79 lines
3.2 KiB
JavaScript
79 lines
3.2 KiB
JavaScript
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/* ***** BEGIN LICENSE BLOCK *****
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* Distributed under the BSD license:
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*
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* Copyright (c) 2012, 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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var Range = require("../range").Range;
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var splitRegex = /[^a-zA-Z_0-9\$\-\u00C0-\u1FFF\u2C00-\uD7FF\w]+/;
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function getWordIndex(doc, pos) {
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var textBefore = doc.getTextRange(Range.fromPoints({row: 0, column:0}, pos));
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return textBefore.split(splitRegex).length - 1;
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}
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/**
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* Does a distance analysis of the word `prefix` at position `pos` in `doc`.
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* @return Map
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*/
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function wordDistance(doc, pos) {
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var prefixPos = getWordIndex(doc, pos);
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var words = doc.getValue().split(splitRegex);
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var wordScores = Object.create(null);
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var currentWord = words[prefixPos];
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words.forEach(function(word, idx) {
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if (!word || word === currentWord) return;
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var distance = Math.abs(prefixPos - idx);
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var score = words.length - distance;
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if (wordScores[word]) {
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wordScores[word] = Math.max(score, wordScores[word]);
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} else {
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wordScores[word] = score;
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}
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});
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return wordScores;
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}
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exports.getCompletions = function(editor, session, pos, prefix, callback) {
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var wordScore = wordDistance(session, pos);
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var wordList = Object.keys(wordScore);
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callback(null, wordList.map(function(word) {
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return {
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caption: word,
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value: word,
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score: wordScore[word],
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meta: "local"
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};
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}));
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};
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});
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