01.code/LanweiUI/UEditor/_src/plugins/paragraph.js

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///import core
///commands 格式
///commandsName  Paragraph
///commandsTitle  段落格式
/**
 * 段落样式
 * @function
 * @name baidu.editor.execCommand
 * @param   {String}   cmdName     paragraph插入段落执行命令
 * @param   {String}   style               标签值为：'p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6'
 * @param   {String}   attrs               标签的属性
 * @author zhanyi
 */
UE.plugins['paragraph'] = function() {
    var me = this,
        block = domUtils.isBlockElm,
        notExchange = ['TD','LI','PRE'],

        doParagraph = function(range,style,attrs,sourceCmdName){
            var bookmark = range.createBookmark(),
                filterFn = function( node ) {
                    return   node.nodeType == 1 ? node.tagName.toLowerCase() != 'br' &&  !domUtils.isBookmarkNode(node) : !domUtils.isWhitespace( node )
                },
                para;

            range.enlarge( true );
            var bookmark2 = range.createBookmark(),
                current = domUtils.getNextDomNode( bookmark2.start, false, filterFn ),
                tmpRange = range.cloneRange(),
                tmpNode;
            while ( current && !(domUtils.getPosition( current, bookmark2.end ) & domUtils.POSITION_FOLLOWING) ) {
                if ( current.nodeType == 3 || !block( current ) ) {
                    tmpRange.setStartBefore( current );
                    while ( current && current !== bookmark2.end && !block( current ) ) {
                        tmpNode = current;
                        current = domUtils.getNextDomNode( current, false, null, function( node ) {
                            return !block( node )
                        } );
                    }
                    tmpRange.setEndAfter( tmpNode );
                    
                    para = range.document.createElement( style );
                    if(attrs){
                        domUtils.setAttributes(para,attrs);
                        if(sourceCmdName && sourceCmdName == 'customstyle' && attrs.style)
                            para.style.cssText = attrs.style;
                    }
                    para.appendChild( tmpRange.extractContents() );
                    //需要内容占位
                    if(domUtils.isEmptyNode(para)){
                        domUtils.fillChar(range.document,para);
                        
                    }

                    tmpRange.insertNode( para );

                    var parent = para.parentNode;
                    //如果para上一级是一个block元素且不是body,td就删除它
                    if ( block( parent ) && !domUtils.isBody( para.parentNode ) && utils.indexOf(notExchange,parent.tagName)==-1) {
                        //存储dir,style