From 0895b61ccbac13e04bf6b3dfd8162518f1eb250b Mon Sep 17 00:00:00 2001
From: chenjiajian <770230504@qq.com>
Date: Wed, 29 Mar 2023 19:31:02 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=8C=E6=88=90=E5=9B=BE=E7=89=87=E9=A2=84?=
 =?UTF-8?q?=E8=A7=88=E7=BB=84=E4=BB=B6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/icon/svg.js      |  15 ++-
 src/image/preview.js | 266 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 280 insertions(+), 1 deletion(-)
 create mode 100644 src/image/preview.js

diff --git a/src/icon/svg.js b/src/icon/svg.js
index bb45ddc..ff0d112 100644
--- a/src/icon/svg.js
+++ b/src/icon/svg.js
@@ -155,7 +155,20 @@ const SVG_PATH = {
   wallet:
     'M384.5 682.6V341.4c0-47 39.4-85.4 88.5-85.4h408.1v-42.6c0-47-39.2-85.4-87.6-85.4H155.2c-49.1 0-91.2 37-91.2 84v600c0 47 42.1 84 91.2 84h638.1c48.7 0 87.6-38.4 87.6-85.4V768H472.7c-48.9 0-88.2-38.4-88.2-85.4zM448 355.7v312.6c0 19.6 16.8 35.7 37.4 35.7h437.2c20.6 0 37.4-16.1 37.4-35.7V355.7c0-19.6-16.8-35.7-37.4-35.7H485.4c-20.6 0-37.4 16.1-37.4 35.7z m195.9 227.4c-43 2.7-78.4-32.8-75.8-75.8 2.2-35.4 31-64.2 66.6-66.7 43-2.7 78.4 32.8 75.8 75.8-2.5 35.7-31.2 64.5-66.6 66.7z',
   windows:
-    'M431.2 491.5H64V187.3l367.2-50.6v354.8z m0 395.8L64 836.7V536.8h367.2v350.5zM960 491.5H471.6V131.3L960 64v427.5z m0 468.5l-488.4-67.3V536.8H960V960z'
+    'M431.2 491.5H64V187.3l367.2-50.6v354.8z m0 395.8L64 836.7V536.8h367.2v350.5zM960 491.5H471.6V131.3L960 64v427.5z m0 468.5l-488.4-67.3V536.8H960V960z',
+  zoomOut:
+    'm795.904 750.72 124.992 124.928a32 32 0 0 1-45.248 45.248L750.656 795.904a416 416 0 1 1 45.248-45.248zM480 832a352 352 0 1 0 0-704 352 352 0 0 0 0 704zM352 448h256a32 32 0 0 1 0 64H352a32 32 0 0 1 0-64z',
+  zoomIn:
+    'm795.904 750.72 124.992 124.928a32 32 0 0 1-45.248 45.248L750.656 795.904a416 416 0 1 1 45.248-45.248zM480 832a352 352 0 1 0 0-704 352 352 0 0 0 0 704zm-32-384v-96a32 32 0 0 1 64 0v96h96a32 32 0 0 1 0 64h-96v96a32 32 0 0 1-64 0v-96h-96a32 32 0 0 1 0-64h96z',
+
+  refreshRight:
+    'M784.512 230.272v-50.56a32 32 0 1 1 64 0v149.056a32 32 0 0 1-32 32H667.52a32 32 0 1 1 0-64h92.992A320 320 0 1 0 524.8 833.152a320 320 0 0 0 320-320h64a384 384 0 0 1-384 384 384 384 0 0 1-384-384 384 384 0 0 1 643.712-282.88z',
+  refreshLeft:
+    'M289.088 296.704h92.992a32 32 0 0 1 0 64H232.96a32 32 0 0 1-32-32V179.712a32 32 0 0 1 64 0v50.56a384 384 0 0 1 643.84 282.88 384 384 0 0 1-383.936 384 384 384 0 0 1-384-384h64a320 320 0 1 0 640 0 320 320 0 0 0-555.712-216.448z',
+  fullScreen:
+    'm160 96.064 192 .192a32 32 0 0 1 0 64l-192-.192V352a32 32 0 0 1-64 0V96h64v.064zm0 831.872V928H96V672a32 32 0 1 1 64 0v191.936l192-.192a32 32 0 1 1 0 64l-192 .192zM864 96.064V96h64v256a32 32 0 1 1-64 0V160.064l-192 .192a32 32 0 1 1 0-64l192-.192zm0 831.872-192-.192a32 32 0 0 1 0-64l192 .192V672a32 32 0 1 1 64 0v256h-64v-.064z',
+  scaleToOriginal:
+    'M813.176 180.706a60.235 60.235 0 0 1 60.236 60.235v481.883a60.235 60.235 0 0 1-60.236 60.235H210.824a60.235 60.235 0 0 1-60.236-60.235V240.94a60.235 60.235 0 0 1 60.236-60.235h602.352zm0-60.235H210.824A120.47 120.47 0 0 0 90.353 240.94v481.883a120.47 120.47 0 0 0 120.47 120.47h602.353a120.47 120.47 0 0 0 120.471-120.47V240.94a120.47 120.47 0 0 0-120.47-120.47zm-120.47 180.705a30.118 30.118 0 0 0-30.118 30.118v301.177a30.118 30.118 0 0 0 60.236 0V331.294a30.118 30.118 0 0 0-30.118-30.118zm-361.412 0a30.118 30.118 0 0 0-30.118 30.118v301.177a30.118 30.118 0 1 0 60.236 0V331.294a30.118 30.118 0 0 0-30.118-30.118zM512 361.412a30.118 30.118 0 0 0-30.118 30.117v30.118a30.118 30.118 0 0 0 60.236 0V391.53A30.118 30.118 0 0 0 512 361.412zM512 512a30.118 30.118 0 0 0-30.118 30.118v30.117a30.118 30.118 0 0 0 60.236 0v-30.117A30.118 30.118 0 0 0 512 512z'
 }
 
 export default SVG_PATH
diff --git a/src/image/preview.js b/src/image/preview.js
new file mode 100644
index 0000000..9489c06
--- /dev/null
+++ b/src/image/preview.js
@@ -0,0 +1,266 @@
+/**
+ * {图片预览组件}
+ * @author chensbox<chensbox@foxmail.com>
+ * @date 2023/03/06 15:17:25
+ */
+
+import { css, html, Component, styleMap, bind, unbind } from '@bd/core'
+import '../icon/index.js'
+class ImagePreview extends Component {
+  static props = {
+    list: {
+      type: Array,
+      default: [],
+      attribute: false
+    },
+    visible: false,
+    maxZoom: 3,
+    minZoom: 1 / 3
+  }
+  active = 0
+  static styles = css`
+    :host {
+      z-index: 1000;
+      position: fixed;
+      display: none;
+      width: 100%;
+      height: 100%;
+      top: 0;
+      left: 0;
+      background: rgba(0, 0, 0, 0.5);
+    }
+    :host([visible]) {
+      display: block;
+    }
+    .wrapper {
+      display: flex;
+      justify-content: center;
+      align-items: center;
+      width: 100%;
+      height: 100%;
+    }
+    img {
+      user-select: none;
+      max-height: 100%;
+      max-width: 100%;
+      &.show {
+        display: block;
+      }
+      &.hide {
+        display: none;
+      }
+    }
+    .toggle-btn {
+      user-select: none;
+      z-index: 100;
+      cursor: pointer;
+      position: absolute;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      opacity: 0.8;
+      width: 44px;
+      height: 44px;
+      font-size: 24px;
+      color: #fff;
+      background-color: #606266;
+      border-color: #fff;
+      border-radius: 50%;
+      --size: 22px;
+    }
+    .left,
+    .right {
+      top: 50%;
+      transform: translateY(-50%);
+    }
+    .left {
+      left: 5%;
+    }
+    .right {
+      right: 5%;
+    }
+    .close {
+      top: 5%;
+      right: 5%;
+    }
+    .tools-bar {
+      display: flex;
+      align-items: center;
+      justify-content: space-around;
+      position: absolute;
+      bottom: 30px;
+      left: 50%;
+      width: 282px;
+      height: 44px;
+      padding: 0 23px;
+      background-color: #606266;
+      border-color: #fff;
+      color: #e5e5e5;
+      border-radius: 22px;
+      transform: translateX(-50%);
+      --size: 22px;
+      wc-icon {
+        cursor: pointer;
+      }
+    }
+  `
+  pre() {
+    this.toggleImage(this.active - 1)
+  }
+  next() {
+    this.toggleImage(this.active + 1)
+  }
+  toggleImage(index) {
+    this.active = index
+    if (this.active < 0) {
+      this.active = this.list.length - 1
+    }
+    if (this.active > this.list.length - 1) {
+      this.active = 0
+    }
+    this.resetState()
+  }
+  zoomIn() {
+    this.#state.duration = 0.2
+    this.setZoom(this.#state.scale * 1.2)
+  }
+  zoomOut() {
+    this.#state.duration = 0.2
+    this.setZoom(this.#state.scale / 1.2)
+  }
+  setZoom(val) {
+    const { maxZoom, minZoom } = this
+    val = Math.max(val, minZoom)
+    val = Math.min(val, maxZoom)
+    val = val.toFixed(2)
+    this.#state.scale = val
+    this.$requestUpdate()
+  }
+  resetState() {
+    this.#setState({
+      scale: 1,
+      rotate: 0,
+      duration: 0,
+      x: 0,
+      y: 0
+    })
+    this.$refs.resetBtn.name =
+      this.$refs.resetBtn.name === 'fullScreen'
+        ? 'scaleToOriginal'
+        : 'fullScreen'
+    this.$requestUpdate()
+  }
+  rotateLeft() {
+    this.setRotate(this.#state.rotate - 90)
+  }
+  rotateRight() {
+    this.setRotate(this.#state.rotate + 90)
+  }
+  setRotate(val) {
+    this.#setState({
+      duration: 0.2,
+      rotate: val
+    })
+  }
+
+  close() {
+    this.visible = false
+  }
+  #state = {
+    scale: 1,
+    rotate: 0,
+    duration: 0.2,
+    x: 0,
+    y: 0
+  }
+  #setState(data) {
+    Object.assign(this.#state, data)
+    this.$requestUpdate()
+  }
+  mounted() {
+    this.$on('wheel', e => {
+      e.preventDefault()
+      let { scale } = this.#state
+      this.#setState({
+        duration: 0
+      })
+      scale = e.wheelDelta > 0 ? +scale + 0.08 : scale - 0.08
+      this.setZoom(scale)
+    })
+
+    bind(this.$refs.images, 'mousedown', e => {
+      let { clientX: startX, clientY: startY } = e
+      let { x, y } = this.#state
+      const onmousemove = bind(document, 'mousemove', e => {
+        e.preventDefault()
+        let { clientX, clientY } = e
+        let deltaX = clientX - startX
+        let deltaY = clientY - startY
+
+        this.#setState({
+          x: deltaX + x,
+          y: deltaY + y
+        })
+      })
+      const onmouseup = bind(document, 'mouseup', _ => {
+        unbind(document, 'mousemove', onmousemove)
+        unbind(document, 'mouseup', onmouseup)
+      })
+    })
+  }
+  render() {
+    let { scale, rotate, duration, x, y } = this.#state
+    let styles = styleMap({
+      transform: `scale(${scale}) rotate(${rotate}deg) `,
+      transition: `transform ${duration}s ease-in-out`
+    })
+    let translate = styleMap({
+      transform: `translate(${x}px, ${y}px)`
+    })
+    return html`
+      <div class="wrapper">
+        <div class="left toggle-btn" @click=${this.pre}>
+          <wc-icon name="left"></wc-icon>
+        </div>
+        <div class="right toggle-btn" @click=${this.next}>
+          <wc-icon name="right"></wc-icon>
+        </div>
+        <div class="close toggle-btn" @click=${this.close}>
+          <wc-icon name="close"></wc-icon>
+        </div>
+        <div class="images" ref="images" style=${translate}>
+          ${this.list.map(
+            (url, index) =>
+              html`<img
+                class="img"
+                loading="auto"
+                style=${index === this.active ? styles : ''}
+                class=${index === this.active ? 'show' : 'hide'}
+                src=${url}
+              />`
+          )}
+        </div>
+        <div class="tools-bar">
+          <wc-icon name="zoomIn" @click=${this.zoomIn}></wc-icon>
+          <wc-icon name="zoomOut" @click=${this.zoomOut}></wc-icon>
+          <wc-icon
+            name="fullScreen"
+            ref="resetBtn"
+            @click=${this.resetState}
+          ></wc-icon>
+          <wc-icon name="refreshLeft" @click=${this.rotateLeft}></wc-icon>
+          <wc-icon name="refreshRight" @click=${this.rotateRight}></wc-icon>
+        </div>
+      </div>
+    `
+  }
+}
+ImagePreview.reg('image-preview')
+const instance = new ImagePreview()
+document.body.appendChild(instance)
+
+window.imagePreview = function (list) {
+  instance.list = list
+  instance.visible = true
+  return instance
+}