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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef PRINTING_PRINTING_CONTEXT_WIN_H_
      6 #define PRINTING_PRINTING_CONTEXT_WIN_H_
      7 
      8 #include <ocidl.h>
      9 #include <commdlg.h>
     10 
     11 #include <string>
     12 
     13 #include "base/memory/scoped_ptr.h"
     14 #include "build/build_config.h"
     15 #include "printing/printing_context.h"
     16 #include "ui/gfx/native_widget_types.h"
     17 
     18 namespace printing {
     19 
     20 class PRINTING_EXPORT PrintingContextWin : public PrintingContext {
     21  public:
     22   explicit PrintingContextWin(const std::string& app_locale);
     23   ~PrintingContextWin();
     24 
     25   // PrintingContext implementation.
     26   virtual void AskUserForSettings(
     27       gfx::NativeView parent_view,
     28       int max_pages,
     29       bool has_selection,
     30       const PrintSettingsCallback& callback) OVERRIDE;
     31   virtual Result UseDefaultSettings() OVERRIDE;
     32   virtual gfx::Size GetPdfPaperSizeDeviceUnits() OVERRIDE;
     33   virtual Result UpdatePrinterSettings(bool external_preview) OVERRIDE;
     34   virtual Result InitWithSettings(const PrintSettings& settings) OVERRIDE;
     35   virtual Result NewDocument(const base::string16& document_name) OVERRIDE;
     36   virtual Result NewPage() OVERRIDE;
     37   virtual Result PageDone() OVERRIDE;
     38   virtual Result DocumentDone() OVERRIDE;
     39   virtual void Cancel() OVERRIDE;
     40   virtual void ReleaseContext() OVERRIDE;
     41   virtual gfx::NativeDrawingContext context() const OVERRIDE;
     42 
     43   // Allocates the HDC for a specific DEVMODE.
     44   static bool AllocateContext(const std::wstring& printer_name,
     45                               const DEVMODE* dev_mode,
     46                               gfx::NativeDrawingContext* context);
     47 
     48  protected:
     49   virtual HRESULT ShowPrintDialog(PRINTDLGEX* options);
     50 
     51  private:
     52   // Class that manages the PrintDlgEx() callbacks. This is meant to be a
     53   // temporary object used during the Print... dialog display.
     54   class CallbackHandler;
     55 
     56   // Used in response to the user canceling the printing.
     57   static BOOL CALLBACK AbortProc(HDC hdc, int nCode);
     58 
     59   // Reads the settings from the selected device context. Updates settings_ and
     60   // its margins.
     61   bool InitializeSettings(const DEVMODE& dev_mode,
     62                           const std::wstring& new_device_name,
     63                           const PRINTPAGERANGE* ranges,
     64                           int number_ranges,
     65                           bool selection_only);
     66 
     67   // Retrieves the printer's default low-level settings. On Windows, context_ is
     68   // allocated with this call.
     69   bool GetPrinterSettings(HANDLE printer,
     70                           const std::wstring& device_name);
     71 
     72   // Parses the result of a PRINTDLGEX result.
     73   Result ParseDialogResultEx(const PRINTDLGEX& dialog_options);
     74   Result ParseDialogResult(const PRINTDLG& dialog_options);
     75 
     76   // The selected printer context.
     77   HDC context_;
     78 
     79   // The dialog box for the time it is shown.
     80   volatile HWND dialog_box_;
     81 
     82   DISALLOW_COPY_AND_ASSIGN(PrintingContextWin);
     83 };
     84 
     85 }  // namespace printing
     86 
     87 #endif  // PRINTING_PRINTING_CONTEXT_WIN_H_
     88