summaryrefslogtreecommitdiff
path: root/app/wlib/gtklib/wpref.c
blob: 124305a46ba968a7e6ea0ef233f5bb9e9765b36b (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
/** \file wpref.c
 * Handle loading and saving preferences.
 */

/*  XTrkCad - Model Railroad CAD
 *  Copyright (C) 2005 Dave Bullis
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <dirent.h>
#include <sys/stat.h>

#define GTK_DISABLE_SINGLE_INCLUDES
#define GDK_DISABLE_DEPRECATED
#define GTK_DISABLE_DEPRECATED
#define GSEAL_ENABLE


#include <gtk/gtk.h>
#include <gdk/gdk.h>

#include "wlib.h"
#include "gtkint.h"
#include "dynarr.h"
#include "i18n.h"

#include "xtrkcad-config.h"

extern char wConfigName[];
static char appLibDir[BUFSIZ];
static char appWorkDir[BUFSIZ];
static char userHomeDir[BUFSIZ];


/*
 *******************************************************************************
 *
 * Get Dir Names
 *
 *******************************************************************************
 */


/** Find the directory where configuration files, help, demos etc are installed. 
 *  The search order is:
 *  1. Directory specified by the XTRKCADLIB environment variable
 *  2. Directory specified by XTRKCAD_INSTALL_PREFIX/share/xtrkcad
 *  3. /usr/lib/xtrkcad
 *  4. /usr/local/lib/xtrkcad
 *  
 *  \return pointer to directory name
 */

const char * wGetAppLibDir( void )
{
	char * cp, *ep;
	char msg[BUFSIZ*2];
	char envvar[80];
	struct stat buf;

	if (appLibDir[0] != '\0') {
		return appLibDir;
	}

	for (cp=wlibGetAppName(),ep=envvar; *cp; cp++,ep++)
		*ep = toupper(*cp);
	strcpy( ep, "LIB" );
	ep = getenv( envvar );
	if (ep != NULL) {
		if ((stat( ep, &buf) == 0 ) && S_ISDIR( buf.st_mode)) {
			strncpy( appLibDir, ep, sizeof appLibDir );
			return appLibDir;
		}
	}

	strcpy(appLibDir, XTRKCAD_INSTALL_PREFIX);
	strcat(appLibDir, "/share/");
	strcat(appLibDir, wlibGetAppName());

	if ((stat( appLibDir, &buf) == 0 ) && S_ISDIR( buf.st_mode)) {
		return appLibDir;
	}

	strcpy( appLibDir, "/usr/lib/" );
	strcat( appLibDir, wlibGetAppName() );
	if ((stat( appLibDir, &buf) == 0 ) && S_ISDIR( buf.st_mode)) {
		return appLibDir;
	}

	strcpy( appLibDir, "/usr/local/lib/" );
	strcat( appLibDir, wlibGetAppName() );
	if ((stat( appLibDir, &buf) == 0 ) && S_ISDIR( buf.st_mode)) {
		return appLibDir;
	}

	sprintf( msg,
		_("The required configuration files could not be located in the expected location.\n\n"
		"Usually this is an installation problem. Make sure that these files are installed in either \n"
		"  %s/share/xtrkcad or\n"
		"  /usr/lib/%s or\n"
		"  /usr/local/lib/%s\n"
		"If this is not possible, the environment variable %s must contain "
		"the name of the correct directory."),
		XTRKCAD_INSTALL_PREFIX, wlibGetAppName(), wlibGetAppName(), envvar );
	wNoticeEx( NT_ERROR, msg, _("Ok"), NULL );
	appLibDir[0] = '\0';
	wExit(0);
	return NULL;
}

/**
 * Get the working directory for the application. This directory is used for storing
 * internal files including rc files. If it doesn't exist, the directory is created
 * silently.
 *
 * \return    pointer to the working directory
 */


const char * wGetAppWorkDir(
		void )
{
	char tmp[BUFSIZ+20];
	char * homeDir;
	DIR *dirp;
	
	if (appWorkDir[0] != '\0')
		return appWorkDir;

	if ((homeDir = getenv( "HOME" )) == NULL) {
		wNoticeEx( NT_ERROR, _("HOME is not set"), _("Exit"), NULL);
		wExit(0);
	}
	sprintf( appWorkDir, "%s/.%s", homeDir, wlibGetAppName() );
	if ( (dirp = opendir(appWorkDir)) != NULL ) {
		closedir(dirp);
	} else {
		if ( mkdir( appWorkDir, 0777 ) == -1 ) {
			sprintf( tmp, _("Cannot create %s"), appWorkDir );
			wNoticeEx( NT_ERROR, tmp, _("Exit"), NULL );
			wExit(0);
		} else {
			/* 
			 * check for default configuration file and copy to 
			 * the workdir if it exists
			 */
			struct stat stFileInfo;
			char appEtcConfig[BUFSIZ];
			sprintf( appEtcConfig, "/etc/%s.rc", wlibGetAppName());
			
			if ( stat( appEtcConfig, &stFileInfo ) == 0 ) {
				char copyConfigCmd[(BUFSIZ * 2) + 3];
				sprintf( copyConfigCmd, "cp %s %s", appEtcConfig, appWorkDir );
				int rc = system( copyConfigCmd );
			}
		}
	}
	return appWorkDir;
}

/**
 * Get the user's home directory. The environment variable HOME is
 * assumed to contain the proper directory.
 *
 * \return    pointer to the user's home directory
 */

const char *wGetUserHomeDir( void )
{
	char *homeDir;
	
	if( userHomeDir[ 0 ] != '\0' )
		return userHomeDir;
		
	if ((homeDir = getenv( "HOME" )) == NULL) {
		wNoticeEx( NT_ERROR, _("HOME is not set"), _("Exit"), NULL);
		wExit(0);
	} else {
		strcpy( userHomeDir, homeDir );
	}	

	return userHomeDir;
}


/*
 *******************************************************************************
 *
 * Preferences
 *
 *******************************************************************************
 */

typedef struct {
		char * section;
		char * name;
		wBool_t present;
		wBool_t dirty;
		char * val;
		} prefs_t;
dynArr_t prefs_da;
#define prefs(N) DYNARR_N(prefs_t,prefs_da,N)
wBool_t prefInitted = FALSE;

/**
 * Read the configuration file into memory
 */

static void readPrefs( void )
{
	char tmp[BUFSIZ], *np, *vp, *cp;
	const char * workDir;
	FILE * prefFile;
	prefs_t * p;

	prefInitted = TRUE;
	workDir = wGetAppWorkDir();
	sprintf( tmp, "%s/%s.rc", workDir, wConfigName );
	prefFile = fopen( tmp, "r" );
	if (prefFile == NULL)
		return;
	while ( ( fgets(tmp, sizeof tmp, prefFile) ) != NULL ) {
		char *sp;
		
		sp = tmp;
		while ( *sp==' ' || *sp=='\t' ) sp++;
		if ( *sp == '\n' || *sp == '#' )
			continue;
		np = strchr( sp, '.' );
		if (np == NULL) {
			wNoticeEx( NT_INFORMATION, tmp, _("Continue"), NULL );
			continue;
		}
		*np++ = '\0';
		while ( *np==' ' || *np=='\t' ) np++;
		vp = strchr( np, ':' );
		if (vp == NULL) {
			wNoticeEx( NT_INFORMATION, tmp, _("Continue"), NULL );
			continue;
		}
		*vp++ = '\0';
		while ( *vp==' ' || *vp=='\t' ) vp++;
		cp = vp + strlen(vp) -1;
		while ( cp >= vp && (*cp=='\n' || *cp==' ' || *cp=='\t') ) cp--;
		cp[1] = '\0';
		DYNARR_APPEND( prefs_t, prefs_da, 10 );
		p = &prefs(prefs_da.cnt-1);
		p->name = strdup(np);
		p->section = strdup(sp);
		p->dirty = FALSE;
		p->val = strdup(vp);
	}
	fclose( prefFile );
}

/**
 * Store a string in the user preferences.
 *
 * \param section IN section in preferences file
 * \param name IN name of parameter
 * \param sval IN value to save
 */

void wPrefSetString(
		const char * section,		/* Section */
		const char * name,		/* Name */
		const char * sval )		/* Value */
{
	prefs_t * p;

	if (!prefInitted)
		readPrefs();
	
	for (p=&prefs(0); p<&prefs(prefs_da.cnt); p++) {
		if ( strcmp( p->section, section ) == 0 && strcmp( p->name, name ) == 0 ) {
			if (p->val)
				free(p->val);
			p->dirty = TRUE;
			p->val = (sval?strdup( sval ):NULL);
			return;
		}
	}
	DYNARR_APPEND( prefs_t, prefs_da, 10 );
	p = &prefs(prefs_da.cnt-1);
	p->name = strdup(name);
	p->section = strdup(section);
	p->dirty = TRUE;
	p->val = (sval?strdup(sval):NULL);
}

/**
 * Get a string from the user preferences.
 *
 * \param section IN section in preferences file
 * \param name IN name of parameter
 */

char * wPrefGetStringBasic(
		const char * section,			/* Section */
		const char * name )			/* Name */
{
	prefs_t * p;

	if (!prefInitted)
		readPrefs();
	
	for (p=&prefs(0); p<&prefs(prefs_da.cnt); p++) {
		if ( strcmp( p->section, section ) == 0 && strcmp( p->name, name ) == 0 ) {
			return p->val;
		}
	}
	return NULL;
}

/**
 * Store an integer value in the user preferences.
 *
 * \param section IN section in preferences file
 * \param name IN name of parameter
 * \param lval IN value to save
 */

 void wPrefSetInteger(
		const char * section,		/* Section */
		const char * name,		/* Name */
		long lval )		/* Value */
{
	char tmp[20];

	sprintf(tmp, "%ld", lval );
	wPrefSetString( section, name, tmp );
}

/**
 * Read an integer value from the user preferences.
 *
 * \param section IN section in preferences file
 * \param name IN name of parameter
 * \param res OUT resulting value
 * \param default IN default value
 * \return TRUE if value differs from default, FALSE if the same
 */

wBool_t wPrefGetIntegerBasic(
		const char * section,		/* Section */
		const char * name,		/* Name */
		long * res,		/* Address of result */
		long def )		/* Default value */
{
	const char * cp;
    char *cp1;

	cp = wPrefGetStringBasic( section, name );
	if (cp == NULL) {
		*res = def;
		return FALSE;
	}
	*res = strtol(cp,&cp1,0);
	if (cp==cp1) {
		*res = def;
		return FALSE;
	}
	return TRUE;
}

/**
 * Save a float value in the preferences file. 
 *
 * \param section IN the file section into which the value should be saved
 * \param name IN the name of the preference
 * \param lval IN the value
 */

 void wPrefSetFloat(
		const char * section,		/* Section */
		const char * name,		/* Name */
		double lval )		/* Value */
{
	char tmp[20];

	sprintf(tmp, "%0.6f", lval );
	wPrefSetString( section, name, tmp );
}

/**
 * Read a float from the preferencesd file.
 *
 * \param section IN the file section from which the value should be read
 * \param name IN the name of the preference
 * \param res OUT pointer for the value
 * \param def IN	default value
 * \return TRUE if value was read, FALSE if default value is used
 */


wBool_t wPrefGetFloatBasic(
		const char * section,		/* Section */
		const char * name,		/* Name */
		double * res,		/* Address of result */
		double def )		/* Default value */
{
	const char * cp;
    char *cp1;

	cp = wPrefGetStringBasic( section, name );
	if (cp == NULL) {
		*res = def;
		return FALSE;
	}
	*res = strtod(cp, &cp1);
	if (cp == cp1) {
		*res = def;
		return FALSE;
	}
	return TRUE;
}

/**
 * Save the configuration to a file. The config parameters are held and updated in an array.
 * To make the settings persistant, this function has to be called. 
 *
 */

void wPrefFlush(
		void )
{
	prefs_t * p;
	char tmp[BUFSIZ];
    const char *workDir;
	FILE * prefFile;

	if (!prefInitted)
		return;
	
	workDir = wGetAppWorkDir();
	sprintf( tmp, "%s/%s.rc", workDir, wConfigName );
	prefFile = fopen( tmp, "w" );
	if (prefFile == NULL)
		return;

	for (p=&prefs(0); p<&prefs(prefs_da.cnt); p++) {
		if(p->val) {
			fprintf( prefFile,  "%s.%s: %s\n", p->section, p->name, p->val );
		}	
	}
	fclose( prefFile );
}

/**
 * Clear the preferences from memory
 * \return  
 */

void wPrefReset(
		void )
{
	prefs_t * p;

	prefInitted = FALSE;
	for (p=&prefs(0); p<&prefs(prefs_da.cnt); p++) {
		if (p->section)
			free( p->section );
		if (p->name)
			free( p->name );
		if (p->val)
			free( p->val );
	}
	prefs_da.cnt = 0;
}