зеркало из https://github.com/mozilla/pjs.git
214 строки
7.1 KiB
C
214 строки
7.1 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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// <pre>
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*/
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#ifndef PREFAPI_H
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#define PREFAPI_H
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#include "nscore.h"
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#include "pldhash.h"
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NSPR_BEGIN_EXTERN_C
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typedef union
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{
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char* stringVal;
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PRInt32 intVal;
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PRBool boolVal;
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} PrefValue;
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struct PrefHashEntry : PLDHashEntryHdr
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{
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const char *key;
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PrefValue defaultPref;
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PrefValue userPref;
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PRUint8 flags;
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};
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/*
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// <font color=blue>
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// The Init function initializes the preference context and creates
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// the preference hashtable.
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// </font>
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*/
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nsresult PREF_Init();
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/*
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// Cleanup should be called at program exit to free the
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// list of registered callbacks.
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*/
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void PREF_Cleanup();
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void PREF_CleanupPrefs();
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/*
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// <font color=blue>
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// Preference flags, including the native type of the preference
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// </font>
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*/
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typedef enum { PREF_INVALID = 0,
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PREF_LOCKED = 1, PREF_USERSET = 2, PREF_CONFIG = 4, PREF_REMOTE = 8,
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PREF_LILOCAL = 16, PREF_STRING = 32, PREF_INT = 64, PREF_BOOL = 128,
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PREF_VALUETYPE_MASK = (PREF_STRING | PREF_INT | PREF_BOOL)
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} PrefType;
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/*
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// <font color=blue>
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// Set the various types of preferences. These functions take a dotted
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// notation of the preference name (e.g. "browser.startup.homepage").
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// Note that this will cause the preference to be saved to the file if
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// it is different from the default. In other words, these are used
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// to set the _user_ preferences.
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//
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// If set_default is set to PR_TRUE however, it sets the default value.
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// This will only affect the program behavior if the user does not have a value
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// saved over it for the particular preference. In addition, these will never
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// be saved out to disk.
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//
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// Each set returns PREF_VALUECHANGED if the user value changed
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// (triggering a callback), or PREF_NOERROR if the value was unchanged.
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// </font>
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*/
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nsresult PREF_SetCharPref(const char *pref,const char* value, PRBool set_default = PR_FALSE);
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nsresult PREF_SetIntPref(const char *pref,PRInt32 value, PRBool set_default = PR_FALSE);
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nsresult PREF_SetBoolPref(const char *pref,PRBool value, PRBool set_default = PR_FALSE);
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PRBool PREF_HasUserPref(const char* pref_name);
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/*
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// <font color=blue>
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// Get the various types of preferences. These functions take a dotted
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// notation of the preference name (e.g. "browser.startup.homepage")
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//
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// They also take a pointer to fill in with the return value and return an
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// error value. At the moment, this is simply an int but it may
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// be converted to an enum once the global error strategy is worked out.
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//
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// They will perform conversion if the type doesn't match what was requested.
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// (if it is reasonably possible)
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// </font>
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*/
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nsresult PREF_GetIntPref(const char *pref,
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PRInt32 * return_int, PRBool get_default);
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nsresult PREF_GetBoolPref(const char *pref, PRBool * return_val, PRBool get_default);
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/*
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// <font color=blue>
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// These functions are similar to the above "Get" version with the significant
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// difference that the preference module will alloc the memory (e.g. XP_STRDUP) and
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// the caller will need to be responsible for freeing it...
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// </font>
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*/
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nsresult PREF_CopyCharPref(const char *pref, char ** return_buf, PRBool get_default);
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/*
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// <font color=blue>
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// PRBool function that returns whether or not the preference is locked and therefore
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// cannot be changed.
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// </font>
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*/
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PRBool PREF_PrefIsLocked(const char *pref_name);
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/*
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// <font color=blue>
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// Function that sets whether or not the preference is locked and therefore
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// cannot be changed.
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// </font>
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*/
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nsresult PREF_LockPref(const char *key, PRBool lockIt);
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PrefType PREF_GetPrefType(const char *pref_name);
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/*
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* Delete a branch of the tree
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*/
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nsresult PREF_DeleteBranch(const char *branch_name);
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/*
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* Clears the given pref (reverts it to its default value)
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*/
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nsresult PREF_ClearUserPref(const char *pref_name);
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/*
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* Clears all user prefs
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*/
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nsresult PREF_ClearAllUserPrefs();
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/*
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// <font color=blue>
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// The callback function will get passed the pref_node which triggered the call
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// and the void * instance_data which was passed to the register callback function.
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// Return a non-zero result (nsresult) to pass an error up to the caller.
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// </font>
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*/
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/* Temporarily conditionally compile PrefChangedFunc typedef.
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** During migration from old libpref to nsIPref we need it in
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** both header files. Eventually prefapi.h will become a private
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** file. The two types need to be in sync for now. Certain
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** compilers were having problems with multiple definitions.
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*/
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#ifndef have_PrefChangedFunc_typedef
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typedef nsresult (*PrefChangedFunc) (const char *, void *);
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#define have_PrefChangedFunc_typedef
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#endif
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/*
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// <font color=blue>
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// Register a callback. This takes a node in the preference tree and will
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// call the callback function if anything below that node is modified.
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// Unregister returns PREF_NOERROR if a callback was found that
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// matched all the parameters; otherwise it returns PREF_ERROR.
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// </font>
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*/
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void PREF_RegisterCallback( const char* domain,
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PrefChangedFunc callback, void* instance_data );
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nsresult PREF_UnregisterCallback( const char* domain,
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PrefChangedFunc callback, void* instance_data );
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/*
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* Used by nsPrefService as the callback function of the 'pref' parser
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*/
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void PREF_ReaderCallback( void *closure,
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const char *pref,
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PrefValue value,
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PrefType type,
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PRBool isDefault);
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NSPR_END_EXTERN_C
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#endif
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