big-moving.ru/api/soft/ajaxorg/lib/ace/placeholder.js

263 lines
8.9 KiB
JavaScript
Executable File

/* ***** BEGIN LICENSE BLOCK *****
* Distributed under the BSD license:
*
* Copyright (c) 2010, 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 Range = require("./range").Range;
var EventEmitter = require("./lib/event_emitter").EventEmitter;
var oop = require("./lib/oop");
/**
* @class PlaceHolder
*
**/
/**
* - session (Document): The document to associate with the anchor
* - length (Number): The starting row position
* - pos (Number): The starting column position
* - others (String):
* - mainClass (String):
* - othersClass (String):
*
* @constructor
**/
var PlaceHolder = function(session, length, pos, others, mainClass, othersClass) {
var _self = this;
this.length = length;
this.session = session;
this.doc = session.getDocument();
this.mainClass = mainClass;
this.othersClass = othersClass;
this.$onUpdate = this.onUpdate.bind(this);
this.doc.on("change", this.$onUpdate);
this.$others = others;
this.$onCursorChange = function() {
setTimeout(function() {
_self.onCursorChange();
});
};
this.$pos = pos;
// Used for reset
var undoStack = session.getUndoManager().$undoStack || session.getUndoManager().$undostack || {length: -1};
this.$undoStackDepth = undoStack.length;
this.setup();
session.selection.on("changeCursor", this.$onCursorChange);
};
(function() {
oop.implement(this, EventEmitter);
/**
* PlaceHolder.setup()
*
* TODO
*
**/
this.setup = function() {
var _self = this;
var doc = this.doc;
var session = this.session;
this.selectionBefore = session.selection.toJSON();
if (session.selection.inMultiSelectMode)
session.selection.toSingleRange();
this.pos = doc.createAnchor(this.$pos.row, this.$pos.column);
var pos = this.pos;
pos.$insertRight = true;
pos.detach();
pos.markerId = session.addMarker(new Range(pos.row, pos.column, pos.row, pos.column + this.length), this.mainClass, null, false);
this.others = [];
this.$others.forEach(function(other) {
var anchor = doc.createAnchor(other.row, other.column);
anchor.$insertRight = true;
anchor.detach();
_self.others.push(anchor);
});
session.setUndoSelect(false);
};
/**
* PlaceHolder.showOtherMarkers()
*
* TODO
*
**/
this.showOtherMarkers = function() {
if (this.othersActive) return;
var session = this.session;
var _self = this;
this.othersActive = true;
this.others.forEach(function(anchor) {
anchor.markerId = session.addMarker(new Range(anchor.row, anchor.column, anchor.row, anchor.column+_self.length), _self.othersClass, null, false);
});
};
/**
* PlaceHolder.hideOtherMarkers()
*
* Hides all over markers in the [[EditSession `EditSession`]] that are not the currently selected one.
*
**/
this.hideOtherMarkers = function() {
if (!this.othersActive) return;
this.othersActive = false;
for (var i = 0; i < this.others.length; i++) {
this.session.removeMarker(this.others[i].markerId);
}
};
/**
* PlaceHolder@onUpdate(e)
*
* Emitted when the place holder updates.
*
**/
this.onUpdate = function(delta) {
if (this.$updating)
return this.updateAnchors(delta);
var range = delta;
if (range.start.row !== range.end.row) return;
if (range.start.row !== this.pos.row) return;
this.$updating = true;
var lengthDiff = delta.action === "insert" ? range.end.column - range.start.column : range.start.column - range.end.column;
var inMainRange = range.start.column >= this.pos.column && range.start.column <= this.pos.column + this.length + 1;
var distanceFromStart = range.start.column - this.pos.column;
this.updateAnchors(delta);
if (inMainRange)
this.length += lengthDiff;
if (inMainRange && !this.session.$fromUndo) {
if (delta.action === 'insert') {
for (var i = this.others.length - 1; i >= 0; i--) {
var otherPos = this.others[i];
var newPos = {row: otherPos.row, column: otherPos.column + distanceFromStart};
this.doc.insertMergedLines(newPos, delta.lines);
}
} else if (delta.action === 'remove') {
for (var i = this.others.length - 1; i >= 0; i--) {
var otherPos = this.others[i];
var newPos = {row: otherPos.row, column: otherPos.column + distanceFromStart};
this.doc.remove(new Range(newPos.row, newPos.column, newPos.row, newPos.column - lengthDiff));
}
}
}
this.$updating = false;
this.updateMarkers();
};
this.updateAnchors = function(delta) {
this.pos.onChange(delta);
for (var i = this.others.length; i--;)
this.others[i].onChange(delta);
this.updateMarkers();
};
this.updateMarkers = function() {
if (this.$updating)
return;
var _self = this;
var session = this.session;
var updateMarker = function(pos, className) {
session.removeMarker(pos.markerId);
pos.markerId = session.addMarker(new Range(pos.row, pos.column, pos.row, pos.column+_self.length), className, null, false);
};
updateMarker(this.pos, this.mainClass);
for (var i = this.others.length; i--;)
updateMarker(this.others[i], this.othersClass);
};
/**
* PlaceHolder@onCursorChange(e)
*
* Emitted when the cursor changes.
*
**/
this.onCursorChange = function(event) {
if (this.$updating || !this.session) return;
var pos = this.session.selection.getCursor();
if (pos.row === this.pos.row && pos.column >= this.pos.column && pos.column <= this.pos.column + this.length) {
this.showOtherMarkers();
this._emit("cursorEnter", event);
} else {
this.hideOtherMarkers();
this._emit("cursorLeave", event);
}
};
/**
* PlaceHolder.detach()
*
* TODO
*
**/
this.detach = function() {
this.session.removeMarker(this.pos && this.pos.markerId);
this.hideOtherMarkers();
this.doc.removeEventListener("change", this.$onUpdate);
this.session.selection.removeEventListener("changeCursor", this.$onCursorChange);
this.session.setUndoSelect(true);
this.session = null;
};
/**
* PlaceHolder.cancel()
*
* TODO
*
**/
this.cancel = function() {
if (this.$undoStackDepth === -1)
return;
var undoManager = this.session.getUndoManager();
var undosRequired = (undoManager.$undoStack || undoManager.$undostack).length - this.$undoStackDepth;
for (var i = 0; i < undosRequired; i++) {
undoManager.undo(this.session, true);
}
if (this.selectionBefore)
this.session.selection.fromJSON(this.selectionBefore);
};
}).call(PlaceHolder.prototype);
exports.PlaceHolder = PlaceHolder;
});