DevTools: consolidate protocol generators for front-end, backend and type builder.

third_party/WebKit/Source/platform/inspector_protocol/DispatcherBase.h

+// Copyright 2016 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 DispatcherBase_h
+#define DispatcherBase_h
+
+#include "platform/PlatformExport.h"
+#include "platform/inspector_protocol/BackendCallback.h"
+#include "platform/inspector_protocol/Collections.h"
+#include "platform/inspector_protocol/ErrorSupport.h"
+#include "platform/inspector_protocol/String16.h"
+#include "platform/inspector_protocol/Values.h"
+
+namespace blink {
+namespace protocol {
+
+class FrontendChannel;
+class WeakPtr;
+
+class PLATFORM_EXPORT DispatcherBase {
+public:
+    class WeakPtr {
+    public:
+        explicit WeakPtr(DispatcherBase*);
+        ~WeakPtr();
+        DispatcherBase* get() { return m_dispatcher; }
+        void dispose() { m_dispatcher = nullptr; }
+
+    private:
+        DispatcherBase* m_dispatcher;
+    };
+
+    class PLATFORM_EXPORT Callback : public protocol::BackendCallback {
+    public:
+        Callback(std::unique_ptr<WeakPtr> backendImpl, int callId);
+        virtual ~Callback();
+        void dispose();
+
+    protected:
+        void sendIfActive(std::unique_ptr<protocol::DictionaryValue> partialMessage, const ErrorString& invocationError);
+
+    private:
+        std::unique_ptr<WeakPtr> m_backendImpl;
+        int m_callId;
+    };
+
+    explicit DispatcherBase(FrontendChannel*);
+    virtual ~DispatcherBase();
+
+    enum CommonErrorCode {
+        ParseError = -32700,
+        InvalidRequest = -32600,
+        MethodNotFound = -32601,
+        InvalidParams = -32602,
+        InternalError = -32603,
+        ServerError = -32000,
+    };
+
+    static bool getCommandName(const String16& message, String16* result);
+
+    virtual void dispatch(int callId, const String16& method, std::unique_ptr<protocol::DictionaryValue> messageObject) = 0;
+
+    void sendResponse(int callId, const ErrorString&, ErrorSupport*, std::unique_ptr<protocol::DictionaryValue> result);
+    void sendResponse(int callId, const ErrorString&, std::unique_ptr<protocol::DictionaryValue> result);
+    void sendResponse(int callId, const ErrorString&);
+
+    void reportProtocolError(int callId, CommonErrorCode, const String16& errorMessage, ErrorSupport* errors);
+    void clearFrontend();
+
+    std::unique_ptr<WeakPtr> weakPtr();
+
+private:
+    FrontendChannel* m_frontendChannel;
+    protocol::HashSet<WeakPtr*> m_weakPtrs;
+};
+
+class PLATFORM_EXPORT UberDispatcher {
+public:
+    explicit UberDispatcher(FrontendChannel*);
+    void registerBackend(const String16& name, std::unique_ptr<protocol::DispatcherBase>);
+    void dispatch(const String16& message);
+    FrontendChannel* channel() { return m_frontendChannel; }
+    virtual ~UberDispatcher();
+
+private:
+    FrontendChannel* m_frontendChannel;
+    protocol::HashMap<String16, std::unique_ptr<protocol::DispatcherBase>> m_dispatchers;
+};
+
+} // namespace platform
+} // namespace blink
+
+#endif // !defined(DispatcherBase_h)