b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
15 lines
No EOL
3.9 KiB
JavaScript
15 lines
No EOL
3.9 KiB
JavaScript
;'use strict';window.onload=function(){navigator.mozSetMessageHandler('activity',function handler(activityRequest){var activityName=activityRequest.source.name;if(activityName!=='share'&&activityName!=='setwallpaper'){return;}
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startShare(activityRequest);});var preview=document.getElementById('preview');var cancelButton=document.getElementById('cancel');var setButton=document.getElementById('set-wallpaper');var activity;var blob;var url;var gestureDetector=new GestureDetector(preview);var posX=0;var posY=0;var limitX;var limitY;var scale;var previewImage=document.getElementById('previewImage');var screenWidth,screenHeight;var windowWidth,windowHeight;if(screen.mozOrientation&&screen.mozOrientation.startsWith('landscape')){screenWidth=Math.max(screen.width,screen.height);windowWidth=Math.max(window.innerWidth,window.innerHeight);screenHeight=Math.min(screen.width,screen.height);windowHeight=Math.min(window.innerWidth,window.innerHeight);}else{screenWidth=Math.min(screen.width,screen.height);windowWidth=Math.min(window.innerWidth,window.innerHeight);screenHeight=Math.max(screen.width,screen.height);windowHeight=Math.max(window.innerWidth,window.innerHeight);}
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screenWidth=Math.ceil(screenWidth*window.devicePixelRatio);screenHeight=Math.ceil(screenHeight*window.devicePixelRatio);function startShare(request){cancelButton.addEventListener('click',cancelShare);gestureDetector.startDetecting();activity=request;blob=activity.source.data.blobs[0];url=URL.createObjectURL(blob);ImageUtils.getSizeAndType(blob).then(gotImageData,imageDataError);function imageDataError(err){console.error('Could not set wallpaper:',err);activity.postError('Could not set wallpaper: '+err);endShare();}
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function gotImageData(imgdata){if(imgdata.type===ImageUtils.JPEG){var scale=Math.max(screenWidth/imgdata.width,screenHeight/imgdata.height);var fragment=ImageUtils.Downsample.sizeNoMoreThan(scale);loadImage(url,fragment);}
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else{loadImage(url);}}
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function loadImage(url,fragment){previewImage.src=url+(fragment?fragment:'');previewImage.onload=function(){previewImage.hidden=false;var scalex=windowWidth/previewImage.width;var scaley=windowHeight/previewImage.height;scale=Math.max(scalex,scaley);previewImage.width=Math.round(previewImage.width*scale);limitX=windowWidth-previewImage.width;limitY=windowHeight-previewImage.height;posX=Math.round(limitX/2);posY=Math.round(limitY/2);previewImage.style.transform='translate('+posX+'px, '+posY+'px)';setButton.addEventListener('click',scaleImage);previewImage.addEventListener('pan',moveBackground);};}}
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function moveBackground(evt){var positions=evt.detail.relative;posX+=positions.dx;if(posX>0){posX=0;}else if(posX<limitX){posX=limitX;}
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posY+=positions.dy;if(posY>0){posY=0;}else if(posY<limitY){posY=limitY;}
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previewImage.style.transform='translate('+posX+'px, '+posY+'px)';}
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function scaleImage(){setButton.disabled=true;var canvas=document.createElement('canvas');canvas.width=screenWidth;canvas.height=screenHeight;var ctx=canvas.getContext('2d');var w=Math.round(windowWidth/scale);var h=Math.round(windowHeight/scale);var x=Math.round(-1*posX/scale);var y=Math.round(-1*posY/scale);if(x<0){x=0;console.error('The value of x shouldn\'t be negative.');}
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if(y<0){y=0;console.error('The value of y shouldn\'t be negative.');}
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ctx.drawImage(previewImage,x,y,w,h,0,0,canvas.width,canvas.height);canvas.toBlob(function(newBlob){blob=newBlob;setWallpaper();},'image/jpeg');}
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function setWallpaper(){var request=navigator.mozSettings.createLock().set({'wallpaper.image':blob});request.onsuccess=function(){activity.postResult('shared');endShare();};request.onerror=function(){console.warn('error setting wallpaper.image:',request.error);activity.postError('could not set wallpaper: '+request.error);endShare();};}
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function cancelShare(){activity.postError('cancelled');endShare();}
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function endShare(){activity=null;window.URL.revokeObjectURL(url);window.URL.revokeObjectURL(previewImage.src);setButton.removeEventListener('click',scaleImage);cancelButton.removeEventListener('click',cancelShare);}}; |