152 lines
4.5 KiB
C++
152 lines
4.5 KiB
C++
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef _PRINTING_WIN_PRINTING_CONTEXT_H
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#define _PRINTING_WIN_PRINTING_CONTEXT_H
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#include "print_settings.h"
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#include <ocidl.h>
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#include <commdlg.h>
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#include <string>
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#include "base/basictypes.h"
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namespace printing {
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// Describe the user selected printing context for Windows. This includes the
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// OS-dependent UI to ask the user about the print settings. This class directly
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// talk to the printer and manages the document and pages breaks.
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class PrintingContext {
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public:
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// Tri-state result for user behavior-dependent functions.
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enum Result {
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OK,
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CANCEL,
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FAILED,
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};
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PrintingContext();
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~PrintingContext();
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// Asks the user what printer and format should be used to print. Updates the
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// context with the select device settings.
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Result AskUserForSettings(HWND window, int max_pages, bool has_selection);
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// Selects the user's default printer and format. Updates the context with the
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// default device settings.
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Result UseDefaultSettings();
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// Initializes with printer default's settings.
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Result Init();
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// Initializes with predefined settings.
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Result InitWithSettings(const PrintSettings& settings);
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// Reinitializes the settings to uninitialized for object reuse.
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void ResetSettings();
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// Does platform specific setup of the printer before the printing. Signal the
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// printer that a document is about to be spooled.
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// Warning: This function enters a message loop. That may cause side effects
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// like IPC message processing! Some printers have side-effects on this call
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// like virtual printers that ask the user for the path of the saved document;
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// for example a PDF printer.
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Result NewDocument(const CefString& document_name);
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// Starts a new page.
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Result NewPage();
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// Closes the printed page.
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Result PageDone();
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// Closes the printing job. After this call the object is ready to start a new
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// document.
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Result DocumentDone();
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// Cancels printing. Can be used in a multithreaded context. Takes effect
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// immediately.
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void Cancel();
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// Dismiss the Print... dialog box if shown.
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void DismissDialog();
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HDC context() {
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return hdc_;
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}
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const PrintSettings& settings() const {
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return settings_;
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}
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private:
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// Class that manages the PrintDlgEx() callbacks. This is meant to be a
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// temporary object used during the Print... dialog display.
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class CallbackHandler;
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// Does bookkeeping when an error occurs.
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PrintingContext::Result OnError();
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// Used in response to the user canceling the printing.
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static BOOL CALLBACK AbortProc(HDC hdc, int nCode);
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// Reads the settings from the selected device context. Updates settings_ and
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// its margins.
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bool InitializeSettings(const DEVMODE& dev_mode,
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const CefString& new_device_name,
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const PRINTPAGERANGE* ranges,
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int number_ranges,
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bool selection_only,
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bool to_file);
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// Retrieves the printer's default low-level settings. hdc_ is allocated with
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// this call.
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bool GetPrinterSettings(HANDLE printer,
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const CefString& device_name,
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bool adjust_dev_mode);
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// Allocates the HDC for a specific DEVMODE.
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bool AllocateContext(const CefString& printer_name,
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const DEVMODE* dev_mode);
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// Updates printer dev_mode with settings_
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void PrintingContext::AdjustDevMode(DEVMODE& dev_mode);
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// Initializes the hdc_ either with setting_ or with just printer defaults.
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Result Init(const CefString& device_name, bool adjust_dev_mode);
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// Parses the result of a PRINTDLGEX result.
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Result ParseDialogResultEx(const PRINTDLGEX& dialog_options);
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Result ParseDialogResult(const PRINTDLG& dialog_options);
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// The selected printer context.
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HDC hdc_;
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// Complete print context settings.
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PrintSettings settings_;
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#ifndef NDEBUG
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// Current page number in the print job.
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int page_number_;
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#endif
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// The dialog box for the time it is shown.
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volatile HWND dialog_box_;
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// The dialog box has been dismissed.
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volatile bool dialog_box_dismissed_;
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// Is a print job being done.
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volatile bool in_print_job_;
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// Did the user cancel the print job.
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volatile bool abort_printing_;
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DISALLOW_EVIL_CONSTRUCTORS(PrintingContext);
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};
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} // namespace printing
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#endif // _PRINTING_WIN_PRINTING_CONTEXT_H
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