--- /dev/null
+<?php
+/**
+ * @copyright Copyright (c) 2014 Carsten Brandt
+ * @license https://github.com/cebe/markdown/blob/master/LICENSE
+ * @link https://github.com/cebe/markdown#readme
+ */
+
+namespace cebe\markdown\inline;
+
+// work around https://github.com/facebook/hhvm/issues/1120
+defined('ENT_HTML401') || define('ENT_HTML401', 0);
+
+/**
+ * Addes links and images as well as url markers.
+ *
+ * This trait conflicts with the HtmlTrait. If both are used together,
+ * you have to define a resolution, by defining the HtmlTrait::parseInlineHtml
+ * as private so it is not used directly:
+ *
+ * ```php
+ * use block\HtmlTrait {
+ * parseInlineHtml as private parseInlineHtml;
+ * }
+ * ```
+ *
+ * If the method exists it is called internally by this trait.
+ *
+ * Also make sure to reset references on prepare():
+ *
+ * ```php
+ * protected function prepare()
+ * {
+ * // reset references
+ * $this->references = [];
+ * }
+ * ```
+ */
+trait LinkTrait
+{
+ /**
+ * @var array a list of defined references in this document.
+ */
+ protected $references = [];
+
+ /**
+ * Parses a link indicated by `[`.
+ * @marker [
+ */
+ protected function parseLink($markdown)
+ {
+ if (!in_array('parseLink', array_slice($this->context, 1)) && ($parts = $this->parseLinkOrImage($markdown)) !== false) {
+ list($text, $url, $title, $offset, $key) = $parts;
+ return [
+ [
+ 'link',
+ 'text' => $this->parseInline($text),
+ 'url' => $url,
+ 'title' => $title,
+ 'refkey' => $key,
+ 'orig' => substr($markdown, 0, $offset),
+ ],
+ $offset
+ ];
+ } else {
+ // remove all starting [ markers to avoid next one to be parsed as link
+ $result = '[';
+ $i = 1;
+ while (isset($markdown[$i]) && $markdown[$i] == '[') {
+ $result .= '[';
+ $i++;
+ }
+ return [['text', $result], $i];
+ }
+ }
+
+ /**
+ * Parses an image indicated by `![`.
+ * @marker ![
+ */
+ protected function parseImage($markdown)
+ {
+ if (($parts = $this->parseLinkOrImage(substr($markdown, 1))) !== false) {
+ list($text, $url, $title, $offset, $key) = $parts;
+
+ return [
+ [
+ 'image',
+ 'text' => $text,
+ 'url' => $url,
+ 'title' => $title,
+ 'refkey' => $key,
+ 'orig' => substr($markdown, 0, $offset + 1),
+ ],
+ $offset + 1
+ ];
+ } else {
+ // remove all starting [ markers to avoid next one to be parsed as link
+ $result = '!';
+ $i = 1;
+ while (isset($markdown[$i]) && $markdown[$i] == '[') {
+ $result .= '[';
+ $i++;
+ }
+ return [['text', $result], $i];
+ }
+ }
+
+ protected function parseLinkOrImage($markdown)
+ {
+ if (strpos($markdown, ']') !== false && preg_match('/\[((?>[^\]\[]+|(?R))*)\]/', $markdown, $textMatches)) { // TODO improve bracket regex
+ $text = $textMatches[1];
+ $offset = strlen($textMatches[0]);
+ $markdown = substr($markdown, $offset);
+
+ $pattern = <<<REGEXP
+ /(?(R) # in case of recursion match parentheses
+ \(((?>[^\s()]+)|(?R))*\)
+ | # else match a link with title
+ ^\((((?>[^\s()]+)|(?R))*)(\s+"(.*?)")?\)
+ )/x
+REGEXP;
+ if (preg_match($pattern, $markdown, $refMatches)) {
+ // inline link
+ return [
+ $text,
+ isset($refMatches[2]) ? $refMatches[2] : '', // url
+ empty($refMatches[5]) ? null: $refMatches[5], // title
+ $offset + strlen($refMatches[0]), // offset
+ null, // reference key
+ ];
+ } elseif (preg_match('/^([ \n]?\[(.*?)\])?/s', $markdown, $refMatches)) {
+ // reference style link
+ if (empty($refMatches[2])) {
+ $key = strtolower($text);
+ } else {
+ $key = strtolower($refMatches[2]);
+ }
+ return [
+ $text,
+ null, // url
+ null, // title
+ $offset + strlen($refMatches[0]), // offset
+ $key,
+ ];
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Parses inline HTML.
+ * @marker <
+ */
+ protected function parseLt($text)
+ {
+ if (strpos($text, '>') !== false) {
+ if (!in_array('parseLink', $this->context)) { // do not allow links in links
+ if (preg_match('/^<([^\s]*?@[^\s]*?\.\w+?)>/', $text, $matches)) {
+ // email address
+ return [
+ ['email', $matches[1]],
+ strlen($matches[0])
+ ];
+ } elseif (preg_match('/^<([a-z]{3,}:\/\/[^\s]+?)>/', $text, $matches)) {
+ // URL
+ return [
+ ['url', $matches[1]],
+ strlen($matches[0])
+ ];
+ }
+ }
+ // try inline HTML if it was neither a URL nor email if HtmlTrait is included.
+ if (method_exists($this, 'parseInlineHtml')) {
+ return $this->parseInlineHtml($text);
+ }
+ }
+ return [['text', '<'], 1];
+ }
+
+ protected function renderEmail($block)
+ {
+ $email = htmlspecialchars($block[1], ENT_NOQUOTES | ENT_SUBSTITUTE, 'UTF-8');
+ return "<a href=\"mailto:$email\">$email</a>";
+ }
+
+ protected function renderUrl($block)
+ {
+ $url = htmlspecialchars($block[1], ENT_COMPAT | ENT_HTML401, 'UTF-8');
+ $text = htmlspecialchars(urldecode($block[1]), ENT_NOQUOTES | ENT_SUBSTITUTE, 'UTF-8');
+ return "<a href=\"$url\">$text</a>";
+ }
+
+ protected function lookupReference($key)
+ {
+ $normalizedKey = preg_replace('/\s+/', ' ', $key);
+ if (isset($this->references[$key]) || isset($this->references[$key = $normalizedKey])) {
+ return $this->references[$key];
+ }
+ return false;
+ }
+
+ protected function renderLink($block)
+ {
+ if (isset($block['refkey'])) {
+ if (($ref = $this->lookupReference($block['refkey'])) !== false) {
+ $block = array_merge($block, $ref);
+ } else {
+ return $block['orig'];
+ }
+ }
+ return '<a href="' . htmlspecialchars($block['url'], ENT_COMPAT | ENT_HTML401, 'UTF-8') . '"'
+ . (empty($block['title']) ? '' : ' title="' . htmlspecialchars($block['title'], ENT_COMPAT | ENT_HTML401 | ENT_SUBSTITUTE, 'UTF-8') . '"')
+ . '>' . $this->renderAbsy($block['text']) . '</a>';
+ }
+
+ protected function renderImage($block)
+ {
+ if (isset($block['refkey'])) {
+ if (($ref = $this->lookupReference($block['refkey'])) !== false) {
+ $block = array_merge($block, $ref);
+ } else {
+ return $block['orig'];
+ }
+ }
+ return '<img src="' . htmlspecialchars($block['url'], ENT_COMPAT | ENT_HTML401, 'UTF-8') . '"'
+ . ' alt="' . htmlspecialchars($block['text'], ENT_COMPAT | ENT_HTML401 | ENT_SUBSTITUTE, 'UTF-8') . '"'
+ . (empty($block['title']) ? '' : ' title="' . htmlspecialchars($block['title'], ENT_COMPAT | ENT_HTML401 | ENT_SUBSTITUTE, 'UTF-8') . '"')
+ . ($this->html5 ? '>' : ' />');
+ }
+
+ // references
+
+ protected function identifyReference($line)
+ {
+ return ($line[0] === ' ' || $line[0] === '[') && preg_match('/^ {0,3}\[(.+?)\]:\s*([^\s]+?)(?:\s+[\'"](.+?)[\'"])?\s*$/', $line);
+ }
+
+ /**
+ * Consume link references
+ */
+ protected function consumeReference($lines, $current)
+ {
+ while (isset($lines[$current]) && preg_match('/^ {0,3}\[(.+?)\]:\s*(.+?)(?:\s+[\(\'"](.+?)[\)\'"])?\s*$/', $lines[$current], $matches)) {
+ $label = strtolower($matches[1]);
+
+ $this->references[$label] = [
+ 'url' => $matches[2],
+ ];
+ if (isset($matches[3])) {
+ $this->references[$label]['title'] = $matches[3];
+ } else {
+ // title may be on the next line
+ if (isset($lines[$current + 1]) && preg_match('/^\s+[\(\'"](.+?)[\)\'"]\s*$/', $lines[$current + 1], $matches)) {
+ $this->references[$label]['title'] = $matches[1];
+ $current++;
+ }
+ }
+ $current++;
+ }
+ return [false, --$current];
+ }
+}
projects / yaffs-website / blobdiff