109 lines
4.7 KiB
JavaScript
Executable File
109 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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function throwDeltaError(delta, errorText){
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console.log("Invalid Delta:", delta);
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throw "Invalid Delta: " + errorText;
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}
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function positionInDocument(docLines, position) {
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return position.row >= 0 && position.row < docLines.length &&
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position.column >= 0 && position.column <= docLines[position.row].length;
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}
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function validateDelta(docLines, delta) {
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// Validate action string.
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if (delta.action != "insert" && delta.action != "remove")
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throwDeltaError(delta, "delta.action must be 'insert' or 'remove'");
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// Validate lines type.
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if (!(delta.lines instanceof Array))
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throwDeltaError(delta, "delta.lines must be an Array");
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// Validate range type.
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if (!delta.start || !delta.end)
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throwDeltaError(delta, "delta.start/end must be an present");
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// Validate that the start point is contained in the document.
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var start = delta.start;
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if (!positionInDocument(docLines, delta.start))
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throwDeltaError(delta, "delta.start must be contained in document");
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// Validate that the end point is contained in the document (remove deltas only).
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var end = delta.end;
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if (delta.action == "remove" && !positionInDocument(docLines, end))
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throwDeltaError(delta, "delta.end must contained in document for 'remove' actions");
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// Validate that the .range size matches the .lines size.
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var numRangeRows = end.row - start.row;
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var numRangeLastLineChars = (end.column - (numRangeRows == 0 ? start.column : 0));
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if (numRangeRows != delta.lines.length - 1 || delta.lines[numRangeRows].length != numRangeLastLineChars)
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throwDeltaError(delta, "delta.range must match delta lines");
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}
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exports.applyDelta = function(docLines, delta, doNotValidate) {
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// disabled validation since it breaks autocompletion popup
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// if (!doNotValidate)
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// validateDelta(docLines, delta);
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var row = delta.start.row;
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var startColumn = delta.start.column;
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var line = docLines[row] || "";
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switch (delta.action) {
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case "insert":
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var lines = delta.lines;
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if (lines.length === 1) {
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docLines[row] = line.substring(0, startColumn) + delta.lines[0] + line.substring(startColumn);
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} else {
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var args = [row, 1].concat(delta.lines);
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docLines.splice.apply(docLines, args);
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docLines[row] = line.substring(0, startColumn) + docLines[row];
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docLines[row + delta.lines.length - 1] += line.substring(startColumn);
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}
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break;
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case "remove":
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var endColumn = delta.end.column;
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var endRow = delta.end.row;
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if (row === endRow) {
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docLines[row] = line.substring(0, startColumn) + line.substring(endColumn);
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} else {
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docLines.splice(
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row, endRow - row + 1,
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line.substring(0, startColumn) + docLines[endRow].substring(endColumn)
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);
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}
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break;
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}
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};
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});
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