| <!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 supports animation as a repeatable list"> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/support/interpolation-testcommon.js"></script> |
| |
| <style> |
| .parent { |
| background-position: 60px 60px; |
| } |
| .target { |
| width: 120px; |
| height: 120px; |
| display: inline-block; |
| border: 2px solid black; |
| background-repeat: no-repeat; |
| background-image: radial-gradient(20px circle at 20px 20px, red 18px, transparent), |
| radial-gradient(20px circle at 20px 20px, yellow 18px, transparent), |
| radial-gradient(20px circle at 20px 20px, lime 18px, transparent), |
| radial-gradient(20px circle at 20px 20px, blue 18px, transparent); |
| background-position: 40px 40px; |
| } |
| .expected { |
| margin-right: 10px; |
| } |
| </style> |
| |
| <body></body> |
| |
| <script> |
| test_interpolation({ |
| property: 'background-position', |
| from: neutralKeyframe, |
| to: '80px 80px, 80px 80px, 80px 80px, 80px 80px', |
| }, [ |
| {at: -0.25, expect: '30px 30px, 30px 30px, 30px 30px, 30px 30px'}, |
| {at: 0, expect: '40px 40px, 40px 40px, 40px 40px, 40px 40px'}, |
| {at: 0.25, expect: '50px 50px, 50px 50px, 50px 50px, 50px 50px'}, |
| {at: 0.5, expect: '60px 60px, 60px 60px, 60px 60px, 60px 60px'}, |
| {at: 0.75, expect: '70px 70px, 70px 70px, 70px 70px, 70px 70px'}, |
| {at: 1, expect: '80px 80px, 80px 80px, 80px 80px, 80px 80px'}, |
| {at: 1.25, expect: '90px 90px, 90px 90px, 90px 90px, 90px 90px'}, |
| ]); |
| |
| // background-position's initial value is 0% 0%, and calcs involving percentages |
| // are never resolved by the calc spec (even when the percentage is 0%). |
| test_interpolation({ |
| property: 'background-position', |
| from: 'initial', |
| to: '80px 80px, 80px 80px, 80px 80px, 80px 80px', |
| }, [ |
| {at: -0.25, expect: 'calc(0% - 20px) calc(0% - 20px), calc(0% - 20px) calc(0% - 20px), calc(0% - 20px) calc(0% - 20px), calc(0% - 20px) calc(0% - 20px)'}, |
| {at: 0, expect: '0% 0%, 0% 0%, 0% 0%, 0% 0%'}, |
| {at: 0.25, expect: 'calc(0% + 20px) calc(0% + 20px), calc(0% + 20px) calc(0% + 20px), calc(0% + 20px) calc(0% + 20px), calc(0% + 20px) calc(0% + 20px)'}, |
| {at: 0.5, expect: 'calc(0% + 40px) calc(0% + 40px), calc(0% + 40px) calc(0% + 40px), calc(0% + 40px) calc(0% + 40px), calc(0% + 40px) calc(0% + 40px)'}, |
| {at: 0.75, expect: 'calc(0% + 60px) calc(0% + 60px), calc(0% + 60px) calc(0% + 60px), calc(0% + 60px) calc(0% + 60px), calc(0% + 60px) calc(0% + 60px)'}, |
| {at: 1, expect: 'calc(0% + 80px) calc(0% + 80px), calc(0% + 80px) calc(0% + 80px), calc(0% + 80px) calc(0% + 80px), calc(0% + 80px) calc(0% + 80px)'}, |
| {at: 1.25, expect: 'calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)'}, |
| ]); |
| |
| test_interpolation({ |
| property: 'background-position', |
| from: 'inherit', |
| to: '80px 80px, 80px 80px, 80px 80px, 80px 80px', |
| }, [ |
| {at: -0.25, expect: '55px 55px, 55px 55px, 55px 55px, 55px 55px'}, |
| {at: 0, expect: '60px 60px, 60px 60px, 60px 60px, 60px 60px'}, |
| {at: 0.25, expect: '65px 65px, 65px 65px, 65px 65px, 65px 65px'}, |
| {at: 0.5, expect: '70px 70px, 70px 70px, 70px 70px, 70px 70px'}, |
| {at: 0.75, expect: '75px 75px, 75px 75px, 75px 75px, 75px 75px'}, |
| {at: 1, expect: '80px 80px, 80px 80px, 80px 80px, 80px 80px'}, |
| {at: 1.25, expect: '85px 85px, 85px 85px, 85px 85px, 85px 85px'}, |
| ]); |
| |
| // background-position is not inherited, so 'unset' is equivalent to initial. |
| test_interpolation({ |
| property: 'background-position', |
| from: 'unset', |
| to: '80px 80px, 80px 80px, 80px 80px, 80px 80px', |
| }, [ |
| {at: -0.25, expect: 'calc(0% - 20px) calc(0% - 20px), calc(0% - 20px) calc(0% - 20px), calc(0% - 20px) calc(0% - 20px), calc(0% - 20px) calc(0% - 20px)'}, |
| {at: 0, expect: '0% 0%, 0% 0%, 0% 0%, 0% 0%'}, |
| {at: 0.25, expect: 'calc(0% + 20px) calc(0% + 20px), calc(0% + 20px) calc(0% + 20px), calc(0% + 20px) calc(0% + 20px), calc(0% + 20px) calc(0% + 20px)'}, |
| {at: 0.5, expect: 'calc(0% + 40px) calc(0% + 40px), calc(0% + 40px) calc(0% + 40px), calc(0% + 40px) calc(0% + 40px), calc(0% + 40px) calc(0% + 40px)'}, |
| {at: 0.75, expect: 'calc(0% + 60px) calc(0% + 60px), calc(0% + 60px) calc(0% + 60px), calc(0% + 60px) calc(0% + 60px), calc(0% + 60px) calc(0% + 60px)'}, |
| {at: 1, expect: 'calc(0% + 80px) calc(0% + 80px), calc(0% + 80px) calc(0% + 80px), calc(0% + 80px) calc(0% + 80px), calc(0% + 80px) calc(0% + 80px)'}, |
| {at: 1.25, expect: 'calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)'}, |
| ]); |
| |
| // Test equal number of position values as background images. |
| test_interpolation({ |
| property: 'background-position', |
| from: '0px 0px, 0px 0px, 0px 0px, 0px 0px', |
| to: '80px 80px, 80px 80px, 80px 80px, 80px 80px', |
| }, [ |
| {at: -0.25, expect: '-20px -20px, -20px -20px, -20px -20px, -20px -20px'}, |
| {at: 0, expect: ' 0px 0px, 0px 0px, 0px 0px, 0px 0px'}, |
| {at: 0.25, expect: ' 20px 20px, 20px 20px, 20px 20px, 20px 20px'}, |
| {at: 0.5, expect: ' 40px 40px, 40px 40px, 40px 40px, 40px 40px'}, |
| {at: 0.75, expect: ' 60px 60px, 60px 60px, 60px 60px, 60px 60px'}, |
| {at: 1, expect: ' 80px 80px, 80px 80px, 80px 80px, 80px 80px'}, |
| {at: 1.25, expect: '100px 100px, 100px 100px, 100px 100px, 100px 100px'}, |
| ]); |
| |
| // Test single position value repeated over background images. |
| test_interpolation({ |
| property: 'background-position', |
| from: 'top 0px left 0px', |
| to: 'left 80px top 80px', |
| }, [ |
| {at: -0.25, expect: '-20px -20px, -20px -20px, -20px -20px, -20px -20px'}, |
| {at: 0, expect: ' 0px 0px, 0px 0px, 0px 0px, 0px 0px'}, |
| {at: 0.25, expect: ' 20px 20px, 20px 20px, 20px 20px, 20px 20px'}, |
| {at: 0.5, expect: ' 40px 40px, 40px 40px, 40px 40px, 40px 40px'}, |
| {at: 0.75, expect: ' 60px 60px, 60px 60px, 60px 60px, 60px 60px'}, |
| {at: 1, expect: ' 80px 80px, 80px 80px, 80px 80px, 80px 80px'}, |
| {at: 1.25, expect: '100px 100px, 100px 100px, 100px 100px, 100px 100px'}, |
| ]); |
| |
| // Test mismatched numbers of position values. |
| test_interpolation({ |
| property: 'background-position', |
| from: '0px 0px, 80px 0px', |
| to: '40px 40px, 80px 80px, 0px 80px', |
| }, [ |
| {at: -0.25, expect: '-10px -10px, 80px -20px, 0px -20px, 90px -10px'}, |
| {at: 0, expect: ' 0px 0px, 80px 0px, 0px 0px, 80px 0px'}, |
| {at: 0.25, expect: ' 10px 10px, 80px 20px, 0px 20px, 70px 10px'}, |
| {at: 0.5, expect: ' 20px 20px, 80px 40px, 0px 40px, 60px 20px'}, |
| {at: 0.75, expect: ' 30px 30px, 80px 60px, 0px 60px, 50px 30px'}, |
| {at: 1, expect: ' 40px 40px, 80px 80px, 0px 80px, 40px 40px'}, |
| {at: 1.25, expect: ' 50px 50px, 80px 100px, 0px 100px, 30px 50px'}, |
| ]); |
| </script> |