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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/printing/web_printer.h"
#include <limits>
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_web_print_document_description.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_web_print_job_template_attributes.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_web_printer_attributes.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_web_printing_media_collection_requested.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_web_printing_media_size_requested.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_web_printing_resolution.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/fileapi/blob.h"
#include "third_party/blink/renderer/modules/printing/web_print_job.h"
#include "third_party/blink/renderer/modules/printing/web_printing_type_converters.h"
#include "third_party/blink/renderer/platform/bindings/exception_code.h"
namespace blink {
namespace {
constexpr char kUserPermissionDeniedError[] =
"User denied access to Web Printing API.";
constexpr char kPrinterUnreachableError[] = "Unable to connect to the printer.";
bool IsPositiveInt32(uint32_t value) {
return value > 0 && value <= std::numeric_limits<int32_t>::max();
}
bool ValidatePrintJobTemplateAttributes(
const WebPrintJobTemplateAttributes* pjt_attributes,
ExceptionState& exception_state) {
if (pjt_attributes->hasCopies() && pjt_attributes->copies() < 1) {
exception_state.ThrowTypeError("|copies| cannot be less than 1.");
return false;
}
if (pjt_attributes->hasPrinterResolution()) {
auto* printer_resolution = pjt_attributes->printerResolution();
if (!printer_resolution->hasCrossFeedDirectionResolution() ||
!printer_resolution->hasFeedDirectionResolution()) {
exception_state.ThrowTypeError(
"crossFeedDirectionResolution and feedDirectionResolution must be "
"specified if printerResolution is present.");
return false;
}
if (printer_resolution->crossFeedDirectionResolution() == 0 ||
printer_resolution->feedDirectionResolution() == 0) {
exception_state.ThrowTypeError(
"crossFeedDirectionResolution and feedDirectionResolution must be "
"greater than 0 if specified.");
return false;
}
}
if (pjt_attributes->hasMediaCol()) {
const auto& media_col = *pjt_attributes->mediaCol();
const auto& media_size = *media_col.mediaSize();
if (!IsPositiveInt32(media_size.yDimension()) ||
!IsPositiveInt32(media_size.xDimension())) {
exception_state.ThrowTypeError(
"Both `xDimension` and `yDimension` must be positive integer "
"values.");
return false;
}
}
return true;
}
} // namespace
WebPrinter::WebPrinter(ExecutionContext* execution_context,
mojom::blink::WebPrinterInfoPtr printer_info)
: printer_(execution_context) {
printer_.Bind(std::move(printer_info->printer_remote),
execution_context->GetTaskRunner(TaskType::kMiscPlatformAPI));
attributes_ = WebPrinterAttributes::Create();
attributes_->setPrinterName(printer_info->printer_name);
}
WebPrinter::~WebPrinter() = default;
void WebPrinter::Trace(Visitor* visitor) const {
visitor->Trace(attributes_);
visitor->Trace(fetch_attributes_resolver_);
visitor->Trace(printer_);
ScriptWrappable::Trace(visitor);
}
ScriptPromise<WebPrinterAttributes> WebPrinter::fetchAttributes(
ScriptState* script_state,
ExceptionState& exception_state) {
if (!script_state->ContextIsValid()) {
exception_state.ThrowDOMException(DOMExceptionCode::kNotSupportedError,
"Context has shut down.");
return EmptyPromise();
}
if (fetch_attributes_resolver_) {
exception_state.ThrowDOMException(
DOMExceptionCode::kInvalidStateError,
"A call to fetchAttributes() is already in progress.");
return EmptyPromise();
}
fetch_attributes_resolver_ =
MakeGarbageCollected<ScriptPromiseResolver<WebPrinterAttributes>>(
script_state, exception_state.GetContext());
printer_->FetchAttributes(
fetch_attributes_resolver_->WrapCallbackInScriptScope(
WTF::BindOnce(&WebPrinter::OnFetchAttributes, WrapPersistent(this))));
return fetch_attributes_resolver_->Promise();
}
ScriptPromise<WebPrintJob> WebPrinter::printJob(
ScriptState* script_state,
const String& job_name,
const WebPrintDocumentDescription* document,
const WebPrintJobTemplateAttributes* pjt_attributes,
ExceptionState& exception_state) {
if (!script_state->ContextIsValid()) {
exception_state.ThrowDOMException(DOMExceptionCode::kNotSupportedError,
"Context has shut down.");
return EmptyPromise();
}
if (!ValidatePrintJobTemplateAttributes(pjt_attributes, exception_state)) {
return EmptyPromise();
}
auto attributes =
mojo::ConvertTo<mojom::blink::WebPrintJobTemplateAttributesPtr>(
pjt_attributes);
attributes->job_name = job_name;
auto* resolver = MakeGarbageCollected<ScriptPromiseResolver<WebPrintJob>>(
script_state, exception_state.GetContext());
printer_->Print(document->data()->AsMojoBlob(), std::move(attributes),
resolver->WrapCallbackInScriptScope(WTF::BindOnce(
&WebPrinter::OnPrint, WrapPersistent(this))));
return resolver->Promise();
}
void WebPrinter::OnFetchAttributes(
ScriptPromiseResolver<WebPrinterAttributes>*,
mojom::blink::WebPrinterFetchResultPtr result) {
if (result->is_error()) {
switch (result->get_error()) {
case mojom::blink::WebPrinterFetchError::kPrinterUnreachable:
fetch_attributes_resolver_->RejectWithDOMException(
DOMExceptionCode::kNetworkError, kPrinterUnreachableError);
break;
case mojom::blink::WebPrinterFetchError::kUserPermissionDenied:
fetch_attributes_resolver_->RejectWithDOMException(
DOMExceptionCode::kNotAllowedError, kUserPermissionDeniedError);
break;
}
fetch_attributes_resolver_ = nullptr;
return;
}
auto* new_attributes = mojo::ConvertTo<WebPrinterAttributes*>(
std::move(result->get_printer_attributes()));
new_attributes->setPrinterName(attributes_->printerName());
attributes_ = new_attributes;
fetch_attributes_resolver_->Resolve(attributes_);
fetch_attributes_resolver_ = nullptr;
}
void WebPrinter::OnPrint(ScriptPromiseResolver<WebPrintJob>* resolver,
mojom::blink::WebPrintResultPtr result) {
if (result->is_error()) {
switch (result->get_error()) {
case mojom::blink::WebPrintError::kPrinterUnreachable:
resolver->RejectWithDOMException(DOMExceptionCode::kNetworkError,
kPrinterUnreachableError);
break;
case mojom::blink::WebPrintError::kPrintJobTemplateAttributesMismatch:
resolver->RejectWithDOMException(
DOMExceptionCode::kDataError,
"The requested WebPrintJobTemplateAttributes do not align with the "
"printer capabilities.");
break;
case mojom::blink::WebPrintError::kDocumentMalformed:
resolver->RejectWithDOMException(DOMExceptionCode::kDataError,
"The provided `data` is malformed.");
break;
case mojom::blink::WebPrintError::kUserPermissionDenied:
resolver->RejectWithDOMException(DOMExceptionCode::kNotAllowedError,
kUserPermissionDeniedError);
break;
}
return;
}
auto* print_job = MakeGarbageCollected<WebPrintJob>(
resolver->GetExecutionContext(), std::move(result->get_print_job_info()));
resolver->Resolve(print_job);
}
} // namespace blink
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