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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 UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_WIN_H_
#define UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_WIN_H_
#include <objidl.h>
#include <shlobj.h>
#include <string>
#include <vector>
// Win8 SDK compatibility, see http://goo.gl/fufvl for more information.
// "Note: This interface has been renamed IDataObjectAsyncCapability."
// If we're building on pre-8 we define it to its old name. It's documented as
// being binary compatible.
#ifndef __IDataObjectAsyncCapability_FWD_DEFINED__
#define IDataObjectAsyncCapability IAsyncOperation
#endif
#include "base/memory/scoped_vector.h"
#include "base/win/scoped_comptr.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/base/ui_base_export.h"
#include "ui/gfx/geometry/vector2d.h"
#include "ui/gfx/image/image_skia.h"
namespace ui {
class DataObjectImpl : public DownloadFileObserver,
public IDataObject,
public IDataObjectAsyncCapability {
public:
class Observer {
public:
virtual void OnWaitForData() = 0;
virtual void OnDataObjectDisposed() = 0;
protected:
virtual ~Observer() { }
};
DataObjectImpl();
// Accessors.
void set_observer(Observer* observer) { observer_ = observer; }
void set_in_drag_loop(bool in_drag_loop) { in_drag_loop_ = in_drag_loop; }
// Number of known formats.
size_t size() const { return contents_.size(); }
// DownloadFileObserver implementation:
virtual void OnDownloadCompleted(const base::FilePath& file_path);
virtual void OnDownloadAborted();
// IDataObject implementation:
HRESULT __stdcall GetData(FORMATETC* format_etc, STGMEDIUM* medium);
HRESULT __stdcall GetDataHere(FORMATETC* format_etc, STGMEDIUM* medium);
HRESULT __stdcall QueryGetData(FORMATETC* format_etc);
HRESULT __stdcall GetCanonicalFormatEtc(
FORMATETC* format_etc, FORMATETC* result);
HRESULT __stdcall SetData(
FORMATETC* format_etc, STGMEDIUM* medium, BOOL should_release);
HRESULT __stdcall EnumFormatEtc(
DWORD direction, IEnumFORMATETC** enumerator);
HRESULT __stdcall DAdvise(FORMATETC* format_etc, DWORD advf,
IAdviseSink* sink, DWORD* connection);
HRESULT __stdcall DUnadvise(DWORD connection);
HRESULT __stdcall EnumDAdvise(IEnumSTATDATA** enumerator);
// IDataObjectAsyncCapability implementation:
HRESULT __stdcall EndOperation(
HRESULT result, IBindCtx* reserved, DWORD effects);
HRESULT __stdcall GetAsyncMode(BOOL* is_op_async);
HRESULT __stdcall InOperation(BOOL* in_async_op);
HRESULT __stdcall SetAsyncMode(BOOL do_op_async);
HRESULT __stdcall StartOperation(IBindCtx* reserved);
// IUnknown implementation:
HRESULT __stdcall QueryInterface(const IID& iid, void** object);
ULONG __stdcall AddRef();
ULONG __stdcall Release();
private:
// FormatEtcEnumerator only likes us for our StoredDataMap typedef.
friend class FormatEtcEnumerator;
friend class OSExchangeDataProviderWin;
virtual ~DataObjectImpl();
void StopDownloads();
// Removes from contents_ the first data that matches |format|.
void RemoveData(const FORMATETC& format);
// Our internal representation of stored data & type info.
struct StoredDataInfo {
FORMATETC format_etc;
STGMEDIUM* medium;
bool owns_medium;
scoped_refptr<DownloadFileProvider> downloader;
StoredDataInfo(const FORMATETC& format_etc, STGMEDIUM* medium)
: format_etc(format_etc), medium(medium), owns_medium(true) {}
~StoredDataInfo() {
if (owns_medium) {
ReleaseStgMedium(medium);
delete medium;
}
if (downloader.get())
downloader->Stop();
}
};
typedef ScopedVector<StoredDataInfo> StoredData;
StoredData contents_;
base::win::ScopedComPtr<IDataObject> source_object_;
bool is_aborting_;
bool in_drag_loop_;
bool in_async_mode_;
bool async_operation_started_;
Observer* observer_;
};
class UI_BASE_EXPORT OSExchangeDataProviderWin
: public OSExchangeData::Provider {
public:
// Returns true if source has plain text that is a valid url.
static bool HasPlainTextURL(IDataObject* source);
// Returns true if source has plain text that is a valid URL and sets url to
// that url.
static bool GetPlainTextURL(IDataObject* source, GURL* url);
static DataObjectImpl* GetDataObjectImpl(const OSExchangeData& data);
static IDataObject* GetIDataObject(const OSExchangeData& data);
static IDataObjectAsyncCapability* GetIAsyncOperation(
const OSExchangeData& data);
explicit OSExchangeDataProviderWin(IDataObject* source);
OSExchangeDataProviderWin();
virtual ~OSExchangeDataProviderWin();
IDataObject* data_object() const { return data_.get(); }
IDataObjectAsyncCapability* async_operation() const { return data_.get(); }
// OSExchangeData::Provider methods.
Provider* Clone() const override;
void MarkOriginatedFromRenderer() override;
bool DidOriginateFromRenderer() const override;
void SetString(const base::string16& data) override;
void SetURL(const GURL& url, const base::string16& title) override;
void SetFilename(const base::FilePath& path) override;
void SetFilenames(const std::vector<FileInfo>& filenames) override;
void SetPickledData(const OSExchangeData::CustomFormat& format,
const Pickle& data) override;
void SetFileContents(const base::FilePath& filename,
const std::string& file_contents) override;
void SetHtml(const base::string16& html, const GURL& base_url) override;
bool GetString(base::string16* data) const override;
bool GetURLAndTitle(OSExchangeData::FilenameToURLPolicy policy,
GURL* url,
base::string16* title) const override;
bool GetFilename(base::FilePath* path) const override;
bool GetFilenames(std::vector<FileInfo>* filenames) const override;
bool GetPickledData(const OSExchangeData::CustomFormat& format,
Pickle* data) const override;
bool GetFileContents(base::FilePath* filename,
std::string* file_contents) const override;
bool GetHtml(base::string16* html, GURL* base_url) const override;
bool HasString() const override;
bool HasURL(OSExchangeData::FilenameToURLPolicy policy) const override;
bool HasFile() const override;
bool HasFileContents() const override;
bool HasHtml() const override;
bool HasCustomFormat(
const OSExchangeData::CustomFormat& format) const override;
void SetDownloadFileInfo(
const OSExchangeData::DownloadFileInfo& download_info) override;
void SetDragImage(const gfx::ImageSkia& image,
const gfx::Vector2d& cursor_offset) override;
const gfx::ImageSkia& GetDragImage() const override;
const gfx::Vector2d& GetDragImageOffset() const override;
private:
scoped_refptr<DataObjectImpl> data_;
base::win::ScopedComPtr<IDataObject> source_object_;
// Drag image and offset data. Only used for Ash.
gfx::ImageSkia drag_image_;
gfx::Vector2d drag_image_offset_;
DISALLOW_COPY_AND_ASSIGN(OSExchangeDataProviderWin);
};
} // namespace ui
#endif // UI_BASE_DRAGDROP_OS_EXCHANGE_DATA_PROVIDER_WIN_H_
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