030.xhtml (3378B)
1 <?xml version="1.0" encoding="utf-8"?> 2 <html xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <title>Clear datastore data during canvas drag and drop</title> 5 <style type="text/css"> 6 div 7 {height:100px; 8 width:100px; 9 padding:20px; 10 background-color:silver;} 11 </style> 12 <script type="application/ecmascript"> 13 <![CDATA[ 14 var dataTypes = ['text/plain', 'text/uri-list', 'application/xml', 'application/xhtml+xml', 'application/mathml+xml', 'image/svg+xml', 'text/html', 'text/x-example'], 15 data = ['FAIL', 'data:text/plain,FAIL', '<result>FAIL</result>', '<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Data store item</title></head><body><p>FAIL</p></body></html>', '<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>1</mn></math>', '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100px" height="50px" viewBox="0 0 100 50"><text x="0" y="40" font-size="40" fill="green">FAIL</text></svg>', '<!DOCTYPE html><html><head><title>Data store item</title></head><body><p>FAIL</p></body></html>', 'FAIL']; 16 function start(event) 17 {event.dataTransfer.effectAllowed = 'copy'; 18 l = event.dataTransfer.items.length; 19 for(var i = 0; i != dataTypes.length; i++) 20 {event.dataTransfer.setData(dataTypes[i], data[i]);} 21 event.dataTransfer.clearData(); 22 say('items.length (dragstart) : ' + ((event.dataTransfer.items.length == 0)?'PASS':'FAIL'));} 23 function dragElement(event) 24 {for(var i = 0; i != dataTypes.length; i++) 25 {event.dataTransfer.setData(dataTypes[i], 'FAIL'); 26 if(event.dataTransfer.getData(dataTypes[i])) 27 {say('getData(' + dataTypes[i] + ') : FAIL (data store should not be readable during drag)')} 28 } 29 if(event.dataTransfer.items.length != 0) 30 {say('items.length (dragover) : FAIL')} 31 } 32 function enterElement(event) 33 {event.preventDefault(); 34 for(var i = 0; i != dataTypes.length; i++) 35 {event.dataTransfer.setData(dataTypes[i], 'FAIL'); 36 if(event.dataTransfer.getData(dataTypes[i])) 37 {say('getData(' + dataTypes[i] + ') : FAIL (data store should not be readable during dragenter)')} 38 } 39 say('items.length (dragenter) : ' + ((event.dataTransfer.items.length == 0)?'PASS':'FAIL'));} 40 function dataDrop(event) 41 {say('items.length (drop) : ' + ((event.dataTransfer.items.length == 0)?'PASS':'FAIL')); 42 for(var i = 0; i != dataTypes.length; i++) 43 {say('getData(' + dataTypes[i] + ') : ' + ((event.dataTransfer.getData(dataTypes[i]) == '')?'PASS':'FAIL'));} 44 document.querySelector('div').setAttribute('style','background-color:green');} 45 function say(it) 46 {document.querySelector('pre').appendChild(document.createTextNode(it + '\n'));} 47 ]]> 48 </script> 49 </head> 50 <body> 51 <p> 52 <canvas width="100" height="100" draggable="true" ondragstart="start(event)" ondrag="dragElement(event)">Canvas</canvas> 53 </p> 54 <p>Drag canvas pattern to the silver box below and drop it. Silver box should turn green and test results should appear below.</p> 55 <div ondragenter="enterElement(event)" ondragover="return false;" ondrop="dataDrop(event)"/> 56 <pre/> 57 <script type="application/ecmascript"> 58 var canvas = document.querySelector('canvas'), 59 c = canvas.getContext('2d'); 60 for(var x = 0; x != 50; x++) 61 {c.fillStyle = (x%2 == 0)?'navy':'white'; 62 c.beginPath(); 63 c.moveTo(x,x); 64 c.lineTo(100-x,x); 65 c.lineTo(100-x,100-x); 66 c.lineTo(x,100-x); 67 c.closePath(); 68 c.fill();} 69 data[1] = canvas.toDataURL('image/png'); 70 </script> 71 </body> 72 </html>