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content / browser / renderer_host / clipboard_host_impl.cc [blame]
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/renderer_host/clipboard_host_impl.h"
#include <memory>
#include <set>
#include <utility>
#include "base/files/file_path.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/memory/ptr_util.h"
#include "base/memory/raw_ptr_exclusion.h"
#include "base/notreached.h"
#include "base/pickle.h"
#include "base/ranges/algorithm.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/sequenced_task_runner.h"
#include "base/types/optional_util.h"
#include "build/build_config.h"
#include "content/browser/file_system/browser_file_system_helper.h"
#include "content/browser/file_system_access/file_system_access_manager_impl.h"
#include "content/browser/permissions/permission_controller_impl.h"
#include "content/browser/renderer_host/data_transfer_util.h"
#include "content/browser/renderer_host/render_frame_host_delegate.h"
#include "content/browser/storage_partition_impl.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/child_process_host.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_client.h"
#include "content/public/common/drop_data.h"
#include "ipc/ipc_message.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "mojo/public/cpp/system/platform_handle.h"
#include "skia/ext/skia_utils_base.h"
#include "third_party/abseil-cpp/absl/types/variant.h"
#include "third_party/blink/public/mojom/clipboard/clipboard.mojom.h"
#include "third_party/blink/public/mojom/drag/drag.mojom-forward.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/base/clipboard/clipboard_constants.h"
#include "ui/base/clipboard/clipboard_format_type.h"
#include "ui/base/clipboard/clipboard_monitor.h"
#include "ui/base/clipboard/clipboard_observer.h"
#include "ui/base/clipboard/custom_data_helper.h"
#include "ui/base/clipboard/file_info.h"
#include "ui/base/clipboard/scoped_clipboard_writer.h"
#include "ui/base/data_transfer_policy/data_transfer_endpoint.h"
#include "ui/base/data_transfer_policy/data_transfer_policy_controller.h"
#include "url/gurl.h"
#if BUILDFLAG(IS_CHROMEOS_ASH)
#include "content/public/common/url_constants.h"
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
namespace content {
namespace {
// Used to skip content analysis checks when the source and destination of the
// clipboard data are the same.
struct LastClipboardWriterInfo {
// RFH ID of the last RFH to have committed data to the clipboard.
GlobalRenderFrameHostId rfh_id;
// The sequence number of the last commit made to the clipboard by the
// browser.
ui::ClipboardSequenceNumberToken seqno;
};
LastClipboardWriterInfo& LastClipboardWriterInfoStorage() {
static LastClipboardWriterInfo info;
return info;
}
// Helper observer used to keep track of the last copy operation made from
// the browser. This is used to ensure that `ui::Clipboard::GetSequenceNumber`
// is always used with a updated value, which is not always synchronous
// depending on platform.
class CopyObserver : public ui::ClipboardObserver {
public:
CopyObserver() { ui::ClipboardMonitor::GetInstance()->AddObserver(this); }
private:
void OnClipboardDataChanged() override {
LastClipboardWriterInfoStorage().seqno =
ui::Clipboard::GetForCurrentThread()->GetSequenceNumber(
ui::ClipboardBuffer::kCopyPaste);
}
};
void ClearIfLastClipboardWriterIs(const RenderFrameHost& rfh) {
if (LastClipboardWriterInfoStorage().rfh_id == rfh.GetGlobalId()) {
LastClipboardWriterInfoStorage() = {};
}
}
std::u16string ExtractText(ui::ClipboardBuffer clipboard_buffer,
std::unique_ptr<ui::DataTransferEndpoint> data_dst) {
ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
std::u16string result;
if (clipboard->IsFormatAvailable(ui::ClipboardFormatType::PlainTextType(),
clipboard_buffer, data_dst.get())) {
clipboard->ReadText(clipboard_buffer, data_dst.get(), &result);
} else {
#if BUILDFLAG(IS_WIN)
if (clipboard->IsFormatAvailable(ui::ClipboardFormatType::PlainTextAType(),
clipboard_buffer, data_dst.get())) {
std::string ascii;
clipboard->ReadAsciiText(clipboard_buffer, data_dst.get(), &ascii);
result = base::ASCIIToUTF16(ascii);
}
#endif
}
return result;
}
} // namespace
bool IsLastClipboardWrite(const RenderFrameHost& rfh,
ui::ClipboardSequenceNumberToken seqno) {
const auto& info = LastClipboardWriterInfoStorage();
return info.rfh_id == rfh.GetGlobalId() && info.seqno == seqno;
}
void SetLastClipboardWrite(const RenderFrameHost& rfh,
ui::ClipboardSequenceNumberToken seqno) {
LastClipboardWriterInfoStorage() = {
.rfh_id = rfh.GetGlobalId(),
.seqno = seqno,
};
}
ClipboardEndpoint GetSourceClipboardEndpoint(
ui::ClipboardSequenceNumberToken seqno,
ui::ClipboardBuffer clipboard_buffer) {
const auto& info = LastClipboardWriterInfoStorage();
auto* rfh = RenderFrameHost::FromID(info.rfh_id);
if (info.seqno != seqno || !rfh) {
// Fall back to the clipboard source if there is no `seqno` match or RFH, as
// `ui::DataTransferEndpoint` can be populated differently based on
// platform.
return ClipboardEndpoint(
ui::Clipboard::GetForCurrentThread()->GetSource(clipboard_buffer));
}
std::optional<ui::DataTransferEndpoint> source_dte;
auto clipboard_source_dte =
ui::Clipboard::GetForCurrentThread()->GetSource(clipboard_buffer);
if (clipboard_source_dte) {
if (clipboard_source_dte->IsUrlType()) {
source_dte = std::make_optional<ui::DataTransferEndpoint>(
*clipboard_source_dte->GetURL(),
ui::DataTransferEndpointOptions{
.off_the_record = rfh->GetBrowserContext()->IsOffTheRecord()});
} else {
source_dte = std::move(clipboard_source_dte);
}
}
return ClipboardEndpoint(
std::move(source_dte),
base::BindRepeating(
[](GlobalRenderFrameHostId rfh_id) -> BrowserContext* {
auto* rfh = RenderFrameHost::FromID(rfh_id);
if (!rfh) {
return nullptr;
}
return rfh->GetBrowserContext();
},
info.rfh_id),
*rfh);
}
ClipboardHostImpl::ClipboardHostImpl(
RenderFrameHost& render_frame_host,
mojo::PendingReceiver<blink::mojom::ClipboardHost> receiver)
: DocumentService(render_frame_host, std::move(receiver)) {
static base::NoDestructor<CopyObserver> observer;
clipboard_writer_ = std::make_unique<ui::ScopedClipboardWriter>(
ui::ClipboardBuffer::kCopyPaste, CreateDataEndpoint());
}
void ClipboardHostImpl::Create(
RenderFrameHost* render_frame_host,
mojo::PendingReceiver<blink::mojom::ClipboardHost> receiver) {
CHECK(render_frame_host);
// The object is bound to the lifetime of |render_frame_host| and the mojo
// connection. See DocumentService for details.
new ClipboardHostImpl(*render_frame_host, std::move(receiver));
}
ClipboardHostImpl::~ClipboardHostImpl() {
ClearIfLastClipboardWriterIs(render_frame_host());
clipboard_writer_->Reset();
}
void ClipboardHostImpl::GetSequenceNumber(ui::ClipboardBuffer clipboard_buffer,
GetSequenceNumberCallback callback) {
std::move(callback).Run(
ui::Clipboard::GetForCurrentThread()->GetSequenceNumber(
clipboard_buffer));
}
void ClipboardHostImpl::ReadAvailableTypes(
ui::ClipboardBuffer clipboard_buffer,
ReadAvailableTypesCallback callback) {
std::vector<std::u16string> types;
auto* clipboard = ui::Clipboard::GetForCurrentThread();
auto data_endpoint = CreateDataEndpoint();
// ReadAvailableTypes() returns 'text/uri-list' if either files are provided,
// or if it was set as a custom web type. If it is set because files are
// available, do not include other types such as text/plain which contain the
// full path on some platforms (http://crbug.com/1214108). But do not exclude
// other types when it is set as a custom web type (http://crbug.com/1241671).
bool file_type_only =
clipboard->IsFormatAvailable(ui::ClipboardFormatType::FilenamesType(),
clipboard_buffer, data_endpoint.get());
#if BUILDFLAG(IS_CHROMEOS_ASH)
// ChromeOS FilesApp must include the custom 'fs/sources', etc data for
// paste that it put on the clipboard during copy (b/271078230). This can be
// removed when ash is fully replaced by lacros.
if (render_frame_host().GetMainFrame()->GetLastCommittedURL().SchemeIs(
kChromeUIScheme)) {
file_type_only = false;
}
#endif // BUILDFLAG(IS_CHROMEOS_ASH)
if (file_type_only) {
types = {base::UTF8ToUTF16(ui::kMimeTypeURIList)};
} else {
clipboard->ReadAvailableTypes(clipboard_buffer, data_endpoint.get(),
&types);
}
std::move(callback).Run(types);
}
void ClipboardHostImpl::IsFormatAvailable(blink::mojom::ClipboardFormat format,
ui::ClipboardBuffer clipboard_buffer,
IsFormatAvailableCallback callback) {
ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
bool result = false;
auto data_endpoint = CreateDataEndpoint();
switch (format) {
case blink::mojom::ClipboardFormat::kPlaintext:
result =
clipboard->IsFormatAvailable(ui::ClipboardFormatType::PlainTextType(),
clipboard_buffer, data_endpoint.get());
#if BUILDFLAG(IS_WIN)
result |= clipboard->IsFormatAvailable(
ui::ClipboardFormatType::PlainTextAType(), clipboard_buffer,
data_endpoint.get());
#endif
break;
case blink::mojom::ClipboardFormat::kHtml:
result =
clipboard->IsFormatAvailable(ui::ClipboardFormatType::HtmlType(),
clipboard_buffer, data_endpoint.get());
break;
case blink::mojom::ClipboardFormat::kSmartPaste:
result = clipboard->IsFormatAvailable(
ui::ClipboardFormatType::WebKitSmartPasteType(), clipboard_buffer,
data_endpoint.get());
break;
case blink::mojom::ClipboardFormat::kBookmark:
#if BUILDFLAG(IS_WIN) || BUILDFLAG(IS_MAC)
result =
clipboard->IsFormatAvailable(ui::ClipboardFormatType::UrlType(),
clipboard_buffer, data_endpoint.get());
#else
result = false;
#endif
break;
}
std::move(callback).Run(result);
}
void ClipboardHostImpl::ReadText(ui::ClipboardBuffer clipboard_buffer,
ReadTextCallback callback) {
if (!IsRendererPasteAllowed(clipboard_buffer, render_frame_host())) {
std::move(callback).Run(std::u16string());
return;
}
ClipboardPasteData clipboard_paste_data;
clipboard_paste_data.text =
ExtractText(clipboard_buffer, CreateDataEndpoint());
PasteIfPolicyAllowed(
clipboard_buffer, ui::ClipboardFormatType::PlainTextType(),
std::move(clipboard_paste_data),
base::BindOnce(
[](ReadTextCallback callback,
std::optional<ClipboardPasteData> clipboard_paste_data) {
std::u16string result;
if (clipboard_paste_data) {
result = std::move(clipboard_paste_data->text);
}
std::move(callback).Run(std::move(result));
},
std::move(callback)));
}
void ClipboardHostImpl::ReadHtml(ui::ClipboardBuffer clipboard_buffer,
ReadHtmlCallback callback) {
if (!IsRendererPasteAllowed(clipboard_buffer, render_frame_host())) {
std::move(callback).Run(std::u16string(), GURL(), 0, 0);
return;
}
ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
ClipboardPasteData clipboard_paste_data;
std::string src_url_str;
uint32_t fragment_start = 0;
uint32_t fragment_end = 0;
auto data_dst = CreateDataEndpoint();
clipboard->ReadHTML(clipboard_buffer, data_dst.get(),
&clipboard_paste_data.html, &src_url_str, &fragment_start,
&fragment_end);
PasteIfPolicyAllowed(
clipboard_buffer, ui::ClipboardFormatType::HtmlType(),
std::move(clipboard_paste_data),
base::BindOnce(
[](std::string src_url_str, uint32_t fragment_start,
uint32_t fragment_end, ReadHtmlCallback callback,
std::optional<ClipboardPasteData> clipboard_paste_data) {
std::u16string markup;
if (clipboard_paste_data) {
markup = std::move(clipboard_paste_data->html);
}
std::move(callback).Run(std::move(markup), GURL(src_url_str),
fragment_start, fragment_end);
},
std::move(src_url_str), fragment_start, fragment_end,
std::move(callback)));
}
void ClipboardHostImpl::ReadSvg(ui::ClipboardBuffer clipboard_buffer,
ReadSvgCallback callback) {
if (!IsRendererPasteAllowed(clipboard_buffer, render_frame_host())) {
std::move(callback).Run(std::u16string());
return;
}
ClipboardPasteData clipboard_paste_data;
ui::Clipboard::GetForCurrentThread()->ReadSvg(clipboard_buffer,
/*data_dst=*/nullptr,
&clipboard_paste_data.svg);
PasteIfPolicyAllowed(
clipboard_buffer, ui::ClipboardFormatType::SvgType(),
std::move(clipboard_paste_data),
base::BindOnce(
[](ReadSvgCallback callback,
std::optional<ClipboardPasteData> clipboard_paste_data) {
std::u16string svg;
if (clipboard_paste_data) {
svg = std::move(clipboard_paste_data->svg);
}
std::move(callback).Run(std::move(svg));
},
std::move(callback)));
}
void ClipboardHostImpl::ReadRtf(ui::ClipboardBuffer clipboard_buffer,
ReadRtfCallback callback) {
if (!IsRendererPasteAllowed(clipboard_buffer, render_frame_host())) {
std::move(callback).Run(std::string());
return;
}
ClipboardPasteData clipboard_paste_data;
auto data_dst = CreateDataEndpoint();
ui::Clipboard::GetForCurrentThread()->ReadRTF(
clipboard_buffer, data_dst.get(), &clipboard_paste_data.rtf);
PasteIfPolicyAllowed(
clipboard_buffer, ui::ClipboardFormatType::RtfType(),
std::move(clipboard_paste_data),
base::BindOnce(
[](ReadRtfCallback callback,
std::optional<ClipboardPasteData> clipboard_paste_data) {
std::string result;
if (clipboard_paste_data) {
result = std::move(clipboard_paste_data->rtf);
}
std::move(callback).Run(std::move(result));
},
std::move(callback)));
}
void ClipboardHostImpl::ReadPng(ui::ClipboardBuffer clipboard_buffer,
ReadPngCallback callback) {
if (!IsRendererPasteAllowed(clipboard_buffer, render_frame_host())) {
std::move(callback).Run(mojo_base::BigBuffer());
return;
}
auto data_dst = CreateDataEndpoint();
ui::Clipboard::GetForCurrentThread()->ReadPng(
clipboard_buffer, data_dst.get(),
base::BindOnce(&ClipboardHostImpl::OnReadPng,
weak_ptr_factory_.GetWeakPtr(), clipboard_buffer,
std::move(callback)));
}
void ClipboardHostImpl::OnReadPng(ui::ClipboardBuffer clipboard_buffer,
ReadPngCallback callback,
const std::vector<uint8_t>& data) {
// Pass both image and associated text for content analysis.
ClipboardPasteData clipboard_paste_data;
clipboard_paste_data.text =
ExtractText(clipboard_buffer, CreateDataEndpoint());
clipboard_paste_data.png = data;
PasteIfPolicyAllowed(
clipboard_buffer, ui::ClipboardFormatType::PngType(),
std::move(clipboard_paste_data),
base::BindOnce(
[](ReadPngCallback callback,
std::optional<ClipboardPasteData> clipboard_paste_data) {
if (!clipboard_paste_data.has_value()) {
std::move(callback).Run(mojo_base::BigBuffer());
return;
}
std::move(callback).Run(
mojo_base::BigBuffer(std::move(clipboard_paste_data->png)));
},
std::move(callback)));
}
void ClipboardHostImpl::ReadFiles(ui::ClipboardBuffer clipboard_buffer,
ReadFilesCallback callback) {
blink::mojom::ClipboardFilesPtr result = blink::mojom::ClipboardFiles::New();
if (!IsRendererPasteAllowed(clipboard_buffer, render_frame_host())) {
std::move(callback).Run(std::move(result));
return;
}
ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
std::vector<ui::FileInfo> filenames;
auto data_dst = CreateDataEndpoint();
clipboard->ReadFilenames(clipboard_buffer, data_dst.get(), &filenames);
// Convert the vector of ui::FileInfo into a vector of base::FilePath so that
// it can be passed to PerformPasteIfContentAllowed() for analysis. When
// the latter is called with ui::ClipboardFormatType::FilenamesType() the
// data to be analyzed is expected to be a newline-separated list of full
// paths.
std::vector<base::FilePath> paths;
paths.reserve(filenames.size());
base::ranges::transform(filenames, std::back_inserter(paths),
[](const ui::FileInfo& info) { return info.path; });
ClipboardPasteData clipboard_paste_data;
clipboard_paste_data.file_paths = std::move(paths);
// This code matches the drag-and-drop DataTransfer code in
// RenderWidgetHostImpl::DragTargetDrop().
// Call PrepareDataTransferFilenamesForChildProcess() to register files so
// they can be accessed by the renderer.
RenderProcessHost* process = render_frame_host().GetProcess();
result->file_system_id = PrepareDataTransferFilenamesForChildProcess(
filenames, ChildProcessSecurityPolicyImpl::GetInstance(),
process->GetID(), process->GetStoragePartition()->GetFileSystemContext());
// Convert to DataTransferFiles which creates the access token for each file.
StoragePartitionImpl* storage_partition = static_cast<StoragePartitionImpl*>(
render_frame_host().GetProcess()->GetStoragePartition());
std::vector<blink::mojom::DataTransferFilePtr> files =
FileInfosToDataTransferFiles(
filenames, storage_partition->GetFileSystemAccessManager(),
process->GetID());
std::move(files.begin(), files.end(), std::back_inserter(result->files));
PasteIfPolicyAllowed(
clipboard_buffer, ui::ClipboardFormatType::FilenamesType(),
std::move(clipboard_paste_data),
base::BindOnce(
[](blink::mojom::ClipboardFilesPtr result, ReadFilesCallback callback,
std::optional<ClipboardPasteData> clipboard_paste_data) {
if (!clipboard_paste_data) {
result->files.clear();
result->file_system_id->clear();
} else {
// A subset of the files can be copied. Remove any files that
// should be blocked. First build a list of the files that are
// allowed.
std::set<base::FilePath> allowed_files(
std::move_iterator(clipboard_paste_data->file_paths.begin()),
std::move_iterator(clipboard_paste_data->file_paths.end()));
for (auto it = result->files.begin();
it != result->files.end();) {
if (allowed_files.find(it->get()->path) !=
allowed_files.end()) {
it = std::next(it);
} else {
it = result->files.erase(it);
}
}
}
std::move(callback).Run(std::move(result));
},
std::move(result), std::move(callback)));
}
void ClipboardHostImpl::ReadDataTransferCustomData(
ui::ClipboardBuffer clipboard_buffer,
const std::u16string& type,
ReadDataTransferCustomDataCallback callback) {
if (!IsRendererPasteAllowed(clipboard_buffer, render_frame_host())) {
std::move(callback).Run(std::u16string());
return;
}
ClipboardPasteData clipboard_paste_data;
auto data_dst = CreateDataEndpoint();
ui::Clipboard::GetForCurrentThread()->ReadDataTransferCustomData(
clipboard_buffer, type, data_dst.get(),
&clipboard_paste_data.custom_data[type]);
PasteIfPolicyAllowed(
clipboard_buffer, ui::ClipboardFormatType::DataTransferCustomType(),
std::move(clipboard_paste_data),
base::BindOnce(
[](ReadDataTransferCustomDataCallback callback,
const std::u16string& type,
std::optional<ClipboardPasteData> clipboard_paste_data) {
std::u16string result;
if (clipboard_paste_data) {
result = std::move(clipboard_paste_data->custom_data[type]);
}
std::move(callback).Run(std::move(result));
},
std::move(callback), type));
}
void ClipboardHostImpl::WriteText(const std::u16string& text) {
ClipboardPasteData data;
data.text = text;
++pending_writes_;
GetContentClient()->browser()->IsClipboardCopyAllowedByPolicy(
CreateClipboardEndpoint(),
{
.size = text.size() * sizeof(std::u16string::value_type),
.format_type = ui::ClipboardFormatType::PlainTextType(),
},
data,
base::BindOnce(&ClipboardHostImpl::OnCopyAllowedResult,
weak_ptr_factory_.GetWeakPtr()));
}
void ClipboardHostImpl::WriteHtml(const std::u16string& markup,
const GURL& url) {
ClipboardPasteData data;
data.html = markup;
++pending_writes_;
GetContentClient()->browser()->IsClipboardCopyAllowedByPolicy(
CreateClipboardEndpoint(),
{
.size = markup.size() * sizeof(std::u16string::value_type),
.format_type = ui::ClipboardFormatType::HtmlType(),
},
data,
base::BindOnce(&ClipboardHostImpl::OnCopyHtmlAllowedResult,
weak_ptr_factory_.GetWeakPtr(), url));
}
void ClipboardHostImpl::WriteSvg(const std::u16string& markup) {
ClipboardPasteData data;
data.svg = markup;
++pending_writes_;
GetContentClient()->browser()->IsClipboardCopyAllowedByPolicy(
CreateClipboardEndpoint(),
{
.size = markup.size() * sizeof(std::u16string::value_type),
.format_type = ui::ClipboardFormatType::SvgType(),
},
data,
base::BindOnce(&ClipboardHostImpl::OnCopyAllowedResult,
weak_ptr_factory_.GetWeakPtr()));
}
void ClipboardHostImpl::WriteSmartPasteMarker() {
clipboard_writer_->WriteWebSmartPaste();
}
void ClipboardHostImpl::WriteDataTransferCustomData(
const base::flat_map<std::u16string, std::u16string>& data) {
ClipboardPasteData clipboard_paste_data;
clipboard_paste_data.custom_data = data;
size_t total_size = 0;
for (const auto& entry : clipboard_paste_data.custom_data) {
total_size += entry.second.size();
}
++pending_writes_;
GetContentClient()->browser()->IsClipboardCopyAllowedByPolicy(
CreateClipboardEndpoint(),
{
.size = total_size,
.format_type = ui::ClipboardFormatType::DataTransferCustomType(),
},
clipboard_paste_data,
base::BindOnce(&ClipboardHostImpl::OnCopyAllowedResult,
weak_ptr_factory_.GetWeakPtr()));
}
void ClipboardHostImpl::WriteBookmark(const std::string& url,
const std::u16string& title) {
clipboard_writer_->WriteBookmark(title, url);
}
void ClipboardHostImpl::WriteImage(const SkBitmap& bitmap) {
ClipboardPasteData data;
data.bitmap = bitmap;
++pending_writes_;
GetContentClient()->browser()->IsClipboardCopyAllowedByPolicy(
CreateClipboardEndpoint(),
{
.size = bitmap.computeByteSize(),
.format_type = ui::ClipboardFormatType::BitmapType(),
},
std::move(data),
base::BindOnce(&ClipboardHostImpl::OnCopyAllowedResult,
weak_ptr_factory_.GetWeakPtr()));
}
void ClipboardHostImpl::CommitWrite() {
if (pending_writes_ != 0) {
// This branch indicates that some callbacks passed to
// `IsClipboardCopyAllowedByPolicy` still haven't been called, so committing
// data to the clipboard should be delayed.
pending_commit_write_ = true;
return;
}
pending_commit_write_ = false;
if (render_frame_host().GetBrowserContext()->IsOffTheRecord()) {
clipboard_writer_->MarkAsOffTheRecord();
}
clipboard_writer_ = std::make_unique<ui::ScopedClipboardWriter>(
ui::ClipboardBuffer::kCopyPaste, CreateDataEndpoint());
LastClipboardWriterInfoStorage().rfh_id = render_frame_host().GetGlobalId();
}
bool ClipboardHostImpl::IsRendererPasteAllowed(
ui::ClipboardBuffer clipboard_buffer,
RenderFrameHost& render_frame_host) {
return GetContentClient()->browser()->IsClipboardPasteAllowed(
&render_frame_host);
}
void ClipboardHostImpl::ReadAvailableCustomAndStandardFormats(
ReadAvailableCustomAndStandardFormatsCallback callback) {
std::vector<std::u16string> format_types =
ui::Clipboard::GetForCurrentThread()
->ReadAvailableStandardAndCustomFormatNames(
ui::ClipboardBuffer::kCopyPaste, CreateDataEndpoint().get());
std::move(callback).Run(format_types);
}
void ClipboardHostImpl::ReadUnsanitizedCustomFormat(
const std::u16string& format,
ReadUnsanitizedCustomFormatCallback callback) {
// `kMaxFormatSize` includes the null terminator as well so we check if
// the `format` size is strictly less than `kMaxFormatSize` or not.
if (format.length() >= blink::mojom::ClipboardHost::kMaxFormatSize)
return;
// Extract the custom format names and then query the web custom format
// corresponding to the MIME type.
std::string format_name = base::UTF16ToASCII(format);
auto data_endpoint = CreateDataEndpoint();
std::map<std::string, std::string> custom_format_names =
ui::Clipboard::GetForCurrentThread()->ExtractCustomPlatformNames(
ui::ClipboardBuffer::kCopyPaste, data_endpoint.get());
std::string web_custom_format_string;
if (custom_format_names.find(format_name) != custom_format_names.end())
web_custom_format_string = custom_format_names[format_name];
if (web_custom_format_string.empty())
return;
std::string result;
ui::Clipboard::GetForCurrentThread()->ReadData(
ui::ClipboardFormatType::GetType(web_custom_format_string),
data_endpoint.get(), &result);
if (result.size() >= blink::mojom::ClipboardHost::kMaxDataSize)
return;
base::span<const uint8_t> span = base::as_bytes(base::make_span(result));
mojo_base::BigBuffer buffer = mojo_base::BigBuffer(span);
std::move(callback).Run(std::move(buffer));
}
void ClipboardHostImpl::WriteUnsanitizedCustomFormat(
const std::u16string& format,
mojo_base::BigBuffer data) {
// `kMaxFormatSize` & `kMaxDataSize` includes the null terminator.
if (format.length() >= blink::mojom::ClipboardHost::kMaxFormatSize)
return;
if (data.size() >= blink::mojom::ClipboardHost::kMaxDataSize)
return;
// The `format` is mapped to user agent defined web custom format before
// writing to the clipboard. This happens in
// `ScopedClipboardWriter::WriteData`.
clipboard_writer_->WriteData(format, std::move(data));
}
void ClipboardHostImpl::PasteIfPolicyAllowed(
ui::ClipboardBuffer clipboard_buffer,
const ui::ClipboardFormatType& data_type,
ClipboardPasteData clipboard_paste_data,
IsClipboardPasteAllowedCallback callback) {
std::optional<size_t> data_size;
if (clipboard_paste_data.file_paths.empty()) {
data_size = clipboard_paste_data.size();
}
ui::ClipboardSequenceNumberToken seqno =
ui::Clipboard::GetForCurrentThread()->GetSequenceNumber(clipboard_buffer);
static_cast<RenderFrameHostImpl&>(render_frame_host())
.IsClipboardPasteAllowedByPolicy(
GetSourceClipboardEndpoint(seqno, clipboard_buffer),
CreateClipboardEndpoint(),
{
.size = data_size,
.format_type = data_type,
.seqno = seqno,
},
std::move(clipboard_paste_data), std::move(callback));
}
void ClipboardHostImpl::OnCopyHtmlAllowedResult(
const GURL& source_url,
const ui::ClipboardFormatType& data_type,
const ClipboardPasteData& data,
std::optional<std::u16string> replacement_data) {
DCHECK_GT(pending_writes_, 0);
--pending_writes_;
clipboard_writer_->SetDataSourceURL(
render_frame_host().GetMainFrame()->GetLastCommittedURL(),
render_frame_host().GetLastCommittedURL());
if (replacement_data) {
clipboard_writer_->WriteText(std::move(*replacement_data));
} else {
clipboard_writer_->WriteHTML(data.html, source_url.spec());
}
if (pending_commit_write_) {
CommitWrite();
}
}
void ClipboardHostImpl::OnCopyAllowedResult(
const ui::ClipboardFormatType& data_type,
const ClipboardPasteData& data,
std::optional<std::u16string> replacement_data) {
DCHECK_GT(pending_writes_, 0);
--pending_writes_;
clipboard_writer_->SetDataSourceURL(
render_frame_host().GetMainFrame()->GetLastCommittedURL(),
render_frame_host().GetLastCommittedURL());
// If `replacement_data` is empty, only one of these fields should be
// non-empty depending on which "Write" method was called by the renderer.
if (replacement_data) {
// `replacement_data` having a value implies the copy was not allowed and
// that a warning message should instead be put into the clipboard.
clipboard_writer_->WriteText(std::move(*replacement_data));
} else if (data_type == ui::ClipboardFormatType::PlainTextType()) {
// This branch should be reached only after `WriteText()` is called.
clipboard_writer_->WriteText(data.text);
} else if (data_type == ui::ClipboardFormatType::SvgType()) {
// This branch should be reached only after `WriteSvg()` is called.
clipboard_writer_->WriteSvg(data.svg);
} else if (data_type == ui::ClipboardFormatType::BitmapType()) {
// This branch should be reached only after `WriteImage()` is called.
clipboard_writer_->WriteImage(data.bitmap);
} else if (data_type == ui::ClipboardFormatType::DataTransferCustomType()) {
// This branch should be reached only after `WriteCustomData()` is called.
base::Pickle pickle;
ui::WriteCustomDataToPickle(data.custom_data, &pickle);
clipboard_writer_->WritePickledData(
pickle, ui::ClipboardFormatType::DataTransferCustomType());
} else {
NOTREACHED_IN_MIGRATION();
}
if (pending_commit_write_) {
CommitWrite();
}
// Notify the observer that the write was committed to the clipboard. We do
// this only for text copies but it can be extended to other types if needed.
if (!replacement_data &&
data_type == ui::ClipboardFormatType::PlainTextType()) {
static_cast<RenderFrameHostImpl&>(render_frame_host())
.OnTextCopiedToClipboard(data.text);
}
}
std::unique_ptr<ui::DataTransferEndpoint>
ClipboardHostImpl::CreateDataEndpoint() {
if (!render_frame_host().GetMainFrame()->GetLastCommittedURL().is_valid()) {
return nullptr;
}
return std::make_unique<ui::DataTransferEndpoint>(
render_frame_host().GetMainFrame()->GetLastCommittedURL(),
ui::DataTransferEndpointOptions{
.notify_if_restricted =
render_frame_host().HasTransientUserActivation(),
.off_the_record =
render_frame_host().GetBrowserContext()->IsOffTheRecord(),
});
}
ClipboardEndpoint ClipboardHostImpl::CreateClipboardEndpoint() {
return ClipboardEndpoint(
CreateDataEndpoint().get(),
base::BindRepeating(
[](GlobalRenderFrameHostId rfh_id) -> BrowserContext* {
auto* rfh = RenderFrameHost::FromID(rfh_id);
if (!rfh) {
return nullptr;
}
return rfh->GetBrowserContext();
},
render_frame_host().GetGlobalId()),
render_frame_host());
}
} // namespace content