diff options
Diffstat (limited to 'generic/tkPlace.c')
| -rw-r--r-- | generic/tkPlace.c | 47 |
1 files changed, 43 insertions, 4 deletions
diff --git a/generic/tkPlace.c b/generic/tkPlace.c index 757891a..c2df875 100644 --- a/generic/tkPlace.c +++ b/generic/tkPlace.c @@ -10,7 +10,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tkPlace.c,v 1.13.2.1 2004/09/16 18:22:21 pspjuth Exp $ + * RCS: @(#) $Id: tkPlace.c,v 1.13.2.2 2007/10/25 16:38:23 dgp Exp $ */ #include "tkPort.h" @@ -133,6 +133,12 @@ typedef struct Master { Tk_Window tkwin; /* Tk's token for master window. */ struct Slave *slavePtr; /* First in linked list of slaves * placed relative to this master. */ + int *abortPtr; /* If non-NULL, it means that there is a nested + * call to RecomputePlacement already working on + * this window. *abortPtr may be set to 1 to + * abort that nested call. This happens, for + * example, if tkwin or any of its slaves + * is deleted. */ int flags; /* See below for bit definitions. */ } Master; @@ -513,6 +519,10 @@ UnlinkSlave(slavePtr) } } } + + if (masterPtr->abortPtr != NULL) { + *masterPtr->abortPtr = 1; + } slavePtr->masterPtr = NULL; } @@ -547,6 +557,7 @@ CreateMaster(tkwin) masterPtr = (Master *) ckalloc(sizeof(Master)); masterPtr->tkwin = tkwin; masterPtr->slavePtr = NULL; + masterPtr->abortPtr = NULL; masterPtr->flags = 0; Tcl_SetHashValue(hPtr, masterPtr); Tk_CreateEventHandler(masterPtr->tkwin, StructureNotifyMask, @@ -838,15 +849,34 @@ RecomputePlacement(clientData) int masterWidth, masterHeight, masterX, masterY; double x1, y1, x2, y2; + int abort; /* May get set to non-zero to abort this + * placement operation. */ + masterPtr->flags &= ~PARENT_RECONFIG_PENDING; + + /* + * Abort any nested call to RecomputePlacement for this window, since + * we'll do everything necessary here, and set up so this call + * can be aborted if necessary. + */ + + if (masterPtr->abortPtr != NULL) { + *masterPtr->abortPtr = 1; + } + masterPtr->abortPtr = &abort; + abort = 0; + Tcl_Preserve((ClientData) masterPtr); /* * Iterate over all the slaves for the master. Each slave's * geometry can be computed independently of the other slaves. + * Changes to the window's structure could cause almost anything + * to happen, including deleting the parent or child. If this + * happens, we'll be told to abort. */ - for (slavePtr = masterPtr->slavePtr; slavePtr != NULL; - slavePtr = slavePtr->nextPtr) { + for (slavePtr = masterPtr->slavePtr; slavePtr != NULL && !abort; + slavePtr = slavePtr->nextPtr) { /* * Step 1: compute size and borderwidth of master, taking into * account desired border mode. @@ -986,6 +1016,9 @@ RecomputePlacement(clientData) || (height != Tk_Height(slavePtr->tkwin))) { Tk_MoveResizeWindow(slavePtr->tkwin, x, y, width, height); } + if (abort) { + break; + } /* * Don't map the slave unless the master is mapped: the slave @@ -1005,6 +1038,9 @@ RecomputePlacement(clientData) } } } + + masterPtr->abortPtr = NULL; + Tcl_Release((ClientData) masterPtr); } /* @@ -1054,7 +1090,10 @@ MasterStructureProc(clientData, eventPtr) Tcl_CancelIdleCall(RecomputePlacement, (ClientData) masterPtr); } masterPtr->tkwin = NULL; - ckfree((char *) masterPtr); + if (masterPtr->abortPtr != NULL) { + *masterPtr->abortPtr = 1; + } + Tcl_EventuallyFree((ClientData) masterPtr, TCL_DYNAMIC); } else if (eventPtr->type == MapNotify) { /* * When a master gets mapped, must redo the geometry computation |