printing/backend/print_backend_win.cc

   1 // Copyright (c) 2012 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 #include "printing/backend/print_backend.h"
   6
   7 #include <objidl.h>
   8 #include <winspool.h>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/numerics/safe_conversions.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "base/strings/string_piece.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/win/scoped_bstr.h"
  16 #include "base/win/scoped_comptr.h"
  17 #include "base/win/scoped_hglobal.h"
  18 #include "printing/backend/print_backend_consts.h"
  19 #include "printing/backend/printing_info_win.h"
  20 #include "printing/backend/win_helper.h"
  21
  22 namespace printing {
  23
  24 namespace {
  25
  26 HRESULT StreamOnHGlobalToString(IStream* stream, std::string* out) {
  27   DCHECK(stream);
  28   DCHECK(out);
  29   HGLOBAL hdata = NULL;
  30   HRESULT hr = GetHGlobalFromStream(stream, &hdata);
  31   if (SUCCEEDED(hr)) {
  32     DCHECK(hdata);
  33     base::win::ScopedHGlobal<char*> locked_data(hdata);
  34     out->assign(locked_data.release(), locked_data.Size());
  35   }
  36   return hr;
  37 }
  38
  39 template <class T>
  40 void GetDeviceCapabilityArray(const wchar_t* printer,
  41                               const wchar_t* port,
  42                               WORD id,
  43                               std::vector<T>* result) {
  44   int count = DeviceCapabilities(printer, port, id, NULL, NULL);
  45   if (count <= 0)
  46     return;
  47   std::vector<T> tmp;
  48   tmp.resize(count * 2);
  49   count = DeviceCapabilities(printer, port, id,
  50                              reinterpret_cast<LPTSTR>(tmp.data()), NULL);
  51   if (count <= 0)
  52     return;
  53   CHECK_LE(count, base::checked_cast<int>(tmp.size()));
  54   tmp.resize(count);
  55   result->swap(tmp);
  56 }
  57
  58 void LoadPaper(const wchar_t* printer,
  59                const wchar_t* port,
  60                const DEVMODE* devmode,
  61                PrinterSemanticCapsAndDefaults* caps) {
  62   static const size_t kToUm = 100;  // Windows uses 0.1mm.
  63   static const size_t kMaxPaperName = 64;
  64
  65   struct PaperName {
  66     wchar_t chars[kMaxPaperName];
  67   };
  68
  69   DCHECK_EQ(sizeof(PaperName), sizeof(wchar_t) * kMaxPaperName);
  70
  71   // Paper
  72   std::vector<PaperName> names;
  73   GetDeviceCapabilityArray(printer, port, DC_PAPERNAMES, &names);
  74
  75   std::vector<POINT> sizes;
  76   GetDeviceCapabilityArray(printer, port, DC_PAPERSIZE, &sizes);
  77
  78   std::vector<WORD> ids;
  79   GetDeviceCapabilityArray(printer, port, DC_PAPERS, &ids);
  80
  81   DCHECK_EQ(ids.size(), sizes.size());
  82   DCHECK_EQ(names.size(), sizes.size());
  83
  84   if (ids.size() != sizes.size())
  85     ids.clear();
  86   if (names.size() != sizes.size())
  87     names.clear();
  88
  89   for (size_t i = 0; i < sizes.size(); ++i) {
  90     PrinterSemanticCapsAndDefaults::Paper paper;
  91     paper.size_um.SetSize(sizes[i].x * kToUm, sizes[i].y * kToUm);
  92     if (!names.empty()) {
  93       const wchar_t* name_start = names[i].chars;
  94       base::string16 tmp_name(name_start, kMaxPaperName);
  95       // Trim trailing zeros.
  96       tmp_name = tmp_name.c_str();
  97       paper.display_name = base::WideToUTF8(tmp_name);
  98     }
  99     if (!ids.empty())
 100       paper.vendor_id = base::UintToString(ids[i]);
 101     caps->papers.push_back(paper);
 102   }
 103
 104   if (devmode) {
 105     // Copy paper with the same ID as default paper.
 106     if (devmode->dmFields & DM_PAPERSIZE) {
 107       for (size_t i = 0; i < ids.size(); ++i) {
 108         if (ids[i] == devmode->dmPaperSize) {
 109           DCHECK_EQ(ids.size(), caps->papers.size());
 110           caps->default_paper = caps->papers[i];
 111           break;
 112         }
 113       }
 114     }
 115
 116     gfx::Size default_size;
 117     if (devmode->dmFields & DM_PAPERWIDTH)
 118       default_size.set_width(devmode->dmPaperWidth * kToUm);
 119     if (devmode->dmFields & DM_PAPERLENGTH)
 120       default_size.set_height(devmode->dmPaperLength * kToUm);
 121
 122     if (!default_size.IsEmpty()) {
 123       // Reset default paper if |dmPaperWidth| or |dmPaperLength| does not
 124       // match default paper set by.
 125       if (default_size != caps->default_paper.size_um)
 126         caps->default_paper = PrinterSemanticCapsAndDefaults::Paper();
 127       caps->default_paper.size_um = default_size;
 128     }
 129   }
 130 }
 131
 132 void LoadDpi(const wchar_t* printer,
 133              const wchar_t* port,
 134              const DEVMODE* devmode,
 135              PrinterSemanticCapsAndDefaults* caps) {
 136   std::vector<POINT> dpis;
 137   GetDeviceCapabilityArray(printer, port, DC_ENUMRESOLUTIONS, &dpis);
 138
 139   for (size_t i = 0; i < dpis.size() ; ++i)
 140     caps->dpis.push_back(gfx::Size(dpis[i].x, dpis[i].y));
 141
 142   if (devmode) {
 143     if ((devmode->dmFields & DM_PRINTQUALITY) && devmode->dmPrintQuality > 0) {
 144       caps->default_dpi.SetSize(devmode->dmPrintQuality,
 145                                 devmode->dmPrintQuality);
 146       if (devmode->dmFields & DM_YRESOLUTION) {
 147         caps->default_dpi.set_height(devmode->dmYResolution);
 148       }
 149     }
 150   }
 151 }
 152
 153 }  // namespace
 154
 155 class PrintBackendWin : public PrintBackend {
 156  public:
 157   PrintBackendWin() {}
 158
 159   // PrintBackend implementation.
 160   bool EnumeratePrinters(PrinterList* printer_list) override;
 161   std::string GetDefaultPrinterName() override;
 162   bool GetPrinterSemanticCapsAndDefaults(
 163       const std::string& printer_name,
 164       PrinterSemanticCapsAndDefaults* printer_info) override;
 165   bool GetPrinterCapsAndDefaults(
 166       const std::string& printer_name,
 167       PrinterCapsAndDefaults* printer_info) override;
 168   std::string GetPrinterDriverInfo(
 169       const std::string& printer_name) override;
 170   bool IsValidPrinter(const std::string& printer_name) override;
 171
 172  protected:
 173   ~PrintBackendWin() override {}
 174 };
 175
 176 bool PrintBackendWin::EnumeratePrinters(PrinterList* printer_list) {
 177   DCHECK(printer_list);
 178   DWORD bytes_needed = 0;
 179   DWORD count_returned = 0;
 180   const DWORD kLevel = 4;
 181   BOOL ret = EnumPrinters(PRINTER_ENUM_LOCAL|PRINTER_ENUM_CONNECTIONS, NULL,
 182                           kLevel, NULL, 0, &bytes_needed, &count_returned);
 183   if (!bytes_needed)
 184     return false;
 185   scoped_ptr<BYTE[]> printer_info_buffer(new BYTE[bytes_needed]);
 186   ret = EnumPrinters(PRINTER_ENUM_LOCAL|PRINTER_ENUM_CONNECTIONS, NULL, kLevel,
 187                      printer_info_buffer.get(), bytes_needed, &bytes_needed,
 188                      &count_returned);
 189   DCHECK(ret);
 190   if (!ret)
 191     return false;
 192
 193   std::string default_printer = GetDefaultPrinterName();
 194   PRINTER_INFO_4* printer_info =
 195       reinterpret_cast<PRINTER_INFO_4*>(printer_info_buffer.get());
 196   for (DWORD index = 0; index < count_returned; index++) {
 197     ScopedPrinterHandle printer;
 198     PrinterBasicInfo info;
 199     if (printer.OpenPrinter(printer_info[index].pPrinterName) &&
 200         InitBasicPrinterInfo(printer.Get(), &info)) {
 201       info.is_default = (info.printer_name == default_printer);
 202       printer_list->push_back(info);
 203     }
 204   }
 205   return true;
 206 }
 207
 208 std::string PrintBackendWin::GetDefaultPrinterName() {
 209   DWORD size = MAX_PATH;
 210   TCHAR default_printer_name[MAX_PATH];
 211   if (!::GetDefaultPrinter(default_printer_name, &size))
 212     return std::string();
 213   return base::WideToUTF8(default_printer_name);
 214 }
 215
 216 bool PrintBackendWin::GetPrinterSemanticCapsAndDefaults(
 217     const std::string& printer_name,
 218     PrinterSemanticCapsAndDefaults* printer_info) {
 219   ScopedPrinterHandle printer_handle;
 220   if (!printer_handle.OpenPrinter(base::UTF8ToWide(printer_name).c_str())) {
 221     LOG(WARNING) << "Failed to open printer, error = " << GetLastError();
 222     return false;
 223   }
 224
 225   PrinterInfo5 info_5;
 226   if (!info_5.Init(printer_handle.Get()))
 227     return false;
 228   const wchar_t* name = info_5.get()->pPrinterName;
 229   const wchar_t* port = info_5.get()->pPortName;
 230   DCHECK_EQ(name, base::UTF8ToUTF16(printer_name));
 231
 232   PrinterSemanticCapsAndDefaults caps;
 233
 234   scoped_ptr<DEVMODE, base::FreeDeleter> user_settings =
 235       CreateDevMode(printer_handle.Get(), NULL);
 236   if (user_settings) {
 237     if (user_settings->dmFields & DM_COLOR)
 238       caps.color_default = (user_settings->dmColor == DMCOLOR_COLOR);
 239
 240     if (user_settings->dmFields & DM_DUPLEX) {
 241       switch (user_settings->dmDuplex) {
 242       case DMDUP_SIMPLEX:
 243         caps.duplex_default = SIMPLEX;
 244         break;
 245       case DMDUP_VERTICAL:
 246         caps.duplex_default = LONG_EDGE;
 247         break;
 248       case DMDUP_HORIZONTAL:
 249         caps.duplex_default = SHORT_EDGE;
 250         break;
 251       default:
 252         NOTREACHED();
 253       }
 254     }
 255
 256     if (user_settings->dmFields & DM_COLLATE)
 257       caps.collate_default = (user_settings->dmCollate == DMCOLLATE_TRUE);
 258   } else {
 259     LOG(WARNING) << "Fallback to color/simplex mode.";
 260     caps.color_default = caps.color_changeable;
 261     caps.duplex_default = SIMPLEX;
 262   }
 263
 264   // Get printer capabilities. For more info see here:
 265   // http://msdn.microsoft.com/en-us/library/windows/desktop/dd183552(v=vs.85).aspx
 266   caps.color_changeable =
 267       (DeviceCapabilities(name, port, DC_COLORDEVICE, NULL, NULL) == 1);
 268   caps.color_model = printing::COLOR;
 269   caps.bw_model = printing::GRAY;
 270
 271   caps.duplex_capable =
 272       (DeviceCapabilities(name, port, DC_DUPLEX, NULL, NULL) == 1);
 273
 274   caps.collate_capable =
 275       (DeviceCapabilities(name, port, DC_COLLATE, NULL, NULL) == 1);
 276
 277   caps.copies_capable =
 278       (DeviceCapabilities(name, port, DC_COPIES, NULL, NULL) > 1);
 279
 280   LoadPaper(name, port, user_settings.get(), &caps);
 281   LoadDpi(name, port, user_settings.get(), &caps);
 282
 283   *printer_info = caps;
 284   return true;
 285 }
 286
 287 bool PrintBackendWin::GetPrinterCapsAndDefaults(
 288     const std::string& printer_name,
 289     PrinterCapsAndDefaults* printer_info) {
 290   ScopedXPSInitializer xps_initializer;
 291   if (!xps_initializer.initialized()) {
 292     // TODO(sanjeevr): Handle legacy proxy case (with no prntvpt.dll)
 293     return false;
 294   }
 295   if (!IsValidPrinter(printer_name)) {
 296     return false;
 297   }
 298   DCHECK(printer_info);
 299   HPTPROVIDER provider = NULL;
 300   std::wstring printer_name_wide = base::UTF8ToWide(printer_name);
 301   HRESULT hr = XPSModule::OpenProvider(printer_name_wide, 1, &provider);
 302   if (provider) {
 303     base::win::ScopedComPtr<IStream> print_capabilities_stream;
 304     hr = CreateStreamOnHGlobal(NULL, TRUE,
 305                                print_capabilities_stream.Receive());
 306     DCHECK(SUCCEEDED(hr));
 307     if (print_capabilities_stream.get()) {
 308       base::win::ScopedBstr error;
 309       hr = XPSModule::GetPrintCapabilities(
 310           provider, NULL, print_capabilities_stream.get(), error.Receive());
 311       DCHECK(SUCCEEDED(hr));
 312       if (FAILED(hr)) {
 313         return false;
 314       }
 315       hr = StreamOnHGlobalToString(print_capabilities_stream.get(),
 316                                    &printer_info->printer_capabilities);
 317       DCHECK(SUCCEEDED(hr));
 318       printer_info->caps_mime_type = "text/xml";
 319     }
 320     ScopedPrinterHandle printer_handle;
 321     if (printer_handle.OpenPrinter(printer_name_wide.c_str())) {
 322       scoped_ptr<DEVMODE, base::FreeDeleter> devmode_out(
 323           CreateDevMode(printer_handle.Get(), NULL));
 324       if (!devmode_out)
 325         return false;
 326       base::win::ScopedComPtr<IStream> printer_defaults_stream;
 327       hr = CreateStreamOnHGlobal(NULL, TRUE,
 328                                  printer_defaults_stream.Receive());
 329       DCHECK(SUCCEEDED(hr));
 330       if (printer_defaults_stream.get()) {
 331         DWORD dm_size = devmode_out->dmSize + devmode_out->dmDriverExtra;
 332         hr = XPSModule::ConvertDevModeToPrintTicket(
 333             provider, dm_size, devmode_out.get(), kPTJobScope,
 334             printer_defaults_stream.get());
 335         DCHECK(SUCCEEDED(hr));
 336         if (SUCCEEDED(hr)) {
 337           hr = StreamOnHGlobalToString(printer_defaults_stream.get(),
 338                                        &printer_info->printer_defaults);
 339           DCHECK(SUCCEEDED(hr));
 340           printer_info->defaults_mime_type = "text/xml";
 341         }
 342       }
 343     }
 344     XPSModule::CloseProvider(provider);
 345   }
 346   return true;
 347 }
 348
 349 // Gets the information about driver for a specific printer.
 350 std::string PrintBackendWin::GetPrinterDriverInfo(
 351     const std::string& printer_name) {
 352   ScopedPrinterHandle printer;
 353   if (!printer.OpenPrinter(base::UTF8ToWide(printer_name).c_str())) {
 354     return std::string();
 355   }
 356   return GetDriverInfo(printer.Get());
 357 }
 358
 359 bool PrintBackendWin::IsValidPrinter(const std::string& printer_name) {
 360   ScopedPrinterHandle printer_handle;
 361   return printer_handle.OpenPrinter(base::UTF8ToWide(printer_name).c_str());
 362 }
 363
 364 scoped_refptr<PrintBackend> PrintBackend::CreateInstance(
 365     const base::DictionaryValue* print_backend_settings) {
 366   return new PrintBackendWin;
 367 }
 368
 369 }  // namespace printing