lib/dblib.js

   1 class dblib
   2 {
   3         static center(elem)
   4         {
   5                 elem.style.left = elem.parentNode.clientWidth / 2 - parseInt(elem.clientWidth) / 2 + "px";
   6         }
   7
   8         static centerVertical(elem)
   9         {
  10                 let parent = elem.parentNode;
  11                 if (parent == document.body)
  12                         parent = document.documentElement;
  13                 elem.style.top = parent.clientHeight / 2 - parseInt(elem.clientHeight) / 2 + "px";
  14         }
  15
  16         static random(min, max)
  17         {
  18                 return Math.floor(min + Math.random() * (max - min + 1));
  19         }
  20
  21         static humanFormat(str)
  22         {
  23                 str = str.replace("_", " ");
  24                 str = str[0].toUpperCase() + str.slice(1, str.length);
  25                 return str;
  26         }
  27
  28         static copy(dst, src, condition)
  29         {
  30                 for (let key in src){
  31                         let value = src[key];
  32
  33                         if (condition && ! condition(key, value)) {
  34                                 console.log(key, value);
  35                                 continue;
  36                         }
  37
  38                         if (value instanceof Array)
  39                                 this.copy(dst[key] = [], value, condition);
  40                         else if (value instanceof Function)
  41                                 dst[key] = value;
  42                         else if (value instanceof Object)
  43                                 this.copy(dst[key] = {}, value, condition);
  44                         else
  45                                 dst[key] = value;
  46                 }
  47
  48                 return dst;
  49         }
  50
  51         static copySimple(dst, src)
  52         {
  53                 for (let key in src)
  54                         dst[key] = src[key];
  55
  56                 return dst;
  57         }
  58
  59         static htmlEntities(str)
  60         {
  61                 return str
  62                         .replace(/&/g, '&amp;')
  63                         .replace(/</g, '&lt;')
  64                         .replace(/>/g, '&gt;')
  65                         .replace(/"/g, '&quot;')
  66                         .replace(/\n/g, "<br>")
  67                         .replace(/\t/g, "&emsp;&emsp;")
  68                         .replace(/ /g, "&ensp;");
  69         }
  70
  71         static removeTmp(src)
  72         {
  73                 let dst = {};
  74
  75                 if (src instanceof Array)
  76                         dst = [];
  77
  78                 return dblib.copy(dst, src, key => key != "tmp");;
  79         }
  80
  81         static replaceRecursive(src, search, replace)
  82         {
  83                 let dst = {};
  84
  85                 if (src instanceof Array)
  86                         dst = [];
  87
  88                 dblib.copySimple(dst, src);
  89
  90                 for (let key in dst) {
  91                         let value = dst[key];
  92
  93                         if (value === search)
  94                                 value = replace;
  95                         else if (value instanceof Object)
  96                                 value = this.replaceRecursive(value, search, replace);
  97
  98                         dst[key] = value;
  99                 }
 100
 101                 return dst;
 102         }
 103 }