162 lines
8.2 KiB
Plaintext
162 lines
8.2 KiB
Plaintext
<?php
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/**
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* @file
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* Defines simple text field types.
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*/
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use Drupal\Core\Url;
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use Drupal\Component\Utility\Html;
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use Drupal\Component\Utility\Unicode;
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use Drupal\Core\Routing\RouteMatchInterface;
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use Drupal\filter\Entity\FilterFormat;
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/**
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* Implements hook_help().
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*/
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function text_help($route_name, RouteMatchInterface $route_match) {
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switch ($route_name) {
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case 'help.page.text':
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$output = '';
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$output .= '<h3>' . t('About') . '</h3>';
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$output .= '<p>' . t('The Text module allows you to create short and long text fields with optional summaries. See the <a href=":field">Field module help</a> and the <a href=":field_ui">Field UI help</a> pages for general information on fields and how to create and manage them. For more information, see the <a href=":text_documentation">online documentation for the Text module</a>.', [':field' => Url::fromRoute('help.page', ['name' => 'field'])->toString(), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? Url::fromRoute('help.page', ['name' => 'field_ui'])->toString() : '#', ':text_documentation' => 'https://www.drupal.org/documentation/modules/text']) . '</p>';
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$output .= '<h3>' . t('Uses') . '</h3>';
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$output .= '<dl>';
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$output .= '<dt>' . t('Managing and displaying text fields') . '</dt>';
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$output .= '<dd>' . t('The <em>settings</em> and <em>display</em> of the text field can be configured separately. See the <a href=":field_ui">Field UI help</a> for more information on how to manage fields and their display.', [':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? Url::fromRoute('help.page', ['name' => 'field_ui'])->toString() : '#']) . '</dd>';
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$output .= '<dt>' . t('Creating short text fields') . '</dt>';
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$output .= '<dd>' . t('If you choose <em>Text (plain)</em> or <em>Text (formatted)</em> as the field type on the <em>Manage fields</em> page, then a field with a single row is displayed. You can change the maximum text length in the <em>Field settings</em> when you set up the field.') . '</dd>';
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$output .= '<dt>' . t('Creating long text fields') . '</dt>';
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$output .= '<dd>' . t('If you choose <em>Text (plain, long)</em>, <em>Text (formatted, long)</em>, or <em>Text (formatted, long, with summary)</em> on the <em>Manage fields</em> page, then users can insert text of unlimited length. On the <em>Manage form display</em> page, you can set the number of rows that are displayed to users.') . '</dd>';
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$output .= '<dt>' . t('Trimming the text length') . '</dt>';
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$output .= '<dd>' . t('On the <em>Manage display</em> page you can choose to display a trimmed version of the text, and if so, where to cut off the text.') . '</dd>';
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$output .= '<dt>' . t('Displaying summaries instead of trimmed text') . '</dt>';
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$output .= '<dd>' . t('As an alternative to using a trimmed version of the text, you can enter a separate summary by choosing the <em>Text (formatted, long, with summary)</em> field type on the <em>Manage fields</em> page. Even when <em>Summary input</em> is enabled, and summaries are provided, you can display <em>trimmed</em> text nonetheless by choosing the appropriate format on the <em>Manage display</em> page.') . '</dd>';
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$output .= '<dt>' . t('Using text formats and editors') . '</dt>';
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$output .= '<dd>' . t('If you choose <em>Text (plain)</em> or <em>Text (plain, long)</em> you restrict the input to <em>Plain text</em> only. If you choose <em>Text (formatted)</em>, <em>Text (formatted, long)</em>, or <em>Text (formatted, long with summary)</em> you allow users to write formatted text. Which options are available to individual users depends on the settings on the <a href=":formats">Text formats and editors page</a>.', [':formats' => Url::fromRoute('filter.admin_overview')->toString()]) . '</dd>';
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$output .= '</dl>';
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return $output;
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}
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}
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/**
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* Generates a trimmed, formatted version of a text field value.
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*
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* If the end of the summary is not indicated using the <!--break--> delimiter
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* then we generate the summary automatically, trying to end it at a sensible
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* place such as the end of a paragraph, a line break, or the end of a sentence
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* (in that order of preference).
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*
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* @param $text
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* The content for which a summary will be generated.
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* @param $format
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* The format of the content. If the line break filter is present then we
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* treat newlines embedded in $text as line breaks. If the htmlcorrector
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* filter is present, it will be run on the generated summary (if different
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* from the incoming $text).
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* @param $size
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* The desired character length of the summary. If omitted, the default value
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* will be used. Ignored if the special delimiter is present in $text.
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*
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* @return
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* The generated summary.
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*/
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function text_summary($text, $format = NULL, $size = NULL) {
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if (!isset($size)) {
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$size = \Drupal::config('text.settings')->get('default_summary_length');
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}
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// Find where the delimiter is in the body
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$delimiter = strpos($text, '<!--break-->');
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// If the size is zero, and there is no delimiter, the entire body is the summary.
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if ($size == 0 && $delimiter === FALSE) {
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return $text;
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}
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// If a valid delimiter has been specified, use it to chop off the summary.
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if ($delimiter !== FALSE) {
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return substr($text, 0, $delimiter);
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}
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// Retrieve the filters of the specified text format, if any.
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if (isset($format)) {
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$filter_format = FilterFormat::load($format);
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// If the specified format does not exist, return nothing. $text is already
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// filtered text, but the remainder of this function will not be able to
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// ensure a sane and secure summary.
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if (!$filter_format || !($filters = $filter_format->filters())) {
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return '';
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}
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}
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// If we have a short body, the entire body is the summary.
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if (mb_strlen($text) <= $size) {
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return $text;
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}
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// If the delimiter has not been specified, try to split at paragraph or
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// sentence boundaries.
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// The summary may not be longer than maximum length specified. Initial slice.
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$summary = Unicode::truncate($text, $size);
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// Store the actual length of the UTF8 string -- which might not be the same
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// as $size.
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$max_rpos = strlen($summary);
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// How much to cut off the end of the summary so that it doesn't end in the
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// middle of a paragraph, sentence, or word.
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// Initialize it to maximum in order to find the minimum.
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$min_rpos = $max_rpos;
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// Store the reverse of the summary. We use strpos on the reversed needle and
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// haystack for speed and convenience.
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$reversed = strrev($summary);
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// Build an array of arrays of break points grouped by preference.
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$break_points = [];
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// A paragraph near the end of sliced summary is most preferable.
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$break_points[] = ['</p>' => 0];
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// If no complete paragraph then treat line breaks as paragraphs.
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$line_breaks = ['<br />' => 6, '<br>' => 4];
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// Newline only indicates a line break if line break converter
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// filter is present.
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if (isset($format) && $filters->has('filter_autop') && $filters->get('filter_autop')->status) {
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$line_breaks["\n"] = 1;
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}
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$break_points[] = $line_breaks;
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// If the first paragraph is too long, split at the end of a sentence.
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$break_points[] = ['. ' => 1, '! ' => 1, '? ' => 1, '。' => 0, '؟ ' => 1];
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// Iterate over the groups of break points until a break point is found.
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foreach ($break_points as $points) {
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// Look for each break point, starting at the end of the summary.
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foreach ($points as $point => $offset) {
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// The summary is already reversed, but the break point isn't.
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$rpos = strpos($reversed, strrev($point));
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if ($rpos !== FALSE) {
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$min_rpos = min($rpos + $offset, $min_rpos);
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}
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}
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// If a break point was found in this group, slice and stop searching.
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if ($min_rpos !== $max_rpos) {
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// Don't slice with length 0. Length must be <0 to slice from RHS.
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$summary = ($min_rpos === 0) ? $summary : substr($summary, 0, 0 - $min_rpos);
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break;
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}
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}
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// If the htmlcorrector filter is present, apply it to the generated summary.
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if (isset($format) && $filters->has('filter_htmlcorrector') && $filters->get('filter_htmlcorrector')->status) {
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$summary = Html::normalize($summary);
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}
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return $summary;
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}
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