src/documentmanager.cpp

Wed, 08 Jun 2022 19:33:00 +0300

author
Teemu Piippo <teemu@hecknology.net>
date
Wed, 08 Jun 2022 19:33:00 +0300
changeset 204
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parent 201
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child 206
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permissions
-rw-r--r--

Concentrate model editing into one coroutine inside main()

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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 "parser.h"
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25
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26 /**
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27 * @brief Constructs a new document manager
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28 * @param parent Parent object
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29 */
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30 DocumentManager::DocumentManager(QObject* parent) :
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31 QObject{parent}
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32 {
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33 }
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34
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35 /**
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36 * @brief Creates a new model.
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37 * @returns the ID of the new model
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38 */
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39 ModelId DocumentManager::newModel()
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40 {
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41 const ModelId modelId{++this->modelIdCounter};
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42 const QString name = makeNewModelName();
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43 this->openModels[modelId] = ModelInfo{
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44 .model = std::make_unique<Model>(this),
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45 .id = modelId,
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46 .opentype = OpenType::ManuallyOpened,
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47 };
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48 this->makePolygonCacheForModel(modelId);
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49 return modelId;
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50 }
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51
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52 /**
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53 * @brief Looks for a model by name
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54 * @param name Name of the model
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55 * @returns model or null
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56 */
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57 Model* DocumentManager::findDependencyByName(const ModelId modelId, const QString& name)
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58 {
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59 const auto modelsIterator = this->openModels.find(modelId);
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60 if (modelsIterator != std::end(this->openModels))
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61 {
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62 const auto& dependencies = modelsIterator->second.dependencies;
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63 const auto dependenciesIterator = dependencies.find(name);
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64 if (dependenciesIterator != dependencies.end())
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65 {
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66 ModelInfo& modelInfo = this->openModels[dependenciesIterator->second];
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67 return modelInfo.model.get();
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68 }
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69 else
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70 {
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71 return nullptr;
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72 }
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73 }
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74 else
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75 {
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76 return nullptr;
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77 }
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78 }
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79
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80 /**
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81 * @brief Gets a model pointer by id or nullptr if not found
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82 * @param modelId id of model to find
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83 * @returns model pointer or null
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84 */
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85 Model *DocumentManager::getModelById(ModelId modelId)
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86 {
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87 const auto iterator = this->openModels.find(modelId);
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88 if (iterator != this->openModels.end())
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89 {
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90 return iterator->second.model.get();
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91 }
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92 else
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93 {
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94 return nullptr;
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95 }
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96 }
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97
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98 QString pathToName(const QFileInfo& path)
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99 {
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100 static const char* paths[] = {
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101 "s",
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102 "48"
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103 "8"
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104 };
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105 const QString baseName = path.fileName();
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106 const QString dirName = QFileInfo{path.dir().path()}.fileName();
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107 QString result;
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108 if (std::find(std::begin(paths), std::end(paths), dirName) != std::end(paths))
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109 {
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110 result = dirName + "\\" + baseName;
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111 }
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112 else
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113 {
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114 result = baseName;
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115 }
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116 return result;
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117 }
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118
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119 /**
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120 * @brief Tries to open the model at the specified path
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121 * @param path Path to the model to open
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122 * @param errorStream Where to write any errors
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123 * @param openType rationale behind opening this file
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124 * @returns model id, or no value on error
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125 */
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126 std::optional<ModelId> DocumentManager::openModel(
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127 const QString& path,
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128 QTextStream& errorStream,
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129 const OpenType openType
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130 ) {
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131 QFile file{path};
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132 const QString name = pathToName(path);
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133 file.open(QFile::ReadOnly | QFile::Text);
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134 std::unique_ptr<Model> newModel = std::make_unique<Model>(this);
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135 QTextStream textStream{&file};
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136 Parser parser{file};
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137 parser.parseBody(*newModel);
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138 std::optional<ModelId> result;
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139 if (file.error() == QFile::NoError)
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140 {
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141 const ModelId modelId{++this->modelIdCounter};
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142 this->openModels[modelId] = {std::move(newModel), modelId, path, openType};
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143 this->makePolygonCacheForModel(modelId);
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144 result = modelId;
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145 }
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146 else
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147 {
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148 errorStream << file.errorString();
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149 }
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150 return result;
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151 }
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152
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153 QString DocumentManager::makeNewModelName()
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154 {
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155 untitledNameCounter += 1;
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156 return "untitled-" + QString::number(untitledNameCounter);
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157 }
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158
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159 void DocumentManager::loadDependenciesForAllModels(const LibraryManager& libraries, QTextStream& errorStream)
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160 {
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161 for (const auto& modelInfoPair : this->openModels)
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162 {
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163 this->loadDependenciesForModel(modelInfoPair.first, modelInfoPair.second.path, libraries, errorStream);
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164 }
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165 }
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166
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167 struct DocumentManager::LoadDepedenciesBag
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168 {
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169 const LibraryManager& libraries;
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170 QStringList missing;
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171 QSet<ModelId> processed;
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172 QTextStream& errorStream;
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173 };
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174
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175 void DocumentManager::loadDependenciesForModel(
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176 const ModelId modelId,
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177 const QString& path,
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178 const LibraryManager& libraries,
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179 QTextStream& errorStream)
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180 {
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181 LoadDepedenciesBag bag {
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182 .libraries = libraries,
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183 .missing = {},
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184 .processed = {},
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185 .errorStream = errorStream,
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186 };
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187 this->loadDependenciesForModel(modelId, path, bag);
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188 if (not bag.missing.empty())
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189 {
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190 bag.missing.sort(Qt::CaseInsensitive);
201
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191 errorStream << format(
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192 tr("The following files could not be opened: %1"),
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193 bag.missing.join(", "));
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194 }
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195 }
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196
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197 void DocumentManager::closeDocument(const ModelId modelId)
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198 {
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199 ModelInfo* modelInfo = findInMap(this->openModels, modelId);
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200 if (modelInfo != nullptr)
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201 {
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202 modelInfo->opentype = OpenType::AutomaticallyOpened;
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203 this->prune();
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204 }
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205 }
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206
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207 const QString *DocumentManager::modelPath(ModelId modelId) const
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208 {
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209 const auto iterator = this->openModels.find(modelId);
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210 if (iterator != this->openModels.end())
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211 {
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212 return &iterator->second.path;
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213 }
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214 else
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215 {
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216 return nullptr;
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217 }
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218 }
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219
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220 /**
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221 * @brief Changes the path of the specified model. Since the name of the file may change,
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222 * changing the path can cause dependencies to be resolved differently. As such, dependencies
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223 * need to be resolved for all files after this operation.
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224 * @param modelId Model to change the path of
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225 * @param newPath New path
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226 * @param libraries Library manager for the purpose of dependency resolving
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227 * @param errorStream Where to write any errors regarding dependency resolving
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228 */
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229 void DocumentManager::setModelPath(
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230 const ModelId modelId,
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231 const QString &newPath,
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232 const LibraryManager &libraries,
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233 QTextStream &errorStream)
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234 {
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235 auto modelInfoPair = this->openModels.find(modelId);
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236 if (true
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237 and modelInfoPair != this->openModels.end()
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238 and modelInfoPair->second.opentype == OpenType::ManuallyOpened
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239 ) {
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240 modelInfoPair->second.path = newPath;
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241 this->loadDependenciesForAllModels(libraries, errorStream);
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242 }
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243 }
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244
148
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245 bool DocumentManager::saveModel(const ModelId modelId, QTextStream &errors)
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246 {
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247 const QString* const path = this->modelPath(modelId);
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248 if (path != nullptr)
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249 {
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250 QSaveFile file{*path};
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251 file.setDirectWriteFallback(true);
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252 if (file.open(QSaveFile::WriteOnly))
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253 {
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254 // if path is not nullptr, getModelById will always return a value as well
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255 ::save(*this->getModelById(modelId), &file);
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256 const bool commitSucceeded = file.commit();
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257 if (not commitSucceeded)
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258 {
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259 errors << tr("Could not save: %1").arg(file.errorString());
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260 return false;
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261 }
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262 else
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263 {
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264 return true;
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265 }
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266 }
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267 else
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268 {
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269 errors << tr("Could not open %1 for writing: %2")
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270 .arg(file.fileName())
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271 .arg(file.errorString());
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272 return false;
147
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273 }
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274 }
148
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275 else
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276 {
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277 errors << tr("Bad model ID %1").arg(modelId.value);
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278 return false;
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279 }
147
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280 }
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281
148
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282 /**
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283 * @brief Searches the open models for the specified model and returns its id if found
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284 * @param model model to look for
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285 * @return id or no value if not found
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286 */
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287 std::optional<ModelId> DocumentManager::findIdForModel(const Model *model) const
147
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288 {
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289 std::optional<ModelId> result;
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290 for (auto it = this->openModels.begin(); it != this->openModels.end(); ++it)
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291 {
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292 if (it->second.model.get() == model)
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293 {
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294 result = it->first;
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295 break;
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296 }
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297 }
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298 return result;
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299 }
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300
150
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301 PolygonCache *DocumentManager::getPolygonCacheForModel(ModelId modelId)
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302 {
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303 auto it = this->polygonCaches.find(modelId);
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304 if (it != this->polygonCaches.end())
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305 {
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306 return &it->second;
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307 }
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308 else
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309 {
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310 return nullptr;
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311 }
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312 }
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313
148
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314 /**
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315 * @brief Cleans up and erases models that are no longer required.
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316 */
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317 void DocumentManager::prune()
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318 {
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319 for (auto it = this->openModels.begin(); it != this->openModels.end(); ++it)
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320 {
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321 // Find models that are not edited by the user and are not needed by any other model
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322 if (true
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323 and it->second.opentype == OpenType::AutomaticallyOpened
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324 and not this->isReferencedByAnything(it->first)
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325 ) {
150
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326 // Remove its polygon cache
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327 const auto polygonCache = this->polygonCaches.find(it->first);
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328 if (polygonCache != this->polygonCaches.end())
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329 {
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330 this->polygonCaches.erase(polygonCache);
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331 }
148
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332 // Remove the model
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333 this->openModels.erase(it);
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334 // We need to start over now. It is possible that other models that previously
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335 // were referenced by the model we just erased have become prunable.
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336 // Moreover, our iterator is invalid now and we cannot continue in this for loop.
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337 this->prune();
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338 break;
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339 }
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340 }
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341 }
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342
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343 /**
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344 * @brief Finds out whether the specified model id is referenced by any other model
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345 * @param modelId
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346 * @returns bool
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347 */
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348 bool DocumentManager::isReferencedByAnything(const ModelId modelId) const
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349 {
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350 for (auto& haystackModelPair : this->openModels)
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351 {
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352 if (haystackModelPair.first != modelId)
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353 {
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354 for (auto& dependencyPair : haystackModelPair.second.dependencies)
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355 {
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356 if (dependencyPair.second == modelId)
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357 {
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358 return true;
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359 }
147
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360 }
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361 }
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362 }
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363 return false;
147
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364 }
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365
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366 void DocumentManager::makePolygonCacheForModel(const ModelId modelId)
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367 {
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368 Model* model = this->getModelById(modelId);
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369 if (model != nullptr)
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370 {
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371 this->polygonCaches[modelId] = {};
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372 connect(model, &Model::dataChanged, this, &DocumentManager::modelModified);
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373 connect(model, &Model::rowsInserted, this, &DocumentManager::modelModified);
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374 connect(model, &Model::rowsRemoved, this, &DocumentManager::modelModified);
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375 }
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376 }
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377
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378 void DocumentManager::modelModified()
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379 {
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380 Model* const model = qobject_cast<Model*>(this->sender());
194
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381 const std::optional<ModelId> modelId = this->findIdForModel(model);
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382 if (modelId.has_value()) {
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383 this->polygonCaches[*modelId].needRecache = true;
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384 }
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385 }
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386
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387 static QString findFile(QString referenceName, const QString& path, const LibraryManager& libraries)
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388 {
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389 // Try to find the file in the same place as the model itself
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390 referenceName.replace("\\", "/");
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391 const QDir dir = QFileInfo{path}.dir();
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392 QString referencedFilePath = dir.filePath(referenceName);
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393 if (not QFileInfo{referencedFilePath}.exists())
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394 {
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395 // Look for it in the libraries
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396 referencedFilePath = libraries.findFile(referenceName);
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397 }
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398 return referencedFilePath;
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399 }
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400
200
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401 template<typename T>
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402 void iterate(const Model& model, std::function<void(const T&)> fn)
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403 {
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404 for (int i = 0; i < model.size(); ++i) {
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405 if (std::holds_alternative<T>(model[i])) {
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406 fn(std::get<T>(model[i]));
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407 }
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408 }
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409 }
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410
12
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411 void DocumentManager::loadDependenciesForModel(
148
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412 const ModelId modelId,
23
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413 const QString &path,
148
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414 LoadDepedenciesBag& bag)
12
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415 {
148
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416 QSet<QString> failedToOpen;
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417 struct LoadingError
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418 {
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419 QString message;
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420 };
148
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421 bag.processed.insert(modelId);
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422 if (not this->openModels.contains(modelId))
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423 {
148
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424 bag.errorStream << tr("bad model ID %1").arg(modelId.value);
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425 return;
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426 }
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427 ModelInfo& modelInfo = this->openModels[modelId];
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428 modelInfo.dependencies.clear();
200
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diff changeset
429 iterate<Colored<SubfileReference>>(*modelInfo.model, [&](const SubfileReference& ref) {
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430 const QString referenceName = ref.name;
12
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431 if (not referenceName.isEmpty()
148
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432 and modelInfo.dependencies.count(referenceName) == 0
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433 and not failedToOpen.contains(referenceName))
12
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434 {
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diff changeset
435 try
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436 {
148
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437 const QString referencedFilePath = ::findFile(referenceName, path, bag.libraries);
23
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438 if (referencedFilePath.isEmpty())
12
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439 {
148
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440 throw LoadingError{tr("could not find '%1'").arg(referenceName)};
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441 }
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442 QString loadErrorString;
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443 QTextStream localErrorStream{&loadErrorString};
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444 const std::optional<ModelId> modelIdOpt = this->openModel(
147
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445 referencedFilePath,
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446 localErrorStream,
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447 OpenType::AutomaticallyOpened);
148
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448 if (not modelIdOpt.has_value())
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449 {
148
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450 const QString& errorMessage = tr("could not load '%1': %2")
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451 .arg(referencedFilePath)
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452 .arg(loadErrorString);
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453 throw LoadingError{errorMessage};
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454 }
148
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455 modelInfo.dependencies[referenceName] = modelIdOpt.value();
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456 if (not bag.processed.contains(modelIdOpt.value()))
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457 {
148
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458 this->loadDependenciesForModel(modelIdOpt.value(), referencedFilePath, bag);
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459 }
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diff changeset
460 }
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diff changeset
461 catch(const LoadingError& error)
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462 {
148
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463 bag.errorStream << error.message << "\n";
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diff changeset
464 failedToOpen.insert(referenceName);
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diff changeset
465 bag.missing.append(referenceName);
12
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diff changeset
466 }
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diff changeset
467 }
200
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diff changeset
468 });
12
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diff changeset
469 }

mercurial