72 行
2.3 KiB
JavaScript
72 行
2.3 KiB
JavaScript
function preg_quote(str, delimiter) {
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// Quote regular expression characters plus an optional character
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//
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// version: 1107.2516
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// discuss at: http://phpjs.org/functions/preg_quote
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// + original by: booeyOH
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// + improved by: Ates Goral (http://magnetiq.com)
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// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
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// + bugfixed by: Onno Marsman
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// + improved by: Brett Zamir (http://brett-zamir.me)
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// * example 1: preg_quote("$40");
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// * returns 1: '\$40'
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// * example 2: preg_quote("*RRRING* Hello?");
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// * returns 2: '\*RRRING\* Hello\?'
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// * example 3: preg_quote("\\.+*?[^]$(){}=!<>|:");
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// * returns 3: '\\\.\+\*\?\[\^\]\$\(\)\{\}\=\!\<\>\|\:'
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return (str + '').replace(new RegExp('[.\\\\+*?\\[\\^\\]$(){}=!<>|:\\' + (delimiter || '') + '-]', 'g'), '\\$&');
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}
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var Formula = {
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init: function () {
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// console.log('Formula.init')
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Formula.initValue();
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Formula.initEvent();
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Formula.initSubmit();
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},
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render: function () {
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var content = $.trim($('#editor').val());
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if (!content) {
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$('#preview').hide();
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return;
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}
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content = encodeURIComponent(content);
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var formulaConfig = editor.getOpt('formulaConfig');
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var src = formulaConfig.imageUrlTemplate.replace(/\{\}/, content);
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$('#previewImage').attr('src', src);
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$('#preview').show();
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},
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initValue: function () {
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var img = editor.selection.getRange().getClosedNode();
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if (img && img.getAttribute('data-formula-image') !== null) {
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var value = img.getAttribute('data-formula-image');
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if (value) {
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$('#editor').val(decodeURIComponent(value));
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Formula.render();
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}
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}
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},
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initEvent: function () {
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var changeTimer = null;
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// console.log('Formula.initEvent');
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$('#editor').on('change keypress', function () {
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changeTimer && clearTimeout(changeTimer);
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changeTimer = setTimeout(function () {
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Formula.render();
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}, 1000);
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});
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$('#inputDemo').on('click', function () {
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$('#editor').val('f(a) = \\frac{1}{2\\pi i} \\oint\\frac{f(z)}{z-a}dz');
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Formula.render();
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});
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},
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initSubmit: function () {
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dialog.onok = function () {
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editor.execCommand('formula', $.trim($('#editor').val()));
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editor.fireEvent('saveScene');
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};
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dialog.oncancel = function () {
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};
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}
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};
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