2 files changed, 224 insertions, 0 deletions
diff --git a/content/test/cpp_binding_example.cc b/content/test/cpp_binding_example.cc
new file mode 100644
index 0000000..3c7630d
--- /dev/null
+++ b/content/test/cpp_binding_example.cc
@@ -0,0 +1,138 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/test/cpp_binding_example.h"
+
+#include <stdio.h>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+
+using webkit_glue::CppArgumentList;
+using webkit_glue::CppBoundClass;
+using webkit_glue::CppVariant;
+
+namespace content {
+
+namespace {
+
+class PropertyCallbackExample : public CppBoundClass::PropertyCallback {
+ public:
+  virtual bool GetValue(CppVariant* value) OVERRIDE {
+    value->Set(value_);
+    return true;
+  }
+
+  virtual bool SetValue(const CppVariant& value) OVERRIDE {
+    value_.Set(value);
+    return true;
+  }
+
+ private:
+  CppVariant value_;
+};
+
+}  // namespace
+
+CppBindingExample::CppBindingExample() {
+  // Map properties.  It's recommended, but not required, that the JavaScript
+  // names (used as the keys in this map) match the names of the member
+  // variables exposed through those names.
+  BindProperty("my_value", &my_value);
+  BindProperty("my_other_value", &my_other_value);
+
+  // Bind property with a callback.
+  BindProperty("my_value_with_callback", new PropertyCallbackExample());
+  // Bind property with a getter callback.
+  BindGetterCallback("same", base::Bind(&CppBindingExample::same,
+                                        base::Unretained(this)));
+
+  // Map methods.  See comment above about names.
+  BindCallback("echoValue", base::Bind(&CppBindingExample::echoValue,
+                                       base::Unretained(this)));
+  BindCallback("echoType", base::Bind(&CppBindingExample::echoType,
+                                      base::Unretained(this)));
+  BindCallback("plus", base::Bind(&CppBindingExample::plus,
+                                  base::Unretained(this)));
+
+  // The fallback method is called when a nonexistent method is called on an
+  // object. If none is specified, calling a nonexistent method causes an
+  // exception to be thrown and the JavaScript execution is stopped.
+  BindFallbackCallback(base::Bind(&CppBindingExample::fallbackMethod,
+                                  base::Unretained(this)));
+
+  my_value.Set(10);
+  my_other_value.Set("Reinitialized!");
+}
+
+void CppBindingExample::echoValue(const CppArgumentList& args,
+                                  CppVariant* result) {
+  if (args.size() < 1) {
+    result->SetNull();
+    return;
+  }
+  result->Set(args[0]);
+}
+
+void CppBindingExample::echoType(const CppArgumentList& args,
+                                 CppVariant* result) {
+  if (args.size() < 1) {
+    result->SetNull();
+    return;
+  }
+  // Note that if args[0] is a string, the following assignment implicitly
+  // makes a copy of that string, which may have an undesirable impact on
+  // performance.
+  CppVariant arg1 = args[0];
+  if (arg1.isBool())
+    result->Set(true);
+  else if (arg1.isInt32())
+    result->Set(7);
+  else if (arg1.isDouble())
+    result->Set(3.14159);
+  else if (arg1.isString())
+    result->Set("Success!");
+}
+
+void CppBindingExample::plus(const CppArgumentList& args,
+                             CppVariant* result) {
+  if (args.size() < 2) {
+    result->SetNull();
+    return;
+  }
+
+  CppVariant arg1 = args[0];
+  CppVariant arg2 = args[1];
+
+  if (!arg1.isNumber() || !arg2.isNumber()) {
+    result->SetNull();
+    return;
+  }
+
+  // The value of a CppVariant may be read directly from its NPVariant struct.
+  // (However, it should only be set using one of the Set() functions.)
+  double sum = 0.;
+  if (arg1.isDouble())
+    sum += arg1.value.doubleValue;
+  else if (arg1.isInt32())
+    sum += arg1.value.intValue;
+
+  if (arg2.isDouble())
+    sum += arg2.value.doubleValue;
+  else if (arg2.isInt32())
+    sum += arg2.value.intValue;
+
+  result->Set(sum);
+}
+
+void CppBindingExample::same(CppVariant* result) {
+  result->Set(42);
+}
+
+void CppBindingExample::fallbackMethod(const CppArgumentList& args,
+                                       CppVariant* result) {
+  printf("Error: unknown JavaScript method invoked.\n");
+}
+
+}  // namespace content
diff --git a/content/test/cpp_binding_example.h b/content/test/cpp_binding_example.h
new file mode 100644
index 0000000..f594ae7
--- /dev/null
+++ b/content/test/cpp_binding_example.h
@@ -0,0 +1,86 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_TEST_CPP_BINDING_EXAMPLE_H_
+#define CONTENT_TEST_CPP_BINDING_EXAMPLE_H_
+
+/*
+  CppBindingExample class:
+  This provides an example of how to use the CppBoundClass to create methods
+  and properties that can be exposed to JavaScript by an appropriately built
+  embedding client. It is also used by the CppBoundClass unit test.
+
+  Typically, a class intended to be bound to JavaScript will define a
+  constructor, any methods and properties to be exposed, and optionally a
+  destructor.  An embedding client can then bind the class to a JavaScript
+  object in a frame's window using the CppBoundClass::BindToJavascript() method,
+  generally called from the WebFrameClient's DidClearWindowObject().
+
+  Once this class has been bound, say to the name "example", it might be called
+  from JavaScript in the following way:
+
+  <script>
+    if (window.example) {
+      document.writeln(example.echoValue(false));
+      document.writeln(example.echoType("Hello world!"));
+      document.writeln(example.plus(2, 3.1));
+
+      example.my_value = 15;
+      example.my_other_value = 2.1;
+      document.writeln(example.plus(example.my_value, example.my_other_value));
+    }
+  </script>
+*/
+
+#include "webkit/renderer/cpp_bound_class.h"
+
+namespace content {
+
+class CppBindingExample : public webkit_glue::CppBoundClass {
+ public:
+  // The default constructor initializes the property and method lists needed
+  // to bind this class to a JS object.
+  CppBindingExample();
+
+  //
+  // These public member variables and methods implement the methods and
+  // properties that will be exposed to JavaScript. If needed, the class could
+  // also contain other methods or variables, which will be hidden from JS
+  // as long as they're not mapped in the property and method lists created in
+  // the constructor.
+  //
+  // The signatures of any methods to be bound must match
+  // CppBoundClass::Callback.
+  //
+
+  // Returns the value that was passed in as its first (only) argument.
+  void echoValue(const webkit_glue::CppArgumentList& args,
+                 webkit_glue::CppVariant* result);
+
+  // Returns a hard-coded value of the same type (bool, number (double),
+  // string, or null) that was passed in as an argument.
+  void echoType(const webkit_glue::CppArgumentList& args,
+                webkit_glue::CppVariant* result);
+
+  // Returns the sum of the (first) two arguments as a double, if they are both
+  // numbers (integers or doubles).  Otherwise returns null.
+  void plus(const webkit_glue::CppArgumentList& args,
+            webkit_glue::CppVariant* result);
+
+  // Always returns the same value -- an example of a read-only property.
+  void same(webkit_glue::CppVariant* result);
+
+  // Invoked when a nonexistent method is called on this example object, this
+  // prints an error message.
+  void fallbackMethod(const webkit_glue::CppArgumentList& args,
+                      webkit_glue::CppVariant* result);
+
+  // These properties will also be exposed to JavaScript.
+  webkit_glue::CppVariant my_value;
+  webkit_glue::CppVariant my_other_value;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_TEST_CPP_BINDING_EXAMPLE_H_