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template.ts
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template.ts
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import * as utils from './utils';
import * as cf from './canvasFunctions'
import { UPDATE_PERIOD_MILLIS, SECONDS_SPENT_BLINKING, AMOUNT_OF_BLINKING, ANIMATION_DEFAULT_PERCENTAGE } from './constants';
import { ImageLoadHelper } from './imageLoadHelper';
import { ImageDataWithCoordinates } from './canvasFunctions';
interface TemplateParams {
name: string | undefined
sources: string[];
priorityMaskSources: string[];
x: number
y: number
frameWidth: number | undefined
frameHeight: number | undefined
frameCount: number | undefined
frameRate: number | undefined
frameSpeed: number | undefined // alias for frameRate
startTime: number | undefined
looping: boolean | undefined
}
export interface NamedURL {
name: string | undefined
url: string
}
export interface JsonParams {
contact: string | undefined
contactInfo: string | undefined // alias for contact
templates: TemplateParams[]
notifications: string | undefined // url to broadcaster
whitelist: NamedURL[]
blacklist: NamedURL[]
}
export class Template {
name: string | undefined
sources: string[];
priorityMaskSources: string[] | undefined;
x: number
y: number
frameWidth: number | undefined
frameHeight: number | undefined
frameCount: number
frameSpeed: number
startTime: number
looping: boolean
priority: number
globalCanvas: HTMLCanvasElement
imageLoader: ImageLoadHelper;
priorityMaskLoader: ImageLoadHelper;
canvasElement = document.createElement('canvas')
fullImageData: ImageData | undefined;
ditheredData: ImageData | undefined;
frameData: ImageData | null | undefined;
priorityData: ImageData | null | undefined;
contactElement: HTMLDivElement | undefined
initialContactCSS: CSSStyleDeclaration | undefined
blinkingPeriodMillis: number
animationDuration: number;
constructor(params: TemplateParams, contact: string | undefined, globalCanvas: HTMLCanvasElement, priority: number) {
// assign params
this.name = params.name
this.sources = params.sources
this.priorityMaskSources = params.priorityMaskSources
this.x = params.x
this.y = params.y
this.frameWidth = params.frameWidth
this.frameHeight = params.frameHeight
this.frameCount = params.frameCount || 1
this.frameSpeed = params.frameRate || params.frameSpeed || Infinity
this.startTime = params.startTime || 0
this.looping = params.looping || this.frameCount > 1
// assign from arguments
this.globalCanvas = globalCanvas
this.priority = priority
//calulate from consts
let period = SECONDS_SPENT_BLINKING * 1000 / AMOUNT_OF_BLINKING;
this.blinkingPeriodMillis = Math.floor(period / UPDATE_PERIOD_MILLIS) * UPDATE_PERIOD_MILLIS
this.animationDuration = (this.frameCount * this.frameSpeed)
//initialize image loaders
this.imageLoader = new ImageLoadHelper(this.name, this.sources)
this.priorityMaskLoader = new ImageLoadHelper(this.name, this.priorityMaskSources)
// add contact info container
this.contactX = Math.round(this.x / 5) * 5
this.contactY = Math.round(this.y / 5) * 5
if (contact) {
let checkingCoords = true
while (checkingCoords) {
checkingCoords = false
let contactInfos = this.globalCanvas.parentElement!.querySelectorAll('.iHasContactInfo')
for (let i = 0; i < contactInfos.length; i++) {
let child = contactInfos[i] as HTMLElement
let childX = parseInt(child.getAttribute('contactX') ?? '0')
let childY = parseInt(child.getAttribute('contactY') ?? '0')
let thisRight = this.contactX + 35
let childRight = childX + 35
let collision = this.contactX <= childRight && this.contactX >= childX || thisRight <= childRight && thisRight >= childX
if (
child
&& collision
&& Math.round(childY) === Math.round(this.contactY)
) {
checkingCoords = true
this.contactX += 5
this.contactY += 5
break
}
}
}
this.contactElement = document.createElement('div')
this.contactElement.setAttribute('contactX', this.contactX.toString())
this.contactElement.setAttribute('contactY', this.contactY.toString())
this.contactElement.style.left = `${this.contactX}px`;
this.contactElement.style.top = `${this.contactY}px`;
let contactPriority = Math.round(Number.MIN_SAFE_INTEGER / 100 + priority)
this.contactElement.setAttribute('priority', contactPriority.toString())
this.contactElement.className = 'iHasContactInfo'
if (params.name) {
this.contactElement.appendChild(document.createTextNode(params.name))
this.contactElement.appendChild(document.createElement('br'))
this.contactElement.appendChild(document.createTextNode(`contact: `))
}
this.contactElement.appendChild(document.createTextNode(contact))
this.insertPriorityElement(this.contactElement)
this.initialContactCSS = getComputedStyle(this.contactElement)
}
}
contactX: number | undefined
contactY: number | undefined
updateStyle(globalRatio: number, left: string, top: string, translate: string, transform: string, zIndex: string) {
this.canvasElement.style.width = `${this.frameWidth! * globalRatio}px`
this.canvasElement.style.height = `${this.frameHeight! * globalRatio}px`
if (left !== "auto")
this.canvasElement.style.left = `calc(${this.x * globalRatio}px + ${left})`
else
this.canvasElement.style.left = `${this.x * globalRatio}px`
if (top !== "auto")
this.canvasElement.style.top = `calc(${this.y * globalRatio}px + ${top})`
else
this.canvasElement.style.top = `${this.y * globalRatio}px`
this.canvasElement.style.translate = translate
this.canvasElement.style.transform = transform
this.canvasElement.style.zIndex = zIndex
if (this.contactElement) {
if (left !== "auto")
this.contactElement.style.left = `calc(${this.contactX! * globalRatio}px + ${left})`
else
this.contactElement.style.left = `${this.contactX! * globalRatio}px`
if (top !== "auto")
this.contactElement.style.top = `calc(${this.contactY! * globalRatio}px + ${top})`
else
this.contactElement.style.top = `${this.contactY! * globalRatio}px`
this.contactElement.style.maxWidth = `${30 * globalRatio}px`
this.contactElement.style.padding = `${globalRatio}px`
this.contactElement.style.fontSize = `${globalRatio}px`
this.contactElement.style.translate = translate
this.contactElement.style.transform = transform
this.contactElement.style.zIndex = zIndex
}
}
setContactInfoDisplay(enabled: boolean) {
if (this.contactElement) {
this.contactElement.style.opacity = enabled ? "1" : "0";
this.contactElement.style.pointerEvents = enabled ? "auto" : "none";
}
}
setPreviewMode(enabled: boolean) {
let data = enabled ? this.fullImageData! : this.ditheredData!
this.canvasElement.width = data.width
this.canvasElement.height = data.height
this.canvasElement.getContext('2d')?.putImageData(data, 0, 0)
}
hideTemplate(enabled: boolean) {
this.canvasElement.style.opacity = enabled ? "0" : "1";
}
getCurrentFrameIndex(currentSeconds: number) {
if (!this.looping && this.startTime + this.frameCount * this.frameSpeed < currentSeconds)
return this.frameCount - 1
return utils.negativeSafeModulo(Math.floor((currentSeconds - this.startTime) / this.frameSpeed), this.frameCount)
}
insertPriorityElement(element: HTMLElement) {
let container = this.globalCanvas.parentElement!
let priorityElements = container.children;
let priorityElementsArray: Array<Element> = Array.from(priorityElements).filter(el => el.hasAttribute('priority'));
if (priorityElementsArray.length === 0) {
container.appendChild(element)
} else {
priorityElementsArray.push(element)
priorityElementsArray.sort((a, b) => parseInt(b.getAttribute('priority')!) - parseInt(a.getAttribute('priority')!));
let index = priorityElementsArray.findIndex(el => el === element);
if (index === priorityElementsArray.length - 1) {
container.appendChild(element);
} else {
container.insertBefore(element, priorityElementsArray[index + 1]);
}
}
}
needsCanvasInitialization = true;
initCanvasIfNeeded(image: HTMLImageElement) {
if (this.needsCanvasInitialization) {
if (!this.frameWidth || !this.frameHeight) {
this.frameWidth = image.naturalWidth
this.frameHeight = image.naturalHeight
}
this.canvasElement.style.position = 'absolute'
this.canvasElement.style.top = `${this.y}px`;
this.canvasElement.style.left = `${this.x}px`;
this.canvasElement.style.width = `${this.frameWidth}px`;
this.canvasElement.style.height = `${this.frameHeight}px`;
this.canvasElement.style.pointerEvents = 'none'
this.canvasElement.style.imageRendering = 'pixelated'
this.canvasElement.setAttribute('priority', this.priority.toString())
this.insertPriorityElement(this.canvasElement)
this.needsCanvasInitialization = false
}
}
currentFrame: number | undefined
currentPercentage: number | undefined
currentRandomness: number | undefined
frameStartTime(n: number | null = null) {
return (this.startTime + (n || this.currentFrame || 0) * this.frameSpeed) % this.animationDuration
}
async update(higherTemplates: Template[], percentage: number, randomness: number, currentSeconds: number) {
// return if the animation is finished
if (!this.looping && currentSeconds > this.startTime + this.frameSpeed * this.frameCount) {
return;
}
let image = this.imageLoader.getImage()
let priorityMask = this.priorityMaskLoader.getImage()
// return if image isn't loaded yet
if (!image) return;
// else initialize canvas
this.initCanvasIfNeeded(image)
// return if canvas not initialized (works because last step of canvas initialization is inserting it to DOM)
if (!this.canvasElement.isConnected) {
return;
}
// set percentage for animated
let frameIndex = this.getCurrentFrameIndex(currentSeconds)
if (this.frameCount > 1 && this.frameSpeed > 30) {
let framePast = currentSeconds % this.animationDuration - this.frameStartTime(frameIndex)
let framePercentage = framePast / this.frameSpeed
if (framePercentage < 0.5) {
percentage *= ANIMATION_DEFAULT_PERCENTAGE
}
}
// update canvas if necessary
if (this.currentFrame !== frameIndex || this.currentPercentage !== percentage || this.currentRandomness !== randomness) {
if (!this.frameData || this.frameCount > 1)
this.frameData = cf.extractFrame(image, this.frameWidth!, this.frameHeight!, frameIndex)
if (!this.frameData) return;
if (priorityMask) {
if (!this.priorityData || this.frameCount > 1) {
this.priorityData = cf.extractFrame(priorityMask, this.frameWidth!, this.frameHeight!, frameIndex)
}
}
let frameDatas: ImageDataWithCoordinates[] = [];
for (let i = 0; i < higherTemplates.length; i++) {
let other = higherTemplates[i]
if (this.checkCollision(other) && other.frameData)
frameDatas.push({ imagedata: other.frameData, x: this.x - other.x, y: this.y - other.y })
// the x, y over here are our coords in relation to the other template
}
frameDatas.push({ imagedata: this.frameData, x: 0, y: 0 })
this.fullImageData = frameDatas[frameDatas.length - 1].imagedata
this.ditheredData = await cf.ditherData(frameDatas, this.priorityData, randomness, percentage, this.x, this.y, this.frameWidth!, this.frameHeight!)
this.canvasElement.width = this.ditheredData.width
this.canvasElement.height = this.ditheredData.height
this.canvasElement.getContext('2d')?.putImageData(this.ditheredData, 0, 0)
}
// update done
this.currentPercentage = percentage
this.currentFrame = frameIndex
this.currentRandomness = randomness
this.blinking(currentSeconds)
}
checkCollision(other: Template) {
if (!this.frameWidth || !this.frameHeight || !other.frameWidth || !other.frameHeight)
return false
let thisRight = this.x + this.frameWidth
let thisBottom = this.y + this.frameHeight
let otherRight = other.x + other.frameWidth
let otherBottom = other.y + other.frameHeight
if (
this.x > otherRight || // this template is to the right of the other template
thisRight < other.x || // this template is to the left of the other template
this.y > otherBottom || // this template is below the other template
thisBottom < other.y // this template is above the other template
) {
return false
}
return true
}
blinking(currentSeconds: number) {
// return if no blinking needed
if (this.frameSpeed === Infinity || this.frameSpeed < 30 || this.frameCount === 1) return;
let frameEndTime = this.frameStartTime() + this.frameSpeed
let blinkTime = (currentSeconds % this.animationDuration) + (AMOUNT_OF_BLINKING * this.blinkingPeriodMillis / 1000)
if (blinkTime > frameEndTime) {
let blinkDiff = blinkTime - frameEndTime
this.canvasElement.style.opacity = Math.floor(blinkDiff / (this.blinkingPeriodMillis / 1000)) % 2 === 0 ? '0' : '1'
} else {
this.canvasElement.style.opacity = '1'
}
}
destroy() {
this.imageLoader.destroy()
this.priorityMaskLoader.destroy()
this.canvasElement.parentElement?.removeChild(this.canvasElement)
this.canvasElement = document.createElement('canvas')
this.contactElement?.parentElement?.removeChild(this.contactElement)
this.contactElement = undefined
}
async fakeReload(time: number) {
this.canvasElement.style.opacity = '0'
await utils.sleep(300 + time)
this.canvasElement.style.opacity = '1'
}
}