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- /* ***** BEGIN LICENSE BLOCK *****
- * Distributed under the BSD license:
- *
- * Copyright (c) 2012, Ajax.org B.V.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the name of Ajax.org B.V. nor the
- * names of its contributors may be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ***** END LICENSE BLOCK ***** */
- define(function(require, exports, module) {
- var Range = require("../range").Range;
-
- var splitRegex = /[^a-zA-Z_0-9\$\-\u00C0-\u1FFF\u2C00-\uD7FF\w]+/;
- var ignoreSqlCommentLines = false;
- function stripSqlComments(txt) {
- if (ignoreSqlCommentLines) {
- return txt.replace(/(--.*$|\/\*[\s\S]*?\*\/)/gm, ' ');
- }
- return txt;
- }
- function getWordIndex(doc, pos) {
- var textBefore = doc.getTextRange(Range.fromPoints({row: 0, column:0}, pos));
- return stripSqlComments(textBefore).split(splitRegex).length - 1;
- }
- /**
- * Does a distance analysis of the word `prefix` at position `pos` in `doc`.
- * @return Map
- */
- function wordDistance(doc, pos) {
- var prefixPos = getWordIndex(doc, pos);
- var words = stripSqlComments(doc.getValue()).split(splitRegex);
- var wordScores = Object.create(null);
-
- var currentWord = words[prefixPos];
- words.forEach(function(word, idx) {
- if (!word || word === currentWord) return;
- var distance = Math.abs(prefixPos - idx);
- var score = words.length - distance;
- if (wordScores[word]) {
- wordScores[word] = Math.max(score, wordScores[word]);
- } else {
- wordScores[word] = score;
- }
- });
- return wordScores;
- }
- exports.setSqlMode = function(sqlMode) {
- ignoreSqlCommentLines = sqlMode;
- };
- exports.getCompletions = function(editor, session, pos, prefix, callback) {
- var wordScore = wordDistance(session, pos, prefix);
- var wordList = Object.keys(wordScore);
- callback(null, wordList.map(function(word) {
- return {
- caption: word,
- value: word,
- score: wordScore[word],
- meta: "local"
- };
- }));
- };
- });
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