mirror of
https://github.com/silverstripe/silverstripe-framework
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This should allow custom meta tags to be saved in the admin panel. Also, if you use html5 video or audio the source sub tag would have been stripped two these are all the tags that may be empty and are valid.
177 lines
6.3 KiB
PHP
177 lines
6.3 KiB
PHP
<?php
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/**
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* Represents a large text field that contains HTML content.
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* This behaves similarly to {@link Text}, but the template processor won't escape any HTML content within it.
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*
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* @see HTMLVarchar
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* @see Text
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* @see Varchar
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*
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* @package framework
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* @subpackage model
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*/
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class HTMLText extends Text {
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public static $escape_type = 'xml';
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static $casting = array(
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"AbsoluteLinks" => "HTMLText",
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"BigSummary" => "HTMLText",
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"ContextSummary" => "HTMLText",
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"FirstParagraph" => "HTMLText",
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"FirstSentence" => "HTMLText",
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"LimitCharacters" => "HTMLText",
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"LimitSentences" => "HTMLText",
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"Lower" => "HTMLText",
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"LowerCase" => "HTMLText",
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"Summary" => "HTMLText",
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"Upper" => "HTMLText",
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"UpperCase" => "HTMLText",
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'EscapeXML' => 'HTMLText',
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'LimitWordCount' => 'HTMLText',
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'LimitWordCountXML' => 'HTMLText',
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'NoHTML' => 'Text',
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);
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/**
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* Create a summary of the content. This will be some section of the first paragraph, limited by
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* $maxWords. All internal tags are stripped out - the return value is a string
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*
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* This is sort of the HTML aware equivilent to Text#Summary, although the logic for summarising is not exactly
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* the same
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*
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* @param int $maxWords Maximum number of words to return - may return less, but never more. Pass -1 for no limit
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* @param int $flex Number of words to search through when looking for a nice cut point
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* @param string $add What to add to the end of the summary if we cut at a less-than-ideal cut point
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* @return string A nice(ish) summary with no html tags (but possibly still some html entities)
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*
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* @see framework/core/model/fieldtypes/Text#Summary($maxWords)
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*/
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public function Summary($maxWords = 50, $flex = 15, $add = '...') {
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$str = false;
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/* First we need the text of the first paragraph, without tags. Try using SimpleXML first */
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if (class_exists('SimpleXMLElement')) {
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$doc = new DOMDocument();
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// Catch warnings thrown by loadHTML and turn them into a failure boolean rather than a SilverStripe error
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set_error_handler(create_function('$no, $str', 'throw new Exception("HTML Parse Error: ".$str);'), E_ALL);
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// Nonbreaking spaces get converted into weird characters, so strip them
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$value = str_replace(' ', ' ', $this->value);
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try {
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$res = $doc->loadHTML('<meta content="text/html; charset=utf-8" http-equiv="Content-type"/>' . $value);
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}
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catch (Exception $e) { $res = false; }
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restore_error_handler();
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if ($res) {
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$xml = simplexml_import_dom($doc);
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$res = $xml->xpath('//p');
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if (!empty($res)) $str = strip_tags($res[0]->asXML());
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}
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}
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/* If that failed, most likely the passed HTML is broken. use a simple regex + a custom more brutal strip_tags.
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* We don't use strip_tags because that does very badly on broken HTML */
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if (!$str) {
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/* See if we can pull a paragraph out*/
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// Strip out any images in case there's one at the beginning. Not doing this will return a blank paragraph
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$str = preg_replace('{^\s*(<.+?>)*<img[^>]*>}', '', $this->value);
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if (preg_match('{<p(\s[^<>]*)?>(.*[A-Za-z]+.*)</p>}', $str, $matches)) $str = $matches[2];
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/* If _that_ failed, just use the whole text */
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if (!$str) $str = $this->value;
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/* Now pull out all the html-alike stuff */
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/* Take out anything that is obviously a tag */
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$str = preg_replace('{</?[a-zA-Z]+[^<>]*>}', '', $str);
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/* Strip out any left over looking bits. Textual < or > should already be encoded to < or > */
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$str = preg_replace('{</|<|>}', '', $str);
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}
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/* Now split into words. If we are under the maxWords limit, just return the whole string (re-implode for
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* whitespace normalization) */
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$words = preg_split('/\s+/', $str);
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if ($maxWords == -1 || count($words) <= $maxWords) return implode(' ', $words);
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/* Otherwise work backwards for a looking for a sentence ending (we try to avoid abbreviations, but aren't
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* very good at it) */
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for ($i = $maxWords; $i >= $maxWords - $flex && $i >= 0; $i--) {
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if (preg_match('/\.$/', $words[$i]) && !preg_match('/(Dr|Mr|Mrs|Ms|Miss|Sr|Jr|No)\.$/i', $words[$i])) {
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return implode(' ', array_slice($words, 0, $i+1));
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}
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}
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// If we didn't find a sentence ending quickly enough, just cut at the maxWords point and add '...' to the end
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return implode(' ', array_slice($words, 0, $maxWords)) . $add;
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}
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/**
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* Returns the first sentence from the first paragraph. If it can't figure out what the first paragraph is (or
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* there isn't one), it returns the same as Summary()
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*
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* This is the HTML aware equivilent to Text#FirstSentence
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*
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* @see framework/core/model/fieldtypes/Text#FirstSentence()
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*/
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public function FirstSentence() {
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/* Use summary's html processing logic to get the first paragraph */
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$paragraph = $this->Summary(-1);
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/* Then look for the first sentence ending. We could probably use a nice regex, but for now this will do */
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$words = preg_split('/\s+/', $paragraph);
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foreach ($words as $i => $word) {
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if (preg_match('/\.$/', $word) && !preg_match('/(Dr|Mr|Mrs|Ms|Miss|Sr|Jr|No)\.$/i', $word)) {
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return implode(' ', array_slice($words, 0, $i+1));
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}
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}
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/* If we didn't find a sentence ending, use the summary. We re-call rather than using paragraph so that
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* Summary will limit the result this time */
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return $this->Summary();
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}
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public function forTemplate() {
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return ShortcodeParser::get_active()->parse($this->value);
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}
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/**
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* Returns true if the field has meaningful content.
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* Excludes null content like <h1></h1>, <p></p> ,etc
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*
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* @return boolean
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*/
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public function exists() {
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// If it's blank, it's blank
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if(!parent::exists()) {
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return false;
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}
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// If it's got a content tag
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if(preg_match('/<(img|embed|object|iframe|meta|source)[^>]*>/i', $this->value)) {
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return true;
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}
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// If it's just one or two tags on its own (and not the above) it's empty.
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// This might be <p></p> or <h1></h1> or whatever.
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if(preg_match('/^[\\s]*(<[^>]+>[\\s]*){1,2}$/', $this->value)) {
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return false;
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}
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// Otherwise its content is genuine content
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return true;
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}
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public function scaffoldFormField($title = null, $params = null) {
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return new HtmlEditorField($this->name, $title);
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}
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public function scaffoldSearchField($title = null, $params = null) {
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return new TextField($this->name, $title);
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}
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}
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