60 lines
2.2 KiB
HTML
60 lines
2.2 KiB
HTML
<!DOCTYPE html>
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<title>CSS Anchor Positioning: try-tactic under different writing modes</title>
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<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#typedef-position-try-fallbacks-try-tactic">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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@position-try --pf {
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left:10px;
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top:20px;
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}
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#cb {
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position: absolute;
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width: 400px;
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height: 400px;
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border: 1px solid black;
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}
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#target {
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position: absolute;
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left: 99999px; /* force fallback */
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width: 30px;
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height: 40px;
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background-color: skyblue;
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}
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</style>
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<div id=cb>
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<div id=target></div>
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</div>
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<script>
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function test_try_tactic_wm(try_tactic, writing_mode, direction, expected_offsets) {
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target.style.positionTryFallbacks = `--pf ${try_tactic}`;
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target.style.writingMode = writing_mode;
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target.style.direction = direction;
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test(() => {
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assert_equals(target.offsetLeft, expected_offsets.left, 'offsetLeft');
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assert_equals(target.offsetTop, expected_offsets.top, 'offsetTop');
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assert_equals(target.offsetWidth, expected_offsets.width, 'offsetWidth');
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assert_equals(target.offsetHeight, expected_offsets.height, 'offsetHeight');
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}, `${try_tactic} ${writing_mode} ${direction}`);
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}
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test_try_tactic_wm('', 'horizontal-tb', 'ltr', {left:10, top:20, width:30, height:40});
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// Effectively flips left:10px to right:10px:
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test_try_tactic_wm('flip-inline', 'horizontal-tb', 'ltr', {left:360, top:20, width:30, height:40});
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// Effectively flips top:20px to bottom:20px:
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test_try_tactic_wm('flip-inline', 'vertical-lr', 'ltr', {left:10, top:340, width:30, height:40});
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test_try_tactic_wm('flip-inline', 'sideways-lr', 'ltr', {left:10, top:340, width:30, height:40});
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// Effectively flips left:10px to right:10px:
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test_try_tactic_wm('flip-block', 'sideways-rl', 'ltr', {left:360, top:20, width:30, height:40});
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// Mirror across the [left,top]=>[bottom,right] diagonal:
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test_try_tactic_wm('flip-start', 'horizontal-tb', 'ltr', {left:20, top:10, width:40, height:30});
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// Mirror across the [right,top]=>[bottom,left] diagonal:
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test_try_tactic_wm('flip-start', 'horizontal-tb', 'rtl', {left:340, top:360, width:40, height:30});
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</script>
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