text: /* SCEditor v1.5.2 | (C) 2016, Sam Clarke | sceditor.com/license */
  !function(a){"use strict";a.sceditor.plugins.undo=function(){var a,b,c=this,d=0,e=50,f=[],g=[],h=!1,i=function(c){h=!0,b=c.value,a.sourceMode(c.sourceMode),a.val(c.value,!1),a.focus(),c.sourceMode?a.sourceEditorCaret(c.caret):a.getRangeHelper().restoreRange(),h=!1},j=function(a,b){var c,d,e,f,g=a.length,h=b.length,i=Math.max(g,h);for(c=0;c<i&&a.charAt(c)===b.charAt(c);c++);for(e=g<h?h-g:0,f=h<g?g-h:0,d=i-1;d>=0&&a.charAt(d-e)===b.charAt(d-f);d--);return d-c+1};c.init=function(){a=this,e=a.undoLimit||e,a.addShortcut("ctrl+z",c.undo),a.addShortcut("ctrl+shift+z",c.redo),a.addShortcut("ctrl+y",c.redo)},c.undo=function(){var b=g.pop(),c=a.val(null,!1);return b&&!f.length&&c===b.value&&(b=g.pop()),b&&(f.length||f.push({caret:a.sourceEditorCaret(),sourceMode:a.sourceMode(),value:c}),f.push(b),i(b)),!1},c.redo=function(){var a=f.pop();return g.length||(g.push(a),a=f.pop()),a&&(g.push(a),i(a)),!1},c.signalReady=function(){var c=a.val(null,!1);b=c,g.push({caret:this.sourceEditorCaret(),sourceMode:this.sourceMode(),value:c})},c.signalValuechangedEvent=function(c){var i=c.rawValue;e>0&&g.length>e&&g.shift(),!h&&b&&b!==i&&(f.length=0,d+=j(b,i),d<20||d<50&&!/\s$/g.test(c.rawValue)||(g.push({caret:a.sourceEditorCaret(),sourceMode:a.sourceMode(),value:i}),d=0,b=i))}}}(jQuery);