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 #include "ui/shell_dialogs/print_settings_dialog_win.h"
  18
  19 namespace printing {
  20
  21 class PRINTING_EXPORT PrintingContextWin
  22     : public PrintingContext,
  23       public ui::PrintSettingsDialogWin::Observer {
  24  public:
  25   explicit PrintingContextWin(const std::string& app_locale);
  26   ~PrintingContextWin();
  27
  28   // PrintingContext implementation.
  29   virtual void AskUserForSettings(
  30       gfx::NativeView parent_view,
  31       int max_pages,
  32       bool has_selection,
  33       const PrintSettingsCallback& callback) OVERRIDE;
  34   virtual Result UseDefaultSettings() OVERRIDE;
  35   virtual gfx::Size GetPdfPaperSizeDeviceUnits() OVERRIDE;
  36   virtual Result UpdatePrinterSettings(bool external_preview) OVERRIDE;
  37   virtual Result InitWithSettings(const PrintSettings& settings) OVERRIDE;
  38   virtual Result NewDocument(const base::string16& document_name) OVERRIDE;
  39   virtual Result NewPage() OVERRIDE;
  40   virtual Result PageDone() OVERRIDE;
  41   virtual Result DocumentDone() OVERRIDE;
  42   virtual void Cancel() OVERRIDE;
  43   virtual void ReleaseContext() OVERRIDE;
  44   virtual gfx::NativeDrawingContext context() const OVERRIDE;
  45
  46   // PrintSettingsDialogWin::Observer implementation:
  47   virtual void PrintSettingsConfirmed(PRINTDLGEX* dialog_options) OVERRIDE;
  48   virtual void PrintSettingsCancelled(PRINTDLGEX* dialog_options) OVERRIDE;
  49
  50 #if defined(UNIT_TEST) || defined(PRINTING_IMPLEMENTATION)
  51   // Sets a fake PrintDlgEx function pointer in tests.
  52   void SetPrintDialog(HRESULT (__stdcall *print_dialog_func)(LPPRINTDLGEX)) {
  53     print_dialog_func_ = print_dialog_func;
  54   }
  55 #endif  // defined(UNIT_TEST)
  56
  57   // Allocates the HDC for a specific DEVMODE.
  58   static bool AllocateContext(const std::wstring& printer_name,
  59                               const DEVMODE* dev_mode,
  60                               gfx::NativeDrawingContext* context);
  61
  62  private:
  63   // Class that manages the PrintDlgEx() callbacks. This is meant to be a
  64   // temporary object used during the Print... dialog display.
  65   class CallbackHandler;
  66
  67   // Used in response to the user canceling the printing.
  68   static BOOL CALLBACK AbortProc(HDC hdc, int nCode);
  69
  70   // Reads the settings from the selected device context. Updates settings_ and
  71   // its margins.
  72   bool InitializeSettings(const DEVMODE& dev_mode,
  73                           const std::wstring& new_device_name,
  74                           const PRINTPAGERANGE* ranges,
  75                           int number_ranges,
  76                           bool selection_only);
  77
  78   // Retrieves the printer's default low-level settings. On Windows, context_ is
  79   // allocated with this call.
  80   bool GetPrinterSettings(HANDLE printer,
  81                           const std::wstring& device_name);
  82
  83   // Parses the result of a PRINTDLGEX result.
  84   Result ParseDialogResultEx(const PRINTDLGEX& dialog_options);
  85   Result ParseDialogResult(const PRINTDLG& dialog_options);
  86
  87   // The selected printer context.
  88   HDC context_;
  89
  90   // The dialog box for the time it is shown.
  91   volatile HWND dialog_box_;
  92
  93   // Function pointer that defaults to PrintDlgEx. It can be changed using
  94   // SetPrintDialog() in tests.
  95   HRESULT (__stdcall *print_dialog_func_)(LPPRINTDLGEX);
  96
  97   // Where to notify when the dialog is closed.
  98   PrintSettingsCallback callback_;
  99
 100   // Wrapper around native print dialog that runs it on a background thread.
 101   scoped_refptr<ui::PrintSettingsDialogWin> print_settings_dialog_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(PrintingContextWin);
 104 };
 105
 106 }  // namespace printing
 107
 108 #endif  // PRINTING_PRINTING_CONTEXT_WIN_H_