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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "chrome/browser/printing/printer_query.h"
#include "base/message_loop.h"
#include "chrome/browser/printing/print_job_worker.h"
#ifdef _MSC_VER
#pragma warning(disable:4355) // 'this' : used in base member initializer list
#endif
namespace printing {
PrinterQuery::PrinterQuery()
: ui_message_loop_(MessageLoop::current()),
worker_(new PrintJobWorker(this)),
is_print_dialog_box_shown_(false),
last_status_(PrintingContext::FAILED),
cookie_(PrintSettings::NewCookie()) {
}
PrinterQuery::~PrinterQuery() {
// The job should be finished (or at least canceled) when it is destroyed.
DCHECK(!is_print_dialog_box_shown_);
// If this fires, it is that this pending printer context has leaked.
DCHECK(!worker_.get());
if (callback_.get()) {
// Be sure to cancel it.
callback_->Cancel();
}
// It may get deleted in a different thread that the one that created it.
// That's fine so don't DCHECK_EQ(ui_message_loop_, MessageLoop::current());
}
void PrinterQuery::GetSettingsDone(const PrintSettings& new_settings,
PrintingContext::Result result) {
is_print_dialog_box_shown_ = false;
last_status_ = result;
if (result != PrintingContext::FAILED) {
settings_ = new_settings;
cookie_ = PrintSettings::NewCookie();
} else {
// Failure.
cookie_ = 0;
}
if (callback_.get()) {
// This may cause reentrancy like to call StopWorker().
callback_->Run();
callback_.reset(NULL);
}
}
PrintJobWorker* PrinterQuery::DetachWorker(PrintJobWorkerOwner* new_owner) {
DCHECK(!callback_.get());
DCHECK(worker_.get());
if (!worker_.get())
return NULL;
worker_->SetNewOwner(new_owner);
return worker_.release();
}
void PrinterQuery::GetSettings(GetSettingsAskParam ask_user_for_settings,
HWND parent_window,
int expected_page_count,
CancelableTask* callback) {
DCHECK_EQ(ui_message_loop_, MessageLoop::current());
DCHECK(!is_print_dialog_box_shown_);
DCHECK(!callback_.get());
DCHECK(worker_.get());
if (!worker_.get())
return;
// Lazy create the worker thread. There is one worker thread per print job.
if (!worker_->message_loop()) {
if (!worker_->Start()) {
if (callback) {
callback->Cancel();
delete callback;
}
NOTREACHED();
return;
}
}
callback_.reset(callback);
// Real work is done in PrintJobWorker::Init().
is_print_dialog_box_shown_ = ask_user_for_settings == ASK_USER;
worker_->message_loop()->PostTask(FROM_HERE, NewRunnableMethod(
worker_.get(),
&PrintJobWorker::GetSettings,
is_print_dialog_box_shown_,
parent_window,
expected_page_count));
}
void PrinterQuery::StopWorker() {
if (worker_.get()) {
worker_->Stop();
worker_.reset();
}
}
bool PrinterQuery::is_print_dialog_box_shown() const {
return is_print_dialog_box_shown_;
}
bool PrinterQuery::is_callback_pending() const {
return callback_.get() != NULL;
}
bool PrinterQuery::is_valid() const {
return worker_.get() != NULL;
}
} // namespace printing
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