mirror of
https://github.com/Jermolene/TiddlyWiki5
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![Jeremy Ruston](/assets/img/avatar_default.png)
It preserves comments and text positions, enabling us to do syntax highlighting. Hopefully.
171 lines
6.5 KiB
JavaScript
171 lines
6.5 KiB
JavaScript
/*
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Copyright (C) 2011 Ariya Hidayat <ariya.hidayat@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*jslint browser:true */
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var timerId;
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function collectRegex() {
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'use strict';
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function id(i) {
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return document.getElementById(i);
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}
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function escaped(str) {
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return str.replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">");
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}
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function setText(id, str) {
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var el = document.getElementById(id);
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if (typeof el.innerText === 'string') {
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el.innerText = str;
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} else {
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el.textContent = str;
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}
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}
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function isLineTerminator(ch) {
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return (ch === '\n' || ch === '\r' || ch === '\u2028' || ch === '\u2029');
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}
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function process(delay) {
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if (timerId) {
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window.clearTimeout(timerId);
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}
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timerId = window.setTimeout(function () {
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var code, result, i, str;
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if (typeof window.editor === 'undefined') {
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code = document.getElementById('code').value;
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} else {
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code = window.editor.getValue();
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}
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// Executes f on the object and its children (recursively).
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function visit(object, f) {
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var key, child;
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if (f.call(null, object) === false) {
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return;
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}
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for (key in object) {
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if (object.hasOwnProperty(key)) {
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child = object[key];
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if (typeof child === 'object' && child !== null) {
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visit(child, f);
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}
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}
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}
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}
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function createRegex(pattern, mode) {
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var literal;
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try {
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literal = new RegExp(pattern, mode);
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} catch (e) {
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// Invalid regular expression.
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return;
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}
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return literal;
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}
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function collect(node) {
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var str, arg, value;
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if (node.type === 'Literal') {
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if (node.value instanceof RegExp) {
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str = node.value.toString();
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if (str[0] === '/') {
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result.push({
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type: 'Literal',
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value: node.value,
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line: node.loc.start.line,
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column: node.loc.start.column
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});
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}
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}
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}
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if (node.type === 'NewExpression' || node.type === 'CallExpression') {
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if (node.callee.type === 'Identifier' && node.callee.name === 'RegExp') {
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arg = node['arguments'];
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if (arg.length === 1 && arg[0].type === 'Literal') {
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if (typeof arg[0].value === 'string') {
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value = createRegex(arg[0].value);
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if (value) {
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result.push({
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type: 'Literal',
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value: value,
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line: node.loc.start.line,
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column: node.loc.start.column
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});
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}
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}
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}
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if (arg.length === 2 && arg[0].type === 'Literal' && arg[1].type === 'Literal') {
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if (typeof arg[0].value === 'string' && typeof arg[1].value === 'string') {
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value = createRegex(arg[0].value, arg[1].value);
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if (value) {
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result.push({
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type: 'Literal',
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value: value,
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line: node.loc.start.line,
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column: node.loc.start.column
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});
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}
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}
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}
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}
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}
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}
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try {
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result = [];
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visit(window.esprima.parse(code, { loc: true }), collect);
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if (result.length > 0) {
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str = '<p>Found <b>' + result.length + '</b> regex(s):</p>';
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for (i = 0; i < result.length; i += 1) {
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str += '<p>' + 'Line ' + result[i].line;
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str += ' column ' + (1 + result[i].column);
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str += ': <code>'; str += escaped(result[i].value.toString()) + '</code>';
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str += '</p>';
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}
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id('result').innerHTML = str;
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} else {
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setText('result', 'No regex.');
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}
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} catch (e) {
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setText('result', e.toString());
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}
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timerId = undefined;
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}, delay || 811);
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}
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setText('version', window.esprima.version);
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process(1);
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}
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/* vim: set sw=4 ts=4 et tw=80 : */
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