CKEditor: Controlling Entermode with a toolbar button - ckeditor

Question

By default, CKEditor's enter key behavior is adding a <p> tag and starting a new paragraph. But that behavior can be modified in the configuration with a .EnterMode parameter.
I'm wondering if there is a way to change Enter key behavior in the runtime, by putting a button into its tool bar, to switch between <p> and <br> (single line vs double line), just like as in Word.
Any ideas on how to do this?

Answer 1

Save the following to editor_dir/plugins/entermode/plugin.js:
'use strict';
(function() {
CKEDITOR.plugins.add( 'entermode', {
icons: 'entermode',
init: function( editor ) {
var enterP = new enterModeCommand( editor, CKEDITOR.ENTER_P );
var enterBR = new enterModeCommand( editor, CKEDITOR.ENTER_BR );
editor.addCommand( 'entermodep', enterP );
editor.addCommand( 'entermodebr', enterBR );
if ( editor.ui.addButton ) {
editor.ui.addButton( 'EnterP', {
label: 'Enter mode P',
command: 'entermodep',
toolbar: 'paragraph,10'
});
editor.ui.addButton( 'EnterBR', {
label: 'Enter mode BR',
command: 'entermodebr',
toolbar: 'paragraph,20'
});
}
editor.on( 'dataReady', function() {
refreshButtons( editor );
});
}
});
function refreshButtons( editor ) {
editor.getCommand( 'entermodep' ).setState(
editor.config.enterMode == CKEDITOR.ENTER_P ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF );
editor.getCommand( 'entermodebr' ).setState(
editor.config.enterMode == CKEDITOR.ENTER_BR ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF );
}
function enterModeCommand( editor, mode ) {
this.mode = mode;
}
enterModeCommand.prototype = {
exec: function( editor ) {
editor.config.enterMode = this.mode;
refreshButtons( editor );
},
refresh: function( editor, path ) {
refreshButtons( editor );
}
};
})();
Now add the following to toolbar.css in your skin file:
.cke_button__enterp_icon, .cke_button__enterbr_icon { display: none !important; }
.cke_button__enterp_label, .cke_button__enterbr_label { display: inline !important; }
...or paint some icons, if you want.
Enable the plugin when running the editor:
CKEDITOR.replace( 'id', { extraPlugins: 'entermode' } );
Now you can control config.enterMode from the toolbar.