///import core
///commands 加粗,斜体,上标,下标
///commandsName  Bold,Italic,Subscript,Superscript
///commandsTitle  加粗,加斜,下标,上标
/**
 * b u i等基础功能实现
 * @function
 * @name baidu.editor.execCommands
 * @param    {String}    cmdName    bold加粗。italic斜体。subscript上标。superscript下标。
*/
UE.plugins['basestyle'] = function(){
    var basestyles = {
            'bold':['strong','b'],
            'italic':['em','i'],
            'subscript':['sub'],
            'superscript':['sup']
        },
        getObj = function(editor,tagNames){
            return domUtils.filterNodeList(editor.selection.getStartElementPath(),tagNames);
        },
        me = this;
    //添加快捷键
    me.addshortcutkey({
        "Bold" : "ctrl+66",//^B
        "Italic" : "ctrl+73", //^I
        "Underline" : "ctrl+85"//^U
    });
    for ( var style in basestyles ) {
        (function( cmd, tagNames ) {
            me.commands[cmd] = {
                execCommand : function( cmdName ) {
                    var range = me.selection.getRange(),obj = getObj(this,tagNames);
                    if ( range.collapsed ) {
                        if ( obj ) {
                            var tmpText =  me.document.createTextNode('');
                            range.insertNode( tmpText ).removeInlineStyle( tagNames );
                            range.setStartBefore(tmpText);
                            domUtils.remove(tmpText);
                        } else {
                            var tmpNode = range.document.createElement( tagNames[0] );
                            if(cmdName == 'superscript' || cmdName == 'subscript'){
                                tmpText = me.document.createTextNode('');
                                range.insertNode(tmpText)
                                    .removeInlineStyle(['sub','sup'])
                                    .setStartBefore(tmpText)
                                    .collapse(true);
                            }
                            range.insertNode( tmpNode ).setStart( tmpNode, 0 );
                        }
                        range.collapse( true );
                    } else {
                        if(cmdName == 'superscript' || cmdName == 'subscript'){
                            if(!obj || obj.tagName.toLowerCase() != cmdName){
                                range.removeInlineStyle(['sub','sup']);
                            }
                        }
                        obj ? range.removeInlineStyle( tagNames ) : range.applyInlineStyle( tagNames[0] );
                    }
                    range.select();
                },
                queryCommandState : function() {
                   return getObj(this,tagNames) ? 1 : 0;
                }
            };
        })( style, basestyles[style] );
    }
};