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Fix getVisibleElements helper in RTL-locales

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This commit is contained in:
Mohamed 2020-10-09 16:20:06 +02:00
parent 88f72d6b1c
commit b7b048e36c
3 changed files with 30 additions and 11 deletions
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19
test/unit/ui_utils_spec.js
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@ -639,12 +639,12 @@ describe("ui_utils", function () {
// This function takes a fixed layout of pages and compares the system under
// test to the slower implementation above, for a range of scroll viewport
// sizes and positions.
function scrollOverDocument(pages, horizontally = false) {
function scrollOverDocument(pages, horizontally = false, rtl = false) {
const size = pages.reduce(function (max, { div }) {
return Math.max(
max,
horizontally
? div.offsetLeft + div.clientLeft + div.clientWidth
? Math.abs(div.offsetLeft + div.clientLeft + div.clientWidth)
: div.offsetTop + div.clientTop + div.clientHeight
);
}, 0);
@ -652,7 +652,7 @@ describe("ui_utils", function () {
// make scrollOverDocument tests faster, decrease them to make the tests
// more scrupulous, and keep them coprime to reduce the chance of missing
// weird edge case bugs.
for (let i = 0; i < size; i += 7) {
for (let i = -size; i < size; i += 7) {
// The screen height (or width) here (j - i) doubles on each inner loop
// iteration; again, this is just to test an interesting range of cases
// without slowing the tests down to check every possible case.
@ -671,7 +671,7 @@ describe("ui_utils", function () {
clientWidth: 10000,
};
expect(
getVisibleElements(scroll, pages, false, horizontally)
getVisibleElements(scroll, pages, false, horizontally, rtl)
).toEqual(slowGetVisibleElements(scroll, pages));
}
}
@ -737,6 +737,17 @@ describe("ui_utils", function () {
scrollOverDocument(pages, true);
});
it("works with horizontal scrolling with RTL-documents", function () {
const pages = makePages([
[
[-10, 50],
[-20, 20],
[-30, 10],
],
]);
scrollOverDocument(pages, true, true);
});
it("handles `sortByVisibility` correctly", function () {
const scrollEl = {
scrollTop: 75,