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 Result UpdatePrinterSettings(
  33       const base::DictionaryValue& job_settings,
  34       const PageRanges& ranges) OVERRIDE;
  35   virtual Result InitWithSettings(const PrintSettings& settings) OVERRIDE;
  36   virtual Result NewDocument(const string16& document_name) OVERRIDE;
  37   virtual Result NewPage() OVERRIDE;
  38   virtual Result PageDone() OVERRIDE;
  39   virtual Result DocumentDone() OVERRIDE;
  40   virtual void Cancel() OVERRIDE;
  41   virtual void ReleaseContext() OVERRIDE;
  42   virtual gfx::NativeDrawingContext context() const OVERRIDE;
  43
  44 #if defined(UNIT_TEST) || defined(PRINTING_IMPLEMENTATION)
  45   // Sets a fake PrintDlgEx function pointer in tests.
  46   void SetPrintDialog(HRESULT (__stdcall *print_dialog_func)(LPPRINTDLGEX)) {
  47     print_dialog_func_ = print_dialog_func;
  48   }
  49 #endif  // defined(UNIT_TEST)
  50
  51   // Allocates the HDC for a specific DEVMODE.
  52   static bool AllocateContext(const std::wstring& printer_name,
  53                               const DEVMODE* dev_mode,
  54                               gfx::NativeDrawingContext* context);
  55
  56   // Retrieves the content of a GetPrinter call.
  57   static void GetPrinterHelper(HANDLE printer, int level,
  58                                scoped_array<uint8>* buffer);
  59
  60  private:
  61   // Class that manages the PrintDlgEx() callbacks. This is meant to be a
  62   // temporary object used during the Print... dialog display.
  63   class CallbackHandler;
  64
  65   // Used in response to the user canceling the printing.
  66   static BOOL CALLBACK AbortProc(HDC hdc, int nCode);
  67
  68   // Reads the settings from the selected device context. Updates settings_ and
  69   // its margins.
  70   bool InitializeSettings(const DEVMODE& dev_mode,
  71                           const std::wstring& new_device_name,
  72                           const PRINTPAGERANGE* ranges,
  73                           int number_ranges,
  74                           bool selection_only);
  75
  76   // Retrieves the printer's default low-level settings. On Windows, context_ is
  77   // allocated with this call.
  78   bool GetPrinterSettings(HANDLE printer,
  79                           const std::wstring& device_name);
  80
  81   // Parses the result of a PRINTDLGEX result.
  82   Result ParseDialogResultEx(const PRINTDLGEX& dialog_options);
  83   Result ParseDialogResult(const PRINTDLG& dialog_options);
  84
  85   // The selected printer context.
  86   HDC context_;
  87
  88   // The dialog box for the time it is shown.
  89   volatile HWND dialog_box_;
  90
  91   // Function pointer that defaults to PrintDlgEx. It can be changed using
  92   // SetPrintDialog() in tests.
  93   HRESULT (__stdcall *print_dialog_func_)(LPPRINTDLGEX);
  94
  95   DISALLOW_COPY_AND_ASSIGN(PrintingContextWin);
  96 };
  97
  98 }  // namespace printing
  99
 100 #endif  // PRINTING_PRINTING_CONTEXT_WIN_H_