/**************************************************************************** * Copyright (c) 1998-2002,2003 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 * ****************************************************************************/ #include "form.priv.h" MODULE_ID("$Id: frm_def.c,v 1.13 2003/11/08 20:37:53 tom Exp $") /* this can't be readonly */ static FORM default_form = { 0, /* status */ 0, /* rows */ 0, /* cols */ 0, /* currow */ 0, /* curcol */ 0, /* toprow */ 0, /* begincol */ -1, /* maxfield */ -1, /* maxpage */ -1, /* curpage */ ALL_FORM_OPTS, /* opts */ (WINDOW *)0, /* win */ (WINDOW *)0, /* sub */ (WINDOW *)0, /* w */ (FIELD **)0, /* field */ (FIELD *)0, /* current */ (_PAGE *)0, /* page */ (char *)0, /* usrptr */ NULL, /* forminit */ NULL, /* formterm */ NULL, /* fieldinit */ NULL /* fieldterm */ }; NCURSES_EXPORT_VAR(FORM *) _nc_Default_Form = &default_form; /*--------------------------------------------------------------------------- | Facility : libnform | Function : static FIELD *Insert_Field_By_Position( | FIELD *new_field, | FIELD *head ) | | Description : Insert new_field into sorted fieldlist with head "head" | and return new head of sorted fieldlist. Sorting | criteria is (row,column). This is a circular list. | | Return Values : New head of sorted fieldlist +--------------------------------------------------------------------------*/ static FIELD *Insert_Field_By_Position(FIELD *newfield, FIELD *head) { FIELD *current, *newhead; assert(newfield); if (!head) { /* empty list is trivial */ newhead = newfield->snext = newfield->sprev = newfield; } else { newhead = current = head; while((current->frow < newfield->frow) || ((current->frow==newfield->frow) && (current->fcol < newfield->fcol)) ) { current = current->snext; if (current==head) { /* We cycled through. Reset head to indicate that */ head = (FIELD *)0; break; } } /* we leave the loop with current pointing to the field after newfield*/ newfield->snext = current; newfield->sprev = current->sprev; newfield->snext->sprev = newfield; newfield->sprev->snext = newfield; if (current==head) newhead = newfield; } return(newhead); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : static void Disconnect_Fields(FORM *form) | | Description : Break association between form and array of fields. | | Return Values : - +--------------------------------------------------------------------------*/ static void Disconnect_Fields( FORM * form ) { if (form->field) { FIELD **fields; for(fields=form->field;*fields;fields++) { if (form == (*fields)->form) (*fields)->form = (FORM *)0; } form->rows = form->cols = 0; form->maxfield = form->maxpage = -1; form->field = (FIELD **)0; if (form->page) free(form->page); form->page = (_PAGE *)0; } } /*--------------------------------------------------------------------------- | Facility : libnform | Function : static int Connect_Fields(FORM *form, FIELD **fields) | | Description : Set association between form and array of fields. | | Return Values : E_OK - no error | E_CONNECTED - a field is already connected | E_BAD_ARGUMENT - Invalid form pointer or field array | E_SYSTEM_ERROR - not enough memory +--------------------------------------------------------------------------*/ static int Connect_Fields(FORM * form, FIELD ** fields) { int field_cnt, j; int page_nr; int maximum_row_in_field, maximum_col_in_field; _PAGE *pg; assert(form); form->field = fields; form->maxfield = 0; form->maxpage = 0; if (!fields) RETURN(E_OK); page_nr = 0; /* store formpointer in fields and count pages */ for(field_cnt=0;fields[field_cnt];field_cnt++) { if (fields[field_cnt]->form) RETURN(E_CONNECTED); if ( field_cnt==0 || (fields[field_cnt]->status & _NEWPAGE)) page_nr++; fields[field_cnt]->form = form; } if (field_cnt==0) RETURN(E_BAD_ARGUMENT); /* allocate page structures */ if ( (pg = (_PAGE *)malloc(page_nr * sizeof(_PAGE))) != (_PAGE *)0 ) { form->page = pg; } else RETURN(E_SYSTEM_ERROR); /* Cycle through fields and calculate page boundaries as well as size of the form */ for(j=0;j<field_cnt;j++) { if (j==0) pg->pmin = j; else { if (fields[j]->status & _NEWPAGE) { pg->pmax = j-1; pg++; pg->pmin = j; } } maximum_row_in_field = fields[j]->frow + fields[j]->rows; maximum_col_in_field = fields[j]->fcol + fields[j]->cols; if (form->rows < maximum_row_in_field) form->rows = maximum_row_in_field; if (form->cols < maximum_col_in_field) form->cols = maximum_col_in_field; } pg->pmax = field_cnt-1; form->maxfield = field_cnt; form->maxpage = page_nr; /* Sort fields on form pages */ for(page_nr = 0;page_nr < form->maxpage; page_nr++) { FIELD *fld = (FIELD *)0; for(j = form->page[page_nr].pmin;j <= form->page[page_nr].pmax;j++) { fields[j]->index = j; fields[j]->page = page_nr; fld = Insert_Field_By_Position(fields[j],fld); } form->page[page_nr].smin = fld->index; form->page[page_nr].smax = fld->sprev->index; } RETURN(E_OK); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : static int Associate_Fields(FORM *form, FIELD **fields) | | Description : Set association between form and array of fields. | If there are fields, position to first active field. | | Return Values : E_OK - success | any other - error occurred +--------------------------------------------------------------------------*/ INLINE static int Associate_Fields(FORM *form, FIELD **fields) { int res = Connect_Fields(form,fields); if (res == E_OK) { if (form->maxpage>0) { form->curpage = 0; form_driver(form,FIRST_ACTIVE_MAGIC); } else { form->curpage = -1; form->current = (FIELD *)0; } } return(res); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : FORM *new_form( FIELD **fields ) | | Description : Create new form with given array of fields. | | Return Values : Pointer to form. NULL if error occurred. +--------------------------------------------------------------------------*/ NCURSES_EXPORT(FORM *) new_form (FIELD ** fields) { int err = E_SYSTEM_ERROR; FORM *form = (FORM *)malloc(sizeof(FORM)); if (form) { *form = *_nc_Default_Form; if ((err=Associate_Fields(form,fields))!=E_OK) { free_form(form); form = (FORM *)0; } } if (!form) SET_ERROR(err); return(form); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : int free_form( FORM *form ) | | Description : Release internal memory associated with form. | | Return Values : E_OK - no error | E_BAD_ARGUMENT - invalid form pointer | E_POSTED - form is posted +--------------------------------------------------------------------------*/ NCURSES_EXPORT(int) free_form (FORM * form) { if ( !form ) RETURN(E_BAD_ARGUMENT); if ( form->status & _POSTED) RETURN(E_POSTED); Disconnect_Fields( form ); if (form->page) free(form->page); free(form); RETURN(E_OK); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : int set_form_fields( FORM *form, FIELD **fields ) | | Description : Set a new association of an array of fields to a form | | Return Values : E_OK - no error | E_BAD_ARGUMENT - invalid form pointer | E_POSTED - form is posted +--------------------------------------------------------------------------*/ NCURSES_EXPORT(int) set_form_fields (FORM * form, FIELD ** fields) { FIELD **old; int res; if ( !form ) RETURN(E_BAD_ARGUMENT); if ( form->status & _POSTED ) RETURN(E_POSTED); old = form->field; Disconnect_Fields( form ); if( (res = Associate_Fields( form, fields )) != E_OK ) Connect_Fields( form, old ); RETURN(res); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : FIELD **form_fields( const FORM *form ) | | Description : Retrieve array of fields | | Return Values : Pointer to field array +--------------------------------------------------------------------------*/ NCURSES_EXPORT(FIELD **) form_fields (const FORM * form) { return (Normalize_Form( form )->field); } /*--------------------------------------------------------------------------- | Facility : libnform | Function : int field_count( const FORM *form ) | | Description : Retrieve number of fields | | Return Values : Number of fields, -1 if none are defined +--------------------------------------------------------------------------*/ NCURSES_EXPORT(int) field_count (const FORM * form) { return (Normalize_Form( form )->maxfield); } /* frm_def.c ends here */