miaoguo_master/pages/main/latex.js

import common from '../../utils/util';
import main from '../../utils/main';

const app = getApp();
var keyHeight=0;
var isCloseKeyboard=1;
var tempCursor = undefined;
var btnName="";
var isEdit = true;

Page({
  data: {
    ImagePath: app.globalData.uploadImageUrl,
    InputHeight1: 157,
    InputHeight2: 157,
    BtnArray:[
      {Name:"分数",Content:"\\frac{a}{b} ",FontSize:"24"},
      {Name:"平方根",Content:"\\sqrt{a} ",FontSize:"24"},
      {Name:"换行",Content:"\\\\",FontSize:"24"},
      {Name:"空格",Content:"\\, ",FontSize:"24"},
      {Name:"等距空格",Content:"\\quad ",FontSize:"24"},
      {Name:"∵",Content:"∵",FontSize:"36"},
      {Name:"∴",Content:"∴",FontSize:"36"},
      {Name:"∠",Content:"∠",FontSize:"36"},
      {Name:"∥",Content:"∥",FontSize:"36"},
      {Name:"⟂",Content:"⟂",FontSize:"36"},
      {Name:"▵",Content:"▵",FontSize:"36"},
      {Name:"▱",Content:"▱",FontSize:"36"},
      {Name:"⊙",Content:"⊙",FontSize:"36"},
      {Name:"∼",Content:"∼",FontSize:"36"},
      {Name:"≅",Content:"≅",FontSize:"36"},
      {Name:"×",Content:"×",FontSize:"36"},
      {Name:"÷",Content:"÷",FontSize:"36"},
      {Name:"·",Content:"\\cdot",FontSize:"36"},
      {Name:"±",Content:"±",FontSize:"36"},
      {Name:"≠",Content:"≠",FontSize:"36"},
      {Name:"≥",Content:"≥",FontSize:"36"},
      {Name:"≤",Content:"≤",FontSize:"36"},
      {Name:"π",Content:"π",FontSize:"36"},
      {Name:"°",Content:"°",FontSize:"36"},
      {Name:"⇒",Content:"⇒",FontSize:"36"},
      {Name:"⇔",Content:"⇔",FontSize:"36"},
      {Name:"+∞",Content:"+∞",FontSize:"36"},
      {Name:"²",Content:"²",FontSize:"36"},
      {Name:"³",Content:"³",FontSize:"36"},
      {Name:"N次方",Content:"x^{n} ",FontSize:"24"},
      {Name:"N次方根",Content:"\\sqrt[n]{a} ",FontSize:"24"},
      {Name:"x₁",Content:"x₁",FontSize:"36"},
      {Name:"x₂",Content:"x₂",FontSize:"36"},
      {Name:"下标n",Content:"x_{n} ",FontSize:"24"},
      {Name:"α",Content:"α",FontSize:"36"},
      {Name:"β",Content:"β",FontSize:"36"},
      {Name:"γ",Content:"γ",FontSize:"36"},
      {Name:"θ",Content:"θ",FontSize:"36"},
      {Name:"圆弧AB",Content:"\\widehat{AB}",FontSize:"24"},
      {Name:"向量a",Content:"\\overrightarrow{a}",FontSize:"24"},
    ],
  },
  onLoad: function (options) {
    var that = this;
    that.setData({
      Containnerheight: main.getWindowHeight(),
      Focus: true,
    });
    that.clear();
  },
  onShow:function(e){
    var that = this;
    var obj=app.globalData.Latex;
    if (obj){
      that.setData({
        KeyContent: obj.Content,
        LatexContent:"$$"+obj.Content+"$$",
        LatexName:obj.Name,
        FontSize:obj.FontSize,
      });
      obj=null;
    }

    if (app.globalData.IsIPhoneX) {
      that.setData({
        InputHeight1: 240,
        InputHeight2: 240,
      });
    }
  },
  //字段输入
  bindinputField: function (e) {
    var that = this;
    if (app.globalData.IsAndroid && !isEdit) {
      return;
    }
    var value=e.detail.value;
    value=value.replace("｝","}");
    value=value.replace("｛","{");
    that.setData({
      KeyContent: value,
      LatexContent:"$$"+value+"$$",
    });
  },
  setLatex:function(e){
    console.log("setLatex");
    var that=this;
    isEdit = true;
    var value=e.currentTarget.dataset.value;
    btnName=value;
    
    if (!that.data.Focus) {
      var obj = {
        detail: {
          cursor: tempCursor
        }
      };
      that.onBindblur(obj);
    }
    
    setTimeout(function () {
      that.setData({
        Focus: true,
      });
    }, 300);
  },
  
  //焦点聚焦
  onBindFocus: function () {
    //console.log("onBindFocus");
    btnName = "";
    this.setData({
      Focus: true,
    });
  },
  //失焦
  onBindblur: function (e) {
    //console.log("onBindblur:" + isEdit + " Filed:" + this.data.KeyContent);
    
    var that = this;
    //debugger;
    if (app.globalData.IsAndroid && !isEdit) {
      setTimeout(function () {
        isEdit = true;
        //console.log("onBindblur2:" + isEdit);
      }, 500);
      return;
    }
    isEdit = false;
    if (app.globalData.IsAndroid && !isEdit) {
      setTimeout(function () {
        isEdit = true;
        //console.log("onBindblur2:" + isEdit);
      }, 500);
    }

    //console.log("onBindblur:"+isEdit);

    tempCursor = e.detail.cursor;
    if (tempCursor == undefined)
      tempCursor = this.data["KeyContent"].length;
    var str1 = "",
      str2 = "";
    if (this.data.KeyContent.length > 0) {
      str1 = this.data.KeyContent.substr(0, tempCursor);
      str2 = this.data.KeyContent.substring(tempCursor, this.data.KeyContent.length);
    }
    var cur = 0;
    if (btnName) {
      cur = btnName.length;
    }
    
    that.data.KeyContent = str1 + btnName + str2;
    that.setData({
      KeyContent: that.data.KeyContent,
      LatexContent:"$$"+that.data.KeyContent+"$$",
      Focus: false,
      Cursor: tempCursor + cur,
    });
    btnName="";
  },
  bindscrollHandler: function () {
    //console.log("bindscrollHandler");
    btnName = "";
  },
  onLatexError(e){
    var that = this;
    //console.log(e);
  },
  clear:function(){
    var that = this;
    that.setData({
      KeyContent:"",
      LatexContent:"",
      Focus: true,
      Cursor: 0,
    });
    btnName="";
  },
  close: function (e) {
    var that=this;
    var value=e.currentTarget.dataset.value;
    if (value==1){
      app.globalData.Latex="\n[公式";
      if (that.data.LatexName)
        app.globalData.Latex+=" N=\""+that.data.LatexName+"\"";
      if (that.data.FontSize)
        app.globalData.Latex+=" FS=\""+that.data.FontSize+"\"";
      app.globalData.Latex+="]"+that.data.KeyContent+"[/公式]\n";
    }
    else
      app.globalData.Latex="";
    wx.navigateBack({
      delta: 1,
    });
  },
  goto: function (e) {
    var url = e.currentTarget.dataset.url;
    wx.navigateTo({
      url: url,
    });
  },
  onShareAppMessage: function () {
    return {
      title: app.globalData.ShareTitle,
      path: app.globalData.SharePath + '?UserID=' + app.globalData.userInfo.UserID,
      imageUrl: app.globalData.ShareImage,
    }
  },
})