//===============================================
// BROWSER DETECTION FUNCTIONS
function browserVersion()
// Returns an array [BrowserName, Version]
/*
* Currently, we only care whether the browser is IE or not
* and, if IE, whether it is IE8+ or not, so the function
* only distinguishes between IE and Other
* and only returns version for IE.
*/
{
var v;
// declare and initialise variables
var browser = "Other";
var version = 0;
// check for IE
v = getIEVersion();
if(v != -1) {
browser = "IE";
version = v;
}
return [browser, version];
}
function getIEVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
// source: http://msdn.microsoft.com/en-us/library/ms537509(VS.85).aspx
{
var rv = -1; // Return value assumes failure.
if (navigator.appName == 'Microsoft Internet Explorer') {
var ua = navigator.userAgent;
var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
if (re.exec(ua) != null)
rv = parseFloat( RegExp.$1 );
}
return rv;
}
//===============================================
// GENERIC COPYING FUNCTIONS
function getCopyElement(elementName, elementType)
{
var elem = document.getElementById(elementName);
if(elem == undefined) {
elem = document.createElement(elementType);
try {
elem.style.width = 0;
elem.style.height = 0;
}
catch(e) {}
elem.setAttribute("style", "width:0; height:0;");
elem.setAttribute("id", elementName);
document.body.appendChild(elem);
}
return elem;
}
// This is currently only supported by IE browsers.
function copyElementToClipboard(element)
{
var ctrlRange = document.body.createControlRange();
ctrlRange.add(element);
ctrlRange.execCommand('Copy');
}
//===============================================
// IMAGE GENERATION FUNCTIONS
function getCopyImageElement()
{
return getCopyElement("copyImageContainer", "img");
}
// For browsers that support clipboard copy but do not support data URLs (IE7-), load image from server
// The imageID is the id for the image generated by the server
function loadCopyImageFromServer(imageID) {
setCopyImageURL("https://comparator.ricewarner.com/secure-content/clients/displayimage/loadbase64.php?id=" + imageID);
}
// For browsers that support clipboard copy and data URLs (IE8+), generate image from data url
// The imageID is the id for the image generated by the server
function loadCopyImageFromData(imageData) {
setCopyImageURL("data:image/png;base64," + imageData);
}
// For browsers that support data URLs but do not support clipboard copy (non-IE), display
// image in a new window with instruction to right-click and copy
function displayCopyImageFromData(imageData) {
displayCopyImageURL("data:image/png;base64," + imageData);
}
// For browsers that support neither data URLs nor clipboard copy (old browsers!), display
// server-created image in a new window with instruction to right-click and copy
function displayCopyImageFromServer(imageID) {
displayCopyImageURL("https://comparator.ricewarner.com/secure-content/clients/displayimage/loadbase64.php?id=" + imageID);
}
// Generic function to set URL of image container
function setCopyImageURL(url) {
var imageContainer = getCopyImageElement()
imageContainer.onload = copyImageContainerToClipboard; // attempt to copy image to clipboard after loading
imageContainer.setAttribute('src', url);
}
// Generic function to display image for manual copying based on URL
function displayCopyImageURL(url) {
var win = window.open("", "_blank");
win.document.writeln("");
win.document.writeln("");
win.document.writeln("");
win.document.writeln("
Please right-click on the image and select \"Copy\" to copy the image to clipboard.
");
win.document.writeln("");
win.document.close();
}
//===============================================
// IMAGE COPY FUNCTIONS
// This is currently only supported by IE browsers.
function copyImageContainerToClipboard()
{
var imageElem = getCopyImageElement();
copyElementToClipboard(imageElem);
}
//===============================================
// HTML GENERATION/COPY FUNCTIONS
function getCopyHTMLElement()
{
return getCopyElement("copyHTMLContainer", "div");
}
function loadCopyHTMLFromData(htmlString)
{
var copyElem = getCopyHTMLElement();
copyElem.innerHTML = htmlString;
}
// This is currently only supported by IE browsers.
// This does not currently support copying formatting.
function copyHTMLToClipboard()
{
var txtArea = getCopyElement("copyHTMLTextArea", "textarea");
var copyElem = getCopyHTMLElement();
txtArea.innerText = copyElem.innerText;
var txtRange = txtArea.createTextRange();
txtRange.execCommand('RemoveFormat');
txtRange.execCommand('Copy');
}
// Generic function to display HTML for manual copying
function displayCopyHTMLFromData(htmlString) {
var win = window.open("", "_blank");
win.document.writeln("");
win.document.writeln("");
win.document.writeln("");
win.document.writeln("
Please select the text to copy, right-click and select \"Copy\".