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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) {
- "use strict";
- var oop = require("../../lib/oop");
- var BaseFoldMode = require("./fold_mode").FoldMode;
- var Range = require("../../range").Range;
- var TokenIterator = require("../../token_iterator").TokenIterator;
- var FoldMode = exports.FoldMode = function() {};
- oop.inherits(FoldMode, BaseFoldMode);
- (function() {
- this.foldingStartMarker = /^\s*\\(begin)|(section|subsection|paragraph)\b|{\s*$/;
- this.foldingStopMarker = /^\s*\\(end)\b|^\s*}/;
- this.getFoldWidgetRange = function(session, foldStyle, row) {
- var line = session.doc.getLine(row);
- var match = this.foldingStartMarker.exec(line);
- if (match) {
- if (match[1])
- return this.latexBlock(session, row, match[0].length - 1);
- if (match[2])
- return this.latexSection(session, row, match[0].length - 1);
- return this.openingBracketBlock(session, "{", row, match.index);
- }
- var match = this.foldingStopMarker.exec(line);
- if (match) {
- if (match[1])
- return this.latexBlock(session, row, match[0].length - 1);
- return this.closingBracketBlock(session, "}", row, match.index + match[0].length);
- }
- };
- this.latexBlock = function(session, row, column) {
- var keywords = {
- "\\begin": 1,
- "\\end": -1
- };
- var stream = new TokenIterator(session, row, column);
- var token = stream.getCurrentToken();
- if (!token || !(token.type == "storage.type" || token.type == "constant.character.escape"))
- return;
- var val = token.value;
- var dir = keywords[val];
- var getType = function() {
- var token = stream.stepForward();
- var type = token.type == "lparen" ?stream.stepForward().value : "";
- if (dir === -1) {
- stream.stepBackward();
- if (type)
- stream.stepBackward();
- }
- return type;
- };
- var stack = [getType()];
- var startColumn = dir === -1 ? stream.getCurrentTokenColumn() : session.getLine(row).length;
- var startRow = row;
- stream.step = dir === -1 ? stream.stepBackward : stream.stepForward;
- while(token = stream.step()) {
- if (!token || !(token.type == "storage.type" || token.type == "constant.character.escape"))
- continue;
- var level = keywords[token.value];
- if (!level)
- continue;
- var type = getType();
- if (level === dir)
- stack.unshift(type);
- else if (stack.shift() !== type || !stack.length)
- break;
- }
- if (stack.length)
- return;
- var row = stream.getCurrentTokenRow();
- if (dir === -1)
- return new Range(row, session.getLine(row).length, startRow, startColumn);
- stream.stepBackward();
- return new Range(startRow, startColumn, row, stream.getCurrentTokenColumn());
- };
- this.latexSection = function(session, row, column) {
- var keywords = ["\\subsection", "\\section", "\\begin", "\\end", "\\paragraph"];
- var stream = new TokenIterator(session, row, column);
- var token = stream.getCurrentToken();
- if (!token || token.type != "storage.type")
- return;
- var startLevel = keywords.indexOf(token.value);
- var stackDepth = 0
- var endRow = row;
- while(token = stream.stepForward()) {
- if (token.type !== "storage.type")
- continue;
- var level = keywords.indexOf(token.value);
- if (level >= 2) {
- if (!stackDepth)
- endRow = stream.getCurrentTokenRow() - 1;
- stackDepth += level == 2 ? 1 : - 1;
- if (stackDepth < 0)
- break
- } else if (level >= startLevel)
- break;
- }
- if (!stackDepth)
- endRow = stream.getCurrentTokenRow() - 1;
- while (endRow > row && !/\S/.test(session.getLine(endRow)))
- endRow--;
- return new Range(
- row, session.getLine(row).length,
- endRow, session.getLine(endRow).length
- );
- };
- }).call(FoldMode.prototype);
- });
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