/* Any copyright is dedicated to the public domain. http://creativecommons.org/publicdomain/zero/1.0/ */ // Test the getScreenshot property for mozbrowser "use strict"; SimpleTest.waitForExplicitFinish(); function runTest() { browserElementTestHelpers.setEnabledPref(true); browserElementTestHelpers.addPermission(); var iframe1 = document.createElement('iframe'); iframe1.mozbrowser = true; document.body.appendChild(iframe1); iframe1.src = 'data:text/html,' + 'hello'; var screenshotArrayBuffers = []; var numLoaded = 0; function screenshotTaken(screenshotArrayBuffer) { screenshotArrayBuffers.push(screenshotArrayBuffer); if (screenshotArrayBuffers.length === 1) { ok(true, 'Got initial non blank screenshot'); iframe1.src = 'data:text/html,' + 'hello'; // Wait until screenshotArrayBuffer !== screenshotArrayBuffers[0]. waitForScreenshot(function(screenshotArrayBuffer) { var view1 = new Int8Array(screenshotArrayBuffer); var view2 = new Int8Array(screenshotArrayBuffers[0]); if (view1.length != view2.length) { return true; } for (var i = 0; i < view1.length; i++) { if (view1[i] != view2[i]) { return true; } } return false; }); } else if (screenshotArrayBuffers.length === 2) { ok(true, 'Got updated screenshot after source page changed'); SimpleTest.finish(); } } // We continually take screenshots until we get one that we are // happy with. function waitForScreenshot(filter) { function gotScreenshotArrayBuffer() { // |this| is the FileReader whose result contains the screenshot as an // ArrayBuffer. if (filter(this.result)) { screenshotTaken(this.result); return; } if (--attempts === 0) { ok(false, 'Timed out waiting for correct screenshot'); SimpleTest.finish(); } else { setTimeout(function() { iframe1.getScreenshot(1000, 1000).onsuccess = getScreenshotArrayBuffer; }, 200); } } function getScreenshotArrayBuffer(e) { var fr = new FileReader(); fr.onloadend = gotScreenshotArrayBuffer; fr.readAsArrayBuffer(e.target.result); } var attempts = 10; iframe1.getScreenshot(1000, 1000).onsuccess = getScreenshotArrayBuffer; } function iframeLoadedHandler() { numLoaded++; if (numLoaded === 2) { waitForScreenshot(function(screenshotArrayBuffer) { return screenshotArrayBuffer.byteLength != 0; }); } } iframe1.addEventListener('mozbrowserloadend', iframeLoadedHandler); } addEventListener('load', function() { SimpleTest.executeSoon(runTest); });