Files
atom/HTML/ace/virtual_renderer.js
2011-08-27 00:14:44 -07:00

844 lines
27 KiB
JavaScript

/* vim:ts=4:sts=4:sw=4:
* ***** 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@ajax.org>
* Irakli Gozalishvili <rfobic@gmail.com> (http://jeditoolkit.com)
* Julian Viereck <julian.viereck@gmail.com>
*
* 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) {
var oop = require("pilot/oop");
var dom = require("pilot/dom");
var event = require("pilot/event");
var useragent = require("pilot/useragent");
var GutterLayer = require("ace/layer/gutter").Gutter;
var MarkerLayer = require("ace/layer/marker").Marker;
var TextLayer = require("ace/layer/text").Text;
var CursorLayer = require("ace/layer/cursor").Cursor;
var ScrollBar = require("ace/scrollbar").ScrollBar;
var RenderLoop = require("ace/renderloop").RenderLoop;
var EventEmitter = require("pilot/event_emitter").EventEmitter;
var editorCss = require("ace/requirejs/text!ace/css/editor.css");
// import CSS once
dom.importCssString(editorCss);
var VirtualRenderer = function(container, theme) {
this.container = container;
dom.addCssClass(this.container, "ace_editor");
this.setTheme(theme);
this.$gutter = dom.createElement("div");
this.$gutter.className = "ace_gutter";
this.container.appendChild(this.$gutter);
this.scroller = dom.createElement("div");
this.scroller.className = "ace_scroller";
this.container.appendChild(this.scroller);
this.content = dom.createElement("div");
this.content.className = "ace_content";
this.scroller.appendChild(this.content);
this.$gutterLayer = new GutterLayer(this.$gutter);
this.$markerBack = new MarkerLayer(this.content);
var textLayer = this.$textLayer = new TextLayer(this.content);
this.canvas = textLayer.element;
this.$markerFront = new MarkerLayer(this.content);
this.characterWidth = textLayer.getCharacterWidth();
this.lineHeight = textLayer.getLineHeight();
this.$cursorLayer = new CursorLayer(this.content);
this.$cursorPadding = 8;
// Indicates whether the horizontal scrollbar is visible
this.$horizScroll = true;
this.$horizScrollAlwaysVisible = true;
this.scrollBar = new ScrollBar(container);
this.scrollBar.addEventListener("scroll", this.onScroll.bind(this));
this.scrollTop = 0;
this.cursorPos = {
row : 0,
column : 0
};
var _self = this;
this.$textLayer.addEventListener("changeCharaterSize", function() {
_self.characterWidth = textLayer.getCharacterWidth();
_self.lineHeight = textLayer.getLineHeight();
_self.$updatePrintMargin();
_self.onResize(true);
_self.$loop.schedule(_self.CHANGE_FULL);
});
event.addListener(this.$gutter, "click", this.$onGutterClick.bind(this));
event.addListener(this.$gutter, "dblclick", this.$onGutterClick.bind(this));
this.$size = {
width: 0,
height: 0,
scrollerHeight: 0,
scrollerWidth: 0
};
this.layerConfig = {
width : 1,
padding : 0,
firstRow : 0,
firstRowScreen: 0,
lastRow : 0,
lineHeight : 1,
characterWidth : 1,
minHeight : 1,
maxHeight : 1,
offset : 0,
height : 1
};
this.$loop = new RenderLoop(this.$renderChanges.bind(this));
this.$loop.schedule(this.CHANGE_FULL);
this.setPadding(4);
this.$updatePrintMargin();
};
(function() {
this.showGutter = true;
this.CHANGE_CURSOR = 1;
this.CHANGE_MARKER = 2;
this.CHANGE_GUTTER = 4;
this.CHANGE_SCROLL = 8;
this.CHANGE_LINES = 16;
this.CHANGE_TEXT = 32;
this.CHANGE_SIZE = 64;
this.CHANGE_MARKER_BACK = 128;
this.CHANGE_MARKER_FRONT = 256;
this.CHANGE_FULL = 512;
oop.implement(this, EventEmitter);
this.setSession = function(session) {
this.session = session;
this.$cursorLayer.setSession(session);
this.$markerBack.setSession(session);
this.$markerFront.setSession(session);
this.$gutterLayer.setSession(session);
this.$textLayer.setSession(session);
this.$loop.schedule(this.CHANGE_FULL);
};
/**
* Triggers partial update of the text layer
*/
this.updateLines = function(firstRow, lastRow) {
if (lastRow === undefined)
lastRow = Infinity;
if (!this.$changedLines) {
this.$changedLines = {
firstRow: firstRow,
lastRow: lastRow
};
}
else {
if (this.$changedLines.firstRow > firstRow)
this.$changedLines.firstRow = firstRow;
if (this.$changedLines.lastRow < lastRow)
this.$changedLines.lastRow = lastRow;
}
this.$loop.schedule(this.CHANGE_LINES);
};
/**
* Triggers full update of the text layer
*/
this.updateText = function() {
this.$loop.schedule(this.CHANGE_TEXT);
};
/**
* Triggers a full update of all layers
*/
this.updateFull = function() {
this.$loop.schedule(this.CHANGE_FULL);
};
this.updateFontSize = function() {
this.$textLayer.checkForSizeChanges();
};
/**
* Triggers resize of the editor
*/
this.onResize = function(force) {
var changes = this.CHANGE_SIZE;
var size = this.$size;
var height = dom.getInnerHeight(this.container);
if (force || size.height != height) {
size.height = height;
this.scroller.style.height = height + "px";
size.scrollerHeight = this.scroller.clientHeight;
this.scrollBar.setHeight(size.scrollerHeight);
if (this.session) {
this.scrollToY(this.getScrollTop());
changes = changes | this.CHANGE_FULL;
}
}
var width = dom.getInnerWidth(this.container);
if (force || size.width != width) {
size.width = width;
var gutterWidth = this.showGutter ? this.$gutter.offsetWidth : 0;
this.scroller.style.left = gutterWidth + "px";
size.scrollerWidth = Math.max(0, width - gutterWidth - this.scrollBar.getWidth())
this.scroller.style.width = size.scrollerWidth + "px";
if (this.session.getUseWrapMode() && this.adjustWrapLimit() || force)
changes = changes | this.CHANGE_FULL;
}
this.$loop.schedule(changes);
};
this.adjustWrapLimit = function(){
var availableWidth = this.$size.scrollerWidth - this.$padding * 2;
var limit = Math.floor(availableWidth / this.characterWidth) - 1;
return this.session.adjustWrapLimit(limit);
};
this.$onGutterClick = function(e) {
var pageX = event.getDocumentX(e);
var pageY = event.getDocumentY(e);
this._dispatchEvent("gutter" + e.type, {
row: this.screenToTextCoordinates(pageX, pageY).row,
htmlEvent: e
});
};
this.setShowInvisibles = function(showInvisibles) {
if (this.$textLayer.setShowInvisibles(showInvisibles))
this.$loop.schedule(this.CHANGE_TEXT);
};
this.getShowInvisibles = function() {
return this.$textLayer.showInvisibles;
};
this.$showPrintMargin = true;
this.setShowPrintMargin = function(showPrintMargin) {
this.$showPrintMargin = showPrintMargin;
this.$updatePrintMargin();
};
this.getShowPrintMargin = function() {
return this.$showPrintMargin;
};
this.$printMarginColumn = 80;
this.setPrintMarginColumn = function(showPrintMargin) {
this.$printMarginColumn = showPrintMargin;
this.$updatePrintMargin();
};
this.getPrintMarginColumn = function() {
return this.$printMarginColumn;
};
this.getShowGutter = function(){
return this.showGutter;
};
this.setShowGutter = function(show){
if(this.showGutter === show)
return;
this.$gutter.style.display = show ? "block" : "none";
this.showGutter = show;
this.onResize(true);
};
this.$updatePrintMargin = function() {
var containerEl;
if (!this.$showPrintMargin && !this.$printMarginEl)
return;
if (!this.$printMarginEl) {
containerEl = dom.createElement("div");
containerEl.className = "ace_print_margin_layer";
this.$printMarginEl = dom.createElement("div");
this.$printMarginEl.className = "ace_print_margin";
containerEl.appendChild(this.$printMarginEl);
this.content.insertBefore(containerEl, this.$textLayer.element);
}
var style = this.$printMarginEl.style;
style.left = ((this.characterWidth * this.$printMarginColumn) + this.$padding * 2) + "px";
style.visibility = this.$showPrintMargin ? "visible" : "hidden";
};
this.getContainerElement = function() {
return this.container;
};
this.getMouseEventTarget = function() {
return this.content;
};
this.getTextAreaContainer = function() {
return this.container;
};
this.moveTextAreaToCursor = function(textarea) {
// in IE the native cursor always shines through
// this persists in IE9
if (useragent.isIE)
return;
var pos = this.$cursorLayer.getPixelPosition();
if (!pos)
return;
var bounds = this.content.getBoundingClientRect();
var offset = this.layerConfig.offset;
textarea.style.left = (bounds.left + pos.left + this.$padding) + "px";
textarea.style.top = (bounds.top + pos.top - this.scrollTop + offset) + "px";
};
this.getFirstVisibleRow = function() {
return this.layerConfig.firstRow;
};
this.getFirstFullyVisibleRow = function() {
return this.layerConfig.firstRow + (this.layerConfig.offset === 0 ? 0 : 1);
};
this.getLastFullyVisibleRow = function() {
var flint = Math.floor((this.layerConfig.height + this.layerConfig.offset) / this.layerConfig.lineHeight);
return this.layerConfig.firstRow - 1 + flint;
};
this.getLastVisibleRow = function() {
return this.layerConfig.lastRow;
};
this.$padding = null;
this.setPadding = function(padding) {
this.$padding = padding;
this.$textLayer.setPadding(padding);
this.$cursorLayer.setPadding(padding);
this.$markerFront.setPadding(padding);
this.$markerBack.setPadding(padding);
this.$loop.schedule(this.CHANGE_FULL);
this.$updatePrintMargin();
};
this.getHScrollBarAlwaysVisible = function() {
return this.$horizScrollAlwaysVisible;
};
this.setHScrollBarAlwaysVisible = function(alwaysVisible) {
if (this.$horizScrollAlwaysVisible != alwaysVisible) {
this.$horizScrollAlwaysVisible = alwaysVisible;
if (!this.$horizScrollAlwaysVisible || !this.$horizScroll)
this.$loop.schedule(this.CHANGE_SCROLL);
}
};
this.onScroll = function(e) {
this.scrollToY(e.data);
};
this.$updateScrollBar = function() {
this.scrollBar.setInnerHeight(this.layerConfig.maxHeight);
this.scrollBar.setScrollTop(this.scrollTop);
};
this.$renderChanges = function(changes) {
if (!changes || !this.session)
return;
// text, scrolling and resize changes can cause the view port size to change
if (changes & this.CHANGE_FULL ||
changes & this.CHANGE_SIZE ||
changes & this.CHANGE_TEXT ||
changes & this.CHANGE_LINES ||
changes & this.CHANGE_SCROLL
)
this.$computeLayerConfig();
// full
if (changes & this.CHANGE_FULL) {
this.$textLayer.update(this.layerConfig);
if (this.showGutter)
this.$gutterLayer.update(this.layerConfig);
this.$markerBack.update(this.layerConfig);
this.$markerFront.update(this.layerConfig);
this.$cursorLayer.update(this.layerConfig);
this.$updateScrollBar();
return;
}
// scrolling
if (changes & this.CHANGE_SCROLL) {
if (changes & this.CHANGE_TEXT || changes & this.CHANGE_LINES)
this.$textLayer.update(this.layerConfig);
else
this.$textLayer.scrollLines(this.layerConfig);
if (this.showGutter)
this.$gutterLayer.update(this.layerConfig);
this.$markerBack.update(this.layerConfig);
this.$markerFront.update(this.layerConfig);
this.$cursorLayer.update(this.layerConfig);
this.$updateScrollBar();
return;
}
if (changes & this.CHANGE_TEXT) {
this.$textLayer.update(this.layerConfig);
if (this.showGutter)
this.$gutterLayer.update(this.layerConfig);
}
else if (changes & this.CHANGE_LINES) {
this.$updateLines();
this.$updateScrollBar();
if (this.showGutter)
this.$gutterLayer.update(this.layerConfig);
} else if (changes & this.CHANGE_GUTTER) {
if (this.showGutter)
this.$gutterLayer.update(this.layerConfig);
}
if (changes & this.CHANGE_CURSOR)
this.$cursorLayer.update(this.layerConfig);
if (changes & (this.CHANGE_MARKER | this.CHANGE_MARKER_FRONT)) {
this.$markerFront.update(this.layerConfig);
}
if (changes & (this.CHANGE_MARKER | this.CHANGE_MARKER_BACK)) {
this.$markerBack.update(this.layerConfig);
}
if (changes & this.CHANGE_SIZE)
this.$updateScrollBar();
};
this.$computeLayerConfig = function() {
var session = this.session;
var offset = this.scrollTop % this.lineHeight;
var minHeight = this.$size.scrollerHeight + this.lineHeight;
var longestLine = this.$getLongestLine();
var widthChanged = this.layerConfig.width != longestLine;
var horizScroll = this.$horizScrollAlwaysVisible || this.$size.scrollerWidth - longestLine < 0;
var horizScrollChanged = this.$horizScroll !== horizScroll;
this.$horizScroll = horizScroll;
if (horizScrollChanged)
this.scroller.style.overflowX = horizScroll ? "scroll" : "hidden";
var maxHeight = this.session.getScreenLength() * this.lineHeight;
this.scrollTop = Math.max(0, Math.min(this.scrollTop, maxHeight - this.$size.scrollerHeight));
var lineCount = Math.ceil(minHeight / this.lineHeight) - 1;
var firstRow = Math.max(0, Math.round((this.scrollTop - offset) / this.lineHeight));
var lastRow = firstRow + lineCount;
// Map lines on the screen to lines in the document.
var firstRowScreen, firstRowHeight;
var lineHeight = { lineHeight: this.lineHeight };
firstRow = session.screenToDocumentRow(firstRow, 0);
// Check if firstRow is inside of a foldLine. If true, then use the first
// row of the foldLine.
var foldLine = session.getFoldLine(firstRow);
if (foldLine) {
firstRow = foldLine.start.row;
}
firstRowScreen = session.documentToScreenRow(firstRow, 0);
firstRowHeight = session.getRowHeight(lineHeight, firstRow);
lastRow = Math.min(session.screenToDocumentRow(lastRow, 0), session.getLength() - 1);
minHeight = this.$size.scrollerHeight + session.getRowHeight(lineHeight, lastRow)+
firstRowHeight;
offset = this.scrollTop - firstRowScreen * this.lineHeight;
this.layerConfig = {
width : longestLine,
padding : this.$padding,
firstRow : firstRow,
firstRowScreen: firstRowScreen,
lastRow : lastRow,
lineHeight : this.lineHeight,
characterWidth : this.characterWidth,
minHeight : minHeight,
maxHeight : maxHeight,
offset : offset,
height : this.$size.scrollerHeight
};
// For debugging.
// console.log(JSON.stringify(this.layerConfig));
this.$gutterLayer.element.style.marginTop = (-offset) + "px";
this.content.style.marginTop = (-offset) + "px";
this.content.style.width = longestLine + "px";
this.content.style.height = minHeight + "px";
// scroller.scrollWidth was smaller than scrollLeft we needed
if (this.$desiredScrollLeft) {
this.scrollToX(this.$desiredScrollLeft);
this.$desiredScrollLeft = 0;
}
// Horizontal scrollbar visibility may have changed, which changes
// the client height of the scroller
if (horizScrollChanged)
this.onResize(true);
};
this.$updateLines = function() {
var firstRow = this.$changedLines.firstRow;
var lastRow = this.$changedLines.lastRow;
this.$changedLines = null;
var layerConfig = this.layerConfig;
// if the update changes the width of the document do a full redraw
if (layerConfig.width != this.$getLongestLine())
return this.$textLayer.update(layerConfig);
if (firstRow > layerConfig.lastRow + 1) { return; }
if (lastRow < layerConfig.firstRow) { return; }
// if the last row is unknown -> redraw everything
if (lastRow === Infinity) {
if (this.showGutter)
this.$gutterLayer.update(layerConfig);
this.$textLayer.update(layerConfig);
return;
}
// else update only the changed rows
this.$textLayer.updateLines(layerConfig, firstRow, lastRow);
};
this.$getLongestLine = function() {
var charCount = this.session.getScreenWidth() + 1;
if (this.$textLayer.showInvisibles)
charCount += 1;
return Math.max(this.$size.scrollerWidth, Math.round(charCount * this.characterWidth));
};
this.updateFrontMarkers = function() {
this.$markerFront.setMarkers(this.session.getMarkers(true));
this.$loop.schedule(this.CHANGE_MARKER_FRONT);
};
this.updateBackMarkers = function() {
this.$markerBack.setMarkers(this.session.getMarkers());
this.$loop.schedule(this.CHANGE_MARKER_BACK);
};
this.addGutterDecoration = function(row, className){
this.$gutterLayer.addGutterDecoration(row, className);
this.$loop.schedule(this.CHANGE_GUTTER);
};
this.removeGutterDecoration = function(row, className){
this.$gutterLayer.removeGutterDecoration(row, className);
this.$loop.schedule(this.CHANGE_GUTTER);
};
this.setBreakpoints = function(rows) {
this.$gutterLayer.setBreakpoints(rows);
this.$loop.schedule(this.CHANGE_GUTTER);
};
this.setAnnotations = function(annotations) {
this.$gutterLayer.setAnnotations(annotations);
this.$loop.schedule(this.CHANGE_GUTTER);
};
this.updateCursor = function() {
this.$loop.schedule(this.CHANGE_CURSOR);
};
this.hideCursor = function() {
this.$cursorLayer.hideCursor();
};
this.showCursor = function() {
this.$cursorLayer.showCursor();
};
this.scrollCursorIntoView = function() {
// the editor is not visible
if (this.$size.scrollerHeight === 0)
return;
var pos = this.$cursorLayer.getPixelPosition();
var left = pos.left + this.$padding;
var top = pos.top;
if (this.scrollTop > top) {
this.scrollToY(top);
}
if (this.scrollTop + this.$size.scrollerHeight < top + this.lineHeight) {
this.scrollToY(top + this.lineHeight - this.$size.scrollerHeight);
}
var scrollLeft = this.scroller.scrollLeft;
if (scrollLeft > left) {
this.scrollToX(left);
}
if (scrollLeft + this.$size.scrollerWidth < left + this.characterWidth) {
if (left > this.layerConfig.width)
this.$desiredScrollLeft = left + 2 * this.characterWidth;
else
this.scrollToX(Math.round(left + this.characterWidth - this.$size.scrollerWidth));
}
};
this.getScrollTop = function() {
return this.scrollTop;
};
this.getScrollLeft = function() {
return this.scroller.scrollLeft;
};
this.getScrollTopRow = function() {
return this.scrollTop / this.lineHeight;
};
this.getScrollBottomRow = function() {
return Math.max(0, Math.floor((this.scrollTop + this.$size.scrollerHeight) / this.lineHeight) - 1);
};
this.scrollToRow = function(row) {
this.scrollToY(row * this.lineHeight);
};
this.scrollToLine = function(line, center) {
var lineHeight = { lineHeight: this.lineHeight };
var offset = 0;
for (var l = 1; l < line; l++) {
offset += this.session.getRowHeight(lineHeight, l-1);
}
if (center) {
offset -= this.$size.scrollerHeight / 2;
}
this.scrollToY(offset);
};
this.scrollToY = function(scrollTop) {
// after calling scrollBar.setScrollTop
// scrollbar sends us event with same scrollTop. ignore it
scrollTop = Math.max(0, scrollTop);
if (this.scrollTop !== scrollTop) {
this.$loop.schedule(this.CHANGE_SCROLL);
this.scrollTop = scrollTop;
}
};
this.scrollToX = function(scrollLeft) {
if (scrollLeft <= this.$padding)
scrollLeft = 0;
this.scroller.scrollLeft = scrollLeft;
};
this.scrollBy = function(deltaX, deltaY) {
deltaY && this.scrollToY(this.scrollTop + deltaY);
deltaX && this.scrollToX(this.scroller.scrollLeft + deltaX);
};
this.isScrollableBy = function(deltaX, deltaY) {
if (deltaY < 0 && this.scrollTop > 0)
return true;
if (deltaY > 0 && this.scrollTop + this.$size.scrollerHeight < this.layerConfig.maxHeight)
return true;
// todo: handle horizontal scrolling
};
this.screenToTextCoordinates = function(pageX, pageY) {
var canvasPos = this.scroller.getBoundingClientRect();
var col = Math.round((pageX + this.scroller.scrollLeft - canvasPos.left - this.$padding - dom.getPageScrollLeft())
/ this.characterWidth);
var row = Math.floor((pageY + this.scrollTop - canvasPos.top - dom.getPageScrollTop())
/ this.lineHeight);
return this.session.screenToDocumentPosition(row, Math.max(col, 0));
};
this.textToScreenCoordinates = function(row, column) {
var canvasPos = this.scroller.getBoundingClientRect();
var pos = this.session.documentToScreenPosition(row, column);
var x = this.$padding + Math.round(pos.column * this.characterWidth);
var y = pos.row * this.lineHeight;
return {
pageX: canvasPos.left + x - this.getScrollLeft(),
pageY: canvasPos.top + y - this.getScrollTop()
};
};
this.visualizeFocus = function() {
dom.addCssClass(this.container, "ace_focus");
};
this.visualizeBlur = function() {
dom.removeCssClass(this.container, "ace_focus");
};
this.showComposition = function(position) {
if (!this.$composition) {
this.$composition = dom.createElement("div");
this.$composition.className = "ace_composition";
this.content.appendChild(this.$composition);
}
this.$composition.innerHTML = "&#160;";
var pos = this.$cursorLayer.getPixelPosition();
var style = this.$composition.style;
style.top = pos.top + "px";
style.left = (pos.left + this.$padding) + "px";
style.height = this.lineHeight + "px";
this.hideCursor();
};
this.setCompositionText = function(text) {
dom.setInnerText(this.$composition, text);
};
this.hideComposition = function() {
this.showCursor();
if (!this.$composition)
return;
var style = this.$composition.style;
style.top = "-10000px";
style.left = "-10000px";
};
this.setTheme = function(theme) {
var _self = this;
this.$themeValue = theme;
if (!theme || typeof theme == "string") {
theme = theme || "ace/theme/textmate";
require([theme], function(theme) {
afterLoad(theme);
});
} else {
afterLoad(theme);
}
function afterLoad(theme) {
if (_self.$theme)
dom.removeCssClass(_self.container, _self.$theme);
_self.$theme = theme ? theme.cssClass : null;
if (_self.$theme)
dom.addCssClass(_self.container, _self.$theme);
// force re-measure of the gutter width
if (_self.$size) {
_self.$size.width = 0;
_self.onResize();
}
}
};
this.getTheme = function() {
return this.$themeValue;
};
// Methods allows to add / remove CSS classnames to the editor element.
// This feature can be used by plug-ins to provide a visual indication of
// a certain mode that editor is in.
this.setStyle = function setStyle(style) {
dom.addCssClass(this.container, style);
};
this.unsetStyle = function unsetStyle(style) {
dom.removeCssClass(this.container, style);
};
this.destroy = function() {
this.$textLayer.destroy();
this.$cursorLayer.destroy();
};
}).call(VirtualRenderer.prototype);
exports.VirtualRenderer = VirtualRenderer;
});