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gaia/apps/settings/js/modules/dialog_panel.js

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+define(function(require) {
+  'use strict';
+
+  var Panel = require('modules/panel');
+
+  var DialogPanel = function ctor_dialogPanel(panelOptions) {
+    var panel = Panel(panelOptions);
+
+    var _emptyFunc = function() {};
+    var submitFunction = _emptyFunc;
+    var cancelFunction = _emptyFunc;
+
+    // Because we need to bridge onWrapSubmit & onWrapCancel with panelOptions
+    // together, we have to override panel.init() to make sure we can access
+    // these API here.
+    //
+    // When init() is called, we will automatically make submitFunction &
+    // cancelFunction's reference work and link to onWrapSubmit & onWrapCancel,
+    // in this way, we can call `this.submit()` & `this.cancel()` in
+    // panelOptions.
+    var originalInit = panel.init;
+    panel.init = function(panel, userOptions) {
+      submitFunction = userOptions.onWrapSubmit.bind(userOptions);
+      cancelFunction = userOptions.onWrapCancel.bind(userOptions);
+      return originalInit.apply(panel, arguments);
+    };
+
+    // We have to extend two more functions for it
+    panel.onSubmit = panelOptions.onSubmit || _emptyFunc;
+    panel.onCancel = panelOptions.onCancel || _emptyFunc;
+
+    // Let's rebind the scope on options
+    panel.onSubmit = panel.onSubmit.bind(panelOptions);
+    panel.onCancel = panel.onCancel.bind(panelOptions);
+
+    // Callee can use `this.submit()` to programmatically submit()
+    // this dialog.
+    panelOptions.submit = function() {
+      submitFunction();
+    };
+
+    // Callee can use `this.cancel()` to programmatically cancel()
+    // this dialog.
+    panelOptions.cancel = function() {
+      cancelFunction();
+    };
+
+    return panel;
+  };
+
+  return DialogPanel;
+});