kotovalexarian-likes-gitlab/gitlab-org--gitlab-foss
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Fix up off index when reading canvas and something failed

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This commit is contained in:
Eric Eastwood 2017-03-02 19:24:12 -06:00
parent 02ce313393
commit c4801e2a16
1 changed files with 6 additions and 3 deletions
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9
app/assets/javascripts/behaviors/gl_emoji/unicode_support_map.js
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@ -74,6 +74,7 @@ function testUnicodeSupportMap(testMap) {
.reduce((list, testKey) => list.concat(testMap[testKey]), []).length;
const canvas = document.createElement('canvas');
(window.gl || window).testEmojiUnicodeSupportMapCanvas = canvas;
const ctx = canvas.getContext('2d');
canvas.width = (2 * fontSize);
canvas.height = (numTestEntries * fontSize);
@ -95,7 +96,9 @@ function testUnicodeSupportMap(testMap) {
let readIndex = 0;
testMapKeys.forEach((testKey) => {
const testEntry = testMap[testKey];
const isTestSatisfied = [].concat(testEntry).every(() => {
// This needs to be a `reduce` instead of `every` because we need to
// keep the `readIndex` in sync from the writes by running all entries
const isTestSatisfied = [].concat(testEntry).reduce((isSatisfied) => {
// Sample along the vertical-middle for a couple of characters
const imageData = ctx.getImageData(
0,
@ -121,8 +124,8 @@ function testUnicodeSupportMap(testMap) {
}
readIndex += 1;
return isValidEmoji;
});
return isSatisfied && isValidEmoji;
}, true);
resultMap[testKey] = isTestSatisfied;
});