printing/printing_context_win.h

   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_