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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_print_job.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_web_print_job_attributes.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_web_print_job_state.h"
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/event_target_names.h"
#include "third_party/blink/renderer/core/event_type_names.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/modules/printing/web_printing_type_converters.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
namespace blink {
namespace {
using V8JobStateEnum = V8WebPrintJobState::Enum;
bool AreFurtherStateUpdatesPossible(V8JobStateEnum state) {
switch (state) {
case V8JobStateEnum::kCompleted:
case V8JobStateEnum::kAborted:
case V8JobStateEnum::kCanceled:
// These states are terminal -- no more updates from the browser.
return false;
case V8JobStateEnum::kPreliminary:
case V8JobStateEnum::kPending:
case V8JobStateEnum::kProcessing:
return true;
}
}
} // namespace
WebPrintJob::WebPrintJob(ExecutionContext* execution_context,
mojom::blink::WebPrintJobInfoPtr print_job_info)
: ActiveScriptWrappable<WebPrintJob>({}),
ExecutionContextClient(execution_context),
attributes_(MakeGarbageCollected<WebPrintJobAttributes>()),
observer_(this, execution_context),
controller_(execution_context) {
attributes_->setJobName(print_job_info->job_name);
attributes_->setJobPages(print_job_info->job_pages);
attributes_->setJobPagesCompleted(0);
attributes_->setJobState(V8JobStateEnum::kPreliminary);
observer_.Bind(std::move(print_job_info->observer),
execution_context->GetTaskRunner(TaskType::kMiscPlatformAPI));
controller_.Bind(
std::move(print_job_info->controller),
execution_context->GetTaskRunner(TaskType::kMiscPlatformAPI));
}
WebPrintJob::~WebPrintJob() = default;
void WebPrintJob::cancel() {
// There's no sense in cancelling a job that has either already been cancelled
// or is in a terminal state.
if (cancel_called_ ||
!AreFurtherStateUpdatesPossible(attributes_->jobState().AsEnum())) {
return;
}
cancel_called_ = true;
controller_->Cancel();
}
ExecutionContext* WebPrintJob::GetExecutionContext() const {
return ExecutionContextClient::GetExecutionContext();
}
const AtomicString& WebPrintJob::InterfaceName() const {
return event_target_names::kWebPrintJob;
}
void WebPrintJob::OnWebPrintJobUpdate(
mojom::blink::WebPrintJobUpdatePtr update) {
auto state = mojo::ConvertTo<V8JobStateEnum>(update->state);
// Discard the update if nothing has actually changed.
if (state == attributes_->jobState().AsEnum() &&
update->pages_printed == attributes_->jobPagesCompleted()) {
return;
}
attributes_->setJobState(state);
attributes_->setJobPagesCompleted(update->pages_printed);
DispatchEvent(*Event::Create(event_type_names::kJobstatechange));
}
bool WebPrintJob::HasPendingActivity() const {
// The job is kept alive for as long as there are more updates to be reported
// and at least one listener to catch them.
return AreFurtherStateUpdatesPossible(attributes_->jobState().AsEnum()) &&
HasEventListeners();
}
void WebPrintJob::Trace(Visitor* visitor) const {
visitor->Trace(attributes_);
visitor->Trace(observer_);
visitor->Trace(controller_);
ExecutionContextClient::Trace(visitor);
EventTarget::Trace(visitor);
}
} // namespace blink
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