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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js')
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diff --git a/dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js b/dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js
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+++ b/dom/browser-element/mochitest/browserElement_GetScreenshotDppx.js
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+/* 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);