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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_JAVA_GIN_JAVA_BRIDGE_DISPATCHER_H_
#define CONTENT_RENDERER_JAVA_GIN_JAVA_BRIDGE_DISPATCHER_H_
#include <map>
#include <memory>
#include <set>
#include <string>
#include "base/containers/id_map.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/values.h"
#include "components/origin_matcher/origin_matcher.h"
#include "content/common/android/gin_java_bridge_errors.h"
#include "content/common/gin_java_bridge.mojom.h"
#include "content/public/renderer/render_frame_observer.h"
#include "mojo/public/cpp/bindings/pending_associated_receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace content {
class GinJavaBridgeObject;
struct NamedObject {
using ObjectMap = base::IDMap<GinJavaBridgeObject*>;
using ObjectID = ObjectMap::KeyType;
ObjectID object_id;
origin_matcher::OriginMatcher matcher;
};
// This class handles injecting Java objects into the main frame of a
// RenderView. The 'add' and 'remove' messages received from the browser
// process modify the entries in a map of 'pending' objects. These objects are
// bound to the window object of the main frame when that window object is next
// cleared. These objects remain bound until the window object is cleared
// again.
class GinJavaBridgeDispatcher final : public mojom::GinJavaBridge,
public RenderFrameObserver {
public:
// GinJavaBridgeObjects are managed by gin. An object gets destroyed
// when it is no more referenced from JS. As GinJavaBridgeObject reports
// deletion of self to GinJavaBridgeDispatcher, we would not have stale
// pointers here.
using ObjectMap = base::IDMap<GinJavaBridgeObject*>;
using ObjectID = ObjectMap::KeyType;
explicit GinJavaBridgeDispatcher(RenderFrame* render_frame);
GinJavaBridgeDispatcher(const GinJavaBridgeDispatcher&) = delete;
GinJavaBridgeDispatcher& operator=(const GinJavaBridgeDispatcher&) = delete;
~GinJavaBridgeDispatcher() override;
// RenderFrameObserver override:
void DidClearWindowObject() override;
GinJavaBridgeObject* GetObject(ObjectID object_id);
void OnGinJavaBridgeObjectDeleted(GinJavaBridgeObject* object);
void AddNamedObject(const std::string& name,
ObjectID object_id,
const origin_matcher::OriginMatcher& matcher) override;
void RemoveNamedObject(const std::string& name) override;
void SetHost(mojo::PendingRemote<mojom::GinJavaBridgeHost> host) override;
mojom::GinJavaBridgeHost* GetRemoteObjectHost();
private:
// RenderFrameObserver implementation.
void OnDestruct() override;
typedef std::map<std::string, NamedObject> NamedObjectMap;
NamedObjectMap named_objects_;
ObjectMap objects_;
bool inside_did_clear_window_object_ = false;
mojo::Remote<mojom::GinJavaBridgeHost> remote_;
base::WeakPtrFactory<GinJavaBridgeDispatcher> weak_ptr_factory_{this};
};
} // namespace content
#endif // CONTENT_RENDERER_JAVA_GIN_JAVA_BRIDGE_DISPATCHER_H_
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