kopia lustrzana https://github.com/Tldraw/Tldraw
564 wiersze
15 KiB
TypeScript
564 wiersze
15 KiB
TypeScript
import { react, track, useQuickReactor, useValue } from '@tldraw/state'
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import { TLHandle, TLShapeId } from '@tldraw/tlschema'
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import { dedupe, modulate, objectMapValues } from '@tldraw/utils'
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import classNames from 'classnames'
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import React from 'react'
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import { useCanvasEvents } from '../hooks/useCanvasEvents'
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import { useCoarsePointer } from '../hooks/useCoarsePointer'
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import { useDocumentEvents } from '../hooks/useDocumentEvents'
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import { useEditor } from '../hooks/useEditor'
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import { useEditorComponents } from '../hooks/useEditorComponents'
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import { useFixSafariDoubleTapZoomPencilEvents } from '../hooks/useFixSafariDoubleTapZoomPencilEvents'
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import { useGestureEvents } from '../hooks/useGestureEvents'
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import { useHandleEvents } from '../hooks/useHandleEvents'
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import { useScreenBounds } from '../hooks/useScreenBounds'
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import { Matrix2d } from '../primitives/Matrix2d'
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import { toDomPrecision } from '../primitives/utils'
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import { debugFlags } from '../utils/debug-flags'
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import { GeometryDebuggingView } from './GeometryDebuggingView'
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import { LiveCollaborators } from './LiveCollaborators'
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import { Shape } from './Shape'
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import { ShapeIndicator } from './ShapeIndicator'
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/** @public */
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export function Canvas({ className }: { className?: string }) {
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const editor = useEditor()
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const { Background, SvgDefs } = useEditorComponents()
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const rCanvas = React.useRef<HTMLDivElement>(null)
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const rHtmlLayer = React.useRef<HTMLDivElement>(null)
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const rHtmlLayer2 = React.useRef<HTMLDivElement>(null)
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useScreenBounds()
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useDocumentEvents()
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useCoarsePointer()
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useGestureEvents(rCanvas)
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useFixSafariDoubleTapZoomPencilEvents(rCanvas)
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useQuickReactor(
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'position layers',
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() => {
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const htmlElm = rHtmlLayer.current
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if (!htmlElm) return
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const htmlElm2 = rHtmlLayer2.current
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if (!htmlElm2) return
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const { x, y, z } = editor.getCamera()
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// Because the html container has a width/height of 1px, we
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// need to create a small offset when zoomed to ensure that
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// the html container and svg container are lined up exactly.
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const offset =
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z >= 1 ? modulate(z, [1, 8], [0.125, 0.5], true) : modulate(z, [0.1, 1], [-2, 0.125], true)
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const transform = `scale(${toDomPrecision(z)}) translate(${toDomPrecision(
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x + offset
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)}px,${toDomPrecision(y + offset)}px)`
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htmlElm.style.setProperty('transform', transform)
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htmlElm2.style.setProperty('transform', transform)
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},
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[editor]
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)
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const events = useCanvasEvents()
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const shapeSvgDefs = useValue(
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'shapeSvgDefs',
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() => {
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const shapeSvgDefsByKey = new Map<string, JSX.Element>()
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for (const util of objectMapValues(editor.shapeUtils)) {
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if (!util) return
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const defs = util.getCanvasSvgDefs()
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for (const { key, component: Component } of defs) {
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if (shapeSvgDefsByKey.has(key)) continue
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shapeSvgDefsByKey.set(key, <Component key={key} />)
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}
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}
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return [...shapeSvgDefsByKey.values()]
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},
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[editor]
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)
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const hideShapes = useValue('debug_shapes', () => debugFlags.hideShapes.get(), [debugFlags])
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const debugSvg = useValue('debug_svg', () => debugFlags.debugSvg.get(), [debugFlags])
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const debugGeometry = useValue('debug_geometry', () => debugFlags.debugGeometry.get(), [
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debugFlags,
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])
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return (
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<div
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ref={rCanvas}
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draggable={false}
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className={classNames('tl-canvas', className)}
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data-testid="canvas"
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{...events}
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>
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{Background && <Background />}
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<GridWrapper />
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<UiLogger />
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<svg className="tl-svg-context">
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<defs>
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{shapeSvgDefs}
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{Cursor && <Cursor />}
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<CollaboratorHint />
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<ArrowheadDot />
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<ArrowheadCross />
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{SvgDefs && <SvgDefs />}
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</defs>
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</svg>
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<div ref={rHtmlLayer} className="tl-html-layer tl-shapes" draggable={false}>
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<OnTheCanvasWrapper />
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<SelectionBackgroundWrapper />
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{hideShapes ? null : debugSvg ? <ShapesWithSVGs /> : <ShapesToDisplay />}
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</div>
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<div className="tl-fixed-layer tl-overlays">
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<div ref={rHtmlLayer2} className="tl-html-layer">
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{debugGeometry ? <GeometryDebuggingView /> : null}
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<HandlesWrapper />
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<BrushWrapper />
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<ScribbleWrapper />
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<ZoomBrushWrapper />
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<SelectedIdIndicators />
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<HoveredShapeIndicator />
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<HintedShapeIndicator />
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<SnapLinesWrapper />
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<SelectionForegroundWrapper />
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<LiveCollaborators />
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</div>
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<InFrontOfTheCanvasWrapper />
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</div>
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</div>
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)
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}
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function GridWrapper() {
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const editor = useEditor()
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const gridSize = useValue('gridSize', () => editor.getDocumentSettings().gridSize, [editor])
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const { x, y, z } = useValue('camera', () => editor.getCamera(), [editor])
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const isGridMode = useValue('isGridMode', () => editor.getInstanceState().isGridMode, [editor])
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const { Grid } = useEditorComponents()
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if (!(Grid && isGridMode)) return null
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return <Grid x={x} y={y} z={z} size={gridSize} />
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}
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function ScribbleWrapper() {
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const editor = useEditor()
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const scribbles = useValue('scribbles', () => editor.getInstanceState().scribbles, [editor])
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const zoomLevel = useValue('zoomLevel', () => editor.getZoomLevel(), [editor])
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const { Scribble } = useEditorComponents()
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if (!(Scribble && scribbles.length)) return null
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return (
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<>
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{scribbles.map((scribble) => (
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<Scribble
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key={scribble.id}
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className="tl-user-scribble"
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scribble={scribble}
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zoom={zoomLevel}
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/>
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))}
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</>
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)
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}
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function BrushWrapper() {
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const editor = useEditor()
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const brush = useValue('brush', () => editor.getInstanceState().brush, [editor])
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const { Brush } = useEditorComponents()
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if (!(Brush && brush)) return null
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return <Brush className="tl-user-brush" brush={brush} />
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}
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function ZoomBrushWrapper() {
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const editor = useEditor()
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const zoomBrush = useValue('zoomBrush', () => editor.getInstanceState().zoomBrush, [editor])
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const { ZoomBrush } = useEditorComponents()
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if (!(ZoomBrush && zoomBrush)) return null
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return <ZoomBrush className="tl-user-brush tl-zoom-brush" brush={zoomBrush} />
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}
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function SnapLinesWrapper() {
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const editor = useEditor()
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const lines = useValue('snapLines', () => editor.snaps.getLines(), [editor])
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const zoomLevel = useValue('zoomLevel', () => editor.getZoomLevel(), [editor])
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const { SnapLine } = useEditorComponents()
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if (!(SnapLine && lines.length > 0)) return null
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return (
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<>
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{lines.map((line) => (
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<SnapLine key={line.id} className="tl-user-snapline" line={line} zoom={zoomLevel} />
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))}
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</>
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)
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}
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const MIN_HANDLE_DISTANCE = 48
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function HandlesWrapper() {
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const editor = useEditor()
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const { Handles } = useEditorComponents()
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const zoomLevel = useValue('zoomLevel', () => editor.getZoomLevel(), [editor])
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const isCoarse = useValue('coarse pointer', () => editor.getInstanceState().isCoarsePointer, [
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editor,
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])
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const onlySelectedShape = useValue('onlySelectedShape', () => editor.getOnlySelectedShape(), [
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editor,
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])
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const isChangingStyle = useValue(
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'isChangingStyle',
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() => editor.getInstanceState().isChangingStyle,
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[editor]
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)
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const isReadonly = useValue('isChangingStyle', () => editor.getInstanceState().isReadonly, [
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editor,
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])
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const handles = useValue(
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'handles',
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() => {
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const onlySelectedShape = editor.getOnlySelectedShape()
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if (onlySelectedShape) {
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return editor.getShapeHandles(onlySelectedShape)
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}
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return undefined
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},
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[editor]
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)
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const transform = useValue(
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'transform',
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() => {
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const onlySelectedShape = editor.getOnlySelectedShape()
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if (onlySelectedShape) {
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return editor.getShapePageTransform(onlySelectedShape)
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}
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return undefined
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},
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[editor]
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)
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if (!Handles || !onlySelectedShape || isChangingStyle || isReadonly) return null
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if (!handles) return null
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if (!transform) return null
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// Don't display a temporary handle if the distance between it and its neighbors is too small.
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const handlesToDisplay: TLHandle[] = []
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for (let i = 0, handle = handles[i]; i < handles.length; i++, handle = handles[i]) {
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if (handle.type !== 'vertex') {
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const prev = handles[i - 1]
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const next = handles[i + 1]
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if (prev && next) {
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if (Math.hypot(prev.y - next.y, prev.x - next.x) < MIN_HANDLE_DISTANCE / zoomLevel) {
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continue
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}
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}
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}
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handlesToDisplay.push(handle)
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}
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handlesToDisplay.sort((a) => (a.type === 'vertex' ? 1 : -1))
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return (
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<Handles>
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<g transform={Matrix2d.toCssString(transform)}>
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{handlesToDisplay.map((handle) => {
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return (
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<HandleWrapper
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key={handle.id}
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shapeId={onlySelectedShape.id}
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handle={handle}
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zoom={zoomLevel}
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isCoarse={isCoarse}
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/>
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)
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})}
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</g>
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</Handles>
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)
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}
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function HandleWrapper({
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shapeId,
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handle,
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zoom,
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isCoarse,
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}: {
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shapeId: TLShapeId
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handle: TLHandle
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zoom: number
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isCoarse: boolean
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}) {
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const events = useHandleEvents(shapeId, handle.id)
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const { Handle } = useEditorComponents()
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if (!Handle) return null
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return (
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<g aria-label="handle" transform={`translate(${handle.x}, ${handle.y})`} {...events}>
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<Handle shapeId={shapeId} handle={handle} zoom={zoom} isCoarse={isCoarse} />
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</g>
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)
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}
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function ShapesWithSVGs() {
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const editor = useEditor()
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const renderingShapes = useValue('rendering shapes', () => editor.getRenderingShapes(), [editor])
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return (
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<>
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{renderingShapes.map((result) => (
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<React.Fragment key={result.id + '_fragment'}>
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<Shape {...result} />
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<DebugSvgCopy id={result.id} />
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</React.Fragment>
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))}
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</>
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)
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}
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function ShapesToDisplay() {
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const editor = useEditor()
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const renderingShapes = useValue('rendering shapes', () => editor.getRenderingShapes(), [editor])
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return (
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<>
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{renderingShapes.map((result) => (
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<Shape key={result.id + '_shape'} {...result} />
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))}
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</>
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)
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}
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function SelectedIdIndicators() {
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const editor = useEditor()
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const selectedShapeIds = useValue(
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'selectedShapeIds',
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() => editor.getCurrentPageState().selectedShapeIds,
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[editor]
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)
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const shouldDisplay = useValue(
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'should display selected ids',
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() => {
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// todo: move to tldraw selected ids wrapper
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return (
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editor.isInAny(
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'select.idle',
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'select.brushing',
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'select.scribble_brushing',
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'select.editing_shape',
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'select.pointing_shape',
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'select.pointing_selection',
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'select.pointing_handle'
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) && !editor.getInstanceState().isChangingStyle
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)
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},
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[editor]
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)
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if (!shouldDisplay) return null
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return (
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<>
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{selectedShapeIds.map((id) => (
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<ShapeIndicator key={id + '_indicator'} className="tl-user-indicator__selected" id={id} />
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))}
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</>
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)
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}
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const HoveredShapeIndicator = function HoveredShapeIndicator() {
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const editor = useEditor()
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const { HoveredShapeIndicator } = useEditorComponents()
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const isCoarsePointer = useValue(
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'coarse pointer',
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() => editor.getInstanceState().isCoarsePointer,
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[editor]
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)
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const isHoveringCanvas = useValue(
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'hovering canvas',
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() => editor.getInstanceState().isHoveringCanvas,
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[editor]
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)
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const hoveredShapeId = useValue('hovered id', () => editor.getCurrentPageState().hoveredShapeId, [
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editor,
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])
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if (isCoarsePointer || !isHoveringCanvas || !hoveredShapeId || !HoveredShapeIndicator) return null
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return <HoveredShapeIndicator shapeId={hoveredShapeId} />
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}
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const HintedShapeIndicator = track(function HintedShapeIndicator() {
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const editor = useEditor()
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const ids = dedupe(editor.getHintingShapeIds())
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if (!ids.length) return null
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return (
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<>
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{ids.map((id) => (
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<ShapeIndicator className="tl-user-indicator__hint" id={id} key={id + '_hinting'} />
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))}
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</>
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)
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})
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function Cursor() {
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return (
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<g id="cursor">
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<g fill="rgba(0,0,0,.2)" transform="translate(-11,-11)">
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<path d="m12 24.4219v-16.015l11.591 11.619h-6.781l-.411.124z" />
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<path d="m21.0845 25.0962-3.605 1.535-4.682-11.089 3.686-1.553z" />
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</g>
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<g fill="white" transform="translate(-12,-12)">
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<path d="m12 24.4219v-16.015l11.591 11.619h-6.781l-.411.124z" />
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<path d="m21.0845 25.0962-3.605 1.535-4.682-11.089 3.686-1.553z" />
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</g>
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<g fill="currentColor" transform="translate(-12,-12)">
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<path d="m19.751 24.4155-1.844.774-3.1-7.374 1.841-.775z" />
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<path d="m13 10.814v11.188l2.969-2.866.428-.139h4.768z" />
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</g>
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</g>
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)
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}
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function CollaboratorHint() {
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return <path id="cursor_hint" fill="currentColor" d="M -2,-5 2,0 -2,5 Z" />
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}
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function ArrowheadDot() {
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return (
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<marker id="arrowhead-dot" className="tl-arrow-hint" refX="3.0" refY="3.0" orient="0">
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<circle cx="3" cy="3" r="2" strokeDasharray="100%" />
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</marker>
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)
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}
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function ArrowheadCross() {
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return (
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<marker id="arrowhead-cross" className="tl-arrow-hint" refX="3.0" refY="3.0" orient="auto">
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<line x1="1.5" y1="1.5" x2="4.5" y2="4.5" strokeDasharray="100%" />
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<line x1="1.5" y1="4.5" x2="4.5" y2="1.5" strokeDasharray="100%" />
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</marker>
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)
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}
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const DebugSvgCopy = track(function DupSvg({ id }: { id: TLShapeId }) {
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const editor = useEditor()
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const shape = editor.getShape(id)
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const [html, setHtml] = React.useState('')
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const isInRoot = shape?.parentId === editor.getCurrentPageId()
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React.useEffect(() => {
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if (!isInRoot) return
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let latest = null
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const unsubscribe = react('shape to svg', async () => {
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const renderId = Math.random()
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latest = renderId
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const bb = editor.getShapePageBounds(id)
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const el = await editor.getSvg([id], { padding: 0 })
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if (el && bb && latest === renderId) {
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el.style.setProperty('overflow', 'visible')
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el.setAttribute('preserveAspectRatio', 'xMidYMin slice')
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el.style.setProperty('transform', `translate(${bb.x}px, ${bb.y + bb.h + 12}px)`)
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el.style.setProperty('border', '1px solid black')
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setHtml(el?.outerHTML)
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}
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})
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return () => {
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latest = null
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unsubscribe()
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}
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}, [editor, id, isInRoot])
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if (!isInRoot) return null
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return (
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<div style={{ paddingTop: 12, position: 'absolute' }}>
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<div style={{ display: 'flex' }} dangerouslySetInnerHTML={{ __html: html }} />
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</div>
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)
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})
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function UiLogger() {
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const uiLog = useValue('debugging ui log', () => debugFlags.logMessages.get(), [debugFlags])
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if (!uiLog.length) return null
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return (
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<div className="debug__ui-logger">
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{uiLog.map((message, messageIndex) => {
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const text = typeof message === 'string' ? message : JSON.stringify(message)
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return (
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<div className="debug__ui-logger__line" key={messageIndex}>
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{text}
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</div>
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)
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})}
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</div>
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)
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}
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export function SelectionForegroundWrapper() {
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const editor = useEditor()
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const selectionRotation = useValue('selection rotation', () => editor.getSelectionRotation(), [
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editor,
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])
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|
const selectionBounds = useValue(
|
|
'selection bounds',
|
|
() => editor.getSelectionRotatedPageBounds(),
|
|
[editor]
|
|
)
|
|
const { SelectionForeground } = useEditorComponents()
|
|
if (!selectionBounds || !SelectionForeground) return null
|
|
return <SelectionForeground bounds={selectionBounds} rotation={selectionRotation} />
|
|
}
|
|
|
|
export function SelectionBackgroundWrapper() {
|
|
const editor = useEditor()
|
|
const selectionRotation = useValue('selection rotation', () => editor.getSelectionRotation(), [
|
|
editor,
|
|
])
|
|
const selectionBounds = useValue(
|
|
'selection bounds',
|
|
() => editor.getSelectionRotatedPageBounds(),
|
|
[editor]
|
|
)
|
|
const { SelectionBackground } = useEditorComponents()
|
|
if (!selectionBounds || !SelectionBackground) return null
|
|
return <SelectionBackground bounds={selectionBounds} rotation={selectionRotation} />
|
|
}
|
|
|
|
export function OnTheCanvasWrapper() {
|
|
const { OnTheCanvas } = useEditorComponents()
|
|
if (!OnTheCanvas) return null
|
|
return <OnTheCanvas />
|
|
}
|
|
|
|
export function InFrontOfTheCanvasWrapper() {
|
|
const { InFrontOfTheCanvas } = useEditorComponents()
|
|
if (!InFrontOfTheCanvas) return null
|
|
return <InFrontOfTheCanvas />
|
|
}
|