| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>offset-rotate composition</title> |
| <link rel="author" title="Eric Willigers" href="mailto:ericwilligers@chromium.org"> |
| <link rel="help" href="https://drafts.fxtf.org/motion-1/#offset-rotate-property"> |
| <meta name="assert" content="offset-rotate supports animation."> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/support/interpolation-testcommon.js"></script> |
| |
| <body> |
| <script> |
| // Angle rotations compose. |
| test_composition({ |
| property: 'offset-rotate', |
| underlying: '20deg', |
| addFrom: '10deg', |
| addTo: '20deg', |
| }, [ |
| {at: -0.3, expect: '27deg'}, |
| {at: 0, expect: '30deg'}, |
| {at: 0.3, expect: '33deg'}, |
| {at: 0.6, expect: '36deg'}, |
| {at: 1, expect: '40deg'}, |
| {at: 1.5, expect: '45deg'}, |
| ]); |
| |
| // Angle rotations don't compose with underlying 'auto'. |
| test_composition({ |
| property: 'offset-rotate', |
| underlying: 'auto 20deg', |
| addFrom: '10deg', |
| addTo: '20deg', |
| }, [ |
| {at: -0.3, expect: '7deg'}, |
| {at: 0, expect: '10deg'}, |
| {at: 0.3, expect: '13deg'}, |
| {at: 0.6, expect: '16deg'}, |
| {at: 1, expect: '20deg'}, |
| {at: 1.5, expect: '25deg'}, |
| ]); |
| |
| // Auto rotations compose with underlying 'auto'. |
| test_composition({ |
| property: 'offset-rotate', |
| underlying: 'auto 20deg', |
| addFrom: 'reverse 10deg', |
| addTo: 'auto 20deg', |
| }, [ |
| {at: -0.3, expect: 'auto 261deg'}, |
| {at: 0, expect: 'auto 210deg'}, |
| {at: 0.3, expect: 'auto 159deg'}, |
| {at: 0.6, expect: 'auto 108deg'}, |
| {at: 1, expect: 'auto 40deg'}, |
| {at: 1.5, expect: 'auto -45deg'}, |
| ]); |
| |
| // When we can't interpolate, we can't compose. |
| test_composition({ |
| property: 'offset-rotate', |
| underlying: '20deg', |
| addFrom: 'reverse 10deg', |
| addTo: '20deg', |
| }, [ |
| {at: -0.3, expect: 'auto 190deg'}, |
| {at: 0, expect: 'auto 190deg'}, |
| {at: 0.3, expect: 'auto 190deg'}, |
| {at: 0.6, expect: '40deg'}, |
| {at: 1, expect: '40deg'}, |
| {at: 1.5, expect: '40deg'}, |
| ]); |
| |
| test_composition({ |
| property: 'offset-rotate', |
| underlying: '20deg', |
| replaceFrom: 'reverse 10deg', |
| addTo: '20deg', |
| }, [ |
| {at: -0.3, expect: 'auto 190deg'}, |
| {at: 0, expect: 'auto 190deg'}, |
| {at: 0.3, expect: 'auto 190deg'}, |
| {at: 0.6, expect: '40deg'}, |
| {at: 1, expect: '40deg'}, |
| {at: 1.5, expect: '40deg'}, |
| ]); |
| |
| // Angle rotations compose with underlying angle. |
| test_composition({ |
| property: 'offset-rotate', |
| underlying: '20deg', |
| addFrom: '10deg', |
| replaceTo: '10deg', |
| }, [ |
| {at: -0.3, expect: '36deg'}, |
| {at: 0, expect: '30deg'}, |
| {at: 0.3, expect: '24deg'}, |
| {at: 0.6, expect: '18deg'}, |
| {at: 1, expect: '10deg'}, |
| {at: 1.5, expect: '0deg'}, |
| ]); |
| </script> |
| </body> |