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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.
#ifndef CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_
#define CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_
#include "base/scoped_ptr.h"
#include "base/ref_counted.h"
#include "chrome/browser/printing/print_job_worker_owner.h"
class CancelableTask;
class MessageLoop;
class Thread;
namespace printing {
class PrintJobWorker;
// Query the printer for settings.
class PrinterQuery : public base::RefCountedThreadSafe<PrinterQuery>,
public PrintJobWorkerOwner {
public:
// GetSettings() UI parameter.
enum GetSettingsAskParam {
DEFAULTS,
ASK_USER,
};
PrinterQuery();
virtual ~PrinterQuery();
// PrintJobWorkerOwner
virtual void AddRef() {
return base::RefCountedThreadSafe<PrinterQuery>::AddRef();
}
virtual void Release() {
return base::RefCountedThreadSafe<PrinterQuery>::Release();
}
virtual void GetSettingsDone(const PrintSettings& new_settings,
PrintingContext::Result result);
virtual PrintJobWorker* DetachWorker(PrintJobWorkerOwner* new_owner);
virtual MessageLoop* message_loop() {
return ui_message_loop_;
}
virtual const PrintSettings& settings() const { return settings_; }
virtual int cookie() const { return cookie_; }
// Initializes the printing context. It is fine to call this function multiple
// times to reinitialize the settings. |parent_window| parameter will be the
// owner of the print setting dialog box. It is unused when
// |ask_for_user_settings| is DEFAULTS.
void GetSettings(GetSettingsAskParam ask_user_for_settings,
HWND parent_window,
int expected_page_count,
CancelableTask* callback);
// Stops the worker thread since the client is done with this object.
void StopWorker();
// Returns true if the Print... dialog box is currently displayed.
bool is_print_dialog_box_shown() const;
// Returns true if a GetSettings() call is pending completion.
bool is_callback_pending() const;
PrintingContext::Result last_status() const { return last_status_; }
// Returns if a worker thread is still associated to this instance.
bool is_valid() const;
private:
// Main message loop reference. Used to send notifications in the right
// thread.
MessageLoop* const ui_message_loop_;
// All the UI is done in a worker thread because many Win32 print functions
// are blocking and enters a message loop without your consent. There is one
// worker thread per print job.
scoped_ptr<PrintJobWorker> worker_;
// Cache of the print context settings for access in the UI thread.
PrintSettings settings_;
// Is the Print... dialog box currently shown.
bool is_print_dialog_box_shown_;
// Cookie that make this instance unique.
int cookie_;
// Results from the last GetSettingsDone() callback.
PrintingContext::Result last_status_;
// Task waiting to be executed.
scoped_ptr<CancelableTask> callback_;
DISALLOW_COPY_AND_ASSIGN(PrinterQuery);
};
} // namespace printing
#endif // CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_
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