Make it possible to move the playhead to an exact position (#92)

theatre/studio/src/panels/SequenceEditorPanel/RightOverlay/Playhead.tsx

@@ -16,6 +16,9 @@ import {
   useLockFrameStampPosition,
 } from '@theatre/studio/panels/SequenceEditorPanel/FrameStampPositionProvider'
 import {pointerEventsAutoInNormalMode} from '@theatre/studio/css'
+import usePopover from '@theatre/studio/uiComponents/Popover/usePopover'
+import BasicPopover from '@theatre/studio/uiComponents/Popover/BasicPopover'
+import PlayheadPositionPopover from './PlayheadPositionPopover'
 
 const Container = styled.div<{isVisible: boolean}>`
   --thumbColor: #00e0ff;
@@ -150,6 +153,20 @@ const Playhead: React.FC<{layoutP: Pointer<SequenceEditorPanelLayout>}> = ({
 }) => {
   const [thumbRef, thumbNode] = useRefAndState<HTMLElement | null>(null)
 
+  const [popoverNode, openPopover, closePopover, isPopoverOpen] = usePopover(
+    {},
+    () => {
+      return (
+        <BasicPopover>
+          <PlayheadPositionPopover
+            layoutP={layoutP}
+            onRequestClose={closePopover}
+          />
+        </BasicPopover>
+      )
+    },
+  )
+
   const gestureHandlers = useMemo((): Parameters<typeof useDrag>[1] => {
     const setIsSeeking = val(layoutP.seeker.setIsSeeking)
 
@@ -215,6 +232,8 @@ const Playhead: React.FC<{layoutP: Pointer<SequenceEditorPanelLayout>}> = ({
       posInClippedSpace <= val(layoutP.clippedSpace.width)
 
     return (
+      <>
+        {popoverNode}
         <Container
           isVisible={isVisible}
           style={{transform: `translate3d(${posInClippedSpace}px, 0, 0)`}}
@@ -224,6 +243,9 @@ const Playhead: React.FC<{layoutP: Pointer<SequenceEditorPanelLayout>}> = ({
           <Thumb
             ref={thumbRef as $IntentionalAny}
             data-pos={posInUnitSpace.toFixed(3)}
+            onClick={(e) => {
+              openPopover(e, thumbNode!)
+            }}
           >
             <RoomToClick room={8} />
             <Squinch />
@@ -239,8 +261,9 @@ const Playhead: React.FC<{layoutP: Pointer<SequenceEditorPanelLayout>}> = ({
             className={isSeeking ? 'seeking' : ''}
           />
         </Container>
+      </>
     )
-  }, [layoutP])
+  }, [layoutP, thumbRef, popoverNode])
 }
 
 export default Playhead

theatre/studio/src/panels/SequenceEditorPanel/RightOverlay/PlayheadPositionPopover.tsx

@@ -0,0 +1,91 @@
+import styled from 'styled-components'
+import type {SequenceEditorPanelLayout} from '@theatre/studio/panels/SequenceEditorPanel/layout/layout'
+import {usePrism} from '@theatre/react'
+import type {BasicNumberInputNudgeFn} from '@theatre/studio/uiComponents/form/BasicNumberInput'
+import BasicNumberInput from '@theatre/studio/uiComponents/form/BasicNumberInput'
+import {propNameText} from '@theatre/studio/panels/DetailPanel/propEditors/utils/SingleRowPropEditor'
+import {useLayoutEffect, useMemo, useRef} from 'react'
+import React from 'react'
+import {val} from '@theatre/dataverse'
+import type {Pointer} from '@theatre/dataverse'
+import clamp from 'lodash-es/clamp'
+
+const greaterThanZero = (v: number) => isFinite(v) && v > 0
+
+const Container = styled.div`
+  display: flex;
+  gap: 8px;
+  padding: 4px 8px;
+  height: 28px;
+  align-items: center;
+`
+
+const Label = styled.div`
+  ${propNameText};
+  white-space: nowrap;
+`
+
+const nudge: BasicNumberInputNudgeFn = ({deltaX}) => deltaX * 0.25
+
+const PlayheadPositionPopover: React.FC<{
+  layoutP: Pointer<SequenceEditorPanelLayout>
+  /**
+   * Called when user hits enter/escape
+   */
+  onRequestClose: () => void
+}> = ({layoutP, onRequestClose}) => {
+  const sheet = val(layoutP.sheet)
+  const sequence = sheet.getSequence()
+
+  const fns = useMemo(() => {
+    let tempPosition: number | undefined
+    const originalPosition = sequence.position
+
+    return {
+      temporarilySetValue(newPosition: number): void {
+        if (tempPosition) {
+          tempPosition = undefined
+        }
+        tempPosition = clamp(newPosition, 0, sequence.length)
+        sequence.position = tempPosition
+      },
+      discardTemporaryValue(): void {
+        if (tempPosition) {
+          tempPosition = undefined
+          sequence.position = originalPosition
+        }
+      },
+      permenantlySetValue(newPosition: number): void {
+        if (tempPosition) {
+          tempPosition = undefined
+        }
+        sequence.position = clamp(newPosition, 0, sequence.length)
+      },
+    }
+  }, [layoutP, sequence])
+
+  const inputRef = useRef<HTMLInputElement>(null)
+  useLayoutEffect(() => {
+    inputRef.current!.focus()
+  }, [])
+
+  return usePrism(() => {
+    const sequence = sheet.getSequence()
+
+    return (
+      <Container>
+        <Label>Playhead position</Label>
+        <BasicNumberInput
+          value={sequence.position}
+          {...fns}
+          isValid={greaterThanZero}
+          inputRef={inputRef}
+          onBlur={onRequestClose}
+          nudge={nudge}
+        />
+      </Container>
+    )
+  }, [sheet, fns, inputRef])
+}
+
+export default PlayheadPositionPopover