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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: |
| 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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