ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
87 lines • 15.2 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 qrcodegen from './qrcodegen';
export const ERROR_LEVEL_MAP = {
L: qrcodegen.QrCode.Ecc.LOW,
M: qrcodegen.QrCode.Ecc.MEDIUM,
Q: qrcodegen.QrCode.Ecc.QUARTILE,
H: qrcodegen.QrCode.Ecc.HIGH
};
const DEFAULT_SIZE = 160;
const DEFAULT_SCALE = 10;
const DEFAULT_PADDING = 10;
const DEFAULT_COLOR = '#000000';
const DEFAULT_BACKGROUND_COLOR = '#FFFFFF';
const DEFAULT_ICONSIZE = 40;
const DEFAULT_LEVEL = 'M';
export const plotQRCodeData = (value, level = DEFAULT_LEVEL) => {
if (!value) {
return null;
}
return qrcodegen.QrCode.encodeText(value, ERROR_LEVEL_MAP[level]);
};
export function drawCanvas(canvas, value, size = DEFAULT_SIZE, scale = DEFAULT_SCALE, padding = DEFAULT_PADDING, color = DEFAULT_COLOR, backgroundColor = DEFAULT_BACKGROUND_COLOR, iconSize = DEFAULT_ICONSIZE, icon) {
const ctx = canvas.getContext('2d');
const formattedPadding = formatPadding(padding);
canvas.style.width = `${size}px`;
canvas.style.height = `${size}px`;
if (!value) {
ctx.fillStyle = 'rgba(0, 0, 0, 0)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
return;
}
canvas.width = value.size * scale + formattedPadding[1] + formattedPadding[3];
canvas.height = value.size * scale + formattedPadding[0] + formattedPadding[2];
if (!icon) {
drawCanvasBackground(ctx, canvas.width, canvas.height, scale, backgroundColor);
drawCanvasColor(ctx, value, scale, formattedPadding, backgroundColor, color);
}
else {
const iconImg = new Image();
iconImg.src = icon;
iconImg.crossOrigin = 'anonymous';
iconImg.width = iconSize * (canvas.width / size);
iconImg.height = iconSize * (canvas.width / size);
iconImg.onload = () => {
drawCanvasBackground(ctx, canvas.width, canvas.height, scale, backgroundColor);
drawCanvasColor(ctx, value, scale, formattedPadding, backgroundColor, color);
const iconCoordinate = canvas.width / 2 - (iconSize * (canvas.width / size)) / 2;
ctx.fillRect(iconCoordinate, iconCoordinate, iconSize * (canvas.width / size), iconSize * (canvas.width / size));
ctx.drawImage(iconImg, iconCoordinate, iconCoordinate, iconSize * (canvas.width / size), iconSize * (canvas.width / size));
};
iconImg.onerror = () => {
drawCanvasBackground(ctx, canvas.width, canvas.height, scale, backgroundColor);
drawCanvasColor(ctx, value, scale, formattedPadding, backgroundColor, color);
};
}
}
export function drawCanvasColor(ctx, value, scale, padding, backgroundColor, color) {
for (let y = 0; y < value.size; y++) {
for (let x = 0; x < value.size; x++) {
ctx.fillStyle = value.getModule(x, y) ? color : backgroundColor;
ctx.fillRect(padding[3] + x * scale, padding[0] + y * scale, scale, scale);
}
}
}
export function drawCanvasBackground(ctx, width, height, scale, backgroundColor) {
for (let y = 0; y < height; y++) {
for (let x = 0; x < width; x++) {
ctx.fillStyle = backgroundColor;
ctx.fillRect(x * scale, y * scale, scale, scale);
}
}
}
export function formatPadding(padding) {
if (Array.isArray(padding)) {
// Build an array of 4 elements and repeat values from padding as necessary to set the value of the array
return Array(4)
.fill(0)
.map((_, index) => padding[index % padding.length]);
}
else {
return [padding, padding, padding, padding];
}
}
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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 qrcodegen from './qrcodegen';\n\nexport const ERROR_LEVEL_MAP: { [index in 'L' | 'M' | 'Q' | 'H']: qrcodegen.QrCode.Ecc } = {\n  L: qrcodegen.QrCode.Ecc.LOW,\n  M: qrcodegen.QrCode.Ecc.MEDIUM,\n  Q: qrcodegen.QrCode.Ecc.QUARTILE,\n  H: qrcodegen.QrCode.Ecc.HIGH\n} as const;\n\nconst DEFAULT_SIZE = 160;\nconst DEFAULT_SCALE = 10;\nconst DEFAULT_PADDING = 10;\nconst DEFAULT_COLOR = '#000000';\nconst DEFAULT_BACKGROUND_COLOR = '#FFFFFF';\nconst DEFAULT_ICONSIZE = 40;\nconst DEFAULT_LEVEL: keyof typeof ERROR_LEVEL_MAP = 'M';\n\nexport const plotQRCodeData = (\n  value: string,\n  level: keyof typeof ERROR_LEVEL_MAP = DEFAULT_LEVEL\n): qrcodegen.QrCode | null => {\n  if (!value) {\n    return null;\n  }\n  return qrcodegen.QrCode.encodeText(value, ERROR_LEVEL_MAP[level]);\n};\n\nexport function drawCanvas(\n  canvas: HTMLCanvasElement,\n  value: qrcodegen.QrCode | null,\n  size = DEFAULT_SIZE,\n  scale = DEFAULT_SCALE,\n  padding: number | number[] = DEFAULT_PADDING,\n  color = DEFAULT_COLOR,\n  backgroundColor = DEFAULT_BACKGROUND_COLOR,\n  iconSize = DEFAULT_ICONSIZE,\n  icon?: string\n): void {\n  const ctx = canvas.getContext('2d') as CanvasRenderingContext2D;\n  const formattedPadding = formatPadding(padding);\n  canvas.style.width = `${size}px`;\n  canvas.style.height = `${size}px`;\n  if (!value) {\n    ctx.fillStyle = 'rgba(0, 0, 0, 0)';\n    ctx.fillRect(0, 0, canvas.width, canvas.height);\n    return;\n  }\n  canvas.width = value.size * scale + formattedPadding[1] + formattedPadding[3];\n  canvas.height = value.size * scale + formattedPadding[0] + formattedPadding[2];\n  if (!icon) {\n    drawCanvasBackground(ctx, canvas.width, canvas.height, scale, backgroundColor);\n    drawCanvasColor(ctx, value, scale, formattedPadding, backgroundColor, color);\n  } else {\n    const iconImg = new Image();\n    iconImg.src = icon;\n    iconImg.crossOrigin = 'anonymous';\n    iconImg.width = iconSize * (canvas.width / size);\n    iconImg.height = iconSize * (canvas.width / size);\n    iconImg.onload = () => {\n      drawCanvasBackground(ctx, canvas.width, canvas.height, scale, backgroundColor);\n      drawCanvasColor(ctx, value, scale, formattedPadding, backgroundColor, color);\n      const iconCoordinate = canvas.width / 2 - (iconSize * (canvas.width / size)) / 2;\n\n      ctx.fillRect(iconCoordinate, iconCoordinate, iconSize * (canvas.width / size), iconSize * (canvas.width / size));\n      ctx.drawImage(\n        iconImg,\n        iconCoordinate,\n        iconCoordinate,\n        iconSize * (canvas.width / size),\n        iconSize * (canvas.width / size)\n      );\n    };\n    iconImg.onerror = () => {\n      drawCanvasBackground(ctx, canvas.width, canvas.height, scale, backgroundColor);\n      drawCanvasColor(ctx, value, scale, formattedPadding, backgroundColor, color);\n    };\n  }\n}\n\nexport function drawCanvasColor(\n  ctx: CanvasRenderingContext2D,\n  value: qrcodegen.QrCode,\n  scale: number,\n  padding: number[],\n  backgroundColor: string,\n  color: string\n): void {\n  for (let y = 0; y < value.size; y++) {\n    for (let x = 0; x < value.size; x++) {\n      ctx.fillStyle = value.getModule(x, y) ? color : backgroundColor;\n      ctx.fillRect(padding[3] + x * scale, padding[0] + y * scale, scale, scale);\n    }\n  }\n}\n\nexport function drawCanvasBackground(\n  ctx: CanvasRenderingContext2D,\n  width: number,\n  height: number,\n  scale: number,\n  backgroundColor: string\n): void {\n  for (let y = 0; y < height; y++) {\n    for (let x = 0; x < width; x++) {\n      ctx.fillStyle = backgroundColor;\n      ctx.fillRect(x * scale, y * scale, scale, scale);\n    }\n  }\n}\n\nexport function formatPadding(padding: number | number[]): number[] {\n  if (Array.isArray(padding)) {\n    // Build an array of 4 elements and repeat values from padding as necessary to set the value of the array\n    return Array(4)\n      .fill(0)\n      .map((_, index) => padding[index % padding.length]);\n  } else {\n    return [padding, padding, padding, padding];\n  }\n}\n"]}