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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_
#define CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_
#include <memory>
#include "base/callback.h"
#include "base/values.h"
#include "build/build_config.h"
#include "printing/mojom/print.mojom.h"
#include "printing/print_settings.h"
#include "printing/printing_context.h"
namespace base {
class Location;
}
namespace content {
struct GlobalRenderFrameHostId;
}
namespace printing {
class PrintJobWorker;
using CreatePrintJobWorkerCallback =
base::RepeatingCallback<std::unique_ptr<PrintJobWorker>(
content::GlobalRenderFrameHostId rfh_id)>;
// Query the printer for settings. All code in this class runs in the UI
// thread.
class PrinterQuery {
public:
explicit PrinterQuery(content::GlobalRenderFrameHostId rfh_id);
PrinterQuery(const PrinterQuery&) = delete;
PrinterQuery& operator=(const PrinterQuery&) = delete;
virtual ~PrinterQuery();
// Detach the PrintJobWorker associated to this object. Virtual so that tests
// can override.
virtual std::unique_ptr<PrintJobWorker> DetachWorker();
const PrintSettings& settings() const;
std::unique_ptr<PrintSettings> ExtractSettings();
// Initializes the printing context. It is fine to call this function multiple
// times to reinitialize the settings.
// Caller has to ensure that `this` is alive until `callback` is run.
void GetDefaultSettings(base::OnceClosure callback, bool is_modifiable);
void GetSettingsFromUser(uint32_t expected_page_count,
bool has_selection,
mojom::MarginType margin_type,
bool is_scripted,
bool is_modifiable,
base::OnceClosure callback);
// Updates the current settings with `new_settings` dictionary values.
// Caller has to ensure that `this` is alive until `callback` is run.
virtual void SetSettings(base::Value::Dict new_settings,
base::OnceClosure callback);
#if BUILDFLAG(IS_CHROMEOS)
// Updates the current settings with `new_settings`.
// Caller has to ensure that `this` is alive until `callback` is run.
void SetSettingsFromPOD(std::unique_ptr<PrintSettings> new_settings,
base::OnceClosure callback);
#endif
// Stops the worker thread since the client is done with this object.
virtual void StopWorker();
int cookie() const;
mojom::ResultCode last_status() const { return last_status_; }
// Returns if a worker thread is still associated to this instance.
bool is_valid() const;
// Posts the given task to be run.
bool PostTask(const base::Location& from_here, base::OnceClosure task);
// Provide an override for generating worker threads in tests.
static void SetCreatePrintJobWorkerCallbackForTest(
CreatePrintJobWorkerCallback* callback);
protected:
// Virtual so that tests can override.
virtual void GetSettingsDone(base::OnceClosure callback,
absl::optional<bool> maybe_is_modifiable,
std::unique_ptr<PrintSettings> new_settings,
mojom::ResultCode result);
void PostSettingsDone(base::OnceClosure callback,
absl::optional<bool> maybe_is_modifiable,
std::unique_ptr<PrintSettings> new_settings,
mojom::ResultCode result);
void SetSettingsForTest(std::unique_ptr<PrintSettings> settings);
private:
// Lazy create the worker thread. There is one worker thread per print job.
void StartWorker();
// Cache of the print context settings for access in the UI thread.
std::unique_ptr<PrintSettings> settings_;
// Is the Print... dialog box currently shown.
bool is_print_dialog_box_shown_ = false;
// Cookie that make this instance unique.
int cookie_;
// Results from the last GetSettingsDone() callback.
mojom::ResultCode last_status_ = mojom::ResultCode::kFailed;
// 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.
std::unique_ptr<PrintJobWorker> worker_;
};
} // namespace printing
#endif // CHROME_BROWSER_PRINTING_PRINTER_QUERY_H_
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