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screen/canvas.c
Daniel Baumann e88291c4cd
Adding upstream version 4.9.1. 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-22 15:19:57 +02:00

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/* Copyright (c) 2008, 2009
* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
* Micah Cowan (micah@cowan.name)
* Sadrul Habib Chowdhury (sadrul@users.sourceforge.net)
* Copyright (c) 1993-2002, 2003, 2005, 2006, 2007
* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
* Copyright (c) 1987 Oliver Laumann
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING); if not, see
* https://www.gnu.org/licenses/, or contact Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*
****************************************************************
*/
#include "config.h"
#include "screen.h"
#include "extern.h"
#include "canvas.h"
#include "list_generic.h"
extern struct display *display;
extern struct win *fore, *windows;
extern struct layer *flayer;
extern int captionalways;
extern struct LayFuncs BlankLf;
extern int focusminwidth, focusminheight;
static void
CanvasInitBlank(cv)
struct canvas *cv;
{
cv->c_blank.l_cvlist = cv;
cv->c_blank.l_width = cv->c_xe - cv->c_xs + 1;
cv->c_blank.l_height = cv->c_ye - cv->c_ys + 1;
cv->c_blank.l_x = cv->c_blank.l_y = 0;
cv->c_blank.l_layfn = &BlankLf;
cv->c_blank.l_data = 0;
cv->c_blank.l_next = 0;
cv->c_blank.l_bottom = &cv->c_blank;
cv->c_blank.l_blocking = 0;
cv->c_layer = &cv->c_blank;
}
static void
FreePerp(pcv)
struct canvas *pcv;
{
struct canvas *cv;
if (!pcv->c_slperp)
return;
cv = pcv->c_slperp;
cv->c_slprev = pcv->c_slprev;
if (cv->c_slprev)
cv->c_slprev->c_slnext = cv;
cv->c_slback = pcv->c_slback;
if (cv->c_slback && cv->c_slback->c_slperp == pcv)
cv->c_slback->c_slperp = cv;
cv->c_slorient = pcv->c_slorient;
cv->c_slweight = pcv->c_slweight;
while (cv->c_slnext)
{
cv = cv->c_slnext;
cv->c_slorient = pcv->c_slorient;
cv->c_slback = pcv->c_slback;
cv->c_slweight = pcv->c_slweight;
}
cv->c_slnext = pcv->c_slnext;
if (cv->c_slnext)
cv->c_slnext->c_slprev = cv;
LayerCleanupMemory(&pcv->c_blank);
free(pcv);
}
void
FreeCanvas(cv)
struct canvas *cv;
{
struct viewport *vp, *nvp;
struct canvas **cvp;
struct win *p;
if (cv->c_slprev)
cv->c_slprev->c_slnext = cv->c_slnext;
if (cv->c_slnext)
cv->c_slnext->c_slprev = cv->c_slprev;
if (cv->c_slback && cv->c_slback->c_slperp == cv)
cv->c_slback->c_slperp = cv->c_slnext ? cv->c_slnext : cv->c_slprev;
if (cv->c_slperp)
{
while (cv->c_slperp)
FreeCanvas(cv->c_slperp);
LayerCleanupMemory(&cv->c_blank);
free(cv);
return;
}
if (display)
{
if (D_forecv == cv)
D_forecv = 0;
/* remove from canvas chain as SetCanvasWindow might call
* some layer function */
for (cvp = &D_cvlist; *cvp ; cvp = &(*cvp)->c_next)
if (*cvp == cv)
{
*cvp = cv->c_next;
break;
}
}
p = cv->c_layer ? Layer2Window(cv->c_layer) : 0;
SetCanvasWindow(cv, 0);
if (p)
WindowChanged(p, 'u');
if (flayer == cv->c_layer)
flayer = 0;
for (vp = cv->c_vplist; vp; vp = nvp)
{
vp->v_canvas = 0;
nvp = vp->v_next;
vp->v_next = 0;
free(vp);
}
evdeq(&cv->c_captev);
LayerCleanupMemory(&cv->c_blank);
free(cv);
}
int
CountCanvas(cv)
struct canvas *cv;
{
int num = 0;
for (; cv; cv = cv->c_slnext)
{
if (cv->c_slperp)
{
struct canvas *cvp;
int nump = 1, n;
for (cvp = cv->c_slperp; cvp; cvp = cvp->c_slnext)
if (cvp->c_slperp)
{
n = CountCanvas(cvp->c_slperp);
if (n > nump)
nump = n;
}
num += nump;
}
else
num++;
}
return num;
}
int
CountCanvasPerp(cv)
struct canvas *cv;
{
struct canvas *cvp;
int num = 1, n;
for (cvp = cv->c_slperp; cvp; cvp = cvp->c_slnext)
if (cvp->c_slperp)
{
n = CountCanvas(cvp->c_slperp);
if (n > num)
num = n;
}
return num;
}
struct canvas *
FindCanvas(x, y)
int x, y;
{
struct canvas *cv, *mcv = 0;
int m, mm = 0;
for (cv = D_cvlist; cv; cv = cv->c_next)
{
/* ye + 1 because of caption line */
if (x >= cv->c_xs && x <= cv->c_xe && y >= cv->c_ys && y <= cv->c_ye + 1)
return cv;
if (cv == D_forecv)
continue;
m = 0;
if (x >= D_forecv->c_xs && x <= D_forecv->c_xe)
{
if (x < cv->c_xs || x > cv->c_xe)
continue;
if (y < D_forecv->c_ys && y < cv->c_ys)
continue;
if (y > D_forecv->c_ye + 1 && y > cv->c_ye + 1)
continue;
if (y < cv->c_ys)
m = cv->c_ys - y;
if (y > cv->c_ye + 1)
m = y - (cv->c_ye + 1);
}
if (y >= D_forecv->c_ys && y <= D_forecv->c_ye + 1)
{
if (y < cv->c_ys || y > cv->c_ye + 1)
continue;
if (x < D_forecv->c_xs && x < cv->c_xs)
continue;
if (x > D_forecv->c_xe && x > cv->c_xe)
continue;
if (x < cv->c_xs)
m = cv->c_xs - x;
if (x > cv->c_xe)
m = x - cv->c_xe;
}
if (m && (!mm || m < mm))
{
mcv = cv;
mm = m;
}
}
return mcv ? mcv : D_forecv;
}
void
SetCanvasWindow(cv, wi)
struct canvas *cv;
struct win *wi;
{
struct win *p = 0, **pp;
struct layer *l;
struct canvas *cvp, **cvpp;
l = cv->c_layer;
display = cv->c_display;
if (l)
{
/* remove old layer */
for (cvpp = &l->l_cvlist; (cvp = *cvpp); cvpp = &cvp->c_lnext)
if (cvp == cv)
break;
ASSERT(cvp);
*cvpp = cvp->c_lnext;
p = Layer2Window(l);
l = cv->c_layer;
cv->c_layer = 0;
if (p && cv == D_forecv)
{
#ifdef MULTIUSER
ReleaseAutoWritelock(display, p);
#endif
if (p->w_silence)
{
SetTimeout(&p->w_silenceev, p->w_silencewait * 1000);
evenq(&p->w_silenceev);
}
D_other = fore;
D_fore = 0;
}
if (l->l_cvlist == 0 && (p == 0 || l != p->w_savelayer))
KillLayerChain(l);
}
/* find right layer to display on canvas */
if (wi && wi->w_type != W_TYPE_GROUP)
{
l = &wi->w_layer;
if (wi->w_savelayer && (wi->w_blocked || wi->w_savelayer->l_cvlist == 0))
l = wi->w_savelayer;
}
else
{
l = &cv->c_blank;
if (wi)
l->l_data = (char *)wi;
else
l->l_data = 0;
}
/* add our canvas to the layer's canvaslist */
ASSERT(l->l_cvlist != cv);
cv->c_lnext = l->l_cvlist;
l->l_cvlist = cv;
cv->c_layer = l;
cv->c_xoff = cv->c_xs;
cv->c_yoff = cv->c_ys;
RethinkViewportOffsets(cv);
if (flayer == 0)
flayer = l;
if (wi && wi->w_type == W_TYPE_GROUP)
{
/* auto-start windowlist on groups */
struct display *d = display;
struct layer *oldflayer = flayer;
flayer = l;
display_windows(0, 0, wi);
flayer = oldflayer;
display = d;
}
if (wi && D_other == wi)
D_other = wi->w_next; /* Might be 0, but that's OK. */
if (cv == D_forecv)
{
D_fore = wi;
fore = D_fore; /* XXX ? */
if (wi)
{
#ifdef MULTIUSER
ObtainAutoWritelock(display, wi);
#endif
/*
* Place the window at the head of the most-recently-used list
*/
if (windows != wi)
{
for (pp = &windows; (p = *pp); pp = &p->w_next)
if (p == wi)
break;
ASSERT(p);
*pp = p->w_next;
p->w_next = windows;
windows = p;
WListLinkChanged();
}
}
}
}
static void
cv_winid_fn(ev, data)
struct event *ev;
char *data;
{
int ox, oy;
struct canvas *cv = (struct canvas *)data;
display = cv->c_display;
if (D_status == STATUS_ON_WIN)
{
SetTimeout(ev, 1);
evenq(ev);
return;
}
ox = D_x;
oy = D_y;
if (cv->c_ye + 1 < D_height)
RefreshLine(cv->c_ye + 1, 0, D_width - 1, 0);
if (ox != -1 && oy != -1)
GotoPos(ox, oy);
}
int
MakeDefaultCanvas()
{
struct canvas *cv;
ASSERT(display);
if ((cv = (struct canvas *)calloc(1, sizeof *cv)) == 0)
return -1;
cv->c_xs = 0;
cv->c_xe = D_width - 1;
cv->c_ys = (D_has_hstatus == HSTATUS_FIRSTLINE);
cv->c_ye = D_height - 1 - (D_has_hstatus == HSTATUS_LASTLINE) - captionalways;
debug2("MakeDefaultCanvas 0,0 %d,%d\n", cv->c_xe, cv->c_ye);
cv->c_xoff = 0;
cv->c_yoff = 0;
cv->c_next = 0;
cv->c_display = display;
cv->c_vplist = 0;
cv->c_slnext = 0;
cv->c_slprev = 0;
cv->c_slperp = 0;
cv->c_slweight = 1;
cv->c_slback = &D_canvas;
D_canvas.c_slperp = cv;
D_canvas.c_xs = cv->c_xs;
D_canvas.c_xe = cv->c_xe;
D_canvas.c_ys = cv->c_ys;
D_canvas.c_ye = cv->c_ye;
cv->c_slorient = SLICE_UNKN;
cv->c_captev.type = EV_TIMEOUT;
cv->c_captev.data = (char *)cv;
cv->c_captev.handler = cv_winid_fn;
CanvasInitBlank(cv);
cv->c_lnext = 0;
D_cvlist = cv;
RethinkDisplayViewports();
D_forecv = cv; /* default input focus */
return 0;
}
static struct canvas **
CreateCanvasChainRec(cv, cvp)
struct canvas *cv;
struct canvas **cvp;
{
for (; cv; cv = cv->c_slnext)
{
if (cv->c_slperp)
cvp = CreateCanvasChainRec(cv->c_slperp, cvp);
else
{
*cvp = cv;
cvp = &cv->c_next;
}
}
return cvp;
}
void
RecreateCanvasChain()
{
struct canvas **cvp;
cvp = CreateCanvasChainRec(D_canvas.c_slperp, &D_cvlist);
*cvp = 0;
}
void
EqualizeCanvas(cv, gflag)
struct canvas *cv;
int gflag;
{
struct canvas *cv2;
for (; cv; cv = cv->c_slnext)
{
if (cv->c_slperp && gflag)
{
cv->c_slweight = CountCanvasPerp(cv);
for (cv2 = cv->c_slperp; cv2; cv2 = cv2->c_slnext)
if (cv2->c_slperp)
EqualizeCanvas(cv2->c_slperp, gflag);
}
else
cv->c_slweight = 1;
}
}
void
ResizeCanvas(cv)
struct canvas *cv;
{
struct canvas *cv2, *cvn, *fcv;
int nh, i, maxi, hh, m, w, wsum;
int need, got;
int xs, ys, xe, ye;
int focusmin = 0;
xs = cv->c_xs;
ys = cv->c_ys;
xe = cv->c_xe;
ye = cv->c_ye;
cv = cv->c_slperp;
debug2("ResizeCanvas: %d,%d", xs, ys);
debug2(" %d,%d\n", xe, ye);
if (cv == 0)
return;
if (cv->c_slorient == SLICE_UNKN)
{
ASSERT(!cv->c_slnext && !cv->c_slperp);
cv->c_xs = xs;
cv->c_xe = xe;
cv->c_ys = ys;
cv->c_ye = ye;
cv->c_xoff = cv->c_xs;
cv->c_yoff = cv->c_ys;
cv->c_blank.l_width = cv->c_xe - cv->c_xs + 1;
cv->c_blank.l_height = cv->c_ye - cv->c_ys + 1;
return;
}
fcv = 0;
if (focusminwidth || focusminheight)
{
debug("searching for focus canvas\n");
cv2 = D_forecv;
while (cv2->c_slback)
{
if (cv2->c_slback == cv->c_slback)
{
fcv = cv2;
focusmin = cv->c_slorient == SLICE_VERT ? focusminheight : focusminwidth;
if (focusmin > 0)
focusmin--;
else if (focusmin < 0)
focusmin = cv->c_slorient == SLICE_VERT ? ye - ys + 2 : xe - xs + 2;
debug1("found, focusmin=%d\n", focusmin);
}
cv2 = cv2->c_slback;
}
}
if (focusmin)
{
m = CountCanvas(cv) * 2;
nh = cv->c_slorient == SLICE_VERT ? ye - ys + 2 : xe - xs + 2;
nh -= m;
if (nh < 0)
nh = 0;
if (focusmin > nh)
focusmin = nh;
debug1("corrected to %d\n", focusmin);
}
/* pass 1: calculate weight sum */
for (cv2 = cv, wsum = 0; cv2; cv2 = cv2->c_slnext)
{
debug1(" weight %d\n", cv2->c_slweight);
wsum += cv2->c_slweight;
}
debug1("wsum = %d\n", wsum);
if (wsum == 0)
wsum = 1;
w = wsum;
/* pass 2: calculate need/excess space */
nh = cv->c_slorient == SLICE_VERT ? ye - ys + 2 : xe - xs + 2;
for (cv2 = cv, need = got = 0; cv2; cv2 = cv2->c_slnext)
{
m = cv2->c_slperp ? CountCanvasPerp(cv2) * 2 - 1 : 1;
if (cv2 == fcv)
m += focusmin;
hh = cv2->c_slweight ? nh * cv2->c_slweight / w : 0;
w -= cv2->c_slweight;
nh -= hh;
debug2(" should %d min %d\n", hh, m);
if (hh <= m + 1)
need += m + 1 - hh;
else
got += hh - m - 1;
}
debug2("need: %d, got %d\n", need, got);
if (need > got)
need = got;
/* pass 3: distribute space */
nh = cv->c_slorient == SLICE_VERT ? ye - ys + 2 : xe - xs + 2;
i = cv->c_slorient == SLICE_VERT ? ys : xs;
maxi = cv->c_slorient == SLICE_VERT ? ye : xe;
w = wsum;
for (; cv; cv = cvn)
{
cvn = cv->c_slnext;
if (i > maxi)
{
if (cv->c_slprev && !cv->c_slback->c_slback && !cv->c_slprev->c_slperp && !cv->c_slprev->c_slprev)
{
cv->c_slprev->c_slorient = SLICE_UNKN;
if (!captionalways)
{
cv->c_slback->c_ye++;
cv->c_slprev->c_ye++;
}
}
SetCanvasWindow(cv, 0);
FreeCanvas(cv);
continue;
}
m = cv->c_slperp ? CountCanvasPerp(cv) * 2 - 1 : 1;
if (cv == fcv)
m += focusmin;
hh = cv->c_slweight ? nh * cv->c_slweight / w : 0;
w -= cv->c_slweight;
nh -= hh;
debug2(" should %d min %d\n", hh, m);
if (hh <= m + 1)
{
hh = m + 1;
debug1(" -> %d\n", hh);
}
else
{
int hx = 1; //FIXME Division by zero (got) is posible. "hx = 1" is random number here!!!
if (got != 0)
hx = need * (hh - m - 1) / got;
else
debug(" got = 0\n");
debug3(" -> %d - %d = %d\n", hh, hx, hh - hx);
got -= (hh - m - 1);
hh -= hx;
need -= hx;
debug2(" now need=%d got=%d\n", need, got);
}
ASSERT(hh >= m + 1);
/* hh is window size plus pation line */
if (i + hh > maxi + 2)
{
hh = maxi + 2 - i;
debug1(" not enough space, reducing to %d\n", hh);
}
if (i + hh == maxi + 1)
{
hh++;
debug(" incrementing as no other canvas will fit\n");
}
if (cv->c_slorient == SLICE_VERT)
{
cv->c_xs = xs;
cv->c_xe = xe;
cv->c_ys = i;
cv->c_ye = i + hh - 2;
cv->c_xoff = xs;
cv->c_yoff = i;
}
else
{
cv->c_xs = i;
cv->c_xe = i + hh - 2;
cv->c_ys = ys;
cv->c_ye = ye;
cv->c_xoff = i;
cv->c_yoff = ys;
}
cv->c_xoff = cv->c_xs;
cv->c_yoff = cv->c_ys;
cv->c_blank.l_width = cv->c_xe - cv->c_xs + 1;
cv->c_blank.l_height = cv->c_ye - cv->c_ys + 1;
if (cv->c_slperp)
{
ResizeCanvas(cv);
if (!cv->c_slperp->c_slnext)
{
debug("deleting perp node\n");
FreePerp(cv->c_slperp);
FreePerp(cv);
}
}
i += hh;
}
}
static struct canvas *
AddPerp(cv)
struct canvas *cv;
{
struct canvas *pcv;
debug("Creating new perp node\n");
if ((pcv = (struct canvas *)calloc(1, sizeof *cv)) == 0)
return 0;
pcv->c_next = 0;
pcv->c_display = cv->c_display;
pcv->c_slnext = cv->c_slnext;
pcv->c_slprev = cv->c_slprev;
pcv->c_slperp = cv;
pcv->c_slback = cv->c_slback;
if (cv->c_slback && cv->c_slback->c_slperp == cv)
cv->c_slback->c_slperp = pcv;
pcv->c_slorient = cv->c_slorient;
pcv->c_xoff = 0;
pcv->c_yoff = 0;
pcv->c_xs = cv->c_xs;
pcv->c_xe = cv->c_xe;
pcv->c_ys = cv->c_ys;
pcv->c_ye = cv->c_ye;
if (pcv->c_slnext)
pcv->c_slnext->c_slprev = pcv;
if (pcv->c_slprev)
pcv->c_slprev->c_slnext = pcv;
pcv->c_slweight = cv->c_slweight;
CanvasInitBlank(pcv);
cv->c_slweight = 1;
cv->c_slnext = 0;
cv->c_slprev = 0;
cv->c_slperp = 0;
cv->c_slback = pcv;
cv->c_slorient = SLICE_UNKN;
return pcv;
}
int
AddCanvas(orient)
int orient;
{
struct canvas *cv;
int xs, xe, ys, ye;
int h, num;
cv = D_forecv;
debug2("AddCanvas orient %d, forecv is %d\n", orient, cv->c_slorient);
if (cv->c_slorient != SLICE_UNKN && cv->c_slorient != orient)
if (!AddPerp(cv))
return -1;
cv = D_forecv;
xs = cv->c_slback->c_xs;
xe = cv->c_slback->c_xe;
ys = cv->c_slback->c_ys;
ye = cv->c_slback->c_ye;
if (!captionalways && cv == D_canvas.c_slperp && !cv->c_slnext)
ye--; /* need space for caption */
debug2("Adding Canvas to slice %d,%d ", xs, ys);
debug2("%d,%d\n", xe, ye);
num = CountCanvas(cv->c_slback->c_slperp) + 1;
debug1("Num = %d\n", num);
if (orient == SLICE_VERT)
h = ye - ys + 1;
else
h = xe - xs + 1;
h -= 2 * num - 1;
if (h < 0)
return -1; /* can't fit in */
if ((cv = (struct canvas *)calloc(1, sizeof *cv)) == 0)
return -1;
D_forecv->c_slback->c_ye = ye; /* in case we modified it above */
D_forecv->c_slorient = orient; /* in case it was UNKN */
cv->c_slnext = D_forecv->c_slnext;
cv->c_slprev = D_forecv;
D_forecv->c_slnext = cv;
if (cv->c_slnext)
cv->c_slnext->c_slprev = cv;
cv->c_slorient = orient;
cv->c_slback = D_forecv->c_slback;
cv->c_xs = xs;
cv->c_xe = xe;
cv->c_ys = ys;
cv->c_ye = ye;
cv->c_xoff = 0;
cv->c_yoff = 0;
cv->c_display = display;
cv->c_vplist = 0;
cv->c_captev.type = EV_TIMEOUT;
cv->c_captev.data = (char *)cv;
cv->c_captev.handler = cv_winid_fn;
CanvasInitBlank(cv);
cv->c_lnext = 0;
cv->c_next = 0;
cv = cv->c_slback;
EqualizeCanvas(cv->c_slperp, 0);
ResizeCanvas(cv);
RecreateCanvasChain();
RethinkDisplayViewports();
ResizeLayersToCanvases();
return 0;
}
void
RemCanvas()
{
int ye;
struct canvas *cv;
debug("RemCanvas\n");
cv = D_forecv;
ye = cv->c_slback->c_ye;
if (cv->c_slorient == SLICE_UNKN)
return;
while (cv->c_slprev)
cv = cv->c_slprev;
if (!cv->c_slnext)
return;
if (!cv->c_slnext->c_slnext && cv->c_slback->c_slback)
{
/* two canvases in slice, kill perp node */
cv = D_forecv;
debug("deleting perp node\n");
FreePerp(cv->c_slprev ? cv->c_slprev : cv->c_slnext);
FreePerp(cv->c_slback);
}
/* free canvas */
cv = D_forecv;
D_forecv = cv->c_slprev;
if (!D_forecv)
D_forecv = cv->c_slnext;
FreeCanvas(cv);
cv = D_forecv;
while (D_forecv->c_slperp)
D_forecv = D_forecv->c_slperp;
/* if only one canvas left, set orient back to unknown */
if (!cv->c_slnext && !cv->c_slprev && !cv->c_slback->c_slback && !cv->c_slperp)
{
cv->c_slorient = SLICE_UNKN;
if (!captionalways)
cv->c_slback->c_ye = ++ye; /* caption line no longer needed */
}
cv = cv->c_slback;
EqualizeCanvas(cv->c_slperp, 0);
ResizeCanvas(cv);
D_fore = Layer2Window(D_forecv->c_layer);
flayer = D_forecv->c_layer;
RecreateCanvasChain();
RethinkDisplayViewports();
ResizeLayersToCanvases();
}
void
OneCanvas()
{
struct canvas *cv = D_forecv, *ocv = 0;
if (cv->c_slprev)
{
ocv = cv->c_slprev;
cv->c_slprev->c_slnext = cv->c_slnext;
}
if (cv->c_slnext)
{
ocv = cv->c_slnext;
cv->c_slnext->c_slprev = cv->c_slprev;
}
if (!ocv)
return;
if (cv->c_slback && cv->c_slback->c_slperp == cv)
cv->c_slback->c_slperp = ocv;
cv->c_slorient = SLICE_UNKN;
while (D_canvas.c_slperp)
FreeCanvas(D_canvas.c_slperp);
cv = D_forecv;
D_canvas.c_slperp = cv;
cv->c_slback = &D_canvas;
cv->c_slnext = 0;
cv->c_slprev = 0;
ASSERT(!cv->c_slperp);
if (!captionalways)
D_canvas.c_ye++; /* caption line no longer needed */
ResizeCanvas(&D_canvas);
RecreateCanvasChain();
RethinkDisplayViewports();
ResizeLayersToCanvases();
}
void
DupLayoutCv(cvf, cvt, save)
struct canvas *cvf, *cvt;
int save;
{
while(cvf)
{
cvt->c_slorient = cvf->c_slorient;
cvt->c_slweight = cvf->c_slweight;
if (cvf == D_forecv)
D_forecv = cvt;
if (!save)
{
cvt->c_display = display;
if (!cvf->c_slperp)
{
cvt->c_captev.type = EV_TIMEOUT;
cvt->c_captev.data = (char *)cvt;
cvt->c_captev.handler = cv_winid_fn;
cvt->c_blank.l_cvlist = 0;
cvt->c_blank.l_layfn = &BlankLf;
cvt->c_blank.l_bottom = &cvt->c_blank;
}
cvt->c_layer = cvf->c_layer;
}
else
{
struct win *p = cvf->c_layer ? Layer2Window(cvf->c_layer) : 0;
cvt->c_layer = p ? &p->w_layer : 0;
}
if (cvf->c_slperp)
{
cvt->c_slperp = (struct canvas *)calloc(1, sizeof(struct canvas));
cvt->c_slperp->c_slback = cvt;
CanvasInitBlank(cvt->c_slperp);
DupLayoutCv(cvf->c_slperp, cvt->c_slperp, save);
}
if (cvf->c_slnext)
{
cvt->c_slnext = (struct canvas *)calloc(1, sizeof(struct canvas));
cvt->c_slnext->c_slprev = cvt;
cvt->c_slnext->c_slback = cvt->c_slback;
CanvasInitBlank(cvt->c_slnext);
}
cvf = cvf->c_slnext;
cvt = cvt->c_slnext;
}
}
void
PutWindowCv(cv)
struct canvas *cv;
{
struct win *p;
for (; cv; cv = cv->c_slnext)
{
if (cv->c_slperp)
{
PutWindowCv(cv->c_slperp);
continue;
}
p = cv->c_layer ? (struct win *)cv->c_layer->l_data : 0;
cv->c_layer = 0;
SetCanvasWindow(cv, p);
}
}
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