+++ /dev/null
-/* $XConsortium: mivaltree.c,v 5.33 94/04/17 20:27:58 dpw Exp $ */
-/*
- * mivaltree.c --
- * Functions for recalculating window clip lists. Main function
- * is miValidateTree.
- *
-
-Copyright (c) 1987, 1988, 1989 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of the X Consortium shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from the X Consortium.
-
- *
- * Copyright 1987, 1988, 1989 by
- * Digital Equipment Corporation, Maynard, Massachusetts,
- *
- * All Rights Reserved
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted,
- * provided that the above copyright notice appear in all copies and that
- * both that copyright notice and this permission notice appear in
- * supporting documentation, and that the name of Digital not be
- * used in advertising or publicity pertaining to distribution of the
- * software without specific, written prior permission.
- *
- * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
- * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
- * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- *
- ******************************************************************/
-
- /*
- * 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"
-
-#ifdef SHAPE
-/*
- * Compute the visibility of a shaped window
- */
-miShapedWindowIn (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)
-
-/*-
- *-----------------------------------------------------------------------
- * miComputeClips --
- * 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
-miComputeClips (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 (miShapedWindowIn (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;
- }
-
- 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);
- miComputeClips (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
-miTreeObscured(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;
- }
-}
-
-/*-
- *-----------------------------------------------------------------------
- * miValidateTree --
- * 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...
- *
- *-----------------------------------------------------------------------
- */
-/*ARGSUSED*/
-int
-miValidateTree (pParent, pChild, kind)
- WindowPtr pParent; /* Parent to validate */
- WindowPtr pChild; /* First child of pParent that was
- * affected */
- VTKind kind; /* What kind of configuration caused call */
-{
- RegionRec totalClip; /* Total clipping region available to
- * the marked children. pParent's clipList
- * merged with the borderClips of all
- * the marked children. */
- RegionRec childClip; /* The new borderClip for the current
- * child */
- RegionRec childUnion; /* the space covered by borderSize for
- * all marked children */
- RegionRec exposed; /* For intermediate calculations */
- register ScreenPtr pScreen;
- register WindowPtr pWin;
- Bool overlap;
- int viewvals;
- Bool forward;
-
- pScreen = pParent->drawable.pScreen;
- if (pChild == NullWindow)
- pChild = pParent->firstChild;
-
- REGION_INIT(pScreen, &childClip, NullBox, 0);
- REGION_INIT(pScreen, &exposed, NullBox, 0);
-
- /*
- * compute the area of the parent window occupied
- * by the marked children + the parent itself. This
- * is the area which can be divied up among the marked
- * children in their new configuration.
- */
- REGION_INIT(pScreen, &totalClip, NullBox, 0);
- viewvals = 0;
- if ((pChild->drawable.y < pParent->lastChild->drawable.y) ||
- ((pChild->drawable.y == pParent->lastChild->drawable.y) &&
- (pChild->drawable.x < pParent->lastChild->drawable.x)))
- {
- forward = TRUE;
- for (pWin = pChild; pWin; pWin = pWin->nextSib)
- {
- if (pWin->valdata)
- {
- REGION_APPEND( pScreen, &totalClip, &pWin->borderClip);
- if (pWin->viewable)
- viewvals++;
- }
- }
- }
- else
- {
- forward = FALSE;
- pWin = pParent->lastChild;
- while (1)
- {
- if (pWin->valdata)
- {
- REGION_APPEND( pScreen, &totalClip, &pWin->borderClip);
- if (pWin->viewable)
- viewvals++;
- }
- if (pWin == pChild)
- break;
- pWin = pWin->prevSib;
- }
- }
- REGION_VALIDATE( pScreen, &totalClip, &overlap);
-
- /*
- * Now go through the children of the root and figure their new
- * borderClips from the totalClip, passing that off to miComputeClips
- * to handle recursively. Once that's done, we remove the child
- * from the totalClip to clip any siblings below it.
- */
-
- overlap = TRUE;
- if (kind != VTStack)
- {
- REGION_UNION( pScreen, &totalClip, &totalClip, &pParent->clipList);
- if (viewvals > 1)
- {
- /*
- * precompute childUnion to discover whether any of them
- * overlap. This seems redundant, but performance studies
- * have demonstrated that the cost of this loop is
- * lower than the cost of multiple Subtracts in the
- * loop below.
- */
- REGION_INIT(pScreen, &childUnion, NullBox, 0);
- if (forward)
- {
- for (pWin = pChild; pWin; pWin = pWin->nextSib)
- if (pWin->valdata && pWin->viewable)
- REGION_APPEND( pScreen, &childUnion,
- &pWin->borderSize);
- }
- else
- {
- pWin = pParent->lastChild;
- while (1)
- {
- if (pWin->valdata && pWin->viewable)
- REGION_APPEND( pScreen, &childUnion,
- &pWin->borderSize);
- if (pWin == pChild)
- break;
- pWin = pWin->prevSib;
- }
- }
- REGION_VALIDATE(pScreen, &childUnion, &overlap);
- if (overlap)
- REGION_UNINIT(pScreen, &childUnion);
- }
- }
-
- for (pWin = pChild;
- pWin != NullWindow;
- pWin = pWin->nextSib)
- {
- if (pWin->viewable) {
- if (pWin->valdata) {
- REGION_INTERSECT( pScreen, &childClip,
- &totalClip,
- &pWin->borderSize);
- miComputeClips (pWin, pScreen, &childClip, kind, &exposed);
- if (overlap)
- {
- REGION_SUBTRACT( pScreen, &totalClip,
- &totalClip,
- &pWin->borderSize);
- }
- } else if (pWin->visibility == VisibilityNotViewable) {
- miTreeObscured(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);
- if (!overlap)
- {
- REGION_SUBTRACT(pScreen, &totalClip, &totalClip, &childUnion);
- REGION_UNINIT(pScreen, &childUnion);
- }
-
- REGION_INIT( pScreen, &pParent->valdata->after.exposed, NullBox, 0);
- REGION_INIT( pScreen, &pParent->valdata->after.borderExposed, NullBox, 0);
-
- /*
- * each case below is responsible for updating the
- * clipList and serial number for the parent window
- */
-
- switch (kind) {
- case VTStack:
- break;
- default:
- /*
- * totalClip contains the new clipList for the parent. Figure out
- * exposures and obscures as per miComputeClips and reset the parent's
- * clipList.
- */
- REGION_SUBTRACT( pScreen, &pParent->valdata->after.exposed,
- &totalClip, &pParent->clipList);
- /* fall through */
- case VTMap:
- if (pParent->backStorage) {
- REGION_SUBTRACT( pScreen, &exposed, &pParent->clipList, &totalClip);
- (* pScreen->SaveDoomedAreas)(pParent, &exposed, 0, 0);
- }
-
- REGION_COPY( pScreen, &pParent->clipList, &totalClip);
- pParent->drawable.serialNumber = NEXT_SERIAL_NUMBER;
- break;
- }
-
- REGION_UNINIT( pScreen, &totalClip);
- REGION_UNINIT( pScreen, &exposed);
- if (pScreen->ClipNotify)
- (*pScreen->ClipNotify) (pParent, 0, 0);
- return (1);
-}
projects / rdpsrv / blobdiff