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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=542058
+-->
+<head>
+ <title>Test for MediaQueryList (Bug 542058)</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body onload="run()">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=542058">Mozilla Bug 542058</a>
+<iframe id="subdoc" src="about:blank"></iframe>
+<div id="content" style="display:none"></div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for MediaQueryList (Bug 542058) **/
+
+SimpleTest.waitForExplicitFinish();
+
+function tick() {
+ // MediaQueryList events are guaranteed to run before requestAnimationFrame
+ // per spec.
+ return new Promise(r => requestAnimationFrame(r));
+}
+
+async function run() {
+ var iframe = document.getElementById("subdoc");
+ var subdoc = iframe.contentDocument;
+ var subwin = iframe.contentWindow;
+ var subroot = subdoc.documentElement;
+
+ var content_div = document.getElementById("content");
+ content_div.style.font = "initial";
+ var em_size =
+ getComputedStyle(content_div).fontSize.match(/^(\d+)px$/)[1];
+
+ var w = Math.floor(em_size * 9.3);
+ var h = Math.floor(em_size * 4.2);
+ iframe.style.width = w + "px";
+ iframe.style.height = h + "px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ function setup_mql(str) {
+ var obj = {
+ str: str,
+ mql: subwin.matchMedia(str),
+ notifyCount: 0,
+ listener: function(event) {
+ ok(event instanceof subwin.MediaQueryListEvent,
+ "correct argument to listener: " + obj.str);
+ is(event.media, obj.mql.media,
+ "correct media in the event: " + obj.str);
+ is(event.target, obj.mql,
+ "correct target in the event: " + obj.str);
+ ++obj.notifyCount;
+ // Test the last match result only on odd
+ // notifications.
+ if (obj.notifyCount & 1) {
+ obj.lastOddMatchResult = event.target.matches;
+ }
+ }
+ }
+ obj.mql.addListener(obj.listener);
+ return obj;
+ }
+
+ function finish_mql(obj) {
+ obj.mql.removeListener(obj.listener);
+ }
+
+ var w_exact_w = setup_mql("(width: " + w + "px)");
+ var w_min_9em = setup_mql("(min-width : 9em)");
+ var w_min_10em = setup_mql("( min-width: 10em ) ");
+ var w_max_9em = setup_mql("(max-width: 9em)");
+ var w_max_10em = setup_mql("(max-width: 10em)");
+
+ is(w_exact_w.mql.media, "(width: " + w + "px)", "serialization");
+ is(w_min_9em.mql.media, "(min-width: 9em)", "serialization");
+ is(w_min_10em.mql.media, "(min-width: 10em)", "serialization");
+ is(w_max_9em.mql.media, "(max-width: 9em)", "serialization");
+ is(w_max_10em.mql.media, "(max-width: 10em)", "serialization");
+
+ function check_match(obj, expected, desc) {
+ is(obj.mql.matches, expected,
+ obj.str + " media query list .matches " + desc);
+ if (obj.notifyCount & 1) { // odd notifications only
+ is(obj.lastOddMatchResult, expected,
+ obj.str + " media query list last notify result " + desc);
+ }
+ }
+ function check_notify(obj, expected, desc) {
+ is(obj.notifyCount, expected,
+ obj.str + " media query list .notify count " + desc);
+ }
+ check_match(w_exact_w, true, "initially");
+ check_notify(w_exact_w, 0, "initially");
+ check_match(w_min_9em, true, "initially");
+ check_notify(w_min_9em, 0, "initially");
+ check_match(w_min_10em, false, "initially");
+ check_notify(w_min_10em, 0, "initially");
+ check_match(w_max_9em, false, "initially");
+ check_notify(w_max_9em, 0, "initially");
+ check_match(w_max_10em, true, "initially");
+ check_notify(w_max_10em, 0, "initially");
+
+ var w2 = Math.floor(em_size * 10.3);
+ iframe.style.width = w2 + "px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ check_match(w_exact_w, false, "after width increase to around 10.3em");
+ check_notify(w_exact_w, 1, "after width increase to around 10.3em");
+ check_match(w_min_9em, true, "after width increase to around 10.3em");
+ check_notify(w_min_9em, 0, "after width increase to around 10.3em");
+ check_match(w_min_10em, true, "after width increase to around 10.3em");
+ check_notify(w_min_10em, 1, "after width increase to around 10.3em");
+ check_match(w_max_9em, false, "after width increase to around 10.3em");
+ check_notify(w_max_9em, 0, "after width increase to around 10.3em");
+ check_match(w_max_10em, false, "after width increase to around 10.3em");
+ check_notify(w_max_10em, 1, "after width increase to around 10.3em");
+
+ var w3 = w * 2;
+ iframe.style.width = w3 + "px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ check_match(w_exact_w, false, "after width double from original");
+ check_notify(w_exact_w, 1, "after width double from original");
+ check_match(w_min_9em, true, "after width double from original");
+ check_notify(w_min_9em, 0, "after width double from original");
+ check_match(w_min_10em, true, "after width double from original");
+ check_notify(w_min_10em, 1, "after width double from original");
+ check_match(w_max_9em, false, "after width double from original");
+ check_notify(w_max_9em, 0, "after width double from original");
+ check_match(w_max_10em, false, "after width double from original");
+ check_notify(w_max_10em, 1, "after width double from original");
+
+ SpecialPowers.setFullZoom(subwin, 2.0);
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ check_match(w_exact_w, true, "after zoom");
+ check_notify(w_exact_w, 2, "after zoom");
+ check_match(w_min_9em, true, "after zoom");
+ check_notify(w_min_9em, 0, "after zoom");
+ check_match(w_min_10em, false, "after zoom");
+ check_notify(w_min_10em, 2, "after zoom");
+ check_match(w_max_9em, false, "after zoom");
+ check_notify(w_max_9em, 0, "after zoom");
+ check_match(w_max_10em, true, "after zoom");
+ check_notify(w_max_10em, 2, "after zoom");
+
+ SpecialPowers.setFullZoom(subwin, 1.0);
+
+ await tick();
+
+ finish_mql(w_exact_w);
+ finish_mql(w_min_9em);
+ finish_mql(w_min_10em);
+ finish_mql(w_max_9em);
+ finish_mql(w_max_10em);
+
+ // Additional tests of listener mutation.
+ {
+ let received = [];
+ let received_mql = [];
+ function listener1(event) {
+ received.push(1);
+ received_mql.push(event.target);
+ }
+ function listener2(event) {
+ received.push(2);
+ received_mql.push(event.target);
+ }
+
+ iframe.style.width = "200px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ let mql = subwin.matchMedia("(min-width: 150px)");
+ mql.addListener(listener1);
+ mql.addListener(listener1);
+ mql.addListener(listener2);
+ is(JSON.stringify(received), "[]", "listeners before notification");
+
+ iframe.style.width = "100px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ is(JSON.stringify(received), "[1,2]", "duplicate listeners removed");
+ received = [];
+ mql.removeListener(listener1);
+
+ iframe.style.width = "200px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ is(JSON.stringify(received), "[2]", "listener removal");
+ received = [];
+ mql.addListener(listener1);
+
+ iframe.style.width = "100px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ is(JSON.stringify(received), "[2,1]", "listeners notified in order");
+ received = [];
+ mql.addListener(listener2);
+
+ iframe.style.width = "200px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ is(JSON.stringify(received), "[2,1]", "add of existing listener is no-op");
+ received = [];
+ mql.addListener(listener1);
+
+ iframe.style.width = "100px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ is(JSON.stringify(received), "[2,1]", "add of existing listener is no-op");
+ mql.removeListener(listener2);
+ received = [];
+ received_mql = [];
+
+ var mql2 = subwin.matchMedia("(min-width: 160px)");
+ mql2.addListener(listener1);
+ mql.addListener(listener2);
+
+ iframe.style.width = "200px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ // mql (1, 2), mql2 (1)
+ is(JSON.stringify(received), "[1,2,1]",
+ "notification of lists in order created");
+ is(received_mql[0], mql,
+ "notification of lists in order created");
+ is(received_mql[1], mql,
+ "notification of lists in order created");
+ is(received_mql[2], mql2,
+ "notification of lists in order created");
+ received = [];
+ received_mql = [];
+
+ function removing_listener(event) {
+ received.push(3);
+ received_mql.push(event.target);
+ event.target.removeListener(listener2);
+ mql2.removeListener(listener1);
+ }
+
+ mql.addListener(removing_listener);
+ mql.removeListener(listener2);
+ mql.addListener(listener2); // after removing_listener (3)
+
+ iframe.style.width = "100px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ // mql(1, 3)
+ is(JSON.stringify(received), "[1,3]",
+ "listeners still notified after removed if change was before");
+ is(received_mql[0], mql,
+ "notification order (removal tests)");
+ is(received_mql[1], mql,
+ "notification order (removal tests)");
+ received = [];
+ received_mql = [];
+
+ iframe.style.width = "200px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ // mql(1, 3)
+ is(JSON.stringify(received), "[1,3]",
+ "listeners not notified for changes after their removal");
+ is(received_mql[0], mql,
+ "notification order (removal tests)");
+ is(received_mql[1], mql,
+ "notification order (removal tests)");
+ }
+
+ /* Bug 753777: test that things work in a freshly-created iframe */
+ {
+ let newIframe = document.createElement("iframe");
+ document.body.appendChild(newIframe);
+
+ is(newIframe.contentWindow.matchMedia("all").matches, true,
+ "matchMedia should work in newly-created iframe");
+ is(newIframe.contentWindow.matchMedia("(min-width: 1px)").matches, true,
+ "(min-width: 1px) should match in newly-created iframe");
+ is(newIframe.contentWindow.matchMedia("(max-width: 1px)").matches, false,
+ "(max-width: 1px) should not match in newly-created iframe");
+
+ document.body.removeChild(newIframe);
+ }
+
+ /* Bug 716751: listeners lost due to GC */
+ var gc_received = [];
+ {
+ let received = [];
+ let listener1 = function(event) {
+ gc_received.push(1);
+ }
+
+ iframe.style.width = "200px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ let mql = subwin.matchMedia("(min-width: 150px)");
+ mql.addListener(listener1);
+ is(JSON.stringify(gc_received), "[]", "GC test: before notification");
+
+ iframe.style.width = "100px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ is(JSON.stringify(gc_received), "[1]", "GC test: after notification 1");
+
+ // Because of conservative GC, we need to go back to the event loop
+ // to GC properly.
+ setTimeout(step2, 0);
+ }
+
+ async function step2() {
+ SpecialPowers.DOMWindowUtils.garbageCollect();
+
+ iframe.style.width = "200px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ is(JSON.stringify(gc_received), "[1,1]", "GC test: after notification 2");
+
+ bug1270626();
+ }
+
+ /* Bug 1270626: listeners that throw exceptions */
+ async function bug1270626() {
+ var throwingListener = function(event) {
+ throw "error";
+ }
+
+ iframe.style.width = "200px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ var mql = subwin.matchMedia("(min-width: 150px)");
+ mql.addListener(throwingListener);
+
+ SimpleTest.expectUncaughtException(true);
+ is(SimpleTest.isExpectingUncaughtException(), true,
+ "should be waiting for an uncaught exception");
+
+ iframe.style.width = "100px";
+ subroot.offsetWidth; // flush layout
+ await tick();
+
+ is(SimpleTest.isExpectingUncaughtException(), false,
+ "should have gotten an uncaught exception");
+
+ SimpleTest.finish();
+ }
+}
+
+</script>
+</pre>
+</body>
+</html>
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-23 15:53:37 +0000