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89 lines
2.9 KiB
HTML
89 lines
2.9 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<title>drawFocusIfNeeded()</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<link rel="author" title="W3C">
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<link rel="help" href="http://www.w3.org/TR/2dcontext/#dom-context-2d-drawFocusIfNeeded">
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</head>
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<body>
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<h1>Description</h1>
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<p>This test uses drawFocusIfNeeded to draw a complex path focus then compare ImageData from before and after.</p>
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<div>
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<p>Before:</p>
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<canvas height=100 width=100 id='original'>
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</canvas>
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<p>After:</p>
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<canvas height=100 width=100 id=canvas>
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<label><a href='http://www.w3.org' id='element'>Focus</a></label>
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</canvas>
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</div>
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<script>
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test(function() {
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var canvas = document.getElementById('canvas');
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var context = canvas.getContext('2d');
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var element = document.getElementById('element');
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element.focus();
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context.fillStyle = 'white';
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context.fillRect(0, 0, 100, 100);
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context.beginPath();
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context.strokeStyle = 'black';
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context.moveTo(10, 40);
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context.lineTo(50, 10);
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context.lineTo(90, 40);
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context.lineTo(70, 40);
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context.lineTo(70, 90);
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context.lineTo(30, 90);
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context.lineTo(30, 40);
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context.closePath();
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context.stroke();
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context.save();
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var refImage = context.getImageData(0, 0, 100, 100);
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assert_equals(40000, refImage.data.length, "ImageData.data.length is 40000");
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var original = document.getElementById('original');
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var o_context = original.getContext('2d');
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o_context.fillStyle = 'white';
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o_context.fillRect(0, 0, 100, 100);
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o_context.putImageData(refImage, 0, 0, 0, 0, 100, 100);
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context.beginPath();
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context.moveTo(5, 40);
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context.lineTo(50, 5);
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context.lineTo(95, 40);
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context.lineTo(95, 45);
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context.lineTo(75, 45);
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context.lineTo(75, 95);
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context.lineTo(25, 95);
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context.lineTo(25, 45);
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context.lineTo(5, 45);
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context.closePath();
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context.drawFocusIfNeeded(element);
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var ringImage = context.getImageData(0, 0, 100, 100);
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assert_equals(40000, ringImage.data.length, "ImageData.data.length is 40000");
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// make sure refImage and ringImage are different
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var length = 40000;
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var index = length;
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var identical = true;
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while (--index > 0) {
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if (refImage.data[index] != ringImage.data[index]) identical = false;
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}
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assert_false(identical, "A focus ring appears in the canvas");
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}, 'drawFocusIfNeeded does draw a focus ring if the element is in focus.');
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</script>
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<div id="log"></div>
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</body>
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</html>
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