From bd4fd271c134b2cb7f15092fe256a232ea7dfc82 Mon Sep 17 00:00:00 2001
From: sakuya <81883387@qq.com>
Date: Sat, 24 Jul 2021 22:32:41 +0800
Subject: [PATCH] ADD component sc-cropper
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1：增加组件 scCropper
2：scUpload内置scCropper
---
 package.json                       |  7 ++-
 src/components/scCropper/index.vue | 83 +++++++++++++++++++++++++
 src/components/scUpload/index.vue  | 50 +++++++++++++--
 src/views/vab/cropper.vue          | 98 ++++++++++++++++++++++++++++++
 src/views/vab/upload.vue           |  2 +
 5 files changed, 233 insertions(+), 7 deletions(-)
 create mode 100644 src/components/scCropper/index.vue
 create mode 100644 src/views/vab/cropper.vue

diff --git a/package.json b/package.json
index 33b94969..4739ccae 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
 		"@tinymce/tinymce-vue": "4.0.3",
 		"axios": "0.21.1",
 		"core-js": "3.15.2",
+		"cropperjs": "^1.5.12",
 		"crypto-js": "4.0.0",
 		"echarts": "5.1.2",
 		"element-plus": "1.0.2-beta.54",
@@ -27,11 +28,11 @@
 		"@vue/cli-plugin-eslint": "4.5.13",
 		"@vue/cli-service": "4.5.13",
 		"@vue/compiler-sfc": "3.1.4",
-		"less": "3.13.1",
-		"less-loader": "7.3.0",
 		"babel-eslint": "10.1.0",
 		"eslint": "6.8.0",
-		"eslint-plugin-vue": "7.12.1"
+		"eslint-plugin-vue": "7.12.1",
+		"less": "3.13.1",
+		"less-loader": "7.3.0"
 	},
 	"eslintConfig": {
 		"root": true,
diff --git a/src/components/scCropper/index.vue b/src/components/scCropper/index.vue
new file mode 100644
index 00000000..adce7fa6
--- /dev/null
+++ b/src/components/scCropper/index.vue
@@ -0,0 +1,83 @@
+<!--
+ * @Descripttion: 图像裁剪组件
+ * @version: 1.0
+ * @Author: sakuya
+ * @Date: 2021年7月24日17:05:43
+ * @LastEditors:
+ * @LastEditTime:
+ * @other: 代码完全开源，欢迎参考，也欢迎PR
+-->
+
+<template>
+	<div class="sc-cropper">
+		<div class="sc-cropper__img">
+			<img :src="src" ref="img">
+		</div>
+		<div class="sc-cropper__preview">
+			<h4>图像预览</h4>
+			<div class="sc-cropper__preview__img" ref="preview"></div>
+		</div>
+	</div>
+</template>
+
+<script>
+	import Cropper from 'cropperjs'
+	import 'cropperjs/dist/cropper.css'
+
+	export default {
+		props: {
+			src: { type: String, default: "" },
+			compress: {type: Number, default: 1},
+			aspectRatio:  {type: Number, default: NaN},
+		},
+		data() {
+			return {
+				crop: null
+			}
+		},
+		watch:{
+			aspectRatio(val){
+				this.crop.setAspectRatio(val)
+			}
+		},
+		mounted() {
+			this.init()
+		},
+		methods: {
+			init(){
+				this.crop = new Cropper(this.$refs.img, {
+					viewMode: 2,
+					dragMode: 'move',
+					aspectRatio: this.aspectRatio,
+					preview: this.$refs.preview
+				})
+			},
+			setAspectRatio(aspectRatio){
+				this.crop.setAspectRatio(aspectRatio)
+			},
+			getCropData(cb, type='image/jpeg'){
+				cb(this.crop.getCroppedCanvas().toDataURL(type, this.compress))
+			},
+			getCropBlob(cb, type='image/jpeg'){
+				this.crop.getCroppedCanvas().toBlob((blob) => {
+					cb(blob)
+				}, type, this.compress)
+			},
+			getCropFile(cb, fileName='fileName.jpg', type='image/jpeg'){
+				this.crop.getCroppedCanvas().toBlob((blob) => {
+					let file = new File([blob], fileName, {type: type})
+					cb(file)
+				}, type, this.compress)
+			}
+		}
+	}
+</script>
+
+<style scoped>
+	.sc-cropper {height:300px;}
+	.sc-cropper__img {height:100%;width:400px;float: left;background: #EBEEF5;}
+	.sc-cropper__img img {display: none;}
+	.sc-cropper__preview {width: 120px;margin-left: 20px;float: left;}
+	.sc-cropper__preview h4 {font-weight: normal;font-size: 12px;color: #999;margin-bottom: 20px;}
+	.sc-cropper__preview__img {overflow: hidden;width: 120px;height: 120px;border: 1px solid #ebeef5;}
+</style>
diff --git a/src/components/scUpload/index.vue b/src/components/scUpload/index.vue
index c4d36ee4..1791242f 100644
--- a/src/components/scUpload/index.vue
+++ b/src/components/scUpload/index.vue
@@ -8,7 +8,7 @@
 			<a v-else :href="img" class="file" target="_blank"><i class="el-icon-document"></i></a>
 		</div>
 		<div v-else class="sc-upload-uploader">
-			<el-upload ref="upload" class="uploader" :accept="accept" :action="action" :show-file-list="false" :before-upload="before" :on-success="success" :on-error="error" :http-request="request">
+			<el-upload ref="upload" class="uploader" :auto-upload="!cropper" :on-change="change" :accept="accept" :action="action" :show-file-list="false" :before-upload="before" :on-success="success" :on-error="error" :http-request="request">
 				<slot>
 					<div class="file-empty">
 						<i :class="icon"></i>
@@ -17,12 +17,21 @@
 				</slot>
 			</el-upload>
 		</div>
+		<el-dialog title="剪裁" v-model="cropperDialogVisible" :width="580" destroy-on-close>
+			<sc-cropper :src="cropperImg" :compress="compress" :aspectRatio="aspectRatio" ref="cropper"></sc-cropper>
+			<template #footer>
+				<el-button @click="cropperDialogVisible=false" >取 消</el-button>
+				<el-button type="primary" @click="cropperSave">确 定</el-button>
+			</template>
+		</el-dialog>
 		<el-input v-model="img" style="display:none"></el-input>
 	</div>
 </template>
 
 <script>
-	import config from "@/config/upload";
+	import config from "@/config/upload"
+	import scCropper from '@/components/scCropper';
+
 
 	export default {
 		props: {
@@ -35,8 +44,14 @@
 			maxSize: { type: Number, default: config.maxSize },
 			title: { type: String, default: "" },
 			icon: { type: String, default: "el-icon-plus" },
+			cropper: { type: Boolean, default: false },
+			compress: {type: Number, default: 1},
+			aspectRatio:  {type: Number, default: NaN},
 			onSuccess: { type: Function, default: () => { return true } }
 		},
+		components: {
+			scCropper
+		},
 		data() {
 			return {
 				loading: false,
@@ -46,7 +61,10 @@
 				style: {
 					width: this.width + "px",
 					height: this.height + "px"
-				}
+				},
+				cropperDialogVisible: false,
+				cropperImg: "",
+				cropperUploadFile: null
 			}
 		},
 		watch:{
@@ -63,6 +81,14 @@
 			this.img = this.modelValue;
 		},
 		methods: {
+			cropperSave(){
+				var uploadFile = this.$refs.upload.uploadFiles[0].raw
+				this.$refs.cropper.getCropFile(file => {
+					this.cropperUploadFile = file
+					this.$refs.upload.submit()
+				}, uploadFile.name, uploadFile.type)
+				this.cropperDialogVisible = false
+			},
 			isImg(fileUrl){
 				var strRegex = "(.jpg|.png|.gif|.jpeg)$";
 				var re = new RegExp(strRegex);
@@ -72,7 +98,22 @@
 					this.fileIsImg=false;
 				}
 			},
+			change(file){
+				if(this.cropper && file.status=='ready'){
+					this.isImg(file.name)
+					if(!this.fileIsImg){
+						this.$notify.warning({
+							title: '上传文件警告',
+							message: '选择的文件非图像类文件'
+						})
+						return false
+					}
+					this.cropperDialogVisible = true
+					this.cropperImg = URL.createObjectURL(file.raw)
+				}
+			},
 			before(file){
+				file = this.cropper ? this.cropperUploadFile : file
 				const maxSize = file.size / 1024 / 1024 < this.maxSize;
 				if (!maxSize) {
 					this.$message.warning(`上传文件大小不能超过 ${this.maxSize}MB!`);
@@ -114,7 +155,8 @@
 					apiObj = this.apiObj;
 				}
 				const data = new FormData();
-				data.append("file", param.file);
+				var file = this.cropper ? this.cropperUploadFile : param.file
+				data.append("file", file);
 				apiObj.post(data).then(res => {
 					param.onSuccess(res)
 				}).catch(err => {
diff --git a/src/views/vab/cropper.vue b/src/views/vab/cropper.vue
new file mode 100644
index 00000000..91d994f2
--- /dev/null
+++ b/src/views/vab/cropper.vue
@@ -0,0 +1,98 @@
+<!--
+ * @Descripttion: 图像剪裁组件演示文件
+ * @version: 1.0
+ * @Author: sakuya
+ * @Date: 2021年7月24日20:58:51
+ * @LastEditors:
+ * @LastEditTime:
+-->
+
+<template>
+	<el-main>
+		<el-row :gutter="15">
+			<el-col :lg="14">
+				<el-card shadow="never">
+					<sc-cropper :src="cropperImg" :compress="compress" :aspectRatio="aspectRatio" ref="cropper"></sc-cropper>
+				</el-card>
+				<el-card shadow="never" header="参数和方法">
+					<el-form label-width="100px">
+						<el-form-item label="aspectRatio">
+						    <el-select v-model="aspectRatio" placeholder="请选择">
+								<el-option label="自由" :value="0"></el-option>
+								<el-option label="1:1" :value="1/1"></el-option>
+								<el-option label="4:3" :value="4/3"></el-option>
+								<el-option label="16:9" :value="16/9"></el-option>
+							</el-select>
+							<div class="el-form-item-msg">固定选区或者不固定</div>
+						</el-form-item>
+						<el-form-item label="compress">
+						    <el-select v-model="compress" placeholder="请选择">
+								<el-option label="0.1" :value="0.1"></el-option>
+								<el-option label="0.5" :value="0.5"></el-option>
+								<el-option label="1" :value="1"></el-option>
+							</el-select>
+							<div class="el-form-item-msg">图像压缩率，值为：0.1-1</div>
+						</el-form-item>
+					</el-form>
+					<el-button type="primary" plain @click="getBase64">Base64</el-button>
+					<el-button type="primary" plain @click="getBlob">Blob</el-button>
+					<el-button type="primary" plain @click="getFile">File</el-button>
+				</el-card>
+				<el-card shadow="never" header="方法结果">
+					<img :src="imgData" />
+				</el-card>
+			</el-col>
+			<el-col :lg="10">
+				<el-card shadow="never" header="已内置剪裁的上传组件">
+					<el-alert title="设置cropper就可以开启上传前剪裁, 并已封装compress和aspectRatio, 打开F12查看网络请求" type="success" style="margin-bottom:20px;"></el-alert>
+					<sc-upload v-model="uploadImg" title="开启剪裁" :cropper="true" :compress="1" :aspectRatio="1/1"></sc-upload>
+				</el-card>
+			</el-col>
+		</el-row>
+	</el-main>
+
+
+</template>
+
+<script>
+	import scCropper from '@/components/scCropper'
+
+	export default {
+		name: 'cropper',
+		components: {
+			scCropper
+		},
+		data() {
+			return {
+				cropperImg: 'img/avatar.jpg',
+				compress: 0.5,
+				aspectRatio: 0,
+				uploadImg: '',
+				imgData: ''
+			}
+		},
+		methods: {
+			getBase64(){
+				this.$refs.cropper.getCropData(data=>{
+					this.imgData = data
+				})
+			},
+			getBlob(){
+				this.$refs.cropper.getCropBlob(blob=>{
+					this.imgData = URL.createObjectURL(blob)
+				})
+			},
+			getFile(){
+				this.$refs.cropper.getCropFile(file=>{
+					let aTag = document.createElement('a')
+					aTag.download = file.name;
+					aTag.href = URL.createObjectURL(file)
+					aTag.click()
+				}, 'fileName.jpg', 'image/jpeg')
+			}
+		}
+	}
+</script>
+
+<style>
+</style>
diff --git a/src/views/vab/upload.vue b/src/views/vab/upload.vue
index 401773e1..18efbdbc 100644
--- a/src/views/vab/upload.vue
+++ b/src/views/vab/upload.vue
@@ -10,6 +10,7 @@
 					<p>自定义插槽</p>
 				</div>
 			</sc-upload>
+			<sc-upload v-model="imgurl4" title="开启剪裁" :cropper="true" :compress="1" :aspectRatio="1/1"></sc-upload>
 		</el-card>
 
 		<el-card shadow="never" header="在验证表单中使用">
@@ -51,6 +52,7 @@
 				imgurl: "img/avatar.jpg",
 				imgurl2: "",
 				imgurl3: "",
+				imgurl4: "",
 				form: {
 					img1: "",
 					img2: "",