htmlembed.java

tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛

/*
 * 作者: 胡李青
 * qq: 31703299
 * Copyright (c) 2007 huliqing
 * 主页 http://www.tbuy.biz/
 * 你可以免费使用该软件，未经许可请勿作用于任何商业目的,如有技术问题请与本人联系！
 */

package biz.tbuy.common.components.embed;

import biz.tbuy.common.components.TbuyExtensionsFilter;
import java.io.IOException;
import javax.faces.component.UIComponentBase;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

/**
 * 这是一个音乐组件，支持lrc同步歌词！内含一个Mediaplay播放器！用于在网页中播放音乐，
 * 最简单的使用方法，指定两个属性即可：url, lrc  即音乐文件的地址及lrc歌词地址！可以
 * 是网络或是站内地址！ 使用该组件需要配置过滤器TbuyExtensionsFilter,请查看web.xml<br>
 * 存在的问题，因为内含的是MediaPlay播放器，所以在火狐（firefox)或其他浏览器可能无法
 * 实现歌词同步！
 * @version 1.1
 * @author huliqing
 * 最后修改：2007-12-06
 * <p><b>qq：</b>31703299
 * <p><b>E-mail：</b><a href="mailto:[e-mail]">[e-mail]</a>
 * <p><b>Homepage：</b><a href="http://www.tbuy.biz/">http://www.tbuy.biz/</a>
 */
public class HtmlEmbed extends UIComponentBase{
    private String _PATH = "biz/tbuy/common/components/embed/";
    private String _SCRIPT = "embed.js";
    private String _IMG_PLAYING = "playing.gif";
    private String _BACKGROUND = "background.jpg";
    private String _IMG_PLAY = "play.jpg";
    private String _IMG_STOP = "stop.jpg";
    private String _IMG_PAUSE = "pause.jpg";

    public String getFamily() {
        return null;
    }
    
    @Override
    public void encodeBegin(FacesContext fc) throws IOException {
        String visible = (String)getAttributes().get("visible");
        if (visible != null && (visible.equals("false") || visible.equals("0"))) {
            return;
        }
        ResponseWriter rw = fc.getResponseWriter();
        String clientId = getClientId(fc);
        
        String bg = fc.getExternalContext().getRequestContextPath() + 
                TbuyExtensionsFilter.TBUY_EXT_ID + 
                TbuyExtensionsFilter.REQUEST_IMG + "=" + 
                _PATH + _BACKGROUND;
        String style = "width:475px;height:22px;" +
                "padding:3px;" +
              //"border:1px solid #808080;" +
                "background: url("+ bg +");" +
                "font-family: 华文楷体;" +
                "font-size: 14px;" + 
                "color:#00FF00;" +
                (String)getAttributes().get("style");
        
        encodeScript(fc);   // script资源
        rw.startElement("div", this);
        rw.writeAttribute("id", clientId, null);
        rw.writeAttribute("style", style, null);
        encodePlayingImg(fc, clientId); // 
        encodeMediaPlay2(fc, clientId); // .渲染播放器
        encodeCurTime(fc, clientId);    // .渲染当前播放时间区
        encodeOutput(fc, clientId);     // .渲染当前歌词区
        encodeControls(fc, clientId);   // .渲染控制按钮
        rw.endElement("div");
        
        encodeOutput2(fc, clientId);    // .渲染所有歌词区
        encodeOnStart(fc, clientId);    // .渲染LRC歌词请求
    }
    
    private void encodePlayingImg(FacesContext fc, String clientId) throws IOException {
        ResponseWriter rw = fc.getResponseWriter();
        String contentPath = fc.getExternalContext().getRequestContextPath();
        rw.startElement("div", this);
        if (clientId != null) rw.writeAttribute("id", clientId + ":playing", null);
        rw.writeAttribute("style", "float:left;margin-top:3px;margin-left:2px", null);
        rw.startElement("img", this);
        rw.writeAttribute("src", contentPath + 
                TbuyExtensionsFilter.TBUY_EXT_ID + 
                TbuyExtensionsFilter.REQUEST_IMG + "=" + 
                _PATH + _IMG_PLAYING, null);
        rw.endElement("img");
        rw.endElement("div");
    }
    
    private void encodeScript(FacesContext fc) throws IOException {
        ResponseWriter rw = fc.getResponseWriter();
        String contentPath = fc.getExternalContext().getRequestContextPath();
        rw.startElement("script", this);
        rw.writeAttribute("type", "text/javascript", null);
        rw.writeAttribute("src", contentPath + 
                TbuyExtensionsFilter.TBUY_EXT_ID + 
                TbuyExtensionsFilter.REQUEST_SCRIPT + "=" + 
                _PATH + _SCRIPT, null);
        rw.endElement("script");
    }
    
    private void encodeMediaPlay2(FacesContext fc, String clientId) throws IOException {
        String id;
        String url;
        String autoStart;
        String playCount;
        String invokeURLs;
        String defaultFrame;
        
        String balance;
        String enabled;
        String enableContextMenu;
        String rate;
        String currentPosition;
        String currentMarker;
        String baseURL;
        String stretchToFit;
        String volume;
        String mute;
        String uiMode;
        String windowlessVideo;
        String fullScreen;
        String enableErrorDialogs;
        String SAMIStyle;
        String SAMILang;
        String SAMIFilename;
        
        url = (String)getAttributes().get("url");
        autoStart = (String)getAttributes().get("autoStart");
        playCount = (String)getAttributes().get("playCount");
        invokeURLs = (String)getAttributes().get("invokeURLs");
        defaultFrame = (String)getAttributes().get("defaultFrame");
        
        balance = (String)getAttributes().get("balance");
        enabled = (String)getAttributes().get("enabled");
        enableContextMenu = (String)getAttributes().get("enableContextMenu");
        rate = (String)getAttributes().get("rate");
        currentPosition = (String)getAttributes().get("currentPosition");
        currentMarker = (String)getAttributes().get("currentMarker");
        baseURL = (String)getAttributes().get("baseURL");
        stretchToFit = (String)getAttributes().get("stretchToFit");
        volume = (String)getAttributes().get("volume");
        mute = (String)getAttributes().get("mute");
        uiMode = (String)getAttributes().get("uiMode");
        windowlessVideo = (String)getAttributes().get("windowlessVideo");
        fullScreen = (String)getAttributes().get("fullScreen");
        enableErrorDialogs = (String)getAttributes().get("enableErrorDialogs");
        SAMIStyle = (String)getAttributes().get("SAMIStyle");
        SAMILang = (String)getAttributes().get("SAMILang");
        SAMIFilename = (String)getAttributes().get("SAMIFilename");
        
        
        ResponseWriter rw = fc.getResponseWriter();
        rw.startElement("div", this);
        rw.writeAttribute("style", "float:left;", null);
        rw.startElement("object", this);
        rw.writeAttribute("classid", "CLSID:6BF52A52-394A-11d3-B153-00C04F79FAA6", null);
        rw.writeAttribute("codebase", "http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=6,4,7,1112", null);
        rw.writeAttribute("align", "baseline", null);
        rw.writeAttribute("border", "0", null);
        rw.writeAttribute("standby", "Loading Microsoft Windows Media Player components...", null);
        rw.writeAttribute("type", "application/x-oleobject", null);
        rw.writeAttribute("style", "float: baseline", null);
        rw.writeAttribute("width", "0", null);
        rw.writeAttribute("height", "0", null);
        
        if (clientId != null) rw.writeAttribute("id", clientId + ":player", null);
        if (url != null) encodeParam(rw, "url", url);
        if (autoStart != null) encodeParam(rw, "autoStart", autoStart);
        if (playCount != null) encodeParam(rw, "playCount", playCount);
        if (invokeURLs != null) encodeParam(rw, "invokeURLs", invokeURLs);
        if (defaultFrame != null) encodeParam(rw, "defaultFrame", defaultFrame);
        // 调整左右声道平衡,同上面旧播放器代码，默认 0
        if (balance != null) encodeParam(rw, "Balance", balance);
        // 播放器是否可人为控制,默认 -1
        if (enabled != null) encodeParam(rw, "enabled", enabled);
        // 是否启用上下文菜单,默认 -1
        if (enableContextMenu != null) encodeParam(rw, "enableContextMenu", enableContextMenu);