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 PrintingContextWin : public PrintingContext {
  21  public:
  22   explicit PrintingContextWin(const std::string& app_locale);
  23   ~PrintingContextWin();
  24
  25   // PrintingContext implementation.
  26   virtual void AskUserForSettings(gfx::NativeView parent_view,
  27                                   int max_pages,
  28                                   bool has_selection,
  29                                   PrintSettingsCallback* callback);
  30   virtual Result UseDefaultSettings();
  31   virtual Result UpdatePrintSettings(const base::DictionaryValue& job_settings,
  32                                      const PageRanges& ranges);
  33   virtual Result InitWithSettings(const PrintSettings& settings);
  34   virtual Result NewDocument(const string16& document_name);
  35   virtual Result NewPage();
  36   virtual Result PageDone();
  37   virtual Result DocumentDone();
  38   virtual void Cancel();
  39   virtual void ReleaseContext();
  40   virtual gfx::NativeDrawingContext context() const;
  41
  42 #if defined(UNIT_TEST)
  43   // Sets a fake PrintDlgEx function pointer in tests.
  44   void SetPrintDialog(HRESULT (__stdcall *print_dialog_func)(LPPRINTDLGEX)) {
  45     print_dialog_func_ = print_dialog_func;
  46   }
  47 #endif  // defined(UNIT_TEST)
  48
  49   // Allocates the HDC for a specific DEVMODE.
  50   static bool AllocateContext(const std::wstring& printer_name,
  51                               const DEVMODE* dev_mode,
  52                               gfx::NativeDrawingContext* context);
  53
  54   // Retrieves the content of a GetPrinter call.
  55   static void GetPrinterHelper(HANDLE printer, int level,
  56                                scoped_array<uint8>* buffer);
  57
  58  private:
  59   // Class that manages the PrintDlgEx() callbacks. This is meant to be a
  60   // temporary object used during the Print... dialog display.
  61   class CallbackHandler;
  62
  63   // Used in response to the user canceling the printing.
  64   static BOOL CALLBACK AbortProc(HDC hdc, int nCode);
  65
  66   // Reads the settings from the selected device context. Updates settings_ and
  67   // its margins.
  68   bool InitializeSettings(const DEVMODE& dev_mode,
  69                           const std::wstring& new_device_name,
  70                           const PRINTPAGERANGE* ranges,
  71                           int number_ranges,
  72                           bool selection_only);
  73
  74   // Retrieves the printer's default low-level settings. On Windows, context_ is
  75   // allocated with this call.
  76   bool GetPrinterSettings(HANDLE printer,
  77                           const std::wstring& device_name);
  78
  79   // Parses the result of a PRINTDLGEX result.
  80   Result ParseDialogResultEx(const PRINTDLGEX& dialog_options);
  81   Result ParseDialogResult(const PRINTDLG& dialog_options);
  82
  83   // The selected printer context.
  84   HDC context_;
  85
  86   // The dialog box for the time it is shown.
  87   volatile HWND dialog_box_;
  88
  89   // Function pointer that defaults to PrintDlgEx. It can be changed using
  90   // SetPrintDialog() in tests.
  91   HRESULT (__stdcall *print_dialog_func_)(LPPRINTDLGEX);
  92
  93   DISALLOW_COPY_AND_ASSIGN(PrintingContextWin);
  94 };
  95
  96 }  // namespace printing
  97
  98 #endif  // PRINTING_PRINTING_CONTEXT_WIN_H_