5 * Defines simple text field types.
8 use Drupal\Component\Utility\Html;
9 use Drupal\Component\Utility\Unicode;
10 use Drupal\Core\Routing\RouteMatchInterface;
11 use Drupal\filter\Entity\FilterFormat;
14 * Implements hook_help().
16 function text_help($route_name, RouteMatchInterface $route_match) {
17 switch ($route_name) {
18 case 'help.page.text':
20 $output .= '<h3>' . t('About') . '</h3>';
21 $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' => \Drupal::url('help.page', ['name' => 'field']), ':field_ui' => (\Drupal::moduleHandler()->moduleExists('field_ui')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#', ':text_documentation' => 'https://www.drupal.org/documentation/modules/text']) . '</p>';
22 $output .= '<h3>' . t('Uses') . '</h3>';
24 $output .= '<dt>' . t('Managing and displaying text fields') . '</dt>';
25 $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')) ? \Drupal::url('help.page', ['name' => 'field_ui']) : '#']) . '</dd>';
26 $output .= '<dt>' . t('Creating short text fields') . '</dt>';
27 $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>';
28 $output .= '<dt>' . t('Creating long text fields') . '</dt>';
29 $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>';
30 $output .= '<dt>' . t('Trimming the text length') . '</dt>';
31 $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>';
32 $output .= '<dt>' . t('Displaying summaries instead of trimmed text') . '</dt>';
33 $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>';
34 $output .= '<dt>' . t('Using text formats and editors') . '</dt>';
35 $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' => \Drupal::url('filter.admin_overview')]) . '</dd>';
42 * Generates a trimmed, formatted version of a text field value.
44 * If the end of the summary is not indicated using the <!--break--> delimiter
45 * then we generate the summary automatically, trying to end it at a sensible
46 * place such as the end of a paragraph, a line break, or the end of a sentence
47 * (in that order of preference).
50 * The content for which a summary will be generated.
52 * The format of the content. If the line break filter is present then we
53 * treat newlines embedded in $text as line breaks. If the htmlcorrector
54 * filter is present, it will be run on the generated summary (if different
55 * from the incoming $text).
57 * The desired character length of the summary. If omitted, the default value
58 * will be used. Ignored if the special delimiter is present in $text.
61 * The generated summary.
63 function text_summary($text, $format = NULL, $size = NULL) {
66 $size = \Drupal::config('text.settings')->get('default_summary_length');
69 // Find where the delimiter is in the body
70 $delimiter = strpos($text, '<!--break-->');
72 // If the size is zero, and there is no delimiter, the entire body is the summary.
73 if ($size == 0 && $delimiter === FALSE) {
77 // If a valid delimiter has been specified, use it to chop off the summary.
78 if ($delimiter !== FALSE) {
79 return substr($text, 0, $delimiter);
82 // Retrieve the filters of the specified text format, if any.
84 $filters = FilterFormat::load($format)->filters();
85 // If the specified format does not exist, return nothing. $text is already
86 // filtered text, but the remainder of this function will not be able to
87 // ensure a sane and secure summary.
93 // If we have a short body, the entire body is the summary.
94 if (Unicode::strlen($text) <= $size) {
98 // If the delimiter has not been specified, try to split at paragraph or
99 // sentence boundaries.
101 // The summary may not be longer than maximum length specified. Initial slice.
102 $summary = Unicode::truncate($text, $size);
104 // Store the actual length of the UTF8 string -- which might not be the same
106 $max_rpos = strlen($summary);
108 // How much to cut off the end of the summary so that it doesn't end in the
109 // middle of a paragraph, sentence, or word.
110 // Initialize it to maximum in order to find the minimum.
111 $min_rpos = $max_rpos;
113 // Store the reverse of the summary. We use strpos on the reversed needle and
114 // haystack for speed and convenience.
115 $reversed = strrev($summary);
117 // Build an array of arrays of break points grouped by preference.
120 // A paragraph near the end of sliced summary is most preferable.
121 $break_points[] = ['</p>' => 0];
123 // If no complete paragraph then treat line breaks as paragraphs.
124 $line_breaks = ['<br />' => 6, '<br>' => 4];
125 // Newline only indicates a line break if line break converter
126 // filter is present.
127 if (isset($format) && $filters->has('filter_autop') && $filters->get('filter_autop')->status) {
128 $line_breaks["\n"] = 1;
130 $break_points[] = $line_breaks;
132 // If the first paragraph is too long, split at the end of a sentence.
133 $break_points[] = ['. ' => 1, '! ' => 1, '? ' => 1, '。' => 0, '؟ ' => 1];
135 // Iterate over the groups of break points until a break point is found.
136 foreach ($break_points as $points) {
137 // Look for each break point, starting at the end of the summary.
138 foreach ($points as $point => $offset) {
139 // The summary is already reversed, but the break point isn't.
140 $rpos = strpos($reversed, strrev($point));
141 if ($rpos !== FALSE) {
142 $min_rpos = min($rpos + $offset, $min_rpos);
146 // If a break point was found in this group, slice and stop searching.
147 if ($min_rpos !== $max_rpos) {
148 // Don't slice with length 0. Length must be <0 to slice from RHS.
149 $summary = ($min_rpos === 0) ? $summary : substr($summary, 0, 0 - $min_rpos);
154 // If the htmlcorrector filter is present, apply it to the generated summary.
155 if (isset($format) && $filters->has('filter_htmlcorrector') && $filters->get('filter_htmlcorrector')->status) {
156 $summary = Html::normalize($summary);