mirror of
https://github.com/pulsar-edit/pulsar.git
synced 2024-09-22 00:19:24 +03:00
194 lines
6.3 KiB
JavaScript
194 lines
6.3 KiB
JavaScript
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is Ajax.org Code Editor (ACE).
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Ajax.org B.V.
|
|
* Portions created by the Initial Developer are Copyright (C) 2010
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Fabian Jakobs <fabian AT ajax DOT org>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
define(function(require, exports, module) {
|
|
"use strict";
|
|
|
|
var oop = require("./lib/oop");
|
|
var EventEmitter = require("./lib/event_emitter").EventEmitter;
|
|
|
|
/**
|
|
* An Anchor is a floating pointer in the document. Whenever text is inserted or
|
|
* deleted before the cursor, the position of the cursor is updated
|
|
*/
|
|
var Anchor = exports.Anchor = function(doc, row, column) {
|
|
this.document = doc;
|
|
|
|
if (typeof column == "undefined")
|
|
this.setPosition(row.row, row.column);
|
|
else
|
|
this.setPosition(row, column);
|
|
|
|
this.$onChange = this.onChange.bind(this);
|
|
doc.on("change", this.$onChange);
|
|
};
|
|
|
|
(function() {
|
|
|
|
oop.implement(this, EventEmitter);
|
|
|
|
this.getPosition = function() {
|
|
return this.$clipPositionToDocument(this.row, this.column);
|
|
};
|
|
|
|
this.getDocument = function() {
|
|
return this.document;
|
|
};
|
|
|
|
this.onChange = function(e) {
|
|
var delta = e.data;
|
|
var range = delta.range;
|
|
|
|
if (range.start.row == range.end.row && range.start.row != this.row)
|
|
return;
|
|
|
|
if (range.start.row > this.row)
|
|
return;
|
|
|
|
if (range.start.row == this.row && range.start.column > this.column)
|
|
return;
|
|
|
|
var row = this.row;
|
|
var column = this.column;
|
|
|
|
if (delta.action === "insertText") {
|
|
if (range.start.row === row && range.start.column <= column) {
|
|
if (range.start.row === range.end.row) {
|
|
column += range.end.column - range.start.column;
|
|
}
|
|
else {
|
|
column -= range.start.column;
|
|
row += range.end.row - range.start.row;
|
|
}
|
|
}
|
|
else if (range.start.row !== range.end.row && range.start.row < row) {
|
|
row += range.end.row - range.start.row;
|
|
}
|
|
} else if (delta.action === "insertLines") {
|
|
if (range.start.row <= row) {
|
|
row += range.end.row - range.start.row;
|
|
}
|
|
}
|
|
else if (delta.action == "removeText") {
|
|
if (range.start.row == row && range.start.column < column) {
|
|
if (range.end.column >= column)
|
|
column = range.start.column;
|
|
else
|
|
column = Math.max(0, column - (range.end.column - range.start.column));
|
|
|
|
} else if (range.start.row !== range.end.row && range.start.row < row) {
|
|
if (range.end.row == row) {
|
|
column = Math.max(0, column - range.end.column) + range.start.column;
|
|
}
|
|
row -= (range.end.row - range.start.row);
|
|
}
|
|
else if (range.end.row == row) {
|
|
row -= range.end.row - range.start.row;
|
|
column = Math.max(0, column - range.end.column) + range.start.column;
|
|
}
|
|
} else if (delta.action == "removeLines") {
|
|
if (range.start.row <= row) {
|
|
if (range.end.row <= row)
|
|
row -= range.end.row - range.start.row;
|
|
else {
|
|
row = range.start.row;
|
|
column = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
this.setPosition(row, column, true);
|
|
};
|
|
|
|
this.setPosition = function(row, column, noClip) {
|
|
var pos;
|
|
if (noClip) {
|
|
pos = {
|
|
row: row,
|
|
column: column
|
|
};
|
|
}
|
|
else {
|
|
pos = this.$clipPositionToDocument(row, column);
|
|
}
|
|
|
|
if (this.row == pos.row && this.column == pos.column)
|
|
return;
|
|
|
|
var old = {
|
|
row: this.row,
|
|
column: this.column
|
|
};
|
|
|
|
this.row = pos.row;
|
|
this.column = pos.column;
|
|
this._emit("change", {
|
|
old: old,
|
|
value: pos
|
|
});
|
|
};
|
|
|
|
this.detach = function() {
|
|
this.document.removeEventListener("change", this.$onChange);
|
|
};
|
|
|
|
this.$clipPositionToDocument = function(row, column) {
|
|
var pos = {};
|
|
|
|
if (row >= this.document.getLength()) {
|
|
pos.row = Math.max(0, this.document.getLength() - 1);
|
|
pos.column = this.document.getLine(pos.row).length;
|
|
}
|
|
else if (row < 0) {
|
|
pos.row = 0;
|
|
pos.column = 0;
|
|
}
|
|
else {
|
|
pos.row = row;
|
|
pos.column = Math.min(this.document.getLine(pos.row).length, Math.max(0, column));
|
|
}
|
|
|
|
if (column < 0)
|
|
pos.column = 0;
|
|
|
|
return pos;
|
|
};
|
|
|
|
}).call(Anchor.prototype);
|
|
|
|
});
|