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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This file contains the definition for CppBindingExample, a usage example
// that is not actually used anywhere. See cpp_binding_example.h.
#include "cpp_binding_example.h"
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);
// Map methods. See comment above about names.
BindMethod("echoValue", &CppBindingExample::echoValue);
BindMethod("echoType", &CppBindingExample::echoType);
BindMethod("plus", &CppBindingExample::plus);
// 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.
BindFallbackMethod(&CppBindingExample::fallbackMethod);
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::fallbackMethod(const CppArgumentList& args,
CppVariant* result) {
printf("Error: unknown JavaScript method invoked.\n");
}
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