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137 changes: 137 additions & 0 deletions
137
packages/erd-editor/src/components/erd/minimap/useMinimapScroll.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| import { observable } from '@dineug/r-html'; | ||
|
|
||
| import { useAppContext } from '@/components/context'; | ||
| import { MINIMAP_SIZE } from '@/constants/layout'; | ||
| import { streamScrollToAction } from '@/engine/modules/settings/atom.actions'; | ||
| import { Ctx, ValuesType } from '@/internal-types'; | ||
| import { isMouseEvent } from '@/utils/domEvent'; | ||
| import { drag$, DragMove } from '@/utils/globalEventObservable'; | ||
|
|
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| const Direction = { | ||
| left: 'left', | ||
| right: 'right', | ||
| top: 'top', | ||
| bottom: 'bottom', | ||
| } as const; | ||
| type Direction = ValuesType<typeof Direction>; | ||
|
|
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| export function useMinimapScroll(ctx: Ctx) { | ||
| const app = useAppContext(ctx); | ||
| const state = observable({ | ||
| selected: false, | ||
| }); | ||
|
|
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| let clientX = 0; | ||
| let clientY = 0; | ||
|
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| const getRatio = () => { | ||
| const { store } = app.value; | ||
| const { | ||
| settings: { width }, | ||
| } = store.state; | ||
| return MINIMAP_SIZE / width; | ||
| }; | ||
|
|
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| const absoluteMovement = (movement: number) => { | ||
| const ratio = getRatio(); | ||
| return -1 * (movement / ratio); | ||
| }; | ||
|
|
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| const getMovementX = ({ movementX, x }: DragMove) => { | ||
| const { store } = app.value; | ||
| const { | ||
| settings, | ||
| editor: { viewport }, | ||
| } = store.state; | ||
| const scrollLeft = settings.scrollLeft + absoluteMovement(movementX); | ||
| const min = viewport.width - settings.width; | ||
| const max = 0; | ||
| const direction: Direction = movementX < 0 ? 'left' : 'right'; | ||
| let change = false; | ||
|
|
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| switch (direction) { | ||
| case 'left': | ||
| if (scrollLeft < max && x < clientX) { | ||
| clientX += movementX; | ||
| change = true; | ||
| } | ||
| break; | ||
| case 'right': | ||
| if (scrollLeft > min && x > clientX) { | ||
| clientX += movementX; | ||
| change = true; | ||
| } | ||
| break; | ||
| } | ||
|
|
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| return change ? movementX : 0; | ||
| }; | ||
|
|
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| const getMovementY = ({ movementY, y }: DragMove) => { | ||
| const { store } = app.value; | ||
| const { | ||
| settings, | ||
| editor: { viewport }, | ||
| } = store.state; | ||
| const scrollTop = settings.scrollTop + absoluteMovement(movementY); | ||
| const min = viewport.height - settings.height; | ||
| const max = 0; | ||
| const direction: Direction = movementY < 0 ? 'top' : 'bottom'; | ||
| let change = false; | ||
|
|
||
| switch (direction) { | ||
| case 'top': | ||
| if (scrollTop < max && y < clientY) { | ||
| clientY += movementY; | ||
| change = true; | ||
| } | ||
| break; | ||
| case 'bottom': | ||
| if (scrollTop > min && y > clientY) { | ||
| clientY += movementY; | ||
| change = true; | ||
| } | ||
| break; | ||
| } | ||
|
|
||
| return change ? movementY : 0; | ||
| }; | ||
|
|
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| const handleScroll = (dragMove: DragMove) => { | ||
| const { event } = dragMove; | ||
| event.type === 'mousemove' && event.preventDefault(); | ||
| const movementX = getMovementX(dragMove); | ||
| const movementY = getMovementY(dragMove); | ||
|
|
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| if (movementX === 0 && movementY === 0) { | ||
| return; | ||
| } | ||
|
|
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| const { store } = app.value; | ||
| store.dispatch( | ||
| streamScrollToAction({ | ||
| movementX: absoluteMovement(movementX), | ||
| movementY: absoluteMovement(movementY), | ||
| }) | ||
| ); | ||
| }; | ||
|
|
||
| const onScrollStart = (event: MouseEvent | TouchEvent) => { | ||
| state.selected = true; | ||
|
|
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| clientX = isMouseEvent(event) ? event.clientX : event.touches[0].clientX; | ||
| clientY = isMouseEvent(event) ? event.clientY : event.touches[0].clientY; | ||
|
|
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| drag$.subscribe({ | ||
| next: handleScroll, | ||
| complete: () => { | ||
| state.selected = false; | ||
| }, | ||
| }); | ||
| }; | ||
|
|
||
| return { | ||
| state, | ||
| onScrollStart, | ||
| }; | ||
| } |
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