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// 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 CONTENT_BROWSER_WORKER_HOST_WORKER_DOCUMENT_SET_H_
#define CONTENT_BROWSER_WORKER_HOST_WORKER_DOCUMENT_SET_H_
#include <set>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
namespace content {
class WorkerMessageFilter;
// The WorkerDocumentSet tracks all of the DOM documents associated with a
// set of workers. With nested workers, multiple workers can share the same
// WorkerDocumentSet (meaning that they all share the same lifetime, and will
// all exit when the last document in that set exits, per the WebWorkers spec).
class WorkerDocumentSet : public base::RefCounted<WorkerDocumentSet> {
public:
WorkerDocumentSet();
// The information we track for each document
class DocumentInfo {
public:
DocumentInfo(WorkerMessageFilter* filter, unsigned long long document_id,
int renderer_process_id, int render_frame_id);
WorkerMessageFilter* filter() const { return filter_; }
unsigned long long document_id() const { return document_id_; }
int render_process_id() const { return render_process_id_; }
int render_frame_id() const { return render_frame_id_; }
// Define operator "<", which is used to determine uniqueness within
// the set.
bool operator <(const DocumentInfo& other) const {
// Items are identical if the sender and document_id are identical,
// otherwise create an arbitrary stable ordering based on the document
// id/filter.
if (filter() == other.filter()) {
return document_id() < other.document_id();
} else {
return reinterpret_cast<unsigned long long>(filter()) <
reinterpret_cast<unsigned long long>(other.filter());
}
}
private:
WorkerMessageFilter* filter_;
unsigned long long document_id_;
int render_process_id_;
int render_frame_id_;
};
// Adds a document to a shared worker's document set. Also includes the
// associated render_process_id the document is associated with, to enable
// communication with the parent tab for things like http auth dialogs.
void Add(WorkerMessageFilter* parent,
unsigned long long document_id,
int render_process_id,
int render_frame_id);
// Checks to see if a document is in a shared worker's document set.
bool Contains(WorkerMessageFilter* parent,
unsigned long long document_id) const;
// Removes a specific document from a worker's document set when that document
// is detached.
void Remove(WorkerMessageFilter* parent, unsigned long long document_id);
// Invoked when a render process exits, to remove all associated documents
// from a worker's document set.
void RemoveAll(WorkerMessageFilter* parent);
bool IsEmpty() const { return document_set_.empty(); }
// Define a typedef for convenience here when declaring iterators, etc.
typedef std::set<DocumentInfo> DocumentInfoSet;
// Returns the set of documents associated with this worker.
const DocumentInfoSet& documents() { return document_set_; }
private:
friend class base::RefCounted<WorkerDocumentSet>;
virtual ~WorkerDocumentSet();
DocumentInfoSet document_set_;
};
} // namespace content
#endif // CONTENT_BROWSER_WORKER_HOST_WORKER_DOCUMENT_SET_H_
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