73 lines
2.7 KiB
HTML
73 lines
2.7 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<link rel="help" href="https://w3c.github.io/selection-api/#selectionchange-event">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<body>
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<div id="container"><br><br></div>
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<script>
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promise_test(() => {
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return new Promise(resolve => {
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let didFireSelectionChangeEvent = false;
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document.addEventListener("selectionchange", () => { didFireSelectionChangeEvent = true; resolve(); }, {once: true});
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getSelection().setPosition(container, 1);
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assert_false(didFireSelectionChangeEvent);
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});
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}, "selectionchange event on document fires");
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promise_test(() => {
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return (async function() {
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let selectionChangeCount = 0;
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document.addEventListener("selectionchange", () => ++selectionChangeCount);
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container.innerHTML = '<span><br></span><span><br></span>';
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getSelection().setPosition(container, 1);
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assert_equals(selectionChangeCount, 0);
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getSelection().setPosition(container, 2);
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assert_equals(selectionChangeCount, 0);
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await new Promise(setTimeout);
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assert_equals(selectionChangeCount, 1);
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})();
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}, "selectionchange event on document fires once");
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promise_test(() => {
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return (async function() {
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let selectionChangeCount = 0;
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document.addEventListener("selectionchange", () => ++selectionChangeCount);
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container.innerHTML = '<span><br></span><span><br></span>';
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getSelection().setPosition(container, 1);
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assert_equals(selectionChangeCount, 0);
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getSelection().setPosition(container, 2);
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assert_equals(selectionChangeCount, 0);
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await new Promise(setTimeout);
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assert_equals(selectionChangeCount, 1);
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getSelection().setPosition(container, 0);
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assert_equals(selectionChangeCount, 1);
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getSelection().setPosition(container, 2);
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assert_equals(selectionChangeCount, 1);
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await new Promise(setTimeout);
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assert_equals(selectionChangeCount, 2);
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})();
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}, "task to fire selectionchange event gets queued each time selection is mutated");
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promise_test(() => {
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return (async function() {
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let selectionChangeCount = 0;
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document.addEventListener("selectionchange", () => {
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if (!selectionChangeCount) {
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getSelection().setPosition(container, 2);
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getSelection().setPosition(container, 0);
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}
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++selectionChangeCount;
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});
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container.innerHTML = '<b><br></b><b><br></b>';
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getSelection().setPosition(container, 1);
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assert_equals(selectionChangeCount, 0);
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await new Promise(setTimeout);
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assert_equals(selectionChangeCount, 1);
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await new Promise(setTimeout);
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assert_equals(selectionChangeCount, 2);
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})();
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}, "has scheduled selectionchange event is set to false at the beginning of a task to fire selectionchange event");
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</script>
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