mirror of
https://github.com/overleaf/overleaf.git
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234 lines
8.4 KiB
JavaScript
Executable file
234 lines
8.4 KiB
JavaScript
Executable file
/* ***** BEGIN LICENSE BLOCK *****
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* Distributed under the BSD license:
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*
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* Copyright (c) 2010, Ajax.org B.V.
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* All rights reserved.
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*
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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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* * Neither the name of Ajax.org B.V. nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. 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 THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ***** END LICENSE BLOCK ***** */
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define(function(require, exports, module) {
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"use strict";
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var lang = require("../lib/lang");
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var TextHighlightRules = function() {
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// regexp must not have capturing parentheses
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// regexps are ordered -> the first match is used
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this.$rules = {
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"start" : [{
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token : "empty_line",
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regex : '^$'
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}, {
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defaultToken : "text"
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}]
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};
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};
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(function() {
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this.addRules = function(rules, prefix) {
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if (!prefix) {
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for (var key in rules)
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this.$rules[key] = rules[key];
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return;
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}
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for (var key in rules) {
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var state = rules[key];
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for (var i = 0; i < state.length; i++) {
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var rule = state[i];
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if (rule.next) {
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if (typeof rule.next != "string") {
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if (rule.nextState && rule.nextState.indexOf(prefix) !== 0)
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rule.nextState = prefix + rule.nextState;
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} else {
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if (rule.next.indexOf(prefix) !== 0)
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rule.next = prefix + rule.next;
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}
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}
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}
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this.$rules[prefix + key] = state;
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}
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};
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this.getRules = function() {
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return this.$rules;
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};
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this.embedRules = function (HighlightRules, prefix, escapeRules, states, append) {
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var embedRules = new HighlightRules().getRules();
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if (states) {
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for (var i = 0; i < states.length; i++)
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states[i] = prefix + states[i];
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} else {
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states = [];
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for (var key in embedRules)
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states.push(prefix + key);
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}
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this.addRules(embedRules, prefix);
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if (escapeRules) {
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var addRules = Array.prototype[append ? "push" : "unshift"];
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for (var i = 0; i < states.length; i++)
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addRules.apply(this.$rules[states[i]], lang.deepCopy(escapeRules));
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}
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if (!this.$embeds)
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this.$embeds = [];
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this.$embeds.push(prefix);
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};
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this.getEmbeds = function() {
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return this.$embeds;
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};
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var pushState = function(currentState, stack) {
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if (currentState != "start")
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stack.unshift(this.nextState, currentState);
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return this.nextState;
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};
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var popState = function(currentState, stack) {
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if (stack[0] !== currentState)
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return "start";
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stack.shift();
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return stack.shift();
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};
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this.normalizeRules = function() {
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var id = 0;
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var rules = this.$rules;
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function processState(key) {
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var state = rules[key];
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state.processed = true;
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for (var i = 0; i < state.length; i++) {
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var rule = state[i];
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if (!rule.regex && rule.start) {
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rule.regex = rule.start;
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if (!rule.next)
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rule.next = [];
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rule.next.push({
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defaultToken: rule.token
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}, {
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token: rule.token + ".end",
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regex: rule.end || rule.start,
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next: "pop"
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});
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rule.token = rule.token + ".start";
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rule.push = true;
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}
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var next = rule.next || rule.push;
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if (next && Array.isArray(next)) {
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var stateName = rule.stateName;
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if (!stateName) {
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stateName = rule.token;
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if (typeof stateName != "string")
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stateName = stateName[0] || "";
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if (rules[stateName])
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stateName += id++;
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}
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rules[stateName] = next;
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rule.next = stateName;
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processState(stateName);
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} else if (next == "pop") {
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rule.next = popState;
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}
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if (rule.push) {
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rule.nextState = rule.next || rule.push;
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rule.next = pushState;
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delete rule.push;
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}
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if (rule.rules) {
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for (var r in rule.rules) {
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if (rules[r]) {
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if (rules[r].push)
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rules[r].push.apply(rules[r], rule.rules[r]);
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} else {
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rules[r] = rule.rules[r];
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}
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}
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}
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if (rule.include || typeof rule == "string") {
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var includeName = rule.include || rule;
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var toInsert = rules[includeName];
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} else if (Array.isArray(rule))
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toInsert = rule;
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if (toInsert) {
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var args = [i, 1].concat(toInsert);
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if (rule.noEscape)
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args = args.filter(function(x) {return !x.next;});
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state.splice.apply(state, args);
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// skip included rules since they are already processed
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//i += args.length - 3;
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i--;
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toInsert = null
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}
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if (rule.keywordMap) {
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rule.token = this.createKeywordMapper(
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rule.keywordMap, rule.defaultToken || "text", rule.caseInsensitive
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);
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delete rule.defaultToken;
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}
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}
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};
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Object.keys(rules).forEach(processState, this);
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};
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this.createKeywordMapper = function(map, defaultToken, ignoreCase, splitChar) {
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var keywords = Object.create(null);
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Object.keys(map).forEach(function(className) {
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var a = map[className];
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if (ignoreCase)
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a = a.toLowerCase();
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var list = a.split(splitChar || "|");
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for (var i = list.length; i--; )
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keywords[list[i]] = className;
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});
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// in old versions of opera keywords["__proto__"] sets prototype
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// even on objects with __proto__=null
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if (Object.getPrototypeOf(keywords)) {
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keywords.__proto__ = null;
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}
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this.$keywordList = Object.keys(keywords);
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map = null;
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return ignoreCase
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? function(value) {return keywords[value.toLowerCase()] || defaultToken }
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: function(value) {return keywords[value] || defaultToken };
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}
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this.getKeywords = function() {
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return this.$keywords;
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};
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}).call(TextHighlightRules.prototype);
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exports.TextHighlightRules = TextHighlightRules;
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});
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