141 lines
4.7 KiB
JavaScript
Executable File
141 lines
4.7 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 Range = require("../range").Range;
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var RangeList = require("../range_list").RangeList;
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var oop = require("../lib/oop");
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/*
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* Simple fold-data struct.
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**/
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var Fold = exports.Fold = function(range, placeholder) {
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this.foldLine = null;
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this.placeholder = placeholder;
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this.range = range;
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this.start = range.start;
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this.end = range.end;
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this.sameRow = range.start.row == range.end.row;
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this.subFolds = this.ranges = [];
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};
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oop.inherits(Fold, RangeList);
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(function() {
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this.toString = function() {
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return '"' + this.placeholder + '" ' + this.range.toString();
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};
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this.setFoldLine = function(foldLine) {
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this.foldLine = foldLine;
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this.subFolds.forEach(function(fold) {
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fold.setFoldLine(foldLine);
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});
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};
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this.clone = function() {
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var range = this.range.clone();
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var fold = new Fold(range, this.placeholder);
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this.subFolds.forEach(function(subFold) {
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fold.subFolds.push(subFold.clone());
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});
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fold.collapseChildren = this.collapseChildren;
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return fold;
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};
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this.addSubFold = function(fold) {
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if (this.range.isEqual(fold))
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return;
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if (!this.range.containsRange(fold))
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throw new Error("A fold can't intersect already existing fold" + fold.range + this.range);
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// transform fold to local coordinates
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consumeRange(fold, this.start);
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var row = fold.start.row, column = fold.start.column;
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for (var i = 0, cmp = -1; i < this.subFolds.length; i++) {
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cmp = this.subFolds[i].range.compare(row, column);
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if (cmp != 1)
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break;
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}
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var afterStart = this.subFolds[i];
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if (cmp == 0)
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return afterStart.addSubFold(fold);
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// cmp == -1
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var row = fold.range.end.row, column = fold.range.end.column;
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for (var j = i, cmp = -1; j < this.subFolds.length; j++) {
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cmp = this.subFolds[j].range.compare(row, column);
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if (cmp != 1)
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break;
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}
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var afterEnd = this.subFolds[j];
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if (cmp == 0)
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throw new Error("A fold can't intersect already existing fold" + fold.range + this.range);
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var consumedFolds = this.subFolds.splice(i, j - i, fold);
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fold.setFoldLine(this.foldLine);
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return fold;
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};
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this.restoreRange = function(range) {
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return restoreRange(range, this.start);
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};
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}).call(Fold.prototype);
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function consumePoint(point, anchor) {
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point.row -= anchor.row;
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if (point.row == 0)
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point.column -= anchor.column;
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}
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function consumeRange(range, anchor) {
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consumePoint(range.start, anchor);
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consumePoint(range.end, anchor);
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}
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function restorePoint(point, anchor) {
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if (point.row == 0)
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point.column += anchor.column;
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point.row += anchor.row;
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}
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function restoreRange(range, anchor) {
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restorePoint(range.start, anchor);
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restorePoint(range.end, anchor);
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}
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});
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