540 lines
14 KiB
TypeScript
540 lines
14 KiB
TypeScript
import { clamp, deepClone, getCommonBounds } from 'utils'
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import { getShapeUtils } from 'state/shape-utils'
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import vec from './vec'
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import {
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Data,
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Bounds,
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Shape,
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GroupShape,
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ShapeType,
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CodeFile,
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Page,
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PageState,
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ShapeUtility,
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ParentShape,
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} from 'types'
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import { AssertionError } from 'assert'
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export default class StateUtils {
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static getCameraZoom(zoom: number): number {
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return clamp(zoom, 0.1, 5)
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}
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static screenToWorld(point: number[], data: Data): number[] {
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const camera = this.getCurrentCamera(data)
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return vec.sub(vec.div(point, camera.zoom), camera.point)
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}
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static getViewport(data: Data): Bounds {
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const [minX, minY] = this.screenToWorld([0, 0], data)
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const [maxX, maxY] = this.screenToWorld(
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[window.innerWidth, window.innerHeight],
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data
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)
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return {
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minX,
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minY,
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maxX,
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maxY,
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height: maxX - minX,
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width: maxY - minY,
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}
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}
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static getCurrentCamera(data: Data): {
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point: number[]
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zoom: number
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} {
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return data.pageStates[data.currentPageId].camera
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}
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/**
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* Get a shape from the project.
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* @param data
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* @param shapeId
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*/
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static getShape(data: Data, shapeId: string): Shape {
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return data.document.pages[data.currentPageId].shapes[shapeId]
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}
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/**
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* Get the current page.
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* @param data
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*/
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static getPage(data: Data): Page {
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return data.document.pages[data.currentPageId]
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}
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/**
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* Get the current page's page state.
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* @param data
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*/
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static getPageState(data: Data): PageState {
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return data.pageStates[data.currentPageId]
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}
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/**
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* Get the current page's code file.
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* @param data
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* @param fileId
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*/
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static getCurrentCode(data: Data, fileId: string): CodeFile {
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return data.document.code[fileId]
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}
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/**
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* Get the current page's shapes as an array.
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* @param data
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*/
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static getShapes(data: Data): Shape[] {
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const page = this.getPage(data)
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return Object.values(page.shapes)
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}
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/**
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* Get the current selected shapes as an array.
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* @param data
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*/
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static getSelectedShapes(data: Data): Shape[] {
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const page = this.getPage(data)
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const ids = this.getSelectedIds(data)
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return ids.map((id) => page.shapes[id])
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}
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/**
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* Get a shape's parent.
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* @param data
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* @param id
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*/
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static getParent(data: Data, id: string): Shape | Page {
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const page = this.getPage(data)
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const shape = page.shapes[id]
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return page.shapes[shape.parentId] || data.document.pages[shape.parentId]
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}
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/**
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* Get a shape's children.
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* @param data
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* @param id
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*/
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static getChildren(data: Data, id: string): Shape[] {
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const page = this.getPage(data)
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return Object.values(page.shapes)
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.filter(({ parentId }) => parentId === id)
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.sort((a, b) => a.childIndex - b.childIndex)
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}
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/**
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* Get a shape's siblings.
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* @param data
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* @param id
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*/
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static getSiblings(data: Data, id: string): Shape[] {
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const page = this.getPage(data)
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const shape = page.shapes[id]
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return Object.values(page.shapes)
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.filter(({ parentId }) => parentId === shape.parentId)
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.sort((a, b) => a.childIndex - b.childIndex)
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}
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/**
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* Get the next child index above a shape.
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* TODO: Make work for grouped shapes, make faster.
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* @param data
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* @param id
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*/
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static getChildIndexAbove(data: Data, id: string): number {
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const page = this.getPage(data)
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const shape = page.shapes[id]
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const siblings = Object.values(page.shapes)
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.filter(({ parentId }) => parentId === shape.parentId)
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.sort((a, b) => a.childIndex - b.childIndex)
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const index = siblings.indexOf(shape)
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const nextSibling = siblings[index + 1]
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if (!nextSibling) return shape.childIndex + 1
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let nextIndex = (shape.childIndex + nextSibling.childIndex) / 2
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if (nextIndex === nextSibling.childIndex) {
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this.forceIntegerChildIndices(siblings)
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nextIndex = (shape.childIndex + nextSibling.childIndex) / 2
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}
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return nextIndex
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}
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/**
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* Get the next child index below a shape.
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* @param data
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* @param id
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* @param pageId
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*/
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static getChildIndexBelow(data: Data, id: string): number {
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const page = this.getPage(data)
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const shape = page.shapes[id]
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const siblings = Object.values(page.shapes)
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.filter(({ parentId }) => parentId === shape.parentId)
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.sort((a, b) => a.childIndex - b.childIndex)
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const index = siblings.indexOf(shape)
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const prevSibling = siblings[index - 1]
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if (!prevSibling) {
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return shape.childIndex / 2
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}
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let nextIndex = (shape.childIndex + prevSibling.childIndex) / 2
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if (nextIndex === prevSibling.childIndex) {
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this.forceIntegerChildIndices(siblings)
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nextIndex = (shape.childIndex + prevSibling.childIndex) / 2
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}
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return (shape.childIndex + prevSibling.childIndex) / 2
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}
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/**
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* Assert whether a shape can have child shapes.
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* @param shape
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*/
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static assertParentShape(shape: Shape): asserts shape is ParentShape {
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if (!('children' in shape)) {
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throw new AssertionError({
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message: `That shape was not a parent (it was a ${shape.type}).`,
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})
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}
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}
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/**
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* Get the top child index for a shape. This is potentially provisional:
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* sorting all shapes on the page for each new created shape will become
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* slower as the page grows. High indices aren't a problem, so consider
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* tracking the highest index for the page when shapes are created / deleted.
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*
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* @param data
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* @param id
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*/
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static getTopChildIndex(data: Data, parent: Shape | Page): number {
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const page = this.getPage(data)
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// If the parent is a shape, return either 1 (if no other shapes) or the
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// highest sorted child index + 1.
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if (parent.type === 'page') {
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const children = Object.values(parent.shapes)
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if (children.length === 0) return 1
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return (
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children.sort((a, b) => b.childIndex - a.childIndex)[0].childIndex + 1
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)
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}
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// If the shape is a regular shape that can accept children, return either
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// 1 (if no other children) or the highest sorted child index + 1.
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this.assertParentShape(parent)
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if (parent.children.length === 0) return 1
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return (
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parent.children
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.map((id) => page.shapes[id])
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.sort((a, b) => b.childIndex - a.childIndex)[0].childIndex + 1
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)
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}
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/**
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* TODO: Make this recursive, so that it works for parented shapes.
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* Force all shapes on the page to have integer child indices.
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* @param shapes
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*/
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static forceIntegerChildIndices(shapes: Shape[]): void {
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for (let i = 0; i < shapes.length; i++) {
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const shape = shapes[i]
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getShapeUtils(shape).setProperty(shape, 'childIndex', i + 1)
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}
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}
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/**
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* Update the zoom CSS variable.
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* @param zoom ;
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*/
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static setZoomCSS(zoom: number): void {
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document.documentElement.style.setProperty('--camera-zoom', zoom.toString())
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}
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/* --------------------- Groups --------------------- */
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static getParentOffset(
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data: Data,
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shapeId: string,
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offset = [0, 0]
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): number[] {
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const shape = this.getShape(data, shapeId)
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return shape.parentId === data.currentPageId
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? offset
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: this.getParentOffset(data, shape.parentId, vec.add(offset, shape.point))
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}
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static getParentRotation(data: Data, shapeId: string, rotation = 0): number {
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const shape = this.getShape(data, shapeId)
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return shape.parentId === data.currentPageId
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? rotation + shape.rotation
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: this.getParentRotation(data, shape.parentId, rotation + shape.rotation)
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}
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static getDocumentBranch(data: Data, id: string): string[] {
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const shape = this.getPage(data).shapes[id]
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if (shape.type !== ShapeType.Group) return [id]
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return [
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id,
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...shape.children.flatMap((childId) =>
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this.getDocumentBranch(data, childId)
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),
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]
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}
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static getSelectedIds(data: Data): string[] {
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return data.pageStates[data.currentPageId].selectedIds
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}
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static setSelectedIds(data: Data, ids: string[]): string[] {
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data.pageStates[data.currentPageId].selectedIds = [...ids]
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return data.pageStates[data.currentPageId].selectedIds
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}
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static getTopParentId(data: Data, id: string): string {
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const shape = this.getPage(data).shapes[id]
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if (shape.parentId === shape.id) {
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console.error('Shape has the same id as its parent!', deepClone(shape))
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return shape.parentId
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}
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return shape.parentId === data.currentPageId ||
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shape.parentId === data.currentParentId
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? id
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: this.getTopParentId(data, shape.parentId)
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}
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/* ----------------- Shapes Related ----------------- */
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/**
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* Get a deep-cloned
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* @param data
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* @param fn
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*/
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static getSelectedBranchSnapshot<K>(
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data: Data,
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fn: <T extends Shape>(shape: T) => K
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): ({ id: string } & K)[]
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static getSelectedBranchSnapshot(data: Data): Shape[]
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static getSelectedBranchSnapshot<
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K,
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F extends <T extends Shape>(shape: T) => K
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>(data: Data, fn?: F): (Shape | K)[] {
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const page = this.getPage(data)
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const copies = this.getSelectedIds(data)
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.flatMap((id) =>
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this.getDocumentBranch(data, id).map((id) => page.shapes[id])
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)
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.filter((shape) => !shape.isLocked)
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.map(deepClone)
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if (fn !== undefined) {
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return copies.map((shape) => ({ id: shape.id, ...fn(shape) }))
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}
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return copies
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}
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/**
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* Get a deep-cloned array of shapes
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* @param data
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*/
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static getSelectedShapeSnapshot(data: Data): Shape[]
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static getSelectedShapeSnapshot<K>(
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data: Data,
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fn: <T extends Shape>(shape: T) => K
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): ({ id: string } & K)[]
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static getSelectedShapeSnapshot<
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K,
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F extends <T extends Shape>(shape: T) => K
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>(data: Data, fn?: F): (Shape | K)[] {
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const copies = this.getSelectedShapes(data)
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.filter((shape) => !shape.isLocked)
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.map(deepClone)
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if (fn !== undefined) {
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return copies.map((shape) => ({ id: shape.id, ...fn(shape) }))
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}
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return copies
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}
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/**
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* Get an array of all unique parentIds among a set of shapes.
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* @param data
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* @param shapes
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*/
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static getUniqueParentIds(data: Data, shapes: Shape[]): string[] {
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return Array.from(new Set(shapes.map((s) => s.parentId)).values()).filter(
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(id) => id !== data.currentPageId
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)
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}
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/**
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* Make an arbitrary change to shape.
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* @param data
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* @param ids
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* @param fn
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*/
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static mutateShape<T extends Shape>(
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data: Data,
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id: string,
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fn: (shapeUtils: ShapeUtility<T>, shape: T) => void,
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updateParents = true
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): T {
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const page = this.getPage(data)
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const shape = page.shapes[id] as T
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fn(getShapeUtils(shape) as ShapeUtility<T>, shape)
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if (updateParents) this.updateParents(data, [id])
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return shape
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}
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/**
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* Make an arbitrary change to a set of shapes.
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* @param data
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* @param ids
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* @param fn
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*/
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static mutateShapes<T extends Shape>(
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data: Data,
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ids: string[],
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fn: (shape: T, shapeUtils: ShapeUtility<T>, index: number) => T | void,
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updateParents = true
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): T[] {
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const page = this.getPage(data)
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const mutatedShapes = ids.map((id, i) => {
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const shape = page.shapes[id] as T
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// Define the new shape as either the (maybe new) shape returned by the
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// function or the mutated shape.
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page.shapes[id] =
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fn(shape, getShapeUtils(shape) as ShapeUtility<T>, i) || shape
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return page.shapes[id] as T
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})
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if (updateParents) this.updateParents(data, ids)
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return mutatedShapes
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}
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/**
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* Insert shapes into the current page.
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* @param data
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* @param shapes
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*/
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static insertShapes(data: Data, shapes: Shape[]): void {
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const page = this.getPage(data)
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shapes.forEach((shape) => {
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page.shapes[shape.id] = shape
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// Does the shape have a parent?
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if (shape.parentId !== data.currentPageId) {
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// The parent shape
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const parent = page.shapes[shape.parentId]
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// If the parent shape doesn't exist, assign the shape as a child
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// of the page instead.
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if (parent === undefined) {
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getShapeUtils(shape).setProperty(
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shape,
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'childIndex',
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this.getTopChildIndex(data, parent)
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)
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} else {
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// Add the shape's id to the parent's children, then sort the
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// new array just to be sure.
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getShapeUtils(parent).setProperty(
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parent,
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'children',
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[...parent.children, shape.id]
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.map((id) => page.shapes[id])
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.sort((a, b) => a.childIndex - b.childIndex)
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.map((shape) => shape.id)
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)
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}
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}
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})
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// Update any new parents
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this.updateParents(
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data,
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shapes.map((shape) => shape.id)
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)
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}
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static getRotatedBounds(shape: Shape): Bounds {
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return getShapeUtils(shape).getRotatedBounds(shape)
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}
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static getShapeBounds(shape: Shape): Bounds {
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return getShapeUtils(shape).getBounds(shape)
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}
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static getSelectedBounds(data: Data): Bounds {
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return getCommonBounds(
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...this.getSelectedShapes(data).map((shape) =>
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getShapeUtils(shape).getBounds(shape)
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)
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)
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}
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/**
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* Recursively update shape parents.
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* @param data
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* @param changedShapeIds
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*/
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static updateParents(data: Data, changedShapeIds: string[]): void {
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if (changedShapeIds.length === 0) return
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const { shapes } = this.getPage(data)
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const parentToUpdateIds = Array.from(
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new Set(changedShapeIds.map((id) => shapes[id].parentId).values())
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).filter((id) => id !== data.currentPageId)
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for (const parentId of parentToUpdateIds) {
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const parent = shapes[parentId] as GroupShape
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getShapeUtils(parent).onChildrenChange(
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parent,
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parent.children.map((id) => shapes[id])
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)
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shapes[parentId] = { ...parent }
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}
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this.updateParents(data, parentToUpdateIds)
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}
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}
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