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deb-goldedplus/goldlib/gall/gwinbase.cpp
2001-03-17 21:17:57 +00:00

2083 lines
51 KiB
C++

// This may look like C code, but it is really -*- C++ -*-
// ------------------------------------------------------------------
// The Goldware Library
// Copyright (C) 1990-1999 Odinn Sorensen
// Copyright (C) 1999-2000 Alexander S. Aganichev
// Copyright (C) 2000 Jacobo Tarrio
// ------------------------------------------------------------------
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this program; if not, write to the Free
// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
// MA 02111-1307, USA
// ------------------------------------------------------------------
// $Id$
// ------------------------------------------------------------------
// Based on CXL by Mike Smedley.
// Windowing kernel.
// ------------------------------------------------------------------
#include <cstdio>
#include <cstdarg>
#include <cstdlib>
#include <cstring>
#include <gmemdbg.h>
#include <gutlmisc.h>
#include <gwinall.h>
#include <gkbdcode.h>
// ------------------------------------------------------------------
// Local optimizations
#define GOLD_INLINE inline
#define GOLD_WCHK
// ------------------------------------------------------------------
static GOLD_INLINE int _wchkrow(int wrow) {
return ((wrow<0) or (wrow>((gwin.active->erow-gwin.active->border)-(gwin.active->srow+gwin.active->border)))) ? true : false;
}
static GOLD_INLINE int _wchkcol(int wcol) {
return ((wcol<0) or (wcol>((gwin.active->ecol-gwin.active->border)-(gwin.active->scol+gwin.active->border)))) ? true : false;
}
static GOLD_INLINE int _wchkcoord(int wrow, int wcol) {
return (_wchkrow(wrow) or _wchkcol(wcol)) ? true : false;
}
// ------------------------------------------------------------------
// Checks validity of given window row coordinate
int wchkrow(int wrow) {
return _wchkrow(wrow);
}
// ------------------------------------------------------------------
// Checks validity of given window column coordinate
int wchkcol(int wcol) {
return _wchkcol(wcol);
}
// ------------------------------------------------------------------
// Checks validity of given window coordinates
int wchkcoord(int wrow, int wcol) {
return _wchkcoord(wrow, wcol);
}
// ------------------------------------------------------------------
// Checks for valid window box coordinates
int wchkbox(int wsrow, int wscol, int werow, int wecol) {
return (_wchkcoord(wsrow,wscol) or _wchkcoord(werow,wecol) or (wsrow>werow) or (wscol>wecol)) ? true : false;
}
// ------------------------------------------------------------------
// Sets window cursor coordinates
int wgotoxy(int wrow, int wcol) {
// check for valid cursor coordinates
#ifdef GOLD_WCHK
if(wchkcoord(wrow,wcol))
return gwin.werrno=W_INVCOORD;
#endif
// calculate effective cursor coordinates and update window record
const int &row = gwin.active->row = gwin.active->srow + wrow + gwin.active->border;
const int &col = gwin.active->column = gwin.active->scol + wcol + gwin.active->border;
// set cursor location
vposset(row,col);
// return with no error
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Opens a window and makes it active
int wopen(int srow, int scol, int erow, int ecol, int btype, int battr, int wattr, int sbattr, int loattr) {
// check for valid box type
if(btype<0 or btype>7) {
gwin.werrno=W_INVBTYPE;
return 0;
}
// see if window is to have a border
int border = (btype==5) ? NO : YES;
// check for valid coordinates
if(srow>(erow-border) or scol>(ecol-border)) {
gwin.werrno=W_INVCOORD;
return 0;
}
// allocate memory for new record
_wrec_t* wrec = (_wrec_t*)throw_xmalloc(sizeof(_wrec_t));
if(wrec==NULL) {
gwin.werrno=W_ALLOCERR;
return 0;
}
// save affected area of screen
vsavebuf* wbuf = vsave(srow,scol,erow,ecol);
if(wbuf==NULL) {
throw_xrelease(wrec);
gwin.werrno=W_ALLOCERR;
return 0;
}
// add new record to linked list
if(gwin.active!=NULL)
gwin.active->next=wrec;
wrec->prev=gwin.active;
wrec->next=NULL;
gwin.active=wrec;
// draw and fill text box on screen
switch(gwin.style) {
case STYLE_NORMAL:
if(border)
vbox(srow,scol,erow,ecol,btype,battr,loattr);
vfill(srow+border,scol+border,erow-border,ecol-border,gwin.fillch,wattr);
break;
}
// increment window handle counter
gwin.handle++;
// save window info in window record
gwin.active->wbuf = wbuf;
gwin.active->whandle = gwin.handle;
gwin.active->srow = srow;
gwin.active->scol = scol;
gwin.active->erow = erow;
gwin.active->ecol = ecol;
gwin.active->btype = btype;
gwin.active->wattr = wattr;
gwin.active->battr = battr;
gwin.active->loattr = loattr;
gwin.active->sbattr = sbattr;
gwin.active->border = border;
gwin.active->row = srow+border;
gwin.active->column = scol+border;
gwin.active->attr = wattr;
gwin.active->title = NULL;
gwin.active->tpos = 0;
gwin.active->help = 0;
gwin.active->form = NULL;
gwin.active->wsbuf = NULL;
// increment total number of open windows
gwin.total++;
// initialize cursor location to window row 0 column 0
wgotoxy(0,0);
// return normally
gwin.werrno=W_NOERROR;
return gwin.handle;
}
// ------------------------------------------------------------------
// Closes a window
int wclose() {
// check for active window
if(!gwin.total or !gwin.active)
return(gwin.werrno=W_NOACTIVE);
// if window has a shadow, close shadow first
if(gwin.active->wsbuf!=NULL)
wshadoff();
// restore contents of and free memory held by window
vrestore(gwin.active->wbuf);
throw_xrelease(gwin.active->wbuf);
// decrement total number of open windows
gwin.total--;
// free memory held by window's record and update linked list
_wrec_t *wrec = gwin.active->prev;
throw_xrelease(gwin.active);
gwin.active=wrec;
if(gwin.active!=NULL)
gwin.active->next=NULL;
// update cursor location and help category
if(gwin.active!=NULL) {
vposset(gwin.active->row,gwin.active->column);
if(gwin.active->help)
gwin.help=gwin.active->help;
}
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Closes all open windows
int wcloseall() {
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
while(gwin.total)
if(wclose())
return gwin.werrno;
// close hidden windows too
_wrec_t* prev;
while(gwin.hidden!=NULL) {
prev = gwin.hidden->prev;
throw_xfree(gwin.hidden->wbuf);
throw_xfree(gwin.hidden);
gwin.hidden = prev;
}
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Gives active window a shadow
int wshadow(int attr) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// see if window already has a shadow
if(gwin.active->wsbuf!=NULL)
return gwin.werrno=W_NOERROR;
// get window coordinates from the window's record
const int &srow = gwin.active->srow;
const int &scol = gwin.active->scol;
const int &erow = gwin.active->erow;
const int &ecol = gwin.active->ecol;
// allocate buffer to hold shadow's contents
vatch* wsbuf = (vatch*)throw_xmalloc((((erow-srow)*sizeof(vatch))+ecol-scol+1)*sizeof(vatch));
if(wsbuf == NULL)
return gwin.werrno=W_ALLOCERR;
// start at upper right corner of shadow and work down
int crow = srow+1;
int ccol = ecol+1;
vatch* q = wsbuf;
// draw shadow to right of window
while(crow<=erow) {
// read current screen characters/attributes and save in shadow's buffer
vatch tmp[2];
*q = vgetw(crow, ccol);
#if defined(__USE_NCURSES__) || !defined(__UNIX__)
tmp[0] = vsattr(*q, attr);
#else
tmp[0] = vsattr(' ', attr);
#endif
q++;
*q = vgetw(crow, ccol + 1);
#if defined(__USE_NCURSES__) || !defined(__UNIX__)
tmp[1] = vsattr(*q, attr);
#else
tmp[1] = vsattr(' ', attr);
#endif
q++;
// write characters back to screen using shadow's attribute
vputws(crow++, ccol, tmp, 2);
}
// start at lower left corner of shadow and work right
crow = erow+1;
ccol = scol+2;
int stop = ecol+2;
int len = stop - ccol + 1;
vatch* wptr = (vatch*)gvid->bufwrd;
// draw bottom shadow
while(ccol<=stop) {
// read attribs/chars and store in buffers
*q = vgetw(crow, ccol++);
#if defined(__USE_NCURSES__) || !defined(__UNIX__)
*wptr++ = vsattr(*q, attr);
#else
*wptr++ = vsattr(' ', attr);
#endif
q++;
}
// display complete buffer
vputws(crow, scol+2, gvid->bufwrd, len);
// save info in window's record
gwin.active->wsbuf = wsbuf;
gwin.active->wsattr = attr;
// reset cursor
vposset(gwin.active->row,gwin.active->column);
// return with no error
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Removes shadow from active window
int wshadoff() {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// if window doesn't have a shadow, ignore request
if(gwin.active->wsbuf==NULL)
return gwin.werrno=W_NOERROR;
// get window coordinates from the window's record
const int &srow = gwin.active->srow;
const int &scol = gwin.active->scol;
const int &erow = gwin.active->erow;
const int &ecol = gwin.active->ecol;
// start at upper right corner of shadow and work down
int crow = srow+1;
int ccol = ecol+1;
vatch* q = gwin.active->wsbuf;
// delete shadow to right of window
while(crow<=erow) {
vputw(crow, ccol, *q++);
vputw(crow++, ccol+1, *q++);
}
// start at lower left corner of shadow and work right
crow = erow+1;
ccol = scol+2;
int stop = ecol+2;
// delete bottom shadow
while(ccol<=stop)
vputw(crow,ccol++,*q++);
// free memory held by shadow
throw_xrelease(gwin.active->wsbuf);
// update window's record
gwin.active->wsattr = 0xFF;
// return with no error
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Scrolls the active window up or down
int wscroll(int count, int direction) {
// check for window border
const int &border = gwin.active->border;
vscroll(
gwin.active->srow + border,
gwin.active->scol + border,
gwin.active->erow - border,
gwin.active->ecol - ((border or (gwin.active->sbattr != -1)) ? 1 : 0),
gwin.active->wattr,
direction == SUP ? count : -count
);
// return with no error
return gwin.werrno = W_NOERROR;
}
// ------------------------------------------------------------------
// Scrolls a region of the active window up or down
int wscrollbox(int wsrow, int wscol, int werow, int wecol, int count, int direction) {
// check for window border
const int &border = gwin.active->border;
vscroll(
gwin.active->srow+wsrow+border,
gwin.active->scol+wscol+border,
gwin.active->srow+werow+border,
gwin.active->scol+wecol+border,
gwin.active->wattr,
direction == SUP ? count : -count
);
// return with no error
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Displays a character inside active window
int wputc(char ch) {
int cwcol;
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// get coordinates from window's record
int crow = gwin.active->row;
int ccol = gwin.active->column;
const int &scol = gwin.active->scol;
const int &border = gwin.active->border;
// test the input character for control characters
switch(ch) {
case '\n':
crow++;
case '\r':
ccol=scol+border;
break;
case '\b':
if(ccol==(scol+border)) {
ccol=gwin.active->ecol-border;
crow--;
if(crow<(gwin.active->srow+border))
crow++;
}
else {
ccol--;
}
break;
case '\t':
cwcol=ccol-border-scol;
ccol+=(tabstop(cwcol,gwin.tabwidth)-cwcol);
break;
default:
vputc(crow, ccol++, gwin.active->attr, ch);
}
// see if wrap-around is needed
if(ccol > (gwin.active->ecol-border)) {
ccol = scol+border;
crow++;
}
// see if scroll is needed
if(crow > (gwin.active->erow-border)) {
wscroll(1,SUP);
crow--;
}
// update window's record
gwin.active->row=crow;
gwin.active->column=ccol;
// reset cursor position
vposset(crow,ccol);
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Reads current cursor location inside window
int wreadcur(int* wrow, int* wcol) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// read effective cursor coordinates
int row,col;
vposget(&row,&col);
// calculate window cursor coordinates
const int &border = gwin.active->border;
*wrow = row - gwin.active->srow - border;
*wcol = col - gwin.active->scol - border;
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Display a character specified number of times
int wdupc(char ch, int count) {
// check for active window
if(!gwin.total)
return(gwin.werrno=W_NOACTIVE);
// display ch for count times
while(count--)
wputc(ch);
// return with gwin.werrno set by wputc()
return(gwin.werrno);
}
// ------------------------------------------------------------------
// Clears the active window in specified attribute
int wcclear(int attr) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// check for window border
const int &border = gwin.active->border;
vfill(
gwin.active->srow+border,
gwin.active->scol+border,
gwin.active->erow-border,
gwin.active->ecol-border,
gwin.fillch,
attr
);
// home the cursor
wgotoxy(0,0);
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Clears from cursor postion to end of window's line
int wclreol() {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// clear to end of window's line
const int &column = gwin.active->column;
vputx(
gwin.active->row,
column,
gwin.active->attr,
gwin.fillch,
gwin.active->ecol - gwin.active->border - column + 1
);
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Clears from cursor postion to end of window
int wclreos() {
int wrow, werow, wr, wc;
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// save current window row and column
wreadcur(&wr, &wc);
wrow = wr;
werow = gwin.active->erow - gwin.active->srow - gwin.active->border;
wclreol();
wrow++;
while(wrow <= werow) {
wgotoxy(wrow,0);
wclreol();
wrow++;
}
// restore window row and column
wgotoxy(wr,wc);
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// This function will process an Escape sequence when encountered
static const char* process_esc(const char* str) {
int wrow,wcol;
const char *p = str;
for(; *p==ESC; p++) {
int attr = gwin.active->attr;
switch(*(++p)) {
case '+': // increase text attribute
wtextattr(++attr);
break;
case '-': // decrease text attribute
wtextattr(--attr);
break;
case 'A': // change attribute
wtextattr(*++p);
break;
case 'F': // change foreground attribute
wtextattr((int)((*++p & 0x07) | (attr & ~0x07)));
break;
case 'B': // change background attribute
wtextattr((int)((*++p & 0x70) | (attr & ~0x70)));
break;
case 'I': // toggle intensity bit
wtextattr((int)(attr ^ INTENSE));
break;
case 'L': // toggle blinking bit
wtextattr((int)(attr ^ BLINK));
break;
case 'X': // reverse attribute
wtextattr(revsattr(attr));
break;
case 'R': // set cursor row
wreadcur(&wrow,&wcol);
wgotoxy(*++p,wcol);
break;
case 'C': // set cursor column
wreadcur(&wrow,&wcol);
wgotoxy(wrow,*++p);
break;
case 'E': // erase
switch(*++p) {
case 'W': // erase window
wclear();
break;
case 'S': // erase to end of window
wclreos();
break;
case 'L': // erase to end of window's line
wclreol();
break;
}
break;
case 'D': // duplicate character
{
char ch = *++p;
wdupc(ch,*++p);
}
break;
default:
p--;
}
}
return --p;
}
// ------------------------------------------------------------------
// Displays a string inside active window
int wputs(const char* str) {
int cwcol;
const char* q;
// get effective coordinates from window's record
int &crow = gwin.active->row;
int &ccol = gwin.active->column;
const int &scol = gwin.active->scol;
const int &border = gwin.active->border;
// do while not end of string
for(q=str; *q; q++) {
// test the input character for control characters
switch(*q) {
case '\n':
crow++;
case '\r':
ccol=scol+border;
break;
case '\b':
if(ccol==(scol+border)) {
ccol=gwin.active->ecol-border;
crow--;
if(crow<(gwin.active->srow+border))
crow++;
}
else {
ccol--;
}
break;
case '\t':
cwcol=ccol-border-scol;
ccol+=(tabstop(cwcol,gwin.tabwidth)-cwcol);
break;
case ESC:
q=process_esc(q);
break;
default:
vputc(crow, ccol++, gwin.active->attr, *q);
}
// see if wrap-around is needed
if(ccol > (gwin.active->ecol-border)) {
ccol=scol+border;
crow++;
}
// see if scroll is needed
if(crow > (gwin.active->erow-border)) {
wscroll(1,SUP);
crow--;
}
}
// reset cursor position
vposset(crow,ccol);
// return normally
return(gwin.werrno=W_NOERROR);
}
// ------------------------------------------------------------------
// Displays a character inside active window
int wprintc(int wrow, int wcol, int atr, vchar chr) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// check for valid coordinates
#ifdef GOLD_WCHK
if(wchkcoord(wrow,wcol))
return gwin.werrno=W_INVCOORD;
#endif
vputc(wrow+gwin.active->srow+gwin.active->border, wcol+gwin.active->scol+gwin.active->border, atr, chr);
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Outputs a formatted string to active window
int wprintf(const char* format, ...) {
va_list argptr;
char buf[255];
// format string using specified parameters into buffer
va_start(argptr,format); // access argument list
int result = vsprintf(buf,format,argptr); // create string using argument list
va_end(argptr); // end access of argument list
// display the created string
wputs(buf);
return result;
}
// ------------------------------------------------------------------
// Print a formatted string at a specific position and attribute
int wprintfs(int wrow, int wcol, int attr, const char* format, ...) {
va_list argptr;
char buf[256];
*buf = NUL;
va_start(argptr, format);
int result = vsprintf(buf, format, argptr);
va_end(argptr);
wprints(wrow, wcol, attr, buf);
return result;
}
// ------------------------------------------------------------------
// Displays a string inside active window
int wprints(int wrow, int wcol, int attr, const char* str) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// check for valid coordinates
#ifdef GOLD_WCHK
if(wchkcoord(wrow,wcol))
return gwin.werrno=W_INVCOORD;
#endif
const int &border = gwin.active->border;
vputs(gwin.active->srow+wrow+border,gwin.active->scol+wcol+border,attr,str);
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Displays a string inside active window
int wprintvs(int wrow, int wcol, int attr, const vchar* str) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// check for valid coordinates
#ifdef GOLD_WCHK
if(wchkcoord(wrow,wcol))
return gwin.werrno=W_INVCOORD;
#endif
const int &border = gwin.active->border;
vputvs(gwin.active->srow+wrow+border,gwin.active->scol+wcol+border,attr,str);
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
int wputx(int wrow, int wcol, int attr, vchar chr, uint len) {
const int &border = gwin.active->border;
vputx(gwin.active->srow+wrow+border,gwin.active->scol+wcol+border,attr,chr,len);
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
int wputy(int wrow, int wcol, int attr, vchar chr, uint len) {
const int &border = gwin.active->border;
vputy(gwin.active->srow+wrow+border,gwin.active->scol+wcol+border,attr,chr,len);
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Displays a string inside active window
int wprintns(int wrow, int wcol, int attr, const char* str, uint len, vchar fill, int fill_attr) {
char* istr = throw_xstrdup(str);
char* ostr = istr;
char och = *ostr;
uint olen = strlen(istr);
if(len < olen) {
ostr += len;
och = *ostr;
*ostr = NUL;
}
int retval = wprints(wrow, wcol, attr, istr);
if(len < olen)
*ostr = och;
else if(len > olen)
retval = wputx(wrow, wcol+olen, (fill_attr != -1) ? fill_attr : attr, fill, len-olen);
throw_xfree(istr);
return retval;
}
// ------------------------------------------------------------------
// Displays attrib/char buffer inside active window
int wprintws(int wrow, int wcol, vatch* buf, uint len) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// check for valid coordinates
#ifdef GOLD_WCHK
if(wchkcoord(wrow,wcol))
return gwin.werrno=W_INVCOORD;
#endif
// see if window has border
const int &border = gwin.active->border;
// calculate effective coordinates
int row = gwin.active->srow+wrow+border;
int col = gwin.active->scol+wcol+border;
// display buffer
vputws(row, col, buf, len);
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Returns address of record of given window handle
_wrec_t* wfindrec(int whandle) {
_wrec_t *wrec;
// scan through linked list for record belonging to requested handle
wrec = gwin.active;
while(wrec) {
if(whandle==wrec->whandle)
break;
wrec=wrec->prev;
}
if(wrec == NULL) {
// Search through the hidden windows
wrec = gwin.hidden;
while(wrec) {
if(whandle==wrec->whandle)
break;
wrec=wrec->prev;
}
}
// return address of found record
return wrec;
}
// ------------------------------------------------------------------
// Hides active window
int whide() {
vsavebuf* p;
int shattr;
_wrec_t *temp;
// check for active window
if(!gwin.total)
return(gwin.werrno=W_NOACTIVE);
// save active window
p = vsave(gwin.active->srow,gwin.active->scol,gwin.active->erow,gwin.active->ecol);
// check for/close window's shadow
if(gwin.active->wsbuf!=NULL) {
shattr = gwin.active->wsattr;
wshadoff();
gwin.active->wsattr = shattr;
}
else {
gwin.active->wsattr = -1;
}
// restore contents of active window's buffer
vrestore(gwin.active->wbuf);
throw_xfree(gwin.active->wbuf);
gwin.active->wbuf = p;
// update visible window record linked list
temp = gwin.active;
gwin.active = gwin.active->prev;
if(gwin.active)
gwin.active->next = NULL;
gwin.total--;
// update hidden window record linked list
if(gwin.hidden)
gwin.hidden->next = temp;
temp->prev = gwin.hidden;
temp->next = NULL;
gwin.hidden = temp;
// update cursor location and help category
if(gwin.active) {
vposset(gwin.active->row,gwin.active->column);
if(gwin.active->help)
gwin.help = gwin.active->help;
}
// return normally
return(gwin.werrno=W_NOERROR);
}
// ------------------------------------------------------------------
// Unhides a previously hidden window
int wunhide(int whandle) {
vsavebuf* p;
_wrec_t* found;
// check pointer to hidden window linked list ; must not be NULL
if(gwin.hidden==NULL)
return gwin.werrno=W_NOHIDDEN;
// check to see if input window handle == 0. if so, then
// that means to unhide the most recently hidden window.
if(!whandle)
whandle=gwin.hidden->whandle;
// scan through linked list for record belonging to requested handle
found=gwin.hidden;
while(found!=NULL) {
if(whandle==found->whandle)
break;
found=found->prev;
}
// was handle found in hidden window record linked list?
if(found==NULL) {
// see if handle is in visible window record linked list
if(wfindrec(whandle)==NULL)
return gwin.werrno=W_NOTFOUND;
else
return gwin.werrno=W_NOTHIDD;
}
// save area of screen where window is to unhide at
if((p=vsave(found->srow,found->scol,found->erow,found->ecol))==NULL)
return gwin.werrno=W_ALLOCERR;
// restore contents of hidden window back to screen
vrestore(found->wbuf);
throw_xfree(found->wbuf);
found->wbuf=p;
// update hidden window record linked list
if(found->prev!=NULL)
found->prev->next=found->next;
if(found->next==NULL)
gwin.hidden=found->prev;
else
found->next->prev=found->prev;
// update visible window record linked list
if(gwin.active!=NULL)
gwin.active->next=found;
found->prev=gwin.active;
found->next=NULL;
gwin.active=found;
gwin.total++;
// if window had a shadow before hiding, give it one again
if(gwin.active->wsattr!=-1)
wshadow(gwin.active->wsattr);
// update help category
if(gwin.active->help)
gwin.help=gwin.active->help;
// reset cursor
vposset(gwin.active->row,gwin.active->column);
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Unlinks and frees a window from memory, but does not manipulate
// the screen at all
int wunlink(int w) {
_wrec_t *found, *prev, *next;
// check to see if input window handle == 0. if
// so, then that means to unlink the active window.
if(!w)
w=gwin.active->whandle;
// find address of window record for given window handle
if((found=wfindrec(w))==NULL)
return gwin.werrno=W_NOTFOUND;
// free memory held by shadow's buffer (if shadow exists)
if(found->wsbuf!=NULL)
throw_xrelease(found->wsbuf);
// free memory held by window's buffer
throw_xrelease(found->wbuf);
// decrement total number of open windows
gwin.total--;
// re-link list pointers around window record to remove
prev=found->prev;
next=found->next;
if(prev!=NULL)
prev->next=next;
if(next!=NULL)
next->prev=prev;
// free memory held by window record
throw_xfree(found);
// see if active window has changed
if(next==NULL) {
if(prev!=NULL) {
gwin.active=prev;
if(gwin.active->help)
gwin.help=gwin.active->help;
}
}
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Local variables
static _wrec_t *__curr, *__found;
static int __crow, __ccol;
static int __gattr;
static const char* __p;
// ------------------------------------------------------------------
// This function dectects if given window is blocking the current
// window or its shadow at specified coordinates
static GOLD_INLINE int window_blocking() {
return (__crow>=__curr->srow and __crow<=__curr->erow and __ccol>=__curr->scol and __ccol<=__curr->ecol) ? YES : NO;
}
// ------------------------------------------------------------------
// This function detects if a given window's bottom shadow is
// blocking the current window or its shadow at specified coordinates
static GOLD_INLINE int bshadow_blocking() {
if(__crow==(__curr->erow+1))
if((__ccol>=(__curr->scol+2)) and (__ccol<=(__curr->ecol+2)))
return YES;
else
return NO;
return NO;
}
// ------------------------------------------------------------------
// This function detects if a given window's right shadow is blocking
// the current window or its shadow at specified coordinates
static GOLD_INLINE int rshadow_blocking() {
if(__ccol==(__curr->ecol+1) or __ccol==(__curr->ecol+2))
if((__crow>=(__curr->srow+1)) and (__crow<=__curr->erow))
return YES;
else
return NO;
return NO;
}
// ------------------------------------------------------------------
static GOLD_INLINE vatch* calc_window(_wrec_t *wrec) {
return wrec->wbuf->data+((__crow-wrec->srow)*(wrec->ecol-wrec->scol+1))+(__ccol-wrec->scol);
}
// ------------------------------------------------------------------
static GOLD_INLINE vatch* calc_bshadow(_wrec_t *wrec) {
return wrec->wsbuf+((((__crow-wrec->srow-1)*2)+(__ccol-wrec->scol-2)));
}
// ------------------------------------------------------------------
static GOLD_INLINE vatch* calc_rshadow(_wrec_t *wrec) {
return wrec->wsbuf+((((__crow-wrec->srow-1)*2)+(__ccol-wrec->ecol-1)));
}
// ------------------------------------------------------------------
// This function will exchange the contents of the applicable buffers
static void swap_contents(vatch* pfound, vatch* pcurr, int shadow) {
register _wrec_t *wptr;
register vatch temp, chat;
// display character from current position in window to
// activate on the screen. if character is part of a
// shadow, reflect the character on the screen.
temp = vgetw(__crow, __ccol);
if(shadow&2)
*pcurr = vschar(*pcurr, vgchar(temp));
chat = ((vgattr(temp) & BLINK) and shadow) ? vsattr(*pcurr, vgattr(*pcurr) | BLINK) : *pcurr;
vputw(__crow, __ccol, chat);
// let window position directly above position
// to activate have the character that it holds
*pcurr = *pfound;
// if current character position to activate will
// activate over a shadow in another window
if(shadow&1) {
// resolve all shadows upwards
wptr = __curr;
chat = vsattr(*pfound, __curr->wsattr);
for(__curr=__curr->next;__curr!=NULL;__curr=__curr->next) {
if(window_blocking()) {
*(calc_window(__curr)) = chat;
chat = temp;
break;
}
else {
if(bshadow_blocking())
*(calc_bshadow(__curr)) = chat;
else {
if(rshadow_blocking())
*(calc_rshadow(__curr)) = chat;
}
}
}
temp = chat;
__curr = wptr;
}
// let character position activated hold character
// that was on the screen in the same position
*pfound = temp;
}
// ------------------------------------------------------------------
int wactiv(int whandle) {
register int startcol, stopcol;
_wrec_t *prev, *next;
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// if window is already active, ignore request
if(whandle==gwin.active->whandle)
return gwin.werrno=W_NOERROR;
// find address of window's record
__found=wfindrec(whandle);
if(__found==NULL)
return gwin.werrno=W_NOTFOUND;
// check every character position in window to activate
for(__crow=__found->srow;__crow<=__found->erow;__crow++) {
for(__ccol=__found->scol;__ccol<=__found->ecol;__ccol++) {
// check all window records "above" window to activate
for(__curr=__found->next;__curr!=NULL;__curr=__curr->next) {
// see if current position in window to activate
// is blocked by same position in test window
if(window_blocking()) {
// calculate buffer addresses and swap contents
swap_contents(calc_window(__found),calc_window(__curr),0);
break;
}
// see if test window has a shadow
if(__curr->wsbuf!=NULL) {
// see if shadow to the right of test window is
// blocking the current position of window to activate
if(rshadow_blocking()) {
swap_contents(calc_window(__found),calc_rshadow(__curr),1);
break;
}
// see if shadow to the bottom of test window is
// blocking the current position of window to activate
if(bshadow_blocking()) {
swap_contents(calc_window(__found),calc_bshadow(__curr),1);
break;
}
}
}
}
}
// if window to activate has a shadow, then check
// every character position in the shadow to see
// if it is blocked by another window or window shadow
if(__found->wsbuf!=NULL) {
// search the right shadow of window to activiate
startcol=__found->ecol+1;
stopcol=startcol+1;
for(__crow=__found->srow+1;__crow<=__found->erow;__crow++) {
for(__ccol=startcol;__ccol<=stopcol;__ccol++) {
// check all window records "above" shadow to activate
for(__curr=__found->next;__curr!=NULL;__curr=__curr->next) {
// see if current position in shadow to activate
// is blocked by same position in current window
if(window_blocking()) {
// calculate buffer addresses and swap contents
swap_contents(calc_rshadow(__found),calc_window(__curr),2);
break;
}
// see if test window has a shadow
if(__curr->wsbuf!=NULL) {
// see if current position of window to activate is
// blocked by the right shadow of the test window
if(rshadow_blocking()) {
swap_contents(calc_rshadow(__found),calc_rshadow(__curr),3);
break;
}
// see if current position of window to activate is
// blocked by the bottom shadow of the test window
if(bshadow_blocking()) {
swap_contents(calc_rshadow(__found),calc_bshadow(__curr),3);
break;
}
}
}
}
}
// search bottom shadow
startcol=__found->scol+2;
stopcol=__found->ecol+2;
__crow=__found->erow+1;
for(__ccol=startcol;__ccol<=stopcol;__ccol++) {
// check all window records "above" shadow to activate
for(__curr=__found->next;__curr!=NULL;__curr=__curr->next) {
// see if current position in shadow to activate
// is blocked by same position in test window
if(window_blocking()) {
// calculate buffer addresses and swap contents
swap_contents(calc_bshadow(__found),calc_window(__curr),2);
break;
}
// see if test window has a shadow
if(__curr->wsbuf!=NULL) {
if(rshadow_blocking()) {
swap_contents(calc_bshadow(__found),calc_rshadow(__curr),3);
break;
}
if(bshadow_blocking()) {
swap_contents(calc_bshadow(__found),calc_bshadow(__curr),3);
break;
}
}
}
}
}
// re-link pointer to window record to be activated
prev=__found->prev;
next=__found->next;
if(prev!=NULL)
prev->next=next;
next->prev=prev;
gwin.active->next=__found;
__found->prev=gwin.active;
__found->next=NULL;
gwin.active=__found;
// update help category
if(gwin.active->help)
gwin.help=gwin.active->help;
// reset cursor position
vposset(gwin.active->row,gwin.active->column);
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Activates a window without overlap checking
int wactiv_(int whandle) {
// if window is already active, ignore request
if(gwin.active and (whandle == gwin.active->whandle))
return gwin.werrno = W_NOERROR;
// find address of window's record
__found = wfindrec(whandle);
if(__found == NULL)
return gwin.werrno = W_NOTFOUND;
// re-link pointer to window record to be activated
_wrec_t* prev = __found->prev;
_wrec_t* next = __found->next;
if(prev)
prev->next = next;
next->prev = prev;
gwin.active->next = __found;
__found->prev = gwin.active;
__found->next = NULL;
gwin.active = __found;
// update help category
if(gwin.active->help)
gwin.help = gwin.active->help;
// reset cursor position
vposset(gwin.active->row,gwin.active->column);
// return normally
return gwin.werrno = W_NOERROR;
}
// ------------------------------------------------------------------
// this function will update buffers above window string will be displayed in
static void update_buffers(vatch* pcurr, int shadow) {
_wrec_t* tcurr;
int tgattr;
// put current string character and attribute into found window's buffer
*pcurr = vcatch(*__p, __gattr);
// if window's shadow is what's blocking, check to see
// if it is the highest shadow. If it is, display the
// character in the shadow's attribute, otherwise search
// for other blocking windows
if(shadow) {
if(__curr->next==NULL) {
vputc(__crow, __ccol, __gattr & BLINK ? (__curr->wsattr | BLINK) : __curr->wsattr, *__p);
}
else {
tcurr = __curr;
__curr = __curr->next;
tgattr = __gattr;
__gattr = __curr->wsattr;
if(window_blocking())
update_buffers(calc_window(__curr), 0);
else {
if(bshadow_blocking())
update_buffers(calc_bshadow(__curr), 1);
else {
if(rshadow_blocking())
update_buffers(calc_rshadow(__curr), 1);
}
}
__gattr = tgattr;
__curr = tcurr;
}
}
}
// ------------------------------------------------------------------
int wwprintc(int whandle, int wrow, int wcol, int attr, const vchar chr) {
// check for existance of active window or hidden windows
if(!gwin.total and gwin.hidden==NULL)
return gwin.werrno=W_NOACTIVE;
// find address of window's record
_wrec_t* found = wfindrec(whandle);
if(found==NULL) {
found = gwin.hidden;
while(found) {
if(whandle==found->whandle)
break;
found = found->prev;
}
if(found==NULL)
return gwin.werrno=W_NOTFOUND;
}
// display character
vputc(found->srow+wrow+found->border, found->scol+wcol+found->border, attr, chr);
// return to caller
return gwin.werrno = W_NOERROR;
}
// ------------------------------------------------------------------
int wwprints(int whandle, int wrow, int wcol, int attr, const char* str) {
// check for existance of active window or hidden windows
if(!gwin.total and gwin.hidden==NULL)
return gwin.werrno=W_NOACTIVE;
// find address of window's record
int hidden = NO;
_wrec_t* found = wfindrec(whandle);
if(found==NULL) {
found = gwin.hidden;
while(found) {
if(whandle==found->whandle)
break;
found = found->prev;
}
if(found==NULL)
return gwin.werrno=W_NOTFOUND;
hidden = YES;
}
// see if window has a border
int border = found->border;
// calculate effective coordinates
int ecol = found->ecol-border;
__crow = found->srow+wrow+border;
__ccol = found->scol+wcol+border;
__gattr = attr;
__p = str;
// check for valid coordinates
if((__crow > (found->erow-border)) or (__ccol > ecol))
return gwin.werrno=W_INVCOORD;
// save current cursor position
int oldrow, oldcol;
if(gvid->isbios())
vposget(&oldrow,&oldcol);
// do while not end-of-string and not end-of-window
while(__ccol <= ecol and *__p) {
// see if output window is hidden. if so, then there
// is no need to check for blocking windows/shadows
if(hidden)
*(calc_window(found)) = vcatch(*__p, attr);
else {
// check all window records "above" window to activate
for(__curr=found->next; __curr!=NULL; __curr=__curr->next) {
// see if current position in window to activate
// is blocked by same position in test window
if(window_blocking()) {
// calculate buffer addresses and swap contents
update_buffers(calc_window(__curr), 0);
break;
}
// see if test window has a shadow
if(__curr->wsbuf!=NULL) {
// see if shadow to the right of test window is
// blocking the current position of window to activate
if(rshadow_blocking()) {
update_buffers(calc_rshadow(__curr), 1);
break;
}
// see if shadow to the bottom of test window is
// blocking the current position of window to activate
if(bshadow_blocking()) {
update_buffers(calc_bshadow(__curr), 1);
break;
}
}
}
// if current position is not blocked,
// then display char to screen
if(__curr==NULL)
vputc(__crow, __ccol, attr, *__p);
}
// update pointer into string and current column
__ccol++;
__p++;
}
// restore old cursor position
if(gvid->isbios())
vposset(oldrow,oldcol);
// return to caller
return gwin.werrno = *__p ? W_STRLONG : W_NOERROR;
}
// ------------------------------------------------------------------
int wwprintstr(int whandle, int wrow, int wcol, int attr, const char* str) {
// check for existance of active window or hidden windows
if(!gwin.total and gwin.hidden==NULL)
return gwin.werrno=W_NOACTIVE;
// find address of window's record
_wrec_t* found = wfindrec(whandle);
if(found==NULL) {
found = gwin.hidden;
while(found) {
if(whandle==found->whandle)
break;
found = found->prev;
}
if(found==NULL)
return gwin.werrno=W_NOTFOUND;
}
// display string
vputs(found->srow+wrow+found->border, found->scol+wcol+found->border, attr, str);
// return to caller
return gwin.werrno = W_NOERROR;
}
// ------------------------------------------------------------------
// Changes the active window's border box type
int wborder(int btype) {
register int border;
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// check for valid box type
if(btype<0||btype>7)
return gwin.werrno=W_INVBTYPE;
// see if window is to have a border
border = (btype==5) ? NO : YES;
// redraw window's border
vbox(
gwin.active->srow,
gwin.active->scol,
gwin.active->erow,
gwin.active->ecol,
btype,
border ? gwin.active->battr : gwin.active->wattr,
border ? gwin.active->loattr : gwin.active->wattr
);
// update window's record
gwin.active->btype=btype;
gwin.active->border=border;
// see if cursor position needs to be updated
if((gwin.active->row==gwin.active->srow) or
(gwin.active->row==gwin.active->erow) or
(gwin.active->column==gwin.active->scol) or
(gwin.active->column==gwin.active->ecol)) {
wgotoxy(0,0);
}
// re-display title if one exists
if(gwin.active->title!=NULL)
wtitle(gwin.active->title,gwin.active->tpos,gwin.active->tattr);
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Fills a region of active window w/specified char/attribute
int wfill(int wsrow, int wscol, int werow, int wecol, vchar chr, int atr) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// check for valid coordinates
if(wchkbox(wsrow,wscol,werow,wecol))
return gwin.werrno=W_INVCOORD;
// check for window border
const int &border = gwin.active->border;
// fill in specified region
vfill(
gwin.active->srow+wsrow+border,
gwin.active->scol+wscol+border,
gwin.active->srow+werow+border,
gwin.active->scol+wecol+border,
chr,
atr
);
// return with no error
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Returns the handle of the active window
int whandle() {
// test for active window
if(!gwin.total) {
gwin.werrno=W_NOACTIVE;
return 0;
}
// return normally
gwin.werrno = W_NOERROR;
return gwin.active->whandle;
}
// ------------------------------------------------------------------
// Displays text on window's top or bottom border
int wmessage(const char* str, int border, int leftofs, int attr) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// make sure window has a border
if(!gwin.active->border)
return gwin.werrno=W_NOBORDER;
int left = gwin.active->scol+1;
int right = gwin.active->ecol-1;
int width = right-left+1;
int len = strlen(str);
// Center string
if(leftofs < 0)
leftofs = (len > (width-2)) ? left : (((width/2)+left)-(len/2));
// make sure string fits in window
if((gwin.active->scol+leftofs+len-1) > (gwin.active->ecol))
return gwin.werrno=W_STRLONG;
// display string
vputs(border ? gwin.active->erow : gwin.active->srow, gwin.active->scol+leftofs, attr, str);
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
// Proportion bar
void wpropbar(int xx, int yy, long len, int attr, long pos, long size) {
// xx, yy = start position in window.
// len = length (in chars) of progress field.
// attr = color to use for progress field.
// pos = present position.
// size = total size of field.
const vchar barchar = _box_table(gwin.active->btype, 13);
#ifdef __UNIX__ // prefferable under xterm
const vchar thumbchar = ' ';
int thumbattr = revsattr(attr);
#else
const vchar thumbchar = '\xDB';
int thumbattr = attr;
#endif
long thumblen = (pos*len)/size;
int x = xx;
if(thumblen != 0) {
wputx(yy, x, thumbattr|ACSET, thumbchar, thumblen);
x += thumblen;
}
if(thumblen != len)
wputx(yy, x, attr|ACSET, barchar, len-thumblen);
}
// ------------------------------------------------------------------
// Gives active window a title
int wtitle(const char* str, int tpos, int tattr) {
// check for active window
if(!gwin.total)
return gwin.werrno=W_NOACTIVE;
// redraw box if deleting or moving title
if(str==NULL or gwin.active->title!=NULL) {
if(gwin.active->border) {
vputx(
((tpos&TBOTTOM) ? gwin.active->erow : gwin.active->srow),
gwin.active->scol+1,
gwin.active->battr|ACSET,
_box_table(gwin.active->btype, (tpos&TBOTTOM)?6:1),
gwin.active->ecol-gwin.active->scol-1
);
}
}
// if not deleting the title, calculate position and display it
if(str) {
int left = gwin.active->scol+1;
int right = gwin.active->ecol-1;
int width = right-left+1;
int len = strlen(str);
// don't display title if window is borderless
if(gwin.active->border) {
int start;
switch(tpos&~TBOTTOM) {
case TLEFT:
//start = (len>(width-3)) ? left : (left+1);
start = left;
break;
case TCENTER:
start = (len>(width-2)) ? left : (((width/2)+left)-(len/2));
break;
default: // default is TRIGHT
{
int offs = width-len;
if(offs>2)
offs--;
start = (len>width) ? left : (left+offs+1);
}
}
// allocate space for window title string, and copy it there
char* p = (char*)throw_xmalloc(((width>len) ? width : len)+1);
if(p==NULL)
return gwin.werrno=W_ALLOCERR;
strcpy(p, str);
*(p+width) = NUL;
// display title string
vputs((tpos&TBOTTOM)?gwin.active->erow:gwin.active->srow, start, tattr, p);
// free allocated space
throw_xfree(p);
}
}
// update window's record
gwin.active->title=str;
gwin.active->tpos=tpos;
gwin.active->tattr=tattr;
// return normally
return gwin.werrno=W_NOERROR;
}
// ------------------------------------------------------------------
void wscrollbar(int orientation, uint total, uint maxpos, uint pos, int sadd) {
int attr = (gwin.active->sbattr == -1) ? gwin.active->battr : gwin.active->sbattr;
int invattr = revsattr(attr);
const vchar barchar = _box_table(gwin.active->btype, 13);
const vchar arrowupchar = '\x18';
const vchar arrowdownchar = '\x19';
const vchar arrowleftchar = '\x1B';
const vchar arrowrightchar = '\x1A';
#ifdef __UNIX__ // prefferable under xterm
const vchar thumbchar = ' ';
int thumbattr = revsattr(attr);
#else
const vchar thumbchar = '\xDB';
int thumbattr = attr;
#endif
if(maxpos == 0)
maxpos = 1;
uint visiblelen;
if(orientation == W_VERT)
visiblelen = (gwin.active->erow - (gwin.active->srow+sadd)) + 1 - (gwin.active->border?2:0);
else
visiblelen = (gwin.active->ecol - (gwin.active->scol+sadd)) + 1 - (gwin.active->border?2:0) - 2;
uint barlen = visiblelen - 2;
uint thumblen = (visiblelen*barlen) / total;
if(thumblen == 0)
thumblen = 1;
else if(thumblen > barlen)
thumblen = barlen;
uint maxthumbpos = barlen - thumblen;
uint thumbpos = (pos*maxthumbpos) / maxpos;
uint thumbdiv = (pos*maxthumbpos) % maxpos;
if((thumbdiv >= (maxpos/2)) and (maxpos > 1))
thumbpos++;
if(thumbpos > maxthumbpos)
thumbpos = maxthumbpos;
barlen -= thumbpos + thumblen;
if(orientation == W_VERT) {
uint scol = gwin.active->ecol - gwin.active->scol - gwin.active->border;
vputc((sadd++)+gwin.active->srow+gwin.active->border, gwin.active->ecol, invattr|ACSET, arrowupchar);
if(thumbpos != 0) {
wputy(sadd, scol, attr|ACSET, barchar, thumbpos);
sadd += thumbpos;
}
if(thumblen != 0) {
wputy(sadd, scol, thumbattr|ACSET, thumbchar, thumblen);
sadd += thumblen;
}
if(barlen != 0) {
wputy(sadd, scol, attr|ACSET, barchar, barlen);
sadd += barlen;
}
vputc(sadd+gwin.active->srow+gwin.active->border, gwin.active->ecol, invattr|ACSET, arrowdownchar);
}
else {
uint srow = gwin.active->erow - gwin.active->srow - gwin.active->border;
vputc(gwin.active->erow, (sadd++)+gwin.active->scol+gwin.active->border, invattr|ACSET, arrowleftchar);
if(thumbpos != 0) {
wputx(srow, sadd, attr|ACSET, barchar, thumbpos);
sadd += thumbpos;
}
if(thumblen != 0) {
wputx(srow, sadd, thumbattr|ACSET, thumbchar, thumblen);
sadd += thumblen;
}
if(barlen != 0) {
wputx(srow, sadd, attr|ACSET, barchar, barlen);
sadd += barlen;
}
vputc(gwin.active->erow, sadd+gwin.active->scol+gwin.active->border, invattr|ACSET, arrowrightchar);
}
}
// ------------------------------------------------------------------