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642 lines
23 KiB
JavaScript
Executable file
642 lines
23 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 oop = require("./lib/oop");
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var EventEmitter = require("./lib/event_emitter").EventEmitter;
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var Range = require("./range").Range;
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var Anchor = require("./anchor").Anchor;
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/**
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* Contains the text of the document. Document can be attached to several [[EditSession `EditSession`]]s.
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*
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* At its core, `Document`s are just an array of strings, with each row in the document matching up to the array index.
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*
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* @class Document
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**/
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/**
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*
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* Creates a new `Document`. If `text` is included, the `Document` contains those strings; otherwise, it's empty.
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* @param {String | Array} text The starting text
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* @constructor
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**/
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var Document = function(text) {
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this.$lines = [];
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// There has to be one line at least in the document. If you pass an empty
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// string to the insert function, nothing will happen. Workaround.
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if (text.length == 0) {
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this.$lines = [""];
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} else if (Array.isArray(text)) {
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this._insertLines(0, text);
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} else {
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this.insert({row: 0, column:0}, text);
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}
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};
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(function() {
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oop.implement(this, EventEmitter);
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/**
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* Replaces all the lines in the current `Document` with the value of `text`.
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*
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* @param {String} text The text to use
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**/
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this.setValue = function(text) {
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var len = this.getLength();
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this.remove(new Range(0, 0, len, this.getLine(len-1).length));
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this.insert({row: 0, column:0}, text);
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};
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/**
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* Returns all the lines in the document as a single string, joined by the new line character.
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**/
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this.getValue = function() {
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return this.getAllLines().join(this.getNewLineCharacter());
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};
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/**
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* Creates a new `Anchor` to define a floating point in the document.
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* @param {Number} row The row number to use
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* @param {Number} column The column number to use
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*
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**/
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this.createAnchor = function(row, column) {
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return new Anchor(this, row, column);
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};
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/**
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* Splits a string of text on any newline (`\n`) or carriage-return ('\r') characters.
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*
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* @method $split
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* @param {String} text The text to work with
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* @returns {String} A String array, with each index containing a piece of the original `text` string.
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*
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**/
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// check for IE split bug
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if ("aaa".split(/a/).length == 0)
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this.$split = function(text) {
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return text.replace(/\r\n|\r/g, "\n").split("\n");
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}
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else
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this.$split = function(text) {
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return text.split(/\r\n|\r|\n/);
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};
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this.$detectNewLine = function(text) {
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var match = text.match(/^.*?(\r\n|\r|\n)/m);
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this.$autoNewLine = match ? match[1] : "\n";
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};
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/**
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* Returns the newline character that's being used, depending on the value of `newLineMode`.
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* @returns {String} If `newLineMode == windows`, `\r\n` is returned.
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* If `newLineMode == unix`, `\n` is returned.
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* If `newLineMode == auto`, the value of `autoNewLine` is returned.
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*
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**/
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this.getNewLineCharacter = function() {
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switch (this.$newLineMode) {
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case "windows":
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return "\r\n";
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case "unix":
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return "\n";
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default:
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return this.$autoNewLine;
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}
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};
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this.$autoNewLine = "\n";
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this.$newLineMode = "auto";
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/**
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* [Sets the new line mode.]{: #Document.setNewLineMode.desc}
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* @param {String} newLineMode [The newline mode to use; can be either `windows`, `unix`, or `auto`]{: #Document.setNewLineMode.param}
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*
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**/
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this.setNewLineMode = function(newLineMode) {
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if (this.$newLineMode === newLineMode)
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return;
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this.$newLineMode = newLineMode;
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};
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/**
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* [Returns the type of newlines being used; either `windows`, `unix`, or `auto`]{: #Document.getNewLineMode}
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* @returns {String}
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**/
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this.getNewLineMode = function() {
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return this.$newLineMode;
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};
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/**
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* Returns `true` if `text` is a newline character (either `\r\n`, `\r`, or `\n`).
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* @param {String} text The text to check
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*
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**/
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this.isNewLine = function(text) {
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return (text == "\r\n" || text == "\r" || text == "\n");
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};
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/**
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* Returns a verbatim copy of the given line as it is in the document
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* @param {Number} row The row index to retrieve
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*
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**/
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this.getLine = function(row) {
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return this.$lines[row] || "";
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};
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/**
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* Returns an array of strings of the rows between `firstRow` and `lastRow`. This function is inclusive of `lastRow`.
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* @param {Number} firstRow The first row index to retrieve
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* @param {Number} lastRow The final row index to retrieve
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*
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**/
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this.getLines = function(firstRow, lastRow) {
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return this.$lines.slice(firstRow, lastRow + 1);
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};
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/**
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* Returns all lines in the document as string array.
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**/
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this.getAllLines = function() {
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return this.getLines(0, this.getLength());
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};
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/**
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* Returns the number of rows in the document.
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**/
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this.getLength = function() {
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return this.$lines.length;
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};
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/**
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* [Given a range within the document, this function returns all the text within that range as a single string.]{: #Document.getTextRange.desc}
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* @param {Range} range The range to work with
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*
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* @returns {String}
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**/
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this.getTextRange = function(range) {
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if (range.start.row == range.end.row) {
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return this.getLine(range.start.row)
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.substring(range.start.column, range.end.column);
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}
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var lines = this.getLines(range.start.row, range.end.row);
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lines[0] = (lines[0] || "").substring(range.start.column);
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var l = lines.length - 1;
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if (range.end.row - range.start.row == l)
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lines[l] = lines[l].substring(0, range.end.column);
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return lines.join(this.getNewLineCharacter());
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};
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this.$clipPosition = function(position) {
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var length = this.getLength();
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if (position.row >= length) {
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position.row = Math.max(0, length - 1);
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position.column = this.getLine(length-1).length;
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} else if (position.row < 0)
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position.row = 0;
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return position;
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};
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/**
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* Inserts a block of `text` at the indicated `position`.
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* @param {Object} position The position to start inserting at; it's an object that looks like `{ row: row, column: column}`
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* @param {String} text A chunk of text to insert
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* @returns {Object} The position ({row, column}) of the last line of `text`. If the length of `text` is 0, this function simply returns `position`.
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*
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**/
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this.insert = function(position, text) {
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if (!text || text.length === 0)
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return position;
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position = this.$clipPosition(position);
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// only detect new lines if the document has no line break yet
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if (this.getLength() <= 1)
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this.$detectNewLine(text);
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var lines = this.$split(text);
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var firstLine = lines.splice(0, 1)[0];
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var lastLine = lines.length == 0 ? null : lines.splice(lines.length - 1, 1)[0];
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position = this.insertInLine(position, firstLine);
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if (lastLine !== null) {
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position = this.insertNewLine(position); // terminate first line
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position = this._insertLines(position.row, lines);
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position = this.insertInLine(position, lastLine || "");
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}
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return position;
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};
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/**
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* Fires whenever the document changes.
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*
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* Several methods trigger different `"change"` events. Below is a list of each action type, followed by each property that's also available:
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*
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* * `"insertLines"` (emitted by [[Document.insertLines]])
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* * `range`: the [[Range]] of the change within the document
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* * `lines`: the lines in the document that are changing
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* * `"insertText"` (emitted by [[Document.insertNewLine]])
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* * `range`: the [[Range]] of the change within the document
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* * `text`: the text that's being added
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* * `"removeLines"` (emitted by [[Document.insertLines]])
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* * `range`: the [[Range]] of the change within the document
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* * `lines`: the lines in the document that were removed
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* * `nl`: the new line character (as defined by [[Document.getNewLineCharacter]])
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* * `"removeText"` (emitted by [[Document.removeInLine]] and [[Document.removeNewLine]])
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* * `range`: the [[Range]] of the change within the document
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* * `text`: the text that's being removed
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*
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* @event change
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* @param {Object} e Contains at least one property called `"action"`. `"action"` indicates the action that triggered the change. Each action also has a set of additional properties.
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*
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**/
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/**
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* Inserts the elements in `lines` into the document, starting at the row index given by `row`. This method also triggers the `'change'` event.
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* @param {Number} row The index of the row to insert at
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* @param {Array} lines An array of strings
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* @returns {Object} Contains the final row and column, like this:
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* ```
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* {row: endRow, column: 0}
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* ```
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* If `lines` is empty, this function returns an object containing the current row, and column, like this:
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* ```
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* {row: row, column: 0}
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* ```
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*
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**/
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this.insertLines = function(row, lines) {
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if (row >= this.getLength())
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return this.insert({row: row, column: 0}, "\n" + lines.join("\n"));
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return this._insertLines(Math.max(row, 0), lines);
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};
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this._insertLines = function(row, lines) {
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if (lines.length == 0)
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return {row: row, column: 0};
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// apply doesn't work for big arrays (smallest threshold is on safari 0xFFFF)
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// to circumvent that we have to break huge inserts into smaller chunks here
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if (lines.length > 0xFFFF) {
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var end = this._insertLines(row, lines.slice(0xFFFF));
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lines = lines.slice(0, 0xFFFF);
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}
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var args = [row, 0];
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args.push.apply(args, lines);
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this.$lines.splice.apply(this.$lines, args);
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var range = new Range(row, 0, row + lines.length, 0);
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var delta = {
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action: "insertLines",
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range: range,
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lines: lines
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};
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this._emit("change", { data: delta });
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return end || range.end;
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};
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/**
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* Inserts a new line into the document at the current row's `position`. This method also triggers the `'change'` event.
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* @param {Object} position The position to insert at
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* @returns {Object} Returns an object containing the final row and column, like this:<br/>
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* ```
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* {row: endRow, column: 0}
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* ```
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*
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**/
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this.insertNewLine = function(position) {
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position = this.$clipPosition(position);
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var line = this.$lines[position.row] || "";
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this.$lines[position.row] = line.substring(0, position.column);
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this.$lines.splice(position.row + 1, 0, line.substring(position.column, line.length));
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var end = {
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row : position.row + 1,
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column : 0
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};
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var delta = {
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action: "insertText",
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range: Range.fromPoints(position, end),
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text: this.getNewLineCharacter()
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};
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this._emit("change", { data: delta });
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return end;
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};
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/**
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* Inserts `text` into the `position` at the current row. This method also triggers the `'change'` event.
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* @param {Object} position The position to insert at; it's an object that looks like `{ row: row, column: column}`
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* @param {String} text A chunk of text
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* @returns {Object} Returns an object containing the final row and column, like this:
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* ```
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* {row: endRow, column: 0}
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* ```
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*
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**/
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this.insertInLine = function(position, text) {
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if (text.length == 0)
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return position;
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var line = this.$lines[position.row] || "";
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this.$lines[position.row] = line.substring(0, position.column) + text
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+ line.substring(position.column);
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var end = {
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row : position.row,
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column : position.column + text.length
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};
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var delta = {
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action: "insertText",
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range: Range.fromPoints(position, end),
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text: text
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};
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this._emit("change", { data: delta });
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return end;
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};
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/**
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* Removes the `range` from the document.
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* @param {Range} range A specified Range to remove
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* @returns {Object} Returns the new `start` property of the range, which contains `startRow` and `startColumn`. If `range` is empty, this function returns the unmodified value of `range.start`.
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*
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**/
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this.remove = function(range) {
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if (!range instanceof Range)
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range = Range.fromPoints(range.start, range.end);
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// clip to document
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range.start = this.$clipPosition(range.start);
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range.end = this.$clipPosition(range.end);
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if (range.isEmpty())
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return range.start;
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var firstRow = range.start.row;
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var lastRow = range.end.row;
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if (range.isMultiLine()) {
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var firstFullRow = range.start.column == 0 ? firstRow : firstRow + 1;
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var lastFullRow = lastRow - 1;
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if (range.end.column > 0)
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this.removeInLine(lastRow, 0, range.end.column);
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if (lastFullRow >= firstFullRow)
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this._removeLines(firstFullRow, lastFullRow);
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if (firstFullRow != firstRow) {
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this.removeInLine(firstRow, range.start.column, this.getLine(firstRow).length);
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this.removeNewLine(range.start.row);
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}
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}
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else {
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this.removeInLine(firstRow, range.start.column, range.end.column);
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}
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return range.start;
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};
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/**
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* Removes the specified columns from the `row`. This method also triggers the `'change'` event.
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* @param {Number} row The row to remove from
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* @param {Number} startColumn The column to start removing at
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* @param {Number} endColumn The column to stop removing at
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* @returns {Object} Returns an object containing `startRow` and `startColumn`, indicating the new row and column values.<br/>If `startColumn` is equal to `endColumn`, this function returns nothing.
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*
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**/
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this.removeInLine = function(row, startColumn, endColumn) {
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if (startColumn == endColumn)
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return;
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var range = new Range(row, startColumn, row, endColumn);
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var line = this.getLine(row);
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var removed = line.substring(startColumn, endColumn);
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var newLine = line.substring(0, startColumn) + line.substring(endColumn, line.length);
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this.$lines.splice(row, 1, newLine);
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var delta = {
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action: "removeText",
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range: range,
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text: removed
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};
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this._emit("change", { data: delta });
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return range.start;
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};
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/**
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* Removes a range of full lines. This method also triggers the `'change'` event.
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* @param {Number} firstRow The first row to be removed
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* @param {Number} lastRow The last row to be removed
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* @returns {[String]} Returns all the removed lines.
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*
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**/
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this.removeLines = function(firstRow, lastRow) {
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if (firstRow < 0 || lastRow >= this.getLength())
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return this.remove(new Range(firstRow, 0, lastRow + 1, 0));
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return this._removeLines(firstRow, lastRow);
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};
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this._removeLines = function(firstRow, lastRow) {
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var range = new Range(firstRow, 0, lastRow + 1, 0);
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var removed = this.$lines.splice(firstRow, lastRow - firstRow + 1);
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var delta = {
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action: "removeLines",
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range: range,
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nl: this.getNewLineCharacter(),
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lines: removed
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};
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this._emit("change", { data: delta });
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return removed;
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};
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/**
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* Removes the new line between `row` and the row immediately following it. This method also triggers the `'change'` event.
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* @param {Number} row The row to check
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*
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**/
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this.removeNewLine = function(row) {
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var firstLine = this.getLine(row);
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var secondLine = this.getLine(row+1);
|
|
|
|
var range = new Range(row, firstLine.length, row+1, 0);
|
|
var line = firstLine + secondLine;
|
|
|
|
this.$lines.splice(row, 2, line);
|
|
|
|
var delta = {
|
|
action: "removeText",
|
|
range: range,
|
|
text: this.getNewLineCharacter()
|
|
};
|
|
this._emit("change", { data: delta });
|
|
};
|
|
|
|
/**
|
|
* Replaces a range in the document with the new `text`.
|
|
* @param {Range} range A specified Range to replace
|
|
* @param {String} text The new text to use as a replacement
|
|
* @returns {Object} Returns an object containing the final row and column, like this:
|
|
* {row: endRow, column: 0}
|
|
* If the text and range are empty, this function returns an object containing the current `range.start` value.
|
|
* If the text is the exact same as what currently exists, this function returns an object containing the current `range.end` value.
|
|
*
|
|
**/
|
|
this.replace = function(range, text) {
|
|
if (!range instanceof Range)
|
|
range = Range.fromPoints(range.start, range.end);
|
|
if (text.length == 0 && range.isEmpty())
|
|
return range.start;
|
|
|
|
// Shortcut: If the text we want to insert is the same as it is already
|
|
// in the document, we don't have to replace anything.
|
|
if (text == this.getTextRange(range))
|
|
return range.end;
|
|
|
|
this.remove(range);
|
|
if (text) {
|
|
var end = this.insert(range.start, text);
|
|
}
|
|
else {
|
|
end = range.start;
|
|
}
|
|
|
|
return end;
|
|
};
|
|
|
|
/**
|
|
* Applies all the changes previously accumulated. These can be either `'includeText'`, `'insertLines'`, `'removeText'`, and `'removeLines'`.
|
|
**/
|
|
this.applyDeltas = function(deltas) {
|
|
for (var i=0; i<deltas.length; i++) {
|
|
var delta = deltas[i];
|
|
var range = Range.fromPoints(delta.range.start, delta.range.end);
|
|
|
|
if (delta.action == "insertLines")
|
|
this.insertLines(range.start.row, delta.lines);
|
|
else if (delta.action == "insertText")
|
|
this.insert(range.start, delta.text);
|
|
else if (delta.action == "removeLines")
|
|
this._removeLines(range.start.row, range.end.row - 1);
|
|
else if (delta.action == "removeText")
|
|
this.remove(range);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Reverts any changes previously applied. These can be either `'includeText'`, `'insertLines'`, `'removeText'`, and `'removeLines'`.
|
|
**/
|
|
this.revertDeltas = function(deltas) {
|
|
for (var i=deltas.length-1; i>=0; i--) {
|
|
var delta = deltas[i];
|
|
|
|
var range = Range.fromPoints(delta.range.start, delta.range.end);
|
|
|
|
if (delta.action == "insertLines")
|
|
this._removeLines(range.start.row, range.end.row - 1);
|
|
else if (delta.action == "insertText")
|
|
this.remove(range);
|
|
else if (delta.action == "removeLines")
|
|
this._insertLines(range.start.row, delta.lines);
|
|
else if (delta.action == "removeText")
|
|
this.insert(range.start, delta.text);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Converts an index position in a document to a `{row, column}` object.
|
|
*
|
|
* Index refers to the "absolute position" of a character in the document. For example:
|
|
*
|
|
* ```javascript
|
|
* var x = 0; // 10 characters, plus one for newline
|
|
* var y = -1;
|
|
* ```
|
|
*
|
|
* Here, `y` is an index 15: 11 characters for the first row, and 5 characters until `y` in the second.
|
|
*
|
|
* @param {Number} index An index to convert
|
|
* @param {Number} startRow=0 The row from which to start the conversion
|
|
* @returns {Object} A `{row, column}` object of the `index` position
|
|
*/
|
|
this.indexToPosition = function(index, startRow) {
|
|
var lines = this.$lines || this.getAllLines();
|
|
var newlineLength = this.getNewLineCharacter().length;
|
|
for (var i = startRow || 0, l = lines.length; i < l; i++) {
|
|
index -= lines[i].length + newlineLength;
|
|
if (index < 0)
|
|
return {row: i, column: index + lines[i].length + newlineLength};
|
|
}
|
|
return {row: l-1, column: lines[l-1].length};
|
|
};
|
|
|
|
/**
|
|
* Converts the `{row, column}` position in a document to the character's index.
|
|
*
|
|
* Index refers to the "absolute position" of a character in the document. For example:
|
|
*
|
|
* ```javascript
|
|
* var x = 0; // 10 characters, plus one for newline
|
|
* var y = -1;
|
|
* ```
|
|
*
|
|
* Here, `y` is an index 15: 11 characters for the first row, and 5 characters until `y` in the second.
|
|
*
|
|
* @param {Object} pos The `{row, column}` to convert
|
|
* @param {Number} startRow=0 The row from which to start the conversion
|
|
* @returns {Number} The index position in the document
|
|
*/
|
|
this.positionToIndex = function(pos, startRow) {
|
|
var lines = this.$lines || this.getAllLines();
|
|
var newlineLength = this.getNewLineCharacter().length;
|
|
var index = 0;
|
|
var row = Math.min(pos.row, lines.length);
|
|
for (var i = startRow || 0; i < row; ++i)
|
|
index += lines[i].length + newlineLength;
|
|
|
|
return index + pos.column;
|
|
};
|
|
|
|
}).call(Document.prototype);
|
|
|
|
exports.Document = Document;
|
|
});
|