111 lines
4.1 KiB
JavaScript
111 lines
4.1 KiB
JavaScript
// $Id$
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(function ($) {
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/**
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* Attach the machine-readable name form element behavior.
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*/
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Drupal.behaviors.machineName = {
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/**
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* Attaches the behavior.
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*
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* @param settings.machineName
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* A list of elements to process, keyed by the HTML ID of the form element
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* containing the human-readable value. Each element is an object defining
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* the following properties:
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* - target: The HTML ID of the machine name form element.
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* - suffix: The HTML ID of a container to show the machine name preview in
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* (usually a field suffix after the human-readable name form element).
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* - label: The label to show for the machine name preview.
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* - replace_pattern: A regular expression (without modifiers) matching
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* disallowed characters in the machine name; e.g., '[^a-z0-9]+'.
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* - replace: A character to replace disallowed characters with; e.g., '_'
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* or '-'.
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*/
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attach: function (context, settings) {
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var self = this;
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$.each(settings.machineName, function (source_id, options) {
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var $source = $(source_id, context).addClass('machine-name-source');
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var $target = $(options.target, context).addClass('machine-name-target');
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var $suffix = $(options.suffix, context);
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var $wrapper = $target.parents('.form-item:first');
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// All elements have to exist.
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if (!$source.length || !$target.length || !$suffix.length || !$wrapper.length) {
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return;
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}
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// Skip processing upon a form validation error on the machine name.
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if ($target.hasClass('error')) {
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return;
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}
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// Hide the form item container of the machine name form element.
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$wrapper.hide();
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// Append the machine name preview to the source field.
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if ($target.is(':disabled')) {
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var machine = $target.val();
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}
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else {
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var machine = self.transliterate($source.val(), options);
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}
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var $preview = $('<span class="machine-name-value">' + machine + '</span>');
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$suffix.empty()
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.append(' ').append('<span class="machine-name-label">' + options.label + ':</span>')
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.append(' ').append($preview);
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// Append a link to edit the machine name, if it is editable, and only if
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// one of the following conditions is met:
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// - the machine name is empty.
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// - the human-readable name is equal to the existing machine name.
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if (!$target.is(':disabled') && ($target.val() == '' || $target.val() == machine)) {
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var $link = $('<span class="admin-link"><a href="#">' + Drupal.t('Edit') + '</a></span>')
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.click(function () {
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$wrapper.show();
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$target.focus();
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$suffix.hide();
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$source.unbind('keyup.machineName');
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return false;
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});
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$suffix.append(' ').append($link);
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// Preview machine name in realtime when the human-readable name changes.
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$source.bind('keyup.machineName change.machineName', function () {
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machine = self.transliterate($(this).val(), options);
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// Set the machine name to the transliterated value.
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if (machine != options.replace && machine != '') {
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$target.val(machine);
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$preview.text(machine);
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$suffix.show();
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}
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else {
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$suffix.hide();
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$target.val(machine);
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$preview.empty();
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}
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});
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// Initialize machine name preview.
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$source.keyup();
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}
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});
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},
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/**
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* Transliterate a human-readable name to a machine name.
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*
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* @param source
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* A string to transliterate.
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* @param settings
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* The machine name settings for the corresponding field, containing:
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* - replace_pattern: A regular expression (without modifiers) matching
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* disallowed characters in the machine name; e.g., '[^a-z0-9]+'.
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* - replace: A character to replace disallowed characters with; e.g., '_'
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* or '-'.
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*
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* @return
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* The transliterated source string.
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*/
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transliterate: function (source, settings) {
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var rx = new RegExp(settings.replace_pattern, 'g');
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return source.toLowerCase().replace(rx, settings.replace);
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}
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};
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})(jQuery);
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