tablescroller.js
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//********************************************************************************************************************************************
//*
//* TableScroller
//* creates a horizontal and vertical scrolling table with pinned row and column headers
//*
//* element - the dom reference to the table that will be converted to a scrollable table
//* options:
//* width - the width of the table
//* height - the height of the table
//* pinnedRows - the number of pinned rows
//* pinnedCols - the number of pinned columns
//* container - the container id for the scrollable table
//* removeOriginal - indicator for removing the orignal table
//*
//* returns:
//* ref {
//* options - the original options used to configure the scroller
//* corner - dom reference to corner frame
//* cornerTable - dom reference to corner table
//* scrollableColumns - dom reference to scrollable columns frame
//* scrollableColumnsTable - dom reference to scrollable columns table
//* scrollableRows - dom reference to scrollable rows frame
//* scrollableRowsTable - dom reference to scrollable rows table
//* scrollableWindow - dom reference to scrollable data frame
//* scrollableWindowTable - dom reference to scrollable data table
//* }
//*
//********************************************************************************************************************************************
(function () {
if (!Object.assign) {
Object.defineProperty(Object, 'assign', {
enumerable: false,
configurable: true,
writable: true,
value: function (target) {
'use strict';
if (target === undefined || target === null) {
throw new TypeError('Cannot convert first argument to object');
}
var to = Object(target);
for (var i = 1; i < arguments.length; i++) {
var nextSource = arguments[i];
if (nextSource === undefined || nextSource === null) {
continue;
}
nextSource = Object(nextSource);
var keysArray = Object.keys(nextSource);
for (var nextIndex = 0, len = keysArray.length; nextIndex < len; nextIndex++) {
var nextKey = keysArray[nextIndex];
var desc = Object.getOwnPropertyDescriptor(nextSource, nextKey);
if (desc !== undefined && desc.enumerable) {
to[nextKey] = nextSource[nextKey];
}
}
}
return to;
}
});
}
var cloneTableSection = function (table, rowStart, rowEnd, columnStart, columnEnd) {
var cloneTable = table.cloneNode();
cloneTable.removeAttribute("id");
var rows = table.getElementsByTagName("tr");
for (var i = rowStart; (rowEnd == -1 || i < rowEnd) && i < rows.length; i++) {
var row = rows[i];
var parent = row.parentNode;
var parentName = parent.nodeName.toLowerCase();
if (parentName != "table" && cloneTable.getElementsByTagName(parentName).length == 0) {
parent = parent.cloneNode();
cloneTable.appendChild(parent);
}
else {
parent = cloneTable.getElementsByTagName(parentName)[0];
}
var cloneRow = row.cloneNode();
var columns = row.getElementsByTagName("th");
if (columns.length == 0)
columns = row.getElementsByTagName("td");
for (var j = columnStart; (columnEnd == -1 || j < columnEnd) && j < columns.length; j++) {
cloneRow.appendChild(columns[j].cloneNode(true));
}
parent.appendChild(cloneRow);
}
return cloneTable;
};
var getWidth = function (element) {
var cssWidth = getComputedStyle(element, null).getPropertyValue("width");
return parseFloat(cssWidth.replace("px", ""));
}
var getHeight = function (element) {
var cssHeight = getComputedStyle(element, null).getPropertyValue("height");
return parseFloat(cssHeight.replace("px", ""));
}
var alignTableColumnWidths = function (table1, table2) {
if (table1.childNodes.length > 0 && table2.childNodes.length > 0) {
var table1Cells = table1.getElementsByTagName("tr")[0].getElementsByTagName("th");
if (table1Cells.length == 0)
table1Cells = table1.getElementsByTagName("tr")[0].getElementsByTagName("td");
var table2Cells = table2.getElementsByTagName("tr")[0].getElementsByTagName("th");
if (table2Cells.length == 0)
table2Cells = table2.getElementsByTagName("tr")[0].getElementsByTagName("td");
for (var i = 0; i < table1Cells.length; i++) {
if (getWidth(table1Cells[i]) > getWidth(table2Cells[i])) {
table2Cells[i].style.width = getWidth(table1Cells[i]) + "px";
}
else {
table1Cells[i].style.width = getWidth(table2Cells[i]) + "px";
}
}
}
}
this.TableScroller = function (element, options) {
if (typeof element == undefined || element == null || element.nodeName.toLowerCase() != "table")
throw "Invalid table element specified";
if (typeof options == undefined || options == null) throw "Options must be specified";
var defaults = {
width: element.offsetWidth,
height: element.offsetHeight,
pinnedRows: 1,
pinnedCols: 0,
container: ""
};
options = Object.assign(defaults, options);
var containerDiv = null;
if (options.container == "") {
var id = "tablescroller-1";
containerDiv = document.createElement("div");
containerDiv.setAttribute("id", id);
options.container = "#" + id;
element.parentNode.appendChild(containerDiv);
}
else {
containerDiv = document.getElementById(options.container.substr(1));
}
containerDiv.style.width = options.width + "px";
containerDiv.style.height = options.height + "px";
var ref = {
options: options,
corner: null,
cornerTable: null,
scrollableColumns: null,
scrollableColumnsTable: null,
scrollableRows: null,
scrollableRowsTable: null,
scrollableWindow: null,
scrollableWindowTable: null
};
// corner section window and table
if (options.pinnedRows > 0 && options.pinnedCols > 0) {
ref.corner = document.createElement("div");
ref.corner.className = "corner-frame";
ref.cornerTable = cloneTableSection(element, 0, options.pinnedRows, 0, options.pinnedCols);
ref.cornerTable.className = ref.cornerTable.className + " corner-table";
containerDiv.appendChild(ref.corner);
ref.corner.appendChild(ref.cornerTable);
}
// scrollable columns window and table
if (options.pinnedRows > 0) {
ref.scrollableColumns = document.createElement("div");
ref.scrollableColumns.className = "scrollable-columns-frame";
ref.scrollableColumnsTable = cloneTableSection(element, 0, options.pinnedRows, options.pinnedCols, -1);
ref.scrollableColumnsTable.className = ref.scrollableColumnsTable.className + " scrollable-columns-table";
containerDiv.appendChild(ref.scrollableColumns);
ref.scrollableColumns.appendChild(ref.scrollableColumnsTable);
}
// scrollable rows window and table
if (options.pinnedCols > 0) {
ref.scrollableRows = document.createElement("div");
ref.scrollableRows.className = "scrollable-rows-frame";
ref.scrollableRowsTable = cloneTableSection(element, options.pinnedRows, -1, 0, options.pinnedCols);
ref.scrollableRowsTable.className = ref.scrollableRowsTable.className + " scrollable-rows-table";
containerDiv.appendChild(ref.scrollableRows);
ref.scrollableRows.appendChild(ref.scrollableRowsTable);
}
ref.scrollableWindow = document.createElement("div");
ref.scrollableWindow.className = "scrollable-data-frame";
ref.scrollableWindowTable = cloneTableSection(element, options.pinnedRows, -1, options.pinnedCols, -1);
ref.scrollableWindowTable.className = ref.scrollableWindowTable.className + " scrollable-data-table";
containerDiv.appendChild(ref.scrollableWindow);
ref.scrollableWindow.appendChild(ref.scrollableWindowTable);
// adjust scrollable rows column widths
if (ref.corner != null) {
alignTableColumnWidths(ref.cornerTable, ref.scrollableRowsTable);
}
//adjust scrollable columns window width
if (ref.scrollableColumnsTable != null) {
var scwWidth = getWidth(ref.scrollableColumnsTable);
if (scwWidth > getWidth(ref.scrollableWindowTable)) ref.scrollableWindowTable.style.width = getWidth(ref.scrollableColumnsTable) + "px";
else ref.scrollableColumnsTable.style.width = getWidth(ref.scrollableWindowTable) + "px";
//adjust scrollable columns column widths
alignTableColumnWidths(ref.scrollableColumnsTable, ref.scrollableWindowTable);
}
// adjust width
var width = ref.scrollableRows != null ? options.width - getWidth(ref.scrollableRows) : options.width;
ref.scrollableWindow.style.width = width + "px";
// adjust height
var height = ref.scrollableColumns != null ? options.height - getHeight(ref.scrollableColumns) : options.height;
ref.scrollableWindow.style.height = height + "px";
// update scrollable column window or scrollable row window as the user scrolls through the scrollable window
ref.scrollableWindow.addEventListener("scroll", function () {
if (options.pinnedRows > 0) ref.scrollableColumns.scrollLeft = ref.scrollableWindow.scrollLeft;
if (options.pinnedCols > 0) ref.scrollableRows.scrollTop = ref.scrollableWindow.scrollTop;
});
var pinnedColsHeight = ref.corner != null ? getHeight(containerDiv) - getHeight(ref.corner) : 0;
if (ref.scrollableColumns != null && pinnedColsHeight != 0 && pinnedColsHeight < getHeight(ref.scrollableColumns)) ref.scrollableColumns.style.height = pinnedColsHeight + "px";
// adjust scrollable columns frame to scrollable window with scroll bar width
if (ref.scrollableColumns != null) {
var scrollbarWidth = ref.scrollableWindow.offsetWidth - ref.scrollableWindow.clientWidth;
ref.scrollableColumns.style.width = (width - scrollbarWidth) + "px";
}
// adjust scrollable rows frame to scrollable window with scroll bar height
if (ref.scrollableRows != null) {
var scrollbarHeight = ref.scrollableWindow.offsetHeight - ref.scrollableWindow.clientHeight;
ref.scrollableRows.style.height = (height - scrollbarHeight) + "px";
}
if (options.removeOriginal == true) {
element.style.display = "none";
}
return ref;
}
}());