src/printing/backend/cups_helper.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/cups_helper.h"
   6
   7 #include <cups/ppd.h>
   8
   9 #include "base/file_util.h"
  10 #include "base/logging.h"
  11 #include "base/strings/string_number_conversions.h"
  12 #include "base/strings/string_split.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/values.h"
  15 #include "printing/backend/print_backend.h"
  16 #include "printing/backend/print_backend_consts.h"
  17 #include "url/gurl.h"
  18
  19 namespace printing {
  20
  21 // This section contains helper code for PPD parsing for semantic capabilities.
  22 namespace {
  23
  24 const char kColorDevice[] = "ColorDevice";
  25 const char kColorModel[] = "ColorModel";
  26 const char kColorMode[] = "ColorMode";
  27 const char kProcessColorModel[] = "ProcessColorModel";
  28 const char kPrintoutMode[] = "PrintoutMode";
  29 const char kDraftGray[] = "Draft.Gray";
  30 const char kHighGray[] = "High.Gray";
  31
  32 const char kDuplex[] = "Duplex";
  33 const char kDuplexNone[] = "None";
  34
  35 #if !defined(OS_MACOSX)
  36 void ParseLpOptions(const base::FilePath& filepath,
  37                     const std::string& printer_name,
  38                     int* num_options, cups_option_t** options) {
  39   std::string content;
  40   if (!base::ReadFileToString(filepath, &content))
  41     return;
  42
  43   const char kDest[] = "dest";
  44   const char kDefault[] = "default";
  45   const size_t kDestLen = sizeof(kDest) - 1;
  46   const size_t kDefaultLen = sizeof(kDefault) - 1;
  47   std::vector<std::string> lines;
  48   base::SplitString(content, '\n', &lines);
  49
  50   for (size_t i = 0; i < lines.size(); ++i) {
  51     std::string line = lines[i];
  52     if (line.empty())
  53       continue;
  54
  55     if (base::strncasecmp (line.c_str(), kDefault, kDefaultLen) == 0 &&
  56         isspace(line[kDefaultLen])) {
  57       line = line.substr(kDefaultLen);
  58     } else if (base::strncasecmp (line.c_str(), kDest, kDestLen) == 0 &&
  59                isspace(line[kDestLen])) {
  60       line = line.substr(kDestLen);
  61     } else {
  62       continue;
  63     }
  64
  65     base::TrimWhitespaceASCII(line, base::TRIM_ALL, &line);
  66     if (line.empty())
  67       continue;
  68
  69     size_t space_found = line.find(' ');
  70     if (space_found == std::string::npos)
  71       continue;
  72
  73     std::string name = line.substr(0, space_found);
  74     if (name.empty())
  75       continue;
  76
  77     if (base::strncasecmp(printer_name.c_str(), name.c_str(),
  78                           name.length()) != 0) {
  79       continue;  // This is not the required printer.
  80     }
  81
  82     line = line.substr(space_found + 1);
  83     // Remove extra spaces.
  84     base::TrimWhitespaceASCII(line, base::TRIM_ALL, &line);
  85     if (line.empty())
  86       continue;
  87     // Parse the selected printer custom options.
  88     *num_options = cupsParseOptions(line.c_str(), 0, options);
  89   }
  90 }
  91
  92 void MarkLpOptions(const std::string& printer_name, ppd_file_t** ppd) {
  93   cups_option_t* options = NULL;
  94   int num_options = 0;
  95   ppdMarkDefaults(*ppd);
  96
  97   const char kSystemLpOptionPath[] = "/etc/cups/lpoptions";
  98   const char kUserLpOptionPath[] = ".cups/lpoptions";
  99
 100   std::vector<base::FilePath> file_locations;
 101   file_locations.push_back(base::FilePath(kSystemLpOptionPath));
 102   file_locations.push_back(base::FilePath(
 103       base::GetHomeDir().Append(kUserLpOptionPath)));
 104
 105   for (std::vector<base::FilePath>::const_iterator it = file_locations.begin();
 106        it != file_locations.end(); ++it) {
 107     num_options = 0;
 108     options = NULL;
 109     ParseLpOptions(*it, printer_name, &num_options, &options);
 110     if (num_options > 0 && options) {
 111       cupsMarkOptions(*ppd, num_options, options);
 112       cupsFreeOptions(num_options, options);
 113     }
 114   }
 115 }
 116 #endif  // !defined(OS_MACOSX)
 117
 118 bool GetBasicColorModelSettings(ppd_file_t* ppd,
 119                                 ColorModel* color_model_for_black,
 120                                 ColorModel* color_model_for_color,
 121                                 bool* color_is_default) {
 122   ppd_option_t* color_model = ppdFindOption(ppd, kColorModel);
 123   if (!color_model)
 124     return false;
 125
 126   if (ppdFindChoice(color_model, printing::kBlack))
 127     *color_model_for_black = printing::BLACK;
 128   else if (ppdFindChoice(color_model, printing::kGray))
 129     *color_model_for_black = printing::GRAY;
 130   else if (ppdFindChoice(color_model, printing::kGrayscale))
 131     *color_model_for_black = printing::GRAYSCALE;
 132
 133   if (ppdFindChoice(color_model, printing::kColor))
 134     *color_model_for_color = printing::COLOR;
 135   else if (ppdFindChoice(color_model, printing::kCMYK))
 136     *color_model_for_color = printing::CMYK;
 137   else if (ppdFindChoice(color_model, printing::kRGB))
 138     *color_model_for_color = printing::RGB;
 139   else if (ppdFindChoice(color_model, printing::kRGBA))
 140     *color_model_for_color = printing::RGBA;
 141   else if (ppdFindChoice(color_model, printing::kRGB16))
 142     *color_model_for_color = printing::RGB16;
 143   else if (ppdFindChoice(color_model, printing::kCMY))
 144     *color_model_for_color = printing::CMY;
 145   else if (ppdFindChoice(color_model, printing::kKCMY))
 146     *color_model_for_color = printing::KCMY;
 147   else if (ppdFindChoice(color_model, printing::kCMY_K))
 148     *color_model_for_color = printing::CMY_K;
 149
 150   ppd_choice_t* marked_choice = ppdFindMarkedChoice(ppd, kColorModel);
 151   if (!marked_choice)
 152     marked_choice = ppdFindChoice(color_model, color_model->defchoice);
 153
 154   if (marked_choice) {
 155     *color_is_default =
 156         (base::strcasecmp(marked_choice->choice, printing::kBlack) != 0) &&
 157         (base::strcasecmp(marked_choice->choice, printing::kGray) != 0) &&
 158         (base::strcasecmp(marked_choice->choice, printing::kGrayscale) != 0);
 159   }
 160   return true;
 161 }
 162
 163 bool GetPrintOutModeColorSettings(ppd_file_t* ppd,
 164                                   ColorModel* color_model_for_black,
 165                                   ColorModel* color_model_for_color,
 166                                   bool* color_is_default) {
 167   ppd_option_t* printout_mode = ppdFindOption(ppd, kPrintoutMode);
 168   if (!printout_mode)
 169     return false;
 170
 171   *color_model_for_color = printing::PRINTOUTMODE_NORMAL;
 172   *color_model_for_black = printing::PRINTOUTMODE_NORMAL;
 173
 174   // Check to see if NORMAL_GRAY value is supported by PrintoutMode.
 175   // If NORMAL_GRAY is not supported, NORMAL value is used to
 176   // represent grayscale. If NORMAL_GRAY is supported, NORMAL is used to
 177   // represent color.
 178   if (ppdFindChoice(printout_mode, printing::kNormalGray))
 179     *color_model_for_black = printing::PRINTOUTMODE_NORMAL_GRAY;
 180
 181   // Get the default marked choice to identify the default color setting
 182   // value.
 183   ppd_choice_t* printout_mode_choice = ppdFindMarkedChoice(ppd, kPrintoutMode);
 184   if (!printout_mode_choice) {
 185       printout_mode_choice = ppdFindChoice(printout_mode,
 186                                            printout_mode->defchoice);
 187   }
 188   if (printout_mode_choice) {
 189     if ((base::strcasecmp(printout_mode_choice->choice,
 190                           printing::kNormalGray) == 0) ||
 191         (base::strcasecmp(printout_mode_choice->choice, kHighGray) == 0) ||
 192         (base::strcasecmp(printout_mode_choice->choice, kDraftGray) == 0)) {
 193       *color_model_for_black = printing::PRINTOUTMODE_NORMAL_GRAY;
 194       *color_is_default = false;
 195     }
 196   }
 197   return true;
 198 }
 199
 200 bool GetColorModeSettings(ppd_file_t* ppd,
 201                           ColorModel* color_model_for_black,
 202                           ColorModel* color_model_for_color,
 203                           bool* color_is_default) {
 204   // Samsung printers use "ColorMode" attribute in their ppds.
 205   ppd_option_t* color_mode_option = ppdFindOption(ppd, kColorMode);
 206   if (!color_mode_option)
 207     return false;
 208
 209   if (ppdFindChoice(color_mode_option, printing::kColor))
 210     *color_model_for_color = printing::COLORMODE_COLOR;
 211
 212   if (ppdFindChoice(color_mode_option, printing::kMonochrome))
 213     *color_model_for_black = printing::COLORMODE_MONOCHROME;
 214
 215   ppd_choice_t* mode_choice = ppdFindMarkedChoice(ppd, kColorMode);
 216   if (!mode_choice) {
 217     mode_choice = ppdFindChoice(color_mode_option,
 218                                 color_mode_option->defchoice);
 219   }
 220
 221   if (mode_choice) {
 222     *color_is_default =
 223         (base::strcasecmp(mode_choice->choice, printing::kColor) == 0);
 224   }
 225   return true;
 226 }
 227
 228 bool GetHPColorSettings(ppd_file_t* ppd,
 229                         ColorModel* color_model_for_black,
 230                         ColorModel* color_model_for_color,
 231                         bool* color_is_default) {
 232   // HP printers use "Color/Color Model" attribute in their ppds.
 233   ppd_option_t* color_mode_option = ppdFindOption(ppd, printing::kColor);
 234   if (!color_mode_option)
 235     return false;
 236
 237   if (ppdFindChoice(color_mode_option, printing::kColor))
 238     *color_model_for_color = printing::HP_COLOR_COLOR;
 239   if (ppdFindChoice(color_mode_option, printing::kBlack))
 240     *color_model_for_black = printing::HP_COLOR_BLACK;
 241
 242   ppd_choice_t* mode_choice = ppdFindMarkedChoice(ppd, kColorMode);
 243   if (!mode_choice) {
 244     mode_choice = ppdFindChoice(color_mode_option,
 245                                 color_mode_option->defchoice);
 246   }
 247   if (mode_choice) {
 248     *color_is_default =
 249         (base::strcasecmp(mode_choice->choice, printing::kColor) == 0);
 250   }
 251   return true;
 252 }
 253
 254 bool GetProcessColorModelSettings(ppd_file_t* ppd,
 255                                   ColorModel* color_model_for_black,
 256                                   ColorModel* color_model_for_color,
 257                                   bool* color_is_default) {
 258   // Canon printers use "ProcessColorModel" attribute in their ppds.
 259   ppd_option_t* color_mode_option =  ppdFindOption(ppd, kProcessColorModel);
 260   if (!color_mode_option)
 261     return false;
 262
 263   if (ppdFindChoice(color_mode_option, printing::kRGB))
 264     *color_model_for_color = printing::PROCESSCOLORMODEL_RGB;
 265   else if (ppdFindChoice(color_mode_option, printing::kCMYK))
 266     *color_model_for_color = printing::PROCESSCOLORMODEL_CMYK;
 267
 268   if (ppdFindChoice(color_mode_option, printing::kGreyscale))
 269     *color_model_for_black = printing::PROCESSCOLORMODEL_GREYSCALE;
 270
 271   ppd_choice_t* mode_choice = ppdFindMarkedChoice(ppd, kProcessColorModel);
 272   if (!mode_choice) {
 273     mode_choice = ppdFindChoice(color_mode_option,
 274                                 color_mode_option->defchoice);
 275   }
 276
 277   if (mode_choice) {
 278     *color_is_default =
 279         (base::strcasecmp(mode_choice->choice, printing::kGreyscale) != 0);
 280   }
 281   return true;
 282 }
 283
 284 bool GetColorModelSettings(ppd_file_t* ppd,
 285                            ColorModel* cm_black,
 286                            ColorModel* cm_color,
 287                            bool* is_color) {
 288   bool is_color_device = false;
 289   ppd_attr_t* attr = ppdFindAttr(ppd, kColorDevice, NULL);
 290   if (attr && attr->value)
 291     is_color_device = ppd->color_device;
 292
 293   *is_color = is_color_device;
 294   return (is_color_device &&
 295           GetBasicColorModelSettings(ppd, cm_black, cm_color, is_color)) ||
 296       GetPrintOutModeColorSettings(ppd, cm_black, cm_color, is_color) ||
 297       GetColorModeSettings(ppd, cm_black, cm_color, is_color) ||
 298       GetHPColorSettings(ppd, cm_black, cm_color, is_color) ||
 299       GetProcessColorModelSettings(ppd, cm_black, cm_color, is_color);
 300 }
 301
 302 // Default port for IPP print servers.
 303 const int kDefaultIPPServerPort = 631;
 304
 305 }  // namespace
 306
 307 // Helper wrapper around http_t structure, with connection and cleanup
 308 // functionality.
 309 HttpConnectionCUPS::HttpConnectionCUPS(const GURL& print_server_url,
 310                                        http_encryption_t encryption)
 311     : http_(NULL) {
 312   // If we have an empty url, use default print server.
 313   if (print_server_url.is_empty())
 314     return;
 315
 316   int port = print_server_url.IntPort();
 317   if (port == url::PORT_UNSPECIFIED)
 318     port = kDefaultIPPServerPort;
 319
 320   http_ = httpConnectEncrypt(print_server_url.host().c_str(), port, encryption);
 321   if (http_ == NULL) {
 322     LOG(ERROR) << "CP_CUPS: Failed connecting to print server: "
 323                << print_server_url;
 324   }
 325 }
 326
 327 HttpConnectionCUPS::~HttpConnectionCUPS() {
 328   if (http_ != NULL)
 329     httpClose(http_);
 330 }
 331
 332 void HttpConnectionCUPS::SetBlocking(bool blocking) {
 333   httpBlocking(http_, blocking ?  1 : 0);
 334 }
 335
 336 http_t* HttpConnectionCUPS::http() {
 337   return http_;
 338 }
 339
 340 bool ParsePpdCapabilities(
 341     const std::string& printer_name,
 342     const std::string& printer_capabilities,
 343     PrinterSemanticCapsAndDefaults* printer_info) {
 344   base::FilePath ppd_file_path;
 345   if (!base::CreateTemporaryFile(&ppd_file_path))
 346     return false;
 347
 348   int data_size = printer_capabilities.length();
 349   if (data_size != base::WriteFile(
 350                        ppd_file_path,
 351                        printer_capabilities.data(),
 352                        data_size)) {
 353     base::DeleteFile(ppd_file_path, false);
 354     return false;
 355   }
 356
 357   ppd_file_t* ppd = ppdOpenFile(ppd_file_path.value().c_str());
 358   if (!ppd)
 359     return false;
 360
 361   printing::PrinterSemanticCapsAndDefaults caps;
 362 #if !defined(OS_MACOSX)
 363   MarkLpOptions(printer_name, &ppd);
 364 #endif
 365   ppd_choice_t* duplex_choice = ppdFindMarkedChoice(ppd, kDuplex);
 366   if (!duplex_choice) {
 367     ppd_option_t* option = ppdFindOption(ppd, kDuplex);
 368     if (option)
 369       duplex_choice = ppdFindChoice(option, option->defchoice);
 370   }
 371
 372   if (duplex_choice) {
 373     caps.duplex_capable = true;
 374     if (base::strcasecmp(duplex_choice->choice, kDuplexNone) != 0)
 375       caps.duplex_default = printing::LONG_EDGE;
 376     else
 377       caps.duplex_default = printing::SIMPLEX;
 378   }
 379
 380   bool is_color = false;
 381   ColorModel cm_color = UNKNOWN_COLOR_MODEL, cm_black = UNKNOWN_COLOR_MODEL;
 382   if (!GetColorModelSettings(ppd, &cm_black, &cm_color, &is_color)) {
 383     VLOG(1) << "Unknown printer color model";
 384   }
 385
 386   caps.color_changeable = ((cm_color != UNKNOWN_COLOR_MODEL) &&
 387                            (cm_black != UNKNOWN_COLOR_MODEL) &&
 388                            (cm_color != cm_black));
 389   caps.color_default = is_color;
 390   caps.color_model = cm_color;
 391   caps.bw_model = cm_black;
 392
 393   ppdClose(ppd);
 394   base::DeleteFile(ppd_file_path, false);
 395
 396   *printer_info = caps;
 397   return true;
 398 }
 399
 400 }  // namespace printing