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Vue实现JSON字符串格式化编辑器组件功能

作者:马可家的菠萝

这篇文章主要介绍了Vue实现JSON字符串格式化编辑器组件,本文通过实例代码给大家介绍的非常详细,对大家的学习或工作具有一定的参考借鉴价值,需要的朋友参考下吧

相信很多同学都用过网上的在线JSON格式化工具来将杂乱的JSON数据转换成易于我们阅读和编辑的格式。那么,你有没有想过自己动手实现一个这样的工具呢?今天,我将介绍如何使用Vue.js来构建一个简单的JSON格式化工具。

功能简述

效果图展示

默认

全屏

功能介绍

按钮

其他

1、自动补全

输入”(“、”{“、”[“将会自动补全另一半

2、自动删除

删除括号时也会自动删除另一半

3、括号匹配

点击括号会高亮另一半括号,方便定位

4、支持ctrl+z撤销和ctrl+y重做功能

5、编辑器根据字符串的换行计算行号并展示

代码

vue文件

<!--JsonEditor.vue-->
<template>
  <div ref="center" id="editor_body" :style="{ height: editorHeight, width: editorWidth }">
    <div style="height: 80%">
      <div class="tool_slider">
        <div style="display: flex; align-items: center">
          <img
            src="@/assets/icons/format.svg"
            class="icon_hover"
            @click="prettyFormat(viewJsonStr)"
            title="格式化"
          />
          <div style="height: 18px; border: 1px solid #858585; margin: 0 3px"></div>
          <img
            src="@/assets/icons/clearLine.svg"
            class="icon_hover"
            @click="viewJsonStr = viewJsonStr.replace(/\s+/g, '')"
            title="去除空格"
          />
          <div
            style="
              display: flex;
              align-items: center;
              border-left: 2px solid #858585;
              height: 18px;
              margin: 0 3px;
              padding: 0 3px;
            "
          >
            <img
              src="@/assets/icons/full.svg"
              v-if="!isFullScreen"
              class="icon_hover"
              @click="fullScreen"
              title="全屏"
            />
            <img
              src="@/assets/icons/closeFull.svg"
              v-else
              class="icon_hover"
              @click="fullScreen"
              title="退出"
            />
          </div>
        </div>
        <div style="display: flex; align-items: center">
          <img
            src="@/assets/icons/success.svg"
            title="格式正确"
            v-if="isPass"
            style="height: 20px; width: 20px"
          />
          <img
            src="@/assets/icons/error.svg"
            title="格式错误"
            v-else
            style="height: 17px; width: 17px"
          />
        </div>
      </div>
      <div class="edit-container">
        <textarea
          wrap="off"
          cols="1"
          id="leftNum"
          disabled
          onscroll="document.getElementById('rightNum').scrollTop = this.scrollTop;"
        ></textarea>
        <textarea
          ref="myTextarea"
          id="rightNum"
          :key="isFullScreen"
          style="width: 100%"
          placeholder="请输入JSON字符串"
          onscroll="document.getElementById('leftNum').scrollTop = this.scrollTop;"
          :value="viewJsonStr"
          @click="handleClick"
          @input="handleTextareaInput1"
        />
      </div>
    </div>
    <div id="console">{{ jsonObj }}</div>
  </div>
</template>
<script lang="ts" setup>
  import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue';
  import { cloneDeep } from 'lodash-es';
  import {
    handleBackspace,
    handleClick,
    handleClickEnter,
    handleTabKey,
    handleTextareaInput,
    setAutoKey,
  } from '@/components/JsonEditor';
  const emit = defineEmits(['update:value']);
  const props = defineProps({
    value: {
      type: String,
      default: '',
    },
    width: {
      type: String,
      default: '1000px',
    },
    height: {
      type: String,
      default: '400px',
    },
  });
  const viewJsonStr: any = ref(props.value);
  const editorWidth: any = ref(JSON.parse(JSON.stringify(props.width)));
  const editorHeight: any = ref(JSON.parse(JSON.stringify(props.height)));
  // 自动补全
  function handleTextareaInput1(event) {
    handleTextareaInput(viewJsonStr, event);
  }
  const isPass = ref(true);
  watch(
    () => viewJsonStr.value,
    (newValue) => {
      calculateNum(newValue);
      emit('update:value', newValue);
    },
  );
  const num = ref('');
  function calculateNum(value) {
    let lineBbj: any = document.getElementById('leftNum');
    num.value = '';
    let str = value;
    if (str === null || str === undefined) {
      str = '';
    }
    str = str.replace(/\r/gi, '');
    str = str.split('\n');
    let n = str.length;
    if (n.toString().length > 3) {
      lineBbj.style.width = n.toString().length * 10 + 'px';
    } else {
      lineBbj.style.width = '30px';
    }
    for (let i = 1; i <= n; i++) {
      if (document.all) {
        num.value += i + '\r\n'; //判断浏览器是否是IE
      } else {
        num.value += i + '\n';
      }
    }
    lineBbj.value = num.value;
  }
  // 预览对象
  const jsonObj = computed(() => {
    const str = cloneDeep(viewJsonStr.value);
    // 如果输入的全是数字,JSON.parse(str)不会报错,需要手动处理一下
    const onlyNumber = /^\d+$/.test(str);
    const dom = document.getElementById('console');
    function setColor(color) {
      if (dom) {
        dom.style.color = color;
      }
    }
    if (str) {
      try {
        if (onlyNumber) {
          setColor('red');
          isPass.value = false;
          return getCurrentTime() + str + ' is not valid JSON';
        }
        setColor('black');
        isPass.value = true;
        if (JSON.parse(str)) {
          setColor('green');
          return `${getCurrentTime()}校验通过`;
        }
      } catch (e: any) {
        isPass.value = false;
        setColor('red');
        if (e.message?.match(/position\s+(\d+)/)) {
          const location = e.message?.match(/position\s+(\d+)/)[1];
          const str1 = str.substring(0, location).trim();
          const str2 = str1.split('\n');
          const message = e.message.substring(0, e.message.indexOf('position'));
          // 如果当前行或者前一行有'['
          if (str2[str2.length - 1]?.includes('[')) {
            const { line, column } = getLineAndColumn(str1, str1.length - 1);
            return `${message} at line ${line},column ${column}`;
          }
          const { line, column } = getLineAndColumn(str, location);
          return `${getCurrentTime()}${message} at line ${line},column ${column}`;
        } else {
          return getCurrentTime() + str + ' is not valid JSON';
        }
      }
    } else {
      return null;
    }
  });
  // 获取当前时间
  function getCurrentTime() {
    let now = new Date(); // 获取当前日期和时间
    let hours = now.getHours(); // 获取小时
    let minutes: string | number = now.getMinutes(); // 获取分钟
    let seconds: string | number = now.getSeconds(); // 获取秒
    let period = hours >= 12 ? '下午' : '上午'; // 判断是上午还是下午
    // 将小时转换为12小时制
    hours = hours % 12 || 12;
    // 格式化分钟和秒,确保它们是两位数
    minutes = minutes < 10 ? '0' + minutes : minutes;
    seconds = seconds < 10 ? '0' + seconds : seconds;
    // 构造最终的时间字符串
    let currentTime = period + hours + ':' + minutes + ':' + seconds;
    return '【' + currentTime + '】 ';
  }
  //计算错误信息所在行列
  function getLineAndColumn(str, index) {
    let line = 1;
    let column = 1;
    for (let i = 0; i < index; i++) {
      if (str[i] === '\n') {
        line++;
        column = 1;
      } else {
        column++;
      }
    }
    return { line, column };
  }
  //json格式美化
  function prettyFormat(str) {
    try {
      // 设置缩进为2个空格
      str = JSON.stringify(JSON.parse(str), null, 4);
      str = str.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>');
      viewJsonStr.value = str.replace(
        /("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g,
        function (match) {
          return match;
        },
      );
    } catch (e) {
      console.log('异常信息:' + e);
    }
  }
  const center = ref();
  const isFullScreen = ref(false);
  // 添加或删除全屏属性
  function fullScreen() {
    if (center.value) {
      if (center.value.className.includes('fullScreen')) {
        editorHeight.value = JSON.parse(JSON.stringify(props.height));
        editorWidth.value = JSON.parse(JSON.stringify(props.width));
        center.value.className = center.value.className.replace(' fullScreen', '');
        isFullScreen.value = false;
      } else {
        editorHeight.value = '100vh';
        editorWidth.value = '100vw';
        center.value.className += ' fullScreen';
        isFullScreen.value = true;
      }
    }
  }
  const myTextarea: any = ref(null);
  function handleKeyDown(event) {
    if (myTextarea.value) {
      if (event.key === 'Backspace') {
        handleBackspace(viewJsonStr, event);
      } else if (event.key === 'Enter') {
        handleClickEnter(viewJsonStr, event);
      } else if (event.key === 'Tab') {
        handleTabKey(event);
      } else if (event.key === 'Escape') {
        if (isFullScreen.value) {
          fullScreen();
        }
      }
    }
  }
  // 符号自动补全以及选中文本后输入符号自动包裹
  function getMouseCheck(event) {
    setAutoKey(viewJsonStr, event);
  }
  onMounted(() => {
    window.addEventListener('keydown', handleKeyDown);
    document.addEventListener('keydown', getMouseCheck);
    calculateNum(props.value);
  });
  onBeforeUnmount(() => {
    window.removeEventListener('keydown', handleKeyDown);
    document.removeEventListener('keydown', getMouseCheck);
  });
</script>
<style scoped lang="less">
  #editor_body {
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    padding: 5px;
    box-sizing: border-box;
  }
  .tool_slider {
    padding-left: 5px;
    padding-right: 5px;
    display: flex;
    width: 100%;
    box-sizing: border-box;
    justify-content: space-between;
    align-items: center;
    height: 25px;
    border: 1px solid #d9d9d9;
    border-bottom: 0;
  }
  .icon_hover {
    height: 20px;
    width: 20px;
    cursor: pointer;
    &:hover {
      color: #5c82ff;
    }
  }
  #leftNum {
    overflow: hidden;
    padding: 3px 2px;
    height: 100%;
    width: 30px;
    line-height: 22px;
    font-size: 13px;
    color: rgba(0, 0, 0, 0.25);
    font-weight: bold;
    resize: none;
    text-align: center;
    outline: none;
    border: 0;
    background: #f5f7fa;
    box-sizing: border-box;
    border-right: 1px solid;
    font-family: 微软雅黑;
  }
  #rightNum {
    white-space: nowrap;
    height: 100%;
    padding: 3px;
    line-height: 22px;
    box-sizing: border-box;
    resize: none;
    border: 0;
    font-family: 微软雅黑;
    &::-webkit-scrollbar {
      width: 5px;
      height: 5px;
      background-color: #efeae6;
    }
    &:focus-visible {
      outline: none;
    }
    &:hover {
      border: 0;
    }
    &:focus {
      border: 0;
    }
  }
  .leftBox {
    height: 100%;
    text-align: left;
  }
  .edit-container {
    height: calc(100% - 25px);
    width: 100%;
    box-sizing: border-box;
    border: 1px solid #d9d9d9;
    display: flex;
  }
  .fullScreen {
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background-color: #f5f7fa;
  }
  #console {
    padding: 12px;
    box-sizing: border-box;
    height: calc(20% - 5px);
    margin-top: 5px;
    width: 100%;
    background-color: white;
    border: 1px solid #d9d9d9;
    overflow: auto;
    font-family: 微软雅黑;
    text-align: left;
  }
</style>

配置文件

/*index.ts*/
import { nextTick } from 'vue';
// 获取文本框的值
export const handleTextareaInput = (viewJsonStr, event) => {
  const textarea = event.target;
  const newValue = textarea.value;
  viewJsonStr.value = newValue;
};
// 设置自动补全
export const setAutoKey = (viewJsonStr, event) => {
  const textarea: any = document.getElementById('rightNum');
  if (event.key === "'" || event.key === '"') {
    event.preventDefault(); // 阻止默认行为
    const selectedText = textarea.value.substring(textarea.selectionStart, textarea.selectionEnd);
    const newText = `${event.key}` + selectedText + `${event.key}`;
    const cursorPosition = textarea.selectionStart + 1;
    textarea.value =
      textarea.value.substring(0, textarea.selectionStart) +
      newText +
      textarea.value.substring(textarea.selectionEnd);
    textarea.setSelectionRange(cursorPosition, cursorPosition);
  } else if (event.key === '(') {
    event.preventDefault(); // 阻止默认行为
    const selectedText = textarea.value.substring(textarea.selectionStart, textarea.selectionEnd);
    const newText = '(' + selectedText + ')';
    const cursorPosition = textarea.selectionStart + 1;
    textarea.value =
      textarea.value.substring(0, textarea.selectionStart) +
      newText +
      textarea.value.substring(textarea.selectionEnd);
    textarea.setSelectionRange(cursorPosition, cursorPosition);
  } else if (event.key === '[') {
    event.preventDefault(); // 阻止默认行为
    const selectedText = textarea.value.substring(textarea.selectionStart, textarea.selectionEnd);
    const newText = '[' + selectedText + ']';
    const cursorPosition = textarea.selectionStart + 1;
    textarea.value =
      textarea.value.substring(0, textarea.selectionStart) +
      newText +
      textarea.value.substring(textarea.selectionEnd);
    textarea.setSelectionRange(cursorPosition, cursorPosition);
  } else if (event.key === '{') {
    event.preventDefault(); // 阻止默认行为
    const selectedText = textarea.value.substring(textarea.selectionStart, textarea.selectionEnd);
    const newText = '{' + selectedText + '}';
    const cursorPosition = textarea.selectionStart + 1;
    textarea.value =
      textarea.value.substring(0, textarea.selectionStart) +
      newText +
      textarea.value.substring(textarea.selectionEnd);
    textarea.setSelectionRange(cursorPosition, cursorPosition);
  }
  viewJsonStr.value = textarea.value;
};
/*------------------------------------------------括号高亮------------------------------------------------------------*/
const findOpeningBracketIndex = (text, startIndex, char) => {
  const openingBrackets = {
    ']': '[',
    '}': '{',
    ')': '(',
  };
  let count = 0;
  for (let i = startIndex; i >= 0; i--) {
    if (text.charAt(i) === char) {
      count++;
    } else if (text.charAt(i) === openingBrackets[char]) {
      count--;
      if (count === 0) {
        return i;
      }
    }
  }
  return -1;
};
const findClosingBracketIndex = (text, startIndex, char) => {
  const closingBrackets = {
    '[': ']',
    '{': '}',
    '(': ')',
  };
  let count = 0;
  for (let i = startIndex; i < text.length; i++) {
    if (text.charAt(i) === char) {
      count++;
    } else if (text.charAt(i) === closingBrackets[char]) {
      count--;
      if (count === 0) {
        return i;
      }
    }
  }
  return -1;
};
const isBracket = (char) => {
  return ['[', ']', '{', '}', '(', ')'].includes(char);
};
// 点击括号寻找对应另一半
export const handleClick = (event) => {
  const textarea: any = document.getElementById('rightNum');
  const { selectionStart, selectionEnd, value } = textarea;
  const clickedChar = value.charAt(selectionStart);
  if (isBracket(clickedChar)) {
    const openingBracketIndex = findOpeningBracketIndex(value, selectionStart, clickedChar);
    const closingBracketIndex = findClosingBracketIndex(value, selectionStart, clickedChar);
    if (openingBracketIndex !== -1) {
      textarea.setSelectionRange(openingBracketIndex, openingBracketIndex + 1);
    } else if (closingBracketIndex !== -1) {
      textarea.setSelectionRange(closingBracketIndex, closingBracketIndex + 1);
    }
  }
};
/*键盘事件*/
export function handleClickEnter(viewJsonStr, event) {
  if (event.key == 'Enter') {
    const textarea = event.target;
    const cursorPosition: any = textarea.selectionStart; // 获取光标位置
    const value = textarea.value;
    if (
      (value[cursorPosition - 1] === '{' && value[cursorPosition] == '}') ||
      (value[cursorPosition - 1] === '[' && value[cursorPosition] == ']')
    ) {
      textarea.value = value.slice(0, cursorPosition) + '\n' + value.slice(cursorPosition);
      textarea.setSelectionRange(cursorPosition, cursorPosition);
      viewJsonStr.value = textarea.value;
      // 将光标移动到插入的空格后面
      setTimeout(() => {
        handleTabKey(syntheticEvent);
      }, 30);
    }
  }
}
// 新建tab按键对象
const syntheticEvent = new KeyboardEvent('keydown', {
  key: 'Tab',
});
// 按下tab键时的操作
export const handleTabKey = (event) => {
  const textarea: any = document.getElementById('rightNum');
  const { selectionStart, selectionEnd } = textarea;
  const tabSpaces = '    '; // 4 spaces
  event.preventDefault();
  // 在当前光标位置插入4个空格
  textarea.value =
    textarea.value.substring(0, selectionStart) +
    tabSpaces +
    textarea.value.substring(selectionEnd);
  // 将光标向右移动4个空格
  textarea.selectionStart = selectionStart + tabSpaces.length;
  textarea.selectionEnd = selectionStart + tabSpaces.length;
};
// 按下Backspace按键时
export function handleBackspace(viewJsonStr, event) {
  const textarea = event.target;
  const cursorPosition = textarea.selectionStart;
  const textBeforeCursor = viewJsonStr.value.slice(0, cursorPosition);
  const textAfterCursor = viewJsonStr.value.slice(cursorPosition);
  if (
    (textBeforeCursor.endsWith('"') && textAfterCursor.startsWith('"')) ||
    (textBeforeCursor.endsWith("'") && textAfterCursor.startsWith("'")) ||
    (textBeforeCursor.endsWith('[') && textAfterCursor.startsWith(']')) ||
    (textBeforeCursor.endsWith('{') && textAfterCursor.startsWith('}')) ||
    (textBeforeCursor.endsWith('(') && textAfterCursor.startsWith(')'))
  ) {
    event.preventDefault(); // 阻止默认的删除行为
    viewJsonStr.value = textBeforeCursor.slice(0, -1) + textAfterCursor.slice(1);
    nextTick(() => {
      textarea.selectionStart = cursorPosition - 1;
      textarea.selectionEnd = cursorPosition - 1;
    }).then((r) => {});
  }
}

调用方式

 <JsonEditor  v-model:value="testStr" />
 const testStr = ref('123');

总结

这个JSON编辑器不仅能够让你方便地格式化JSON字符串,还能帮你去掉不必要的空格。而且,它的全屏功能让编辑更加顺畅。最酷的是,它还能实时告诉你格式化的进度,如果遇到问题了,控制台会详细告诉你哪里出错了,这样你就能快速找到问题并解决它。编辑器还能精确地计算行号,这对于查找问题也是很有帮助的。而且,它还有自动补全、自动删除和括号匹配这些贴心的功能,让你的编辑工作变得更加轻松。如果你不小心做错了,也不用担心,因为它支持撤销和重做。希望它能帮助到大家,让我们的工作更加愉快!

到此这篇关于Vue实现JSON字符串格式化编辑器组件的文章就介绍到这了,更多相关Vue JSON字符串格式化编辑器内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

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