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1 /*
2  * Copyright (C) 2011 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #ifndef InspectorBaseAgent_h
32 #define InspectorBaseAgent_h
33 
34 #include "InspectorBackendDispatcher.h"
35 #include "wtf/Forward.h"
36 #include "wtf/Vector.h"
37 #include "wtf/text/WTFString.h"
38 
39 namespace WebCore {
40 
41 class InspectorFrontend;
42 class InspectorCompositeState;
43 class InspectorState;
44 class InstrumentingAgents;
45 
46 class InspectorBaseAgentInterface {
47 public:
48     InspectorBaseAgentInterface(const String&, InstrumentingAgents*, InspectorCompositeState*);
49     virtual ~InspectorBaseAgentInterface();
50 
setFrontend(InspectorFrontend *)51     virtual void setFrontend(InspectorFrontend*) { }
clearFrontend()52     virtual void clearFrontend() { }
restore()53     virtual void restore() { }
54     virtual void registerInDispatcher(InspectorBackendDispatcher*) = 0;
discardAgent()55     virtual void discardAgent() { }
56 
name()57     String name() { return m_name; }
58 
59 protected:
60     InstrumentingAgents* m_instrumentingAgents;
61     InspectorState* m_state;
62 
63 private:
64     String m_name;
65 };
66 
67 class InspectorAgentRegistry {
68 public:
69     void append(PassOwnPtr<InspectorBaseAgentInterface>);
70 
71     void setFrontend(InspectorFrontend*);
72     void clearFrontend();
73     void restore();
74     void registerInDispatcher(InspectorBackendDispatcher*);
75     void discardAgents();
76 
77 private:
78     Vector<OwnPtr<InspectorBaseAgentInterface> > m_agents;
79 };
80 
81 template<typename T>
82 class InspectorBaseAgent : public InspectorBaseAgentInterface {
83 public:
~InspectorBaseAgent()84     virtual ~InspectorBaseAgent() { }
85 
registerInDispatcher(InspectorBackendDispatcher * dispatcher)86     virtual void registerInDispatcher(InspectorBackendDispatcher* dispatcher)
87     {
88         dispatcher->registerAgent(static_cast<T*>(this));
89     }
90 
91 protected:
InspectorBaseAgent(const String & name,InstrumentingAgents * instrumentingAgents,InspectorCompositeState * inspectorState)92     InspectorBaseAgent(const String& name, InstrumentingAgents* instrumentingAgents, InspectorCompositeState* inspectorState)
93         : InspectorBaseAgentInterface(name, instrumentingAgents, inspectorState)
94     {
95     }
96 };
97 
98 } // namespace WebCore
99 
100 #endif // !defined(InspectorBaseAgent_h)
101