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