ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
263 lines • 38 kB
JavaScript
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
import { DOCUMENT } from '@angular/common';
import { ChangeDetectionStrategy, Component, Input, inject, numberAttribute } from '@angular/core';
import { getPixelRatio, getStyleStr, reRendering, rotateWatermark } from './util';
import * as i0 from "@angular/core";
/**
* Base size of the canvas, 1 for parallel layout and 2 for alternate layout
* Only alternate layout is currently supported
*/
const BaseSize = 2;
const FontGap = 3;
export class NzWaterMarkComponent {
constructor(el, cdr) {
this.el = el;
this.cdr = cdr;
this.nzWidth = 120;
this.nzHeight = 64;
this.nzRotate = -22;
this.nzZIndex = 9;
this.nzImage = '';
this.nzContent = '';
this.nzFont = {};
this.nzGap = [100, 100];
this.nzOffset = [this.nzGap[0] / 2, this.nzGap[1] / 2];
this.document = inject(DOCUMENT);
this.waterMarkElement = this.document.createElement('div');
this.stopObservation = false;
this.observer = new MutationObserver(mutations => {
if (this.stopObservation) {
return;
}
mutations.forEach(mutation => {
if (reRendering(mutation, this.waterMarkElement)) {
this.destroyWatermark();
this.renderWatermark();
}
});
});
}
ngOnInit() {
this.observer.observe(this.el.nativeElement, {
subtree: true,
childList: true,
attributeFilter: ['style', 'class']
});
}
ngAfterViewInit() {
this.renderWatermark();
}
ngOnChanges(changes) {
const { nzRotate, nzZIndex, nzWidth, nzHeight, nzImage, nzContent, nzFont, gapX, gapY, offsetLeft, offsetTop } = changes;
if (nzRotate ||
nzZIndex ||
nzWidth ||
nzHeight ||
nzImage ||
nzContent ||
nzFont ||
gapX ||
gapY ||
offsetLeft ||
offsetTop) {
this.renderWatermark();
}
}
getFont() {
const font = {
color: 'rgba(0,0,0,.15)',
fontSize: 16,
fontWeight: 'normal',
fontFamily: 'sans-serif',
fontStyle: 'normal'
};
this.nzFont = { ...font, ...this.nzFont };
this.cdr.markForCheck();
}
getMarkStyle() {
const markStyle = {
zIndex: this.nzZIndex,
position: 'absolute',
left: 0,
top: 0,
width: '100%',
height: '100%',
pointerEvents: 'none',
backgroundRepeat: 'repeat',
visibility: 'visible'
};
/** Calculate the style of the nzOffset */
let positionLeft = (this.nzOffset?.[0] ?? this.nzGap[0] / 2) - this.nzGap[0] / 2;
let positionTop = (this.nzOffset?.[1] ?? this.nzGap[1] / 2) - this.nzGap[1] / 2;
if (positionLeft > 0) {
markStyle.left = `${positionLeft}px`;
markStyle.width = `calc(100% - ${positionLeft}px)`;
positionLeft = 0;
}
if (positionTop > 0) {
markStyle.top = `${positionTop}px`;
markStyle.height = `calc(100% - ${positionTop}px)`;
positionTop = 0;
}
markStyle.backgroundPosition = `${positionLeft}px ${positionTop}px`;
return markStyle;
}
destroyWatermark() {
if (this.waterMarkElement) {
this.waterMarkElement.remove();
}
}
appendWatermark(base64Url, markWidth) {
this.stopObservation = true;
this.waterMarkElement.setAttribute('style', getStyleStr({
...this.getMarkStyle(),
backgroundImage: `url('${base64Url}')`,
backgroundSize: `${(this.nzGap[0] + markWidth) * BaseSize}px`
}));
this.el.nativeElement.append(this.waterMarkElement);
this.cdr.markForCheck();
// Delayed execution
setTimeout(() => {
this.stopObservation = false;
this.cdr.markForCheck();
});
}
getMarkSize(ctx) {
let defaultWidth = 120;
let defaultHeight = 64;
if (!this.nzImage && ctx.measureText) {
ctx.font = `${Number(this.nzFont.fontSize)}px ${this.nzFont.fontFamily}`;
const contents = Array.isArray(this.nzContent) ? this.nzContent : [this.nzContent];
const widths = contents.map(item => ctx.measureText(item).width);
defaultWidth = Math.ceil(Math.max(...widths));
defaultHeight = Number(this.nzFont.fontSize) * contents.length + (contents.length - 1) * FontGap;
}
return [this.nzWidth ?? defaultWidth, this.nzHeight ?? defaultHeight];
}
fillTexts(ctx, drawX, drawY, drawWidth, drawHeight) {
const ratio = getPixelRatio();
const mergedFontSize = Number(this.nzFont.fontSize) * ratio;
ctx.font = `${this.nzFont.fontStyle} normal ${this.nzFont.fontWeight} ${mergedFontSize}px/${drawHeight}px ${this.nzFont.fontFamily}`;
if (this.nzFont.color)
ctx.fillStyle = this.nzFont.color;
ctx.textAlign = 'center';
ctx.textBaseline = 'top';
ctx.translate(drawWidth / 2, 0);
const contents = Array.isArray(this.nzContent) ? this.nzContent : [this.nzContent];
contents?.forEach((item, index) => {
ctx.fillText(item ?? '', drawX, drawY + index * (mergedFontSize + FontGap * ratio));
});
}
drawText(canvas, ctx, drawX, drawY, drawWidth, drawHeight, alternateRotateX, alternateRotateY, alternateDrawX, alternateDrawY, markWidth) {
this.fillTexts(ctx, drawX, drawY, drawWidth, drawHeight);
/** Fill the interleaved text after rotation */
ctx.restore();
rotateWatermark(ctx, alternateRotateX, alternateRotateY, this.nzRotate);
this.fillTexts(ctx, alternateDrawX, alternateDrawY, drawWidth, drawHeight);
this.appendWatermark(canvas.toDataURL(), markWidth);
}
renderWatermark() {
if (!this.nzContent && !this.nzImage) {
return;
}
const canvas = this.document.createElement('canvas');
const ctx = canvas.getContext('2d');
if (ctx) {
if (!this.waterMarkElement) {
this.waterMarkElement = this.document.createElement('div');
}
this.getFont();
const ratio = getPixelRatio();
const [markWidth, markHeight] = this.getMarkSize(ctx);
const canvasWidth = (this.nzGap[0] + markWidth) * ratio;
const canvasHeight = (this.nzGap[1] + markHeight) * ratio;
canvas.setAttribute('width', `${canvasWidth * BaseSize}px`);
canvas.setAttribute('height', `${canvasHeight * BaseSize}px`);
const drawX = (this.nzGap[0] * ratio) / 2;
const drawY = (this.nzGap[1] * ratio) / 2;
const drawWidth = markWidth * ratio;
const drawHeight = markHeight * ratio;
const rotateX = (drawWidth + this.nzGap[0] * ratio) / 2;
const rotateY = (drawHeight + this.nzGap[1] * ratio) / 2;
/** Alternate drawing parameters */
const alternateDrawX = drawX + canvasWidth;
const alternateDrawY = drawY + canvasHeight;
const alternateRotateX = rotateX + canvasWidth;
const alternateRotateY = rotateY + canvasHeight;
ctx.save();
rotateWatermark(ctx, rotateX, rotateY, this.nzRotate);
if (this.nzImage) {
const img = new Image();
const onLoad = () => {
cleanup();
ctx.drawImage(img, drawX, drawY, drawWidth, drawHeight);
/** Draw interleaved pictures after rotation */
ctx.restore();
rotateWatermark(ctx, alternateRotateX, alternateRotateY, this.nzRotate);
ctx.drawImage(img, alternateDrawX, alternateDrawY, drawWidth, drawHeight);
this.appendWatermark(canvas.toDataURL(), markWidth);
};
const onError = () => {
cleanup();
this.drawText(canvas, ctx, drawX, drawY, drawWidth, drawHeight, alternateRotateX, alternateRotateY, alternateDrawX, alternateDrawY, markWidth);
};
const cleanup = () => {
img.removeEventListener('load', onLoad);
img.removeEventListener('error', onError);
};
img.addEventListener('load', onLoad);
img.addEventListener('error', onError);
img.crossOrigin = 'anonymous';
img.referrerPolicy = 'no-referrer';
img.src = this.nzImage;
}
else {
this.drawText(canvas, ctx, drawX, drawY, drawWidth, drawHeight, alternateRotateX, alternateRotateY, alternateDrawX, alternateDrawY, markWidth);
}
}
}
ngOnDestroy() {
this.observer.disconnect();
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.1", ngImport: i0, type: NzWaterMarkComponent, deps: [{ token: i0.ElementRef }, { token: i0.ChangeDetectorRef }], target: i0.ɵɵFactoryTarget.Component }); }
static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "16.1.0", version: "18.2.1", type: NzWaterMarkComponent, isStandalone: true, selector: "nz-water-mark", inputs: { nzWidth: ["nzWidth", "nzWidth", numberAttribute], nzHeight: ["nzHeight", "nzHeight", numberAttribute], nzRotate: ["nzRotate", "nzRotate", numberAttribute], nzZIndex: ["nzZIndex", "nzZIndex", numberAttribute], nzImage: "nzImage", nzContent: "nzContent", nzFont: "nzFont", nzGap: "nzGap", nzOffset: "nzOffset" }, host: { classAttribute: "ant-water-mark" }, exportAs: ["NzWaterMark"], usesOnChanges: true, ngImport: i0, template: ` <ng-content></ng-content> `, isInline: true, changeDetection: i0.ChangeDetectionStrategy.OnPush }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.1", ngImport: i0, type: NzWaterMarkComponent, decorators: [{
type: Component,
args: [{
selector: 'nz-water-mark',
standalone: true,
exportAs: 'NzWaterMark',
changeDetection: ChangeDetectionStrategy.OnPush,
template: ` <ng-content></ng-content> `,
host: {
class: 'ant-water-mark'
}
}]
}], ctorParameters: () => [{ type: i0.ElementRef }, { type: i0.ChangeDetectorRef }], propDecorators: { nzWidth: [{
type: Input,
args: [{ transform: numberAttribute }]
}], nzHeight: [{
type: Input,
args: [{ transform: numberAttribute }]
}], nzRotate: [{
type: Input,
args: [{ transform: numberAttribute }]
}], nzZIndex: [{
type: Input,
args: [{ transform: numberAttribute }]
}], nzImage: [{
type: Input
}], nzContent: [{
type: Input
}], nzFont: [{
type: Input
}], nzGap: [{
type: Input
}], nzOffset: [{
type: Input
}] } });
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* Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport { DOCUMENT } from '@angular/common';\nimport {\n  AfterViewInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ElementRef,\n  Input,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  SimpleChanges,\n  inject,\n  numberAttribute\n} from '@angular/core';\n\nimport { FontType, MarkStyleType } from './typings';\nimport { getPixelRatio, getStyleStr, reRendering, rotateWatermark } from './util';\n\n/**\n * Base size of the canvas, 1 for parallel layout and 2 for alternate layout\n * Only alternate layout is currently supported\n */\nconst BaseSize = 2;\nconst FontGap = 3;\n\n@Component({\n  selector: 'nz-water-mark',\n  standalone: true,\n  exportAs: 'NzWaterMark',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  template: ` <ng-content></ng-content> `,\n  host: {\n    class: 'ant-water-mark'\n  }\n})\nexport class NzWaterMarkComponent implements AfterViewInit, OnInit, OnChanges, OnDestroy {\n  @Input({ transform: numberAttribute }) nzWidth: number = 120;\n  @Input({ transform: numberAttribute }) nzHeight: number = 64;\n  @Input({ transform: numberAttribute }) nzRotate: number = -22;\n  @Input({ transform: numberAttribute }) nzZIndex: number = 9;\n  @Input() nzImage: string = '';\n  @Input() nzContent: string | string[] = '';\n  @Input() nzFont: FontType = {};\n  @Input() nzGap: [number, number] = [100, 100];\n  @Input() nzOffset: [number, number] = [this.nzGap[0] / 2, this.nzGap[1] / 2];\n\n  private document: Document = inject(DOCUMENT);\n\n  waterMarkElement: HTMLDivElement = this.document.createElement('div');\n  stopObservation: boolean = false;\n\n  observer = new MutationObserver(mutations => {\n    if (this.stopObservation) {\n      return;\n    }\n    mutations.forEach(mutation => {\n      if (reRendering(mutation, this.waterMarkElement)) {\n        this.destroyWatermark();\n        this.renderWatermark();\n      }\n    });\n  });\n\n  constructor(\n    private el: ElementRef,\n    private cdr: ChangeDetectorRef\n  ) {}\n\n  ngOnInit(): void {\n    this.observer.observe(this.el.nativeElement, {\n      subtree: true,\n      childList: true,\n      attributeFilter: ['style', 'class']\n    });\n  }\n\n  ngAfterViewInit(): void {\n    this.renderWatermark();\n  }\n\n  ngOnChanges(changes: SimpleChanges): void {\n    const { nzRotate, nzZIndex, nzWidth, nzHeight, nzImage, nzContent, nzFont, gapX, gapY, offsetLeft, offsetTop } =\n      changes;\n\n    if (\n      nzRotate ||\n      nzZIndex ||\n      nzWidth ||\n      nzHeight ||\n      nzImage ||\n      nzContent ||\n      nzFont ||\n      gapX ||\n      gapY ||\n      offsetLeft ||\n      offsetTop\n    ) {\n      this.renderWatermark();\n    }\n  }\n\n  getFont(): void {\n    const font: FontType = {\n      color: 'rgba(0,0,0,.15)',\n      fontSize: 16,\n      fontWeight: 'normal',\n      fontFamily: 'sans-serif',\n      fontStyle: 'normal'\n    };\n\n    this.nzFont = { ...font, ...this.nzFont };\n    this.cdr.markForCheck();\n  }\n\n  getMarkStyle(): MarkStyleType {\n    const markStyle: MarkStyleType = {\n      zIndex: this.nzZIndex,\n      position: 'absolute',\n      left: 0,\n      top: 0,\n      width: '100%',\n      height: '100%',\n      pointerEvents: 'none',\n      backgroundRepeat: 'repeat',\n      visibility: 'visible'\n    };\n\n    /** Calculate the style of the nzOffset */\n    let positionLeft = (this.nzOffset?.[0] ?? this.nzGap[0] / 2) - this.nzGap[0] / 2;\n    let positionTop = (this.nzOffset?.[1] ?? this.nzGap[1] / 2) - this.nzGap[1] / 2;\n    if (positionLeft > 0) {\n      markStyle.left = `${positionLeft}px`;\n      markStyle.width = `calc(100% - ${positionLeft}px)`;\n      positionLeft = 0;\n    }\n    if (positionTop > 0) {\n      markStyle.top = `${positionTop}px`;\n      markStyle.height = `calc(100% - ${positionTop}px)`;\n      positionTop = 0;\n    }\n    markStyle.backgroundPosition = `${positionLeft}px ${positionTop}px`;\n\n    return markStyle;\n  }\n\n  destroyWatermark(): void {\n    if (this.waterMarkElement) {\n      this.waterMarkElement.remove();\n    }\n  }\n\n  appendWatermark(base64Url: string, markWidth: number): void {\n    this.stopObservation = true;\n    this.waterMarkElement.setAttribute(\n      'style',\n      getStyleStr({\n        ...this.getMarkStyle(),\n        backgroundImage: `url('${base64Url}')`,\n        backgroundSize: `${(this.nzGap[0] + markWidth) * BaseSize}px`\n      })\n    );\n    this.el.nativeElement.append(this.waterMarkElement);\n    this.cdr.markForCheck();\n\n    // Delayed execution\n    setTimeout(() => {\n      this.stopObservation = false;\n      this.cdr.markForCheck();\n    });\n  }\n\n  getMarkSize(ctx: CanvasRenderingContext2D): [number, number] {\n    let defaultWidth = 120;\n    let defaultHeight = 64;\n    if (!this.nzImage && ctx.measureText) {\n      ctx.font = `${Number(this.nzFont.fontSize)}px ${this.nzFont.fontFamily}`;\n      const contents = Array.isArray(this.nzContent) ? this.nzContent : [this.nzContent];\n      const widths = contents.map(item => ctx.measureText(item!).width);\n      defaultWidth = Math.ceil(Math.max(...widths));\n      defaultHeight = Number(this.nzFont.fontSize) * contents.length + (contents.length - 1) * FontGap;\n    }\n    return [this.nzWidth ?? defaultWidth, this.nzHeight ?? defaultHeight];\n  }\n\n  fillTexts(ctx: CanvasRenderingContext2D, drawX: number, drawY: number, drawWidth: number, drawHeight: number): void {\n    const ratio = getPixelRatio();\n    const mergedFontSize = Number(this.nzFont.fontSize) * ratio;\n    ctx.font = `${this.nzFont.fontStyle} normal ${this.nzFont.fontWeight} ${mergedFontSize}px/${drawHeight}px ${this.nzFont.fontFamily}`;\n    if (this.nzFont.color) ctx.fillStyle = this.nzFont.color;\n    ctx.textAlign = 'center';\n    ctx.textBaseline = 'top';\n    ctx.translate(drawWidth / 2, 0);\n    const contents = Array.isArray(this.nzContent) ? this.nzContent : [this.nzContent];\n    contents?.forEach((item, index) => {\n      ctx.fillText(item ?? '', drawX, drawY + index * (mergedFontSize + FontGap * ratio));\n    });\n  }\n\n  drawText(\n    canvas: HTMLCanvasElement,\n    ctx: CanvasRenderingContext2D,\n    drawX: number,\n    drawY: number,\n    drawWidth: number,\n    drawHeight: number,\n    alternateRotateX: number,\n    alternateRotateY: number,\n    alternateDrawX: number,\n    alternateDrawY: number,\n    markWidth: number\n  ): void {\n    this.fillTexts(ctx, drawX, drawY, drawWidth, drawHeight);\n\n    /** Fill the interleaved text after rotation */\n    ctx.restore();\n    rotateWatermark(ctx, alternateRotateX, alternateRotateY, this.nzRotate);\n    this.fillTexts(ctx, alternateDrawX, alternateDrawY, drawWidth, drawHeight);\n    this.appendWatermark(canvas.toDataURL(), markWidth);\n  }\n\n  renderWatermark(): void {\n    if (!this.nzContent && !this.nzImage) {\n      return;\n    }\n    const canvas: HTMLCanvasElement = this.document.createElement('canvas');\n    const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;\n\n    if (ctx) {\n      if (!this.waterMarkElement) {\n        this.waterMarkElement = this.document.createElement('div');\n      }\n      this.getFont();\n      const ratio = getPixelRatio();\n      const [markWidth, markHeight] = this.getMarkSize(ctx);\n      const canvasWidth = (this.nzGap[0] + markWidth) * ratio;\n      const canvasHeight = (this.nzGap[1] + markHeight) * ratio;\n      canvas.setAttribute('width', `${canvasWidth * BaseSize}px`);\n      canvas.setAttribute('height', `${canvasHeight * BaseSize}px`);\n\n      const drawX = (this.nzGap[0] * ratio) / 2;\n      const drawY = (this.nzGap[1] * ratio) / 2;\n      const drawWidth = markWidth * ratio;\n      const drawHeight = markHeight * ratio;\n      const rotateX = (drawWidth + this.nzGap[0] * ratio) / 2;\n      const rotateY = (drawHeight + this.nzGap[1] * ratio) / 2;\n\n      /** Alternate drawing parameters */\n      const alternateDrawX = drawX + canvasWidth;\n      const alternateDrawY = drawY + canvasHeight;\n      const alternateRotateX = rotateX + canvasWidth;\n      const alternateRotateY = rotateY + canvasHeight;\n\n      ctx.save();\n      rotateWatermark(ctx, rotateX, rotateY, this.nzRotate);\n\n      if (this.nzImage) {\n        const img = new Image();\n\n        const onLoad = (): void => {\n          cleanup();\n\n          ctx.drawImage(img, drawX, drawY, drawWidth, drawHeight);\n\n          /** Draw interleaved pictures after rotation */\n          ctx.restore();\n          rotateWatermark(ctx, alternateRotateX, alternateRotateY, this.nzRotate);\n          ctx.drawImage(img, alternateDrawX, alternateDrawY, drawWidth, drawHeight);\n          this.appendWatermark(canvas.toDataURL(), markWidth);\n        };\n\n        const onError = (): void => {\n          cleanup();\n\n          this.drawText(\n            canvas,\n            ctx,\n            drawX,\n            drawY,\n            drawWidth,\n            drawHeight,\n            alternateRotateX,\n            alternateRotateY,\n            alternateDrawX,\n            alternateDrawY,\n            markWidth\n          );\n        };\n\n        const cleanup = (): void => {\n          img.removeEventListener('load', onLoad);\n          img.removeEventListener('error', onError);\n        };\n\n        img.addEventListener('load', onLoad);\n        img.addEventListener('error', onError);\n\n        img.crossOrigin = 'anonymous';\n        img.referrerPolicy = 'no-referrer';\n        img.src = this.nzImage;\n      } else {\n        this.drawText(\n          canvas,\n          ctx,\n          drawX,\n          drawY,\n          drawWidth,\n          drawHeight,\n          alternateRotateX,\n          alternateRotateY,\n          alternateDrawX,\n          alternateDrawY,\n          markWidth\n        );\n      }\n    }\n  }\n\n  ngOnDestroy(): void {\n    this.observer.disconnect();\n  }\n}\n"]}