It has been a while since the question was asked, but as i am currently making exactly the same, i thought i share my discoveries and solutions regarding this matter. :)
I am extending TinyMCE for a test-project at work and our solution needs custom tags - in some of them the user should be able to enter only one line, in others (as your em) a lot of text.
Steps to be done, in order to achieve the desired solution:
tell the TinyMCE editor, that your elements are good using the two configuration keywords extended_valid_elements and custom_elements:
tinymce.init({
selector: "textarea#editor",
// ...
extended_valid_elements : "emstart,emend",
custom_elements: "emstart,emend",
content_css: "editor.css"
});
create the two images for the opening and the closing tag. I named mine for the example emstart.png and emend.png.
create a custom CSS style for your custom elements and put them in the custom CSS file (the one that is specified in the TinyMCE configuration, in my case editor.css):
emstart {
background: url(emstart.png) no-repeat;
background-position: left -3px top -3px;
padding: 10px 10px 5px 10px;
background-color:#aabbcc;
border:1px dotted #CCCCCC;
height:50px;
width:100px;
}
emend {
background: url(emend.png) no-repeat;
background-position: left -3px bottom -3px;
padding: 5px 10px 10px 10px;
background-color:#aabbcc;
border:1px dotted #CCCCCC;
height:50px;
width:100px;
}
write a custom plugin that inputs the new tags and put it in the plugins directory. I called mine customem:
plugin code:
tinymce.PluginManager.add('customem', function(editor, url) {
// Add a button that opens a window
editor.addButton('customEmElementButton', {
text: 'Custom EM',
icon: false,
onclick: function() {
// Open window
editor.windowManager.open({
title: 'Please input text',
body: [
{type: 'textbox', name: 'description', label: 'Text'}
],
onsubmit: function(e) {
// Insert content when the window form is submitted
editor.insertContent('<emstart>EM Start</emstart><p>' + e.data.description + '</p><emend>EM End</emend>');
}
});
}
});
// Adds a menu item to the tools menu
editor.addMenuItem('customEmElementMenuItem', {
text: 'Custom EM Element',
context: 'tools',
onclick: function() {
editor.insertContent('<emstart>EM Start</emstart><p>Example text!</p><emend>EM End</emend>');
}
});
});
The last step is to load your custom plugin to the editor (using the plugin and toolbar configuration option) and enjoy the result:
tinymce.init({
selector: "textarea#editor",
height: "500px",
plugins: [
"code, preview, contextmenu, image, link, searchreplace, customem"
],
toolbar: "bold italic | example | code | preview | link | searchreplace | customEmElementButton",
contextmenu: "bold italic",
extended_valid_elements : "emstart,emend",
custom_elements: "emstart,emend",
content_css: "editor.css",
});
The editor now looks like this:
and the source like in your example:
