DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (b66b287a2650)

VCS Links

Line Code
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
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

/*
// <pre>
*/
#ifndef PREFAPI_H
#define PREFAPI_H

#include "nscore.h"
#include "pldhash.h"

NSPR_BEGIN_EXTERN_C

typedef union
{
    char*       stringVal;
    PRInt32     intVal;
    PRBool      boolVal;
} PrefValue;

struct PrefHashEntry : PLDHashEntryHdr
{
    const char *key;
    PrefValue defaultPref;
    PrefValue userPref;
    PRUint8   flags;
};

/*
// <font color=blue>
// The Init function initializes the preference context and creates
// the preference hashtable.
// </font>
*/
nsresult    PREF_Init();

/*
// Cleanup should be called at program exit to free the 
// list of registered callbacks.
*/
void        PREF_Cleanup();
void        PREF_CleanupPrefs();

/*
// <font color=blue>
// Preference flags, including the native type of the preference
// </font>
*/

typedef enum { PREF_INVALID = 0,
               PREF_LOCKED = 1, PREF_USERSET = 2, PREF_CONFIG = 4, PREF_REMOTE = 8,
			   PREF_LILOCAL = 16, PREF_STRING = 32, PREF_INT = 64, PREF_BOOL = 128,
			   PREF_VALUETYPE_MASK = (PREF_STRING | PREF_INT | PREF_BOOL)
			  } PrefType;

/*
// <font color=blue>
// Set the various types of preferences.  These functions take a dotted
// notation of the preference name (e.g. "browser.startup.homepage").  
// Note that this will cause the preference to be saved to the file if
// it is different from the default.  In other words, these are used
// to set the _user_ preferences.
//
// If set_default is set to PR_TRUE however, it sets the default value.
// This will only affect the program behavior if the user does not have a value
// saved over it for the particular preference.  In addition, these will never
// be saved out to disk.
//
// Each set returns PREF_VALUECHANGED if the user value changed
// (triggering a callback), or PREF_NOERROR if the value was unchanged.
// </font>
*/
nsresult PREF_SetCharPref(const char *pref,const char* value, PRBool set_default = PR_FALSE);
nsresult PREF_SetIntPref(const char *pref,PRInt32 value, PRBool set_default = PR_FALSE);
nsresult PREF_SetBoolPref(const char *pref,PRBool value, PRBool set_default = PR_FALSE);

PRBool   PREF_HasUserPref(const char* pref_name);

/*
// <font color=blue>
// Get the various types of preferences.  These functions take a dotted
// notation of the preference name (e.g. "browser.startup.homepage")
//
// They also take a pointer to fill in with the return value and return an
// error value.  At the moment, this is simply an int but it may
// be converted to an enum once the global error strategy is worked out.
//
// They will perform conversion if the type doesn't match what was requested.
// (if it is reasonably possible)
// </font>
*/
nsresult PREF_GetIntPref(const char *pref,
                           PRInt32 * return_int, PRBool get_default);	
nsresult PREF_GetBoolPref(const char *pref, PRBool * return_val, PRBool get_default);	
/*
// <font color=blue>
// These functions are similar to the above "Get" version with the significant
// difference that the preference module will alloc the memory (e.g. XP_STRDUP) and
// the caller will need to be responsible for freeing it...
// </font>
*/
nsresult PREF_CopyCharPref(const char *pref, char ** return_buf, PRBool get_default);
/*
// <font color=blue>
// PRBool function that returns whether or not the preference is locked and therefore
// cannot be changed.
// </font>
*/
PRBool PREF_PrefIsLocked(const char *pref_name);

/*
// <font color=blue>
// Function that sets whether or not the preference is locked and therefore
// cannot be changed.
// </font>
*/
nsresult PREF_LockPref(const char *key, PRBool lockIt);

PrefType PREF_GetPrefType(const char *pref_name);

/*
 * Delete a branch of the tree
 */
nsresult PREF_DeleteBranch(const char *branch_name);

/*
 * Clears the given pref (reverts it to its default value)
 */
nsresult PREF_ClearUserPref(const char *pref_name);

/*
 * Clears all user prefs
 */
nsresult PREF_ClearAllUserPrefs();


/*
// <font color=blue>
// The callback function will get passed the pref_node which triggered the call
// and the void * instance_data which was passed to the register callback function.
// Return a non-zero result (nsresult) to pass an error up to the caller.
// </font>
*/
/* Temporarily conditionally compile PrefChangedFunc typedef.
** During migration from old libpref to nsIPref we need it in
** both header files.  Eventually prefapi.h will become a private
** file.  The two types need to be in sync for now.  Certain
** compilers were having problems with multiple definitions.
*/
#ifndef have_PrefChangedFunc_typedef
typedef nsresult (*PrefChangedFunc) (const char *, void *); 
#define have_PrefChangedFunc_typedef
#endif

/*
// <font color=blue>
// Register a callback.  This takes a node in the preference tree and will
// call the callback function if anything below that node is modified.
// Unregister returns PREF_NOERROR if a callback was found that
// matched all the parameters; otherwise it returns PREF_ERROR.
// </font>
*/
void PREF_RegisterCallback( const char* domain,
								PrefChangedFunc callback, void* instance_data );
nsresult PREF_UnregisterCallback( const char* domain,
								PrefChangedFunc callback, void* instance_data );

/*
 * Used by nsPrefService as the callback function of the 'pref' parser
 */
void PREF_ReaderCallback( void *closure,
                          const char *pref,
                          PrefValue   value,
                          PrefType    type,
                          PRBool      isDefault);

NSPR_END_EXTERN_C
#endif