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// Copyright 2024 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/chromeos/printing/print_preview/print_preview_ui_wrapper.h"
#include "base/containers/flat_map.h"
#include "base/containers/id_map.h"
#include "base/lazy_instance.h"
#include "base/no_destructor.h"
#include "base/unguessable_token.h"
#include "base/values.h"
#include "components/printing/common/print.mojom.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "printing/print_job_constants.h"
#include "third_party/blink/public/common/associated_interfaces/associated_interface_provider.h"
namespace chromeos {
namespace {
// IDMap instance for this particular instance.
base::LazyInstance<base::IDMap<PrintPreviewUiWrapper*>>::DestructorAtExit
g_print_preview_ui_id_map = LAZY_INSTANCE_INITIALIZER;
// Mapping from PrintPreviewUI ID to print preview request ID.
// This mapping is used in static accessors to track which print preview
// instance is available and which requests are associated with it.
// It's possible that a print preview instance is destroyed by the time
// preview generation is completed, so this also serves as a way to keep track
// of the available instances.
using PrintPreviewRequestIdMap = base::flat_map<int, int>;
PrintPreviewRequestIdMap& GetPrintPreviewRequestIdMap() {
static base::NoDestructor<PrintPreviewRequestIdMap> map;
return *map;
}
} // namespace
PrintPreviewUiWrapper::PrintPreviewUiWrapper() {
SetPreviewUIId();
}
// Clean up of member variables should be done via Reset() prior to destruction.
PrintPreviewUiWrapper::~PrintPreviewUiWrapper() = default;
void PrintPreviewUiWrapper::Reset() {
render_frame_host_ = nullptr;
receiver_.reset();
print_render_frame_.reset();
if (!id_) {
// `id_` can be empty if no preview generation was requested.
return;
}
g_print_preview_ui_id_map.Get().Remove(*id_);
GetPrintPreviewRequestIdMap().erase(*id_);
}
void PrintPreviewUiWrapper::BindPrintPreviewUI(content::RenderFrameHost* rfh) {
CHECK(!render_frame_host_);
render_frame_host_ = rfh;
if (!print_render_frame_.is_bound()) {
render_frame_host_->GetRemoteAssociatedInterfaces()->GetInterface(
&print_render_frame_);
}
if (!receiver_.is_bound()) {
print_render_frame_->SetPrintPreviewUI(
receiver_.BindNewEndpointAndPassRemote());
}
}
// static
bool PrintPreviewUiWrapper::ShouldCancelRequest(
const std::optional<int32_t>& print_preview_ui_id,
int request_id) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// A null `print_preview_ui_id` indicates that the preview request for the
// associated ID is not in progress and can be cancelled.
if (!print_preview_ui_id) {
return true;
}
auto& map = GetPrintPreviewRequestIdMap();
auto it = map.find(*print_preview_ui_id);
return it == map.end() || request_id != it->second;
}
void PrintPreviewUiWrapper::GeneratePrintPreview(base::Value::Dict settings) {
CHECK(print_render_frame_.is_bound());
// TODO(jimmyxgong): Store settings for sticky settings support.
// Store the request ID.
const int request_id = settings.FindInt(printing::kPreviewRequestID).value();
GetPrintPreviewRequestIdMap()[*id_] = request_id;
print_render_frame_->PrintPreview(settings.Clone());
}
// TODO(jimmyxgong): Implement stub.
void PrintPreviewUiWrapper::SetOptionsFromDocument(
::printing::mojom::OptionsFromDocumentParamsPtr params,
int32_t request_id) {}
void PrintPreviewUiWrapper::DidPrepareDocumentForPreview(
int32_t document_cookie,
int32_t request_id) {}
void PrintPreviewUiWrapper::DidPreviewPage(
::printing::mojom::DidPreviewPageParamsPtr params,
int32_t request_id) {}
void PrintPreviewUiWrapper::MetafileReadyForPrinting(
::printing::mojom::DidPreviewDocumentParamsPtr params,
int32_t request_id) {}
void PrintPreviewUiWrapper::PrintPreviewFailed(int32_t document_cookie,
int32_t request_id) {}
void PrintPreviewUiWrapper::PrintPreviewCancelled(int32_t document_cookie,
int32_t request_id) {}
void PrintPreviewUiWrapper::PrinterSettingsInvalid(int32_t document_cookie,
int32_t request_id) {}
void PrintPreviewUiWrapper::DidGetDefaultPageLayout(
::printing::mojom::PageSizeMarginsPtr page_layout_in_points,
const gfx::RectF& printable_area_in_points,
bool all_pages_have_custom_size,
bool all_pages_have_custom_orientation,
int32_t request_id) {}
void PrintPreviewUiWrapper::DidStartPreview(
::printing::mojom::DidStartPreviewParamsPtr params,
int32_t request_id) {}
void PrintPreviewUiWrapper::SetPreviewUIId() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
CHECK(!id_);
id_ = g_print_preview_ui_id_map.Get().Add(this);
GetPrintPreviewRequestIdMap()[*id_] = -1;
}
} // namespace chromeos
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