| <?xml version="1.0" encoding="utf-8"?> |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <title>Clear datastore data during canvas drag and drop</title> |
| <style type="text/css"> |
| div |
| {height:100px; |
| width:100px; |
| padding:20px; |
| background-color:silver;} |
| </style> |
| <script type="application/ecmascript"> |
| <![CDATA[ |
| var dataTypes = ['text/plain', 'text/uri-list', 'application/xml', 'application/xhtml+xml', 'application/mathml+xml', 'image/svg+xml', 'text/html', 'text/x-example'], |
| 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']; |
| function start(event) |
| {event.dataTransfer.effectAllowed = 'copy'; |
| l = event.dataTransfer.items.length; |
| for(var i = 0; i != dataTypes.length; i++) |
| {event.dataTransfer.setData(dataTypes[i], data[i]);} |
| event.dataTransfer.clearData(); |
| say('items.length (dragstart) : ' + ((event.dataTransfer.items.length == 0)?'PASS':'FAIL'));} |
| function dragElement(event) |
| {for(var i = 0; i != dataTypes.length; i++) |
| {event.dataTransfer.setData(dataTypes[i], 'FAIL'); |
| if(event.dataTransfer.getData(dataTypes[i])) |
| {say('getData(' + dataTypes[i] + ') : FAIL (data store should not be readable during drag)')} |
| } |
| if(event.dataTransfer.items.length != 0) |
| {say('items.length (dragover) : FAIL')} |
| } |
| function enterElement(event) |
| {event.preventDefault(); |
| for(var i = 0; i != dataTypes.length; i++) |
| {event.dataTransfer.setData(dataTypes[i], 'FAIL'); |
| if(event.dataTransfer.getData(dataTypes[i])) |
| {say('getData(' + dataTypes[i] + ') : FAIL (data store should not be readable during dragenter)')} |
| } |
| say('items.length (dragenter) : ' + ((event.dataTransfer.items.length == 0)?'PASS':'FAIL'));} |
| function dataDrop(event) |
| {say('items.length (drop) : ' + ((event.dataTransfer.items.length == 0)?'PASS':'FAIL')); |
| for(var i = 0; i != dataTypes.length; i++) |
| {say('getData(' + dataTypes[i] + ') : ' + ((event.dataTransfer.getData(dataTypes[i]) == '')?'PASS':'FAIL'));} |
| document.querySelector('div').setAttribute('style','background-color:green');} |
| function say(it) |
| {document.querySelector('pre').appendChild(document.createTextNode(it + '\n'));} |
| ]]> |
| </script> |
| </head> |
| <body> |
| <p> |
| <canvas width="100" height="100" draggable="true" ondragstart="start(event)" ondrag="dragElement(event)">Canvas</canvas> |
| </p> |
| <p>Drag canvas pattern to the silver box below and drop it. Silver box should turn green and test results should appear below.</p> |
| <div ondragenter="enterElement(event)" ondragover="return false;" ondrop="dataDrop(event)"/> |
| <pre/> |
| <script type="application/ecmascript"> |
| var canvas = document.querySelector('canvas'), |
| c = canvas.getContext('2d'); |
| for(var x = 0; x != 50; x++) |
| {c.fillStyle = (x%2 == 0)?'navy':'white'; |
| c.beginPath(); |
| c.moveTo(x,x); |
| c.lineTo(100-x,x); |
| c.lineTo(100-x,100-x); |
| c.lineTo(x,100-x); |
| c.closePath(); |
| c.fill();} |
| data[1] = canvas.toDataURL('image/png'); |
| </script> |
| </body> |
| </html> |