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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /dom/flex/test/chrome/test_flex_items.html
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+<style>
+ .container {
+ display: flex;
+ background-color: grey;
+ font: 14px sans-serif;
+ height: 50px;
+ }
+ #flex-sanity {
+ /* This just needs to be large enough so that no shrinking is required. */
+ width: 1600px;
+ }
+ .clamped-huge-item {
+ flex: 1 1 1650px; /* This needs to be bigger than #flex-sanity, to test
+ the scenario it's aiming to test (early clamping of a
+ flex item which, if left unclamped, would've reversed
+ the direction of flexing & made everything shrink). */
+ max-width: 10px;
+ }
+
+ .base { align-self: baseline; }
+ .lastbase { align-self: last baseline; }
+
+ .offset { margin-top: 10px;
+ margin-bottom: 3px; }
+
+ .lime { background: lime; }
+ .yellow { background: yellow; }
+ .orange { background: orange; }
+ .pink { background: pink; }
+ .tan { background: tan; }
+ .white { background: white; }
+
+ .crossMinMax { min-height: 40px;
+ max-height: 120px; }
+
+ .mainMinMax { min-width: 120px;
+ max-width: 500px; }
+
+ .flexGrow { flex-grow: 1; }
+ .spacer150 { width: 150px;
+ box-sizing: border-box;
+ height: 10px;
+ border: 1px solid teal; }
+
+</style>
+
+<script>
+"use strict";
+
+SimpleTest.waitForExplicitFinish();
+
+const TEXT_NODE = Node.TEXT_NODE;
+
+function testItemMatchesExpectedValues(item, values, index) {
+ if (typeof(values.node) != "undefined") {
+ is(item.node, values.node, "Item index " + index + " has expected node.");
+ }
+
+ if (typeof(values.mainBaseSize) != "undefined") {
+ is(item.mainBaseSize, values.mainBaseSize, "Item index " + index + " has expected mainBaseSize.");
+ }
+
+ if (typeof(values.mainDeltaSize) != "undefined") {
+ is(item.mainDeltaSize, values.mainDeltaSize, "Item index " + index + " has expected mainDeltaSize.");
+ }
+
+ if (typeof(values.mainMinSize) != "undefined") {
+ is(item.mainMinSize, values.mainMinSize, "Item index " + index + " has expected mainMinSize.");
+ }
+
+ if (typeof(values.mainMaxSize) != "undefined") {
+ is(item.mainMaxSize, values.mainMaxSize, "Item index " + index + " has expected mainMaxSize.");
+ } else {
+ // If we didn't specify an expected mainMaxSize, then it's implied
+ // that the max main-size property (max-width/max-height) is at its
+ // default "none" value, which our FlexItem API represents as +infinity.
+ is(item.mainMaxSize, Number.POSITIVE_INFINITY,
+ "Item index " + index + " has expected (default) mainMaxSize.");
+ }
+
+ if (typeof(values.crossMinSize) != "undefined") {
+ is(item.crossMinSize, values.crossMinSize, "Item index " + index + " has expected crossMinSize.");
+ }
+
+ if (typeof(values.crossMaxSize) != "undefined") {
+ is(item.crossMaxSize, values.crossMaxSize, "Item index " + index + " has expected crossMaxSize.");
+ } else {
+ // As above for mainMaxSize, no-expected-value implies we expect +infinity.
+ is(item.crossMaxSize, Number.POSITIVE_INFINITY,
+ "Item index " + index + " has expected (default) crossMaxSize.");
+ }
+}
+
+// Test for items in "flex-sanity" flex container:
+function testFlexSanity() {
+ let container = document.getElementById("flex-sanity");
+ let flex = container.getAsFlexContainer();
+ let lines = flex.getLines();
+ is(lines.length, 1, "Container should have expected number of lines.");
+
+ let line = lines[0];
+ let containerHeight = container.getBoundingClientRect().height;
+ is(line.crossSize, containerHeight,
+ "Line crossSize should equal the height of the container.");
+
+ // We can't compare baselines precisely, so we'll just confirm that they
+ // appear somewhere within the elements that determine them.
+ // (This assumes the first rect is baseline-aligned.)
+ let firstRect = container.firstElementChild.getBoundingClientRect();
+ ok(line.firstBaselineOffset > firstRect.top &&
+ line.firstBaselineOffset < firstRect.bottom,
+ "Line firstBaselineOffset should land somewhere within the element " +
+ "that determines it.");
+
+ // For last baseline, it's measured from the bottom, so we have to compare
+ // against the element bounds subtracted from the container height.
+ // We use the first node which uses last-baseline ("lb") alignment to
+ // provide the rect:
+ let lbElem = document.querySelector(".lastbase");
+ let lbElemBoundingRect = lbElem.getBoundingClientRect();
+ ok(line.lastBaselineOffset > containerHeight - lbElemBoundingRect.bottom &&
+ line.lastBaselineOffset < containerHeight - lbElemBoundingRect.top,
+ "Line lastBaselineOffset should land somewhere within the element" +
+ "that determines it.");
+
+ let expectedValues = [
+ { crossMinSize: 0 },
+ { mainBaseSize: 100,
+ mainDeltaSize: 0 },
+ { crossMinSize: 40,
+ crossMaxSize: 120,
+ mainDeltaSize: 0 },
+ { mainMinSize: 120,
+ mainMaxSize: 500,
+ mainDeltaSize: 0 },
+ { mainMinSize: 120,
+ mainMaxSize: 500,
+ mainBaseSize: 150,
+ mainDeltaSize: 0 },
+ { mainBaseSize: 10,
+ mainMaxSize: 5,
+ mainDeltaSize: 0 },
+ { mainBaseSize: 10,
+ mainMinSize: 15,
+ mainDeltaSize: 0 },
+ { mainBaseSize: 50,
+ mainMaxSize: 10 },
+ { mainBaseSize: 1650,
+ mainMaxSize: 10,
+ mainDeltaSize: 0 },
+ { mainDeltaSize: 0 },
+ { /* final item is anonymous flex item */ },
+ ];
+
+ let items = line.getItems();
+ is(items.length, expectedValues.length,
+ "Line should have expected number of items.");
+ is(items.length, container.children.length + 1,
+ "Line should have as many items as the flex container has child elems, " +
+ "plus 1 for anonymous flex item");
+
+ for (let i = 0; i < items.length; ++i) {
+ let item = items[i];
+ let values = expectedValues[i];
+ // set the expected node to the node we're currently iterating over,
+ // except for:
+ // - the display:contents element (whose item is its first child)
+ // - the final item (which is an anonymous flex item around text)
+ if (i < container.children.length) {
+ let curElem = container.children[i];
+ values.node = (curElem.style.display == "contents"
+ ? curElem.firstElementChild
+ : curElem);
+ } else {
+ is(container.lastChild.nodeType, TEXT_NODE,
+ "container's last child should be a text node");
+ values.node = container.lastChild;
+ }
+ testItemMatchesExpectedValues(item, values, i);
+ }
+
+ // Check that the delta size of the first item is (roughly) equal to the
+ // actual size minus the base size.
+ isfuzzy(items[0].mainDeltaSize, firstRect.width - items[0].mainBaseSize, 1e-4,
+ "flex-grow item should have expected mainDeltaSize.");
+}
+
+// Test for items in "flex-growing" flex container:
+function testFlexGrowing() {
+ let expectedValues = [
+ { mainBaseSize: 10,
+ mainDeltaSize: 10,
+ mainMinSize: 35 },
+ { mainBaseSize: 20,
+ mainDeltaSize: 5,
+ mainMinSize: 28 },
+ { mainBaseSize: 30,
+ mainDeltaSize: 7 },
+ { mainBaseSize: 0,
+ mainDeltaSize: 48,
+ mainMaxSize: 20 },
+ ];
+
+ let container = document.getElementById("flex-growing");
+ let items = container.getAsFlexContainer().getLines()[0].getItems();
+ is(items.length, container.children.length,
+ "Line should have as many items as the flex container has child elems");
+
+ for (let i = 0; i < items.length; ++i) {
+ let item = items[i];
+ let values = expectedValues[i];
+ testItemMatchesExpectedValues(item, values, i);
+ }
+}
+
+function runTests() {
+ testFlexSanity();
+ testFlexGrowing();
+ SimpleTest.finish();
+}
+</script>
+</head>
+
+<body onLoad="runTests();">
+ <!-- First flex container to be tested: "flex-sanity".
+ We test a few general things, e.g.:
+ - accuracy of reported baselines.
+ - accuracy of reported flex base size, min/max sizes, & trivial deltas.
+ - flex items formation for display:contents subtrees & text nodes.
+ -->
+ <div id="flex-sanity" class="container">
+ <div class="lime base flexGrow">one line (first)</div>
+ <div class="yellow lastbase" style="width: 100px">one line (last)</div>
+ <div class="orange offset lastbase crossMinMax">two<br/>lines and offset (last)</div>
+ <div class="pink offset base mainMinMax">offset (first)</div>
+ <!-- Inflexible item w/ content-derived flex base size, which has min/max
+ but doesn't violate them: -->
+ <div class="tan mainMinMax">
+ <div class="spacer150"></div>
+ </div>
+ <!-- Inflexible item that is trivially clamped to smaller max-width: -->
+ <div style="flex: 0 0 10px; max-width: 5px"></div>
+ <!-- Inflexible item that is trivially clamped to larger min-width: -->
+ <div style="flex: 0 0 10px; min-width: 15px"></div>
+ <!-- Item that wants to grow but is trivially clamped to max-width
+ below base size: -->
+ <div style="flex: 1 1 50px; max-width: 10px"></div>
+ <div class="clamped-huge-item"></div>
+ <div style="display:contents">
+ <div class="white">replaced</div>
+ </div>
+ anon item for text
+ </div>
+
+ <!-- Second flex container to be tested, with items that grow by specific
+ predictable amounts. This ends up triggering 4 passes of the main
+ flexbox layout algorithm loop - and note that for each item, we only
+ report (via 'mainDeltaSize') the delta that it wanted in the *last pass
+ of the loop before that item was frozen*.
+
+ Here's what goes on in each pass (and the tentative deltas)
+ * PASS 1
+ - Available space = 120 - 10 - 20 - 30 - 0 = 60px.
+ - Sum of flex values = 1+1+2+16 = 20. So 1 "share" is 60px/20 = 3px.
+ - Deltas (space distributed): +3px, +3px, +6px, +48px
+ VIOLATIONS:
+ item0 is now 10+3 = 13px, which under its min
+ item1 is now 20+3 = 23px, which under its min
+ item3 is now 0+48 = 48px, which over its max
+ - the magnitude of max-violations (how far we're out of bounds) exceeds
+ magnitude of min-violations, so we prioritize the max-violations.
+ - So we freeze item3 at its max-width, 20px, leaving its final "desired"
+ mainDeltaSize at +48px from this pass.
+
+ * PASS 2
+ - Available space = 120 - 10 - 20 - 30 - 20 = 40px.
+ - Sum of flex values = 1+1+2 = 4. So 1 "share" is 40px/4 = 10px.
+ - Deltas (space distributed): +10px, +10px, +20px, +0px.
+ VIOLATIONS:
+ item0 is now 10+10 = 20px, which is under its min
+ - So we freeze item0 at its min-width, 35px, leaving its final "desired"
+ mainDeltaSize at +10px from this pass.
+
+ * PASS 3
+ - Available space = 120 - 35 - 20 - 30 - 20 = 15px.
+ - Sum of flex values = 1+2 = 3. So 1 "share" is 15px/3 = 5px.
+ - Deltas (space distributed): +0px, +5px, +10px, +0px.
+ VIOLATIONS:
+ item1 is now 20+5 = 25px, which is under its min
+ - So we freeze item1 at its min-width, 28px, leaving its final "desired"
+ mainDeltaSize at +5px from this pass.
+
+ * PASS 4
+ - Available space = 120 - 35 - 28 - 30 - 20 = 7px.
+ - Sum of flex values = 2. So 1 "share" is 7px/2 = 3.5px
+ - Deltas (space distributed): +0px, +0px, +7px, +0px.
+ VIOLATIONS:
+ None! (So, we'll be done after this pass!)
+ - So we freeze item2 (the only unfrozen item) at its flexed size, 37px,
+ and set its final "desired" mainDeltaSize to +7px from this pass.
+ - And we're done!
+ -->
+ <div id="flex-growing" class="container" style="width: 120px">
+ <div style="flex: 1 10px; min-width: 35px"></div>
+ <div style="flex: 1 20px; min-width: 28px"></div>
+ <div style="flex: 2 30px; min-width: 0"></div>
+ <div style="flex: 16 0px; max-width: 20px"></div>
+ </div>
+</body>
+</html>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 13:34:49 +0000