diff options
Diffstat (limited to 'ncurses-5.3/menu/m_item_new.c')
| -rw-r--r-- | ncurses-5.3/menu/m_item_new.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/ncurses-5.3/menu/m_item_new.c b/ncurses-5.3/menu/m_item_new.c new file mode 100644 index 0000000..3117901 --- /dev/null +++ b/ncurses-5.3/menu/m_item_new.c @@ -0,0 +1,232 @@ +/**************************************************************************** + * Copyright (c) 1998,2000 Free Software Foundation, Inc. * + * * + * Permission is hereby granted, free of charge, to any person obtaining a * + * copy of this software and associated documentation files (the * + * "Software"), to deal in the Software without restriction, including * + * without limitation the rights to use, copy, modify, merge, publish, * + * distribute, distribute with modifications, sublicense, and/or sell * + * copies of the Software, and to permit persons to whom the Software is * + * furnished to do so, subject to the following conditions: * + * * + * The above copyright notice and this permission notice shall be included * + * in all copies or substantial portions of the Software. * + * * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * + * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * + * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * + * * + * Except as contained in this notice, the name(s) of the above copyright * + * holders shall not be used in advertising or otherwise to promote the * + * sale, use or other dealings in this Software without prior written * + * authorization. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Juergen Pfeifer, 1995,1997 * + * Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en * + ****************************************************************************/ + +/*************************************************************************** +* Module m_item_new * +* Create and destroy menu items * +* Set and get marker string for menu * +***************************************************************************/ + +#include "menu.priv.h" + +MODULE_ID("$Id$") + +/*--------------------------------------------------------------------------- +| Facility : libnmenu +| Function : bool Is_Printable_String(const char *s) +| +| Description : Checks whether or not the string contains only printable +| characters. +| +| Return Values : TRUE - if string is printable +| FALSE - if string contains non-printable characters ++--------------------------------------------------------------------------*/ +static bool Is_Printable_String(const char *s) +{ + assert(s); + while(*s) + { + if (!isprint((unsigned char)*s)) + return FALSE; + s++; + } + return TRUE; +} + +/*--------------------------------------------------------------------------- +| Facility : libnmenu +| Function : ITEM *new_item(char *name, char *description) +| +| Description : Create a new item with name and description. Return +| a pointer to this new item. +| N.B.: an item must(!) have a name. +| +| Return Values : The item pointer or NULL if creation failed. ++--------------------------------------------------------------------------*/ +NCURSES_EXPORT(ITEM *) +new_item (const char *name, const char *description) +{ + ITEM *item; + + if ( !name || (*name == '\0') || !Is_Printable_String(name) ) + { + item = (ITEM *)0; + SET_ERROR( E_BAD_ARGUMENT ); + } + else + { + item = (ITEM *)calloc(1,sizeof(ITEM)); + if (item) + { + *item = _nc_Default_Item; /* hope we have struct assignment */ + + item->name.length = strlen(name); + item->name.str = name; + + if (description && (*description != '\0') && + Is_Printable_String(description)) + { + item->description.length = strlen(description); + item->description.str = description; + } + else + { + item->description.length = 0; + item->description.str = (char *)0; + } + } + else + SET_ERROR( E_SYSTEM_ERROR ); + } + return(item); +} + +/*--------------------------------------------------------------------------- +| Facility : libnmenu +| Function : int free_item(ITEM *item) +| +| Description : Free the allocated storage for this item. +| N.B.: a connected item can't be freed. +| +| Return Values : E_OK - success +| E_BAD_ARGUMENT - invalid value has been passed +| E_CONNECTED - item is still connected to a menu ++--------------------------------------------------------------------------*/ +NCURSES_EXPORT(int) +free_item (ITEM * item) +{ + if (!item) + RETURN( E_BAD_ARGUMENT ); + + if (item->imenu) + RETURN( E_CONNECTED ); + + free(item); + + RETURN( E_OK ); +} + +/*--------------------------------------------------------------------------- +| Facility : libnmenu +| Function : int set_menu_mark( MENU *menu, const char *mark ) +| +| Description : Set the mark string used to indicate the current +| item (single-valued menu) or the selected items +| (multi-valued menu). +| The mark argument may be NULL, in which case no +| marker is used. +| This might be a little bit tricky, because this may +| affect the geometry of the menu, which we don't allow +| if it is already posted. +| +| Return Values : E_OK - success +| E_BAD_ARGUMENT - an invalid value has been passed +| E_SYSTEM_ERROR - no memory to store mark ++--------------------------------------------------------------------------*/ +NCURSES_EXPORT(int) +set_menu_mark (MENU * menu, const char * mark) +{ + int l; + + if ( mark && (*mark != '\0') && Is_Printable_String(mark) ) + l = strlen(mark); + else + l = 0; + + if ( menu ) + { + char *old_mark = menu->mark; + unsigned short old_status = menu->status; + + if (menu->status & _POSTED) + { + /* If the menu is already posted, the geometry is fixed. Then + we can only accept a mark with exactly the same length */ + if (menu->marklen != l) + RETURN(E_BAD_ARGUMENT); + } + menu->marklen = l; + if (l) + { + menu->mark = (char *)malloc(l+1); + if (menu->mark) + { + strcpy(menu->mark, mark); + if (menu != &_nc_Default_Menu) + menu->status |= _MARK_ALLOCATED; + } + else + { + menu->mark = old_mark; + RETURN(E_SYSTEM_ERROR); + } + } + else + menu->mark = (char *)0; + + if ((old_status & _MARK_ALLOCATED) && old_mark) + free(old_mark); + + if (menu->status & _POSTED) + { + _nc_Draw_Menu( menu ); + _nc_Show_Menu( menu ); + } + else + { + /* Recalculate the geometry */ + _nc_Calculate_Item_Length_and_Width( menu ); + } + } + else + { + return set_menu_mark(&_nc_Default_Menu, mark); + } + RETURN(E_OK); +} + +/*--------------------------------------------------------------------------- +| Facility : libnmenu +| Function : char *menu_mark(const MENU *menu) +| +| Description : Return a pointer to the marker string +| +| Return Values : The marker string pointer or NULL if no marker defined ++--------------------------------------------------------------------------*/ +NCURSES_EXPORT(const char *) +menu_mark (const MENU * menu) +{ + return Normalize_Menu( menu )->mark; +} + +/* m_item_new.c */ |