/*
* Calculate window clip lists for rootless mode
*
* This file is very closely based on mivaltree.c.
*/
/* $XFree86: xc/programs/Xserver/hw/darwin/quartz/rootlessValTree.c,v 1.2 2002/06/18 19:43:04 torrey Exp $ */
/*
* mivaltree.c --
* Functions for recalculating window clip lists. Main function
* is miValidateTree.
*
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*
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*
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*
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/* The panoramix components contained the following notice */
/****************************************************************
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* Copyright (c) Digital Equipment Corporation, 1991, 1997 *
* *
* All Rights Reserved. Unpublished rights reserved under *
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* *
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/*
* Aug '86: Susan Angebranndt -- original code
* July '87: Adam de Boor -- substantially modified and commented
* Summer '89: Joel McCormack -- so fast you wouldn't believe it possible.
* In particular, much improved code for window mapping and
* circulating.
* Bob Scheifler -- avoid miComputeClips for unmapped windows,
* valdata changes
*/
#include "X.h"
#include "scrnintstr.h"
#include "validate.h"
#include "windowstr.h"
#include "mi.h"
#include "regionstr.h"
#include "mivalidate.h"
#include "globals.h"
#ifdef SHAPE
/*
* Compute the visibility of a shaped window
*/
int
RootlessShapedWindowIn (pScreen, universe, bounding, rect, x, y)
ScreenPtr pScreen;
RegionPtr universe, bounding;
BoxPtr rect;
register int x, y;
{
BoxRec box;
register BoxPtr boundBox;
int nbox;
Bool someIn, someOut;
register int t, x1, y1, x2, y2;
nbox = REGION_NUM_RECTS (bounding);
boundBox = REGION_RECTS (bounding);
someIn = someOut = FALSE;
x1 = rect->x1;
y1 = rect->y1;
x2 = rect->x2;
y2 = rect->y2;
while (nbox--)
{
if ((t = boundBox->x1 + x) < x1)
t = x1;
box.x1 = t;
if ((t = boundBox->y1 + y) < y1)
t = y1;
box.y1 = t;
if ((t = boundBox->x2 + x) > x2)
t = x2;
box.x2 = t;
if ((t = boundBox->y2 + y) > y2)
t = y2;
box.y2 = t;
if (box.x1 > box.x2)
box.x2 = box.x1;
if (box.y1 > box.y2)
box.y2 = box.y1;
switch (RECT_IN_REGION(pScreen, universe, &box))
{
case rgnIN:
if (someOut)
return rgnPART;
someIn = TRUE;
break;
case rgnOUT:
if (someIn)
return rgnPART;
someOut = TRUE;
break;
default:
return rgnPART;
}
boundBox++;
}
if (someIn)
return rgnIN;
return rgnOUT;
}
#endif
#define HasParentRelativeBorder(w) (!(w)->borderIsPixel && \
HasBorder(w) && \
(w)->backgroundState == ParentRelative)
/*
*-----------------------------------------------------------------------
* RootlessComputeClips --
* Recompute the clipList, borderClip, exposed and borderExposed
* regions for pParent and its children. Only viewable windows are
* taken into account.
*
* Results:
* None.
*
* Side Effects:
* clipList, borderClip, exposed and borderExposed are altered.
* A VisibilityNotify event may be generated on the parent window.
*
*-----------------------------------------------------------------------
*/
static void
RootlessComputeClips (pParent, pScreen, universe, kind, exposed)
register WindowPtr pParent;
register ScreenPtr pScreen;
register RegionPtr universe;
VTKind kind;
RegionPtr exposed; /* for intermediate calculations */
{
int dx,
dy;
RegionRec childUniverse;
register WindowPtr pChild;
int oldVis, newVis;
BoxRec borderSize;
RegionRec childUnion;
Bool overlap;
RegionPtr borderVisible;
Bool resized;
/*
* Figure out the new visibility of this window.
* The extent of the universe should be the same as the extent of
* the borderSize region. If the window is unobscured, this rectangle
* will be completely inside the universe (the universe will cover it
* completely). If the window is completely obscured, none of the
* universe will cover the rectangle.
*/
borderSize.x1 = pParent->drawable.x - wBorderWidth(pParent);
borderSize.y1 = pParent->drawable.y - wBorderWidth(pParent);
dx = (int) pParent->drawable.x + (int) pParent->drawable.width + wBorderWidth(pParent);
if (dx > 32767)
dx = 32767;
borderSize.x2 = dx;
dy = (int) pParent->drawable.y + (int) pParent->drawable.height + wBorderWidth(pParent);
if (dy > 32767)
dy = 32767;
borderSize.y2 = dy;
oldVis = pParent->visibility;
switch (RECT_IN_REGION( pScreen, universe, &borderSize))
{
case rgnIN:
newVis = VisibilityUnobscured;
break;
case rgnPART:
newVis = VisibilityPartiallyObscured;
#ifdef SHAPE
{
RegionPtr pBounding;
if ((pBounding = wBoundingShape (pParent)))
{
switch (RootlessShapedWindowIn (pScreen, universe,
pBounding, &borderSize,
pParent->drawable.x,
pParent->drawable.y))
{
case rgnIN:
newVis = VisibilityUnobscured;
break;
case rgnOUT:
newVis = VisibilityFullyObscured;
break;
}
}
}
#endif
break;
default:
newVis = VisibilityFullyObscured;
break;
}
pParent->visibility = newVis;
if (oldVis != newVis &&
((pParent->eventMask | wOtherEventMasks(pParent)) & VisibilityChangeMask))
SendVisibilityNotify(pParent);
dx = pParent->drawable.x - pParent->valdata->before.oldAbsCorner.x;
dy = pParent->drawable.y - pParent->valdata->before.oldAbsCorner.y;
/*
* avoid computations when dealing with simple operations
*/
switch (kind) {
case VTMap:
case VTStack:
case VTUnmap:
break;
case VTMove:
if ((oldVis == newVis) &&
((oldVis == VisibilityFullyObscured) ||
(oldVis == VisibilityUnobscured)))
{
pChild = pParent;
while (1)
{
if (pChild->viewable)
{
if (pChild->visibility != VisibilityFullyObscured)
{
REGION_TRANSLATE( pScreen, &pChild->borderClip,
dx, dy);
REGION_TRANSLATE( pScreen, &pChild->clipList,
dx, dy);
pChild->drawable.serialNumber = NEXT_SERIAL_NUMBER;
if (pScreen->ClipNotify)
(* pScreen->ClipNotify) (pChild, dx, dy);
}
if (pChild->valdata)
{
REGION_INIT(pScreen,
&pChild->valdata->after.borderExposed,
NullBox, 0);
if (HasParentRelativeBorder(pChild))
{
REGION_SUBTRACT(pScreen,
&pChild->valdata->after.borderExposed,
&pChild->borderClip,
&pChild->winSize);
}
REGION_INIT( pScreen, &pChild->valdata->after.exposed,
NullBox, 0);
}
if (pChild->firstChild)
{
pChild = pChild->firstChild;
continue;
}
}
while (!pChild->nextSib && (pChild != pParent))
pChild = pChild->parent;
if (pChild == pParent)
break;
pChild = pChild->nextSib;
}
return;
}
/* fall through */
default:
/*
* To calculate exposures correctly, we have to translate the old
* borderClip and clipList regions to the window's new location so there
* is a correspondence between pieces of the new and old clipping regions.
*/
if (dx || dy)
{
/*
* We translate the old clipList because that will be exposed or copied
* if gravity is right.
*/
REGION_TRANSLATE( pScreen, &pParent->borderClip, dx, dy);
REGION_TRANSLATE( pScreen, &pParent->clipList, dx, dy);
}
break;
case VTBroken:
REGION_EMPTY (pScreen, &pParent->borderClip);
REGION_EMPTY (pScreen, &pParent->clipList);
break;
}
borderVisible = pParent->valdata->before.borderVisible;
resized = pParent->valdata->before.resized;
REGION_INIT( pScreen, &pParent->valdata->after.borderExposed, NullBox, 0);
REGION_INIT( pScreen, &pParent->valdata->after.exposed, NullBox, 0);
/*
* Since the borderClip must not be clipped by the children, we do
* the border exposure first...
*
* 'universe' is the window's borderClip. To figure the exposures, remove
* the area that used to be exposed from the new.
* This leaves a region of pieces that weren't exposed before.
*/
if (HasBorder (pParent))
{
if (borderVisible)
{
/*
* when the border changes shape, the old visible portions
* of the border will be saved by DIX in borderVisible --
* use that region and destroy it
*/
REGION_SUBTRACT( pScreen, exposed, universe, borderVisible);
REGION_DESTROY( pScreen, borderVisible);
}
else
{
REGION_SUBTRACT( pScreen, exposed, universe, &pParent->borderClip);
}
if (HasParentRelativeBorder(pParent) && (dx || dy)) {
REGION_SUBTRACT( pScreen, &pParent->valdata->after.borderExposed,
universe,
&pParent->winSize);
} else {
REGION_SUBTRACT( pScreen, &pParent->valdata->after.borderExposed,
exposed, &pParent->winSize);
}
REGION_COPY( pScreen, &pParent->borderClip, universe);
/*
* To get the right clipList for the parent, and to make doubly sure
* that no child overlaps the parent's border, we remove the parent's
* border from the universe before proceeding.
*/
REGION_INTERSECT( pScreen, universe, universe, &pParent->winSize);
}
else
REGION_COPY( pScreen, &pParent->borderClip, universe);
if ((pChild = pParent->firstChild) && pParent->mapped)
{
REGION_INIT(pScreen, &childUniverse, NullBox, 0);
REGION_INIT(pScreen, &childUnion, NullBox, 0);
if ((pChild->drawable.y < pParent->lastChild->drawable.y) ||
((pChild->drawable.y == pParent->lastChild->drawable.y) &&
(pChild->drawable.x < pParent->lastChild->drawable.x)))
{
for (; pChild; pChild = pChild->nextSib)
{
if (pChild->viewable)
REGION_APPEND( pScreen, &childUnion, &pChild->borderSize);
}
}
else
{
for (pChild = pParent->lastChild; pChild; pChild = pChild->prevSib)
{
if (pChild->viewable)
REGION_APPEND( pScreen, &childUnion, &pChild->borderSize);
}
}
REGION_VALIDATE( pScreen, &childUnion, &overlap);
for (pChild = pParent->firstChild;
pChild;
pChild = pChild->nextSib)
{
if (pChild->viewable) {
/*
* If the child is viewable, we want to remove its extents
* from the current universe, but we only re-clip it if
* it's been marked.
*/
if (pChild->valdata) {
/*
* Figure out the new universe from the child's
* perspective and recurse.
*/
REGION_INTERSECT( pScreen, &childUniverse,
universe,
&pChild->borderSize);
RootlessComputeClips (pChild, pScreen, &childUniverse,
kind, exposed);
}
/*
* Once the child has been processed, we remove its extents
* from the current universe, thus denying its space to any
* other sibling.
*/
if (overlap)
REGION_SUBTRACT( pScreen, universe, universe,
&pChild->borderSize);
}
}
if (!overlap)
REGION_SUBTRACT( pScreen, universe, universe, &childUnion);
REGION_UNINIT( pScreen, &childUnion);
REGION_UNINIT( pScreen, &childUniverse);
} /* if any children */
/*
* 'universe' now contains the new clipList for the parent window.
*
* To figure the exposure of the window we subtract the old clip from the
* new, just as for the border.
*/
if (oldVis == VisibilityFullyObscured ||
oldVis == VisibilityNotViewable)
{
REGION_COPY( pScreen, &pParent->valdata->after.exposed, universe);
}
else if (newVis != VisibilityFullyObscured &&
newVis != VisibilityNotViewable)
{
REGION_SUBTRACT( pScreen, &pParent->valdata->after.exposed,
universe, &pParent->clipList);
}
/*
* One last thing: backing storage. We have to try to save what parts of
* the window are about to be obscured. We can just subtract the universe
* from the old clipList and get the areas that were in the old but aren't
* in the new and, hence, are about to be obscured.
*/
if (pParent->backStorage && !resized)
{
REGION_SUBTRACT( pScreen, exposed, &pParent->clipList, universe);
(* pScreen->SaveDoomedAreas)(pParent, exposed, dx, dy);
}
/* HACK ALERT - copying contents of regions, instead of regions */
{
RegionRec tmp;
tmp = pParent->clipList;
pParent->clipList = *universe;
*universe = tmp;
}
#ifdef NOTDEF
REGION_COPY( pScreen, &pParent->clipList, universe);
#endif
pParent->drawable.serialNumber = NEXT_SERIAL_NUMBER;
if (pScreen->ClipNotify)
(* pScreen->ClipNotify) (pParent, dx, dy);
}
static void
RootlessTreeObscured(pParent)
register WindowPtr pParent;
{
register WindowPtr pChild;
register int oldVis;
pChild = pParent;
while (1)
{
if (pChild->viewable)
{
oldVis = pChild->visibility;
if (oldVis != (pChild->visibility = VisibilityFullyObscured) &&
((pChild->eventMask | wOtherEventMasks(pChild)) & VisibilityChangeMask))
SendVisibilityNotify(pChild);
if (pChild->firstChild)
{
pChild = pChild->firstChild;
continue;
}
}
while (!pChild->nextSib && (pChild != pParent))
pChild = pChild->parent;
if (pChild == pParent)
break;
pChild = pChild->nextSib;
}
}
/*
*-----------------------------------------------------------------------
* RootlessMiValidateTree --
* Recomputes the clip list for pParent and all its inferiors.
*
* Results:
* Always returns 1.
*
* Side Effects:
* The clipList, borderClip, exposed, and borderExposed regions for
* each marked window are altered.
*
* Notes:
* This routine assumes that all affected windows have been marked
* (valdata created) and their winSize and borderSize regions
* adjusted to correspond to their new positions. The borderClip and
* clipList regions should not have been touched.
*
* The top-most level is treated differently from all lower levels
* because pParent is unchanged. For the top level, we merge the
* regions taken up by the marked children back into the clipList
* for pParent, thus forming a region from which the marked children
* can claim their areas. For lower levels, where the old clipList
* and borderClip are invalid, we can't do this and have to do the
* extra operations done in miComputeClips, but this is much faster
* e.g. when only one child has moved...
*
*-----------------------------------------------------------------------
*/
/*
Quartz version: used for validate from root in rootless mode.
We need to make sure top-level windows don't clip each other,
and that top-level windows aren't clipped to the root window.
*/
/*ARGSUSED*/
// fixme this is ugly
// Xprint/ValTree.c doesn't work, but maybe that method can?
int
RootlessMiValidateTree (pRoot, pChild, kind)
WindowPtr pRoot; /* Parent to validate */
WindowPtr pChild; /* First child of pRoot that was
* affected */
VTKind kind; /* What kind of configuration caused call */
{
RegionRec childClip; /* The new borderClip for the current
* child */
RegionRec exposed; /* For intermediate calculations */
register ScreenPtr pScreen;
register WindowPtr pWin;
pScreen = pRoot->drawable.pScreen;
if (pChild == NullWindow)
pChild = pRoot->firstChild;
REGION_INIT(pScreen, &childClip, NullBox, 0);
REGION_INIT(pScreen, &exposed, NullBox, 0);
if (REGION_BROKEN (pScreen, &pRoot->clipList) &&
!REGION_BROKEN (pScreen, &pRoot->borderClip))
{
// fixme this might not work, but hopefully doesn't happen anyway.
kind = VTBroken;
REGION_EMPTY (pScreen, &pRoot->clipList);
ErrorF("ValidateTree: BUSTED!\n");
}
/*
* Recursively compute the clips for all children of the root.
* They don't clip against each other or the root itself, so
* childClip is always reset to that child's size.
*/
for (pWin = pChild;
pWin != NullWindow;
pWin = pWin->nextSib)
{
if (pWin->viewable) {
if (pWin->valdata) {
REGION_COPY( pScreen, &childClip, &pWin->borderSize);
RootlessComputeClips (pWin, pScreen, &childClip, kind, &exposed);
} else if (pWin->visibility == VisibilityNotViewable) {
RootlessTreeObscured(pWin);
}
} else {
if (pWin->valdata) {
REGION_EMPTY( pScreen, &pWin->clipList);
if (pScreen->ClipNotify)
(* pScreen->ClipNotify) (pWin, 0, 0);
REGION_EMPTY( pScreen, &pWin->borderClip);
pWin->valdata = (ValidatePtr)NULL;
}
}
}
REGION_UNINIT( pScreen, &childClip);
/* The root is never clipped by its children, so nothing on the root
is ever exposed by moving or mapping its children. */
REGION_INIT( pScreen, &pRoot->valdata->after.exposed, NullBox, 0);
REGION_INIT( pScreen, &pRoot->valdata->after.borderExposed, NullBox, 0);
return 1;
}