tw.c

举世闻名的joe记事本源程序

	TW *tw = (TW *) bw->object;

	if (bw->o.linums != bw->linums) {
		bw->linums = bw->o.linums;
		resizetw(bw, w->w, w->h);
		movetw(bw, w->x, w->y);
		bwfllw(bw);
	}

	if (bw->o.hex) {
		w->cury = (bw->cursor->byte-bw->top->byte)/16 + bw->y - w->y;
		w->curx = (bw->cursor->byte-bw->top->byte)%16 + 60 - bw->offset;
	} else {
		w->cury = bw->cursor->line - bw->top->line + bw->y - w->y;
		w->curx = bw->cursor->xcol - bw->offset + (bw->o.linums ? LINCOLS : 0);
	}

	if ((staupd || keepup || bw->cursor->line != tw->prevline || bw->b->changed != tw->changed || bw->b != tw->prev_b) && (w->y || !staen)) {
		int fill;

		tw->prevline = bw->cursor->line;
		tw->changed = bw->b->changed;
		tw->prev_b = bw->b;
		if (bw->o.rmsg[0])
			fill = bw->o.rmsg[0];
		else
			fill = ' ';
		tw->stalin = stagen(tw->stalin, bw, bw->o.lmsg, fill);
		tw->staright = stagen(tw->staright, bw, bw->o.rmsg, fill);
		if (fmtlen(tw->staright) < w->w) {
			int x = fmtpos(tw->stalin, w->w - fmtlen(tw->staright));

			if (x > sLEN(tw->stalin))
				tw->stalin = vsfill(sv(tw->stalin), fill, x - sLEN(tw->stalin));
			tw->stalin = vsncpy(tw->stalin, fmtpos(tw->stalin, w->w - fmtlen(tw->staright)), sv(tw->staright));
		}
		tw->stalin = vstrunc(tw->stalin, fmtpos(tw->stalin, w->w));
		genfmt(w->t->t, w->x, w->y, 0, tw->stalin, bg_stalin, 0);
		w->t->t->updtab[w->y] = 0;
	}

	if (flg) {
		if (bw->o.hex)
			bwgenh(bw);
		else
			bwgen(bw, bw->o.linums);
	}
}

/* Split current window */

static void iztw(TW *tw, int y)
{
	tw->stalin = NULL;
	tw->staright = NULL;
	tw->changed = -1;
	tw->prevline = -1;
	tw->staon = (!staen || y);
	tw->prev_b = 0;
}

int usplitw(BW *bw)
{
	W *w = bw->parent;
	int newh = getgrouph(w);
	W *new;
	TW *newtw;
	BW *newbw;

	dostaupd = 1;
	if (newh / 2 < FITHEIGHT)
		return -1;
	new = wcreate(w->t, w->watom, findbotw(w), NULL, w, newh / 2 + (newh & 1), NULL, NULL);
	if (!new)
		return -1;
	wfit(new->t);
	new->object = (void *) (newbw = bwmk(new, bw->b, 0));
	++bw->b->count;
	newbw->offset = bw->offset;
	newbw->object = (void *) (newtw = (TW *) joe_malloc(sizeof(TW)));
	iztw(newtw, new->y);
	pset(newbw->top, bw->top);
	pset(newbw->cursor, bw->cursor);
	newbw->cursor->xcol = bw->cursor->xcol;
	new->t->curwin = new;
	return 0;
}

int uduptw(BW *bw)
{
	W *w = bw->parent;
	int newh = getgrouph(w);
	W *new;
	TW *newtw;
	BW *newbw;

	dostaupd = 1;
	new = wcreate(w->t, w->watom, findbotw(w), NULL, NULL, newh, NULL, NULL);
	if (!new)
		return -1;
	if (demotegroup(w))
		new->t->topwin = new;
	new->object = (void *) (newbw = bwmk(new, bw->b, 0));
	++bw->b->count;
	newbw->offset = bw->offset;
	newbw->object = (void *) (newtw = (TW *) joe_malloc(sizeof(TW)));
	iztw(newtw, new->y);
	pset(newbw->top, bw->top);
	pset(newbw->cursor, bw->cursor);
	newbw->cursor->xcol = bw->cursor->xcol;
	new->t->curwin = new;
	wfit(w->t);
	return 0;
}

static void instw(BW *bw, B *b, long int l, long int n, int flg)
{
	if (b == bw->b)
		bwins(bw, l, n, flg);
}

static void deltw(BW *bw, B *b, long int l, long int n, int flg)
{
	if (b == bw->b)
		bwdel(bw, l, n, flg);
}

WATOM watomtw = {
	USTR "main",
	disptw,
	bwfllw,
	NULL,
	rtntw,
	utypebw,
	resizetw,
	movetw,
	instw,
	deltw,
	TYPETW
};

int abortit(BW *bw)
{
	W *w;
	TW *tw;
	B *b;
	if (bw->parent->watom != &watomtw)
		return wabort(bw->parent);
	if (bw->b->pid && bw->b->count==1)
		return ukillpid(bw);
	w = bw->parent;
	tw = (TW *) bw->object;
	/* If only one main window on the screen... */
	if (countmain(w->t) == 1)
		/* Replace it with an orphaned buffer if there are any */
		if ((b = borphan()) != NULL) {
			void *object = bw->object;
			/* FIXME: Shouldn't we wabort() and wcreate here to kill
			   any prompt windows? */

			bwrm(bw);
			w->object = (void *) (bw = bwmk(w, b, 0));
			wredraw(bw->parent);
			bw->object = object;
			return 0;
		}
	bwrm(bw);
	vsrm(tw->stalin);
	joe_free(tw);
	w->object = NULL;
	wabort(w);	/* Eliminate this window and it's children */
	return 0;
}

/* User routine for aborting a text window */

static int naborttw(BW *bw, int k, void *object, int *notify)
{
	if (notify)
		*notify = 1;
	if (k != YES_CODE && !yncheck(yes_key, k))
		return -1;

	genexmsg(bw, 0, NULL);
	return abortit(bw);
}

static int naborttw1(BW *bw, int k, void *object, int *notify)
{
	if (notify)
		*notify = 1;
	if (k != YES_CODE && !yncheck(yes_key, k))
		return -1;

	if (!exmsg) genexmsg(bw, 0, NULL);
	return abortit(bw);
}

/* k is last character types which lead to uabort.  If k is -1, it means uabort
   was called internally, and not by the user: which means uabort will not send
   Ctrl-C to process */
int uabort(BW *bw, int k)
{
	if (bw->parent->watom != &watomtw)
		return wabort(bw->parent);
	if (bw->b->pid && bw->b->count==1)
		return ukillpid(bw);
	if (bw->b->changed && bw->b->count == 1 && !bw->b->scratch)
		if (mkqw(bw->parent, sz(joe_gettext(_("Lose changes to this file (y,n,^C)? "))), naborttw, NULL, NULL, NULL))
			return 0;
		else
			return -1;
	else
		return naborttw(bw, YES_CODE, NULL, NULL);
}

int ucancel(BW *bw, int k)
{
	if (bw->parent->watom != &watomtw) {
		wabort(bw->parent);
		return 0;
	} else
		return uabort(bw,k);
}

/* Same as above, but only calls genexmsg if nobody else has */

int uabort1(BW *bw, int k)
{
	if (bw->parent->watom != &watomtw)
		return wabort(bw->parent);
	if (bw->b->pid && bw->b->count==1)
		return ukillpid(bw);
	if (bw->b->changed && bw->b->count == 1 && !bw->b->scratch)
		if (mkqw(bw->parent, sz(joe_gettext(_("Lose changes to this file (y,n,^C)? "))), naborttw1, NULL, NULL, NULL))
			return 0;
		else
			return -1;
	else
		return naborttw1(bw, YES_CODE, NULL, NULL);
}

/* Abort buffer without prompting: just fail if this is last window on buffer */

int uabortbuf(BW *bw)
{
	W *w = bw->parent;
	B *b;

	if (bw->b->pid && bw->b->count==1)
		return ukillpid(bw);

	if (okrepl(bw))
		return -1;

	if ((b = borphan()) != NULL) {
		void *object = bw->object;

		bwrm(bw);
		w->object = (void *) (bw = bwmk(w, b, 0));
		wredraw(bw->parent);
		bw->object = object;
		return 0;
	}

	return naborttw(bw, YES_CODE, NULL, NULL);
}

/* Kill current window (orphans buffer) */

int utw0(BASE *b)
{
	BW *bw = b->parent->main->object;

	if (countmain(b->parent->t) == 1)
		return -1;
	if (bw->b->count == 1)
		orphit(bw);
	return uabort(bw, -1);
}

/* Kill all other windows (orphans buffers) */

int utw1(BASE *b)
{
	W *starting = b->parent;
	W *mainw = starting->main;
	Screen *t = mainw->t;
	int yn;

	do {
		yn = 0;
	      loop:
		do {
			wnext(t);
		} while (t->curwin->main == mainw && t->curwin != starting);
		if (t->curwin->main != mainw) {
			BW *bw = t->curwin->main->object;
			utw0((BASE *)bw);
			yn = 1;
			goto loop;
		}
	} while (yn);
	return 0;
}

void setline(B *b, long int line)
{
	W *w = maint->curwin;

	do {
		if (w->watom->what == TYPETW) {
			BW *bw = w->object;

			if (bw->b == b) {
				long oline = bw->top->line;

				/* pline(bw->top, line); */
				pline(bw->cursor, line);
				if (w->y >= 0 && bw->top->line > oline && bw->top->line - oline < bw->h)
					nscrlup(w->t->t, bw->y, bw->y + bw->h, (int) (bw->top->line - oline));
				else if (w->y >= 0 && bw->top->line < oline && oline - bw->top->line < bw->h)
					nscrldn(w->t->t, bw->y, bw->y + bw->h, (int) (oline - bw->top->line));
				msetI(bw->t->t->updtab + bw->y, 1, bw->h);
			}
		}
	} while ((w = w->link.next) != maint->curwin);
	/* In case error buffer was orphaned */
	if (errbuf == b && b->oldcur) {
		pline(b->oldcur, line);
	}
}

/* Create a text window.  It becomes the last window on the screen */

BW *wmktw(Screen *t, B *b)
{
	W *w;
	BW *bw;
	TW *tw;

	w = wcreate(t, &watomtw, NULL, NULL, NULL, t->h, NULL, NULL);
	wfit(w->t);
	w->object = (void *) (bw = bwmk(w, b, 0));
	bw->object = (void *) (tw = (TW *) joe_malloc(sizeof(TW)));
	iztw(tw, w->y);
	return bw;
}