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1 | 1 | #include <Plugin/PluginManager.h> |
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2 | 2 | |
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3 | 3 | #include <Plugin/IPlugin.h> |
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4 | 4 | |
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5 | 5 | #include <QDir> |
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6 | 6 | #include <QLibrary> |
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7 | 7 | #include <QPluginLoader> |
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8 | 8 | |
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9 | 9 | Q_LOGGING_CATEGORY(LOG_PluginManager, "PluginManager") |
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10 | 10 | |
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11 | 11 | namespace { |
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12 | 12 | |
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13 | 13 | /// Key for retrieving metadata of the plugin |
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14 | 14 | const auto PLUGIN_METADATA_KEY = QStringLiteral("MetaData"); |
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15 | 15 | |
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16 | 16 | /// Key for retrieving the name of the plugin in its metadata |
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17 | 17 | const auto PLUGIN_NAME_KEY = QStringLiteral("name"); |
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18 | 18 | |
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19 | 19 | /// Helper to state the plugin loading operation |
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20 | 20 | struct LoadPluginState { |
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21 | 21 | explicit LoadPluginState(const QString &pluginPath) |
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22 | 22 | : m_PluginPath{pluginPath}, m_Valid{true}, m_ErrorMessage{} |
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23 | 23 | { |
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24 | 24 | } |
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25 | 25 | |
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26 | 26 | void log() const |
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27 | 27 | { |
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28 | 28 | if (m_Valid) { |
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29 | 29 | qCDebug(LOG_PluginManager()) |
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30 | 30 | << QObject::tr("File '%1' has been loaded as a plugin").arg(m_PluginPath); |
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31 | 31 | } |
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32 | 32 | else { |
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33 | 33 | qCWarning(LOG_PluginManager()) |
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34 | 34 | << QObject::tr("File '%1' can't be loaded as a plugin: %2") |
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35 | 35 | .arg(m_PluginPath) |
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36 | 36 | .arg(m_ErrorMessage); |
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37 | 37 | } |
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38 | 38 | } |
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39 | 39 | |
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40 | 40 | void setError(const QString &errorMessage) |
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41 | 41 | { |
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42 | 42 | m_Valid = false; |
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43 | 43 | m_ErrorMessage = errorMessage; |
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44 | 44 | } |
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45 | 45 | |
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46 | 46 | QString m_PluginPath; |
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47 | 47 | bool m_Valid; |
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48 | 48 | QString m_ErrorMessage; |
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49 | 49 | }; |
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50 | 50 | |
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51 | 51 | } // namespace |
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52 | 52 | |
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53 | 53 | struct PluginManager::PluginManagerPrivate { |
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54 | 54 | /** |
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55 | 55 | * Loads a single plugin into SciQlop. The method has no effect if the plugin is malformed (e.g. |
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56 | 56 | * wrong library type, missing metadata, etc.) |
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57 | 57 | * @param pluginPath the path to the plugin library. |
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58 | 58 | */ |
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59 | 59 | void loadPlugin(const QString &pluginPath) |
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60 | 60 | { |
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61 | 61 | qCDebug(LOG_PluginManager()) |
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62 | 62 | << QObject::tr("Attempting to load file '%1' as a plugin").arg(pluginPath); |
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63 | 63 | |
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64 | 64 | LoadPluginState loadState{pluginPath}; |
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65 | 65 | |
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66 | 66 | if (QLibrary::isLibrary(pluginPath)) { |
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67 | 67 | QPluginLoader pluginLoader{pluginPath}; |
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68 | 68 | |
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69 | 69 | // Retrieving the plugin name to check if it can be loaded (i.e. no plugin with the same |
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70 | 70 | // name has been registered yet) |
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71 | 71 | auto metadata = pluginLoader.metaData().value(PLUGIN_METADATA_KEY).toObject(); |
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72 | 72 | auto pluginName = metadata.value(PLUGIN_NAME_KEY).toString(); |
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73 | 73 | |
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74 | 74 | if (pluginName.isEmpty()) { |
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75 | 75 | loadState.setError(QObject::tr("empty file name")); |
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76 | 76 | } |
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77 | 77 | else if (m_RegisteredPlugins.contains(pluginName)) { |
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78 | 78 | loadState.setError(QObject::tr("name '%1' already registered").arg(pluginName)); |
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79 | 79 | } |
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80 | 80 | else { |
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81 | 81 | if (auto pluginInstance = qobject_cast<IPlugin *>(pluginLoader.instance())) { |
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82 | 82 | pluginInstance->initialize(); |
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83 | 83 | m_RegisteredPlugins.insert(pluginName, pluginPath); |
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84 | 84 | } |
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85 | 85 | else { |
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86 | 86 | loadState.setError(QObject::tr("the file is not a Sciqlop plugin")); |
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87 | 87 | } |
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88 | 88 | } |
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89 | 89 | } |
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90 | 90 | else { |
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91 | 91 | loadState.setError(QObject::tr("the file is not a library")); |
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92 | 92 | } |
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93 | 93 | |
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94 | 94 | // Log loading result |
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95 | 95 | loadState.log(); |
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96 | 96 | } |
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97 | 97 | |
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98 | 98 | /// Registered plugins (key: plugin name, value: plugin path) |
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99 | 99 | QHash<QString, QString> m_RegisteredPlugins; |
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100 | 100 | }; |
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101 | 101 | |
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102 | 102 | PluginManager::PluginManager() : impl{spimpl::make_unique_impl<PluginManagerPrivate>()} |
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103 | 103 | { |
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104 | 104 | } |
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105 | 105 | |
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106 | 106 | void PluginManager::loadPlugins(const QDir &pluginDir) |
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107 | 107 | { |
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108 | 108 | // Load plugins |
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109 | 109 | auto pluginInfoList |
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110 | 110 | = pluginDir.entryInfoList(QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot, QDir::Name); |
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111 | 111 | for (auto entryInfo : qAsConst(pluginInfoList)) { |
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112 | if (entryInfo.isDir()) | |
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112 | if (entryInfo.isDir()) { | |
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113 | 113 | this->loadPlugins(QDir{entryInfo.absoluteFilePath()}); |
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114 |
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115 |
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116 |
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114 | } | |
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115 | else if (QLibrary::isLibrary(entryInfo.absoluteFilePath())) { | |
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116 | impl->loadPlugin(entryInfo.absoluteFilePath()); | |
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117 | 117 | } |
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118 | 118 | } |
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119 | 119 | } |
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120 | 120 | |
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121 | 121 | int PluginManager::nbPluginsLoaded() const noexcept |
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122 | 122 | { |
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123 | 123 | return impl->m_RegisteredPlugins.size(); |
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124 | 124 | } |
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