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slick.grid.js
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slick.grid.js
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/**
* @license
* (c) 2009-2016 Michael Leibman
* michael{dot}leibman{at}gmail{dot}com
* http://github.com/mleibman/slickgrid
*
* Distributed under MIT license.
* All rights reserved.
*
* SlickGrid v2.4
*
* NOTES:
* Cell/row DOM manipulations are done directly bypassing jQuery's DOM manipulation methods.
* This increases the speed dramatically, but can only be done safely because there are no event handlers
* or data associated with any cell/row DOM nodes. Cell editors must make sure they implement .destroy()
* and do proper cleanup.
*/
// make sure required JavaScript modules are loaded
if (typeof jQuery === "undefined") {
throw new Error("SlickGrid requires jquery module to be loaded");
}
if (!jQuery.fn.drag) {
throw new Error("SlickGrid requires jquery.event.drag module to be loaded");
}
if (typeof Slick === "undefined") {
throw new Error("slick.core.js not loaded");
}
(function ($) {
"use strict";
// shared across all grids on the page
var scrollbarDimensions;
var maxSupportedCssHeight; // browser's breaking point
//////////////////////////////////////////////////////////////////////////////////////////////
// SlickGrid class implementation (available as Slick.Grid)
/**
* Creates a new instance of the grid.
* @class SlickGrid
* @constructor
* @param {Node} container Container node to create the grid in.
* @param {Array,Object} data An array of objects for databinding.
* @param {Array} columns An array of column definitions.
* @param {Object} options Grid options.
**/
function SlickGrid(container, data, columns, options) {
// settings
var defaults = {
alwaysShowVerticalScroll: false,
alwaysAllowHorizontalScroll: false,
explicitInitialization: false,
rowHeight: 25,
defaultColumnWidth: 80,
enableAddRow: false,
leaveSpaceForNewRows: false,
editable: false,
autoEdit: true,
suppressActiveCellChangeOnEdit: false,
enableCellNavigation: true,
enableColumnReorder: true,
asyncEditorLoading: false,
asyncEditorLoadDelay: 100,
forceFitColumns: false,
enableAsyncPostRender: false,
asyncPostRenderDelay: 50,
enableAsyncPostRenderCleanup: false,
asyncPostRenderCleanupDelay: 40,
autoHeight: false,
editorLock: Slick.GlobalEditorLock,
showColumnHeader: true,
showHeaderRow: false,
headerRowHeight: 25,
createFooterRow: false,
showFooterRow: false,
footerRowHeight: 25,
createPreHeaderPanel: false,
showPreHeaderPanel: false,
preHeaderPanelHeight: 25,
showTopPanel: false,
topPanelHeight: 25,
formatterFactory: null,
editorFactory: null,
cellFlashingCssClass: "flashing",
selectedCellCssClass: "selected",
multiSelect: true,
enableTextSelectionOnCells: false,
dataItemColumnValueExtractor: null,
frozenBottom: false,
frozenColumn: -1,
frozenRow: -1,
frozenRightViewportMinWidth: 100,
fullWidthRows: false,
multiColumnSort: false,
numberedMultiColumnSort: false,
tristateMultiColumnSort: false,
sortColNumberInSeparateSpan: false,
defaultFormatter: defaultFormatter,
forceSyncScrolling: false,
addNewRowCssClass: "new-row",
preserveCopiedSelectionOnPaste: false,
showCellSelection: true,
viewportClass: null,
minRowBuffer: 3,
emulatePagingWhenScrolling: true, // when scrolling off bottom of viewport, place new row at top of viewport
editorCellNavOnLRKeys: false,
enableMouseWheelScrollHandler: true,
doPaging: true,
autosizeColsMode: Slick.GridAutosizeColsMode.LegacyOff,
autosizeColPaddingPx: 4,
autosizeTextAvgToMWidthRatio: 0.75,
viewportSwitchToScrollModeWidthPercent: undefined,
viewportMinWidthPx: undefined,
viewportMaxWidthPx: undefined,
suppressCssChangesOnHiddenInit: false
};
var columnDefaults = {
name: "",
resizable: true,
sortable: false,
minWidth: 30,
maxWidth: undefined,
rerenderOnResize: false,
headerCssClass: null,
defaultSortAsc: true,
focusable: true,
selectable: true,
};
var columnAutosizeDefaults = {
ignoreHeaderText: false,
colValueArray: undefined,
allowAddlPercent: undefined,
formatterOverride: undefined,
autosizeMode: Slick.ColAutosizeMode.ContentIntelligent,
rowSelectionModeOnInit: undefined,
rowSelectionMode: Slick.RowSelectionMode.FirstNRows,
rowSelectionCount: 100,
valueFilterMode: Slick.ValueFilterMode.None,
widthEvalMode: Slick.WidthEvalMode.CanvasTextSize,
sizeToRemaining: undefined,
widthPx: undefined,
colDataTypeOf: undefined
};
// scroller
var th; // virtual height
var h; // real scrollable height
var ph; // page height
var n; // number of pages
var cj; // "jumpiness" coefficient
var page = 0; // current page
var offset = 0; // current page offset
var vScrollDir = 1;
// private
var initialized = false;
var $container;
var uid = "slickgrid_" + Math.round(1000000 * Math.random());
var self = this;
var $focusSink, $focusSink2;
var $groupHeaders = $();
var $headerScroller;
var $headers;
var $headerRow, $headerRowScroller, $headerRowSpacerL, $headerRowSpacerR;
var $footerRow, $footerRowScroller, $footerRowSpacerL, $footerRowSpacerR;
var $preHeaderPanel, $preHeaderPanelScroller, $preHeaderPanelSpacer;
var $preHeaderPanelR, $preHeaderPanelScrollerR, $preHeaderPanelSpacerR;
var $topPanelScroller;
var $topPanel;
var $viewport;
var $canvas;
var $style;
var $boundAncestors;
var treeColumns;
var stylesheet, columnCssRulesL, columnCssRulesR;
var viewportH, viewportW;
var canvasWidth, canvasWidthL, canvasWidthR;
var headersWidth, headersWidthL, headersWidthR;
var viewportHasHScroll, viewportHasVScroll;
var headerColumnWidthDiff = 0, headerColumnHeightDiff = 0, // border+padding
cellWidthDiff = 0, cellHeightDiff = 0, jQueryNewWidthBehaviour = false;
var absoluteColumnMinWidth;
var hasFrozenRows = false;
var frozenRowsHeight = 0;
var actualFrozenRow = -1;
var paneTopH = 0;
var paneBottomH = 0;
var viewportTopH = 0;
var viewportBottomH = 0;
var topPanelH = 0;
var headerRowH = 0;
var footerRowH = 0;
var tabbingDirection = 1;
var $activeCanvasNode;
var $activeViewportNode;
var activePosX;
var activeRow, activeCell;
var activeCellNode = null;
var currentEditor = null;
var serializedEditorValue;
var editController;
var rowsCache = {};
var renderedRows = 0;
var numVisibleRows = 0;
var prevScrollTop = 0;
var scrollTop = 0;
var lastRenderedScrollTop = 0;
var lastRenderedScrollLeft = 0;
var prevScrollLeft = 0;
var scrollLeft = 0;
var selectionModel;
var selectedRows = [];
var plugins = [];
var cellCssClasses = {};
var columnsById = {};
var sortColumns = [];
var columnPosLeft = [];
var columnPosRight = [];
var pagingActive = false;
var pagingIsLastPage = false;
var scrollThrottle = ActionThrottle(render, 50);
// async call handles
var h_editorLoader = null;
var h_render = null;
var h_postrender = null;
var h_postrenderCleanup = null;
var postProcessedRows = {};
var postProcessToRow = null;
var postProcessFromRow = null;
var postProcessedCleanupQueue = [];
var postProcessgroupId = 0;
// perf counters
var counter_rows_rendered = 0;
var counter_rows_removed = 0;
var $paneHeaderL;
var $paneHeaderR;
var $paneTopL;
var $paneTopR;
var $paneBottomL;
var $paneBottomR;
var $headerScrollerL;
var $headerScrollerR;
var $headerL;
var $headerR;
var $groupHeadersL;
var $groupHeadersR;
var $headerRowScrollerL;
var $headerRowScrollerR;
var $footerRowScrollerL;
var $footerRowScrollerR;
var $headerRowL;
var $headerRowR;
var $footerRowL;
var $footerRowR;
var $topPanelScrollerL;
var $topPanelScrollerR;
var $topPanelL;
var $topPanelR;
var $viewportTopL;
var $viewportTopR;
var $viewportBottomL;
var $viewportBottomR;
var $canvasTopL;
var $canvasTopR;
var $canvasBottomL;
var $canvasBottomR;
var $viewportScrollContainerX;
var $viewportScrollContainerY;
var $headerScrollContainer;
var $headerRowScrollContainer;
var $footerRowScrollContainer;
// store css attributes if display:none is active in container or parent
var cssShow = { position: 'absolute', visibility: 'hidden', display: 'block' };
var $hiddenParents;
var oldProps = [];
var columnResizeDragging = false;
//////////////////////////////////////////////////////////////////////////////////////////////
// Initialization
function init() {
if (container instanceof jQuery) {
$container = container;
} else {
$container = $(container);
}
if ($container.length < 1) {
throw new Error("SlickGrid requires a valid container, " + container + " does not exist in the DOM.");
}
// calculate these only once and share between grid instances
maxSupportedCssHeight = maxSupportedCssHeight || getMaxSupportedCssHeight();
options = $.extend({}, defaults, options);
validateAndEnforceOptions();
columnDefaults.width = options.defaultColumnWidth;
if (!options.suppressCssChangesOnHiddenInit) { cacheCssForHiddenInit(); }
treeColumns = new Slick.TreeColumns(columns);
columns = treeColumns.extractColumns();
updateColumnProps();
// validate loaded JavaScript modules against requested options
if (options.enableColumnReorder && !$.fn.sortable) {
throw new Error("SlickGrid's 'enableColumnReorder = true' option requires jquery-ui.sortable module to be loaded");
}
editController = {
"commitCurrentEdit": commitCurrentEdit,
"cancelCurrentEdit": cancelCurrentEdit
};
$container
.empty()
.css("overflow", "hidden")
.css("outline", 0)
.addClass(uid)
.addClass("ui-widget");
// set up a positioning container if needed
if (!(/relative|absolute|fixed/).test($container.css("position"))) {
$container.css("position", "relative");
}
$focusSink = $("<div tabIndex='0' hideFocus style='position:fixed;width:0;height:0;top:0;left:0;outline:0;'></div>").appendTo($container);
// Containers used for scrolling frozen columns and rows
$paneHeaderL = $("<div class='slick-pane slick-pane-header slick-pane-left' tabIndex='0' />").appendTo($container);
$paneHeaderR = $("<div class='slick-pane slick-pane-header slick-pane-right' tabIndex='0' />").appendTo($container);
$paneTopL = $("<div class='slick-pane slick-pane-top slick-pane-left' tabIndex='0' />").appendTo($container);
$paneTopR = $("<div class='slick-pane slick-pane-top slick-pane-right' tabIndex='0' />").appendTo($container);
$paneBottomL = $("<div class='slick-pane slick-pane-bottom slick-pane-left' tabIndex='0' />").appendTo($container);
$paneBottomR = $("<div class='slick-pane slick-pane-bottom slick-pane-right' tabIndex='0' />").appendTo($container);
if (options.createPreHeaderPanel) {
$preHeaderPanelScroller = $("<div class='slick-preheader-panel ui-state-default' style='overflow:hidden;position:relative;' />").appendTo($paneHeaderL);
$preHeaderPanel = $("<div />").appendTo($preHeaderPanelScroller);
$preHeaderPanelSpacer = $("<div style='display:block;height:1px;position:absolute;top:0;left:0;'></div>")
.appendTo($preHeaderPanelScroller);
$preHeaderPanelScrollerR = $("<div class='slick-preheader-panel ui-state-default' style='overflow:hidden;position:relative;' />").appendTo($paneHeaderR);
$preHeaderPanelR = $("<div />").appendTo($preHeaderPanelScrollerR);
$preHeaderPanelSpacerR = $("<div style='display:block;height:1px;position:absolute;top:0;left:0;'></div>")
.appendTo($preHeaderPanelScrollerR);
if (!options.showPreHeaderPanel) {
$preHeaderPanelScroller.hide();
$preHeaderPanelScrollerR.hide();
}
}
// Append the header scroller containers
$headerScrollerL = $("<div class='slick-header ui-state-default slick-header-left' />").appendTo($paneHeaderL);
$headerScrollerR = $("<div class='slick-header ui-state-default slick-header-right' />").appendTo($paneHeaderR);
// Cache the header scroller containers
$headerScroller = $().add($headerScrollerL).add($headerScrollerR);
if (treeColumns.hasDepth()) {
$groupHeadersL = [];
$groupHeadersR = [];
for (var index = 0; index < treeColumns.getDepth() - 1; index++) {
$groupHeadersL[index] = $("<div class='slick-group-header-columns slick-group-header-columns-left' style='left:-1000px' />").appendTo($headerScrollerL);
$groupHeadersR[index] = $("<div class='slick-group-header-columns slick-group-header-columns-right' style='left:-1000px' />").appendTo($headerScrollerR);
}
$groupHeaders = $().add($groupHeadersL).add($groupHeadersR);
}
// Append the columnn containers to the headers
$headerL = $("<div class='slick-header-columns slick-header-columns-left' style='left:-1000px' />").appendTo($headerScrollerL);
$headerR = $("<div class='slick-header-columns slick-header-columns-right' style='left:-1000px' />").appendTo($headerScrollerR);
// Cache the header columns
$headers = $().add($headerL).add($headerR);
$headerRowScrollerL = $("<div class='slick-headerrow ui-state-default' />").appendTo($paneTopL);
$headerRowScrollerR = $("<div class='slick-headerrow ui-state-default' />").appendTo($paneTopR);
$headerRowScroller = $().add($headerRowScrollerL).add($headerRowScrollerR);
$headerRowSpacerL = $("<div style='display:block;height:1px;position:absolute;top:0;left:0;'></div>")
.appendTo($headerRowScrollerL);
$headerRowSpacerR = $("<div style='display:block;height:1px;position:absolute;top:0;left:0;'></div>")
.appendTo($headerRowScrollerR);
$headerRowL = $("<div class='slick-headerrow-columns slick-headerrow-columns-left' />").appendTo($headerRowScrollerL);
$headerRowR = $("<div class='slick-headerrow-columns slick-headerrow-columns-right' />").appendTo($headerRowScrollerR);
$headerRow = $().add($headerRowL).add($headerRowR);
// Append the top panel scroller
$topPanelScrollerL = $("<div class='slick-top-panel-scroller ui-state-default' />").appendTo($paneTopL);
$topPanelScrollerR = $("<div class='slick-top-panel-scroller ui-state-default' />").appendTo($paneTopR);
$topPanelScroller = $().add($topPanelScrollerL).add($topPanelScrollerR);
// Append the top panel
$topPanelL = $("<div class='slick-top-panel' style='width:10000px' />").appendTo($topPanelScrollerL);
$topPanelR = $("<div class='slick-top-panel' style='width:10000px' />").appendTo($topPanelScrollerR);
$topPanel = $().add($topPanelL).add($topPanelR);
if (!options.showColumnHeader) {
$headerScroller.hide();
}
if (!options.showTopPanel) {
$topPanelScroller.hide();
}
if (!options.showHeaderRow) {
$headerRowScroller.hide();
}
// Append the viewport containers
$viewportTopL = $("<div class='slick-viewport slick-viewport-top slick-viewport-left' tabIndex='0' hideFocus />").appendTo($paneTopL);
$viewportTopR = $("<div class='slick-viewport slick-viewport-top slick-viewport-right' tabIndex='0' hideFocus />").appendTo($paneTopR);
$viewportBottomL = $("<div class='slick-viewport slick-viewport-bottom slick-viewport-left' tabIndex='0' hideFocus />").appendTo($paneBottomL);
$viewportBottomR = $("<div class='slick-viewport slick-viewport-bottom slick-viewport-right' tabIndex='0' hideFocus />").appendTo($paneBottomR);
// Cache the viewports
$viewport = $().add($viewportTopL).add($viewportTopR).add($viewportBottomL).add($viewportBottomR);
// Default the active viewport to the top left
$activeViewportNode = $viewportTopL;
// Append the canvas containers
$canvasTopL = $("<div class='grid-canvas grid-canvas-top grid-canvas-left' tabIndex='0' hideFocus />").appendTo($viewportTopL);
$canvasTopR = $("<div class='grid-canvas grid-canvas-top grid-canvas-right' tabIndex='0' hideFocus />").appendTo($viewportTopR);
$canvasBottomL = $("<div class='grid-canvas grid-canvas-bottom grid-canvas-left' tabIndex='0' hideFocus />").appendTo($viewportBottomL);
$canvasBottomR = $("<div class='grid-canvas grid-canvas-bottom grid-canvas-right' tabIndex='0' hideFocus />").appendTo($viewportBottomR);
if (options.viewportClass) $viewport.toggleClass(options.viewportClass, true);
// Cache the canvases
$canvas = $().add($canvasTopL).add($canvasTopR).add($canvasBottomL).add($canvasBottomR);
scrollbarDimensions = scrollbarDimensions || measureScrollbar();
// Default the active canvas to the top left
$activeCanvasNode = $canvasTopL;
// pre-header
if ($preHeaderPanelSpacer) $preHeaderPanelSpacer.css("width", getCanvasWidth() + scrollbarDimensions.width + "px");
$headers.width(getHeadersWidth());
$headerRowSpacerL.css("width", getCanvasWidth() + scrollbarDimensions.width + "px");
$headerRowSpacerR.css("width", getCanvasWidth() + scrollbarDimensions.width + "px");
// footer Row
if (options.createFooterRow) {
$footerRowScrollerR = $("<div class='slick-footerrow ui-state-default' />").appendTo($paneTopR);
$footerRowScrollerL = $("<div class='slick-footerrow ui-state-default' />").appendTo($paneTopL);
$footerRowScroller = $().add($footerRowScrollerL).add($footerRowScrollerR);
$footerRowSpacerL = $("<div style='display:block;height:1px;position:absolute;top:0;left:0;'></div>")
.css("width", getCanvasWidth() + scrollbarDimensions.width + "px")
.appendTo($footerRowScrollerL);
$footerRowSpacerR = $("<div style='display:block;height:1px;position:absolute;top:0;left:0;'></div>")
.css("width", getCanvasWidth() + scrollbarDimensions.width + "px")
.appendTo($footerRowScrollerR);
$footerRowL = $("<div class='slick-footerrow-columns slick-footerrow-columns-left' />").appendTo($footerRowScrollerL);
$footerRowR = $("<div class='slick-footerrow-columns slick-footerrow-columns-right' />").appendTo($footerRowScrollerR);
$footerRow = $().add($footerRowL).add($footerRowR);
if (!options.showFooterRow) {
$footerRowScroller.hide();
}
}
$focusSink2 = $focusSink.clone().appendTo($container);
if (!options.explicitInitialization) {
finishInitialization();
}
}
function finishInitialization() {
if (!initialized) {
initialized = true;
getViewportWidth();
getViewportHeight();
// header columns and cells may have different padding/border skewing width calculations (box-sizing, hello?)
// calculate the diff so we can set consistent sizes
measureCellPaddingAndBorder();
// for usability reasons, all text selection in SlickGrid is disabled
// with the exception of input and textarea elements (selection must
// be enabled there so that editors work as expected); note that
// selection in grid cells (grid body) is already unavailable in
// all browsers except IE
disableSelection($headers); // disable all text selection in header (including input and textarea)
if (!options.enableTextSelectionOnCells) {
// disable text selection in grid cells except in input and textarea elements
// (this is IE-specific, because selectstart event will only fire in IE)
$viewport.on("selectstart.ui", function (event) {
return $(event.target).is("input,textarea");
});
}
setFrozenOptions();
setPaneVisibility();
setScroller();
setOverflow();
updateColumnCaches();
createColumnHeaders();
createColumnGroupHeaders();
createColumnFooter();
setupColumnSort();
createCssRules();
resizeCanvas();
bindAncestorScrollEvents();
$container
.on("resize.slickgrid", resizeCanvas);
$viewport
.on("scroll", handleScroll);
if (jQuery.fn.mousewheel && options.enableMouseWheelScrollHandler) {
$viewport.on("mousewheel", handleMouseWheel);
}
$headerScroller
//.on("scroll", handleHeaderScroll)
.on("contextmenu", handleHeaderContextMenu)
.on("click", handleHeaderClick)
.on("mouseenter", ".slick-header-column", handleHeaderMouseEnter)
.on("mouseleave", ".slick-header-column", handleHeaderMouseLeave);
$headerRowScroller
.on("scroll", handleHeaderRowScroll);
if (options.createFooterRow) {
$footerRow
.on("contextmenu", handleFooterContextMenu)
.on("click", handleFooterClick);
$footerRowScroller
.on("scroll", handleFooterRowScroll);
}
if (options.createPreHeaderPanel) {
$preHeaderPanelScroller
.on("scroll", handlePreHeaderPanelScroll);
}
$focusSink.add($focusSink2)
.on("keydown", handleKeyDown);
$canvas
.on("keydown", handleKeyDown)
.on("click", handleClick)
.on("dblclick", handleDblClick)
.on("contextmenu", handleContextMenu)
.on("draginit", handleDragInit)
.on("dragstart", {distance: 3}, handleDragStart)
.on("drag", handleDrag)
.on("dragend", handleDragEnd)
.on("mouseenter", ".slick-cell", handleMouseEnter)
.on("mouseleave", ".slick-cell", handleMouseLeave);
if (!options.suppressCssChangesOnHiddenInit) { restoreCssFromHiddenInit(); }
}
}
function cacheCssForHiddenInit() {
// handle display:none on container or container parents
$hiddenParents = $container.parents().addBack().not(':visible');
$hiddenParents.each(function() {
var old = {};
for ( var name in cssShow ) {
old[ name ] = this.style[ name ];
this.style[ name ] = cssShow[ name ];
}
oldProps.push(old);
});
}
function restoreCssFromHiddenInit() {
// finish handle display:none on container or container parents
// - put values back the way they were
$hiddenParents.each(function(i) {
var old = oldProps[i];
for ( var name in cssShow ) {
this.style[ name ] = old[ name ];
}
});
}
function hasFrozenColumns() {
return options.frozenColumn > -1;
}
function registerPlugin(plugin) {
plugins.unshift(plugin);
plugin.init(self);
}
function unregisterPlugin(plugin) {
for (var i = plugins.length; i >= 0; i--) {
if (plugins[i] === plugin) {
if (plugins[i].destroy) {
plugins[i].destroy();
}
plugins.splice(i, 1);
break;
}
}
}
function getPluginByName(name) {
for (var i = plugins.length-1; i >= 0; i--) {
if (plugins[i].pluginName === name) {
return plugins[i];
}
}
return undefined;
}
function setSelectionModel(model) {
if (selectionModel) {
selectionModel.onSelectedRangesChanged.unsubscribe(handleSelectedRangesChanged);
if (selectionModel.destroy) {
selectionModel.destroy();
}
}
selectionModel = model;
if (selectionModel) {
selectionModel.init(self);
selectionModel.onSelectedRangesChanged.subscribe(handleSelectedRangesChanged);
}
}
function getSelectionModel() {
return selectionModel;
}
function getCanvasNode(columnIdOrIdx, rowIndex) {
return _getContainerElement(getCanvases(), columnIdOrIdx, rowIndex);
}
function getActiveCanvasNode(element) {
setActiveCanvasNode(element);
return $activeCanvasNode[0];
}
function getCanvases() {
return $canvas;
}
function setActiveCanvasNode(element) {
if (element) {
$activeCanvasNode = $(element.target).closest('.grid-canvas');
}
}
function getViewportNode(columnIdOrIdx, rowIndex) {
return _getContainerElement(getViewports(), columnIdOrIdx, rowIndex);
}
function getViewports() {
return $viewport;
}
function getActiveViewportNode(element) {
setActiveViewportNode(element);
return $activeViewportNode[0];
}
function setActiveViewportNode(element) {
if (element) {
$activeViewportNode = $(element.target).closest('.slick-viewport');
}
}
function _getContainerElement($targetContainers, columnIdOrIdx, rowIndex) {
if (!$targetContainers) { return }
if (!columnIdOrIdx) { columnIdOrIdx = 0; }
if (!rowIndex) { rowIndex = 0; }
var idx = (typeof columnIdOrIdx === "number" ? columnIdOrIdx : getColumnIndex(columnIdOrIdx));
var isBottomSide = hasFrozenRows && rowIndex >= actualFrozenRow + (options.frozenBottom ? 0 : 1);
var isRightSide = hasFrozenColumns() && idx > options.frozenColumn;
return $targetContainers[(isBottomSide ? 2 : 0) + (isRightSide ? 1 : 0)];
}
function measureScrollbar() {
var $outerdiv = $('<div class="' + $viewport.className + '" style="position:absolute; top:-10000px; left:-10000px; overflow:auto; width:100px; height:100px;"></div>').appendTo('body');
var $innerdiv = $('<div style="width:200px; height:200px; overflow:auto;"></div>').appendTo($outerdiv);
var dim = {
width: $outerdiv[0].offsetWidth - $outerdiv[0].clientWidth,
height: $outerdiv[0].offsetHeight - $outerdiv[0].clientHeight
};
$innerdiv.remove();
$outerdiv.remove();
return dim;
}
function getHeadersWidth() {
headersWidth = headersWidthL = headersWidthR = 0;
var includeScrollbar = !options.autoHeight;
for (var i = 0, ii = columns.length; i < ii; i++) {
var width = columns[ i ].width;
if (( options.frozenColumn ) > -1 && ( i > options.frozenColumn )) {
headersWidthR += width;
} else {
headersWidthL += width;
}
}
if (includeScrollbar) {
if (( options.frozenColumn ) > -1 && ( i > options.frozenColumn )) {
headersWidthR += scrollbarDimensions.width;
} else {
headersWidthL += scrollbarDimensions.width;
}
}
if (hasFrozenColumns()) {
headersWidthL = headersWidthL + 1000;
headersWidthR = Math.max(headersWidthR, viewportW) + headersWidthL;
headersWidthR += scrollbarDimensions.width;
} else {
headersWidthL += scrollbarDimensions.width;
headersWidthL = Math.max(headersWidthL, viewportW) + 1000;
}
headersWidth = headersWidthL + headersWidthR;
return Math.max(headersWidth, viewportW) + 1000;
}
function getHeadersWidthL() {
headersWidthL =0;
columns.forEach(function(column, i) {
if (!(( options.frozenColumn ) > -1 && ( i > options.frozenColumn )))
headersWidthL += column.width;
});
if (hasFrozenColumns()) {
headersWidthL += 1000;
} else {
headersWidthL += scrollbarDimensions.width;
headersWidthL = Math.max(headersWidthL, viewportW) + 1000;
}
return headersWidthL;
}
function getHeadersWidthR() {
headersWidthR =0;
columns.forEach(function(column, i) {
if (( options.frozenColumn ) > -1 && ( i > options.frozenColumn ))
headersWidthR += column.width;
});
if (hasFrozenColumns()) {
headersWidthR = Math.max(headersWidthR, viewportW) + getHeadersWidthL();
headersWidthR += scrollbarDimensions.width;
}
return headersWidthR;
}
function getCanvasWidth() {
var availableWidth = viewportHasVScroll ? viewportW - scrollbarDimensions.width : viewportW;
var i = columns.length;
canvasWidthL = canvasWidthR = 0;
while (i--) {
if (hasFrozenColumns() && (i > options.frozenColumn)) {
canvasWidthR += columns[i].width;
} else {
canvasWidthL += columns[i].width;
}
}
var totalRowWidth = canvasWidthL + canvasWidthR;
return options.fullWidthRows ? Math.max(totalRowWidth, availableWidth) : totalRowWidth;
}
function updateCanvasWidth(forceColumnWidthsUpdate) {
var oldCanvasWidth = canvasWidth;
var oldCanvasWidthL = canvasWidthL;
var oldCanvasWidthR = canvasWidthR;
var widthChanged;
canvasWidth = getCanvasWidth();
widthChanged = canvasWidth !== oldCanvasWidth || canvasWidthL !== oldCanvasWidthL || canvasWidthR !== oldCanvasWidthR;
if (widthChanged || hasFrozenColumns() || hasFrozenRows) {
$canvasTopL.width(canvasWidthL);
getHeadersWidth();
$headerL.width(headersWidthL);
$headerR.width(headersWidthR);
if (hasFrozenColumns()) {
$canvasTopR.width(canvasWidthR);
$paneHeaderL.width(canvasWidthL);
$paneHeaderR.css('left', canvasWidthL);
$paneHeaderR.css('width', viewportW - canvasWidthL);
$paneTopL.width(canvasWidthL);
$paneTopR.css('left', canvasWidthL);
$paneTopR.css('width', viewportW - canvasWidthL);
$headerRowScrollerL.width(canvasWidthL);
$headerRowScrollerR.width(viewportW - canvasWidthL);
$headerRowL.width(canvasWidthL);
$headerRowR.width(canvasWidthR);
if (options.createFooterRow) {
$footerRowScrollerL.width(canvasWidthL);
$footerRowScrollerR.width(viewportW - canvasWidthL);
$footerRowL.width(canvasWidthL);
$footerRowR.width(canvasWidthR);
}
if (options.createPreHeaderPanel) {
$preHeaderPanel.width(canvasWidth);
}
$viewportTopL.width(canvasWidthL);
$viewportTopR.width(viewportW - canvasWidthL);
if (hasFrozenRows) {
$paneBottomL.width(canvasWidthL);
$paneBottomR.css('left', canvasWidthL);
$viewportBottomL.width(canvasWidthL);
$viewportBottomR.width(viewportW - canvasWidthL);
$canvasBottomL.width(canvasWidthL);
$canvasBottomR.width(canvasWidthR);
}
} else {
$paneHeaderL.width('100%');
$paneTopL.width('100%');
$headerRowScrollerL.width('100%');
$headerRowL.width(canvasWidth);
if (options.createFooterRow) {
$footerRowScrollerL.width('100%');
$footerRowL.width(canvasWidth);
}
if (options.createPreHeaderPanel) {
$preHeaderPanel.width('100%');
$preHeaderPanel.width(canvasWidth);
}
$viewportTopL.width('100%');
if (hasFrozenRows) {
$viewportBottomL.width('100%');
$canvasBottomL.width(canvasWidthL);
}
}
viewportHasHScroll = (canvasWidth >= viewportW - scrollbarDimensions.width);
}
$headerRowSpacerL.width(canvasWidth + (viewportHasVScroll ? scrollbarDimensions.width : 0));
$headerRowSpacerR.width(canvasWidth + (viewportHasVScroll ? scrollbarDimensions.width : 0));
if (options.createFooterRow) {
$footerRowSpacerL.width(canvasWidth + (viewportHasVScroll ? scrollbarDimensions.width : 0));
$footerRowSpacerR.width(canvasWidth + (viewportHasVScroll ? scrollbarDimensions.width : 0));
}
if (widthChanged || forceColumnWidthsUpdate) {
applyColumnWidths();
}
}
function disableSelection($target) {
if ($target && $target.jquery) {
$target
.attr("unselectable", "on")
.css("MozUserSelect", "none")
.on("selectstart.ui", function () {
return false;
}); // from jquery:ui.core.js 1.7.2
}
}
function getMaxSupportedCssHeight() {
var supportedHeight = 1000000;
// FF reports the height back but still renders blank after ~6M px
var testUpTo = navigator.userAgent.toLowerCase().match(/firefox/) ? 6000000 : 1000000000;
var div = $("<div style='display:none' />").appendTo(document.body);
while (true) {
var test = supportedHeight * 2;
div.css("height", test);
if (test > testUpTo || div.height() !== test) {
break;
} else {
supportedHeight = test;
}
}
div.remove();
return supportedHeight;
}
function getUID() {
return uid;
}
function getHeaderColumnWidthDiff() {
return headerColumnWidthDiff;
}
function getScrollbarDimensions() {
return scrollbarDimensions;
}
// TODO: this is static. need to handle page mutation.
function bindAncestorScrollEvents() {
var elem = (hasFrozenRows && !options.frozenBottom) ? $canvasBottomL[0] : $canvasTopL[0];
while ((elem = elem.parentNode) != document.body && elem != null) {
// bind to scroll containers only
if (elem == $viewportTopL[0] || elem.scrollWidth != elem.clientWidth || elem.scrollHeight != elem.clientHeight) {
var $elem = $(elem);
if (!$boundAncestors) {
$boundAncestors = $elem;
} else {
$boundAncestors = $boundAncestors.add($elem);
}
$elem.on("scroll." + uid, handleActiveCellPositionChange);
}
}
}
function unbindAncestorScrollEvents() {
if (!$boundAncestors) {
return;
}
$boundAncestors.off("scroll." + uid);
$boundAncestors = null;
}
function updateColumnHeader(columnId, title, toolTip) {
if (!initialized) { return; }
var idx = getColumnIndex(columnId);
if (idx == null) {
return;
}
var columnDef = columns[idx];
var $header = $headers.children().eq(idx);