comparison: src/parser.cpp
src/parser.cpp
- changeset 3
- 55a55a9ec2c2
- child 4
- 68988ebc2a68
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| 2:2bdc3ac5e77c | 3:55a55a9ec2c2 |
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| 1 /* | |
| 2 * LDForge: LDraw parts authoring CAD | |
| 3 * Copyright (C) 2013 - 2018 Teemu Piippo | |
| 4 * | |
| 5 * This program is free software: you can redistribute it and/or modify | |
| 6 * it under the terms of the GNU General Public License as published by | |
| 7 * the Free Software Foundation, either version 3 of the License, or | |
| 8 * (at your option) any later version. | |
| 9 * | |
| 10 * This program is distributed in the hope that it will be useful, | |
| 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 * GNU General Public License for more details. | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License | |
| 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 */ | |
| 18 | |
| 19 #include "model.h" | |
| 20 #include "parser.h" | |
| 21 #include "objecttypes/comment.h" | |
| 22 #include "objecttypes/conditionaledge.h" | |
| 23 #include "objecttypes/edge.h" | |
| 24 #include "objecttypes/errorline.h" | |
| 25 #include "objecttypes/modelobject.h" | |
| 26 #include "objecttypes/polygon.h" | |
| 27 #include "objecttypes/subfilereference.h" | |
| 28 | |
| 29 /* | |
| 30 * Constructs an LDraw parser | |
| 31 */ | |
| 32 Parser::Parser(QIODevice& device, QObject* parent) : | |
| 33 QObject {parent}, | |
| 34 device {device} {} | |
| 35 | |
| 36 /* | |
| 37 * Reads a single line from the device. | |
| 38 */ | |
| 39 QString Parser::readLine() | |
| 40 { | |
| 41 return QString::fromUtf8(this->device.readLine()).trimmed(); | |
| 42 } | |
| 43 | |
| 44 const QMap<QString, decltype(LDHeader::type)> Parser::typeStrings { | |
| 45 {"Part", LDHeader::Part}, | |
| 46 {"Subpart", LDHeader::Subpart}, | |
| 47 {"Shortcut", LDHeader::Shortcut}, | |
| 48 {"Primitive", LDHeader::Primitive}, | |
| 49 {"8_Primitive", LDHeader::Primitive_8}, | |
| 50 {"48_Primitive", LDHeader::Primitive_48}, | |
| 51 {"Configuration", LDHeader::Configuration}, | |
| 52 }; | |
| 53 | |
| 54 /* | |
| 55 * Parses a single line of the header. | |
| 56 * Possible parse results: | |
| 57 * · ParseSuccess: the header line was parsed successfully. | |
| 58 * · ParseFailure: the header line was parsed incorrectly and needs to be handled otherwise. | |
| 59 * · StopParsing: the line does not belong in the header and header parsing needs to stop. | |
| 60 */ | |
| 61 Parser::HeaderParseResult Parser::parseHeaderLine( | |
| 62 LDHeader& header, | |
| 63 Winding& winding, | |
| 64 const QString& line | |
| 65 ) { | |
| 66 if (line.isEmpty()) | |
| 67 { | |
| 68 return ParseSuccess; | |
| 69 } | |
| 70 else if (not line.startsWith("0") or line.startsWith("0 //")) | |
| 71 { | |
| 72 return StopParsing; | |
| 73 } | |
| 74 else if (line.startsWith("0 !LDRAW_ORG ")) | |
| 75 { | |
| 76 QStringList tokens = line | |
| 77 .mid(strlen("0 !LDRAW_ORG ")) | |
| 78 .split(" ", QString::SkipEmptyParts); | |
| 79 | |
| 80 if (not tokens.isEmpty()) | |
| 81 { | |
| 82 QString partTypeString = tokens[0]; | |
| 83 // Anything that enters LDForge becomes unofficial in any case if saved. | |
| 84 // Therefore we don't need to give the Unofficial type any special | |
| 85 // consideration. | |
| 86 if (partTypeString.startsWith("Unofficial_")) | |
| 87 partTypeString = partTypeString.mid(strlen("Unofficial_")); | |
| 88 header.type = Parser::typeStrings.value(partTypeString, LDHeader::Part); | |
| 89 header.qualfiers = 0; | |
| 90 if (tokens.contains("Alias")) | |
| 91 header.qualfiers |= LDHeader::Alias; | |
| 92 if (tokens.contains("Physical_Color")) | |
| 93 header.qualfiers |= LDHeader::Physical_Color; | |
| 94 if (tokens.contains("Flexible_Section")) | |
| 95 header.qualfiers |= LDHeader::Flexible_Section; | |
| 96 return ParseSuccess; | |
| 97 } | |
| 98 else | |
| 99 { | |
| 100 return ParseFailure; | |
| 101 } | |
| 102 } | |
| 103 else if (line == "0 BFC CERTIFY CCW") | |
| 104 { | |
| 105 winding = CounterClockwise; | |
| 106 return ParseSuccess; | |
| 107 } | |
| 108 else if (line == "0 BFC CERTIFY CW") | |
| 109 { | |
| 110 winding = Clockwise; | |
| 111 return ParseSuccess; | |
| 112 } | |
| 113 else if (line == "0 BFC NOCERTIFY") | |
| 114 { | |
| 115 winding = NoWinding; | |
| 116 return ParseSuccess; | |
| 117 } | |
| 118 else if (line.startsWith("0 !HISTORY ")) | |
| 119 { | |
| 120 static const QRegExp historyRegexp { | |
| 121 R"(0 !HISTORY\s+(\d{4}-\d{2}-\d{2})\s+)" | |
| 122 R"((\{[^}]+|\[[^]]+)[\]}]\s+(.+))" | |
| 123 }; | |
| 124 if (historyRegexp.exactMatch(line)) | |
| 125 { | |
| 126 QString dateString = historyRegexp.capturedTexts().value(1); | |
| 127 QString authorWithPrefix = historyRegexp.capturedTexts().value(2); | |
| 128 QString description = historyRegexp.capturedTexts().value(3); | |
| 129 LDHeader::HistoryEntry historyEntry; | |
| 130 historyEntry.date = QDate::fromString(dateString, Qt::ISODate); | |
| 131 historyEntry.description = description; | |
| 132 | |
| 133 if (authorWithPrefix[0] == '{') | |
| 134 historyEntry.author = authorWithPrefix + "}"; | |
| 135 else | |
| 136 historyEntry.author = authorWithPrefix.mid(1); | |
| 137 | |
| 138 header.history.append(historyEntry); | |
| 139 return ParseSuccess; | |
| 140 } | |
| 141 else | |
| 142 { | |
| 143 return ParseFailure; | |
| 144 } | |
| 145 } | |
| 146 else if (line.startsWith("0 Author: ")) | |
| 147 { | |
| 148 header.author = line.mid(strlen("0 Author: ")); | |
| 149 return ParseSuccess; | |
| 150 } | |
| 151 else if (line.startsWith("0 Name: ")) | |
| 152 { | |
| 153 header.name = line.mid(strlen("0 Name: ")); | |
| 154 return ParseSuccess; | |
| 155 } | |
| 156 else if (line.startsWith("0 !HELP ")) | |
| 157 { | |
| 158 if (not header.help.isEmpty()) | |
| 159 header.help += "\n"; | |
| 160 header.help += line.mid(strlen("0 !HELP ")); | |
| 161 return ParseSuccess; | |
| 162 } | |
| 163 else if (line.startsWith("0 !KEYWORDS ")) | |
| 164 { | |
| 165 if (not header.keywords.isEmpty()) | |
| 166 header.keywords += "\n"; | |
| 167 header.keywords += line.mid(strlen("0 !KEYWORDS ")); | |
| 168 return ParseSuccess; | |
| 169 } | |
| 170 else if (line.startsWith("0 !CATEGORY ")) | |
| 171 { | |
| 172 header.category = line.mid(strlen("0 !CATEGORY ")); | |
| 173 return ParseSuccess; | |
| 174 } | |
| 175 else if (line.startsWith("0 !CMDLINE ")) | |
| 176 { | |
| 177 header.cmdline = line.mid(strlen("0 !CMDLINE ")); | |
| 178 return ParseSuccess; | |
| 179 } | |
| 180 else if (line.startsWith("0 !LICENSE Redistributable under CCAL version 2.0")) | |
| 181 { | |
| 182 header.license = LDHeader::CaLicense; | |
| 183 return ParseSuccess; | |
| 184 } | |
| 185 else if (line.startsWith("0 !LICENSE Not redistributable")) | |
| 186 { | |
| 187 header.license = LDHeader::NonCaLicense; | |
| 188 return ParseSuccess; | |
| 189 } | |
| 190 else | |
| 191 { | |
| 192 return ParseFailure; | |
| 193 } | |
| 194 } | |
| 195 | |
| 196 /* | |
| 197 * Parses the header from the device given at construction and returns | |
| 198 * the resulting header structure. | |
| 199 */ | |
| 200 LDHeader Parser::parseHeader(Winding& winding) | |
| 201 { | |
| 202 LDHeader header = {}; | |
| 203 | |
| 204 if (not this->device.atEnd()) | |
| 205 { | |
| 206 // Parse the description | |
| 207 QString descriptionLine = this->readLine(); | |
| 208 if (descriptionLine.startsWith("0 ")) | |
| 209 { | |
| 210 header.description = descriptionLine.mid(strlen("0 ")).trimmed(); | |
| 211 | |
| 212 // Parse the rest of the header | |
| 213 while (not this->device.atEnd()) | |
| 214 { | |
| 215 const QString& line = this->readLine(); | |
| 216 auto result = parseHeaderLine(header, winding, line); | |
| 217 | |
| 218 if (result == ParseFailure) | |
| 219 { | |
| 220 // Failed to parse this header line, add it as a comment into the body later. | |
| 221 this->bag.append(line); | |
| 222 } | |
| 223 else if (result == StopParsing) | |
| 224 { | |
| 225 // Header parsing stops, add this line to the body. | |
| 226 this->bag.append(line); | |
| 227 break; | |
| 228 } | |
| 229 } | |
| 230 } | |
| 231 else | |
| 232 { | |
| 233 this->bag.append(descriptionLine); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 return header; | |
| 238 } | |
| 239 | |
| 240 /** | |
| 241 * @brief Parses the model body into the given model. | |
| 242 * @param editor Handle to model edit context | |
| 243 */ | |
| 244 void Parser::parseBody(Model::EditContext& editor) | |
| 245 { | |
| 246 bool invertNext = false; | |
| 247 while (not this->device.atEnd()) | |
| 248 this->bag.append(this->readLine()); | |
| 249 for (const QString& line : this->bag) | |
| 250 { | |
| 251 if (line == "0 BFC INVERTNEXT" or line == "0 BFC CERTIFY INVERTNEXT") | |
| 252 { | |
| 253 invertNext = true; | |
| 254 continue; | |
| 255 } | |
| 256 modelobjects::BaseObject* object = parseFromString(editor, line); | |
| 257 if (invertNext) | |
| 258 { | |
| 259 editor.setObjectProperty(object, modelobjects::Property::IsInverted, true); | |
| 260 } | |
| 261 invertNext = false; | |
| 262 } | |
| 263 } | |
| 264 | |
| 265 modelobjects::BaseObject* Parser::parseFromString( | |
| 266 Model::EditContext& editor, | |
| 267 const QString& line) | |
| 268 { | |
| 269 return editor.append<modelobjects::Comment>(line); | |
| 270 } |
