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gaia/apps/settings/js/modules/settings_utils.js

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+/*
+ * SettingsUtils is a singleton that we will provide all needed methods
+ * when doing panel related actions.
+ *
+ * @module SettingsUtils
+ */
+define(function(require) {
+  'use strict';
+
+  // TODO
+  // We need to move utils.js to SettingsUtils step by step
+  var LazyLoader = require('shared/lazy_loader');
+
+  var SettingsUtils = {
+    /**
+     * We will use LazyLoader to help us load settings' used templates
+     * and then return the html to callback
+     *
+     * @memberOf SettingsUtils
+     * @param {String} panelId - ID of target panel
+     * @param {Function} callback - with html as its first parameter
+     */
+    loadTemplate: function su_loadTemplate(panelId, callback) {
+      var templateElement = document.getElementById(panelId);
+      if (!templateElement) {
+        callback(null);
+      } else {
+        LazyLoader.load([templateElement], function() {
+          callback(templateElement.innerHTML);
+        });
+      }
+    },
+
+    /**
+     * Re-runs the font-fit title
+     * centering logic.
+     *
+     * The gaia-header has mutation observers
+     * that listen for changes in the header
+     * title and re-run the font-fit logic.
+     *
+     * If buttons around the title are shown/hidden
+     * then these mutation observers won't be
+     * triggered, but we want the font-fit logic
+     * to be re-run.
+     *
+     * This is a deficiency of <gaia-header>. If
+     * anyone knows a way to listen for changes
+     * in visibility, we won't need this anymore.
+     *
+     * @param {GaiaHeader} header
+     * @private
+     */
+    runHeaderFontFit: function su_runHeaderFontFit(header) {
+      var titles = header.querySelectorAll('h1');
+      [].forEach.call(titles, function(title) {
+        title.textContent = title.textContent;
+      });
+    }
+  };
+
+  return SettingsUtils;
+});