blob: 8c7e65859150188457e6970a5566aee3e30ab567 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
// Copyright (c) 2012 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 CHROME_RENDERER_EXTENSIONS_OBJECT_BACKED_NATIVE_HANDLER_H_
#define CHROME_RENDERER_EXTENSIONS_OBJECT_BACKED_NATIVE_HANDLER_H_
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/memory/linked_ptr.h"
#include "chrome/renderer/extensions/native_handler.h"
#include "v8/include/v8.h"
namespace extensions {
// An ObjectBackedNativeHandler is a factory for JS objects with functions on
// them that map to native C++ functions. Subclasses should call RouteFunction()
// in their constructor to define functions on the created JS objects.
class ObjectBackedNativeHandler : public NativeHandler {
public:
explicit ObjectBackedNativeHandler(v8::Handle<v8::Context> context);
virtual ~ObjectBackedNativeHandler();
// Create an object with bindings to the native functions defined through
// RouteFunction().
virtual v8::Handle<v8::Object> NewInstance() OVERRIDE;
protected:
typedef v8::Handle<v8::Value> (*HandlerFunc)(const v8::Arguments&);
typedef base::Callback<v8::Handle<v8::Value>(const v8::Arguments&)>
HandlerFunction;
// Installs a new 'route' from |name| to |handler_function|. This means that
// NewInstance()s of this ObjectBackedNativeHandler will have a property
// |name| which will be handled by |handler_function|.
void RouteFunction(const std::string& name,
const HandlerFunction& handler_function);
void RouteStaticFunction(const std::string& name,
const HandlerFunc handler_func);
// Invalidate this object so it cannot be used any more. This is needed
// because it's possible for this to outlive |v8_context_|. Invalidate must
// be called before this happens.
//
// Subclasses may override to invalidate their own V8 state, but always
// call superclass eventually.
//
// This must be idempotent. Returns true if it was the first time this was
// called, false otherwise.
virtual bool Invalidate();
v8::Handle<v8::Context> v8_context() { return v8_context_; }
private:
static v8::Handle<v8::Value> Router(const v8::Arguments& args);
std::vector<linked_ptr<HandlerFunction> > handler_functions_;
v8::Handle<v8::Context> v8_context_;
v8::Persistent<v8::ObjectTemplate> object_template_;
bool is_valid_;
DISALLOW_COPY_AND_ASSIGN(ObjectBackedNativeHandler);
};
} // extensions
#endif // CHROME_RENDERER_EXTENSIONS_OBJECT_BACKED_NATIVE_HANDLER_H_
|
