| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>ScrollTimeline current time algorithm - interaction with writing modes</title> |
| <link rel="help" href="https://wicg.github.io/scroll-animations/#current-time-algorithm"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <script src="./resources/scrolltimeline-utils.js"></script> |
| |
| <body></body> |
| |
| <script> |
| 'use strict'; |
| |
| test(function() { |
| const scrollerOverrides = new Map([['direction', 'rtl']]); |
| const scroller = setupScrollTimelineTest(scrollerOverrides); |
| |
| // Set the timeRange such that currentTime maps directly to the value |
| // scrolled. The contents and scroller are square, so it suffices to compute |
| // one edge and use it for all the timelines. |
| const scrollerSize = scroller.scrollHeight - scroller.clientHeight; |
| |
| const blockScrollTimeline = new ScrollTimeline( |
| {scrollSource: scroller, timeRange: scrollerSize, orientation: 'block'}); |
| const inlineScrollTimeline = new ScrollTimeline( |
| {scrollSource: scroller, timeRange: scrollerSize, orientation: 'inline'}); |
| const horizontalScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal' |
| }); |
| const verticalScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'vertical' |
| }); |
| |
| // Unscrolled, all timelines should read a current time of 0 even though the |
| // X-axis will have started at the right hand side for rtl. |
| assert_equals( |
| blockScrollTimeline.currentTime, 0, 'Unscrolled block timeline'); |
| assert_equals( |
| inlineScrollTimeline.currentTime, 0, 'Unscrolled inline timeline'); |
| assert_equals( |
| horizontalScrollTimeline.currentTime, 0, |
| 'Unscrolled horizontal timeline'); |
| assert_equals( |
| verticalScrollTimeline.currentTime, 0, 'Unscrolled vertical timeline'); |
| |
| // The offset in the inline/horizontal direction should be inverted. The |
| // block/vertical direction should be unaffected. |
| scroller.scrollTop = 50; |
| scroller.scrollLeft = 75; |
| |
| assert_equals(blockScrollTimeline.currentTime, 50, 'Scrolled block timeline'); |
| assert_equals( |
| inlineScrollTimeline.currentTime, scrollerSize - 75, |
| 'Scrolled inline timeline'); |
| assert_equals( |
| horizontalScrollTimeline.currentTime, scrollerSize - 75, |
| 'Scrolled horizontal timeline'); |
| assert_equals( |
| verticalScrollTimeline.currentTime, 50, 'Scrolled vertical timeline'); |
| }, 'currentTime handles direction: rtl correctly'); |
| |
| test(function() { |
| const scrollerOverrides = new Map([['writing-mode', 'vertical-rl']]); |
| const scroller = setupScrollTimelineTest(scrollerOverrides); |
| |
| // Set the timeRange such that currentTime maps directly to the value |
| // scrolled. The contents and scroller are square, so it suffices to compute |
| // one edge and use it for all the timelines. |
| const scrollerSize = scroller.scrollHeight - scroller.clientHeight; |
| |
| const blockScrollTimeline = new ScrollTimeline( |
| {scrollSource: scroller, timeRange: scrollerSize, orientation: 'block'}); |
| const inlineScrollTimeline = new ScrollTimeline( |
| {scrollSource: scroller, timeRange: scrollerSize, orientation: 'inline'}); |
| const horizontalScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal' |
| }); |
| const verticalScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'vertical' |
| }); |
| |
| // Unscrolled, all timelines should read a current time of 0 even though the |
| // X-axis will have started at the right hand side for vertical-rl. |
| assert_equals( |
| blockScrollTimeline.currentTime, 0, 'Unscrolled block timeline'); |
| assert_equals( |
| inlineScrollTimeline.currentTime, 0, 'Unscrolled inline timeline'); |
| assert_equals( |
| horizontalScrollTimeline.currentTime, 0, |
| 'Unscrolled horizontal timeline'); |
| assert_equals( |
| verticalScrollTimeline.currentTime, 0, 'Unscrolled vertical timeline'); |
| |
| // For vertical-rl, the X-axis starts on the right-hand-side and is the block |
| // axis. The Y-axis is normal but is the inline axis. For the |
| // horizontal/vertical cases, horizontal starts on the right-hand-side and |
| // vertical is normal. |
| scroller.scrollTop = 50; |
| scroller.scrollLeft = 75; |
| |
| assert_equals( |
| blockScrollTimeline.currentTime, scrollerSize - 75, |
| 'Scrolled block timeline'); |
| assert_equals( |
| inlineScrollTimeline.currentTime, 50, 'SCrolled inline timeline'); |
| assert_equals( |
| horizontalScrollTimeline.currentTime, scrollerSize - 75, |
| 'Scrolled horizontal timeline'); |
| assert_equals( |
| verticalScrollTimeline.currentTime, 50, 'Scrolled vertical timeline'); |
| }, 'currentTime handles writing-mode: vertical-rl correctly'); |
| |
| test(function() { |
| const scrollerOverrides = new Map([['writing-mode', 'vertical-lr']]); |
| const scroller = setupScrollTimelineTest(scrollerOverrides); |
| |
| // Set the timeRange such that currentTime maps directly to the value |
| // scrolled. The contents and scroller are square, so it suffices to compute |
| // one edge and use it for all the timelines. |
| const scrollerSize = scroller.scrollHeight - scroller.clientHeight; |
| |
| const blockScrollTimeline = new ScrollTimeline( |
| {scrollSource: scroller, timeRange: scrollerSize, orientation: 'block'}); |
| const inlineScrollTimeline = new ScrollTimeline( |
| {scrollSource: scroller, timeRange: scrollerSize, orientation: 'inline'}); |
| const horizontalScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal' |
| }); |
| const verticalScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'vertical' |
| }); |
| |
| // Unscrolled, all timelines should read a current time of 0. |
| assert_equals( |
| blockScrollTimeline.currentTime, 0, 'Unscrolled block timeline'); |
| assert_equals( |
| inlineScrollTimeline.currentTime, 0, 'Unscrolled inline timeline'); |
| assert_equals( |
| horizontalScrollTimeline.currentTime, 0, |
| 'Unscrolled horizontal timeline'); |
| assert_equals( |
| verticalScrollTimeline.currentTime, 0, 'Unscrolled vertical timeline'); |
| |
| // For vertical-lr, both axes start at their 'normal' positions but the X-axis |
| // is the block direction and the Y-axis is the inline direction. This does |
| // not affect horizontal/vertical. |
| scroller.scrollTop = 50; |
| scroller.scrollLeft = 75; |
| |
| assert_equals(blockScrollTimeline.currentTime, 75, 'Scrolled block timeline'); |
| assert_equals( |
| inlineScrollTimeline.currentTime, 50, 'Scrolled inline timeline'); |
| assert_equals( |
| horizontalScrollTimeline.currentTime, 75, 'Scrolled horizontal timeline'); |
| assert_equals( |
| verticalScrollTimeline.currentTime, 50, 'Scrolled vertical timeline'); |
| }, 'currentTime handles writing-mode: vertical-lr correctly'); |
| |
| test(function() { |
| const scrollerOverrides = new Map([['direction', 'rtl']]); |
| const scroller = setupScrollTimelineTest(scrollerOverrides); |
| // Set the timeRange such that currentTime maps directly to the value |
| // scrolled. The contents and scroller are square, so it suffices to compute |
| // one edge and use it for all the timelines. |
| const scrollerSize = scroller.scrollHeight - scroller.clientHeight; |
| |
| const lengthScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal', |
| startScrollOffset: '20px' |
| }); |
| const percentageScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal', |
| startScrollOffset: '20%' |
| }); |
| const calcScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal', |
| startScrollOffset: 'calc(20% - 5px)' |
| }); |
| |
| // Unscrolled, all timelines should read a current time of unresolved, since |
| // the current offset (0) will be less than the startScrollOffset. |
| assert_equals( |
| lengthScrollTimeline.currentTime, null, |
| 'Unscrolled length-based timeline'); |
| assert_equals( |
| percentageScrollTimeline.currentTime, null, |
| 'Unscrolled percentage-based timeline'); |
| assert_equals( |
| calcScrollTimeline.currentTime, null, 'Unscrolled calc-based timeline'); |
| |
| // With direction rtl offsets are inverted, such that scrollLeft == |
| // scrollerSize is the 'zero' point for currentTime. However the |
| // startScrollOffset is an absolute distance along the offset, so doesn't |
| // need adjusting. |
| |
| // Check the length-based ScrollTimeline. |
| scroller.scrollLeft = scrollerSize; |
| assert_equals( |
| lengthScrollTimeline.currentTime, null, |
| 'Length-based timeline before the startScrollOffset point'); |
| scroller.scrollLeft = scrollerSize - 20; |
| assert_equals( |
| lengthScrollTimeline.currentTime, 0, |
| 'Length-based timeline at the startScrollOffset point'); |
| scroller.scrollLeft = scrollerSize - 50; |
| assert_equals( |
| lengthScrollTimeline.currentTime, |
| calculateCurrentTime(50, 20, scrollerSize, scrollerSize), |
| 'Length-based timeline after the startScrollOffset point'); |
| |
| // Check the percentage-based ScrollTimeline. |
| scroller.scrollLeft = scrollerSize - (0.19 * scrollerSize); |
| assert_equals( |
| percentageScrollTimeline.currentTime, null, |
| 'Percentage-based timeline before the startScrollOffset point'); |
| scroller.scrollLeft = scrollerSize - (0.20 * scrollerSize); |
| assert_equals( |
| percentageScrollTimeline.currentTime, 0, |
| 'Percentage-based timeline at the startScrollOffset point'); |
| scroller.scrollLeft = scrollerSize - (0.4 * scrollerSize); |
| assert_equals( |
| percentageScrollTimeline.currentTime, |
| calculateCurrentTime( |
| 0.4 * scrollerSize, 0.2 * scrollerSize, scrollerSize, scrollerSize), |
| 'Percentage-based timeline after the startScrollOffset point'); |
| |
| // Check the calc-based ScrollTimeline. |
| scroller.scrollLeft = scrollerSize - (0.2 * scrollerSize - 10); |
| assert_equals( |
| calcScrollTimeline.currentTime, null, |
| 'Calc-based timeline before the startScrollOffset point'); |
| scroller.scrollLeft = scrollerSize - (0.2 * scrollerSize - 5); |
| assert_equals( |
| calcScrollTimeline.currentTime, 0, |
| 'Calc-based timeline at the startScrollOffset point'); |
| scroller.scrollLeft = scrollerSize - (0.2 * scrollerSize); |
| assert_equals( |
| calcScrollTimeline.currentTime, |
| calculateCurrentTime( |
| 0.2 * scrollerSize, 0.2 * scrollerSize - 5, scrollerSize, |
| scrollerSize), |
| 'Calc-based timeline after the startScrollOffset point'); |
| }, 'currentTime handles startScrollOffset with direction: rtl correctly'); |
| |
| test(function() { |
| const scrollerOverrides = new Map([['direction', 'rtl']]); |
| const scroller = setupScrollTimelineTest(scrollerOverrides); |
| // Set the timeRange such that currentTime maps directly to the value |
| // scrolled. The contents and scroller are square, so it suffices to compute |
| // one edge and use it for all the timelines. |
| const scrollerSize = scroller.scrollHeight - scroller.clientHeight; |
| |
| const lengthScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal', |
| endScrollOffset: (scrollerSize - 20) + 'px' |
| }); |
| const percentageScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal', |
| endScrollOffset: '80%' |
| }); |
| const calcScrollTimeline = new ScrollTimeline({ |
| scrollSource: scroller, |
| timeRange: scrollerSize, |
| orientation: 'horizontal', |
| endScrollOffset: 'calc(80% + 5px)' |
| }); |
| |
| // With direction rtl offsets are inverted, such that scrollLeft == |
| // scrollerSize is the 'zero' point for currentTime. However the |
| // endScrollOffset is an absolute distance along the offset, so doesn't need |
| // adjusting. |
| |
| // Check the length-based ScrollTimeline. |
| scroller.scrollLeft = 0; |
| assert_equals( |
| lengthScrollTimeline.currentTime, null, |
| 'Length-based timeline after the endScrollOffset point'); |
| scroller.scrollLeft = 20; |
| assert_equals( |
| lengthScrollTimeline.currentTime, |
| calculateCurrentTime( |
| scrollerSize - 20, 0, scrollerSize - 20, scrollerSize), |
| 'Length-based timeline at the endScrollOffset point'); |
| scroller.scrollLeft = 50; |
| assert_equals( |
| lengthScrollTimeline.currentTime, |
| calculateCurrentTime( |
| scrollerSize - 50, 0, scrollerSize - 20, scrollerSize), |
| 'Length-based timeline before the endScrollOffset point'); |
| |
| // Check the percentage-based ScrollTimeline. |
| scroller.scrollLeft = 0.19 * scrollerSize; |
| assert_equals( |
| percentageScrollTimeline.currentTime, null, |
| 'Percentage-based timeline after the endScrollOffset point'); |
| scroller.scrollLeft = 0.20 * scrollerSize; |
| assert_equals( |
| percentageScrollTimeline.currentTime, |
| calculateCurrentTime( |
| 0.8 * scrollerSize, 0, 0.8 * scrollerSize, scrollerSize), |
| 'Percentage-based timeline at the endScrollOffset point'); |
| scroller.scrollLeft = 0.4 * scrollerSize; |
| assert_equals( |
| percentageScrollTimeline.currentTime, |
| calculateCurrentTime( |
| 0.6 * scrollerSize, 0, 0.8 * scrollerSize, scrollerSize), |
| 'Percentage-based timeline before the endScrollOffset point'); |
| |
| // Check the calc-based ScrollTimeline. 80% + 5px |
| scroller.scrollLeft = 0.2 * scrollerSize - 10; |
| assert_equals( |
| calcScrollTimeline.currentTime, null, |
| 'Calc-based timeline after the endScrollOffset point'); |
| scroller.scrollLeft = 0.2 * scrollerSize - 5; |
| assert_equals( |
| calcScrollTimeline.currentTime, |
| calculateCurrentTime( |
| 0.8 * scrollerSize + 5, 0, 0.8 * scrollerSize + 5, scrollerSize), |
| 'Calc-based timeline at the endScrollOffset point'); |
| scroller.scrollLeft = 0.2 * scrollerSize; |
| assert_equals( |
| calcScrollTimeline.currentTime, |
| calculateCurrentTime( |
| 0.8 * scrollerSize, 0, 0.8 * scrollerSize + 5, scrollerSize), |
| 'Calc-based timeline before the endScrollOffset point'); |
| }, 'currentTime handles endScrollOffset with direction: rtl correctly'); |
| </script> |
