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// Copyright (c) 2011 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_FRAME_URLMON_BIND_STATUS_CALLBACK_H_
#define CHROME_FRAME_URLMON_BIND_STATUS_CALLBACK_H_
#include <atlbase.h>
#include <atlcom.h>
#include "base/memory/scoped_ptr.h"
#include "chrome_frame/bind_status_callback_impl.h"
#include "chrome_frame/stream_impl.h"
// A fake stream class to serve cached data to arbitrary
// IBindStatusCallback
class CacheStream : public CComObjectRoot, public StreamImpl {
public:
BEGIN_COM_MAP(CacheStream)
COM_INTERFACE_ENTRY(IStream)
COM_INTERFACE_ENTRY(ISequentialStream)
END_COM_MAP()
CacheStream() : size_(0), position_(0), eof_(false) {
}
HRESULT Initialize(const char* cache, size_t size, bool eof);
static HRESULT BSCBFeedData(IBindStatusCallback* bscb, const char* data,
size_t size, CLIPFORMAT clip_format,
size_t flags, bool eof);
// IStream overrides
STDMETHOD(Read)(void* pv, ULONG cb, ULONG* read);
protected:
scoped_ptr<char[]> cache_;
size_t size_;
size_t position_;
bool eof_;
private:
DISALLOW_COPY_AND_ASSIGN(CacheStream);
};
// Utility class for data sniffing
class SniffData {
public:
SniffData() : renderer_type_(OTHER), size_(0), eof_(false) {}
enum RendererType {
UNDETERMINED,
CHROME,
OTHER
};
HRESULT InitializeCache(const std::wstring& url);
HRESULT ReadIntoCache(IStream* stream, bool force_determination);
HRESULT DrainCache(IBindStatusCallback* bscb, DWORD bscf,
CLIPFORMAT clip_format);
void DetermineRendererType(bool last_chance);
bool is_undetermined() const {
return (UNDETERMINED == renderer_type_);
}
bool is_chrome() const {
return (CHROME == renderer_type_);
}
RendererType renderer_type() const {
return renderer_type_;
}
size_t size() const {
return size_;
}
bool is_cache_valid() {
return (size_ != 0);
}
base::win::ScopedComPtr<IStream> cache_;
std::wstring url_;
RendererType renderer_type_;
size_t size_;
static const size_t kMaxSniffSize = 2 * 1024;
bool eof_;
private:
DISALLOW_COPY_AND_ASSIGN(SniffData);
};
// A wrapper for bind status callback in IMoniker::BindToStorage
class BSCBStorageBind : public BSCBImpl {
public:
typedef BSCBImpl CallbackImpl;
BSCBStorageBind();
~BSCBStorageBind();
BEGIN_COM_MAP(BSCBStorageBind)
COM_INTERFACE_ENTRY(IBindStatusCallback)
COM_INTERFACE_ENTRY_CHAIN(CallbackImpl)
END_COM_MAP()
HRESULT Initialize(IMoniker* moniker, IBindCtx* bind_ctx);
HRESULT MayPlayBack(DWORD flags);
// IBindStatusCallback
STDMETHOD(OnProgress)(ULONG progress, ULONG progress_max, ULONG status_code,
LPCWSTR status_text);
STDMETHOD(OnDataAvailable)(DWORD flags, DWORD size, FORMATETC* format_etc,
STGMEDIUM* stgmed);
STDMETHOD(OnStopBinding)(HRESULT hresult, LPCWSTR error);
protected:
// is it a good time to start caching progress notifications
bool ShouldCacheProgress(ULONG status_code) const;
protected:
SniffData data_sniffer_;
// A structure to cache the progress notifications.
class Progress {
public:
Progress(ULONG progress, ULONG progress_max, ULONG status_code,
const wchar_t* status_text)
: progress_(progress),
progress_max_(progress_max),
status_code_(status_code) {
if (status_text) {
int len = lstrlenW(status_text) + 1;
status_text_.reset(new wchar_t[len]);
if (status_text_.get()) {
lstrcpynW(status_text_.get(), status_text, len);
} else {
NOTREACHED();
}
}
}
~Progress() {
}
ULONG progress() const {
return progress_;
}
ULONG progress_max() const {
return progress_max_;
}
ULONG status_code() const {
return status_code_;
}
const wchar_t* status_text() const {
return status_text_.get();
}
protected:
ULONG progress_;
ULONG progress_max_;
ULONG status_code_;
// We don't use std::wstring here since we want to be able to play
// progress notifications back exactly as we got them. NULL and L"" are
// not equal.
scoped_ptr<wchar_t[]> status_text_;
};
typedef std::vector<Progress*> ProgressVector;
ProgressVector saved_progress_;
CLIPFORMAT clip_format_;
private:
DISALLOW_COPY_AND_ASSIGN(BSCBStorageBind);
};
#endif // CHROME_FRAME_URLMON_BIND_STATUS_CALLBACK_H_
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