JAVASCRIPT 27
010_add_platform_class.js Guest on 27th June 2020 01:19:32 PM
  1. #!/usr/bin/env node
  2.  
  3. // Add Platform Class
  4. // v1.0
  5. // Automatically adds the platform class to the body tag
  6. // after the `prepare` command. By placing the platform CSS classes
  7. // directly in the HTML built for the platform, it speeds up
  8. // rendering the correct layout/style for the specific platform
  9. // instead of waiting for the JS to figure out the correct classes.
  10.  
  11. var fs = require('fs');
  12. var path = require('path');
  13.  
  14. var rootdir = process.argv[2];
  15.  
  16. function addPlatformBodyTag(indexPath, platform) {
  17.   // add the platform class to the body tag
  18.   try {
  19.     var platformClass = 'platform-' + platform;
  20.     var cordovaClass = 'platform-cordova platform-webview';
  21.  
  22.     var html = fs.readFileSync(indexPath, 'utf8');
  23.  
  24.     var bodyTag = findBodyTag(html);
  25.     if(!bodyTag) return; // no opening body tag, something's wrong
  26.  
  27.     if(bodyTag.indexOf(platformClass) > -1) return; // already added
  28.  
  29.     var newBodyTag = bodyTag;
  30.  
  31.     var classAttr = findClassAttr(bodyTag);
  32.     if(classAttr) {
  33.       // body tag has existing class attribute, add the classname
  34.       var endingQuote = classAttr.substring(classAttr.length-1);
  35.       var newClassAttr = classAttr.substring(0, classAttr.length-1);
  36.       newClassAttr += ' ' + platformClass + ' ' + cordovaClass + endingQuote;
  37.       newBodyTag = bodyTag.replace(classAttr, newClassAttr);
  38.  
  39.     } else {
  40.       // add class attribute to the body tag
  41.       newBodyTag = bodyTag.replace('>', ' class="' + platformClass + ' ' + cordovaClass + '">');
  42.     }
  43.  
  44.     html = html.replace(bodyTag, newBodyTag);
  45.  
  46.     fs.writeFileSync(indexPath, html, 'utf8');
  47.  
  48.     process.stdout.write('add to body class: ' + platformClass + '\n');
  49.   } catch(e) {
  50.     process.stdout.write(e);
  51.   }
  52. }
  53.  
  54. function findBodyTag(html) {
  55.   // get the body tag
  56.   try{
  57.     return html.match(/<body(?=[\s>])(.*?)>/gi)[0];
  58.   }catch(e){}
  59. }
  60.  
  61. function findClassAttr(bodyTag) {
  62.   // get the body tag's class attribute
  63.   try{
  64.     return bodyTag.match(/ class=["|'](.*?)["|']/gi)[0];
  65.  }catch(e){}
  66. }
  67.  
  68. if (rootdir) {
  69.  
  70.  // go through each of the platform directories that have been prepared
  71.  var platforms = (process.env.CORDOVA_PLATFORMS ? process.env.CORDOVA_PLATFORMS.split(',') : []);
  72.  
  73.  for(var x=0; x<platforms.length; x++) {
  74.    // open up the index.html file at the www root
  75.    try {
  76.      var platform = platforms[x].trim().toLowerCase();
  77.      var indexPath;
  78.  
  79.      if(platform == 'android') {
  80.        indexPath = path.join('platforms', platform, 'assets', 'www', 'index.html');
  81.      } else {
  82.        indexPath = path.join('platforms', platform, 'www', 'index.html');
  83.      }
  84.  
  85.      if(fs.existsSync(indexPath)) {
  86.        addPlatformBodyTag(indexPath, platform);
  87.      }
  88.  
  89.    } catch(e) {
  90.      process.stdout.write(e);
  91.    }
  92.  }
  93.  
  94. }

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