Implement a proxy for URL util. Some of the implementation that doesn't need ...

ppapi/shared_impl/url_util_impl.h

+// Copyright (c) 2011 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 PPAPI_SHARED_IMPL_URL_UTIL_IMPL_H_
+#define PPAPI_SHARED_IMPL_URL_UTIL_IMPL_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "googleurl/src/url_parse.h"
+#include "ppapi/c/dev/ppb_url_util_dev.h"
+#include "ppapi/c/pp_module.h"
+#include "ppapi/c/pp_var.h"
+
+class GURL;
+
+namespace pp {
+namespace shared_impl {
+
+// Contains the implementation of PPB_URLUtil that is shared between the proxy
+// and the renderer.
+class URLUtilImpl {
+ public:
+  // The functions here would normally take the var interface for constructing
+  // return strings. However, at the current time there's some mixup between
+  // using Var and VarDeprecated. To resolve this, we instead pass the pointer
+  // to the string creation function so can be used independently of this.
+  typedef PP_Var (*VarFromUtf8)(PP_Module, const char*, uint32_t);
+
+  // Function that converts the given var to a std::string or NULL if the
+  // var is not a string or is invalid.
+  //
+  // We could use PPB_Var for this, but that interface requires an additional
+  // string conversion. Both the proxy and the host side maintain the strings
+  // in a std::string, and the form we want for passing to GURL is also a
+  // std::string. Parameterizing this separately saves this, and also solves
+  // the same problem that VarFromUtf8 does.
+  typedef const std::string* (*StringFromVar)(PP_Var var);
+
+  // PPB_URLUtil shared functions.
+  static PP_Var Canonicalize(StringFromVar string_from_var,
+                             VarFromUtf8 var_from_utf8,
+                             PP_Module pp_module,
+                             PP_Var url,
+                             PP_URLComponents_Dev* components);
+  static PP_Var ResolveRelativeToURL(StringFromVar string_from_var,
+                                     VarFromUtf8 var_from_utf8,
+                                     PP_Module pp_module,
+                                     PP_Var base_url,
+                                     PP_Var relative,
+                                     PP_URLComponents_Dev* components);
+  static PP_Bool IsSameSecurityOrigin(StringFromVar string_from_var,
+                                      PP_Var url_a, PP_Var url_b);
+
+  // Used for returning the given GURL from a PPAPI function, with an optional
+  // out param indicating the components.
+  static PP_Var GenerateURLReturn(VarFromUtf8 var_from_utf8,
+                                  PP_Module pp_module,
+                                  const GURL& url,
+                                  PP_URLComponents_Dev* components);
+};
+
+}  // namespace shared_impl
+}  // namespace pp
+
+#endif