|
|
|
990 |
/**
|
|
|
991 |
* Callback for referenced images
|
|
|
992 |
* @param array $matches
|
|
|
993 |
* @return string
|
|
|
994 |
*/
|
|
|
995 |
protected function _doImages_reference_callback($matches) {
|
|
|
996 |
$whole_match = $matches[1];
|
|
|
997 |
$alt_text = $matches[2];
|
|
|
998 |
$link_id = strtolower($matches[3]);
|
|
|
999 |
|
|
|
1000 |
if ($link_id === "") {
|
|
|
1001 |
$link_id = strtolower($alt_text); // for shortcut links like ![this][].
|
|
|
1002 |
}
|
|
|
1003 |
|
|
|
1004 |
$alt_text = $this->encodeAttribute($alt_text);
|
|
|
1005 |
if (isset($this->urls[$link_id])) {
|
|
|
1006 |
$url = $this->encodeURLAttribute($this->urls[$link_id]);
|
|
|
1007 |
$result = "<img src=\"$url\" alt=\"$alt_text\"";
|
|
|
1008 |
if (isset($this->titles[$link_id])) {
|
|
|
1009 |
$title = $this->titles[$link_id];
|
|
|
1010 |
$title = $this->encodeAttribute($title);
|
|
|
1011 |
$result .= " title=\"$title\"";
|
|
|
1012 |
}
|
|
|
1013 |
if (isset($this->ref_attr[$link_id])) {
|
|
|
1014 |
$result .= $this->ref_attr[$link_id];
|
|
|
1015 |
}
|
|
|
1016 |
$result .= $this->empty_element_suffix;
|
|
|
1017 |
$result = $this->hashPart($result);
|
|
|
1018 |
}
|
|
|
1019 |
else {
|
|
|
1020 |
// If there's no such link ID, leave intact:
|
|
|
1021 |
$result = $whole_match;
|
|
|
1022 |
}
|
|
|
1023 |
|
|
|
1024 |
return $result;
|
|
|
1025 |
}
|
|
|
1026 |
|
|
|
1027 |
/**
|
|
|
1028 |
* Callback for inline images
|
|
|
1029 |
* @param array $matches
|
|
|
1030 |
* @return string
|
|
|
1031 |
*/
|
|
|
1032 |
protected function _doImages_inline_callback($matches) {
|
|
|
1033 |
$alt_text = $matches[2];
|
|
|
1034 |
$url = $matches[3] === '' ? $matches[4] : $matches[3];
|
|
|
1035 |
$title_quote =& $matches[6];
|
|
|
1036 |
$title =& $matches[7];
|
|
|
1037 |
$attr = $this->doExtraAttributes("img", $dummy =& $matches[8]);
|
|
|
1038 |
|
|
|
1039 |
$alt_text = $this->encodeAttribute($alt_text);
|
|
|
1040 |
$url = $this->encodeURLAttribute($url);
|
|
|
1041 |
$result = "<img src=\"$url\" alt=\"$alt_text\"";
|
|
|
1042 |
if (isset($title) && $title_quote) {
|
|
|
1043 |
$title = $this->encodeAttribute($title);
|
|
|
1044 |
$result .= " title=\"$title\""; // $title already quoted
|
|
|
1045 |
}
|
|
|
1046 |
$result .= $attr;
|
|
|
1047 |
$result .= $this->empty_element_suffix;
|
|
|
1048 |
|
|
|
1049 |
return $this->hashPart($result);
|
|
|
1050 |
}
|
|
|
1051 |
|
|
|
1052 |
/**
|
|
|
1053 |
* Process markdown headers. Redefined to add ID and class attribute support.
|
|
|
1054 |
* @param string $text
|
|
|
1055 |
* @return string
|
|
|
1056 |
*/
|
|
|
1057 |
protected function doHeaders($text) {
|
|
|
1058 |
// Setext-style headers:
|
|
|
1059 |
// Header 1 {#header1}
|
|
|
1060 |
// ========
|
|
|
1061 |
//
|
|
|
1062 |
// Header 2 {#header2 .class1 .class2}
|
|
|
1063 |
// --------
|
|
|
1064 |
//
|
|
|
1065 |
$text = preg_replace_callback(
|
|
|
1066 |
'{
|
|
|
1067 |
(^.+?) # $1: Header text
|
|
|
1068 |
(?:[ ]+ ' . $this->id_class_attr_catch_re . ' )? # $3 = id/class attributes
|
|
|
1069 |
[ ]*\n(=+|-+)[ ]*\n+ # $3: Header footer
|
|
|
1070 |
}mx',
|
|
|
1071 |
array($this, '_doHeaders_callback_setext'), $text);
|
|
|
1072 |
|
|
|
1073 |
// atx-style headers:
|
|
|
1074 |
// # Header 1 {#header1}
|
|
|
1075 |
// ## Header 2 {#header2}
|
|
|
1076 |
// ## Header 2 with closing hashes ## {#header3.class1.class2}
|
|
|
1077 |
// ...
|
|
|
1078 |
// ###### Header 6 {.class2}
|
|
|
1079 |
//
|
|
|
1080 |
$text = preg_replace_callback('{
|
|
|
1081 |
^(\#{1,6}) # $1 = string of #\'s
|
|
|
1082 |
[ ]'.($this->hashtag_protection ? '+' : '*').'
|
|
|
1083 |
(.+?) # $2 = Header text
|
|
|
1084 |
[ ]*
|
|
|
1085 |
\#* # optional closing #\'s (not counted)
|
|
|
1086 |
(?:[ ]+ ' . $this->id_class_attr_catch_re . ' )? # $3 = id/class attributes
|
|
|
1087 |
[ ]*
|
|
|
1088 |
\n+
|
|
|
1089 |
}xm',
|
|
|
1090 |
array($this, '_doHeaders_callback_atx'), $text);
|
|
|
1091 |
|
|
|
1092 |
return $text;
|
|
|
1093 |
}
|
|
|
1094 |
|
|
|
1095 |
/**
|
|
|
1096 |
* Callback for setext headers
|
|
|
1097 |
* @param array $matches
|
|
|
1098 |
* @return string
|
|
|
1099 |
*/
|
|
|
1100 |
protected function _doHeaders_callback_setext($matches) {
|
|
|
1101 |
if ($matches[3] === '-' && preg_match('{^- }', $matches[1])) {
|
|
|
1102 |
return $matches[0];
|
|
|
1103 |
}
|
|
|
1104 |
|
|
|
1105 |
$level = $matches[3][0] === '=' ? 1 : 2;
|
|
|
1106 |
|
|
|
1107 |
$defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[1]) : null;
|
|
|
1108 |
|
|
|
1109 |
$attr = $this->doExtraAttributes("h$level", $dummy =& $matches[2], $defaultId);
|
|
|
1110 |
$block = "<h$level$attr>" . $this->runSpanGamut($matches[1]) . "</h$level>";
|
|
|
1111 |
return "\n" . $this->hashBlock($block) . "\n\n";
|
|
|
1112 |
}
|
|
|
1113 |
|
|
|
1114 |
/**
|
|
|
1115 |
* Callback for atx headers
|
|
|
1116 |
* @param array $matches
|
|
|
1117 |
* @return string
|
|
|
1118 |
*/
|
|
|
1119 |
protected function _doHeaders_callback_atx($matches) {
|
|
|
1120 |
$level = strlen($matches[1]);
|
|
|
1121 |
|
|
|
1122 |
$defaultId = is_callable($this->header_id_func) ? call_user_func($this->header_id_func, $matches[2]) : null;
|
|
|
1123 |
$attr = $this->doExtraAttributes("h$level", $dummy =& $matches[3], $defaultId);
|
|
|
1124 |
$block = "<h$level$attr>" . $this->runSpanGamut($matches[2]) . "</h$level>";
|
|
|
1125 |
return "\n" . $this->hashBlock($block) . "\n\n";
|
|
|
1126 |
}
|
|
|
1127 |
|
|
|
1128 |
/**
|
|
|
1129 |
* Form HTML tables.
|
|
|
1130 |
* @param string $text
|
|
|
1131 |
* @return string
|
|
|
1132 |
*/
|
|
|
1133 |
protected function doTables($text) {
|
|
|
1134 |
$less_than_tab = $this->tab_width - 1;
|
|
|
1135 |
// Find tables with leading pipe.
|
|
|
1136 |
//
|
|
|
1137 |
// | Header 1 | Header 2
|
|
|
1138 |
// | -------- | --------
|
|
|
1139 |
// | Cell 1 | Cell 2
|
|
|
1140 |
// | Cell 3 | Cell 4
|
|
|
1141 |
$text = preg_replace_callback('
|
|
|
1142 |
{
|
|
|
1143 |
^ # Start of a line
|
|
|
1144 |
[ ]{0,' . $less_than_tab . '} # Allowed whitespace.
|
|
|
1145 |
[|] # Optional leading pipe (present)
|
|
|
1146 |
(.+) \n # $1: Header row (at least one pipe)
|
|
|
1147 |
|
|
|
1148 |
[ ]{0,' . $less_than_tab . '} # Allowed whitespace.
|
|
|
1149 |
[|] ([ ]*[-:]+[-| :]*) \n # $2: Header underline
|
|
|
1150 |
|
|
|
1151 |
( # $3: Cells
|
|
|
1152 |
(?>
|
|
|
1153 |
[ ]* # Allowed whitespace.
|
|
|
1154 |
[|] .* \n # Row content.
|
|
|
1155 |
)*
|
|
|
1156 |
)
|
|
|
1157 |
(?=\n|\Z) # Stop at final double newline.
|
|
|
1158 |
}xm',
|
|
|
1159 |
array($this, '_doTable_leadingPipe_callback'), $text);
|
|
|
1160 |
|
|
|
1161 |
// Find tables without leading pipe.
|
|
|
1162 |
//
|
|
|
1163 |
// Header 1 | Header 2
|
|
|
1164 |
// -------- | --------
|
|
|
1165 |
// Cell 1 | Cell 2
|
|
|
1166 |
// Cell 3 | Cell 4
|
|
|
1167 |
$text = preg_replace_callback('
|
|
|
1168 |
{
|
|
|
1169 |
^ # Start of a line
|
|
|
1170 |
[ ]{0,' . $less_than_tab . '} # Allowed whitespace.
|
|
|
1171 |
(\S.*[|].*) \n # $1: Header row (at least one pipe)
|
|
|
1172 |
|
|
|
1173 |
[ ]{0,' . $less_than_tab . '} # Allowed whitespace.
|
|
|
1174 |
([-:]+[ ]*[|][-| :]*) \n # $2: Header underline
|
|
|
1175 |
|
|
|
1176 |
( # $3: Cells
|
|
|
1177 |
(?>
|
|
|
1178 |
.* [|] .* \n # Row content
|
|
|
1179 |
)*
|
|
|
1180 |
)
|
|
|
1181 |
(?=\n|\Z) # Stop at final double newline.
|
|
|
1182 |
}xm',
|
|
|
1183 |
array($this, '_DoTable_callback'), $text);
|
|
|
1184 |
|
|
|
1185 |
return $text;
|
|
|
1186 |
}
|
|
|
1187 |
|
|
|
1188 |
/**
|
|
|
1189 |
* Callback for removing the leading pipe for each row
|
|
|
1190 |
* @param array $matches
|
|
|
1191 |
* @return string
|
|
|
1192 |
*/
|
|
|
1193 |
protected function _doTable_leadingPipe_callback($matches) {
|
|
|
1194 |
$head = $matches[1];
|
|
|
1195 |
$underline = $matches[2];
|
|
|
1196 |
$content = $matches[3];
|
|
|
1197 |
|
|
|
1198 |
$content = preg_replace('/^ *[|]/m', '', $content);
|
|
|
1199 |
|
|
|
1200 |
return $this->_doTable_callback(array($matches[0], $head, $underline, $content));
|
|
|
1201 |
}
|
|
|
1202 |
|
|
|
1203 |
/**
|
|
|
1204 |
* Make the align attribute in a table
|
|
|
1205 |
* @param string $alignname
|
|
|
1206 |
* @return string
|
|
|
1207 |
*/
|
|
|
1208 |
protected function _doTable_makeAlignAttr($alignname) {
|
|
|
1209 |
if (empty($this->table_align_class_tmpl)) {
|
|
|
1210 |
return " align=\"$alignname\"";
|
|
|
1211 |
}
|
|
|
1212 |
|
|
|
1213 |
$classname = str_replace('%%', $alignname, $this->table_align_class_tmpl);
|
|
|
1214 |
return " class=\"$classname\"";
|
|
|
1215 |
}
|
|
|
1216 |
|
|
|
1217 |
/**
|
|
|
1218 |
* Calback for processing tables
|
|
|
1219 |
* @param array $matches
|
|
|
1220 |
* @return string
|
|
|
1221 |
*/
|
|
|
1222 |
protected function _doTable_callback($matches) {
|
|
|
1223 |
$head = $matches[1];
|
|
|
1224 |
$underline = $matches[2];
|
|
|
1225 |
$content = $matches[3];
|
|
|
1226 |
$attr = [];
|
|
|
1227 |
|
|
|
1228 |
// Remove any tailing pipes for each line.
|
|
|
1229 |
$head = preg_replace('/[|] *$/m', '', $head);
|
|
|
1230 |
$underline = preg_replace('/[|] *$/m', '', $underline);
|
|
|
1231 |
$content = preg_replace('/[|] *$/m', '', $content);
|
|
|
1232 |
|
|
|
1233 |
// Reading alignement from header underline.
|
|
|
1234 |
$separators = preg_split('/ *[|] */', $underline);
|
|
|
1235 |
foreach ($separators as $n => $s) {
|
|
|
1236 |
if (preg_match('/^ *-+: *$/', $s))
|
|
|
1237 |
$attr[$n] = $this->_doTable_makeAlignAttr('right');
|
|
|
1238 |
else if (preg_match('/^ *:-+: *$/', $s))
|
|
|
1239 |
$attr[$n] = $this->_doTable_makeAlignAttr('center');
|
|
|
1240 |
else if (preg_match('/^ *:-+ *$/', $s))
|
|
|
1241 |
$attr[$n] = $this->_doTable_makeAlignAttr('left');
|
|
|
1242 |
else
|
|
|
1243 |
$attr[$n] = '';
|
|
|
1244 |
}
|
|
|
1245 |
|
|
|
1246 |
// Parsing span elements, including code spans, character escapes,
|
|
|
1247 |
// and inline HTML tags, so that pipes inside those gets ignored.
|
|
|
1248 |
$head = $this->parseSpan($head);
|
|
|
1249 |
$headers = preg_split('/ *[|] */', $head);
|
|
|
1250 |
$col_count = count($headers);
|
|
|
1251 |
$attr = array_pad($attr, $col_count, '');
|
|
|
1252 |
|
|
|
1253 |
// Write column headers.
|
|
|
1254 |
$text = "<table>\n";
|
|
|
1255 |
$text .= "<thead>\n";
|
|
|
1256 |
$text .= "<tr>\n";
|
|
|
1257 |
foreach ($headers as $n => $header) {
|
|
|
1258 |
$text .= " <th$attr[$n]>" . $this->runSpanGamut(trim($header)) . "</th>\n";
|
|
|
1259 |
}
|
|
|
1260 |
$text .= "</tr>\n";
|
|
|
1261 |
$text .= "</thead>\n";
|
|
|
1262 |
|
|
|
1263 |
// Split content by row.
|
|
|
1264 |
$rows = explode("\n", trim($content, "\n"));
|
|
|
1265 |
|
|
|
1266 |
$text .= "<tbody>\n";
|
|
|
1267 |
foreach ($rows as $row) {
|
|
|
1268 |
// Parsing span elements, including code spans, character escapes,
|
|
|
1269 |
// and inline HTML tags, so that pipes inside those gets ignored.
|
|
|
1270 |
$row = $this->parseSpan($row);
|
|
|
1271 |
|
|
|
1272 |
// Split row by cell.
|
|
|
1273 |
$row_cells = preg_split('/ *[|] */', $row, $col_count);
|
|
|
1274 |
$row_cells = array_pad($row_cells, $col_count, '');
|
|
|
1275 |
|
|
|
1276 |
$text .= "<tr>\n";
|
|
|
1277 |
foreach ($row_cells as $n => $cell) {
|
|
|
1278 |
$text .= " <td$attr[$n]>" . $this->runSpanGamut(trim($cell)) . "</td>\n";
|
|
|
1279 |
}
|
|
|
1280 |
$text .= "</tr>\n";
|
|
|
1281 |
}
|
|
|
1282 |
$text .= "</tbody>\n";
|
|
|
1283 |
$text .= "</table>";
|
|
|
1284 |
|
|
|
1285 |
return $this->hashBlock($text) . "\n";
|
|
|
1286 |
}
|
|
|
1287 |
|
|
|
1288 |
/**
|
|
|
1289 |
* Form HTML definition lists.
|
|
|
1290 |
* @param string $text
|
|
|
1291 |
* @return string
|
|
|
1292 |
*/
|
|
|
1293 |
protected function doDefLists($text) {
|
|
|
1294 |
$less_than_tab = $this->tab_width - 1;
|
|
|
1295 |
|
|
|
1296 |
// Re-usable pattern to match any entire dl list:
|
|
|
1297 |
$whole_list_re = '(?>
|
|
|
1298 |
( # $1 = whole list
|
|
|
1299 |
( # $2
|
|
|
1300 |
[ ]{0,' . $less_than_tab . '}
|
|
|
1301 |
((?>.*\S.*\n)+) # $3 = defined term
|
|
|
1302 |
\n?
|
|
|
1303 |
[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
|
|
|
1304 |
)
|
|
|
1305 |
(?s:.+?)
|
|
|
1306 |
( # $4
|
|
|
1307 |
\z
|
|
|
1308 |
|
|
|
|
1309 |
\n{2,}
|
|
|
1310 |
(?=\S)
|
|
|
1311 |
(?! # Negative lookahead for another term
|
|
|
1312 |
[ ]{0,' . $less_than_tab . '}
|
|
|
1313 |
(?: \S.*\n )+? # defined term
|
|
|
1314 |
\n?
|
|
|
1315 |
[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
|
|
|
1316 |
)
|
|
|
1317 |
(?! # Negative lookahead for another definition
|
|
|
1318 |
[ ]{0,' . $less_than_tab . '}:[ ]+ # colon starting definition
|
|
|
1319 |
)
|
|
|
1320 |
)
|
|
|
1321 |
)
|
|
|
1322 |
)'; // mx
|
|
|
1323 |
|
|
|
1324 |
$text = preg_replace_callback('{
|
|
|
1325 |
(?>\A\n?|(?<=\n\n))
|
|
|
1326 |
' . $whole_list_re . '
|
|
|
1327 |
}mx',
|
|
|
1328 |
array($this, '_doDefLists_callback'), $text);
|
|
|
1329 |
|
|
|
1330 |
return $text;
|
|
|
1331 |
}
|
|
|
1332 |
|
|
|
1333 |
/**
|
|
|
1334 |
* Callback for processing definition lists
|
|
|
1335 |
* @param array $matches
|
|
|
1336 |
* @return string
|
|
|
1337 |
*/
|
|
|
1338 |
protected function _doDefLists_callback($matches) {
|
|
|
1339 |
// Re-usable patterns to match list item bullets and number markers:
|
|
|
1340 |
$list = $matches[1];
|
|
|
1341 |
|
|
|
1342 |
// Turn double returns into triple returns, so that we can make a
|
|
|
1343 |
// paragraph for the last item in a list, if necessary:
|
|
|
1344 |
$result = trim($this->processDefListItems($list));
|
|
|
1345 |
$result = "<dl>\n" . $result . "\n</dl>";
|
|
|
1346 |
return $this->hashBlock($result) . "\n\n";
|
|
|
1347 |
}
|
|
|
1348 |
|
|
|
1349 |
/**
|
|
|
1350 |
* Process the contents of a single definition list, splitting it
|
|
|
1351 |
* into individual term and definition list items.
|
|
|
1352 |
* @param string $list_str
|
|
|
1353 |
* @return string
|
|
|
1354 |
*/
|
|
|
1355 |
protected function processDefListItems($list_str) {
|
|
|
1356 |
|
|
|
1357 |
$less_than_tab = $this->tab_width - 1;
|
|
|
1358 |
|
|
|
1359 |
// Trim trailing blank lines:
|
|
|
1360 |
$list_str = preg_replace("/\n{2,}\\z/", "\n", $list_str);
|
|
|
1361 |
|
|
|
1362 |
// Process definition terms.
|
|
|
1363 |
$list_str = preg_replace_callback('{
|
|
|
1364 |
(?>\A\n?|\n\n+) # leading line
|
|
|
1365 |
( # definition terms = $1
|
|
|
1366 |
[ ]{0,' . $less_than_tab . '} # leading whitespace
|
|
|
1367 |
(?!\:[ ]|[ ]) # negative lookahead for a definition
|
|
|
1368 |
# mark (colon) or more whitespace.
|
|
|
1369 |
(?> \S.* \n)+? # actual term (not whitespace).
|
|
|
1370 |
)
|
|
|
1371 |
(?=\n?[ ]{0,3}:[ ]) # lookahead for following line feed
|
|
|
1372 |
# with a definition mark.
|
|
|
1373 |
}xm',
|
|
|
1374 |
array($this, '_processDefListItems_callback_dt'), $list_str);
|
|
|
1375 |
|
|
|
1376 |
// Process actual definitions.
|
|
|
1377 |
$list_str = preg_replace_callback('{
|
|
|
1378 |
\n(\n+)? # leading line = $1
|
|
|
1379 |
( # marker space = $2
|
|
|
1380 |
[ ]{0,' . $less_than_tab . '} # whitespace before colon
|
|
|
1381 |
\:[ ]+ # definition mark (colon)
|
|
|
1382 |
)
|
|
|
1383 |
((?s:.+?)) # definition text = $3
|
|
|
1384 |
(?= \n+ # stop at next definition mark,
|
|
|
1385 |
(?: # next term or end of text
|
|
|
1386 |
[ ]{0,' . $less_than_tab . '} \:[ ] |
|
|
|
1387 |
<dt> | \z
|
|
|
1388 |
)
|
|
|
1389 |
)
|
|
|
1390 |
}xm',
|
|
|
1391 |
array($this, '_processDefListItems_callback_dd'), $list_str);
|
|
|
1392 |
|
|
|
1393 |
return $list_str;
|
|
|
1394 |
}
|
|
|
1395 |
|
|
|
1396 |
/**
|
|
|
1397 |
* Callback for <dt> elements in definition lists
|
|
|
1398 |
* @param array $matches
|
|
|
1399 |
* @return string
|
|
|
1400 |
*/
|
|
|
1401 |
protected function _processDefListItems_callback_dt($matches) {
|
|
|
1402 |
$terms = explode("\n", trim($matches[1]));
|
|
|
1403 |
$text = '';
|
|
|
1404 |
foreach ($terms as $term) {
|
|
|
1405 |
$term = $this->runSpanGamut(trim($term));
|
|
|
1406 |
$text .= "\n<dt>" . $term . "</dt>";
|
|
|
1407 |
}
|
|
|
1408 |
return $text . "\n";
|
|
|
1409 |
}
|
|
|
1410 |
|
|
|
1411 |
/**
|
|
|
1412 |
* Callback for <dd> elements in definition lists
|
|
|
1413 |
* @param array $matches
|
|
|
1414 |
* @return string
|
|
|
1415 |
*/
|
|
|
1416 |
protected function _processDefListItems_callback_dd($matches) {
|
|
|
1417 |
$leading_line = $matches[1];
|
|
|
1418 |
$marker_space = $matches[2];
|
|
|
1419 |
$def = $matches[3];
|
|
|
1420 |
|
|
|
1421 |
if ($leading_line || preg_match('/\n{2,}/', $def)) {
|
|
|
1422 |
// Replace marker with the appropriate whitespace indentation
|
|
|
1423 |
$def = str_repeat(' ', strlen($marker_space)) . $def;
|
|
|
1424 |
$def = $this->runBlockGamut($this->outdent($def . "\n\n"));
|
|
|
1425 |
$def = "\n". $def ."\n";
|
|
|
1426 |
}
|
|
|
1427 |
else {
|
|
|
1428 |
$def = rtrim($def);
|
|
|
1429 |
$def = $this->runSpanGamut($this->outdent($def));
|
|
|
1430 |
}
|
|
|
1431 |
|
|
|
1432 |
return "\n<dd>" . $def . "</dd>\n";
|
|
|
1433 |
}
|
|
|
1434 |
|
|
|
1435 |
/**
|
|
|
1436 |
* Adding the fenced code block syntax to regular Markdown:
|
|
|
1437 |
*
|
|
|
1438 |
* ~~~
|
|
|
1439 |
* Code block
|
|
|
1440 |
* ~~~
|
|
|
1441 |
*
|
|
|
1442 |
* @param string $text
|
|
|
1443 |
* @return string
|
|
|
1444 |
*/
|
|
|
1445 |
protected function doFencedCodeBlocks($text) {
|
|
|
1446 |
|
|
|
1447 |
$text = preg_replace_callback('{
|
|
|
1448 |
(?:\n|\A)
|
|
|
1449 |
# 1: Opening marker
|
|
|
1450 |
(
|
|
|
1451 |
(?:~{3,}|`{3,}) # 3 or more tildes/backticks.
|
|
|
1452 |
)
|
|
|
1453 |
[ ]*
|
|
|
1454 |
(?:
|
|
|
1455 |
\.?([-_:a-zA-Z0-9]+) # 2: standalone class name
|
|
|
1456 |
)?
|
|
|
1457 |
[ ]*
|
|
|
1458 |
(?:
|
|
|
1459 |
' . $this->id_class_attr_catch_re . ' # 3: Extra attributes
|
|
|
1460 |
)?
|
|
|
1461 |
[ ]* \n # Whitespace and newline following marker.
|
|
|
1462 |
|
|
|
1463 |
# 4: Content
|
|
|
1464 |
(
|
|
|
1465 |
(?>
|
|
|
1466 |
(?!\1 [ ]* \n) # Not a closing marker.
|
|
|
1467 |
.*\n+
|
|
|
1468 |
)+
|
|
|
1469 |
)
|
|
|
1470 |
|
|
|
1471 |
# Closing marker.
|
|
|
1472 |
\1 [ ]* (?= \n )
|
|
|
1473 |
}xm',
|
|
|
1474 |
array($this, '_doFencedCodeBlocks_callback'), $text);
|
|
|
1475 |
|
|
|
1476 |
return $text;
|
|
|
1477 |
}
|
|
|
1478 |
|
|
|
1479 |
/**
|
|
|
1480 |
* Callback to process fenced code blocks
|
|
|
1481 |
* @param array $matches
|
|
|
1482 |
* @return string
|
|
|
1483 |
*/
|
|
|
1484 |
protected function _doFencedCodeBlocks_callback($matches) {
|
|
|
1485 |
$classname =& $matches[2];
|
|
|
1486 |
$attrs =& $matches[3];
|
|
|
1487 |
$codeblock = $matches[4];
|
|
|
1488 |
|
|
|
1489 |
if ($this->code_block_content_func) {
|
|
|
1490 |
$codeblock = call_user_func($this->code_block_content_func, $codeblock, $classname);
|
|
|
1491 |
} else {
|
|
|
1492 |
$codeblock = htmlspecialchars($codeblock, ENT_NOQUOTES);
|
|
|
1493 |
}
|
|
|
1494 |
|
|
|
1495 |
$codeblock = preg_replace_callback('/^\n+/',
|
|
|
1496 |
array($this, '_doFencedCodeBlocks_newlines'), $codeblock);
|
|
|
1497 |
|
|
|
1498 |
$classes = array();
|
|
|
1499 |
if ($classname !== "") {
|
|
|
1500 |
if ($classname[0] === '.') {
|
|
|
1501 |
$classname = substr($classname, 1);
|
|
|
1502 |
}
|
|
|
1503 |
$classes[] = $this->code_class_prefix . $classname;
|
|
|
1504 |
}
|
|
|
1505 |
$attr_str = $this->doExtraAttributes($this->code_attr_on_pre ? "pre" : "code", $attrs, null, $classes);
|
|
|
1506 |
$pre_attr_str = $this->code_attr_on_pre ? $attr_str : '';
|
|
|
1507 |
$code_attr_str = $this->code_attr_on_pre ? '' : $attr_str;
|
|
|
1508 |
$codeblock = "<pre$pre_attr_str><code$code_attr_str>$codeblock</code></pre>";
|
|
|
1509 |
|
|
|
1510 |
return "\n\n".$this->hashBlock($codeblock)."\n\n";
|
|
|
1511 |
}
|
|
|
1512 |
|
|
|
1513 |
/**
|
|
|
1514 |
* Replace new lines in fenced code blocks
|
|
|
1515 |
* @param array $matches
|
|
|
1516 |
* @return string
|
|
|
1517 |
*/
|
|
|
1518 |
protected function _doFencedCodeBlocks_newlines($matches) {
|
|
|
1519 |
return str_repeat("<br$this->empty_element_suffix",
|
|
|
1520 |
strlen($matches[0]));
|
|
|
1521 |
}
|
|
|
1522 |
|
|
|
1523 |
/**
|
|
|
1524 |
* Redefining emphasis markers so that emphasis by underscore does not
|
|
|
1525 |
* work in the middle of a word.
|
|
|
1526 |
* @var array
|
|
|
1527 |
*/
|
|
|
1528 |
protected array $em_relist = array(
|
|
|
1529 |
'' => '(?:(?<!\*)\*(?!\*)|(?<![a-zA-Z0-9_])_(?!_))(?![\.,:;]?\s)',
|
|
|
1530 |
'*' => '(?<![\s*])\*(?!\*)',
|
|
|
1531 |
'_' => '(?<![\s_])_(?![a-zA-Z0-9_])',
|
|
|
1532 |
);
|
|
|
1533 |
protected array $strong_relist = array(
|
|
|
1534 |
'' => '(?:(?<!\*)\*\*(?!\*)|(?<![a-zA-Z0-9_])__(?!_))(?![\.,:;]?\s)',
|
|
|
1535 |
'**' => '(?<![\s*])\*\*(?!\*)',
|
|
|
1536 |
'__' => '(?<![\s_])__(?![a-zA-Z0-9_])',
|
|
|
1537 |
);
|
|
|
1538 |
protected array $em_strong_relist = array(
|
|
|
1539 |
'' => '(?:(?<!\*)\*\*\*(?!\*)|(?<![a-zA-Z0-9_])___(?!_))(?![\.,:;]?\s)',
|
|
|
1540 |
'***' => '(?<![\s*])\*\*\*(?!\*)',
|
|
|
1541 |
'___' => '(?<![\s_])___(?![a-zA-Z0-9_])',
|
|
|
1542 |
);
|
|
|
1543 |
|
|
|
1544 |
/**
|
|
|
1545 |
* Parse text into paragraphs
|
|
|
1546 |
* @param string $text String to process in paragraphs
|
|
|
1547 |
* @param boolean $wrap_in_p Whether paragraphs should be wrapped in <p> tags
|
|
|
1548 |
* @return string HTML output
|
|
|
1549 |
*/
|
|
|
1550 |
protected function formParagraphs($text, $wrap_in_p = true) {
|
|
|
1551 |
// Strip leading and trailing lines:
|
|
|
1552 |
$text = preg_replace('/\A\n+|\n+\z/', '', $text);
|
|
|
1553 |
|
|
|
1554 |
$grafs = preg_split('/\n{2,}/', $text, -1, PREG_SPLIT_NO_EMPTY);
|
|
|
1555 |
|
|
|
1556 |
// Wrap <p> tags and unhashify HTML blocks
|
|
|
1557 |
foreach ($grafs as $key => $value) {
|
|
|
1558 |
$value = trim($this->runSpanGamut($value));
|
|
|
1559 |
|
|
|
1560 |
// Check if this should be enclosed in a paragraph.
|
|
|
1561 |
// Clean tag hashes & block tag hashes are left alone.
|
|
|
1562 |
$is_p = $wrap_in_p && !preg_match('/^B\x1A[0-9]+B|^C\x1A[0-9]+C$/', $value);
|
|
|
1563 |
|
|
|
1564 |
if ($is_p) {
|
|
|
1565 |
$value = "<p>$value</p>";
|
|
|
1566 |
}
|
|
|
1567 |
$grafs[$key] = $value;
|
|
|
1568 |
}
|
|
|
1569 |
|
|
|
1570 |
// Join grafs in one text, then unhash HTML tags.
|
|
|
1571 |
$text = implode("\n\n", $grafs);
|
|
|
1572 |
|
|
|
1573 |
// Finish by removing any tag hashes still present in $text.
|
|
|
1574 |
$text = $this->unhash($text);
|
|
|
1575 |
|
|
|
1576 |
return $text;
|
|
|
1577 |
}
|
|
|
1578 |
|
|
|
1579 |
|
|
|
1580 |
/**
|
|
|
1581 |
* Footnotes - Strips link definitions from text, stores the URLs and
|
|
|
1582 |
* titles in hash references.
|
|
|
1583 |
* @param string $text
|
|
|
1584 |
* @return string
|
|
|
1585 |
*/
|
|
|
1586 |
protected function stripFootnotes($text) {
|
|
|
1587 |
$less_than_tab = $this->tab_width - 1;
|
|
|
1588 |
|
|
|
1589 |
// Link defs are in the form: [^id]: url "optional title"
|
|
|
1590 |
$text = preg_replace_callback('{
|
|
|
1591 |
^[ ]{0,' . $less_than_tab . '}\[\^(.+?)\][ ]?: # note_id = $1
|
|
|
1592 |
[ ]*
|
|
|
1593 |
\n? # maybe *one* newline
|
|
|
1594 |
( # text = $2 (no blank lines allowed)
|
|
|
1595 |
(?:
|
|
|
1596 |
.+ # actual text
|
|
|
1597 |
|
|
|
|
1598 |
\n # newlines but
|
|
|
1599 |
(?!\[.+?\][ ]?:\s)# negative lookahead for footnote or link definition marker.
|
|
|
1600 |
(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed
|
|
|
1601 |
# by non-indented content
|
|
|
1602 |
)*
|
|
|
1603 |
)
|
|
|
1604 |
}xm',
|
|
|
1605 |
array($this, '_stripFootnotes_callback'),
|
|
|
1606 |
$text);
|
|
|
1607 |
return $text;
|
|
|
1608 |
}
|
|
|
1609 |
|
|
|
1610 |
/**
|
|
|
1611 |
* Callback for stripping footnotes
|
|
|
1612 |
* @param array $matches
|
|
|
1613 |
* @return string
|
|
|
1614 |
*/
|
|
|
1615 |
protected function _stripFootnotes_callback($matches) {
|
|
|
1616 |
$note_id = $this->fn_id_prefix . $matches[1];
|
|
|
1617 |
$this->footnotes[$note_id] = $this->outdent($matches[2]);
|
|
|
1618 |
return ''; // String that will replace the block
|
|
|
1619 |
}
|
|
|
1620 |
|
|
|
1621 |
/**
|
|
|
1622 |
* Replace footnote references in $text [^id] with a special text-token
|
|
|
1623 |
* which will be replaced by the actual footnote marker in appendFootnotes.
|
|
|
1624 |
* @param string $text
|
|
|
1625 |
* @return string
|
|
|
1626 |
*/
|
|
|
1627 |
protected function doFootnotes($text) {
|
|
|
1628 |
if (!$this->in_anchor) {
|
|
|
1629 |
$text = preg_replace('{\[\^(.+?)\]}', "F\x1Afn:\\1\x1A:", $text);
|
|
|
1630 |
}
|
|
|
1631 |
return $text;
|
|
|
1632 |
}
|
|
|
1633 |
|
|
|
1634 |
/**
|
|
|
1635 |
* Append footnote list to text
|
|
|
1636 |
* @param string $text
|
|
|
1637 |
* @return string
|
|
|
1638 |
*/
|
|
|
1639 |
protected function appendFootnotes($text) {
|
|
|
1640 |
$text = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}',
|
|
|
1641 |
array($this, '_appendFootnotes_callback'), $text);
|
|
|
1642 |
|
|
|
1643 |
if ( ! empty( $this->footnotes_ordered ) ) {
|
|
|
1644 |
$this->_doFootnotes();
|
|
|
1645 |
if ( ! $this->omit_footnotes ) {
|
|
|
1646 |
$text .= "\n\n";
|
|
|
1647 |
$text .= "<div class=\"footnotes\" role=\"doc-endnotes\">\n";
|
|
|
1648 |
$text .= "<hr" . $this->empty_element_suffix . "\n";
|
|
|
1649 |
$text .= $this->footnotes_assembled;
|
|
|
1650 |
$text .= "</div>";
|
|
|
1651 |
}
|
|
|
1652 |
}
|
|
|
1653 |
return $text;
|
|
|
1654 |
}
|
|
|
1655 |
|
|
|
1656 |
|
|
|
1657 |
/**
|
|
|
1658 |
* Generates the HTML for footnotes. Called by appendFootnotes, even if
|
|
|
1659 |
* footnotes are not being appended.
|
|
|
1660 |
* @return void
|
|
|
1661 |
*/
|
|
|
1662 |
protected function _doFootnotes() {
|
|
|
1663 |
$attr = array();
|
|
|
1664 |
if ($this->fn_backlink_class !== "") {
|
|
|
1665 |
$class = $this->fn_backlink_class;
|
|
|
1666 |
$class = $this->encodeAttribute($class);
|
|
|
1667 |
$attr['class'] = " class=\"$class\"";
|
|
|
1668 |
}
|
|
|
1669 |
$attr['role'] = " role=\"doc-backlink\"";
|
|
|
1670 |
$num = 0;
|
|
|
1671 |
|
|
|
1672 |
$text = "<ol>\n\n";
|
|
|
1673 |
while (!empty($this->footnotes_ordered)) {
|
|
|
1674 |
$footnote = reset($this->footnotes_ordered);
|
|
|
1675 |
$note_id = key($this->footnotes_ordered);
|
|
|
1676 |
unset($this->footnotes_ordered[$note_id]);
|
|
|
1677 |
$ref_count = $this->footnotes_ref_count[$note_id];
|
|
|
1678 |
unset($this->footnotes_ref_count[$note_id]);
|
|
|
1679 |
unset($this->footnotes[$note_id]);
|
|
|
1680 |
|
|
|
1681 |
$footnote .= "\n"; // Need to append newline before parsing.
|
|
|
1682 |
$footnote = $this->runBlockGamut("$footnote\n");
|
|
|
1683 |
$footnote = preg_replace_callback('{F\x1Afn:(.*?)\x1A:}',
|
|
|
1684 |
array($this, '_appendFootnotes_callback'), $footnote);
|
|
|
1685 |
|
|
|
1686 |
$num++;
|
|
|
1687 |
$note_id = $this->encodeAttribute($note_id);
|
|
|
1688 |
|
|
|
1689 |
// Prepare backlink, multiple backlinks if multiple references
|
|
|
1690 |
// Do not create empty backlinks if the html is blank
|
|
|
1691 |
$backlink = "";
|
|
|
1692 |
if (!empty($this->fn_backlink_html)) {
|
|
|
1693 |
for ($ref_num = 1; $ref_num <= $ref_count; ++$ref_num) {
|
|
|
1694 |
if (!empty($this->fn_backlink_title)) {
|
|
|
1695 |
$attr['title'] = ' title="' . $this->encodeAttribute($this->fn_backlink_title) . '"';
|
|
|
1696 |
}
|
|
|
1697 |
if (!empty($this->fn_backlink_label)) {
|
|
|
1698 |
$attr['label'] = ' aria-label="' . $this->encodeAttribute($this->fn_backlink_label) . '"';
|
|
|
1699 |
}
|
|
|
1700 |
$parsed_attr = $this->parseFootnotePlaceholders(
|
|
|
1701 |
implode('', $attr),
|
|
|
1702 |
$num,
|
|
|
1703 |
$ref_num
|
|
|
1704 |
);
|
|
|
1705 |
$backlink_text = $this->parseFootnotePlaceholders(
|
|
|
1706 |
$this->fn_backlink_html,
|
|
|
1707 |
$num,
|
|
|
1708 |
$ref_num
|
|
|
1709 |
);
|
|
|
1710 |
$ref_count_mark = $ref_num > 1 ? $ref_num : '';
|
|
|
1711 |
$backlink .= " <a href=\"#fnref$ref_count_mark:$note_id\"$parsed_attr>$backlink_text</a>";
|
|
|
1712 |
}
|
|
|
1713 |
$backlink = trim($backlink);
|
|
|
1714 |
}
|
|
|
1715 |
|
|
|
1716 |
// Add backlink to last paragraph; create new paragraph if needed.
|
|
|
1717 |
if (!empty($backlink)) {
|
|
|
1718 |
if (preg_match('{</p>$}', $footnote)) {
|
|
|
1719 |
$footnote = substr($footnote, 0, -4) . " $backlink</p>";
|
|
|
1720 |
} else {
|
|
|
1721 |
$footnote .= "\n\n<p>$backlink</p>";
|
|
|
1722 |
}
|
|
|
1723 |
}
|
|
|
1724 |
|
|
|
1725 |
$text .= "<li id=\"fn:$note_id\" role=\"doc-endnote\">\n";
|
|
|
1726 |
$text .= $footnote . "\n";
|
|
|
1727 |
$text .= "</li>\n\n";
|
|
|
1728 |
}
|
|
|
1729 |
$text .= "</ol>\n";
|
|
|
1730 |
|
|
|
1731 |
$this->footnotes_assembled = $text;
|
|
|
1732 |
}
|
|
|
1733 |
|
|
|
1734 |
/**
|
|
|
1735 |
* Callback for appending footnotes
|
|
|
1736 |
* @param array $matches
|
|
|
1737 |
* @return string
|
|
|
1738 |
*/
|
|
|
1739 |
protected function _appendFootnotes_callback($matches) {
|
|
|
1740 |
$node_id = $this->fn_id_prefix . $matches[1];
|
|
|
1741 |
|
|
|
1742 |
// Create footnote marker only if it has a corresponding footnote *and*
|
|
|
1743 |
// the footnote hasn't been used by another marker.
|
|
|
1744 |
if (isset($this->footnotes[$node_id])) {
|
|
|
1745 |
$num =& $this->footnotes_numbers[$node_id];
|
|
|
1746 |
if (!isset($num)) {
|
|
|
1747 |
// Transfer footnote content to the ordered list and give it its
|
|
|
1748 |
// number
|
|
|
1749 |
$this->footnotes_ordered[$node_id] = $this->footnotes[$node_id];
|
|
|
1750 |
$this->footnotes_ref_count[$node_id] = 1;
|
|
|
1751 |
$num = $this->footnote_counter++;
|
|
|
1752 |
$ref_count_mark = '';
|
|
|
1753 |
} else {
|
|
|
1754 |
$ref_count_mark = $this->footnotes_ref_count[$node_id] += 1;
|
|
|
1755 |
}
|
|
|
1756 |
|
|
|
1757 |
$attr = "";
|
|
|
1758 |
if ($this->fn_link_class !== "") {
|
|
|
1759 |
$class = $this->fn_link_class;
|
|
|
1760 |
$class = $this->encodeAttribute($class);
|
|
|
1761 |
$attr .= " class=\"$class\"";
|
|
|
1762 |
}
|
|
|
1763 |
if ($this->fn_link_title !== "") {
|
|
|
1764 |
$title = $this->fn_link_title;
|
|
|
1765 |
$title = $this->encodeAttribute($title);
|
|
|
1766 |
$attr .= " title=\"$title\"";
|
|
|
1767 |
}
|
|
|
1768 |
$attr .= " role=\"doc-noteref\"";
|
|
|
1769 |
|
|
|
1770 |
$attr = str_replace("%%", $num, $attr);
|
|
|
1771 |
$node_id = $this->encodeAttribute($node_id);
|
|
|
1772 |
|
|
|
1773 |
return
|
|
|
1774 |
"<sup id=\"fnref$ref_count_mark:$node_id\">".
|
|
|
1775 |
"<a href=\"#fn:$node_id\"$attr>$num</a>".
|
|
|
1776 |
"</sup>";
|
|
|
1777 |
}
|
|
|
1778 |
|
|
|
1779 |
return "[^" . $matches[1] . "]";
|
|
|
1780 |
}
|
|
|
1781 |
|
|
|
1782 |
/**
|
|
|
1783 |
* Build footnote label by evaluating any placeholders.
|
|
|
1784 |
* - ^^ footnote number
|
|
|
1785 |
* - %% footnote reference number (Nth reference to footnote number)
|
|
|
1786 |
* @param string $label
|
|
|
1787 |
* @param int $footnote_number
|
|
|
1788 |
* @param int $reference_number
|
|
|
1789 |
* @return string
|
|
|
1790 |
*/
|
|
|
1791 |
protected function parseFootnotePlaceholders($label, $footnote_number, $reference_number) {
|
|
|
1792 |
return str_replace(
|
|
|
1793 |
array('^^', '%%'),
|
|
|
1794 |
array($footnote_number, $reference_number),
|
|
|
1795 |
$label
|
|
|
1796 |
);
|
|
|
1797 |
}
|
|
|
1798 |
|
|
|
1799 |
|
|
|
1800 |
/**
|
|
|
1801 |
* Abbreviations - strips abbreviations from text, stores titles in hash
|
|
|
1802 |
* references.
|
|
|
1803 |
* @param string $text
|
|
|
1804 |
* @return string
|
|
|
1805 |
*/
|
|
|
1806 |
protected function stripAbbreviations($text) {
|
|
|
1807 |
$less_than_tab = $this->tab_width - 1;
|
|
|
1808 |
|
|
|
1809 |
// Link defs are in the form: [id]*: url "optional title"
|
|
|
1810 |
$text = preg_replace_callback('{
|
|
|
1811 |
^[ ]{0,' . $less_than_tab . '}\*\[(.+?)\][ ]?: # abbr_id = $1
|
|
|
1812 |
(.*) # text = $2 (no blank lines allowed)
|
|
|
1813 |
}xm',
|
|
|
1814 |
array($this, '_stripAbbreviations_callback'),
|
|
|
1815 |
$text);
|
|
|
1816 |
return $text;
|
|
|
1817 |
}
|
|
|
1818 |
|
|
|
1819 |
/**
|
|
|
1820 |
* Callback for stripping abbreviations
|
|
|
1821 |
* @param array $matches
|
|
|
1822 |
* @return string
|
|
|
1823 |
*/
|
|
|
1824 |
protected function _stripAbbreviations_callback($matches) {
|
|
|
1825 |
$abbr_word = $matches[1];
|
|
|
1826 |
$abbr_desc = $matches[2];
|
|
|
1827 |
if ($this->abbr_word_re) {
|
|
|
1828 |
$this->abbr_word_re .= '|';
|
|
|
1829 |
}
|
|
|
1830 |
$this->abbr_word_re .= preg_quote($abbr_word);
|
|
|
1831 |
$this->abbr_desciptions[$abbr_word] = trim($abbr_desc);
|
|
|
1832 |
return ''; // String that will replace the block
|
|
|
1833 |
}
|
|
|
1834 |
|
|
|
1835 |
/**
|
|
|
1836 |
* Find defined abbreviations in text and wrap them in <abbr> elements.
|
|
|
1837 |
* @param string $text
|
|
|
1838 |
* @return string
|
|
|
1839 |
*/
|
|
|
1840 |
protected function doAbbreviations($text) {
|
|
|
1841 |
if ($this->abbr_word_re) {
|
|
|
1842 |
// cannot use the /x modifier because abbr_word_re may
|
|
|
1843 |
// contain significant spaces:
|
|
|
1844 |
$text = preg_replace_callback('{' .
|
|
|
1845 |
'(?<![\w\x1A])' .
|
|
|
1846 |
'(?:' . $this->abbr_word_re . ')' .
|
|
|
1847 |
'(?![\w\x1A])' .
|
|
|
1848 |
'}',
|
|
|
1849 |
array($this, '_doAbbreviations_callback'), $text);
|
|
|
1850 |
}
|
|
|
1851 |
return $text;
|
|
|
1852 |
}
|
|
|
1853 |
|
|
|
1854 |
/**
|
|
|
1855 |
* Callback for processing abbreviations
|
|
|
1856 |
* @param array $matches
|
|
|
1857 |
* @return string
|
|
|
1858 |
*/
|
|
|
1859 |
protected function _doAbbreviations_callback($matches) {
|
|
|
1860 |
$abbr = $matches[0];
|
|
|
1861 |
if (isset($this->abbr_desciptions[$abbr])) {
|
|
|
1862 |
$desc = $this->abbr_desciptions[$abbr];
|
|
|
1863 |
if (empty($desc)) {
|
|
|
1864 |
return $this->hashPart("<abbr>$abbr</abbr>");
|
|
|
1865 |
}
|
|
|
1866 |
$desc = $this->encodeAttribute($desc);
|
|
|
1867 |
return $this->hashPart("<abbr title=\"$desc\">$abbr</abbr>");
|
|
|
1868 |
}
|
|
|
1869 |
return $matches[0];
|
|
|
1870 |
}
|
|
|
1871 |
}
|