diff options
Diffstat (limited to 'generic/tkEntry.c')
| -rw-r--r-- | generic/tkEntry.c | 129 |
1 files changed, 97 insertions, 32 deletions
diff --git a/generic/tkEntry.c b/generic/tkEntry.c index f6ff9b9..338652b 100644 --- a/generic/tkEntry.c +++ b/generic/tkEntry.c @@ -391,7 +391,7 @@ static const char *selElementNames[] = { static int ConfigureEntry(Tcl_Interp *interp, Entry *entryPtr, int objc, Tcl_Obj *const objv[], int flags); -static void DeleteChars(Entry *entryPtr, int index, int count); +static int DeleteChars(Entry *entryPtr, int index, int count); static void DestroyEntry(char *memPtr); static void DisplayEntry(ClientData clientData); static void EntryBlinkProc(ClientData clientData); @@ -417,7 +417,7 @@ static int EntryValidateChange(Entry *entryPtr, char *change, static void ExpandPercents(Entry *entryPtr, const char *before, const char *change, const char *newStr, int index, int type, Tcl_DString *dsPtr); -static void EntryValueChanged(Entry *entryPtr, +static int EntryValueChanged(Entry *entryPtr, const char *newValue); static void EntryVisibleRange(Entry *entryPtr, double *firstPtr, double *lastPtr); @@ -427,7 +427,7 @@ static int EntryWidgetObjCmd(ClientData clientData, static void EntryWorldChanged(ClientData instanceData); static int GetEntryIndex(Tcl_Interp *interp, Entry *entryPtr, char *string, int *indexPtr); -static void InsertChars(Entry *entryPtr, int index, char *string); +static int InsertChars(Entry *entryPtr, int index, char *string); /* * These forward declarations are the spinbox specific ones: @@ -663,7 +663,7 @@ EntryWidgetObjCmd( break; case COMMAND_DELETE: { - int first, last; + int first, last, code; if ((objc < 3) || (objc > 4)) { Tcl_WrongNumArgs(interp, 2, objv, "firstIndex ?lastIndex?"); @@ -680,7 +680,10 @@ EntryWidgetObjCmd( goto error; } if ((last >= first) && (entryPtr->state == STATE_NORMAL)) { - DeleteChars(entryPtr, first, last - first); + code = DeleteChars(entryPtr, first, last - first); + if (code != TCL_OK) { + goto error; + } } break; } @@ -721,7 +724,7 @@ EntryWidgetObjCmd( } case COMMAND_INSERT: { - int index; + int index, code; if (objc != 4) { Tcl_WrongNumArgs(interp, 2, objv, "index text"); @@ -732,7 +735,10 @@ EntryWidgetObjCmd( goto error; } if (entryPtr->state == STATE_NORMAL) { - InsertChars(entryPtr, index, Tcl_GetString(objv[3])); + code = InsertChars(entryPtr, index, Tcl_GetString(objv[3])); + if (code != TCL_OK) { + goto error; + } } break; } @@ -1096,6 +1102,7 @@ ConfigureEntry( int valuesChanged = 0; /* lint initialization */ double oldFrom = 0.0; /* lint initialization */ double oldTo = 0.0; /* lint initialization */ + int code; /* * Eliminate any existing trace on a variable monitored by the entry. @@ -1298,6 +1305,17 @@ ConfigureEntry( value = Tcl_GetVar(interp, entryPtr->textVarName, TCL_GLOBAL_ONLY); if (value == NULL) { + + /* + * Since any trace on the textvariable was eliminated above, + * the only possible reason for EntryValueChanged to return + * an error is that the textvariable lives in a namespace + * that does not (yet) exist. Indeed, namespaces are not + * automatically created as needed. Don't trap this error + * here, better do it below when attempting to trace the + * variable. + */ + EntryValueChanged(entryPtr, NULL); } else { EntrySetValue(entryPtr, value); @@ -1316,7 +1334,13 @@ ConfigureEntry( */ Tcl_ListObjIndex(interp, sbPtr->listObj, 0, &objPtr); - EntryValueChanged(entryPtr, Tcl_GetString(objPtr)); + + /* + * No check for error return here as well, because any possible + * error will be trapped below when attempting tracing. + */ + + EntryValueChanged(entryPtr, Tcl_GetString(objPtr)); } else if ((sbPtr->valueStr == NULL) && !DOUBLES_EQ(sbPtr->fromValue, sbPtr->toValue) && (!DOUBLES_EQ(sbPtr->fromValue, oldFrom) @@ -1341,6 +1365,12 @@ ConfigureEntry( } } sprintf(sbPtr->formatBuf, sbPtr->valueFormat, dvalue); + + /* + * No check for error return here as well, because any possible + * error will be trapped below when attempting tracing. + */ + EntryValueChanged(entryPtr, sbPtr->formatBuf); } } @@ -1352,10 +1382,13 @@ ConfigureEntry( if ((entryPtr->textVarName != NULL) && !(entryPtr->flags & ENTRY_VAR_TRACED)) { - Tcl_TraceVar(interp, entryPtr->textVarName, + code = Tcl_TraceVar(interp, entryPtr->textVarName, TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, EntryTextVarProc, (ClientData) entryPtr); - entryPtr->flags |= ENTRY_VAR_TRACED; + if (code != TCL_OK) { + return TCL_ERROR; + } + entryPtr->flags |= ENTRY_VAR_TRACED; } EntryWorldChanged((ClientData) entryPtr); @@ -1990,7 +2023,8 @@ EntryComputeGeometry( * Add new characters to an entry widget. * * Results: - * None. + * A standard Tcl result. If an error occurred then an error message is + * left in the interp's result. * * Side effects: * New information gets added to entryPtr; it will be redisplayed soon, @@ -1999,7 +2033,7 @@ EntryComputeGeometry( *---------------------------------------------------------------------- */ -static void +static int InsertChars( Entry *entryPtr, /* Entry that is to get the new elements. */ int index, /* Add the new elements before this character @@ -2017,7 +2051,7 @@ InsertChars( byteIndex = Tcl_UtfAtIndex(string, index) - string; byteCount = strlen(value); if (byteCount == 0) { - return; + return TCL_OK; } newByteCount = entryPtr->numBytes + byteCount + 1; @@ -2031,7 +2065,7 @@ InsertChars( EntryValidateChange(entryPtr, value, newStr, index, VALIDATE_INSERT) != TCL_OK) { ckfree(newStr); - return; + return TCL_OK; } ckfree((char *)string); @@ -2079,7 +2113,7 @@ InsertChars( if (entryPtr->insertPos >= index) { entryPtr->insertPos += charsAdded; } - EntryValueChanged(entryPtr, NULL); + return EntryValueChanged(entryPtr, NULL); } /* @@ -2090,7 +2124,8 @@ InsertChars( * Remove one or more characters from an entry widget. * * Results: - * None. + * A standard Tcl result. If an error occurred then an error message is + * left in the interp's result. * * Side effects: * Memory gets freed, the entry gets modified and (eventually) @@ -2099,7 +2134,7 @@ InsertChars( *---------------------------------------------------------------------- */ -static void +static int DeleteChars( Entry *entryPtr, /* Entry widget to modify. */ int index, /* Index of first character to delete. */ @@ -2113,7 +2148,7 @@ DeleteChars( count = entryPtr->numChars - index; } if (count <= 0) { - return; + return TCL_OK; } string = entryPtr->string; @@ -2135,7 +2170,7 @@ DeleteChars( VALIDATE_DELETE) != TCL_OK) { ckfree(newStr); ckfree(toDelete); - return; + return TCL_OK; } ckfree(toDelete); @@ -2194,7 +2229,7 @@ DeleteChars( entryPtr->insertPos = index; } } - EntryValueChanged(entryPtr, NULL); + return EntryValueChanged(entryPtr, NULL); } /* @@ -2207,7 +2242,8 @@ DeleteChars( * is one, and does other bookkeeping such as arranging for redisplay. * * Results: - * None. + * A standard Tcl result. If an error occurred then an error message is + * left in the interp's result. * * Side effects: * None. @@ -2215,7 +2251,7 @@ DeleteChars( *---------------------------------------------------------------------- */ -static void +static int EntryValueChanged( Entry *entryPtr, /* Entry whose value just changed. */ const char *newValue) /* If this value is not NULL, we first force @@ -2229,7 +2265,7 @@ EntryValueChanged( newValue = NULL; } else { newValue = Tcl_SetVar(entryPtr->interp, entryPtr->textVarName, - entryPtr->string, TCL_GLOBAL_ONLY); + entryPtr->string, TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG); } if ((newValue != NULL) && (strcmp(newValue, entryPtr->string) != 0)) { @@ -2251,6 +2287,19 @@ EntryValueChanged( EntryComputeGeometry(entryPtr); EventuallyRedraw(entryPtr); } + + /* + * An error may have happened when setting the textvariable in case there + * is a trace on that variable and the trace proc triggered an error. + * Another possibility is that the textvariable is in a namespace that + * does not (yet) exist. + * Signal this error. + */ + + if ((entryPtr->textVarName != NULL) && (newValue == NULL)) { + return TCL_ERROR; + } + return TCL_OK; } /* @@ -3703,7 +3752,7 @@ SpinboxWidgetObjCmd( break; case SB_CMD_DELETE: { - int first, last; + int first, last, code; if ((objc < 3) || (objc > 4)) { Tcl_WrongNumArgs(interp, 2, objv, "firstIndex ?lastIndex?"); @@ -3722,7 +3771,10 @@ SpinboxWidgetObjCmd( } } if ((last >= first) && (entryPtr->state == STATE_NORMAL)) { - DeleteChars(entryPtr, first, last - first); + code = DeleteChars(entryPtr, first, last - first); + if (code != TCL_OK) { + goto error; + } } break; } @@ -3782,7 +3834,7 @@ SpinboxWidgetObjCmd( } case SB_CMD_INSERT: { - int index; + int index, code; if (objc != 4) { Tcl_WrongNumArgs(interp, 2, objv, "index text"); @@ -3793,7 +3845,10 @@ SpinboxWidgetObjCmd( goto error; } if (entryPtr->state == STATE_NORMAL) { - InsertChars(entryPtr, index, Tcl_GetString(objv[3])); + code = InsertChars(entryPtr, index, Tcl_GetString(objv[3])); + if (code != TCL_OK) { + goto error; + } } break; } @@ -4001,16 +4056,22 @@ SpinboxWidgetObjCmd( break; } - case SB_CMD_SET: + case SB_CMD_SET: { + int code = TCL_OK; + if (objc > 3) { Tcl_WrongNumArgs(interp, 2, objv, "?string?"); goto error; } if (objc == 3) { - EntryValueChanged(entryPtr, Tcl_GetString(objv[2])); + code = EntryValueChanged(entryPtr, Tcl_GetString(objv[2])); + if (code != TCL_OK) { + goto error; + } } Tcl_SetStringObj(Tcl_GetObjResult(interp), entryPtr->string, -1); break; + } case SB_CMD_VALIDATE: { int code; @@ -4151,7 +4212,7 @@ GetSpinboxElement( * TCL_OK. * * Side effects: - * An background error condition may arise when invoking the callback. + * A background error condition may arise when invoking the callback. * The widget value may change. * *-------------------------------------------------------------- @@ -4182,6 +4243,7 @@ SpinboxInvoke( return TCL_OK; } + code = TCL_OK; if (fabs(sbPtr->increment) > MIN_DBL_VAL) { if (sbPtr->listObj != NULL) { Tcl_Obj *objPtr; @@ -4227,7 +4289,7 @@ SpinboxInvoke( } } Tcl_ListObjIndex(interp, sbPtr->listObj, sbPtr->eIndex, &objPtr); - EntryValueChanged(entryPtr, Tcl_GetString(objPtr)); + code = EntryValueChanged(entryPtr, Tcl_GetString(objPtr)); } else if (!DOUBLES_EQ(sbPtr->fromValue, sbPtr->toValue)) { double dvalue; @@ -4274,9 +4336,12 @@ SpinboxInvoke( } } sprintf(sbPtr->formatBuf, sbPtr->valueFormat, dvalue); - EntryValueChanged(entryPtr, sbPtr->formatBuf); + code = EntryValueChanged(entryPtr, sbPtr->formatBuf); } } + if (code != TCL_OK) { + return TCL_ERROR; + } if (sbPtr->command != NULL) { Tcl_DStringInit(&script); |