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print_preview_message_handler.cc
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print_preview_message_handler.cc
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// Copyright (c) 2018 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/browser/printing/print_preview_message_handler.h"
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "base/memory/read_only_shared_memory_region.h"
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/printing/print_job_manager.h"
#include "chrome/browser/printing/printer_query.h"
#include "components/printing/browser/print_composite_client.h"
#include "components/printing/browser/print_manager_utils.h"
#include "components/services/print_compositor/public/cpp/print_service_mojo_types.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_user_data.h"
#include "mojo/public/cpp/bindings/callback_helpers.h"
#include "third_party/blink/public/common/associated_interfaces/associated_interface_provider.h"
#include "shell/common/node_includes.h"
using content::BrowserThread;
namespace electron {
namespace {
void StopWorker(int document_cookie) {
if (document_cookie <= 0)
return;
scoped_refptr<printing::PrintQueriesQueue> queue =
g_browser_process->print_job_manager()->queue();
std::unique_ptr<printing::PrinterQuery> printer_query =
queue->PopPrinterQuery(document_cookie);
if (printer_query.get()) {
content::GetIOThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&printing::PrinterQuery::StopWorker,
std::move(printer_query)));
}
}
} // namespace
PrintPreviewMessageHandler::PrintPreviewMessageHandler(
content::WebContents* web_contents)
: content::WebContentsUserData<PrintPreviewMessageHandler>(*web_contents),
web_contents_(web_contents) {
DCHECK(web_contents);
}
PrintPreviewMessageHandler::~PrintPreviewMessageHandler() = default;
void PrintPreviewMessageHandler::MetafileReadyForPrinting(
printing::mojom::DidPreviewDocumentParamsPtr params,
int32_t request_id) {
// Always try to stop the worker.
StopWorker(params->document_cookie);
if (params->expected_pages_count == 0) {
RejectPromise(request_id);
return;
}
const base::ReadOnlySharedMemoryRegion& metafile =
params->content->metafile_data_region;
if (printing::IsOopifEnabled()) {
auto* client =
printing::PrintCompositeClient::FromWebContents(web_contents_);
DCHECK(client);
auto callback = base::BindOnce(
&PrintPreviewMessageHandler::OnCompositeDocumentToPdfDone,
weak_ptr_factory_.GetWeakPtr(), request_id);
client->DoCompleteDocumentToPdf(
params->document_cookie, params->expected_pages_count,
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
std::move(callback),
printing::mojom::PrintCompositor::Status::kCompositingFailure,
base::ReadOnlySharedMemoryRegion()));
} else {
ResolvePromise(
request_id,
base::RefCountedSharedMemoryMapping::CreateFromWholeRegion(metafile));
}
}
void PrintPreviewMessageHandler::OnPrepareForDocumentToPdfDone(
int32_t request_id,
printing::mojom::PrintCompositor::Status status) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (status != printing::mojom::PrintCompositor::Status::kSuccess) {
LOG(ERROR) << "Preparing document for pdf failed with error " << status;
}
}
void PrintPreviewMessageHandler::DidPrepareDocumentForPreview(
int32_t document_cookie,
int32_t request_id) {
if (printing::IsOopifEnabled()) {
auto* client =
printing::PrintCompositeClient::FromWebContents(web_contents_);
DCHECK(client);
if (client->GetIsDocumentConcurrentlyComposited(document_cookie))
return;
auto* focused_frame = web_contents_->GetFocusedFrame();
auto* rfh = focused_frame && focused_frame->HasSelection()
? focused_frame
: web_contents_->GetPrimaryMainFrame();
client->DoPrepareForDocumentToPdf(
document_cookie, rfh,
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
base::BindOnce(
&PrintPreviewMessageHandler::OnPrepareForDocumentToPdfDone,
weak_ptr_factory_.GetWeakPtr(), request_id),
printing::mojom::PrintCompositor::Status::kCompositingFailure));
}
}
void PrintPreviewMessageHandler::OnCompositeDocumentToPdfDone(
int32_t request_id,
printing::mojom::PrintCompositor::Status status,
base::ReadOnlySharedMemoryRegion region) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (status != printing::mojom::PrintCompositor::Status::kSuccess) {
LOG(ERROR) << "Compositing pdf failed with error " << status;
RejectPromise(request_id);
return;
}
ResolvePromise(
request_id,
base::RefCountedSharedMemoryMapping::CreateFromWholeRegion(region));
}
void PrintPreviewMessageHandler::OnCompositePdfPageDone(
int page_number,
int document_cookie,
int32_t request_id,
printing::mojom::PrintCompositor::Status status,
base::ReadOnlySharedMemoryRegion region) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (status != printing::mojom::PrintCompositor::Status::kSuccess) {
LOG(ERROR) << "Compositing pdf failed on page: " << page_number
<< " with error: " << status;
}
}
void PrintPreviewMessageHandler::DidPreviewPage(
printing::mojom::DidPreviewPageParamsPtr params,
int32_t request_id) {
int page_number = params->page_number;
const printing::mojom::DidPrintContentParams& content = *(params->content);
if (page_number < printing::FIRST_PAGE_INDEX ||
!content.metafile_data_region.IsValid()) {
RejectPromise(request_id);
return;
}
if (printing::IsOopifEnabled()) {
auto* client =
printing::PrintCompositeClient::FromWebContents(web_contents_);
DCHECK(client);
auto* focused_frame = web_contents_->GetFocusedFrame();
auto* rfh = focused_frame && focused_frame->HasSelection()
? focused_frame
: web_contents_->GetPrimaryMainFrame();
// Use utility process to convert skia metafile to pdf.
client->DoCompositePageToPdf(
params->document_cookie, rfh, content,
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
base::BindOnce(&PrintPreviewMessageHandler::OnCompositePdfPageDone,
weak_ptr_factory_.GetWeakPtr(), page_number,
params->document_cookie, request_id),
printing::mojom::PrintCompositor::Status::kCompositingFailure,
base::ReadOnlySharedMemoryRegion()));
}
}
void PrintPreviewMessageHandler::PrintPreviewFailed(int32_t document_cookie,
int32_t request_id) {
StopWorker(document_cookie);
RejectPromise(request_id);
}
void PrintPreviewMessageHandler::PrintPreviewCancelled(int32_t document_cookie,
int32_t request_id) {
StopWorker(document_cookie);
RejectPromise(request_id);
}
void PrintPreviewMessageHandler::PrintToPDF(
base::Value::Dict options,
gin_helper::Promise<v8::Local<v8::Value>> promise) {
int request_id;
options.Get(printing::kPreviewRequestID, &request_id);
promise_map_.emplace(request_id, std::move(promise));
auto* focused_frame = web_contents_->GetFocusedFrame();
auto* rfh = focused_frame && focused_frame->HasSelection()
? focused_frame
: web_contents_->GetPrimaryMainFrame();
if (!print_render_frame_.is_bound()) {
rfh->GetRemoteAssociatedInterfaces()->GetInterface(&print_render_frame_);
}
if (!receiver_.is_bound()) {
print_render_frame_->SetPrintPreviewUI(
receiver_.BindNewEndpointAndPassRemote());
}
print_render_frame_->PrintPreview(options.GetDict().Clone());
}
gin_helper::Promise<v8::Local<v8::Value>>
PrintPreviewMessageHandler::GetPromise(int request_id) {
auto it = promise_map_.find(request_id);
DCHECK(it != promise_map_.end());
gin_helper::Promise<v8::Local<v8::Value>> promise = std::move(it->second);
promise_map_.erase(it);
return promise;
}
void PrintPreviewMessageHandler::ResolvePromise(
int request_id,
scoped_refptr<base::RefCountedMemory> data_bytes) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
gin_helper::Promise<v8::Local<v8::Value>> promise = GetPromise(request_id);
v8::Isolate* isolate = promise.isolate();
v8::HandleScope handle_scope(isolate);
v8::Context::Scope context_scope(
v8::Local<v8::Context>::New(isolate, promise.GetContext()));
v8::Local<v8::Value> buffer =
node::Buffer::Copy(isolate,
reinterpret_cast<const char*>(data_bytes->front()),
data_bytes->size())
.ToLocalChecked();
promise.Resolve(buffer);
}
void PrintPreviewMessageHandler::RejectPromise(int request_id) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
gin_helper::Promise<v8::Local<v8::Value>> promise = GetPromise(request_id);
promise.RejectWithErrorMessage("Failed to generate PDF");
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(PrintPreviewMessageHandler);
} // namespace electron