<template>
<div>
    <div class="editor" ref="editor" :style="styles"></div>
    <input type="file" @change="change" id="upload" style="display:none;" />
</div>
</template>

<script>
import { upload } from "@/api/tools.js";  //上传接口
import Quill from "quill";
import "quill/dist/quill.core.css";
import "quill/dist/quill.snow.css";
import "quill/dist/quill.bubble.css";
import { ImageDrop } from 'quill-image-drop-module' // 图片拖动组件引用
import ImageResize from 'quill-image-resize-module' // 图片缩放组件引用
Quill.register('modules/imageDrop', ImageDrop) // 注册
Quill.register('modules/imageResize', ImageResize) // 注册
const Size = Quill.import('attributors/style/size')
  Size.whitelist = ['15px', '18px']
  Quill.register(Size, true);
const Parchment = Quill.import("parchment");
class lineHeightAttributor extends Parchment.Attributor.Style { }
const lineHeightStyle = new lineHeightAttributor("lineHeight", "line-height", {
  scope: Parchment.Scope.INLINE,
  whitelist: ["1", "1.5", "2", "3", "4"]
});
const toolbarOptions = [
    ["bold", "italic", "underline", "strike"],       // 加粗 斜体 下划线 删除线
    ["blockquote", "code-block"],                    // 引用  代码块
    [{ list: "ordered" }, { list: "bullet" }],       // 有序、无序列表
    [{ indent: "-1" }, { indent: "+1" }],            // 缩进
    [{ size: [false,"18px"] }],   // 字体大小
    [{ header: [1, 2, 3, 4, 5, 6, false] }],         // 标题
    [{ color: [] }, { background: [] }],             // 字体颜色、字体背景颜色
    [{ align: [] }],                                 // 对齐方式
    [{ lineheight: ['initial', '1', '1.5', '2', '3', '4'] }],
    ["clean"],                                       // 清除文本格式
    ["link", "image"]
  ]
Quill.register({ 'formats/lineHeight': lineHeightStyle }, true)
export default {
  name: "Editor",
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: "",
    },
    toobar:{
      type: Boolean,
      default: true
    },
    placeholder: {
      type: String,
      default: "请输入长度大于100个字符的内容",
    },
    /* 高度 */
    height: {
      type: Number,
      default: null,
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: null,
    },
  },
  data() {
    return {
      QuillObj: null,
      currentValue: "",
      options: {
        theme: "snow",
        bounds: document.body,
        debug: "warn",
        modules: {
          imageDrop: true,      //图片拖拽
          imageResize: {          //放大缩小
            displayStyles: {
              backgroundColor: "black",
              border: "none",
              color: "white"
            },
            modules: ["Resize", "DisplaySize", "Toolbar"]
          },
          // 工具栏配置
          toolbar: {
            container:this.toobar? toolbarOptions:[],
            handlers: {
              image: function(value) {
                if (value) {
                  document.querySelector('#upload').click()  // 劫持原来的图片点击按钮事件
                } else {
                  this.QuillObj.format('image', false)
                }
              },
              lineheight: (value) => {
                if (value) {
                  this.QuillObj.format("lineHeight", value)
                }
              }
            }
          }
        },
        placeholder: this.placeholder,
        readOnly: false,
      },
    };
  },
  computed: {
    styles() {
      let style = {};
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`;
      }
      if (this.height) {
        style.height = `${this.height}px`;
      }
      return style;
    },
  },
  watch: {
    value: {
      handler(val) {
        if (val !== this.currentValue) {
          this.currentValue = val === null ? "" : val;
          if (this.QuillObj) {
            this.QuillObj.pasteHTML(this.currentValue);
          }
        }
      },
      immediate: true,
    },
  },
  mounted() {
    this.init();
  },
  beforeDestroy() {
    this.QuillObj = null;
  },
  methods: {
    init() {
      const editor = this.$refs.editor;
      this.QuillObj = new Quill(editor, this.options);
      this.QuillObj.pasteHTML(this.currentValue);
      this.QuillObj.on("text-change", (delta, oldDelta, source) => {
        const html = this.$refs.editor.children[0].innerHTML;
        const text = this.QuillObj.getText();
        const quill = this.QuillObj;
        this.currentValue = html;
        this.$emit("input", html);
        this.$emit("on-change", { html, text, quill });
      });
      this.QuillObj.on("text-change", (delta, oldDelta, source) => {
        this.$emit("on-text-change", delta, oldDelta, source);
      });
      this.QuillObj.on("selection-change", (range, oldRange, source) => {
        this.$emit("on-selection-change", range, oldRange, source);
      });
      this.QuillObj.on("editor-change", (eventName, ...args) => {
        this.$emit("on-editor-change", eventName, ...args);
      });
    },
    change(e) {
      let file = e.target.files[0]
      const formData = new FormData()
      console.log(file,'file');
      formData.append('file', file)
      upload(formData)
        .then(res => {
          if (res.status === 200) {
            // const formdata = _.extend({}, this.formdata)
            let length = this.QuillObj.getSelection().index//光标位置
            // 插入图片  图片地址
            this.QuillObj.insertEmbed(length, 'image', res.result.httpPath)
            // 调整光标到最后
            this.QuillObj.setSelection(length + 1)//光标后移一位
          }
        })
        .catch(err => {
          console.error(err)
        })
    },
  },
};
</script>

<style>
 .editor{
 min-height: 250px !important;
} 
.ql-editor{
  min-height: 250px !important;
} 
.ql-container{
  font-size: 15px;
}
.editor, .ql-toolbar {
  white-space: pre-wrap!important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}

.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}

.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "15px";
}

.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="15px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="15px"]::before {
  content:"15px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="18px"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="18px"]::before {
  content: "18px";
}


.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}

.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}

.ql-snow .ql-picker.ql-lineheight .ql-picker-label::before {
  content: '行高';
  font-size: 12px;
  width: 80px;
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item[data-value="1"]::before {
  content: '1';
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label[data-value="1.5"]::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item[data-value='1.5']::before {
  content: '1.5';
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item[data-value='2']::before {
  content: '2';
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item[data-value='3']::before {
  content: '3';
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item[data-value='4']::before {
  content: '4';
}


</style>
