blob: d06aad445752c6798424201dd118eb80b2737884 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
// 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_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_
#define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_
#include "base/callback.h"
#include "base/file_path.h"
#include "content/common/content_export.h"
#include "content/public/browser/download_danger_type.h"
#include "content/public/browser/download_item.h"
class DownloadFileManager;
class DownloadItemImpl;
namespace content {
class BrowserContext;
}
// Delegate for operations that a DownloadItemImpl can't do for itself.
// The base implementation of this class does nothing (returning false
// on predicates) so interfaces not of interest to a derived class may
// be left unimplemented.
class CONTENT_EXPORT DownloadItemImplDelegate {
public:
typedef base::Callback<void(
const FilePath&, // Target path
content::DownloadItem::TargetDisposition, // overwrite/uniquify target
content::DownloadDangerType,
const FilePath& // Intermediate file path
)> DownloadTargetCallback;
DownloadItemImplDelegate();
virtual ~DownloadItemImplDelegate();
// Used for catching use-after-free errors.
void Attach();
void Detach();
// Request determination of the download target from the delegate.
virtual void DetermineDownloadTarget(
DownloadItemImpl* download, const DownloadTargetCallback& callback);
// Allows the delegate to delay completion of the download. This function
// will call the callback passed when the download is ready for completion.
// This may be done immediately, from within the routine itself, or it
// may be delayed.
// This routine should only be called once per download.
virtual void ReadyForDownloadCompletion(
DownloadItemImpl* download,
const base::Closure& complete_callback);
// Allows the delegate to override the opening of a download. If it returns
// true then it's reponsible for opening the item.
virtual bool ShouldOpenDownload(DownloadItemImpl* download);
// Tests if a file type should be opened automatically.
virtual bool ShouldOpenFileBasedOnExtension(const FilePath& path);
// Checks whether a downloaded file still exists and updates the
// file's state if the file is already removed.
// The check may or may not result in a later asynchronous call
// to OnDownloadedFileRemoved().
virtual void CheckForFileRemoval(DownloadItemImpl* download_item);
// For contextual issues like language and prefs.
virtual content::BrowserContext* GetBrowserContext() const;
// Get the DownloadFileManager to use for this download.
virtual DownloadFileManager* GetDownloadFileManager();
// Update the persistent store with our information.
virtual void UpdatePersistence(DownloadItemImpl* download);
// Handle any delegate portions of a state change operation on the
// DownloadItem.
virtual void DownloadStopped(DownloadItemImpl* download);
virtual void DownloadCompleted(DownloadItemImpl* download);
virtual void DownloadOpened(DownloadItemImpl* download);
virtual void DownloadRemoved(DownloadItemImpl* download);
virtual void DownloadRenamedToIntermediateName(
DownloadItemImpl* download);
virtual void DownloadRenamedToFinalName(DownloadItemImpl* download);
// Assert consistent state for delgate object at various transitions.
virtual void AssertStateConsistent(DownloadItemImpl* download) const;
private:
// For "Outlives attached DownloadItemImpl" invariant assertion.
int count_;
DISALLOW_COPY_AND_ASSIGN(DownloadItemImplDelegate);
};
#endif // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_DELEGATE_H_
|
