KiCad PCB EDA Suite
json_settings.h
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1 /*
2  * This program source code file is part of KiCad, a free EDA CAD application.
3  *
4  * Copyright (C) 2020 Jon Evans <[email protected]>
5  * Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
6  *
7  * This program is free software: you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the
9  * Free Software Foundation, either version 3 of the License, or (at your
10  * option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program. If not, see <http://www.gnu.org/licenses/>.
19  */
20 
21 #ifndef _JSON_SETTINGS_H
22 #define _JSON_SETTINGS_H
23 
24 #include <core/wx_stl_compat.h>
25 
26 #include <utility>
27 #include <wx/string.h>
28 
29 #include <core/optional.h>
30 #include <nlohmann/json_fwd.hpp>
31 
32 class wxConfigBase;
33 class NESTED_SETTINGS;
34 class PARAM_BASE;
35 class SETTINGS_MANAGER;
36 
44 extern const wxChar* const traceSettings;
45 
46 enum class SETTINGS_LOC {
47  USER,
48  PROJECT,
49  COLORS,
50  NESTED,
51  NONE,
52 };
53 
54 
57 
59 {
60 public:
61  friend class NESTED_SETTINGS;
62 
63  JSON_SETTINGS( const wxString& aFilename, SETTINGS_LOC aLocation, int aSchemaVersion ) :
64  JSON_SETTINGS( aFilename, aLocation, aSchemaVersion, true, true, true )
65  {}
66 
67  JSON_SETTINGS( const wxString& aFilename, SETTINGS_LOC aLocation, int aSchemaVersion,
68  bool aCreateIfMissing, bool aCreateIfDefault, bool aWriteFile );
69 
70  virtual ~JSON_SETTINGS();
71 
72  wxString GetFilename() const { return m_filename; }
73 
74  wxString GetFullFilename() const;
75 
76  void SetFilename( const wxString& aFilename ) { m_filename = aFilename; }
77 
78  void SetLocation( SETTINGS_LOC aLocation ) { m_location = aLocation; }
79  SETTINGS_LOC GetLocation() const { return m_location; }
80 
81  void SetLegacyFilename( const wxString& aFilename ) { m_legacy_filename = aFilename; }
82 
83  bool IsReadOnly() const { return !m_writeFile; }
84  void SetReadOnly( bool aReadOnly ) { m_writeFile = !aReadOnly; }
85 
91  nlohmann::json& At( const std::string& aPath );
92  bool Contains( const std::string& aPath ) const;
93  size_t Count( const std::string& aPath ) const;
94 
96 
100  virtual void Load();
101 
107  virtual bool Store();
108 
114  virtual bool LoadFromFile( const wxString& aDirectory = "" );
115 
121  virtual bool SaveToFile( const wxString& aDirectory = "", bool aForce = false );
122 
126  void ResetToDefaults();
127 
134  OPT<nlohmann::json> GetJson( const std::string& aPath ) const;
135 
143  template<typename ValueType>
144  OPT<ValueType> Get( const std::string& aPath ) const;
145 
153  template<typename ValueType>
154  void Set( const std::string& aPath, ValueType aVal );
155 
165  bool Migrate();
166 
173  virtual bool MigrateFromLegacy( wxConfigBase* aLegacyConfig );
174 
183  void AddNestedSettings( NESTED_SETTINGS* aSettings );
184 
189  void ReleaseNestedSettings( NESTED_SETTINGS* aSettings );
190 
191  void SetManager( SETTINGS_MANAGER* aManager )
192  {
193  m_manager = aManager;
194  }
195 
202  static bool SetIfPresent( const nlohmann::json& aObj, const std::string& aPath,
203  wxString& aTarget );
204 
211  static bool SetIfPresent( const nlohmann::json& aObj, const std::string& aPath, bool& aTarget );
212 
219  static bool SetIfPresent( const nlohmann::json& aObj, const std::string& aPath, int& aTarget );
220 
227  static bool SetIfPresent( const nlohmann::json& aObj, const std::string& aPath,
228  unsigned int& aTarget );
229 protected:
230 
239  void registerMigration( int aOldSchemaVersion, int aNewSchemaVersion,
240  std::function<bool(void)> aMigrator );
241 
249  template<typename ValueType>
250  bool fromLegacy( wxConfigBase* aConfig, const std::string& aKey, const std::string& aDest );
251 
258  bool fromLegacyString( wxConfigBase* aConfig, const std::string& aKey,
259  const std::string& aDest );
260 
267  bool fromLegacyColor( wxConfigBase* aConfig, const std::string& aKey,
268  const std::string& aDest );
269 
270  virtual wxString getFileExt() const
271  {
272  return wxT( "json" );
273  }
274 
275  virtual wxString getLegacyFileExt() const
276  {
277  return wxEmptyString;
278  }
279 
281  wxString m_filename;
282 
285 
288 
290  std::vector<PARAM_BASE*> m_params;
291 
293  std::vector<NESTED_SETTINGS*> m_nested_settings;
294 
297 
303 
306 
309 
312 
315 
318 
320  std::map<int, std::pair<int, std::function<bool()>>> m_migrators;
321 
322  std::unique_ptr<JSON_SETTINGS_INTERNALS> m_internals;
323 };
324 
325 // Specializations to allow conversion between wxString and std::string via JSON_SETTINGS API
326 
327 template<> OPT<wxString> JSON_SETTINGS::Get( const std::string& aPath ) const;
328 
329 template<> void JSON_SETTINGS::Set<wxString>( const std::string& aPath, wxString aVal );
330 
331 // Specializations to allow directly reading/writing wxStrings from JSON
332 
333 void to_json( nlohmann::json& aJson, const wxString& aString );
334 
335 void from_json( const nlohmann::json& aJson, wxString& aString );
336 
337 #endif
void ResetToDefaults()
Resets all parameters to default values.
void Set(const std::string &aPath, ValueType aVal)
Stores a value into the JSON document Will throw an exception if ValueType isn't something that the l...
virtual bool Store()
Stores the current parameters into the JSON document represented by this object Note: this doesn't do...
JSON_SETTINGS_INTERNALS * Internals()
std::vector< PARAM_BASE * > m_params
The list of parameters (owned by this object)
void from_json(const nlohmann::json &aJson, wxString &aString)
bool m_createIfMissing
Whether or not the backing store file should be created it if doesn't exist.
void SetReadOnly(bool aReadOnly)
Definition: json_settings.h:84
wxString GetFilename() const
Definition: json_settings.h:72
virtual wxString getLegacyFileExt() const
SETTINGS_LOC
Definition: json_settings.h:46
virtual bool LoadFromFile(const wxString &aDirectory="")
Loads the backing file from disk and then calls Load()
OPT< nlohmann::json > GetJson(const std::string &aPath) const
Fetches a JSON object that is a subset of this JSON_SETTINGS object, using a path of the form "key1....
wxString GetFullFilename() const
nlohmann::json json
Definition: gerbview.cpp:41
nlohmann::json & At(const std::string &aPath)
Wrappers for the underlying JSON API so that most consumers don't need json.hpp All of these function...
void AddNestedSettings(NESTED_SETTINGS *aSettings)
Transfers ownership of a given NESTED_SETTINGS to this object.
bool m_deleteLegacyAfterMigration
Whether or not to delete legacy file after migration.
void to_json(nlohmann::json &aJson, const wxString &aString)
The color scheme directory (e.g. ~/.config/kicad/colors/)
std::map< int, std::pair< int, std::function< bool()> > > m_migrators
A map of starting schema version to a pair of <ending version, migrator function>
wxString m_filename
The filename (not including path) of this settings file (inicode)
bool Migrate()
Migrates the schema of this settings from the version in the file to the latest version.
NESTED_SETTINGS is a JSON_SETTINGS that lives inside a JSON_SETTINGS.
virtual bool SaveToFile(const wxString &aDirectory="", bool aForce=false)
wxString m_legacy_filename
The filename of the wxConfig legacy file (if different from m_filename)
The settings directory inside a project folder.
std::unique_ptr< JSON_SETTINGS_INTERNALS > m_internals
SETTINGS_LOC GetLocation() const
Definition: json_settings.h:79
static bool SetIfPresent(const nlohmann::json &aObj, const std::string &aPath, wxString &aTarget)
Sets the given string if the given key/path is present.
void SetManager(SETTINGS_MANAGER *aManager)
std::vector< NESTED_SETTINGS * > m_nested_settings
Nested settings files that live inside this one, if any.
No directory prepended, full path in filename (used for PROJECT_FILE)
JSON_SETTINGS(const wxString &aFilename, SETTINGS_LOC aLocation, int aSchemaVersion)
Definition: json_settings.h:63
SETTINGS_LOC m_location
The location of this settings file (.
Not stored in a file, but inside another JSON_SETTINGS.
bool fromLegacyString(wxConfigBase *aConfig, const std::string &aKey, const std::string &aDest)
Translates a legacy wxConfig string value to a given JSON pointer value.
bool m_resetParamsIfMissing
Whether or not to set parameters to their default value if missing from JSON on Load()
bool fromLegacyColor(wxConfigBase *aConfig, const std::string &aKey, const std::string &aDest)
Translates a legacy COLOR4D stored in a wxConfig string to a given JSON pointer value.
void registerMigration(int aOldSchemaVersion, int aNewSchemaVersion, std::function< bool(void)> aMigrator)
Registers a migration from one schema version to another.
OPT< ValueType > Get(const std::string &aPath) const
Fetches a value from within the JSON document.
The main config directory (e.g. ~/.config/kicad/)
bool IsReadOnly() const
Definition: json_settings.h:83
boost::optional< T > OPT
Definition: optional.h:7
bool fromLegacy(wxConfigBase *aConfig, const std::string &aKey, const std::string &aDest)
Translates a legacy wxConfig value to a given JSON pointer value.
void SetLocation(SETTINGS_LOC aLocation)
Definition: json_settings.h:78
bool Contains(const std::string &aPath) const
virtual ~JSON_SETTINGS()
const wxChar *const traceSettings
Flag to enable debug output of settings operations and management.
void SetFilename(const wxString &aFilename)
Definition: json_settings.h:76
bool m_createIfDefault
Whether or not the backing store file should be created if all parameters are still at their default ...
void ReleaseNestedSettings(NESTED_SETTINGS *aSettings)
Saves and frees a nested settings object, if it exists within this one.
SETTINGS_MANAGER * m_manager
A pointer to the settings manager managing this file (may be null)
virtual wxString getFileExt() const
virtual bool MigrateFromLegacy(wxConfigBase *aLegacyConfig)
Migrates from wxConfig to JSON-based configuration.
void SetLegacyFilename(const wxString &aFilename)
Definition: json_settings.h:81
int m_schemaVersion
Version of this settings schema.
virtual void Load()
Updates the parameters of this object based on the current JSON document contents.
size_t Count(const std::string &aPath) const
bool m_writeFile
Whether or not the backing store file should be written.