pkrss source 之 chrome.tts试用

今天我的pkrss看到有文章说chrome有chrome.tts的接口,所以我写下以下测试source:

// http://developer.chrome.com/extensions/tts.html
var speaktts_chrome = {
        'tts':null,
        
        'support':function(){
            if((typeof(chrome) != "undefined") && chrome && (typeof(chrome.tts) != "undefined") && chrome.tts )
                return true;
            return false;
        },
        
        'init':function(){
            
            if(!this.support())
                return;
            
            this.tts = chrome.tts;
            
            speaktts.tts = this;
        },
        
        'ttsList':null,
        'getTTSList':function(cb){
          if(!this.ttsList){
              this.ttsList = [];
              chrome.tts.getVoices(function(voices) {
                var tts,ttslist,ttsitem;
              for (var i = 0; i < voices.length; i++) {
                  tts = voices[i];
                  ttsitem = ttslist[tts.lang];
                  if(!ttsitem){
                      ttsitem = {'locale':tts.lang,'tts':[]};
                      speaktts_chrome.ttsList.push(ttsitem);
                  }
                  ttsitem.tts.push({"id":tts.extensionId,"name":tts.voiceName});
              }
              });
          }else{
              if(cb)
                cb(this.ttsList);
            }
        },
        
        'speak':function(id){
            var s = pksetting.user.locale2tts[pksetting.user.locale];
            if(s){
                if(s!="")
                    s = "&tts=" + s;
            }else{
                s = "";
            }

            var info = pkrsslib.getItemById(id);
              
            this.tts.speak(
        info.title,{
            'lang': 'zh-CN',
          'onEvent': function(event) {
              // event.type in 
              //   'start': The engine has started speaking the utterance.
            //   'word': A word boundary was reached. Use event.charIndex to determine the current speech position.
            //   'sentence': A sentence boundary was reached. Use event.charIndex to determine the current speech position.
            //   'marker': An SSML marker was reached. Use event.charIndex to determine the current speech position.
            //   'end': The engine has finished speaking the utterance.
            //   'interrupted': This utterance was interrupted by another call to speak() or stop() and did not finish.
            //   'cancelled': This utterance was queued, but then cancelled by another call to speak() or stop() and never began to speak at all.
            //   'error': An engine-specific error occurred and this utterance cannot be spoken. Check event.errorMessage for details. 
              // event.charIndex current position
              if(event.type == 'end'){
                  speaktts.playing = false;

                        if(speaktts.autonext)
                            pkrssspeak.speaknext();
              }
          }
        });
        },
        
        'stop':function(){
            if(this.tts.played)
                this.tts.pause();
        }
};

结果发现,人家只支持在chrome store package的应用程序中.

我就把它打包到我的原来的chrome包中加载我的目标网址.

结果它出现以下错误:

尝试安装此扩展程序时出现以下警告：
'tts' is only allowed for extensions, legacy packaged apps and packaged apps, and this is a hosted app.

然后在鼠标单击事件中增加请求权限代码.

chrome.permissions.request({permissions: ['*://localhost/*','ttsEngine']}, 
             function(p1,p2){
        });

说Error during permissions.request: '*://localhost/*' is not a recognized permission.

改成

chrome.permissions.request({permissions: ['ttsEngine']}, 
             function(p1,p2){
        });

说:Error during permissions.request: The optional permissions API does not support 'ttsEngine'.

把ttsEngine改成tts也是一样.