mcs/class/System.Drawing/System.Drawing.Printing/PrintingServicesUnix.cs

   1 //#define PrintDebug
   2 //
   3 // Copyright (C) 2005, 2007 Novell, Inc. http://www.novell.com
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24 // Author:
  25 //
  26 //      Jordi Mas i Hernandez, jordimash@gmail.com
  27 //
  28
  29 using System.Runtime.InteropServices;
  30 using System.Collections;
  31 using System.Collections.Specialized;
  32 using System.Drawing.Printing;
  33 using System.ComponentModel;
  34 using System.Drawing.Imaging;
  35 using System.Text;
  36 using System.IO;
  37
  38 namespace System.Drawing.Printing
  39 {
  40         internal class PrintingServicesUnix : PrintingServices
  41         {
  42                 #region Private Fields
  43
  44                 private static Hashtable doc_info = new Hashtable ();
  45                 private static bool cups_installed;
  46
  47                 //private string printer_name;
  48
  49                 private static Hashtable installed_printers;
  50                 private static string default_printer = String.Empty;
  51
  52                 #endregion
  53
  54                 #region Constructor
  55
  56                 internal PrintingServicesUnix () {
  57                 }
  58
  59                 static PrintingServicesUnix () {
  60                         installed_printers = new Hashtable ();
  61                         CheckCupsInstalled ();
  62                 }
  63
  64                 #endregion
  65
  66                 #region Properties
  67
  68                 internal static PrinterSettings.StringCollection InstalledPrinters {
  69                         get {
  70                                 LoadPrinters();
  71                                 PrinterSettings.StringCollection list = new PrinterSettings.StringCollection (new string[] {});
  72                                 foreach (object key in installed_printers.Keys) {
  73                                         list.Add (key.ToString());
  74                                 }
  75                                 return list;
  76                         }
  77                 }
  78
  79                 internal override string DefaultPrinter {
  80                         get {
  81                                 if (installed_printers.Count == 0)
  82                                         LoadPrinters();
  83                                 return default_printer;
  84                         }
  85                 }
  86
  87                 #endregion
  88
  89
  90                 #region Methods
  91
  92                 /// <summary>
  93                 /// Do a cups call to check if it is installed
  94                 /// </summary>
  95                 private static void CheckCupsInstalled ()
  96                 {
  97                         try {
  98                                 cupsGetDefault ();
  99                         }
 100                         catch (DllNotFoundException) {
 101                                 Console.WriteLine("libcups not found. To have printing support, you need cups installed");
 102                                 cups_installed = false;
 103                                 return;
 104                         }
 105
 106                         cups_installed = true;
 107                 }
 108
 109                 /// <summary>
 110                 /// Open the printer's PPD file
 111                 /// </summary>
 112                 /// <param name="printer">Printer name, returned from cupsGetDests</param>
 113                 private IntPtr OpenPrinter (string printer)
 114                 {
 115                         try {
 116                                 IntPtr ptr = cupsGetPPD (printer);
 117                                 string ppd_filename = Marshal.PtrToStringAnsi (ptr);
 118                                 IntPtr ppd_handle = ppdOpenFile (ppd_filename);
 119                                 return ppd_handle;
 120                         }
 121                         catch (Exception) {
 122                                 Console.WriteLine ("There was an error opening the printer {0}. Please check your cups installation.");
 123                         }
 124                         return IntPtr.Zero;
 125                 }
 126
 127                 /// <summary>
 128                 /// Close the printer file
 129                 /// </summary>
 130                 /// <param name="handle">PPD handle</param>
 131                 private void ClosePrinter (ref IntPtr handle)
 132                 {
 133                         try {
 134                                 if (handle != IntPtr.Zero)
 135                                         ppdClose (handle);
 136                         }
 137                         finally {
 138                                 handle = IntPtr.Zero;
 139                         }
 140                 }
 141
 142                 private static int OpenDests (ref IntPtr ptr) {
 143                         try {
 144                                 return cupsGetDests (ref ptr);
 145                         }
 146                         catch {
 147                                 ptr = IntPtr.Zero;
 148                         }
 149                         return 0;
 150                 }
 151
 152                 private static void CloseDests (ref IntPtr ptr, int count) {
 153                         try {
 154                                 if (ptr != IntPtr.Zero)
 155                                         cupsFreeDests (count, ptr);
 156                         }
 157                         finally {
 158                                 ptr = IntPtr.Zero;
 159                         }
 160                 }
 161
 162                 /// <summary>
 163                 /// Checks if a printer has a valid PPD file. Caches the result unless force is true
 164                 /// </summary>
 165                 /// <param name="force">Does the check disregarding the last cached value if true</param>
 166                 internal override bool IsPrinterValid(string printer)
 167                 {
 168                         if (!cups_installed || printer == null | printer == String.Empty)
 169                                 return false;
 170
 171                         return installed_printers.Contains (printer);
 172 /*
 173                         if (!force && this.printer_name != null && String.Intern(this.printer_name).Equals(printer))
 174                                 return is_printer_valid;
 175
 176                         IntPtr ptr = cupsGetPPD (printer);
 177                         string ppd_filename = Marshal.PtrToStringAnsi (ptr);
 178                         is_printer_valid = ppd_filename != null;
 179                         this.printer_name = printer;
 180                         return is_printer_valid;
 181 */
 182                 }
 183
 184                 /// <summary>
 185                 /// Loads the printer settings and initializes the PrinterSettings and PageSettings fields
 186                 /// </summary>
 187                 /// <param name="printer">Printer name</param>
 188                 /// <param name="settings">PrinterSettings object to initialize</param>
 189                 internal override void LoadPrinterSettings (string printer, PrinterSettings settings)
 190                 {
 191                         if (cups_installed == false || (printer == null) || (printer == String.Empty))
 192                                 return;
 193
 194                         if (installed_printers.Count == 0)
 195                                 LoadPrinters ();
 196
 197                         if (((SysPrn.Printer)installed_printers[printer]).Settings != null) {
 198                                 SysPrn.Printer p = (SysPrn.Printer) installed_printers[printer];
 199                                 settings.can_duplex = p.Settings.can_duplex;
 200                                 settings.is_plotter = p.Settings.is_plotter;
 201                                 settings.landscape_angle = p.Settings.landscape_angle;
 202                                 settings.maximum_copies = p.Settings.maximum_copies;
 203                                 settings.paper_sizes = p.Settings.paper_sizes;
 204                                 settings.paper_sources = p.Settings.paper_sources;
 205                                 settings.printer_capabilities = p.Settings.printer_capabilities;
 206                                 settings.printer_resolutions = p.Settings.printer_resolutions;
 207                                 settings.supports_color = p.Settings.supports_color;
 208                                 return;
 209                         }
 210
 211                         settings.PrinterCapabilities.Clear ();
 212
 213                         IntPtr dests = IntPtr.Zero, ptr = IntPtr.Zero, ptr_printer, ppd_handle = IntPtr.Zero;
 214                         string name = String.Empty;
 215                         CUPS_DESTS printer_dest;
 216                         PPD_FILE ppd;
 217                         int ret = 0, cups_dests_size;
 218                         NameValueCollection options, paper_names, paper_sources;
 219
 220                         try {
 221                                 ret = OpenDests (ref dests);
 222                                 if (ret == 0)
 223                                         return;
 224
 225                                 cups_dests_size = Marshal.SizeOf (typeof(CUPS_DESTS));
 226                                 ptr = dests;
 227                                 for (int i = 0; i < ret; i++) {
 228                                         ptr_printer = (IntPtr) Marshal.ReadIntPtr (ptr);
 229                                         if (Marshal.PtrToStringAnsi (ptr_printer).Equals(printer)) {
 230                                                 name = printer;
 231                                                 break;
 232                                         }
 233                                         ptr = (IntPtr) ((long)ptr + cups_dests_size);
 234                                 }
 235
 236                                 if (!name.Equals(printer)) {
 237                                         return;
 238                                 }
 239
 240                                 ppd_handle = OpenPrinter (printer);
 241                                 if (ppd_handle == IntPtr.Zero)
 242                                         return;
 243
 244                                 printer_dest = (CUPS_DESTS) Marshal.PtrToStructure (ptr, typeof (CUPS_DESTS));
 245                                 options = new NameValueCollection();
 246                                 paper_names = new NameValueCollection();
 247                                 paper_sources = new NameValueCollection();
 248                                 string defsize;
 249                                 string defsource;
 250                                 LoadPrinterOptions (printer_dest.options, printer_dest.num_options, ppd_handle, options,
 251                                         paper_names, out defsize,
 252                                         paper_sources, out defsource);
 253
 254                                 if (settings.paper_sizes == null)
 255                                         settings.paper_sizes = new PrinterSettings.PaperSizeCollection (new PaperSize [] {});
 256                                 else
 257                                         settings.paper_sizes.Clear();
 258
 259                                 if (settings.paper_sources == null)
 260                                         settings.paper_sources = new PrinterSettings.PaperSourceCollection (new PaperSource [] {});
 261                                 else
 262                                         settings.paper_sources.Clear();
 263
 264                                 settings.DefaultPageSettings.PaperSource = LoadPrinterPaperSources (settings, defsource, paper_sources);
 265                                 settings.DefaultPageSettings.PaperSize = LoadPrinterPaperSizes (ppd_handle, settings, defsize, paper_names);
 266                                 LoadPrinterResolutionsAndDefault (printer, settings, ppd_handle);
 267
 268                                 ppd = (PPD_FILE) Marshal.PtrToStructure (ppd_handle, typeof (PPD_FILE));
 269                                 settings.landscape_angle = ppd.landscape;
 270                                 settings.supports_color = (ppd.color_device == 0) ? false : true;
 271                                 settings.can_duplex = options["Duplex"] != null;
 272
 273                                 ClosePrinter (ref ppd_handle);
 274
 275                                 ((SysPrn.Printer)installed_printers[printer]).Settings = settings;
 276                         }
 277                         finally {
 278                                 CloseDests (ref dests, ret);
 279                         }
 280                 }
 281
 282                 /// <summary>
 283                 /// Loads the global options of a printer plus the paper types and trays supported,
 284                 /// and sets the default paper size and source tray.
 285                 /// </summary>
 286                 /// <param name="options">The options field of a printer's CUPS_DESTS structure</param>
 287                 /// <param name="numOptions">The number of options of the printer</param>
 288                 /// <param name="ppd">A ppd handle for the printer, returned by ppdOpen</param>
 289                 /// <param name="list">The list of options</param>
 290                 /// <param name="paper_names">A list of types of paper (PageSize)</param>
 291                 /// <param name="defsize">The default paper size, set by LoadOptionList</param>
 292                 /// <param name="paper_sources">A list of trays(InputSlot) </param>
 293                 /// <param name="defsource">The default source tray, set by LoadOptionList</param>
 294                 private static void LoadPrinterOptions(IntPtr options, int numOptions, IntPtr ppd,
 295                                                                                  NameValueCollection list,
 296                                                                                  NameValueCollection paper_names, out string defsize,
 297                                                                                  NameValueCollection paper_sources, out string defsource)
 298                 {
 299                         CUPS_OPTIONS cups_options;
 300                         string option_name, option_value;
 301                         int cups_size = Marshal.SizeOf(typeof(CUPS_OPTIONS));
 302
 303                         for (int j = 0; j < numOptions; j++)
 304                         {
 305                                 cups_options = (CUPS_OPTIONS) Marshal.PtrToStructure(options, typeof(CUPS_OPTIONS));
 306                                 option_name = Marshal.PtrToStringAnsi(cups_options.name);
 307                                 option_value = Marshal.PtrToStringAnsi(cups_options.val);
 308
 309                                 #if PrintDebug
 310                                 Console.WriteLine("{0} = {1}", option_name, option_value);
 311                                 #endif
 312
 313                                 list.Add(option_name, option_value);
 314
 315                                 options = (IntPtr) ((long)options + cups_size);
 316                         }
 317
 318                         LoadOptionList (ppd, "PageSize", paper_names, out defsize);
 319                         LoadOptionList (ppd, "InputSlot", paper_sources, out defsource);
 320                 }
 321
 322                 /// <summary>
 323                 /// Loads the global options of a printer.
 324                 /// </summary>
 325                 /// <param name="options">The options field of a printer's CUPS_DESTS structure</param>
 326                 /// <param name="numOptions">The number of options of the printer</param>
 327                 private static NameValueCollection LoadPrinterOptions(IntPtr options, int numOptions)
 328                 {
 329                         CUPS_OPTIONS cups_options;
 330                         string option_name, option_value;
 331                         int cups_size = Marshal.SizeOf (typeof(CUPS_OPTIONS));
 332                         NameValueCollection list = new NameValueCollection ();
 333                         for (int j = 0; j < numOptions; j++)
 334                         {
 335                                 cups_options = (CUPS_OPTIONS) Marshal.PtrToStructure(options, typeof(CUPS_OPTIONS));
 336                                 option_name = Marshal.PtrToStringAnsi (cups_options.name);
 337                                 option_value = Marshal.PtrToStringAnsi (cups_options.val);
 338
 339                                 #if PrintDebug
 340                                 Console.WriteLine("{0} = {1}", option_name, option_value);
 341                                 #endif
 342
 343                                 list.Add (option_name, option_value);
 344
 345                                 options = (IntPtr) ((long)options + cups_size);
 346                         }
 347                         return list;
 348                 }
 349
 350                 /// <summary>
 351                 /// Loads a printer's options (selection of paper sizes, paper sources, etc)
 352                 /// and sets the default option from the selected list.
 353                 /// </summary>
 354                 /// <param name="ppd">Printer ppd file handle</param>
 355                 /// <param name="option_name">Name of the option group to load</param>
 356                 /// <param name="list">List of loaded options</param>
 357                 /// <param name="defoption">The default option from the loaded options list</param>
 358                 private static void LoadOptionList (IntPtr ppd, string option_name, NameValueCollection list, out string defoption) {
 359
 360                         IntPtr ptr = IntPtr.Zero;
 361                         PPD_OPTION ppd_option;
 362                         PPD_CHOICE choice;
 363                         int choice_size = Marshal.SizeOf(typeof(PPD_CHOICE));
 364                         defoption = null;
 365
 366                         ptr = ppdFindOption (ppd, option_name);
 367                         if (ptr != IntPtr.Zero)
 368                         {
 369                                 ppd_option = (PPD_OPTION) Marshal.PtrToStructure (ptr, typeof (PPD_OPTION));
 370                                 #if PrintDebug
 371                                 Console.WriteLine (" OPTION  key:{0} def:{1} text: {2}", ppd_option.keyword, ppd_option.defchoice, ppd_option.text);
 372                                 #endif
 373                                 defoption = ppd_option.defchoice;
 374                                 ptr = ppd_option.choices;
 375                                 for (int c = 0; c < ppd_option.num_choices; c++) {
 376                                         choice = (PPD_CHOICE) Marshal.PtrToStructure (ptr, typeof (PPD_CHOICE));
 377                                         list.Add(choice.choice, choice.text);
 378                                         #if PrintDebug
 379                                         Console.WriteLine ("       choice:{0} - text: {1}", choice.choice, choice.text);
 380                                         #endif
 381
 382                                         ptr = (IntPtr) ((long)ptr + choice_size);
 383                                 }
 384                         }
 385                 }
 386
 387                 /// <summary>
 388                 /// Loads a printer's available resolutions
 389                 /// </summary>
 390                 /// <param name="printer">Printer name</param>
 391                 /// <param name="settings">PrinterSettings object to fill</param>
 392                 internal override void LoadPrinterResolutions (string printer, PrinterSettings settings)
 393                 {
 394                         IntPtr ppd_handle = OpenPrinter (printer);
 395                         if (ppd_handle == IntPtr.Zero)
 396                                 return;
 397
 398                         LoadPrinterResolutionsAndDefault (printer, settings, ppd_handle);
 399
 400                         ClosePrinter (ref ppd_handle);
 401                 }
 402
 403                 /// <summary>
 404                 /// Create a PrinterResolution from a string Resolution that is set in the PPD option.
 405                 /// An example of Resolution is "600x600dpi" or "600dpi". Returns null if malformed or "Unknown".
 406                 /// </summary>
 407                 private PrinterResolution ParseResolution (string resolution)
 408                 {
 409                         if (String.IsNullOrEmpty (resolution))
 410                                 return null;
 411
 412                         int dpiIndex = resolution.IndexOf ("dpi");
 413                         if (dpiIndex == -1)
 414                         {
 415                                 // Resolution is "Unknown" or unparsable
 416                                 return null;
 417                         }
 418                         resolution = resolution.Substring (0, dpiIndex);
 419
 420                         int x_resolution, y_resolution;
 421                         try {
 422                                 if (resolution.Contains ("x")) {
 423                                         string[] resolutions = resolution.Split (new[] {'x'});
 424                                         x_resolution = Convert.ToInt32 (resolutions [0]);
 425                                         y_resolution = Convert.ToInt32 (resolutions [1]);
 426                                 } else {
 427                                         x_resolution = Convert.ToInt32 (resolution);
 428                                         y_resolution = x_resolution;
 429                                 }
 430                         } catch (Exception) {
 431                                 return null;
 432                         }
 433
 434                         return new PrinterResolution (x_resolution, y_resolution, PrinterResolutionKind.Custom);
 435                 }
 436
 437                 /// <summary>
 438                 /// Loads a printer's paper sizes. Returns the default PaperSize, and fills a list of paper_names for use in dialogues
 439                 /// </summary>
 440                 /// <param name="ppd_handle">PPD printer file handle</param>
 441                 /// <param name="settings">PrinterSettings object to fill</param>
 442                 /// <param name="def_size">Default paper size, from the global options of the printer</param>
 443                 /// <param name="paper_names">List of available paper sizes that gets filled</param>
 444                 private PaperSize LoadPrinterPaperSizes(IntPtr ppd_handle, PrinterSettings settings,
 445                                                                                                 string def_size, NameValueCollection paper_names)
 446                 {
 447                         IntPtr ptr;
 448                         string real_name;
 449                         PPD_FILE ppd;
 450                         PPD_SIZE size;
 451                         PaperSize ps;
 452
 453                         PaperSize defsize = new PaperSize ("A4", 827, 1169, GetPaperKind (827, 1169), true);
 454                         ppd = (PPD_FILE) Marshal.PtrToStructure (ppd_handle, typeof (PPD_FILE));
 455                         ptr = ppd.sizes;
 456                         float w, h;
 457                         for (int i = 0; i < ppd.num_sizes; i++) {
 458                                 size = (PPD_SIZE) Marshal.PtrToStructure (ptr, typeof (PPD_SIZE));
 459                                 real_name = paper_names[size.name];
 460                                 w = size.width * 100 / 72;
 461                                 h = size.length * 100 / 72;
 462                                 PaperKind kind = GetPaperKind ((int) w, (int) h);
 463                                 ps = new PaperSize (real_name, (int) w, (int) h, kind, def_size == kind.ToString ());
 464                                 ps.SetKind (kind);
 465                                 if (def_size == ps.Kind.ToString ())
 466                                         defsize = ps;
 467                                 settings.paper_sizes.Add (ps);
 468                                 ptr = (IntPtr) ((long)ptr + Marshal.SizeOf (size));
 469                         }
 470
 471                         return defsize;
 472
 473                 }
 474
 475                 /// <summary>
 476                 /// Loads a printer's paper sources (trays). Returns the default PaperSource, and fills a list of paper_sources for use in dialogues
 477                 /// </summary>
 478                 /// <param name="settings">PrinterSettings object to fill</param>
 479                 /// <param name="def_source">Default paper source, from the global options of the printer</param>
 480                 /// <param name="paper_sources">List of available paper sizes that gets filled</param>
 481                 private PaperSource LoadPrinterPaperSources (PrinterSettings settings, string def_source,
 482                                                                                                         NameValueCollection paper_sources)
 483                 {
 484                         PaperSourceKind kind;
 485                         PaperSource defsource = null;
 486                         foreach(string source in paper_sources) {
 487                                 switch (source)
 488                                 {
 489                                         case "Auto":
 490                                                 kind = PaperSourceKind.AutomaticFeed;
 491                                                 break;
 492                                         case "Standard":
 493                                                 kind = PaperSourceKind.AutomaticFeed;
 494                                                 break;
 495                                         case "Tray":
 496                                                 kind = PaperSourceKind.AutomaticFeed;
 497                                                 break;
 498                                         case "Envelope":
 499                                                 kind = PaperSourceKind.Envelope;
 500                                                 break;
 501                                         case "Manual":
 502                                                 kind = PaperSourceKind.Manual;
 503                                                 break;
 504                                         default:
 505                                                 kind = PaperSourceKind.Custom;
 506                                                 break;
 507                                 }
 508                                 settings.paper_sources.Add (new PaperSource (paper_sources[source], kind, def_source == source));
 509                                 if (def_source == source)
 510                                         defsource = settings.paper_sources[settings.paper_sources.Count-1];
 511                         }
 512
 513                         if (defsource == null && settings.paper_sources.Count > 0)
 514                                 return settings.paper_sources[0];
 515                         return defsource;
 516                 }
 517
 518                 /// <summary>
 519                 /// Sets the available resolutions and default resolution from a
 520                 /// printer's PPD file into settings.
 521                 /// </summary>
 522                 private void LoadPrinterResolutionsAndDefault (string printer,
 523                         PrinterSettings settings, IntPtr ppd_handle)
 524                 {
 525                         if (settings.printer_resolutions == null)
 526                                 settings.printer_resolutions = new PrinterSettings.PrinterResolutionCollection (new PrinterResolution [] {});
 527                         else
 528                                 settings.printer_resolutions.Clear ();
 529
 530                         var printer_resolutions = new NameValueCollection ();
 531                         string defresolution;
 532                         LoadOptionList (ppd_handle, "Resolution", printer_resolutions, out defresolution);
 533                         foreach (var resolution in printer_resolutions.Keys) {
 534                                 var new_resolution = ParseResolution (resolution.ToString ());
 535                                 settings.PrinterResolutions.Add (new_resolution);
 536                         }
 537
 538                         var default_resolution = ParseResolution (defresolution);
 539
 540                         if (default_resolution == null)
 541                                 default_resolution = ParseResolution ("300dpi");
 542                         if (printer_resolutions.Count == 0)
 543                                 settings.PrinterResolutions.Add (default_resolution);
 544
 545                         settings.DefaultPageSettings.PrinterResolution = default_resolution;
 546                 }
 547
 548                 /// <summary>
 549                 /// </summary>
 550                 /// <param name="load"></param>
 551                 /// <param name="def_printer"></param>
 552                 private static void LoadPrinters()
 553                 {
 554                         installed_printers.Clear ();
 555                         if (cups_installed == false)
 556                                 return;
 557
 558                         IntPtr dests = IntPtr.Zero, ptr_printers;
 559                         CUPS_DESTS printer;
 560                         int n_printers = 0;
 561                         int cups_dests_size = Marshal.SizeOf(typeof(CUPS_DESTS));
 562                         string name, first, type, status, comment;
 563                         first = type = status = comment = String.Empty;
 564                         int state = 0;
 565
 566                         try {
 567                                 n_printers = OpenDests (ref dests);
 568
 569                                 ptr_printers = dests;
 570                                 for (int i = 0; i < n_printers; i++) {
 571                                         printer = (CUPS_DESTS) Marshal.PtrToStructure (ptr_printers, typeof (CUPS_DESTS));
 572                                         name = Marshal.PtrToStringAnsi (printer.name);
 573
 574                                         if (printer.is_default == 1)
 575                                                 default_printer = name;
 576
 577                                         if (first.Equals (String.Empty))
 578                                                 first = name;
 579
 580                                         NameValueCollection options = LoadPrinterOptions(printer.options, printer.num_options);
 581
 582                                         if (options["printer-state"] != null)
 583                                                 state = Int32.Parse(options["printer-state"]);
 584
 585                                         if (options["printer-comment"] != null)
 586                                                 comment = options["printer-state"];
 587
 588                                         switch(state) {
 589                                                 case 4:
 590                                                         status = "Printing";
 591                                                         break;
 592                                                 case 5:
 593                                                         status = "Stopped";
 594                                                         break;
 595                                                 default:
 596                                                         status =  "Ready";
 597                                                         break;
 598                                         }
 599
 600                                         installed_printers.Add (name, new SysPrn.Printer (String.Empty, type, status, comment));
 601
 602                                         ptr_printers = (IntPtr) ((long)ptr_printers + cups_dests_size);
 603                                 }
 604
 605                         }
 606                         finally {
 607                                 CloseDests (ref dests, n_printers);
 608                         }
 609
 610                         if (default_printer.Equals (String.Empty))
 611                                 default_printer = first;
 612                 }
 613
 614                 /// <summary>
 615                 /// Gets a printer's settings for use in the print dialogue
 616                 /// </summary>
 617                 /// <param name="printer"></param>
 618                 /// <param name="port"></param>
 619                 /// <param name="type"></param>
 620                 /// <param name="status"></param>
 621                 /// <param name="comment"></param>
 622                 internal override void GetPrintDialogInfo (string printer, ref string port, ref string type, ref string status, ref string comment) {
 623                         int count = 0, state = -1;
 624                         bool found = false;
 625                         CUPS_DESTS cups_dests;
 626                         IntPtr dests = IntPtr.Zero, ptr_printers, ptr_printer;
 627                         int cups_dests_size = Marshal.SizeOf(typeof(CUPS_DESTS));
 628
 629                         if (cups_installed == false)
 630                                 return;
 631
 632                         try {
 633                                 count = OpenDests (ref dests);
 634
 635                                 if (count == 0)
 636                                         return;
 637
 638                                 ptr_printers = dests;
 639
 640                                 for (int i = 0; i < count; i++) {
 641                                         ptr_printer = (IntPtr) Marshal.ReadIntPtr (ptr_printers);
 642                                         if (Marshal.PtrToStringAnsi (ptr_printer).Equals(printer)) {
 643                                                 found = true;
 644                                                 break;
 645                                         }
 646                                         ptr_printers = (IntPtr) ((long)ptr_printers + cups_dests_size);
 647                                 }
 648
 649                                 if (!found)
 650                                         return;
 651
 652                                 cups_dests = (CUPS_DESTS) Marshal.PtrToStructure (ptr_printers, typeof (CUPS_DESTS));
 653
 654                                 NameValueCollection options = LoadPrinterOptions(cups_dests.options, cups_dests.num_options);
 655
 656                                 if (options["printer-state"] != null)
 657                                         state = Int32.Parse(options["printer-state"]);
 658
 659                                 if (options["printer-comment"] != null)
 660                                         comment = options["printer-state"];
 661
 662                                 switch(state) {
 663                                         case 4:
 664                                                 status = "Printing";
 665                                                 break;
 666                                         case 5:
 667                                                 status = "Stopped";
 668                                                 break;
 669                                         default:
 670                                                 status =  "Ready";
 671                                                 break;
 672                                 }
 673                         }
 674                         finally {
 675                                 CloseDests (ref dests, count);
 676                         }
 677                 }
 678
 679                 /// <summary>
 680                 /// Returns the appropriate PaperKind for the width and height
 681                 /// </summary>
 682                 /// <param name="width"></param>
 683                 /// <param name="height"></param>
 684                 private PaperKind GetPaperKind (int width, int height)
 685                 {
 686                         if (width == 827 && height == 1169)
 687                                 return PaperKind.A4;
 688                         if (width == 583 && height == 827)
 689                                 return PaperKind.A5;
 690                         if (width == 717 && height == 1012)
 691                                 return PaperKind.B5;
 692                         if (width == 693 && height == 984)
 693                                 return PaperKind.B5Envelope;
 694                         if (width == 638 && height == 902)
 695                                 return PaperKind.C5Envelope;
 696                         if (width == 449 && height == 638)
 697                                 return PaperKind.C6Envelope;
 698                         if (width == 1700 && height == 2200)
 699                                 return PaperKind.CSheet;
 700                         if (width == 433 && height == 866)
 701                                 return PaperKind.DLEnvelope;
 702                         if (width == 2200 && height == 3400)
 703                                 return PaperKind.DSheet;
 704                         if (width == 3400 && height == 4400)
 705                                 return PaperKind.ESheet;
 706                         if (width == 725 && height == 1050)
 707                                 return PaperKind.Executive;
 708                         if (width == 850 && height == 1300)
 709                                 return PaperKind.Folio;
 710                         if (width == 850 && height == 1200)
 711                                 return PaperKind.GermanStandardFanfold;
 712                         if (width == 1700 && height == 1100)
 713                                 return PaperKind.Ledger;
 714                         if (width == 850 && height == 1400)
 715                                 return PaperKind.Legal;
 716                         if (width == 927 && height == 1500)
 717                                 return PaperKind.LegalExtra;
 718                         if (width == 850 && height == 1100)
 719                                 return PaperKind.Letter;
 720                         if (width == 927 && height == 1200)
 721                                 return PaperKind.LetterExtra;
 722                         if (width == 850 && height == 1269)
 723                                 return PaperKind.LetterPlus;
 724                         if (width == 387 && height == 750)
 725                                 return PaperKind.MonarchEnvelope;
 726                         if (width == 387 && height == 887)
 727                                 return PaperKind.Number9Envelope;
 728                         if (width == 413 && height == 950)
 729                                 return PaperKind.Number10Envelope;
 730                         if (width == 450 && height == 1037)
 731                                 return PaperKind.Number11Envelope;
 732                         if (width == 475 && height == 1100)
 733                                 return PaperKind.Number12Envelope;
 734                         if (width == 500 && height == 1150)
 735                                 return PaperKind.Number14Envelope;
 736                         if (width == 363 && height == 650)
 737                                 return PaperKind.PersonalEnvelope;
 738                         if (width == 1000 && height == 1100)
 739                                 return PaperKind.Standard10x11;
 740                         if (width == 1000 && height == 1400)
 741                                 return PaperKind.Standard10x14;
 742                         if (width == 1100 && height == 1700)
 743                                 return PaperKind.Standard11x17;
 744                         if (width == 1200 && height == 1100)
 745                                 return PaperKind.Standard12x11;
 746                         if (width == 1500 && height == 1100)
 747                                 return PaperKind.Standard15x11;
 748                         if (width == 900 && height == 1100)
 749                                 return PaperKind.Standard9x11;
 750                         if (width == 550 && height == 850)
 751                                 return PaperKind.Statement;
 752                         if (width == 1100 && height == 1700)
 753                                 return PaperKind.Tabloid;
 754                         if (width == 1487 && height == 1100)
 755                                 return PaperKind.USStandardFanfold;
 756
 757                         return PaperKind.Custom;
 758                 }
 759
 760                 #endregion
 761
 762                 #region Print job methods
 763
 764                 static string tmpfile;
 765
 766                 /// <summary>
 767                 /// Gets a pointer to an options list parsed from the printer's current settings, to use when setting up the printing job
 768                 /// </summary>
 769                 /// <param name="printer_settings"></param>
 770                 /// <param name="page_settings"></param>
 771                 /// <param name="options"></param>
 772                 internal static int GetCupsOptions (PrinterSettings printer_settings, PageSettings page_settings, out IntPtr options)
 773                 {
 774                         options = IntPtr.Zero;
 775
 776                         PaperSize size = page_settings.PaperSize;
 777                         int width = size.Width * 72 / 100;
 778                         int height = size.Height * 72 / 100;
 779
 780                         StringBuilder sb = new StringBuilder();
 781                         sb.Append(
 782                                 "copies=" + printer_settings.Copies + " " +
 783                                 "Collate=" + printer_settings.Collate + " " +
 784                                 "ColorModel=" + (page_settings.Color ? "Color" : "Black") + " " +
 785                                 "PageSize=" + String.Format ("Custom.{0}x{1}", width, height) + " " +
 786                                 "landscape=" + page_settings.Landscape
 787                         );
 788
 789                         if (printer_settings.CanDuplex)
 790                         {
 791                                 if (printer_settings.Duplex == Duplex.Simplex)
 792                                         sb.Append(" Duplex=None");
 793                                 else
 794                                         sb.Append(" Duplex=DuplexNoTumble");
 795                         }
 796
 797                         return cupsParseOptions (sb.ToString(), 0, ref options);
 798                 }
 799
 800                 internal static bool StartDoc (GraphicsPrinter gr, string doc_name, string output_file)
 801                 {
 802                         DOCINFO doc = (DOCINFO) doc_info[gr.Hdc];
 803                         doc.title = doc_name;
 804                         return true;
 805                 }
 806
 807                 internal static bool EndDoc (GraphicsPrinter gr)
 808                 {
 809                         DOCINFO doc = (DOCINFO) doc_info[gr.Hdc];
 810
 811                         gr.Graphics.Dispose (); // Dispose object to force surface finish
 812
 813                         IntPtr options;
 814                         int options_count = GetCupsOptions (doc.settings, doc.default_page_settings, out options);
 815
 816                         cupsPrintFile (doc.settings.PrinterName, doc.filename, doc.title, options_count, options);
 817                         cupsFreeOptions (options_count, options);
 818                         doc_info.Remove (gr.Hdc);
 819                         if (tmpfile != null) {
 820                                 try { File.Delete (tmpfile); }
 821                                 catch { }
 822                         }
 823                         return true;
 824                 }
 825
 826                 internal static bool StartPage (GraphicsPrinter gr)
 827                 {
 828                         return true;
 829                 }
 830
 831                 internal static bool EndPage (GraphicsPrinter gr)
 832                 {
 833                         GdipGetPostScriptSavePage (gr.Hdc);
 834                         return true;
 835                 }
 836
 837                 // Unfortunately, PrinterSettings and PageSettings couldn't be referencing each other,
 838                 // thus we need to pass them separately
 839                 internal static IntPtr CreateGraphicsContext (PrinterSettings settings, PageSettings default_page_settings)
 840                 {
 841                         IntPtr graphics = IntPtr.Zero;
 842                         string name;
 843                         if (!settings.PrintToFile) {
 844                                 StringBuilder sb = new StringBuilder (1024);
 845                                 int length = sb.Capacity;
 846                                 cupsTempFile (sb, length);
 847                                 name = sb.ToString ();
 848                                 tmpfile = name;
 849                         }
 850                         else
 851                                 name = settings.PrintFileName;
 852
 853                         PaperSize psize = default_page_settings.PaperSize;
 854                         int width, height;
 855                         if (default_page_settings.Landscape) { // Swap in case of landscape
 856                                 width = psize.Height;
 857                                 height = psize.Width;
 858                         } else {
 859                                 width = psize.Width;
 860                                 height = psize.Height;
 861                         }
 862
 863                         GdipGetPostScriptGraphicsContext (name,
 864                                 width * 72 / 100,
 865                                 height * 72 / 100,
 866                                 default_page_settings.PrinterResolution.X,
 867                                 default_page_settings.PrinterResolution.Y, ref graphics);
 868
 869                         DOCINFO doc = new DOCINFO ();
 870                         doc.filename = name;
 871                         doc.settings = settings;
 872                         doc.default_page_settings = default_page_settings;
 873                         doc_info.Add (graphics, doc);
 874
 875                         return graphics;
 876                 }
 877
 878                 #endregion
 879
 880                 #region DllImports
 881
 882                 [DllImport("libcups", CharSet=CharSet.Ansi)]
 883                 static extern int cupsGetDests (ref IntPtr dests);
 884
 885 //              [DllImport("libcups", CharSet=CharSet.Ansi)]
 886 //              static extern void cupsGetDest (string name, string instance, int num_dests, ref IntPtr dests);
 887
 888                 [DllImport("libcups")]
 889                 static extern void cupsFreeDests (int num_dests, IntPtr dests);
 890
 891                 [DllImport("libcups", CharSet=CharSet.Ansi)]
 892                 static extern IntPtr cupsTempFile (StringBuilder sb, int len);
 893
 894                 [DllImport("libcups", CharSet=CharSet.Ansi)]
 895                 static extern IntPtr cupsGetDefault ();
 896
 897                 [DllImport("libcups", CharSet=CharSet.Ansi)]
 898                 static extern int cupsPrintFile (string printer, string filename, string title, int num_options, IntPtr options);
 899
 900                 [DllImport("libcups", CharSet=CharSet.Ansi)]
 901                 static extern IntPtr cupsGetPPD (string printer);
 902
 903                 [DllImport("libcups", CharSet=CharSet.Ansi)]
 904                 static extern IntPtr ppdOpenFile (string filename);
 905
 906                 [DllImport("libcups", CharSet=CharSet.Ansi)]
 907                 static extern IntPtr ppdFindOption (IntPtr ppd_file, string keyword);
 908
 909                 [DllImport("libcups")]
 910                 static extern void ppdClose (IntPtr ppd);
 911
 912                 [DllImport ("libcups", CharSet=CharSet.Ansi)]
 913                 static extern int cupsParseOptions (string arg, int number_of_options, ref IntPtr options);
 914
 915                 [DllImport("libcups")]
 916                 static extern void cupsFreeOptions (int number_options, IntPtr options);
 917
 918                 [DllImport("gdiplus.dll", CharSet=CharSet.Ansi)]
 919                 static extern int GdipGetPostScriptGraphicsContext (string filename, int with, int height, double dpix, double dpiy, ref IntPtr graphics);
 920
 921                 [DllImport("gdiplus.dll")]
 922                 static extern int GdipGetPostScriptSavePage (IntPtr graphics);
 923
 924                 #endregion
 925
 926                 #region Struct
 927                 public struct DOCINFO
 928                 {
 929                         public PrinterSettings settings;
 930                         public PageSettings default_page_settings;
 931                         public string title;
 932                         public string filename;
 933                 }
 934
 935                 public struct PPD_SIZE
 936                 {
 937                         public  int marked;
 938                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=42)]
 939                         public  string name;
 940                         public  float width;
 941                         public  float length;
 942                         public  float left;
 943                         public  float bottom;
 944                         public  float right;
 945                         public  float top;
 946                 }
 947
 948                 public struct PPD_GROUP
 949                 {
 950                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=40)]
 951                         public string text;
 952                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=42)]
 953                         public string name;
 954                         public int num_options;
 955                         public IntPtr options;
 956                         public int num_subgroups;
 957                         public IntPtr subgrups;
 958                 }
 959
 960                 public struct PPD_OPTION
 961                 {
 962                         public byte     conflicted;
 963                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=41)]
 964                         public string   keyword;
 965                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=41)]
 966                         public string   defchoice;
 967                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=81)]
 968                         public string   text;
 969                         public int      ui;
 970                         public int      section;
 971                         public float    order;
 972                         public int      num_choices;
 973                         public IntPtr   choices;
 974                 }
 975
 976                 public struct PPD_CHOICE
 977                 {
 978                         public byte     marked;
 979                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=41)]
 980                         public string   choice;
 981                         [MarshalAs(UnmanagedType.ByValTStr, SizeConst=81)]
 982                         public string   text;
 983                         public IntPtr   code;
 984                         public IntPtr   option;
 985                 }
 986
 987                 public struct PPD_FILE
 988                 {
 989                         public int      language_level;
 990                         public int      color_device;
 991                         public int      variable_sizes;
 992                         public int      accurate_screens;
 993                         public int      contone_only;
 994                         public int      landscape;
 995                         public int      model_number;
 996                         public int      manual_copies;
 997                         public int      throughput;
 998                         public int      colorspace;
 999                         public IntPtr   patches;
1000                         public int      num_emulations;
1001                         public IntPtr   emulations;
1002                         public IntPtr   jcl_begin;
1003                         public IntPtr   jcl_ps;
1004                         public IntPtr   jcl_end;
1005                         public IntPtr   lang_encoding;
1006                         public IntPtr   lang_version;
1007                         public IntPtr   modelname;
1008                         public IntPtr   ttrasterizer;
1009                         public IntPtr   manufacturer;
1010                         public IntPtr   product;
1011                         public IntPtr   nickname;
1012                         public IntPtr   shortnickname;
1013                         public int      num_groups;
1014                         public IntPtr   groups;
1015                         public int      num_sizes;
1016                         public IntPtr   sizes;
1017
1018                         /* There is more data after this that we are not using*/
1019                 }
1020
1021
1022                 public struct CUPS_OPTIONS
1023                 {
1024                         public IntPtr name;
1025                         public IntPtr val;
1026                 }
1027
1028                 public struct CUPS_DESTS
1029                 {
1030                         public IntPtr   name;
1031                         public IntPtr   instance;
1032                         public int      is_default;
1033                         public int      num_options;
1034                         public IntPtr   options;
1035                 }
1036
1037                 #endregion
1038         }
1039
1040         class GlobalPrintingServicesUnix : GlobalPrintingServices
1041         {
1042                 internal override PrinterSettings.StringCollection InstalledPrinters {
1043                         get {
1044                                 return PrintingServicesUnix.InstalledPrinters;
1045                         }
1046                 }
1047
1048                 internal override IntPtr CreateGraphicsContext (PrinterSettings settings, PageSettings default_page_settings)
1049                 {
1050                         return PrintingServicesUnix.CreateGraphicsContext (settings, default_page_settings);
1051                 }
1052
1053                 internal override bool StartDoc (GraphicsPrinter gr, string doc_name, string output_file)
1054                 {
1055                         return PrintingServicesUnix.StartDoc (gr, doc_name, output_file);
1056                 }
1057
1058                 internal override bool EndDoc (GraphicsPrinter gr)
1059                 {
1060                         return PrintingServicesUnix.EndDoc (gr);
1061                 }
1062
1063                 internal override bool StartPage (GraphicsPrinter gr)
1064                 {
1065                         return PrintingServicesUnix.StartPage (gr);
1066                 }
1067
1068                 internal override bool EndPage (GraphicsPrinter gr)
1069                 {
1070                         return PrintingServicesUnix.EndPage (gr);
1071                 }
1072         }
1073 }
1074