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#ifndef lint
static char SccsId[] = "%W% %G%";
#endif
/* Module: editinit.c (Editor Initialization)
* Subroutine: get_edit_struct() returns: EditStruct *
* Subroutine: init_edit_struct() returns: void
* Subroutine: load_edit_string() returns: void
* Subroutine: load_edit_struct() returns: void
* Subroutine: store_edit_struct() returns: void
* Subroutine: recall_edit_struct() returns: void
* Subroutine: clear_edit_buf() returns: void
* Copyright: 1989 Smithsonian Astrophysical Observatory
* You may do anything you like with this file except remove
* this copyright. The Smithsonian Astrophysical Observatory
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
* Modified: {0} Michael VanHilst initial version 4 July 1989
* {1} MVH BSDonly strings.h compatability 19 Feb 1990
* {2} MVH load_edit_string() without save 18 March 1990
* {n} <who> -- <does what> -- <when>
*/
#include <stdio.h>
#ifndef VMS
#ifdef SYSV
#include <string.h> /* strlen, strcat, strcpy, strrchr */
#else
#include <strings.h> /* strlen, etc. for unenlightened BSD's */
#endif
#else
#include <string.h> /* strlen, strcat, strcpy, strrchr */
#endif
#include <X11/Xlib.h>
#include "hfiles/edit.h"
/*
* Subroutine: get_edit_struct
* Returns: Newly allocated popup editor structure
*/
EditStruct *get_edit_struct ( max_char_cnt )
int max_char_cnt;
{
EditStruct *edit;
char *editbuf;
int line_sz, i;
char *calloc_errchk();
/* set line_sz to first int boundary after (maxchar + 1) */
line_sz = ((max_char_cnt + sizeof(int)) / sizeof(int)) * sizeof(int);
editbuf = calloc_errchk(1, (unsigned int)sizeof(EditStruct) +
(line_sz *
(((STACK_SZ + 2) * sizeof(int)) + STACK_SZ + 1)),
(char *)NULL);
if( editbuf == NULL )
return( NULL );
edit = (EditStruct *)editbuf;
editbuf += sizeof(EditStruct);
edit->string = editbuf;
for( i=0; i<STACK_SZ; i++ ) {
editbuf += line_sz;
edit->buf[i].string = editbuf;
}
editbuf += line_sz;
line_sz = line_sz * sizeof(int);
edit->pixlen = (int *)editbuf;
editbuf += line_sz;
edit->charsz = (int *)editbuf;
for( i=0; i<STACK_SZ; i++ ) {
editbuf += line_sz;
edit->buf[i].charsz = (int *)editbuf;
}
edit->max_char_cnt = max_char_cnt;
edit->pixlen[0] = 0;
return( edit );
}
/*
* Subroutine: init_edit_struct
* Purpose: Initialize font and drawing info for popup editor structure
*/
void init_edit_struct ( display, w, edit, fontstruct, foreground, background )
Display *display; /* i: display which has popup window */
Window w; /* i: popup window */
EditStruct *edit; /* i: struct for edit strings */
XFontStruct *fontstruct; /* i: info about the font */
unsigned long foreground; /* i: needed for text GC */
unsigned long background;
{
edit->display = display;
edit->ID = w;
edit->fontstruct = fontstruct;
edit->font = fontstruct->fid;
edit->foreground = foreground;
edit->background = background;
edit->area_height =
fontstruct->max_bounds.ascent + fontstruct->max_bounds.descent;
if( edit->charsz[0] == 0 ) {
edit->string[0] = ' ';
edit->charsz[0] = XTextWidth(fontstruct, edit->string, 1);
edit->pixlen[1] = edit->charsz[0];
}
edit->stack_cnt = 0;
edit->stack_index = -1;
}
/*
* Subroutine: load_edit_string
* Purpose: Store a passed string in the current string buffer
*/
void load_edit_string ( edit, string, char_cnt )
EditStruct *edit;
char *string;
int char_cnt;
{
int i;
if( char_cnt >= edit->max_char_cnt )
char_cnt = edit->max_char_cnt - 1;
(void)strncpy(edit->string, string, char_cnt);
edit->char_cnt = char_cnt;
edit->string[char_cnt] = ' ';
edit->string[char_cnt+1] = '\0';
for( i=0; i<=char_cnt; i++ ) {
edit->charsz[i] = XTextWidth(edit->fontstruct, &(edit->string[i]), 1);
edit->pixlen[i+1] = edit->pixlen[i] + edit->charsz[i];
}
if( edit->pixlen[char_cnt + 1] > edit->max_pixlen )
edit->oversize = 1;
else
edit->oversize = 0;
}
/*
* Subroutine: load_edit_struct
* Purpose: Store a passed string in the editor storage stack
* Note: Also makes it the default entry
* Exception: Assume no other stored strings (erases any)
*/
void load_edit_struct ( edit, string, char_cnt )
EditStruct *edit;
char *string;
int char_cnt;
{
void store_edit_struct(), load_edit_string();
load_edit_string(edit, string, char_cnt);
store_edit_struct(edit);
}
/*
* Subroutine: recall_edit_struct
* Purpose: Retrieve a line from the storage stack
*/
void recall_edit_struct ( edit, next, clear )
EditStruct *edit;
int next;
int clear; /* next <0 clears current string */
{
int i, char_cnt;
void clear_edit_buf();
if( next >= edit->stack_cnt ) {
edit->stack_index = edit->stack_cnt - 1;
return;
} else if( next < 0 ) {
if( clear )
clear_edit_buf (edit);
edit->stack_index = -1;
return;
}
char_cnt = edit->buf[next].char_cnt;
edit->char_cnt = char_cnt;
bcopy(edit->buf[next].string, edit->string, char_cnt + 1);
bcopy((char *)edit->buf[next].charsz, (char *)edit->charsz,
(char_cnt + 1) * sizeof(int));
for( i=0; i<=char_cnt; i++ ) {
edit->pixlen[i+1] = edit->pixlen[i] + edit->charsz[i];
}
if( edit->pixlen[edit->char_cnt + 1] > edit->max_pixlen )
edit->oversize = 1;
else
edit->oversize = 0;
edit->active_position = 0;
edit->stack_index = next;
}
/*
* Subroutine: store_edit_struct
* Purpose: Put current line in the store stack
*/
void store_edit_struct ( edit )
EditStruct *edit;
{
int *charsz, i;
char *string;
if( edit->stack_cnt < STACK_SZ )
(edit->stack_cnt)++;
charsz = edit->buf[edit->stack_cnt-1].charsz;
string = edit->buf[edit->stack_cnt-1].string;
for( i=edit->stack_cnt-1; i>0; i-- ) {
edit->buf[i].char_cnt = edit->buf[i-1].char_cnt;
edit->buf[i].charsz = edit->buf[i-1].charsz;
edit->buf[i].string = edit->buf[i-1].string;
}
edit->buf[0].char_cnt = edit->char_cnt;
edit->buf[0].charsz = charsz;
edit->buf[0].string = string;
bcopy(edit->string, string, edit->char_cnt + 1);
bcopy((char *)edit->charsz, (char *)charsz,
(edit->char_cnt + 1) * sizeof(int));
edit->active_position = edit->char_cnt;
edit->stack_index = -1;
}
/*
* Subroutine: clear_edit_buf
* Purpose: Set edit buffer string to no characters
*/
void clear_edit_buf ( edit )
EditStruct *edit;
{
edit->string[0] = edit->string[edit->char_cnt];
edit->charsz[0] = edit->charsz[edit->char_cnt];
edit->pixlen[1] = edit->charsz[0];
edit->char_cnt = 0;
edit->active_position = 0;
}
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