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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/ash/clipboard/clipboard_util.h"
#include <stdint.h>
#include <memory>
#include <vector>
#include "ash/public/cpp/clipboard_history_controller.h"
#include "base/base64.h"
#include "base/files/file_util.h"
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/memory/ref_counted_memory.h"
#include "base/memory/scoped_refptr.h"
#include "base/metrics/user_metrics.h"
#include "base/strings/strcat.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/scoped_blocking_call.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "services/data_decoder/public/cpp/decode_image.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/base/clipboard/clipboard_buffer.h"
#include "ui/base/clipboard/clipboard_data.h"
#include "ui/base/clipboard/clipboard_non_backed.h"
#include "ui/base/clipboard/scoped_clipboard_writer.h"
namespace clipboard_util {
namespace {
/*
* `clipboard_sequence` is the versioning of the clipboard when we start our
* copy operation.
* `decoded_image` and `html` are different formats of the same image which we
* are attempting to copy to the clipboard. */
void CopyDecodedImageToClipboard(
ui::ClipboardSequenceNumberToken clipboard_sequence,
std::string html,
const SkBitmap& decoded_image) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
ui::ScopedClipboardWriter clipboard_writer(ui::ClipboardBuffer::kCopyPaste);
clipboard_writer.WriteHTML(base::UTF8ToUTF16(html), std::string());
clipboard_writer.WriteImage(decoded_image);
}
} // namespace
void ReadFileAndCopyToClipboardLocal(const base::FilePath& local_file) {
DCHECK(!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::WILL_BLOCK);
std::string png_data;
if (!base::ReadFileToString(local_file, &png_data)) {
LOG(ERROR) << "Failed to read the screenshot file: " << local_file.value();
return;
}
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&DecodeImageFileAndCopyToClipboard,
/*clipboard_sequence=*/ui::ClipboardSequenceNumberToken(),
std::move(png_data)));
}
void DecodeImageFileAndCopyToClipboard(
ui::ClipboardSequenceNumberToken clipboard_sequence,
std::string png_data) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// Send both HTML and and Image formats to clipboard. HTML format is needed
// by ARC, while Image is needed by Hangout.
static const char kImageClipboardFormatPrefix[] =
"<img src='data:image/png;base64,";
static const char kImageClipboardFormatSuffix[] = "'>";
std::string encoded = base::Base64Encode(base::as_byte_span(png_data));
std::string html = base::StrCat(
{kImageClipboardFormatPrefix, encoded, kImageClipboardFormatSuffix});
// Decode the image in sandboxed process because |png_data| comes from
// external storage.
data_decoder::DecodeImageIsolated(
base::as_byte_span(png_data), data_decoder::mojom::ImageCodec::kDefault,
/*shrink_to_fit=*/false, data_decoder::kDefaultMaxSizeInBytes,
gfx::Size(),
base::BindOnce(&CopyDecodedImageToClipboard, clipboard_sequence,
std::move(html)));
}
} // namespace clipboard_util
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