| <!doctype html> |
| <meta charset="utf-8"> |
| <link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#background-position"> |
| <meta name="test" content="background-position animation handles origin parameters"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/support/interpolation-testcommon.js"></script> |
| |
| <style> |
| .parent { |
| background-position: 80px 80px; |
| } |
| .target { |
| border: 3px solid skyblue; |
| width: 100px; |
| height: 100px; |
| background-image: linear-gradient(to right, green, green); |
| background-size: 20px 20px; |
| background-repeat: no-repeat; |
| background-position: 10px 10px; |
| display: inline-block; |
| } |
| |
| .actual { |
| background-image: linear-gradient(to right, red, red); |
| } |
| .expected { |
| margin-left: -106px; |
| } |
| </style> |
| |
| <body></body> |
| |
| <script> |
| // neutral |
| test_interpolation({ |
| property: 'background-position', |
| from: neutralKeyframe, |
| to: 'left 20px top 20px', |
| }, [ |
| {at: 0, expect: '10px 10px'}, |
| {at: 0.25, expect: '12.5px 12.5px'}, |
| {at: 0.5, expect: '15px 15px'}, |
| {at: 0.75, expect: '17.5px 17.5px'}, |
| {at: 1, expect: '20px 20px'}, |
| ]); |
| |
| // initial |
| test_interpolation({ |
| property: 'background-position', |
| from: 'initial', |
| to: 'left 20px top 20px', |
| }, [ |
| {at: 0, expect: '0% 0%'}, |
| {at: 0.25, expect: '5px 5px'}, |
| {at: 0.5, expect: '10px 10px'}, |
| {at: 0.75, expect: '15px 15px'}, |
| {at: 1, expect: '20px 20px'}, |
| ]); |
| |
| // inherit |
| test_interpolation({ |
| property: 'background-position', |
| from: 'inherit', |
| to: 'left 20px top 20px', |
| }, [ |
| {at: 0, expect: '80px 80px'}, |
| {at: 0.25, expect: '65px 65px'}, |
| {at: 0.5, expect: '50px 50px'}, |
| {at: 0.75, expect: '35px 35px'}, |
| {at: 1, expect: '20px 20px'}, |
| ]); |
| |
| // unset |
| test_interpolation({ |
| property: 'background-position', |
| from: 'unset', |
| to: 'left 20px top 20px', |
| }, [ |
| {at: 0, expect: '0% 0%'}, |
| {at: 0.25, expect: '5px 5px'}, |
| {at: 0.5, expect: '10px 10px'}, |
| {at: 0.75, expect: '15px 15px'}, |
| {at: 1, expect: '20px 20px'}, |
| ]); |
| |
| // left-top |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'left 20px top 20px', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: 'calc(5px + 37.5%) calc(5px + 37.5%)'}, |
| {at: 0.5, expect: 'calc(10px + 25%) calc(10px + 25%)'}, |
| {at: 0.75, expect: 'calc(15px + 12.5%) calc(15px + 12.5%)'}, |
| {at: 1, expect: '20px 20px'}, |
| ]); |
| |
| // center-top |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'center top 20px', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: '50% calc(5px + 37.5%)'}, |
| {at: 0.5, expect: '50% calc(10px + 25%)'}, |
| {at: 0.75, expect: '50% calc(15px + 12.5%)'}, |
| {at: 1, expect: '50% 20px'}, |
| ]); |
| |
| // right-top |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'right 20px top 20px', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: 'calc(-5px + 62.5%) calc(5px + 37.5%)'}, |
| {at: 0.5, expect: 'calc(-10px + 75%) calc(10px + 25%)'}, |
| {at: 0.75, expect: 'calc(-15px + 87.5%) calc(15px + 12.5%)'}, |
| {at: 1, expect: 'calc(-20px + 100%) 20px'}, |
| ]); |
| |
| // left-center |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'left 20px center', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: 'calc(5px + 37.5%) 50%'}, |
| {at: 0.5, expect: 'calc(10px + 25%) 50%'}, |
| {at: 0.75, expect: 'calc(15px + 12.5%) 50%'}, |
| {at: 1, expect: '20px 50%'}, |
| ]); |
| |
| // center-center |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'center center', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: '50% 50%'}, |
| {at: 0.5, expect: '50% 50%'}, |
| {at: 0.75, expect: '50% 50%'}, |
| {at: 1, expect: '50% 50%'}, |
| ]); |
| |
| // right-center |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'right 20px center', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: 'calc(-5px + 62.5%) 50%'}, |
| {at: 0.5, expect: 'calc(-10px + 75%) 50%'}, |
| {at: 0.75, expect: 'calc(-15px + 87.5%) 50%'}, |
| {at: 1, expect: 'calc(-20px + 100%) 50%'}, |
| ]); |
| |
| // left-bottom |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'left 20px bottom 20px', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: 'calc(5px + 37.5%) calc(-5px + 62.5%)'}, |
| {at: 0.5, expect: 'calc(10px + 25%) calc(-10px + 75%)'}, |
| {at: 0.75, expect: 'calc(15px + 12.5%) calc(-15px + 87.5%)'}, |
| {at: 1, expect: '20px calc(-20px + 100%)'}, |
| ]); |
| |
| // center-bottom |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'center bottom 20px', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: '50% calc(-5px + 62.5%)'}, |
| {at: 0.5, expect: '50% calc(-10px + 75%)'}, |
| {at: 0.75, expect: '50% calc(-15px + 87.5%)'}, |
| {at: 1, expect: '50% calc(-20px + 100%)'}, |
| ]); |
| |
| // right-bottom |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center center', |
| to: 'right 20px bottom 20px', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: 'calc(-5px + 62.5%) calc(-5px + 62.5%)'}, |
| {at: 0.5, expect: 'calc(-10px + 75%) calc(-10px + 75%)'}, |
| {at: 0.75, expect: 'calc(-15px + 87.5%) calc(-15px + 87.5%)'}, |
| {at: 1, expect: 'calc(-20px + 100%) calc(-20px + 100%)'}, |
| ]); |
| |
| // Single values |
| test_interpolation({ |
| property: 'background-position', |
| from: 'center', |
| to: 'bottom', |
| }, [ |
| {at: 0, expect: '50% 50%'}, |
| {at: 0.25, expect: '50% 62.5%'}, |
| {at: 0.5, expect: '50% 75%'}, |
| {at: 0.75, expect: '50% 87.5%'}, |
| {at: 1, expect: '50% 100%'}, |
| ]); |
| </script> |
