Rendering: Have phantomjs wait a bit before rendering to give fonts a change to load (#22623)

tools/phantomjs/render.js

 (function() {
-    'use strict';
+  'use strict';
 
-    var page = require('webpage').create();
-    var args = require('system').args;
-    var params = {};
-    var regexp = /^([^=]+)=([^$]+)/;
+  var page = require('webpage').create();
+  var args = require('system').args;
+  var params = {};
+  var regexp = /^([^=]+)=([^$]+)/;
 
-    args.forEach(function(arg) {
-      var parts = arg.match(regexp);
-      if (!parts) { return; }
-      params[parts[1]] = parts[2];
-    });
+  args.forEach(function(arg) {
+    var parts = arg.match(regexp);
+    if (!parts) {
+      return;
+    }
+    params[parts[1]] = parts[2];
+  });
 
-    var usage = "url=<url> png=<filename> width=<width> height=<height> renderKey=<key>";
+  var usage = 'url=<url> png=<filename> width=<width> height=<height> renderKey=<key>';
 
-    if (!params.url || !params.png ||  !params.renderKey || !params.domain) {
-      console.log(usage);
-      phantom.exit();
-    }
+  if (!params.url || !params.png || !params.renderKey || !params.domain) {
+    console.log(usage);
+    phantom.exit();
+  }
 
-    phantom.addCookie({
-      'name': 'renderKey',
-      'value': params.renderKey,
-      'domain': params.domain,
-    });
+  phantom.addCookie({
+    name: 'renderKey',
+    value: params.renderKey,
+    domain: params.domain,
+  });
 
-    page.viewportSize = {
-      width: params.width || '800',
-      height: params.height || '400'
-    };
+  page.viewportSize = {
+    width: params.width || '800',
+    height: params.height || '400',
+  };
+
+  var timeoutMs = (parseInt(params.timeout) || 10) * 1000;
+  var waitBetweenReadyCheckMs = 50;
+  var totalWaitMs = 0;
 
-    var timeoutMs = (parseInt(params.timeout) || 10) * 1000;
-    var waitBetweenReadyCheckMs = 50;
-    var totalWaitMs = 0;
+  page.open(params.url, function(status) {
+    console.log('Loading a web page: ' + params.url + ' status: ' + status, timeoutMs);
 
-    page.open(params.url, function (status) {
-      console.log('Loading a web page: ' + params.url + ' status: ' + status, timeoutMs);
+    page.onError = function(msg, trace) {
+      var msgStack = ['ERROR: ' + msg];
+      if (trace && trace.length) {
+        msgStack.push('TRACE:');
+        trace.forEach(function(t) {
+          msgStack.push(' -> ' + t.file + ': ' + t.line + (t.function ? ' (in function "' + t.function + '")' : ''));
+        });
+      }
+      console.error(msgStack.join('\n'));
+    };
 
-      page.onError = function(msg, trace) {
-        var msgStack = ['ERROR: ' + msg];
-        if (trace && trace.length) {
-          msgStack.push('TRACE:');
-          trace.forEach(function(t) {
-            msgStack.push(' -> ' + t.file + ': ' + t.line + (t.function ? ' (in function "' + t.function +'")' : ''));
-          });
-        }
-        console.error(msgStack.join('\n'));
-      };
+    function checkIsReady() {
+      var panelsRendered = page.evaluate(function() {
+        var panelCount = document.querySelectorAll('plugin-component').length;
+        return window.panelsRendered >= panelCount;
+      });
 
-      function checkIsReady() {
-        var panelsRendered = page.evaluate(function() {
-          var panelCount = document.querySelectorAll('plugin-component').length;
-          return window.panelsRendered >= panelCount;
+      if (panelsRendered || totalWaitMs > timeoutMs) {
+        var bb = page.evaluate(function() {
+          var container = document.getElementsByClassName('dashboard-container');
+          if (container.length == 0) {
+            container = document.getElementsByClassName('panel-container');
+          }
+          return container[0].getBoundingClientRect();
         });
 
-        if (panelsRendered || totalWaitMs > timeoutMs) {
-          var bb = page.evaluate(function () {
-            var container = document.getElementsByClassName("dashboard-container")
-            if (container.length == 0) {
-               container = document.getElementsByClassName("panel-container")
-            }
-            return container[0].getBoundingClientRect();
-          });
-          
-          // reset viewport to render full page
-          page.viewportSize = {
-            width: bb.width,
-            height: bb.height
-          };
+        // reset viewport to render full page
+        page.viewportSize = {
+          width: bb.width,
+          height: bb.height,
+        };
 
+        setTimeout(function() {
           page.render(params.png);
           phantom.exit();
-        } else {
-          totalWaitMs += waitBetweenReadyCheckMs;
-          setTimeout(checkIsReady, waitBetweenReadyCheckMs);
-        }
+        }, 5);
+      } else {
+        totalWaitMs += waitBetweenReadyCheckMs;
+        setTimeout(checkIsReady, waitBetweenReadyCheckMs);
       }
+    }
 
-      setTimeout(checkIsReady, waitBetweenReadyCheckMs);
-    });
-  })();
+    setTimeout(checkIsReady, waitBetweenReadyCheckMs);
+  });
+})();