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/* ------------- editor.c ------------ */
#include "dflat.h"
#define pTab ('\t' + 0x80)
#define sTab ('\f' + 0x80)
/* ---------- SETTEXT Message ------------ */
static int SetTextMsg(WINDOW wnd, char *Buf)
{
unsigned char *tp,*ep,*ttp;
int x=0,sz=0,rtn;
tp=Buf;
/* Compute the buffer size based on tabs in the text */
while (*tp)
{
if (*tp == '\t')
{
/* Tab, adjust the buffer length */
int sps=cfg.Tabs-(x % cfg.Tabs);
sz+=sps;
x+=sps;
}
else
{
/* Not a tab, count the character */
sz++;
x++;
}
if (*tp == '\n')
x=0; /* Newline, reset x */
tp++;
}
ep=DFcalloc(1, sz+1); /* Allocate a buffer */
/* Detab the input file */
tp=Buf;
ttp=ep;
x=0;
while (*tp)
{
x++; /* Put the character (\t, too) into the buffer */
/* Expand tab into subst tab (\f + 0x80) and expansions (\t + 0x80) */
if (*tp == '\t')
{
*ttp++ = sTab; /* Substitute tab character */
while ((x % cfg.Tabs) != 0)
*ttp++ = pTab, x++;
}
else
{
*ttp++ = *tp;
if (*tp == '\n')
x=0;
}
tp++;
}
*ttp='\0';
rtn=BaseWndProc(EDITOR, wnd, SETTEXT, (PARAM) ep, 0);
free(ep);
return rtn;
}
void CollapseTabs(WINDOW wnd)
{
unsigned char *cp = wnd->text, *cp2;
while (*cp)
{
if (*cp == pTab)
{
*cp='\t';
cp2=cp;
while (*++cp2 == sTab);
memmove(cp+1, cp2, strlen(cp2)+1);
}
cp++;
}
}
void ExpandTabs(WINDOW wnd)
{
int Holdwtop = wnd->wtop, Holdwleft = wnd->wleft, HoldRow = wnd->CurrLine, HoldCol = wnd->CurrCol, HoldwRow = wnd->WndRow;
SendMessage(wnd, SETTEXT, (PARAM) wnd->text, 0);
wnd->wtop=Holdwtop;
wnd->wleft=Holdwleft;
wnd->CurrLine=HoldRow;
wnd->CurrCol=HoldCol;
wnd->WndRow=HoldwRow;
SendMessage(wnd, PAINT, 0, 0);
SendMessage(wnd, KEYBOARD_CURSOR, 0, wnd->WndRow);
}
/* --- When inserting or deleting, adjust next following tab, same line --- */
static void AdjustTab(WINDOW wnd)
{
int col=wnd->CurrCol;
while (*CurrChar && *CurrChar != '\n')
{
if (*CurrChar == sTab)
{
int exp=(cfg.Tabs-1)-(wnd->CurrCol % cfg.Tabs);
wnd->CurrCol++;
while (*CurrChar == pTab)
BaseWndProc(EDITOR, wnd, KEYBOARD, DEL, 0);
while (exp--)
BaseWndProc(EDITOR, wnd, KEYBOARD, pTab, 0);
break;
}
wnd->CurrCol++;
}
wnd->CurrCol=col;
}
static void TurnOffDisplay(WINDOW wnd)
{
SendMessage(NULL, HIDE_CURSOR, 0, 0);
ClearVisible(wnd);
}
static void TurnOnDisplay(WINDOW wnd)
{
SetVisible(wnd);
SendMessage(NULL, SHOW_CURSOR, 0, 0);
}
static void RepaintLine(WINDOW wnd)
{
SendMessage(wnd, KEYBOARD_CURSOR, WndCol, wnd->WndRow);
WriteTextLine(wnd, NULL, wnd->CurrLine, FALSE);
}
/* --------- KEYBOARD Message ---------- */
static int KeyboardMsg(WINDOW wnd, PARAM p1, PARAM p2)
{
int c=(int) p1;
BOOL delnl;
PARAM pn=p1;
if (WindowMoving || WindowSizing || ((int)p2 & ALTKEY))
return FALSE;
switch (c)
{
case PGUP:
case PGDN:
case UP:
case DN:
pn=(PARAM) BS;
case FWD:
case LARROW:
TurnOffDisplay(wnd);
BaseWndProc(EDITOR, wnd, KEYBOARD, p1, p2);
while (*CurrChar == pTab)
BaseWndProc(EDITOR, wnd, KEYBOARD, pn, p2);
TurnOnDisplay(wnd);
return TRUE;
case DEL:
TurnOffDisplay(wnd);
delnl = *CurrChar == '\n' || TextBlockMarked(wnd);
BaseWndProc(EDITOR, wnd, KEYBOARD, p1, p2);
while (*CurrChar == pTab)
BaseWndProc(EDITOR, wnd, KEYBOARD, p1, p2);
AdjustTab(wnd);
TurnOnDisplay(wnd);
RepaintLine(wnd);
if (delnl)
SendMessage(wnd, PAINT, 0, 0);
return TRUE;
case '\t':
TurnOffDisplay(wnd);
BaseWndProc(EDITOR, wnd, KEYBOARD, (PARAM) sTab, p2);
while ((wnd->CurrCol % cfg.Tabs) != 0)
BaseWndProc(EDITOR, wnd, KEYBOARD, pTab, p2);
TurnOnDisplay(wnd);
RepaintLine(wnd);
return TRUE;
default:
if (((c & FKEY) == 0) && (isprint(c) || c == '\r'))
{
TurnOffDisplay(wnd);
BaseWndProc(EDITOR, wnd, KEYBOARD, p1, p2);
AdjustTab(wnd);
TurnOnDisplay(wnd);
RepaintLine(wnd);
if (c == '\r')
SendMessage(wnd, PAINT, 0, 0);
return TRUE;
}
break;
}
return FALSE;
}
/* ------- Window processing module for EDITBOX class ------ */
int EditorProc(WINDOW wnd, MESSAGE msg, PARAM p1, PARAM p2)
{
switch (msg)
{
case KEYBOARD:
if (KeyboardMsg(wnd, p1, p2))
return TRUE;
break;
case SETTEXT:
return SetTextMsg(wnd, (char *) p1);
default:
break;
}
return BaseWndProc(EDITOR, wnd, msg, p1, p2);
}
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