CKEditor - Change image source

Question

I have made some custom functionality to the CKEditor. In short, it shows a div tag with 5 links, for Small, Medium, Large X-Large and Original size.

When I click the links, it changes the SRC attribute of the image to the correct size.

It works, but it doesn't persist back to the editor. It's like the Image i get through the click event target, is not part of the Source code.

How can I change the Source code, when manipulating with the elements in the editor?

My code looks like this:

$(target).ckeditor(function (editor) {
    $(this.document.$).bind("click", function (event) {
        var target = $(event.target);

        if (target.is("img")) {
            var p = $("<div contenteditable='false' class='image-properties'>" + Milkshake.Resources.Text.size + ": <a class='sizeLink' href='#size1Img'>S</a>&nbsp;<a class='sizeLink' href='#size2Img'>M</a>&nbsp;<a class='sizeLink' href='#size3Img'>L</a>&nbsp;<a class='sizeLink' href='#size4Img'>XL</a>&nbsp;<a class='sizeLink' href='#size5Img'>Org.</a></div>");
            p.css("top", target.position().top);

            var regex = new RegExp(/(size\d{1}img)/i);
            var match = regex.exec(target.attr("src"));

            if (match != null) {
                var imgSrize = match[0];
                p.find("a[href=#" + imgSrize + "]").addClass("selected");
            }

            p.delegate("a", "click", function (e) {
                var link = $(e.target);

                if (!link.is(".selected")) {
                    $(".selected", link.parent()).removeClass("selected");
                    link.addClass("selected");

                    var imageSrc = target.attr("src");
                    imageSrc = imageSrc.replace(/(size\d{1}img)/i, link.attr("href").substring(1));

                    target.attr("src", imageSrc);
                    target.css("width", "");
                    target.css("height", "");
                }

                e.preventDefault();
            });

            p.insertAfter(target);
        } else if (!target.is("div.image-properties")) {
            $("div.image-properties", target.parent()).remove();
        }
    });

Answer 1

The src of images and href of links are protected in CKEditor to avoid browser bugs (when copying, dragging or sometimes even just loading the content), so you must update also this custom attribute:

data-cke-saved-src