1 /* 2 3 PrintTransport 4 5 Copyright (c) 2004 Haiku. 6 7 Authors: 8 Philippe Houdoin 9 Michael Pfeiffer 10 11 Permission is hereby granted, free of charge, to any person obtaining a copy of 12 this software and associated documentation files (the "Software"), to deal in 13 the Software without restriction, including without limitation the rights to 14 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 15 of the Software, and to permit persons to whom the Software is furnished to do 16 so, subject to the following conditions: 17 18 The above copyright notice and this permission notice shall be included in all 19 copies or substantial portions of the Software. 20 21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 22 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 23 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 24 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 25 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 26 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 27 THE SOFTWARE. 28 29 */ 30 31 #include "PrintTransport.h" 32 33 #include <Directory.h> 34 #include <File.h> 35 #include <FindDirectory.h> 36 #include <Path.h> 37 #include <String.h> 38 39 // implementation of class PrintTransport 40 PrintTransport::PrintTransport() 41 : fDataIO(NULL) 42 , fAddOnID(-1) 43 , fExitProc(NULL) 44 { 45 } 46 47 PrintTransport::~PrintTransport() 48 { 49 if (fExitProc) { 50 (*fExitProc)(); 51 fExitProc = NULL; 52 } 53 54 if (fAddOnID >= 0) { 55 unload_add_on(fAddOnID); 56 fAddOnID = -1; 57 } 58 } 59 60 status_t PrintTransport::Open(BNode* printerFolder) 61 { 62 // already opened? 63 if (fDataIO != NULL) { 64 return B_ERROR; 65 } 66 67 // retrieve transport add-on name from printer folder attribute 68 BString transportName; 69 if (printerFolder->ReadAttrString("transport", &transportName) != B_OK) { 70 return B_ERROR; 71 } 72 73 const directory_which paths[] = { 74 B_USER_NONPACKAGED_ADDONS_DIRECTORY, 75 B_USER_ADDONS_DIRECTORY, 76 B_SYSTEM_NONPACKAGED_ADDONS_DIRECTORY, 77 B_SYSTEM_ADDONS_DIRECTORY, 78 }; 79 BPath path; 80 for (uint32 i = 0; i < sizeof(paths) / sizeof(paths[0]); ++i) { 81 if (find_directory(paths[i], &path) != B_OK) 82 continue; 83 path.Append("Print/transport"); 84 path.Append(transportName.String()); 85 fAddOnID = load_add_on(path.Path()); 86 if (fAddOnID >= 0) 87 break; 88 } 89 90 if (fAddOnID < 0) { 91 // failed to load transport add-on 92 return B_ERROR; 93 } 94 95 // get init & exit proc 96 BDataIO* (*initProc)(BMessage*); 97 get_image_symbol(fAddOnID, "init_transport", B_SYMBOL_TYPE_TEXT, (void **) &initProc); 98 get_image_symbol(fAddOnID, "exit_transport", B_SYMBOL_TYPE_TEXT, (void **) &fExitProc); 99 100 if (initProc == NULL || fExitProc == NULL) { 101 // transport add-on has not the proper interface 102 return B_ERROR; 103 } 104 105 // now, initialize the transport add-on 106 node_ref ref; 107 BDirectory dir; 108 109 printerFolder->GetNodeRef(&ref); 110 dir.SetTo(&ref); 111 112 if (path.SetTo(&dir, NULL) != B_OK) { 113 return B_ERROR; 114 } 115 116 // request BDataIO object from transport add-on 117 BMessage input('TRIN'); 118 input.AddString("printer_file", path.Path()); 119 fDataIO = (*initProc)(&input); 120 return B_OK; 121 } 122 123 BDataIO* 124 PrintTransport::GetDataIO() 125 { 126 return fDataIO; 127 } 128 129 bool PrintTransport::IsPrintToFileCanceled() const 130 { 131 // The BeOS "Print To File" transport add-on returns a non-NULL BDataIO * 132 // even after user filepanel cancellation! 133 BFile* file = dynamic_cast<BFile*>(fDataIO); 134 return fDataIO == NULL || (file != NULL && file->InitCheck() != B_OK); 135 } 136