var STKHelper={getIconCanvas:function(mozStkIcon){if(!mozStkIcon||!mozStkIcon.pixels||!mozStkIcon.width||!mozStkIcon.height){return null;}
if(mozStkIcon.pixels.length<(mozStkIcon.width*mozStkIcon.height)){console.error('Not enough pixels for the required dimension: '+
mozStkIcon.width+'x'+mozStkIcon.height);return null;}
if(!mozStkIcon.codingScheme){mozStkIcon.codingScheme='basic';}
var canvas=document.createElement('canvas');canvas.setAttribute('width',mozStkIcon.width);canvas.setAttribute('height',mozStkIcon.height);var ctx=canvas.getContext('2d',{willReadFrequently:true});var imageData=ctx.createImageData(mozStkIcon.width,mozStkIcon.height);var pixel=0,pos=0;var data=imageData.data;for(var y=0;y<mozStkIcon.height;y++){for(var x=0;x<mozStkIcon.width;x++){data[pos++]=(mozStkIcon.pixels[pixel]&0xFF000000)>>>24;data[pos++]=(mozStkIcon.pixels[pixel]&0xFF0000)>>>16;data[pos++]=(mozStkIcon.pixels[pixel]&0xFF00)>>>8;data[pos++]=(mozStkIcon.pixels[pixel]&0xFF);pixel++;}}
ctx.putImageData(imageData,0,0);return canvas;},getMessageText:function(stkMessage,defaultMsgL10nId,defaultMsgL10nArgs){if(this.isIconSelfExplanatory(stkMessage)){return{raw:''};}
var text;if(stkMessage==='string'||stkMessage instanceof String){text=stkMessage;}else{text=stkMessage?stkMessage.text:'';}
if(!text&&defaultMsgL10nId){return{id:defaultMsgL10nId,args:defaultMsgL10nArgs};}
return{raw:text};},isIconSelfExplanatory:function(stkMessage){return(stkMessage&&stkMessage.icons&&stkMessage.iconSelfExplanatory);},getFirstIconRawData:function(stkItem){return stkItem.icons&&stkItem.icons.length>0?stkItem.icons[0]:null;}};