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init: the first public commit for AFFiNE
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DarkSky
310
libs/components/board-sessions/src/transform-single-session.ts
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310
libs/components/board-sessions/src/transform-single-session.ts
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import {
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TLBoundsCorner,
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TLSnapLine,
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TLBoundsEdge,
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Utils,
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TLBoundsWithCenter,
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TLBounds,
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} from '@tldraw/core';
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import { Vec } from '@tldraw/vec';
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import {
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SessionType,
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TldrawCommand,
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TldrawPatch,
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TDShape,
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TDStatus,
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SLOW_SPEED,
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SNAP_DISTANCE,
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} from '@toeverything/components/board-types';
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import { TLDR } from '@toeverything/components/board-state';
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import { BaseSession } from './base-session';
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import type { TldrawApp } from '@toeverything/components/board-state';
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type SnapInfo =
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| {
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state: 'empty';
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}
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| {
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state: 'ready';
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bounds: TLBoundsWithCenter[];
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};
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export class TransformSingleSession extends BaseSession {
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type = SessionType.TransformSingle;
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status = TDStatus.Transforming;
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performanceMode: undefined;
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transformType: TLBoundsEdge | TLBoundsCorner;
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scaleX = 1;
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scaleY = 1;
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isCreate: boolean;
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initialShape: TDShape;
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initialShapeBounds: TLBounds;
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initialCommonBounds: TLBounds;
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snapInfo: SnapInfo = { state: 'empty' };
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prevPoint = [0, 0];
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speed = 1;
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constructor(
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app: TldrawApp,
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id: string,
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transformType: TLBoundsEdge | TLBoundsCorner,
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isCreate = false
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) {
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super(app);
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this.isCreate = isCreate;
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this.transformType = transformType;
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const shape = this.app.getShape(id);
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this.initialShape = shape;
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this.initialShapeBounds = TLDR.get_bounds(shape);
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this.initialCommonBounds = TLDR.get_rotated_bounds(shape);
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this.app.rotationInfo.selectedIds = [shape.id];
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}
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start = (): TldrawPatch | undefined => {
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this.snapInfo = {
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state: 'ready',
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bounds: this.app.shapes
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.filter(shape => shape.id !== this.initialShape.id)
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.map(shape =>
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Utils.getBoundsWithCenter(TLDR.get_rotated_bounds(shape))
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),
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};
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return void null;
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};
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update = (): TldrawPatch | undefined => {
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const {
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transformType,
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initialShape,
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initialShapeBounds,
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app: {
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settings: { isSnapping, showGrid },
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currentPageId,
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pageState: { camera },
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viewport,
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currentPoint,
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previousPoint,
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originPoint,
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currentGrid,
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shiftKey,
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altKey,
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metaKey,
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},
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} = this;
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if (initialShape.isLocked) return void null;
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const shapes = {} as Record<string, Partial<TDShape>>;
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const delta = altKey
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? Vec.mul(Vec.sub(currentPoint, originPoint), 2)
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: Vec.sub(currentPoint, originPoint);
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const shape = this.app.getShape(initialShape.id);
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const utils = TLDR.get_shape_util(shape);
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let newBounds = Utils.getTransformedBoundingBox(
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initialShapeBounds,
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transformType,
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delta,
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shape.rotation,
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shiftKey || shape.isAspectRatioLocked || utils.isAspectRatioLocked
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);
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if (altKey) {
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newBounds = {
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...newBounds,
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...Utils.centerBounds(
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newBounds,
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Utils.getBoundsCenter(initialShapeBounds)
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),
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};
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}
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if (showGrid) {
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newBounds = {
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...newBounds,
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...Utils.snapBoundsToGrid(newBounds, currentGrid),
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};
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}
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// Should we snap?
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const speed = Vec.dist(currentPoint, previousPoint);
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const speedChange = speed - this.speed;
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this.speed = this.speed + speedChange * (speedChange > 1 ? 0.5 : 0.15);
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let snapLines: TLSnapLine[] = [];
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if (
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((isSnapping && !metaKey) || (!isSnapping && metaKey)) &&
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!initialShape.rotation && // not now anyway
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this.speed * camera.zoom < SLOW_SPEED &&
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this.snapInfo.state === 'ready'
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) {
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const snapResult = Utils.getSnapPoints(
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Utils.getBoundsWithCenter(newBounds),
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this.snapInfo.bounds.filter(
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bounds =>
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Utils.boundsContain(viewport, bounds) ||
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Utils.boundsCollide(viewport, bounds)
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),
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SNAP_DISTANCE / camera.zoom
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);
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if (snapResult) {
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snapLines = snapResult.snapLines;
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newBounds = Utils.getTransformedBoundingBox(
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initialShapeBounds,
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transformType,
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Vec.sub(delta, snapResult.offset),
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shape.rotation,
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shiftKey ||
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shape.isAspectRatioLocked ||
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utils.isAspectRatioLocked
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);
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}
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}
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const afterShape = TLDR.get_shape_util(shape).transformSingle(
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shape,
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newBounds,
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{
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initialShape,
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type: this.transformType,
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scaleX: newBounds.scaleX,
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scaleY: newBounds.scaleY,
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transformOrigin: [0.5, 0.5],
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}
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);
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if (afterShape) {
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shapes[shape.id] = afterShape;
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}
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if (showGrid && afterShape && afterShape.point) {
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afterShape.point = Vec.snap(afterShape.point, currentGrid);
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}
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return {
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appState: {
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snapLines,
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},
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document: {
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pages: {
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[currentPageId]: {
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shapes,
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},
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},
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},
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};
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};
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cancel = (): TldrawPatch | undefined => {
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const {
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initialShape,
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app: { currentPageId },
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} = this;
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const shapes = {} as Record<string, TDShape | undefined>;
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if (this.isCreate) {
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shapes[initialShape.id] = undefined;
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} else {
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shapes[initialShape.id] = initialShape;
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}
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return {
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appState: {
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snapLines: [],
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},
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document: {
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pages: {
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[currentPageId]: {
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shapes,
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},
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},
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pageStates: {
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[currentPageId]: {
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selectedIds: this.isCreate ? [] : [initialShape.id],
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},
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},
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},
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};
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};
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complete = (): TldrawPatch | TldrawCommand | undefined => {
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const {
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initialShape,
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app: { currentPageId },
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} = this;
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if (initialShape.isLocked) return;
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if (
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this.isCreate &&
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Vec.dist(this.app.originPoint, this.app.currentPoint) < 2
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) {
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return this.cancel();
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}
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const beforeShapes = {} as Record<string, Partial<TDShape> | undefined>;
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const afterShapes = {} as Record<string, Partial<TDShape>>;
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beforeShapes[initialShape.id] = this.isCreate
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? undefined
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: initialShape;
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afterShapes[initialShape.id] = TLDR.on_session_complete(
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this.app.getShape(initialShape.id)
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);
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return {
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id: 'transform_single',
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before: {
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appState: {
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snapLines: [],
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},
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document: {
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pages: {
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[currentPageId]: {
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shapes: beforeShapes,
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},
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},
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pageStates: {
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[currentPageId]: {
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selectedIds: this.isCreate ? [] : [initialShape.id],
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editingId: undefined,
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hoveredId: undefined,
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},
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},
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},
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},
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after: {
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appState: {
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snapLines: [],
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},
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document: {
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pages: {
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[currentPageId]: {
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shapes: afterShapes,
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},
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},
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pageStates: {
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[currentPageId]: {
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selectedIds: [initialShape.id],
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editingId: undefined,
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hoveredId: undefined,
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},
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},
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},
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},
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};
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};
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}
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