src/documentmanager.cpp

Wed, 09 Mar 2022 12:42:45 +0200

author
Teemu Piippo <teemu@hecknology.net>
date
Wed, 09 Mar 2022 12:42:45 +0200
changeset 172
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parent 153
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child 176
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permissions
-rw-r--r--

Render vertices as spheres

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1 /*
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2 * LDForge: LDraw parts authoring CAD
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3 * Copyright (C) 2013 - 2020 Teemu Piippo
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4 *
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5 * This program is free software: you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation, either version 3 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18
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19 #include <QFile>
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20 #include <QDir>
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21 #include <QFileInfo>
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22 #include <QSaveFile>
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23 #include "documentmanager.h"
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24 #include "modeleditor.h"
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25 #include "linetypes/comment.h"
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26 #include "linetypes/subfilereference.h"
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27 #include "parser.h"
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28
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29 /**
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30 * @brief Constructs a new document manager
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31 * @param parent Parent object
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32 */
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33 DocumentManager::DocumentManager(QObject* parent) :
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34 QObject{parent}
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35 {
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36 }
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37
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38 /**
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39 * @brief Creates a new model.
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40 * @returns the ID of the new model
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41 */
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42 ModelId DocumentManager::newModel()
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43 {
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44 const ModelId modelId{++this->modelIdCounter};
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45 const QString name = makeNewModelName();
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46 this->openModels[modelId] = ModelInfo{
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47 .model = std::make_unique<Model>(),
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48 .id = modelId,
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49 .opentype = OpenType::ManuallyOpened,
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50 };
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51 this->makePolygonCacheForModel(modelId);
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52 return modelId;
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53 }
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54
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55 /**
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56 * @brief Looks for a model by name
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57 * @param name Name of the model
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58 * @returns model or null
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59 */
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60 Model* DocumentManager::findDependencyByName(const ModelId modelId, const QString& name)
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61 {
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62 const auto modelsIterator = this->openModels.find(modelId);
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63 if (modelsIterator != std::end(this->openModels))
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64 {
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65 const auto& dependencies = modelsIterator->second.dependencies;
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66 const auto dependenciesIterator = dependencies.find(name);
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67 if (dependenciesIterator != dependencies.end())
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68 {
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69 ModelInfo& modelInfo = this->openModels[dependenciesIterator->second];
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70 return modelInfo.model.get();
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71 }
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72 else
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73 {
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74 return nullptr;
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75 }
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76 }
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77 else
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78 {
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79 return nullptr;
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80 }
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81 }
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82
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83 /**
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84 * @brief Gets a model pointer by id or nullptr if not found
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85 * @param modelId id of model to find
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86 * @returns model pointer or null
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87 */
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88 Model *DocumentManager::getModelById(ModelId modelId)
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89 {
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90 const auto iterator = this->openModels.find(modelId);
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91 if (iterator != this->openModels.end())
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92 {
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93 return iterator->second.model.get();
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94 }
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95 else
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96 {
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97 return nullptr;
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98 }
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99 }
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100
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101 QString pathToName(const QFileInfo& path)
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102 {
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103 static const char* paths[] = {
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104 "s",
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105 "48"
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106 "8"
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107 };
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108 const QString baseName = path.fileName();
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109 const QString dirName = QFileInfo{path.dir().path()}.fileName();
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110 QString result;
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111 if (std::find(std::begin(paths), std::end(paths), dirName) != std::end(paths))
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112 {
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113 result = dirName + "\\" + baseName;
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114 }
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115 else
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116 {
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117 result = baseName;
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118 }
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119 return result;
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120 }
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121
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122 /**
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123 * @brief Tries to open the model at the specified path
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124 * @param path Path to the model to open
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125 * @param errorStream Where to write any errors
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126 * @param openType rationale behind opening this file
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127 * @returns model id, or no value on error
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128 */
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129 std::optional<ModelId> DocumentManager::openModel(
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130 const QString& path,
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131 QTextStream& errorStream,
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132 const OpenType openType
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133 ) {
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134 QFile file{path};
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135 const QString name = pathToName(path);
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136 file.open(QFile::ReadOnly | QFile::Text);
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137 std::unique_ptr<Model> newModel = std::make_unique<Model>(this);
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138 QTextStream textStream{&file};
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139 Parser parser{file};
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140 parser.parseBody(*newModel);
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141 std::optional<ModelId> result;
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142 if (file.error() == QFile::NoError)
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143 {
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144 const ModelId modelId{++this->modelIdCounter};
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145 this->openModels[modelId] = {std::move(newModel), modelId, path, openType};
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146 this->makePolygonCacheForModel(modelId);
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147 result = modelId;
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148 }
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149 else
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150 {
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151 errorStream << file.errorString();
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152 }
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153 return result;
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154 }
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155
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156 QString DocumentManager::makeNewModelName()
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157 {
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158 untitledNameCounter += 1;
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159 return "untitled-" + QString::number(untitledNameCounter);
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160 }
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161
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162 void DocumentManager::loadDependenciesForAllModels(const LibraryManager& libraries, QTextStream& errorStream)
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163 {
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164 for (const auto& modelInfoPair : this->openModels)
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165 {
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166 this->loadDependenciesForModel(modelInfoPair.first, modelInfoPair.second.path, libraries, errorStream);
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167 }
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168 }
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169
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170 struct DocumentManager::LoadDepedenciesBag
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171 {
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172 const LibraryManager& libraries;
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173 QStringList missing;
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174 QSet<ModelId> processed;
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175 QTextStream& errorStream;
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176 };
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177
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178 void DocumentManager::loadDependenciesForModel(
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179 const ModelId modelId,
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180 const QString& path,
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181 const LibraryManager& libraries,
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182 QTextStream& errorStream)
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183 {
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184 LoadDepedenciesBag bag {
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185 .libraries = libraries,
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186 .missing = {},
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187 .processed = {},
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188 .errorStream = errorStream,
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189 };
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190 this->loadDependenciesForModel(modelId, path, bag);
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191 if (not bag.missing.empty())
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192 {
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193 bag.missing.sort(Qt::CaseInsensitive);
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194 errorStream << utility::format(
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195 "The following files could not be opened: %1",
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196 bag.missing.join(", "));
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197 }
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198 }
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199
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200 void DocumentManager::closeDocument(const ModelId modelId)
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201 {
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202 ModelInfo* modelInfo = findInMap(this->openModels, modelId);
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203 if (modelInfo != nullptr)
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204 {
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205 modelInfo->opentype = OpenType::AutomaticallyOpened;
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206 this->prune();
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207 }
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208 }
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209
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210 const QString *DocumentManager::modelPath(ModelId modelId) const
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211 {
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212 const auto iterator = this->openModels.find(modelId);
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213 if (iterator != this->openModels.end())
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214 {
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215 return &iterator->second.path;
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216 }
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217 else
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218 {
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219 return nullptr;
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220 }
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221 }
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222
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223 /**
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224 * @brief Changes the path of the specified model. Since the name of the file may change,
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225 * changing the path can cause dependencies to be resolved differently. As such, dependencies
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226 * need to be resolved for all files after this operation.
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227 * @param modelId Model to change the path of
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228 * @param newPath New path
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229 * @param libraries Library manager for the purpose of dependency resolving
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230 * @param errorStream Where to write any errors regarding dependency resolving
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231 */
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232 void DocumentManager::setModelPath(
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233 const ModelId modelId,
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234 const QString &newPath,
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235 const LibraryManager &libraries,
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236 QTextStream &errorStream)
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237 {
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238 auto modelInfoPair = this->openModels.find(modelId);
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239 if (true
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240 and modelInfoPair != this->openModels.end()
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241 and modelInfoPair->second.opentype == OpenType::ManuallyOpened
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242 ) {
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243 modelInfoPair->second.path = newPath;
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244 this->loadDependenciesForAllModels(libraries, errorStream);
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245 }
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246 }
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247
148
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248 bool DocumentManager::saveModel(const ModelId modelId, QTextStream &errors)
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249 {
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250 const QString* const path = this->modelPath(modelId);
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251 if (path != nullptr)
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252 {
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253 QSaveFile file{*path};
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254 file.setDirectWriteFallback(true);
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255 if (file.open(QSaveFile::WriteOnly))
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256 {
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257 // if path is not nullptr, getModelById will always return a value as well
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258 ::save(*this->getModelById(modelId), &file);
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259 const bool commitSucceeded = file.commit();
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260 if (not commitSucceeded)
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261 {
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262 errors << tr("Could not save: %1").arg(file.errorString());
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263 return false;
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264 }
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265 else
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266 {
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267 return true;
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268 }
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269 }
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270 else
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271 {
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272 errors << tr("Could not open %1 for writing: %2")
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273 .arg(file.fileName())
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274 .arg(file.errorString());
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275 return false;
147
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276 }
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277 }
148
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278 else
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279 {
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280 errors << tr("Bad model ID %1").arg(modelId.value);
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281 return false;
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282 }
147
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283 }
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284
148
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285 /**
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286 * @brief Searches the open models for the specified model and returns its id if found
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287 * @param model model to look for
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288 * @return id or no value if not found
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289 */
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290 std::optional<ModelId> DocumentManager::findIdForModel(const Model *model) const
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291 {
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292 std::optional<ModelId> result;
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293 for (auto it = this->openModels.begin(); it != this->openModels.end(); ++it)
147
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294 {
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295 if (it->second.model.get() == model)
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296 {
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297 result = it->first;
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298 break;
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299 }
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300 }
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301 return result;
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302 }
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303
150
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304 PolygonCache *DocumentManager::getPolygonCacheForModel(ModelId modelId)
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305 {
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306 auto it = this->polygonCaches.find(modelId);
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307 if (it != this->polygonCaches.end())
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308 {
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309 return &it->second;
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310 }
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311 else
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312 {
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313 return nullptr;
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314 }
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315 }
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316
148
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317 /**
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318 * @brief Cleans up and erases models that are no longer required.
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319 */
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320 void DocumentManager::prune()
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321 {
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322 for (auto it = this->openModels.begin(); it != this->openModels.end(); ++it)
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323 {
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324 // Find models that are not edited by the user and are not needed by any other model
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325 if (true
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326 and it->second.opentype == OpenType::AutomaticallyOpened
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327 and not this->isReferencedByAnything(it->first)
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328 ) {
150
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329 // Remove its polygon cache
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330 const auto polygonCache = this->polygonCaches.find(it->first);
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331 if (polygonCache != this->polygonCaches.end())
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332 {
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333 this->polygonCaches.erase(polygonCache);
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334 }
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335 // Remove the model
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336 this->openModels.erase(it);
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337 // We need to start over now. It is possible that other models that previously
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338 // were referenced by the model we just erased have become prunable.
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339 // Moreover, our iterator is invalid now and we cannot continue in this for loop.
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340 this->prune();
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341 break;
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342 }
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343 }
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344 }
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345
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346 /**
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347 * @brief Finds out whether the specified model id is referenced by any other model
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348 * @param modelId
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349 * @returns bool
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350 */
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351 bool DocumentManager::isReferencedByAnything(const ModelId modelId) const
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352 {
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353 for (auto& haystackModelPair : this->openModels)
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354 {
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355 if (haystackModelPair.first != modelId)
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356 {
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357 for (auto& dependencyPair : haystackModelPair.second.dependencies)
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358 {
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359 if (dependencyPair.second == modelId)
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360 {
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361 return true;
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362 }
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363 }
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364 }
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365 }
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366 return false;
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367 }
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368
150
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369 void DocumentManager::makePolygonCacheForModel(const ModelId modelId)
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370 {
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371 Model* model = this->getModelById(modelId);
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372 if (model != nullptr)
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373 {
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374 this->polygonCaches.emplace(
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375 std::piecewise_construct,
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376 std::forward_as_tuple(modelId),
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377 std::forward_as_tuple(model));
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378 }
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379 }
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380
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381 static QString findFile(QString referenceName, const QString& path, const LibraryManager& libraries)
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382 {
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383 // Try to find the file in the same place as the model itself
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384 referenceName.replace("\\", "/");
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385 const QDir dir = QFileInfo{path}.dir();
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386 QString referencedFilePath = dir.filePath(referenceName);
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387 if (not QFileInfo{referencedFilePath}.exists())
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388 {
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389 // Look for it in the libraries
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390 referencedFilePath = libraries.findFile(referenceName);
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391 }
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392 return referencedFilePath;
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393 }
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394
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395 void DocumentManager::loadDependenciesForModel(
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396 const ModelId modelId,
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397 const QString &path,
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398 LoadDepedenciesBag& bag)
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399 {
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400 QSet<QString> failedToOpen;
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401 struct LoadingError
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402 {
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403 QString message;
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404 };
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405 bag.processed.insert(modelId);
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406 if (not this->openModels.contains(modelId))
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407 {
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408 bag.errorStream << tr("bad model ID %1").arg(modelId.value);
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409 return;
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410 }
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411 ModelInfo& modelInfo = this->openModels[modelId];
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412 modelInfo.dependencies.clear();
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413 for (int i = 0; i < modelInfo.model->size(); i += 1)
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414 {
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415 const QString referenceName = (*modelInfo.model)[i]->getProperty(ldraw::Property::ReferenceName).toString();
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416 if (not referenceName.isEmpty()
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417 and modelInfo.dependencies.count(referenceName) == 0
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418 and not failedToOpen.contains(referenceName))
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419 {
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420 try
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421 {
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422 const QString referencedFilePath = ::findFile(referenceName, path, bag.libraries);
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423 if (referencedFilePath.isEmpty())
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424 {
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425 throw LoadingError{tr("could not find '%1'").arg(referenceName)};
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426 }
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427 QString loadErrorString;
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428 QTextStream localErrorStream{&loadErrorString};
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429 const std::optional<ModelId> modelIdOpt = this->openModel(
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430 referencedFilePath,
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431 localErrorStream,
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432 OpenType::AutomaticallyOpened);
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433 if (not modelIdOpt.has_value())
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434 {
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435 const QString& errorMessage = tr("could not load '%1': %2")
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436 .arg(referencedFilePath)
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437 .arg(loadErrorString);
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438 throw LoadingError{errorMessage};
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439 }
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440 modelInfo.dependencies[referenceName] = modelIdOpt.value();
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441 if (not bag.processed.contains(modelIdOpt.value()))
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442 {
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443 this->loadDependenciesForModel(modelIdOpt.value(), referencedFilePath, bag);
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444 }
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445 }
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446 catch(const LoadingError& error)
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447 {
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448 bag.errorStream << error.message << "\n";
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449 failedToOpen.insert(referenceName);
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450 bag.missing.append(referenceName);
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451 }
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452 }
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453 }
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454 }

mercurial