Allow chrome.send to pass number, boolean, null and arrays of those

webkit/glue/cpp_variant.cc

 // Copyright (c) 2006-2008 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.
 
 // This file contains definitions for CppVariant.
 
 #include <limits>
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebBindings.h"
 #include "webkit/glue/cpp_variant.h"
 #include "base/logging.h"
@@ skipping 234 matching lines @@
             }
             WebBindings::releaseVariantValue(&index_value);
           }
         }
       }
     }
   }
   return string_vector;
 }
 
+std::vector<CppVariant> CppVariant::ToVector() const {
+    DCHECK(isObject());
+    std::vector<CppVariant> vector;
+    NPObject* np_value = value.objectValue;
+    NPIdentifier length_id = WebBindings::getStringIdentifier("length");
+
+    if (WebBindings::hasProperty(NULL, np_value, length_id)) {
+        NPVariant length_value;
+        if (WebBindings::getProperty(NULL, np_value, length_id, &length_value)) {
+            int length = 0;
+            // The length is a double in some cases.
+            if (NPVARIANT_IS_DOUBLE(length_value))
+                length = static_cast<int>(NPVARIANT_TO_DOUBLE(length_value));
+            else if (NPVARIANT_IS_INT32(length_value))
+                length = NPVARIANT_TO_INT32(length_value);
+            WebBindings::releaseVariantValue(&length_value);
+
+            // For sanity, only allow 60000 items.
+            length = std::min(60000, length);
+            for (int i = 0; i < length; ++i) {
+                // Get each of the items.
+                std::string index = base::StringPrintf("%d", i);
+                NPIdentifier index_id = WebBindings::getStringIdentifier(index.c_str());
+                if (WebBindings::hasProperty(NULL, np_value, index_id)) {
+                    CppVariant index_value;
+                    if (WebBindings::getProperty(NULL, np_value, index_id, &index_value)) {
+                        vector.push_back(index_value);
+                    }
+                    // CppVariant has a destructor which calls releaseVariantValue.
+                }
+            }
+        }
+    }
+    return vector;
+}
+
 bool CppVariant::Invoke(const std::string& method, const CppVariant* args,
                         uint32 arg_count, CppVariant& result) const {
   DCHECK(isObject());
   NPIdentifier method_name = WebBindings::getStringIdentifier(method.c_str());
   NPObject* np_object = value.objectValue;
   if (WebBindings::hasMethod(NULL, np_object, method_name)) {
     NPVariant r;
     bool status = WebBindings::invoke(NULL, np_object, method_name, args, arg_count, &r);
     result.Set(r);
     return status;
   } else {
     return false;
   }
 }