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import { State, Store } from "@ngrx/store"
import hotkeys from "hotkeys-js"
import html2canvas from "html2canvas"
import { Color, WebGLRenderer } from "three"
import { checkWriteToClipboardAllowed, setToClipboard } from "../../../../app/codeCharta/util/clipboard/clipboardWriter"
import { CcState } from "../../codeCharta.model"
import { screenshotToClipboardEnabledSelector } from "../../state/store/appSettings/enableClipboard/screenshotToClipboardEnabled.selector"
import { ThreeCameraService } from "../codeMap/threeViewer/threeCamera.service"
import { ThreeRendererService } from "../codeMap/threeViewer/threeRenderer.service"
import { ThreeSceneService } from "../codeMap/threeViewer/threeSceneService"
import { createPNGFileName } from "../../model/files/files.helper"
import { FileState } from "../../model/files/files"
import { ActionIconComponent } from "../actionIcon/actionIcon.component"
import { AsyncPipe } from "@angular/common"
@Component({
selector: "cc-screenshot-button",
templateUrl: "./screenshotButton.component.html",
standalone: true,
imports: [ActionIconComponent, AsyncPipe]
})
export class ScreenshotButtonComponent {
TITLE_FILE_BUTTON: string
TITLE_CLIPBOARD_BUTTON: string
isWriteToClipboardAllowed: boolean
SCREENSHOT_HOTKEY_TO_FILE = "Ctrl+Alt+S"
SCREENSHOT_HOTKEY_TO_CLIPBOARD = "Ctrl+Alt+F"
isScreenshotToClipboardEnabled$ = this.store.select(screenshotToClipboardEnabledSelector)
constructor(
private threeCameraService: ThreeCameraService,
private threeSceneService: ThreeSceneService,
private threeRendererService: ThreeRendererService,
private store: Store<CcState>,
private state: State<CcState>
) {}
ngOnInit() {
this.isWriteToClipboardAllowed = checkWriteToClipboardAllowed()
this.TITLE_CLIPBOARD_BUTTON = this.createTitleClipboardButton()
this.TITLE_FILE_BUTTON = this.createTitleFileButton()
hotkeys(this.SCREENSHOT_HOTKEY_TO_FILE, () => {
this.makeScreenshotToFile()
})
hotkeys(this.SCREENSHOT_HOTKEY_TO_CLIPBOARD, () => {
this.makeScreenshotToClipboard()
})
}
async makeScreenshotToFile() {
const renderer = this.threeRendererService.renderer
const renderSettings = this.saveRenderSettings(renderer)
const canvas = await this.buildScreenShotCanvas(renderer)
this.downloadScreenshot(canvas, this.state.getValue().files)
this.applyRenderSettings(renderer, renderSettings)
}
async makeScreenshotToClipboard() {
if (!this.isWriteToClipboardAllowed) {
return
}
const renderer = this.threeRendererService.renderer
const renderSettings = this.saveRenderSettings(renderer)
const canvas = await this.buildScreenShotCanvas(renderer)
const canvasToBlobPromise: Promise<Blob> = new Promise(resolve => canvas.toBlob(resolve))
this.applyRenderSettings(renderer, renderSettings)
const blob = await canvasToBlobPromise
await setToClipboard(blob)
}
private downloadScreenshot(canvas: HTMLCanvasElement, files: FileState[]) {
const dataUrl = canvas.toDataURL("image/png")
const downloadLink = document.createElement("a")
downloadLink.download = createPNGFileName(files, "map")
downloadLink.href = dataUrl
document.body.appendChild(downloadLink)
downloadLink.click()
downloadLink.remove()
}
private saveRenderSettings(renderer: WebGLRenderer) {
const pixelRatio = renderer.getPixelRatio()
const clearColor = new Color()
renderer.getClearColor(clearColor)
return { pixelRatio, clearColor }
}
private applyRenderSettings(renderer: WebGLRenderer, settings: { pixelRatio: number; clearColor: Color }) {
const { pixelRatio, clearColor } = settings
renderer.setPixelRatio(pixelRatio)
renderer.setClearColor(clearColor)
renderer.render(this.threeSceneService.scene, this.threeCameraService.camera)
}
private async buildScreenShotCanvas(renderer: WebGLRenderer): Promise<HTMLCanvasElement> {
renderer.setPixelRatio(window.devicePixelRatio)
renderer.setClearColor(new Color(0, 0, 0), 0)
renderer.render(this.threeSceneService.scene, this.threeCameraService.camera)
const tagsNamesToIgnore = new Set([
"cc-logo",
"cc-tool-bar",
"cc-view-cube",
"cc-ribbon-bar",
"cc-file-extension-bar",
"cc-attribute-side-bar",
"cc-loading-file-progess-spinner"
])
const idsToIgnore = new Set(["legend-panel-button"])
const bodyHeight = document.querySelector("body")?.offsetHeight
const ribbonBarHeight = (document.querySelector("cc-ribbon-bar") as HTMLElement)?.offsetHeight
const toolBarHeight = (document.querySelector("cc-tool-bar") as HTMLElement)?.offsetHeight
const fileExtensionBarHeight = (document.querySelector("cc-file-extension-bar") as HTMLElement)?.offsetHeight
const offsetMenuBar = ribbonBarHeight + toolBarHeight + fileExtensionBarHeight
const canvas = await html2canvas(document.querySelector("body"), {
removeContainer: true,
backgroundColor: "#00",
scrollY: -offsetMenuBar,
height: bodyHeight - offsetMenuBar,
ignoreElements(element) {
return (
tagsNamesToIgnore.has(element.tagName.toLowerCase()) ||
idsToIgnore.has(element.id) ||
(element as HTMLElement).style.zIndex === "10000"
)
}
})
return this.getCroppedCanvas(canvas)
}
private getCroppedCanvas(canvas: HTMLCanvasElement) {
const context = canvas.getContext("2d")
const width = canvas.width
const height = canvas.height
const imageData = context.getImageData(0, 0, width, height)
const data = imageData.data
let minX = width,
minY = height,
maxX = 0,
maxY = 0
for (let x = 0; x < width; x++) {
for (let y = 0; y < height; y++) {
const alpha = data[(width * y + x) * 4 + 3]
if (alpha > 0) {
minX = Math.min(minX, x)
maxX = Math.max(maxX, x)
minY = Math.min(minY, y)
maxY = Math.max(maxY, y)
}
}
}
const croppedCanvas = document.createElement("canvas")
const croppedContext = croppedCanvas.getContext("2d")
croppedCanvas.width = maxX - minX + 1
croppedCanvas.height = maxY - minY + 1
croppedContext.drawImage(
canvas,
minX,
minY,
croppedCanvas.width,
croppedCanvas.height,
0,
0,
croppedCanvas.width,
croppedCanvas.height
)
return croppedCanvas
}
private createTitleClipboardButton() {
return this.isWriteToClipboardAllowed
? `Take a screenshot of the map with ${this.SCREENSHOT_HOTKEY_TO_CLIPBOARD} (copy to clipboard) or ${this.SCREENSHOT_HOTKEY_TO_FILE} (save as file)`
: "Firefox does not support copying to clipboard"
}
private createTitleFileButton() {
return `Take a screenshot of the map with ${this.SCREENSHOT_HOTKEY_TO_FILE} (save as file) or ${this.SCREENSHOT_HOTKEY_TO_CLIPBOARD} (copy to clipboard)`
}
}
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