tav-ui/es/packages/hooks/web/useWatermark2.mjs.map

Tav UI

{"version":3,"file":"useWatermark2.mjs","sources":["../../../../../../packages/hooks/web/useWatermark.ts"],"sourcesContent":["import { getCurrentInstance, onBeforeUnmount, ref, shallowRef, unref } from 'vue'\nimport { useRafThrottle } from '@tav-ui/utils/domUtils'\nimport { addResizeListener, removeResizeListener } from '@tav-ui/utils/event'\nimport { isDef } from '@tav-ui/utils/is'\nimport type { Ref } from 'vue'\n\nconst domSymbol = Symbol('watermark-dom')\nconst DEFAULT_FILL_STYLE = 'rgba(0, 0, 0, 0.1)'\nconst DEFAULT_WATER_MARKER_SIZE = {\n  width: 300,\n  height: 240,\n}\n\nexport function useWatermark({\n  appendEl = ref(document.body) as Ref<HTMLElement | null>,\n  color = DEFAULT_FILL_STYLE,\n  size = DEFAULT_WATER_MARKER_SIZE,\n}) {\n  const id = domSymbol.toString()\n  const watermarkEl = shallowRef<HTMLElement>()\n\n  const func = useRafThrottle(() => {\n    const el = unref(appendEl)\n    if (!el) return\n    const { clientHeight: height, clientWidth: width } = el\n    updateWatermark({ height, width })\n  })\n\n  const clear = () => {\n    const domId = unref(watermarkEl)\n    watermarkEl.value = undefined\n    const el = unref(appendEl)\n    if (!el) return\n    domId && el.removeChild(domId)\n    removeResizeListener(el, func)\n  }\n\n  function createBase64(str: string) {\n    const can = document.createElement('canvas')\n    // const height = 160;\n    const { width, height } = size\n    Object.assign(can, { width, height })\n\n    const cans = can.getContext('2d')\n    if (cans) {\n      cans.rotate((-20 * Math.PI) / 120)\n      cans.font = '15px Vedana'\n      cans.fillStyle = color || 'rgba(0, 0, 0, 0.1)'\n      cans.textAlign = 'left'\n      cans.textBaseline = 'middle'\n      cans.fillText(str, width / 20, height)\n    }\n    return can.toDataURL('image/png')\n  }\n\n  function updateWatermark(\n    options: {\n      width?: number\n      height?: number\n      str?: string\n    } = {}\n  ) {\n    const el = unref(watermarkEl)\n    if (!el) return\n    if (isDef(options.width)) {\n      // el.style.width = `${options.width}px`;\n      el.style.width = `100%`\n    }\n    if (isDef(options.height)) {\n      // el.style.height = `${options.height}px`;\n      el.style.height = `100%`\n    }\n    if (isDef(options.str)) {\n      el.style.background = `url(${createBase64(options.str)}) left top repeat`\n    }\n  }\n\n  const createWatermark = (str: string) => {\n    if (unref(watermarkEl)) {\n      updateWatermark({ str })\n      return id\n    }\n    const div = document.createElement('div')\n    watermarkEl.value = div\n    div.id = id\n    div.style.pointerEvents = 'none'\n    div.style.top = '0px'\n    div.style.left = '0px'\n    div.style.position = 'absolute'\n    div.style.zIndex = '100000'\n    // div.style.zIndex = \"10\";\n    const el = unref(appendEl)\n    if (!el) return id\n    const { clientHeight: height, clientWidth: width } = el\n    updateWatermark({ str, width, height })\n    el.appendChild(div)\n    return id\n  }\n\n  function setWatermark(str: string) {\n    createWatermark(str)\n    addResizeListener(document.documentElement, func)\n    const instance = getCurrentInstance()\n    if (instance) {\n      onBeforeUnmount(() => {\n        clear()\n      })\n    }\n  }\n\n  return { setWatermark, clear 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