Calling quicktags *after* initial setup results in an empty toolbar

[PeterRKnight]

Quicktags.js has a limitation in that if you call quicktags on a textarea after it has been previously been initialized it fails to attach buttons.

To reproduce this bug, go to a post editing page and bring up the console and attempt to call quicktags on a textarea, like:

quicktags({id:"metavalue", buttons: "strong,link,em"});

The expected result is a quicktags toolbar with buttons, instead you get an empty toolbar. This is because of the following lines:

if ( !qt.instances[0] ) {
			qt.instances[0] = qt.instances[id];
			_domReady( function(){ qt._buttonsInit(); } );
		}

Because qt.instances[0] has been set, it fails to continue on to rendering the buttons on a new textarea.

This strikes me as a bug, or at least an unnecessary limitation. I stumbled against this when trying to add a quicktag enabled textarea dynamically.

Thanks for the report. Looks lie Quicktags will need an addInstance( settings ) method to handle this properly.

I've had this problem for years! ​http://wordpress.stackexchange.com/questions/44993/use-quicktags-toolbar-on-any-textarea I wasn't able to track it down or I might've reported it... instead I just thought I was going crazy.

Now that I've come back to my problem code, I've found a very similar issue with the

if ( tinyMCEPreInit.mceInit[ id ] && tinyMCEPreInit.mceInit[ id ].wpautop ) {
    txtarea_el.value = t.wpautop( txtarea_el.value );
}

in switchEditors(). I've gotten around it by using javascript to add my settings for my dynamically added textarea to the tinyMCEPreInit.mceInit object.

// my_settings can be whatever, but I've cloned them from the #content's settings
var settings = $.extend( {}, my_settings, { selector : "#" + id } );

// add our copy to the collection in the tinyMCEPreInit object because switch editors
tinyMCEPreInit.mceInit[id] = settings;

So if the quicktags did at least the same as the tinymce if ( tinyMCEPreInit.mceInit[ id ] ) we could hack our way around it.

If there is an add_Instance(settings) added for quicktags, it'd be great to have that added to tinyMCE as well!

Changing the offending code to this actually seems to resolve it for me (assuming a similar hackish way of adding to the qtInit property):

		if ( qt.instances[id] ) {
			_domReady( function(){ qt._buttonsInit(); } );
		}

I took a stab at an add instance method and coupled with the above change seems to allow for the dynamic addition of quicktags editors.

	qt.addInstance = function(settings) {
		if( 'id' in settings )
			return qt.instances[settings.id] = settings;
	};

Now to got figure out how to make a patch.

add an addInstance() method to quicktags