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1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
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2 /* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */ |
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3 /* This Source Code Form is subject to the terms of the Mozilla Public |
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4 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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6 |
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7 #ifndef nsCUPSShim_h___ |
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8 #define nsCUPSShim_h___ |
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9 |
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10 |
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11 /* Various CUPS data types. We don't #include cups headers to avoid |
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12 * requiring CUPS to be installed on the build host (and to avoid having |
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13 * to test for CUPS in configure). |
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14 */ |
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15 typedef struct /**** Printer Options ****/ |
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16 { |
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17 char *name; /* Name of option */ |
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18 char *value; /* Value of option */ |
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19 } cups_option_t; |
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20 |
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21 typedef struct /**** Destination ****/ |
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22 { |
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23 char *name, /* Printer or class name */ |
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24 *instance; /* Local instance name or nullptr */ |
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25 int is_default; /* Is this printer the default? */ |
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26 int num_options; /* Number of options */ |
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27 cups_option_t *options; /* Options */ |
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28 } cups_dest_t; |
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29 |
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30 typedef cups_dest_t* (*CupsGetDestType)(const char *printer, |
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31 const char *instance, |
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32 int num_dests, |
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33 cups_dest_t *dests); |
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34 typedef int (*CupsGetDestsType)(cups_dest_t **dests); |
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35 typedef int (*CupsFreeDestsType)(int num_dests, |
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36 cups_dest_t *dests); |
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37 typedef int (*CupsPrintFileType)(const char *printer, |
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38 const char *filename, |
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39 const char *title, |
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40 int num_options, |
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41 cups_option_t *options); |
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42 typedef int (*CupsTempFdType)(char *filename, |
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43 int length); |
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44 typedef int (*CupsAddOptionType)(const char *name, |
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45 const char *value, |
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46 int num_options, |
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47 cups_option_t **options); |
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48 |
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49 struct PRLibrary; |
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50 |
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51 /* Note: this class relies on static initialization. */ |
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52 class nsCUPSShim { |
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53 public: |
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54 /** |
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55 * Initialize this object. Attempt to load the CUPS shared |
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56 * library and find function pointers for the supported |
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57 * functions (see below). |
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58 * @return false if the shared library could not be loaded, or if |
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59 * any of the functions could not be found. |
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60 * true for successful initialization. |
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61 */ |
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62 bool Init(); |
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63 |
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64 /** |
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65 * @return true if the object was initialized successfully. |
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66 * false otherwise. |
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67 */ |
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68 bool IsInitialized() { return nullptr != mCupsLib; } |
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69 |
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70 /* Function pointers for supported functions. These are only |
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71 * valid after successful initialization. |
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72 */ |
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73 CupsAddOptionType mCupsAddOption; |
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74 CupsFreeDestsType mCupsFreeDests; |
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75 CupsGetDestType mCupsGetDest; |
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76 CupsGetDestsType mCupsGetDests; |
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77 CupsPrintFileType mCupsPrintFile; |
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78 CupsTempFdType mCupsTempFd; |
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79 |
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80 private: |
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81 PRLibrary *mCupsLib; |
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82 }; |
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83 |
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84 |
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85 |
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86 #endif /* nsCUPSShim_h___ */ |