选项：execcommand_callback - TinyMCE 中文手册

这个选项让你定义一个回调函数，用来处理 execCommand 。这让你可以重载 TinyMCE 的内部命令函数。下面的例子展示了 mceLink 和 mceImage 函数是如何被重载的。

execcommand_callback 选项的使用示例：

function myCustomExecCommandHandler(editor_id, elm, command, user_interface, value) {
	var linkElm, imageElm, inst;

	switch (command) {
		case "mceLink":
			inst = tinyMCE.getInstanceById(editor_id);
			linkElm = tinyMCE.getParentElement(inst.selection.getFocusElement(), "a");

			if (linkElm)
				alert("Link dialog has been overriden. Found link href: " + tinyMCE.getAttrib(linkElm, "href"));
			else
				alert("Link dialog has been overriden.");

			return true;

		case "mceImage":
			inst = tinyMCE.getInstanceById(editor_id);
			imageElm = tinyMCE.getParentElement(inst.selection.getFocusElement(), "img");

			if (imageElm)
				alert("Image dialog has been overriden. Found image src: " + tinyMCE.getAttrib(imageElm, "src"));
			else
				alert("Image dialog has been overriden.");

			return true;
	}

	return false; // Pass to next handler in chain
}

tinyMCE.init({
	...
	execcommand_callback : "myCustomExecCommandHandler"
});