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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "chrome/browser/extensions/clipboard_extension_helper_chromeos.h" | |
6 | |
7 #include "base/callback_helpers.h" | |
8 #include "base/macros.h" | |
9 #include "base/metrics/histogram_macros.h" | |
10 #include "base/synchronization/cancellation_flag.h" | |
11 #include "chrome/browser/image_decoder.h" | |
12 #include "content/public/browser/browser_thread.h" | |
13 #include "ui/base/clipboard/scoped_clipboard_writer.h" | |
14 | |
15 using content::BrowserThread; | |
16 | |
17 namespace extensions { | |
18 | |
19 namespace clipboard = api::clipboard; | |
20 | |
21 class ClipboardExtensionHelper::ClipboardImageDataDecoder | |
22 : public ImageDecoder::ImageRequest { | |
23 public: | |
24 explicit ClipboardImageDataDecoder(ClipboardExtensionHelper* owner) | |
25 : owner_(owner) {} | |
26 | |
27 ~ClipboardImageDataDecoder() override { ImageDecoder::Cancel(this); } | |
28 | |
29 bool has_request_pending() const { return has_request_pending_; } | |
30 | |
31 void Start(const std::vector<char>& image_data, clipboard::ImageType type) { | |
32 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
33 std::string image_data_str(image_data.begin(), image_data.end()); | |
34 | |
35 ImageDecoder::ImageCodec codec = ImageDecoder::DEFAULT_CODEC; | |
36 switch (type) { | |
37 case clipboard::IMAGE_TYPE_PNG: | |
38 codec = ImageDecoder::ROBUST_PNG_CODEC; | |
39 break; | |
40 case clipboard::IMAGE_TYPE_JPEG: | |
41 codec = ImageDecoder::ROBUST_JPEG_CODEC; | |
42 break; | |
43 default: | |
dcheng
2017/01/04 19:45:23
Nit: Remove this case, because the parameter valid
jennyz
2017/01/04 23:05:31
Done.
| |
44 OnDecodeImageFailed(); | |
45 break; | |
46 } | |
47 | |
48 has_request_pending_ = true; | |
49 ImageDecoder::StartWithOptions(this, image_data_str, codec, true); | |
50 } | |
51 | |
52 void Cancel() { | |
53 has_request_pending_ = false; | |
54 ImageDecoder::Cancel(this); | |
55 owner_->OnImageDecodeCancel(); | |
56 } | |
57 | |
58 void OnImageDecoded(const SkBitmap& decoded_image) override { | |
59 has_request_pending_ = false; | |
60 owner_->OnImageDecoded(decoded_image); | |
61 } | |
62 | |
63 void OnDecodeImageFailed() override { | |
64 has_request_pending_ = false; | |
65 owner_->OnImageDecodeFailure(); | |
66 } | |
67 | |
68 private: | |
69 ClipboardExtensionHelper* owner_; // Not owned. | |
70 bool has_request_pending_ = false; | |
71 | |
72 DISALLOW_COPY_AND_ASSIGN(ClipboardImageDataDecoder); | |
73 }; | |
74 | |
75 ClipboardExtensionHelper::ClipboardExtensionHelper() { | |
76 clipboard_image_data_decoder_.reset(new ClipboardImageDataDecoder(this)); | |
77 } | |
78 | |
79 ClipboardExtensionHelper::~ClipboardExtensionHelper() {} | |
80 | |
81 void ClipboardExtensionHelper::DecodeAndSaveImageData( | |
82 const std::vector<char>& data, | |
83 clipboard::ImageType type, | |
84 const base::Closure& success_callback, | |
85 const base::Callback<void(const std::string&)>& error_callback) { | |
86 DCHECK_CURRENTLY_ON(BrowserThread::UI); | |
87 | |
88 // If there is a previous image decoding request still running, cancel it | |
89 // first. We only need the most recent image save request be completed, since | |
90 // the clipboard will only store data set by the most recent request, which | |
91 // is consistent with the clipboard "paste" behavior. | |
92 if (clipboard_image_data_decoder_->has_request_pending()) | |
93 clipboard_image_data_decoder_->Cancel(); | |
94 | |
95 image_save_success_callback_ = success_callback; | |
96 image_save_error_callback_ = error_callback; | |
97 clipboard_image_data_decoder_->Start(data, type); | |
98 } | |
99 | |
100 void ClipboardExtensionHelper::OnImageDecodeFailure() { | |
101 base::ResetAndReturn(&image_save_error_callback_) | |
102 .Run("Image data decoding failed"); | |
103 } | |
104 | |
105 void ClipboardExtensionHelper::OnImageDecoded(const SkBitmap& bitmap) { | |
106 { | |
107 ui::ScopedClipboardWriter scw(ui::CLIPBOARD_TYPE_COPY_PASTE); | |
108 // Write the decoded image data to clipboard. | |
109 if (!bitmap.empty() && !bitmap.isNull()) | |
110 scw.WriteImage(bitmap); | |
111 } | |
112 base::ResetAndReturn(&image_save_success_callback_).Run(); | |
113 } | |
114 | |
115 void ClipboardExtensionHelper::OnImageDecodeCancel() { | |
116 base::ResetAndReturn(&image_save_error_callback_).Run("Request canceled"); | |
117 } | |
118 | |
119 } // namespace extensions | |
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