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| author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
|---|---|---|
| committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
| commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
| tree | 10027f336435511475e392454359edea8e25895d /dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js | |
| parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
| download | UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip | |
Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js')
| -rw-r--r-- | dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js b/dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js new file mode 100644 index 000000000..1d61f6afc --- /dev/null +++ b/dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js @@ -0,0 +1,107 @@ +/* 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(); +browserElementTestHelpers.setEnabledPref(true); + +function runTest() { + var dppxPref = 'layout.css.devPixelsPerPx'; + var cssPixelWidth = 600; + var cssPixelHeight = 400; + + var iframe1 = document.createElement('iframe'); + iframe1.setAttribute('width', cssPixelWidth); + iframe1.setAttribute('height', cssPixelHeight); + iframe1.setAttribute('mozbrowser', 'true'); + + iframe1.src = 'data:text/html,<html><body>hello</body></html>'; + document.body.appendChild(iframe1); + + var images = []; + + function screenshotTaken(image) { + images.push(image); + if (images.length === 1) { + ok(true, 'Got initial non blank screenshot'); + + if (image.width !== cssPixelWidth || image.height !== cssPixelHeight) { + ok(false, 'The pixel width of the image received is not correct'); + SimpleTest.finish(); + return; + } + ok(true, 'The pixel width of the image received is correct'); + + SpecialPowers.pushPrefEnv( + {'set': [['layout.css.devPixelsPerPx', 2]]}, takeScreenshot); + } + else if (images.length === 2) { + ok(true, 'Got updated screenshot after source page changed'); + + if (image.width !== cssPixelWidth * 2 || + image.height !== cssPixelHeight * 2) { + ok(false, 'The pixel width of the 2dppx image received is not correct'); + SimpleTest.finish(); + return; + } + ok(true, 'The pixel width of the 2dppx image received is correct'); + SimpleTest.finish(); + } + } + + function takeScreenshot() { + function gotImage(e) { + // |this| is the Image. + + URL.revokeObjectURL(this.src); + + if (e.type === 'error' || !this.width || !this.height) { + tryAgain(); + + return; + } + + screenshotTaken(this); + } + + function tryAgain() { + if (--attempts === 0) { + ok(false, 'Timed out waiting for correct screenshot'); + SimpleTest.finish(); + } else { + setTimeout(function() { + iframe1.getScreenshot(cssPixelWidth, cssPixelHeight).onsuccess = + getScreenshotImageData; + }, 200); + } + } + + function getScreenshotImageData(e) { + var blob = e.target.result; + if (blob.size === 0) { + tryAgain(); + + return; + } + + var img = new Image(); + img.src = URL.createObjectURL(blob); + img.onload = img.onerror = gotImage; + } + + var attempts = 10; + iframe1.getScreenshot(cssPixelWidth, cssPixelHeight).onsuccess = + getScreenshotImageData; + } + + function iframeLoadedHandler() { + SpecialPowers.pushPrefEnv( + {'set': [['layout.css.devPixelsPerPx', 1]]}, takeScreenshot); + } + + iframe1.addEventListener('mozbrowserloadend', iframeLoadedHandler); +} + +addEventListener('testready', runTest); |