summaryrefslogtreecommitdiffstats
path: root/src/config.h
blob: 5ed8bc40ebabb2f31f99fef7616f3cf59961445c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
/******************************************************************************
 *
 * 
 *
 *
 * Copyright (C) 1997-2012 by Dimitri van Heesch.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation under the terms of the GNU General Public License is hereby 
 * granted. No representations are made about the suitability of this software 
 * for any purpose. It is provided "as is" without express or implied warranty.
 * See the GNU General Public License for more details.
 *
 * Documents produced by Doxygen are derivative works derived from the
 * input used in their production; they are not affected by this license.
 *
 */

#ifndef CONFIG_H
#define CONFIG_H

#include <qstrlist.h>
#include <qdict.h>
#include <qlist.h>
#include "ftextstream.h"


/** Abstract base class for any configuration option.
 */
class ConfigOption
{
    friend class Config;

  public:

    /*! The type of option */
    enum OptionType 
    { 
      O_Info,      //<! A section header
      O_List,      //<! A list of items
      O_Enum,      //<! A fixed set of items
      O_String,    //<! A single item
      O_Int,       //<! An integer value
      O_Bool,      //<! A boolean value
      O_Obsolete   //<! An obsolete option
    };
    enum 
    { 
     /*! Maximum length of an option in the config file. Used for 
      *  alignment purposes.
      */
      MAX_OPTION_LENGTH = 23  
    };
    ConfigOption(OptionType t) : m_kind(t) 
    {
      m_spaces.fill(' ',40);
    }
    virtual ~ConfigOption()
    {
    }

    /*! returns the kind of option this is. */
    OptionType kind() const { return m_kind; }
    QCString name() const { return m_name; }
    QCString docs() const { return m_doc; }

    QCString dependsOn() const { return m_dependency; }
    void addDependency(const char *dep) { m_dependency = dep; }
    void setEncoding(const QCString &e) { m_encoding = e; }

  protected:
    virtual void writeTemplate(FTextStream &t,bool sl,bool upd) = 0;
    virtual void convertStrToVal() {}
    virtual void substEnvVars() = 0;
    virtual void writeXML(FTextStream&) {}
    virtual void init() {}

    QCString convertToComment(const QCString &s);
    void writeBoolValue(FTextStream &t,bool v);
    void writeIntValue(FTextStream &t,int i);
    void writeStringValue(FTextStream &t,QCString &s);
    void writeStringList(FTextStream &t,QStrList &l);

    QCString m_spaces;
    QCString m_name;
    QCString m_doc;
    QCString m_dependency;
    QCString m_encoding;
    OptionType m_kind;
};

/** Section marker for grouping the configuration options.
 */
class ConfigInfo : public ConfigOption
{
  public:
    ConfigInfo(const char *name,const char *doc) 
      : ConfigOption(O_Info)
    {
      m_name = name;
      m_doc = doc;
    }
    void writeTemplate(FTextStream &t, bool sl,bool)
    {
      if (!sl)
      {
        t << "\n";
      }
      t << "#---------------------------------------------------------------------------\n";
      t << "# " << m_doc << endl;
      t << "#---------------------------------------------------------------------------\n";
    }
    void substEnvVars() {}
};

/** Class respresenting a list type option.
 */
class ConfigList : public ConfigOption
{
  public:
    enum WidgetType { String, File, Dir, FileAndDir };
    ConfigList(const char *name,const char *doc) 
      : ConfigOption(O_List)
    {
      m_name = name;
      m_doc = doc;
      m_widgetType = String;
    }
    void addValue(const char *v) { m_value.append(v); }
    void setWidgetType(WidgetType w) { m_widgetType = w; }
    WidgetType widgetType() const { return m_widgetType; }
    QStrList *valueRef() { return &m_value; }
    void writeTemplate(FTextStream &t,bool sl,bool)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "=";
      writeStringList(t,m_value);
      t << "\n";
    }
    void substEnvVars();
    void writeXML(FTextStream&);
    void init() { m_value.clear(); }
  private:
    QStrList m_value;
    WidgetType m_widgetType;
};

/** Class representing an enum type option.
 */
class ConfigEnum : public ConfigOption
{
  public:
    ConfigEnum(const char *name,const char *doc,const char *defVal) 
      : ConfigOption(O_Enum)
    {
      m_name = name;
      m_doc = doc;
      m_value = defVal;
      m_defValue = defVal;
    }
    void addValue(const char *v) { m_valueRange.append(v); }
    QStrListIterator iterator() 
    {
      return QStrListIterator(m_valueRange);
    }
    QCString *valueRef() { return &m_value; }
    void substEnvVars();
    void writeTemplate(FTextStream &t,bool sl,bool)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "=";
      writeStringValue(t,m_value);
      t << "\n";
    }
    void writeXML(FTextStream&);
    void init() { m_value = m_defValue.copy(); }

  private:
    QStrList m_valueRange;
    QCString m_value;
    QCString m_defValue;
};

/** Class representing a string type option.
 */
class ConfigString : public ConfigOption
{
  public:
    enum WidgetType { String, File, Dir };
    ConfigString(const char *name,const char *doc) 
      : ConfigOption(O_String)
    {
      m_name = name;
      m_doc = doc;
      m_widgetType = String;
    }
   ~ConfigString()
    {
    }
    void setWidgetType(WidgetType w) { m_widgetType = w; }
    WidgetType widgetType() const { return m_widgetType; }
    void setDefaultValue(const char *v) { m_defValue = v; }
    QCString *valueRef() { return &m_value; }
    void writeTemplate(FTextStream &t,bool sl,bool)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "=";
      writeStringValue(t,m_value);
      t << "\n";
    }
    void substEnvVars();
    void writeXML(FTextStream&);
    void init() { m_value = m_defValue.copy(); }
  
  private:
    QCString m_value;
    QCString m_defValue;
    WidgetType m_widgetType;
};

/** Class representing an integer type option.
 */
class ConfigInt : public ConfigOption
{
  public:
    ConfigInt(const char *name,const char *doc,int minVal,int maxVal,int defVal) 
      : ConfigOption(O_Int)
    {
      m_name = name;
      m_doc = doc;
      m_value = defVal;
      m_defValue = defVal;
      m_minVal = minVal;
      m_maxVal = maxVal;
    }
    QCString *valueStringRef() { return &m_valueString; }
    int *valueRef() { return &m_value; }
    int minVal() const { return m_minVal; }
    int maxVal() const { return m_maxVal; }
    void convertStrToVal();
    void substEnvVars();
    void writeTemplate(FTextStream &t,bool sl,bool upd)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "=";
      if (upd && !m_valueString.isEmpty())
      {
        writeStringValue(t,m_valueString);
      }
      else
      {
        writeIntValue(t,m_value);
      }
      t << "\n";
    }
    void writeXML(FTextStream&);
    void init() { m_value = m_defValue; }
  private:
    int m_value;
    int m_defValue;
    int m_minVal;
    int m_maxVal;
    QCString m_valueString;
};

/** Class representing a Boolean type option.
 */
class ConfigBool : public ConfigOption
{
  public:
    ConfigBool(const char *name,const char *doc,bool defVal) 
      : ConfigOption(O_Bool)
    {
      m_name = name;
      m_doc = doc;
      m_value = defVal;
      m_defValue = defVal;
    }
    QCString *valueStringRef() { return &m_valueString; }
    bool *valueRef() { return &m_value; }
    void convertStrToVal();
    void substEnvVars();
    void setValueString(const QCString &v) { m_valueString = v; }
    void writeTemplate(FTextStream &t,bool sl,bool upd)
    {
      if (!sl)
      {
        t << endl;
        t << convertToComment(m_doc);
        t << endl;
      }
      t << m_name << m_spaces.left(MAX_OPTION_LENGTH-m_name.length()) << "=";
      if (upd && !m_valueString.isEmpty())
      {
        writeStringValue(t,m_valueString);
      }
      else
      {
        writeBoolValue(t,m_value);
      }
      t << "\n";
    }
    void writeXML(FTextStream&);
    void init() { m_value = m_defValue; }
  private:
    bool m_value;
    bool m_defValue;
    QCString m_valueString;
};

/** Section marker for obsolete options
 */
class ConfigObsolete : public ConfigOption
{
  public:
    ConfigObsolete(const char *name,OptionType t) : ConfigOption(t)  
    { m_name = name; }
    void writeTemplate(FTextStream &,bool,bool) {}
    void substEnvVars() {}
    void writeXML(FTextStream&);
};


// some convenience macros
#define Config_getString(val)  Config::instance()->getString(__FILE__,__LINE__,val)
#define Config_getInt(val)     Config::instance()->getInt(__FILE__,__LINE__,val)
#define Config_getList(val)    Config::instance()->getList(__FILE__,__LINE__,val)
#define Config_getEnum(val)    Config::instance()->getEnum(__FILE__,__LINE__,val)
#define Config_getBool(val)    Config::instance()->getBool(__FILE__,__LINE__,val)

/** Singleton for configuration variables.
 *
 *  This object holds the global static variables
 *  read from a user-supplied configuration file.
 *  The static member instance() can be used to get
 *  a pointer to the one and only instance.
 *  
 *  Set all variables to their default values by
 *  calling Config::instance()->init()
 *
 */
class Config
{
  public:
    /////////////////////////////
    // public API
    /////////////////////////////

    /*! Returns the one and only instance of this class */
    static Config *instance()
    {
      if (m_instance==0) m_instance = new Config;
      return m_instance;
    }
    /*! Delete the instance */
    static void deleteInstance()
    {
      delete m_instance;
      m_instance=0;
    }
    
    /*! Returns an iterator that can by used to iterate over the 
     *  configuration options.
     */
    QListIterator<ConfigOption> iterator()
    {
      return QListIterator<ConfigOption>(*m_options);
    }

    /*! 
     *  @name Getting configuration values.
     *  @{
     */

    /*! Returns the value of the string option with name \a fileName. 
     *  The arguments \a num and \a name are for debugging purposes only.
     *  There is a convenience function Config_getString() for this.
     */
    QCString &getString(const char *fileName,int num,const char *name) const;

    /*! Returns the value of the list option with name \a fileName. 
     *  The arguments \a num and \a name are for debugging purposes only.
     *  There is a convenience function Config_getList() for this.
     */
    QStrList &getList(const char *fileName,int num,const char *name) const;

    /*! Returns the value of the enum option with name \a fileName. 
     *  The arguments \a num and \a name are for debugging purposes only.
     *  There is a convenience function Config_getEnum() for this.
     */
    QCString &getEnum(const char *fileName,int num,const char *name) const;

    /*! Returns the value of the integer option with name \a fileName. 
     *  The arguments \a num and \a name are for debugging purposes only.
     *  There is a convenience function Config_getInt() for this.
     */
    int      &getInt(const char *fileName,int num,const char *name) const;

    /*! Returns the value of the boolean option with name \a fileName. 
     *  The arguments \a num and \a name are for debugging purposes only.
     *  There is a convenience function Config_getBool() for this.
     */
    bool     &getBool(const char *fileName,int num,const char *name) const;

    /*! Returns the ConfigOption corresponding with \a name or 0 if
     *  the option is not supported.
     */
    ConfigOption *get(const char *name) const
    {
      return m_dict->find(name); 
    }
    /* @} */

    /*! 
     *  @name Adding configuration options. 
     *  @{
     */

    /*! Starts a new configuration section with \a name and description \a doc.
     *  \returns An object representing the option.
     */
    ConfigInfo   *addInfo(const char *name,const char *doc)
    {
      ConfigInfo *result = new ConfigInfo(name,doc);
      m_options->append(result);
      return result;
    }

    /*! Adds a new string option with \a name and documentation \a doc.
     *  \returns An object representing the option.
     */
    ConfigString *addString(const char *name,
                            const char *doc)
    {
      ConfigString *result = new ConfigString(name,doc);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }

    /*! Adds a new enumeration option with \a name and documentation \a doc
     *  and initial value \a defVal. 
     *  \returns An object representing the option.
     */
    ConfigEnum   *addEnum(const char *name,
                          const char *doc,
                          const char *defVal)
    {
      ConfigEnum *result = new ConfigEnum(name,doc,defVal);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }

    /*! Adds a new string option with \a name and documentation \a doc.
     *  \returns An object representing the option.
     */
    ConfigList   *addList(const char *name,
                          const char *doc)
    {
      ConfigList *result = new ConfigList(name,doc);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }

    /*! Adds a new integer option with \a name and documentation \a doc.
     *  The integer has a range between \a minVal and \a maxVal and a
     *  default value of \a defVal.
     *  \returns An object representing the option.
     */
    ConfigInt    *addInt(const char *name,
                         const char *doc,
                         int minVal,int maxVal,int defVal)
    {
      ConfigInt *result = new ConfigInt(name,doc,minVal,maxVal,defVal);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }

    /*! Adds a new boolean option with \a name and documentation \a doc.
     *  The boolean has a default value of \a defVal.
     *  \returns An object representing the option.
     */
    ConfigBool   *addBool(const char *name,
                          const char *doc,
                          bool defVal)
    {
      ConfigBool *result = new ConfigBool(name,doc,defVal);
      m_options->append(result);
      m_dict->insert(name,result);
      return result;
    }
    /*! Adds an option that has become obsolete. */
    ConfigOption *addObsolete(const char *name)
    {
      ConfigObsolete *option = new ConfigObsolete(name,ConfigOption::O_Obsolete);
      m_dict->insert(name,option);
      m_obsolete->append(option);
      return option;
    }
    /*! @} */

    /*! Writes a template configuration to stream \a t. If \a shortIndex
     *  is \c TRUE the description of each configuration option will
     *  be omitted.
     */
    void writeTemplate(FTextStream &t,bool shortIndex,bool updateOnly);

    /** Write XML representation of the config file */
    void writeXML(FTextStream &t);

    /////////////////////////////
    // internal API
    /////////////////////////////

    /*! Converts the string values read from the configuration file
     *  to real values for non-string type options (like int, and bools)
     */
    void convertStrToVal();

    /*! Replaces references to environment variable by the actual value
     *  of the environment variable.
     */
    void substituteEnvironmentVars();

    /*! Checks if the values of the variable are correct, adjusts them
     *  if needed, and report any errors.
     */
    void check();

    /*! Initialize config variables to their default value */
    void init();

    /*! Parse a configuration data in string \a str.
     *  \returns TRUE if successful, or FALSE if the string could not be
     *  parsed.
     */ 
    bool parseString(const char *fn,const char *str);

    /*! Parse a configuration file with name \a fn.
     *  \returns TRUE if successful, FALSE if the file could not be 
     *  opened or read.
     */ 
    bool parse(const char *fn);

    /*! Called from the constructor, will add doxygen's default options
     *  to the configuration object 
     */
    void create();

  protected:

    Config()
    { 
      m_options  = new QList<ConfigOption>;
      m_obsolete = new QList<ConfigOption>;
      m_dict     = new QDict<ConfigOption>(257);
      m_options->setAutoDelete(TRUE);
      m_obsolete->setAutoDelete(TRUE);
      m_initialized = FALSE;
      create();
    }
   ~Config()
    {
      delete m_options;
      delete m_obsolete;
      delete m_dict;
    }

  private:
    QList<ConfigOption> *m_options;
    QList<ConfigOption> *m_obsolete;
    QDict<ConfigOption> *m_dict;
    static Config *m_instance;
    bool m_initialized;
};

#endif