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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkselect.c,v 1.1.1.1 2001/06/13 05:08:09 dtashley Exp $ */ |
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/* |
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* tkSelect.c -- |
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* |
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* This file manages the selection for the Tk toolkit, |
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* translating between the standard X ICCCM conventions |
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* and Tcl commands. |
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* |
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* Copyright (c) 1990-1993 The Regents of the University of California. |
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* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
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* |
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* See the file "license.terms" for information on usage and redistribution |
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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* |
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* RCS: @(#) $Id: tkselect.c,v 1.1.1.1 2001/06/13 05:08:09 dtashley Exp $ |
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*/ |
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#include "tkInt.h" |
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#include "tkSelect.h" |
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/* |
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* When a selection handler is set up by invoking "selection handle", |
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* one of the following data structures is set up to hold information |
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* about the command to invoke and its interpreter. |
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*/ |
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typedef struct { |
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Tcl_Interp *interp; /* Interpreter in which to invoke command. */ |
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int cmdLength; /* # of non-NULL bytes in command. */ |
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int charOffset; /* The offset of the next char to retrieve. */ |
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int byteOffset; /* The expected byte offset of the next |
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* chunk. */ |
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char buffer[TCL_UTF_MAX]; /* A buffer to hold part of a UTF character |
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* that is split across chunks.*/ |
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char command[4]; /* Command to invoke. Actual space is |
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* allocated as large as necessary. This |
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* must be the last entry in the structure. */ |
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} CommandInfo; |
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/* |
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* When selection ownership is claimed with the "selection own" Tcl command, |
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* one of the following structures is created to record the Tcl command |
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* to be executed when the selection is lost again. |
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*/ |
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typedef struct LostCommand { |
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Tcl_Interp *interp; /* Interpreter in which to invoke command. */ |
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char command[4]; /* Command to invoke. Actual space is |
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* allocated as large as necessary. This |
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* must be the last entry in the structure. */ |
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} LostCommand; |
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/* |
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* The structure below is used to keep each thread's pending list |
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* separate. |
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*/ |
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typedef struct ThreadSpecificData { |
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TkSelInProgress *pendingPtr; |
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/* Topmost search in progress, or |
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* NULL if none. */ |
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} ThreadSpecificData; |
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static Tcl_ThreadDataKey dataKey; |
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/* |
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* Forward declarations for procedures defined in this file: |
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*/ |
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static int HandleTclCommand _ANSI_ARGS_((ClientData clientData, |
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int offset, char *buffer, int maxBytes)); |
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static void LostSelection _ANSI_ARGS_((ClientData clientData)); |
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static int SelGetProc _ANSI_ARGS_((ClientData clientData, |
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Tcl_Interp *interp, char *portion)); |
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/* |
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*-------------------------------------------------------------- |
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* |
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* Tk_CreateSelHandler -- |
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* |
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* This procedure is called to register a procedure |
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* as the handler for selection requests of a particular |
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* target type on a particular window for a particular |
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* selection. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* In the future, whenever the selection is in tkwin's |
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* window and someone requests the selection in the |
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* form given by target, proc will be invoked to provide |
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* part or all of the selection in the given form. If |
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* there was already a handler declared for the given |
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* window, target and selection type, then it is replaced. |
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* Proc should have the following form: |
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* |
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* int |
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* proc(clientData, offset, buffer, maxBytes) |
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* ClientData clientData; |
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* int offset; |
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* char *buffer; |
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* int maxBytes; |
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* { |
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* } |
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* |
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* The clientData argument to proc will be the same as |
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* the clientData argument to this procedure. The offset |
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* argument indicates which portion of the selection to |
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* return: skip the first offset bytes. Buffer is a |
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* pointer to an area in which to place the converted |
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* selection, and maxBytes gives the number of bytes |
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* available at buffer. Proc should place the selection |
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* in buffer as a string, and return a count of the number |
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* of bytes of selection actually placed in buffer (not |
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* including the terminating NULL character). If the |
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* return value equals maxBytes, this is a sign that there |
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* is probably still more selection information available. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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void |
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Tk_CreateSelHandler(tkwin, selection, target, proc, clientData, format) |
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Tk_Window tkwin; /* Token for window. */ |
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Atom selection; /* Selection to be handled. */ |
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Atom target; /* The kind of selection conversions |
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* that can be handled by proc, |
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* e.g. TARGETS or STRING. */ |
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Tk_SelectionProc *proc; /* Procedure to invoke to convert |
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* selection to type "target". */ |
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ClientData clientData; /* Value to pass to proc. */ |
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Atom format; /* Format in which the selection |
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* information should be returned to |
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* the requestor. XA_STRING is best by |
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* far, but anything listed in the ICCCM |
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* will be tolerated (blech). */ |
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{ |
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register TkSelHandler *selPtr; |
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TkWindow *winPtr = (TkWindow *) tkwin; |
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if (winPtr->dispPtr->multipleAtom == None) { |
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TkSelInit(tkwin); |
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} |
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/* |
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* See if there's already a handler for this target and selection on |
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* this window. If so, re-use it. If not, create a new one. |
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*/ |
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for (selPtr = winPtr->selHandlerList; ; selPtr = selPtr->nextPtr) { |
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if (selPtr == NULL) { |
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selPtr = (TkSelHandler *) ckalloc(sizeof(TkSelHandler)); |
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selPtr->nextPtr = winPtr->selHandlerList; |
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winPtr->selHandlerList = selPtr; |
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break; |
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} |
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if ((selPtr->selection == selection) && (selPtr->target == target)) { |
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/* |
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* Special case: when replacing handler created by |
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* "selection handle", free up memory. Should there be a |
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* callback to allow other clients to do this too? |
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*/ |
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if (selPtr->proc == HandleTclCommand) { |
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ckfree((char *) selPtr->clientData); |
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} |
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break; |
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} |
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} |
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selPtr->selection = selection; |
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selPtr->target = target; |
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selPtr->format = format; |
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selPtr->proc = proc; |
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selPtr->clientData = clientData; |
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if (format == XA_STRING) { |
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selPtr->size = 8; |
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} else { |
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selPtr->size = 32; |
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} |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tk_DeleteSelHandler -- |
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* |
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* Remove the selection handler for a given window, target, and |
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* selection, if it exists. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* The selection handler for tkwin and target is removed. If there |
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* is no such handler then nothing happens. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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void |
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Tk_DeleteSelHandler(tkwin, selection, target) |
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Tk_Window tkwin; /* Token for window. */ |
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Atom selection; /* The selection whose handler |
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* is to be removed. */ |
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Atom target; /* The target whose selection |
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* handler is to be removed. */ |
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{ |
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TkWindow *winPtr = (TkWindow *) tkwin; |
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register TkSelHandler *selPtr, *prevPtr; |
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register TkSelInProgress *ipPtr; |
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ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
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/* |
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* Find the selection handler to be deleted, or return if it doesn't |
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* exist. |
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*/ |
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for (selPtr = winPtr->selHandlerList, prevPtr = NULL; ; |
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prevPtr = selPtr, selPtr = selPtr->nextPtr) { |
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if (selPtr == NULL) { |
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return; |
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} |
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if ((selPtr->selection == selection) && (selPtr->target == target)) { |
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break; |
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} |
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} |
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/* |
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* If ConvertSelection is processing this handler, tell it that the |
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* handler is dead. |
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*/ |
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for (ipPtr = tsdPtr->pendingPtr; ipPtr != NULL; |
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ipPtr = ipPtr->nextPtr) { |
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if (ipPtr->selPtr == selPtr) { |
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ipPtr->selPtr = NULL; |
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} |
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} |
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/* |
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* Free resources associated with the handler. |
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*/ |
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if (prevPtr == NULL) { |
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winPtr->selHandlerList = selPtr->nextPtr; |
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} else { |
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prevPtr->nextPtr = selPtr->nextPtr; |
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} |
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if (selPtr->proc == HandleTclCommand) { |
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/* |
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* Mark the CommandInfo as deleted and free it if we can. |
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*/ |
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((CommandInfo*)selPtr->clientData)->interp = NULL; |
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Tcl_EventuallyFree(selPtr->clientData, Tcl_Free); |
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} |
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ckfree((char *) selPtr); |
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} |
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/* |
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*-------------------------------------------------------------- |
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* |
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* Tk_OwnSelection -- |
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* |
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* Arrange for tkwin to become the owner of a selection. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* From now on, requests for the selection will be directed |
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* to procedures associated with tkwin (they must have been |
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* declared with calls to Tk_CreateSelHandler). When the |
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* selection is lost by this window, proc will be invoked |
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* (see the manual entry for details). This procedure may |
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* invoke callbacks, including Tcl scripts, so any calling |
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* function should be reentrant at the point where |
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* Tk_OwnSelection is invoked. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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void |
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Tk_OwnSelection(tkwin, selection, proc, clientData) |
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Tk_Window tkwin; /* Window to become new selection |
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* owner. */ |
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Atom selection; /* Selection that window should own. */ |
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Tk_LostSelProc *proc; /* Procedure to call when selection |
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* is taken away from tkwin. */ |
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ClientData clientData; /* Arbitrary one-word argument to |
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* pass to proc. */ |
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{ |
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register TkWindow *winPtr = (TkWindow *) tkwin; |
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TkDisplay *dispPtr = winPtr->dispPtr; |
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TkSelectionInfo *infoPtr; |
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Tk_LostSelProc *clearProc = NULL; |
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ClientData clearData = NULL; /* Initialization needed only to |
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* prevent compiler warning. */ |
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if (dispPtr->multipleAtom == None) { |
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TkSelInit(tkwin); |
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} |
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Tk_MakeWindowExist(tkwin); |
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/* |
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* This code is somewhat tricky. First, we find the specified selection |
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* on the selection list. If the previous owner is in this process, and |
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* is a different window, then we need to invoke the clearProc. However, |
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* it's dangerous to call the clearProc right now, because it could |
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* invoke a Tcl script that wrecks the current state (e.g. it could |
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* delete the window). To be safe, defer the call until the end of the |
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* procedure when we no longer care about the state. |
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*/ |
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for (infoPtr = dispPtr->selectionInfoPtr; infoPtr != NULL; |
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infoPtr = infoPtr->nextPtr) { |
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if (infoPtr->selection == selection) { |
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break; |
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} |
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} |
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if (infoPtr == NULL) { |
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infoPtr = (TkSelectionInfo*) ckalloc(sizeof(TkSelectionInfo)); |
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infoPtr->selection = selection; |
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infoPtr->nextPtr = dispPtr->selectionInfoPtr; |
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dispPtr->selectionInfoPtr = infoPtr; |
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} else if (infoPtr->clearProc != NULL) { |
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if (infoPtr->owner != tkwin) { |
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clearProc = infoPtr->clearProc; |
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clearData = infoPtr->clearData; |
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} else if (infoPtr->clearProc == LostSelection) { |
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/* |
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* If the selection handler is one created by "selection own", |
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* be sure to free the record for it; otherwise there will be |
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* a memory leak. |
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*/ |
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ckfree((char *) infoPtr->clearData); |
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} |
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} |
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infoPtr->owner = tkwin; |
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infoPtr->serial = NextRequest(winPtr->display); |
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infoPtr->clearProc = proc; |
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infoPtr->clearData = clientData; |
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/* |
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* Note that we are using CurrentTime, even though ICCCM recommends against |
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* this practice (the problem is that we don't necessarily have a valid |
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* time to use). We will not be able to retrieve a useful timestamp for |
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* the TIMESTAMP target later. |
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*/ |
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infoPtr->time = CurrentTime; |
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/* |
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* Note that we are not checking to see if the selection claim succeeded. |
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* If the ownership does not change, then the clearProc may never be |
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* invoked, and we will return incorrect information when queried for the |
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* current selection owner. |
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*/ |
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XSetSelectionOwner(winPtr->display, infoPtr->selection, winPtr->window, |
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infoPtr->time); |
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/* |
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* Now that we are done, we can invoke clearProc without running into |
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* reentrancy problems. |
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*/ |
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if (clearProc != NULL) { |
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(*clearProc)(clearData); |
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} |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tk_ClearSelection -- |
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* |
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* Eliminate the specified selection on tkwin's display, if there is one. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* The specified selection is cleared, so that future requests to retrieve |
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* it will fail until some application owns it again. This procedure |
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* invokes callbacks, possibly including Tcl scripts, so any calling |
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* function should be reentrant at the point Tk_ClearSelection is invoked. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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void |
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Tk_ClearSelection(tkwin, selection) |
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Tk_Window tkwin; /* Window that selects a display. */ |
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Atom selection; /* Selection to be cancelled. */ |
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{ |
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register TkWindow *winPtr = (TkWindow *) tkwin; |
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TkDisplay *dispPtr = winPtr->dispPtr; |
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TkSelectionInfo *infoPtr; |
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TkSelectionInfo *prevPtr; |
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TkSelectionInfo *nextPtr; |
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Tk_LostSelProc *clearProc = NULL; |
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ClientData clearData = NULL; /* Initialization needed only to |
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* prevent compiler warning. */ |
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if (dispPtr->multipleAtom == None) { |
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TkSelInit(tkwin); |
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} |
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for (infoPtr = dispPtr->selectionInfoPtr, prevPtr = NULL; |
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infoPtr != NULL; infoPtr = nextPtr) { |
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nextPtr = infoPtr->nextPtr; |
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if (infoPtr->selection == selection) { |
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if (prevPtr == NULL) { |
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dispPtr->selectionInfoPtr = nextPtr; |
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} else { |
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prevPtr->nextPtr = nextPtr; |
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} |
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break; |
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} |
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prevPtr = infoPtr; |
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} |
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if (infoPtr != NULL) { |
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clearProc = infoPtr->clearProc; |
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clearData = infoPtr->clearData; |
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ckfree((char *) infoPtr); |
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} |
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XSetSelectionOwner(winPtr->display, selection, None, CurrentTime); |
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if (clearProc != NULL) { |
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(*clearProc)(clearData); |
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} |
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} |
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/* |
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*-------------------------------------------------------------- |
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* |
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* Tk_GetSelection -- |
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* |
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* Retrieve the value of a selection and pass it off (in |
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* pieces, possibly) to a given procedure. |
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* |
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* Results: |
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* The return value is a standard Tcl return value. |
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* If an error occurs (such as no selection exists) |
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* then an error message is left in the interp's result. |
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* |
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* Side effects: |
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* The standard X11 protocols are used to retrieve the |
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* selection. When it arrives, it is passed to proc. If |
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* the selection is very large, it will be passed to proc |
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* in several pieces. Proc should have the following |
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* structure: |
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* |
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* int |
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* proc(clientData, interp, portion) |
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* ClientData clientData; |
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* Tcl_Interp *interp; |
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* char *portion; |
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* { |
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* } |
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* |
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* The interp and clientData arguments to proc will be the |
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* same as the corresponding arguments to Tk_GetSelection. |
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* The portion argument points to a character string |
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* containing part of the selection, and numBytes indicates |
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* the length of the portion, not including the terminating |
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* NULL character. If the selection arrives in several pieces, |
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* the "portion" arguments in separate calls will contain |
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* successive parts of the selection. Proc should normally |
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* return TCL_OK. If it detects an error then it should return |
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* TCL_ERROR and leave an error message in the interp's result; the |
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* remainder of the selection retrieval will be aborted. |
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* |
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*-------------------------------------------------------------- |
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*/ |
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int |
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Tk_GetSelection(interp, tkwin, selection, target, proc, clientData) |
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Tcl_Interp *interp; /* Interpreter to use for reporting |
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* errors. */ |
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Tk_Window tkwin; /* Window on whose behalf to retrieve |
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* the selection (determines display |
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* from which to retrieve). */ |
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Atom selection; /* Selection to retrieve. */ |
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Atom target; /* Desired form in which selection |
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* is to be returned. */ |
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Tk_GetSelProc *proc; /* Procedure to call to process the |
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* selection, once it has been retrieved. */ |
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ClientData clientData; /* Arbitrary value to pass to proc. */ |
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{ |
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TkWindow *winPtr = (TkWindow *) tkwin; |
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TkDisplay *dispPtr = winPtr->dispPtr; |
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TkSelectionInfo *infoPtr; |
|
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
|
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
|
|
|
|
|
if (dispPtr->multipleAtom == None) { |
|
|
TkSelInit(tkwin); |
|
|
} |
|
|
|
|
|
/* |
|
|
* If the selection is owned by a window managed by this |
|
|
* process, then call the retrieval procedure directly, |
|
|
* rather than going through the X server (it's dangerous |
|
|
* to go through the X server in this case because it could |
|
|
* result in deadlock if an INCR-style selection results). |
|
|
*/ |
|
|
|
|
|
for (infoPtr = dispPtr->selectionInfoPtr; infoPtr != NULL; |
|
|
infoPtr = infoPtr->nextPtr) { |
|
|
if (infoPtr->selection == selection) |
|
|
break; |
|
|
} |
|
|
if (infoPtr != NULL) { |
|
|
register TkSelHandler *selPtr; |
|
|
int offset, result, count; |
|
|
char buffer[TK_SEL_BYTES_AT_ONCE+1]; |
|
|
TkSelInProgress ip; |
|
|
|
|
|
for (selPtr = ((TkWindow *) infoPtr->owner)->selHandlerList; |
|
|
selPtr != NULL; selPtr = selPtr->nextPtr) { |
|
|
if ((selPtr->target == target) |
|
|
&& (selPtr->selection == selection)) { |
|
|
break; |
|
|
} |
|
|
} |
|
|
if (selPtr == NULL) { |
|
|
Atom type; |
|
|
|
|
|
count = TkSelDefaultSelection(infoPtr, target, buffer, |
|
|
TK_SEL_BYTES_AT_ONCE, &type); |
|
|
if (count > TK_SEL_BYTES_AT_ONCE) { |
|
|
panic("selection handler returned too many bytes"); |
|
|
} |
|
|
if (count < 0) { |
|
|
goto cantget; |
|
|
} |
|
|
buffer[count] = 0; |
|
|
result = (*proc)(clientData, interp, buffer); |
|
|
} else { |
|
|
offset = 0; |
|
|
result = TCL_OK; |
|
|
ip.selPtr = selPtr; |
|
|
ip.nextPtr = tsdPtr->pendingPtr; |
|
|
tsdPtr->pendingPtr = &ip; |
|
|
while (1) { |
|
|
count = (selPtr->proc)(selPtr->clientData, offset, buffer, |
|
|
TK_SEL_BYTES_AT_ONCE); |
|
|
if ((count < 0) || (ip.selPtr == NULL)) { |
|
|
tsdPtr->pendingPtr = ip.nextPtr; |
|
|
goto cantget; |
|
|
} |
|
|
if (count > TK_SEL_BYTES_AT_ONCE) { |
|
|
panic("selection handler returned too many bytes"); |
|
|
} |
|
|
buffer[count] = '\0'; |
|
|
result = (*proc)(clientData, interp, buffer); |
|
|
if ((result != TCL_OK) || (count < TK_SEL_BYTES_AT_ONCE) |
|
|
|| (ip.selPtr == NULL)) { |
|
|
break; |
|
|
} |
|
|
offset += count; |
|
|
} |
|
|
tsdPtr->pendingPtr = ip.nextPtr; |
|
|
} |
|
|
return result; |
|
|
} |
|
|
|
|
|
/* |
|
|
* The selection is owned by some other process. |
|
|
*/ |
|
|
|
|
|
return TkSelGetSelection(interp, tkwin, selection, target, proc, |
|
|
clientData); |
|
|
|
|
|
cantget: |
|
|
Tcl_AppendResult(interp, Tk_GetAtomName(tkwin, selection), |
|
|
" selection doesn't exist or form \"", Tk_GetAtomName(tkwin, target), |
|
|
"\" not defined", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* Tk_SelectionCmd -- |
|
|
* |
|
|
* This procedure is invoked to process the "selection" Tcl |
|
|
* command. See the user documentation for details on what |
|
|
* it does. |
|
|
* |
|
|
* Results: |
|
|
* A standard Tcl result. |
|
|
* |
|
|
* Side effects: |
|
|
* See the user documentation. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
Tk_SelectionCmd(clientData, interp, argc, argv) |
|
|
ClientData clientData; /* Main window associated with |
|
|
* interpreter. */ |
|
|
Tcl_Interp *interp; /* Current interpreter. */ |
|
|
int argc; /* Number of arguments. */ |
|
|
char **argv; /* Argument strings. */ |
|
|
{ |
|
|
Tk_Window tkwin = (Tk_Window) clientData; |
|
|
char *path = NULL; |
|
|
Atom selection; |
|
|
char *selName = NULL; |
|
|
int c, count; |
|
|
size_t length; |
|
|
char **args; |
|
|
|
|
|
if (argc < 2) { |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
|
|
" option ?arg arg ...?\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
c = argv[1][0]; |
|
|
length = strlen(argv[1]); |
|
|
if ((c == 'c') && (strncmp(argv[1], "clear", length) == 0)) { |
|
|
for (count = argc-2, args = argv+2; count > 0; count -= 2, args += 2) { |
|
|
if (args[0][0] != '-') { |
|
|
break; |
|
|
} |
|
|
if (count < 2) { |
|
|
Tcl_AppendResult(interp, "value for \"", *args, |
|
|
"\" missing", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
c = args[0][1]; |
|
|
length = strlen(args[0]); |
|
|
if ((c == 'd') && (strncmp(args[0], "-displayof", length) == 0)) { |
|
|
path = args[1]; |
|
|
} else if ((c == 's') |
|
|
&& (strncmp(args[0], "-selection", length) == 0)) { |
|
|
selName = args[1]; |
|
|
} else { |
|
|
Tcl_AppendResult(interp, "unknown option \"", args[0], |
|
|
"\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
if (count == 1) { |
|
|
path = args[0]; |
|
|
} else if (count > 1) { |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
|
|
" clear ?options?\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (path != NULL) { |
|
|
tkwin = Tk_NameToWindow(interp, path, tkwin); |
|
|
} |
|
|
if (tkwin == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (selName != NULL) { |
|
|
selection = Tk_InternAtom(tkwin, selName); |
|
|
} else { |
|
|
selection = XA_PRIMARY; |
|
|
} |
|
|
|
|
|
Tk_ClearSelection(tkwin, selection); |
|
|
return TCL_OK; |
|
|
} else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) { |
|
|
Atom target; |
|
|
char *targetName = NULL; |
|
|
Tcl_DString selBytes; |
|
|
int result; |
|
|
|
|
|
for (count = argc-2, args = argv+2; count > 0; count -= 2, args += 2) { |
|
|
if (args[0][0] != '-') { |
|
|
break; |
|
|
} |
|
|
if (count < 2) { |
|
|
Tcl_AppendResult(interp, "value for \"", *args, |
|
|
"\" missing", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
c = args[0][1]; |
|
|
length = strlen(args[0]); |
|
|
if ((c == 'd') && (strncmp(args[0], "-displayof", length) == 0)) { |
|
|
path = args[1]; |
|
|
} else if ((c == 's') |
|
|
&& (strncmp(args[0], "-selection", length) == 0)) { |
|
|
selName = args[1]; |
|
|
} else if ((c == 't') |
|
|
&& (strncmp(args[0], "-type", length) == 0)) { |
|
|
targetName = args[1]; |
|
|
} else { |
|
|
Tcl_AppendResult(interp, "unknown option \"", args[0], |
|
|
"\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
if (path != NULL) { |
|
|
tkwin = Tk_NameToWindow(interp, path, tkwin); |
|
|
} |
|
|
if (tkwin == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (selName != NULL) { |
|
|
selection = Tk_InternAtom(tkwin, selName); |
|
|
} else { |
|
|
selection = XA_PRIMARY; |
|
|
} |
|
|
if (count > 1) { |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
|
|
" get ?options?\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} else if (count == 1) { |
|
|
target = Tk_InternAtom(tkwin, args[0]); |
|
|
} else if (targetName != NULL) { |
|
|
target = Tk_InternAtom(tkwin, targetName); |
|
|
} else { |
|
|
target = XA_STRING; |
|
|
} |
|
|
|
|
|
Tcl_DStringInit(&selBytes); |
|
|
result = Tk_GetSelection(interp, tkwin, selection, target, SelGetProc, |
|
|
(ClientData) &selBytes); |
|
|
if (result == TCL_OK) { |
|
|
Tcl_DStringResult(interp, &selBytes); |
|
|
} else { |
|
|
Tcl_DStringFree(&selBytes); |
|
|
} |
|
|
return result; |
|
|
} else if ((c == 'h') && (strncmp(argv[1], "handle", length) == 0)) { |
|
|
Atom target, format; |
|
|
char *targetName = NULL; |
|
|
char *formatName = NULL; |
|
|
register CommandInfo *cmdInfoPtr; |
|
|
int cmdLength; |
|
|
|
|
|
for (count = argc-2, args = argv+2; count > 0; count -= 2, args += 2) { |
|
|
if (args[0][0] != '-') { |
|
|
break; |
|
|
} |
|
|
if (count < 2) { |
|
|
Tcl_AppendResult(interp, "value for \"", *args, |
|
|
"\" missing", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
c = args[0][1]; |
|
|
length = strlen(args[0]); |
|
|
if ((c == 'f') && (strncmp(args[0], "-format", length) == 0)) { |
|
|
formatName = args[1]; |
|
|
} else if ((c == 's') |
|
|
&& (strncmp(args[0], "-selection", length) == 0)) { |
|
|
selName = args[1]; |
|
|
} else if ((c == 't') |
|
|
&& (strncmp(args[0], "-type", length) == 0)) { |
|
|
targetName = args[1]; |
|
|
} else { |
|
|
Tcl_AppendResult(interp, "unknown option \"", args[0], |
|
|
"\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
if ((count < 2) || (count > 4)) { |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
|
|
" handle ?options? window command\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
tkwin = Tk_NameToWindow(interp, args[0], tkwin); |
|
|
if (tkwin == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (selName != NULL) { |
|
|
selection = Tk_InternAtom(tkwin, selName); |
|
|
} else { |
|
|
selection = XA_PRIMARY; |
|
|
} |
|
|
|
|
|
if (count > 2) { |
|
|
target = Tk_InternAtom(tkwin, args[2]); |
|
|
} else if (targetName != NULL) { |
|
|
target = Tk_InternAtom(tkwin, targetName); |
|
|
} else { |
|
|
target = XA_STRING; |
|
|
} |
|
|
if (count > 3) { |
|
|
format = Tk_InternAtom(tkwin, args[3]); |
|
|
} else if (formatName != NULL) { |
|
|
format = Tk_InternAtom(tkwin, formatName); |
|
|
} else { |
|
|
format = XA_STRING; |
|
|
} |
|
|
cmdLength = strlen(args[1]); |
|
|
if (cmdLength == 0) { |
|
|
Tk_DeleteSelHandler(tkwin, selection, target); |
|
|
} else { |
|
|
cmdInfoPtr = (CommandInfo *) ckalloc((unsigned) ( |
|
|
sizeof(CommandInfo) - 3 + cmdLength)); |
|
|
cmdInfoPtr->interp = interp; |
|
|
cmdInfoPtr->charOffset = 0; |
|
|
cmdInfoPtr->byteOffset = 0; |
|
|
cmdInfoPtr->buffer[0] = '\0'; |
|
|
cmdInfoPtr->cmdLength = cmdLength; |
|
|
strcpy(cmdInfoPtr->command, args[1]); |
|
|
Tk_CreateSelHandler(tkwin, selection, target, HandleTclCommand, |
|
|
(ClientData) cmdInfoPtr, format); |
|
|
} |
|
|
return TCL_OK; |
|
|
} else if ((c == 'o') && (strncmp(argv[1], "own", length) == 0)) { |
|
|
register LostCommand *lostPtr; |
|
|
char *script = NULL; |
|
|
int cmdLength; |
|
|
|
|
|
for (count = argc-2, args = argv+2; count > 0; count -= 2, args += 2) { |
|
|
if (args[0][0] != '-') { |
|
|
break; |
|
|
} |
|
|
if (count < 2) { |
|
|
Tcl_AppendResult(interp, "value for \"", *args, |
|
|
"\" missing", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
c = args[0][1]; |
|
|
length = strlen(args[0]); |
|
|
if ((c == 'c') && (strncmp(args[0], "-command", length) == 0)) { |
|
|
script = args[1]; |
|
|
} else if ((c == 'd') |
|
|
&& (strncmp(args[0], "-displayof", length) == 0)) { |
|
|
path = args[1]; |
|
|
} else if ((c == 's') |
|
|
&& (strncmp(args[0], "-selection", length) == 0)) { |
|
|
selName = args[1]; |
|
|
} else { |
|
|
Tcl_AppendResult(interp, "unknown option \"", args[0], |
|
|
"\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
if (count > 2) { |
|
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
|
|
" own ?options? ?window?\"", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (selName != NULL) { |
|
|
selection = Tk_InternAtom(tkwin, selName); |
|
|
} else { |
|
|
selection = XA_PRIMARY; |
|
|
} |
|
|
if (count == 0) { |
|
|
TkSelectionInfo *infoPtr; |
|
|
TkWindow *winPtr; |
|
|
if (path != NULL) { |
|
|
tkwin = Tk_NameToWindow(interp, path, tkwin); |
|
|
} |
|
|
if (tkwin == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
winPtr = (TkWindow *)tkwin; |
|
|
for (infoPtr = winPtr->dispPtr->selectionInfoPtr; infoPtr != NULL; |
|
|
infoPtr = infoPtr->nextPtr) { |
|
|
if (infoPtr->selection == selection) |
|
|
break; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Ignore the internal clipboard window. |
|
|
*/ |
|
|
|
|
|
if ((infoPtr != NULL) |
|
|
&& (infoPtr->owner != winPtr->dispPtr->clipWindow)) { |
|
|
Tcl_SetResult(interp, Tk_PathName(infoPtr->owner), TCL_STATIC); |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
tkwin = Tk_NameToWindow(interp, args[0], tkwin); |
|
|
if (tkwin == NULL) { |
|
|
return TCL_ERROR; |
|
|
} |
|
|
if (count == 2) { |
|
|
script = args[1]; |
|
|
} |
|
|
if (script == NULL) { |
|
|
Tk_OwnSelection(tkwin, selection, (Tk_LostSelProc *) NULL, |
|
|
(ClientData) NULL); |
|
|
return TCL_OK; |
|
|
} |
|
|
cmdLength = strlen(script); |
|
|
lostPtr = (LostCommand *) ckalloc((unsigned) (sizeof(LostCommand) |
|
|
-3 + cmdLength)); |
|
|
lostPtr->interp = interp; |
|
|
strcpy(lostPtr->command, script); |
|
|
Tk_OwnSelection(tkwin, selection, LostSelection, (ClientData) lostPtr); |
|
|
return TCL_OK; |
|
|
} else { |
|
|
Tcl_AppendResult(interp, "bad option \"", argv[1], |
|
|
"\": must be clear, get, handle, or own", (char *) NULL); |
|
|
return TCL_ERROR; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkSelGetInProgress -- |
|
|
* |
|
|
* This procedure returns a pointer to the thread-local |
|
|
* list of pending searches. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a pointer to the first search in progress, |
|
|
* or NULL if there are none. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
TkSelInProgress * |
|
|
TkSelGetInProgress _ANSI_ARGS_((void)) |
|
|
{ |
|
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
|
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
|
|
|
|
|
return tsdPtr->pendingPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkSelSetInProgress -- |
|
|
* |
|
|
* This procedure is used to set the thread-local list of pending |
|
|
* searches. It is required because the pending list is kept |
|
|
* in thread local storage. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
void |
|
|
TkSelSetInProgress(pendingPtr) |
|
|
TkSelInProgress *pendingPtr; |
|
|
{ |
|
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
|
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
|
|
|
|
|
tsdPtr->pendingPtr = pendingPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkSelDeadWindow -- |
|
|
* |
|
|
* This procedure is invoked just before a TkWindow is deleted. |
|
|
* It performs selection-related cleanup. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Frees up memory associated with the selection. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkSelDeadWindow(winPtr) |
|
|
register TkWindow *winPtr; /* Window that's being deleted. */ |
|
|
{ |
|
|
register TkSelHandler *selPtr; |
|
|
register TkSelInProgress *ipPtr; |
|
|
TkSelectionInfo *infoPtr, *prevPtr, *nextPtr; |
|
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
|
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
|
|
|
|
|
/* |
|
|
* While deleting all the handlers, be careful to check whether |
|
|
* ConvertSelection or TkSelPropProc are about to process one of the |
|
|
* deleted handlers. |
|
|
*/ |
|
|
|
|
|
while (winPtr->selHandlerList != NULL) { |
|
|
selPtr = winPtr->selHandlerList; |
|
|
winPtr->selHandlerList = selPtr->nextPtr; |
|
|
for (ipPtr = tsdPtr->pendingPtr; ipPtr != NULL; |
|
|
ipPtr = ipPtr->nextPtr) { |
|
|
if (ipPtr->selPtr == selPtr) { |
|
|
ipPtr->selPtr = NULL; |
|
|
} |
|
|
} |
|
|
if (selPtr->proc == HandleTclCommand) { |
|
|
/* |
|
|
* Mark the CommandInfo as deleted and free it if we can. |
|
|
*/ |
|
|
|
|
|
((CommandInfo*)selPtr->clientData)->interp = NULL; |
|
|
Tcl_EventuallyFree(selPtr->clientData, Tcl_Free); |
|
|
} |
|
|
ckfree((char *) selPtr); |
|
|
} |
|
|
|
|
|
/* |
|
|
* Remove selections owned by window being deleted. |
|
|
*/ |
|
|
|
|
|
for (infoPtr = winPtr->dispPtr->selectionInfoPtr, prevPtr = NULL; |
|
|
infoPtr != NULL; infoPtr = nextPtr) { |
|
|
nextPtr = infoPtr->nextPtr; |
|
|
if (infoPtr->owner == (Tk_Window) winPtr) { |
|
|
if (infoPtr->clearProc == LostSelection) { |
|
|
ckfree((char *) infoPtr->clearData); |
|
|
} |
|
|
ckfree((char *) infoPtr); |
|
|
infoPtr = prevPtr; |
|
|
if (prevPtr == NULL) { |
|
|
winPtr->dispPtr->selectionInfoPtr = nextPtr; |
|
|
} else { |
|
|
prevPtr->nextPtr = nextPtr; |
|
|
} |
|
|
} |
|
|
prevPtr = infoPtr; |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkSelInit -- |
|
|
* |
|
|
* Initialize selection-related information for a display. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Selection-related information is initialized. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkSelInit(tkwin) |
|
|
Tk_Window tkwin; /* Window token (used to find |
|
|
* display to initialize). */ |
|
|
{ |
|
|
register TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr; |
|
|
|
|
|
/* |
|
|
* Fetch commonly-used atoms. |
|
|
*/ |
|
|
|
|
|
dispPtr->multipleAtom = Tk_InternAtom(tkwin, "MULTIPLE"); |
|
|
dispPtr->incrAtom = Tk_InternAtom(tkwin, "INCR"); |
|
|
dispPtr->targetsAtom = Tk_InternAtom(tkwin, "TARGETS"); |
|
|
dispPtr->timestampAtom = Tk_InternAtom(tkwin, "TIMESTAMP"); |
|
|
dispPtr->textAtom = Tk_InternAtom(tkwin, "TEXT"); |
|
|
dispPtr->compoundTextAtom = Tk_InternAtom(tkwin, "COMPOUND_TEXT"); |
|
|
dispPtr->applicationAtom = Tk_InternAtom(tkwin, "TK_APPLICATION"); |
|
|
dispPtr->windowAtom = Tk_InternAtom(tkwin, "TK_WINDOW"); |
|
|
dispPtr->clipboardAtom = Tk_InternAtom(tkwin, "CLIPBOARD"); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkSelClearSelection -- |
|
|
* |
|
|
* This procedure is invoked to process a SelectionClear event. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Invokes the clear procedure for the window which lost the |
|
|
* selection. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkSelClearSelection(tkwin, eventPtr) |
|
|
Tk_Window tkwin; /* Window for which event was targeted. */ |
|
|
register XEvent *eventPtr; /* X SelectionClear event. */ |
|
|
{ |
|
|
register TkWindow *winPtr = (TkWindow *) tkwin; |
|
|
TkDisplay *dispPtr = winPtr->dispPtr; |
|
|
TkSelectionInfo *infoPtr; |
|
|
TkSelectionInfo *prevPtr; |
|
|
|
|
|
/* |
|
|
* Invoke clear procedure for window that just lost the selection. This |
|
|
* code is a bit tricky, because any callbacks due to selection changes |
|
|
* between windows managed by the process have already been made. Thus, |
|
|
* ignore the event unless it refers to the window that's currently the |
|
|
* selection owner and the event was generated after the server saw the |
|
|
* SetSelectionOwner request. |
|
|
*/ |
|
|
|
|
|
for (infoPtr = dispPtr->selectionInfoPtr, prevPtr = NULL; |
|
|
infoPtr != NULL; infoPtr = infoPtr->nextPtr) { |
|
|
if (infoPtr->selection == eventPtr->xselectionclear.selection) { |
|
|
break; |
|
|
} |
|
|
prevPtr = infoPtr; |
|
|
} |
|
|
|
|
|
if (infoPtr != NULL && (infoPtr->owner == tkwin) |
|
|
&& (eventPtr->xselectionclear.serial >= (unsigned) infoPtr->serial)) { |
|
|
if (prevPtr == NULL) { |
|
|
dispPtr->selectionInfoPtr = infoPtr->nextPtr; |
|
|
} else { |
|
|
prevPtr->nextPtr = infoPtr->nextPtr; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Because of reentrancy problems, calling clearProc must be done |
|
|
* after the infoPtr has been removed from the selectionInfoPtr |
|
|
* list (clearProc could modify the list, e.g. by creating |
|
|
* a new selection). |
|
|
*/ |
|
|
|
|
|
if (infoPtr->clearProc != NULL) { |
|
|
(*infoPtr->clearProc)(infoPtr->clearData); |
|
|
} |
|
|
ckfree((char *) infoPtr); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* SelGetProc -- |
|
|
* |
|
|
* This procedure is invoked to process pieces of the selection |
|
|
* as they arrive during "selection get" commands. |
|
|
* |
|
|
* Results: |
|
|
* Always returns TCL_OK. |
|
|
* |
|
|
* Side effects: |
|
|
* Bytes get appended to the dynamic string pointed to by the |
|
|
* clientData argument. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
/* ARGSUSED */ |
|
|
static int |
|
|
SelGetProc(clientData, interp, portion) |
|
|
ClientData clientData; /* Dynamic string holding partially |
|
|
* assembled selection. */ |
|
|
Tcl_Interp *interp; /* Interpreter used for error |
|
|
* reporting (not used). */ |
|
|
char *portion; /* New information to be appended. */ |
|
|
{ |
|
|
Tcl_DStringAppend((Tcl_DString *) clientData, portion, -1); |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* HandleTclCommand -- |
|
|
* |
|
|
* This procedure acts as selection handler for handlers created |
|
|
* by the "selection handle" command. It invokes a Tcl command to |
|
|
* retrieve the selection. |
|
|
* |
|
|
* Results: |
|
|
* The return value is a count of the number of bytes actually |
|
|
* stored at buffer, or -1 if an error occurs while executing |
|
|
* the Tcl command to retrieve the selection. |
|
|
* |
|
|
* Side effects: |
|
|
* None except for things done by the Tcl command. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
HandleTclCommand(clientData, offset, buffer, maxBytes) |
|
|
ClientData clientData; /* Information about command to execute. */ |
|
|
int offset; /* Return selection bytes starting at this |
|
|
* offset. */ |
|
|
char *buffer; /* Place to store converted selection. */ |
|
|
int maxBytes; /* Maximum # of bytes to store at buffer. */ |
|
|
{ |
|
|
CommandInfo *cmdInfoPtr = (CommandInfo *) clientData; |
|
|
int spaceNeeded, length; |
|
|
#define MAX_STATIC_SIZE 100 |
|
|
char staticSpace[MAX_STATIC_SIZE]; |
|
|
char *command, *string; |
|
|
Tcl_Interp *interp = cmdInfoPtr->interp; |
|
|
Tcl_DString oldResult; |
|
|
Tcl_Obj *objPtr; |
|
|
int extraBytes, charOffset, count, numChars; |
|
|
char *p; |
|
|
|
|
|
/* |
|
|
* We must also protect the interpreter and the command from being |
|
|
* deleted too soon. |
|
|
*/ |
|
|
|
|
|
Tcl_Preserve(clientData); |
|
|
Tcl_Preserve((ClientData) interp); |
|
|
|
|
|
/* |
|
|
* Compute the proper byte offset in the case where the last chunk |
|
|
* split a character. |
|
|
*/ |
|
|
|
|
|
if (offset == cmdInfoPtr->byteOffset) { |
|
|
charOffset = cmdInfoPtr->charOffset; |
|
|
extraBytes = strlen(cmdInfoPtr->buffer); |
|
|
if (extraBytes > 0) { |
|
|
strcpy(buffer, cmdInfoPtr->buffer); |
|
|
maxBytes -= extraBytes; |
|
|
buffer += extraBytes; |
|
|
} |
|
|
} else { |
|
|
cmdInfoPtr->byteOffset = 0; |
|
|
cmdInfoPtr->charOffset = 0; |
|
|
extraBytes = 0; |
|
|
charOffset = 0; |
|
|
} |
|
|
|
|
|
/* |
|
|
* First, generate a command by taking the command string |
|
|
* and appending the offset and maximum # of bytes. |
|
|
*/ |
|
|
|
|
|
spaceNeeded = cmdInfoPtr->cmdLength + 30; |
|
|
if (spaceNeeded < MAX_STATIC_SIZE) { |
|
|
command = staticSpace; |
|
|
} else { |
|
|
command = (char *) ckalloc((unsigned) spaceNeeded); |
|
|
} |
|
|
sprintf(command, "%s %d %d", cmdInfoPtr->command, charOffset, maxBytes); |
|
|
|
|
|
/* |
|
|
* Execute the command. Be sure to restore the state of the |
|
|
* interpreter after executing the command. |
|
|
*/ |
|
|
|
|
|
Tcl_DStringInit(&oldResult); |
|
|
Tcl_DStringGetResult(interp, &oldResult); |
|
|
if (TkCopyAndGlobalEval(interp, command) == TCL_OK) { |
|
|
objPtr = Tcl_GetObjResult(interp); |
|
|
string = Tcl_GetStringFromObj(objPtr, &length); |
|
|
count = (length > maxBytes) ? maxBytes : length; |
|
|
memcpy((VOID *) buffer, (VOID *) string, (size_t) count); |
|
|
buffer[count] = '\0'; |
|
|
|
|
|
/* |
|
|
* Update the partial character information for the next |
|
|
* retrieval if the command has not been deleted. |
|
|
*/ |
|
|
|
|
|
if (cmdInfoPtr->interp != NULL) { |
|
|
if (length <= maxBytes) { |
|
|
cmdInfoPtr->charOffset += Tcl_NumUtfChars(string, -1); |
|
|
cmdInfoPtr->buffer[0] = '\0'; |
|
|
} else { |
|
|
p = string; |
|
|
string += count; |
|
|
numChars = 0; |
|
|
while (p < string) { |
|
|
p = Tcl_UtfNext(p); |
|
|
numChars++; |
|
|
} |
|
|
cmdInfoPtr->charOffset += numChars; |
|
|
length = p - string; |
|
|
if (length > 0) { |
|
|
strncpy(cmdInfoPtr->buffer, string, (size_t) length); |
|
|
} |
|
|
cmdInfoPtr->buffer[length] = '\0'; |
|
|
} |
|
|
cmdInfoPtr->byteOffset += count + extraBytes; |
|
|
} |
|
|
count += extraBytes; |
|
|
} else { |
|
|
count = -1; |
|
|
} |
|
|
Tcl_DStringResult(interp, &oldResult); |
|
|
|
|
|
if (command != staticSpace) { |
|
|
ckfree(command); |
|
|
} |
|
|
|
|
|
|
|
|
Tcl_Release(clientData); |
|
|
Tcl_Release((ClientData) interp); |
|
|
return count; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkSelDefaultSelection -- |
|
|
* |
|
|
* This procedure is called to generate selection information |
|
|
* for a few standard targets such as TIMESTAMP and TARGETS. |
|
|
* It is invoked only if no handler has been declared by the |
|
|
* application. |
|
|
* |
|
|
* Results: |
|
|
* If "target" is a standard target understood by this procedure, |
|
|
* the selection is converted to that form and stored as a |
|
|
* character string in buffer. The type of the selection (e.g. |
|
|
* STRING or ATOM) is stored in *typePtr, and the return value is |
|
|
* a count of the # of non-NULL bytes at buffer. If the target |
|
|
* wasn't understood, or if there isn't enough space at buffer |
|
|
* to hold the entire selection (no INCR-mode transfers for this |
|
|
* stuff!), then -1 is returned. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
TkSelDefaultSelection(infoPtr, target, buffer, maxBytes, typePtr) |
|
|
TkSelectionInfo *infoPtr; /* Info about selection being retrieved. */ |
|
|
Atom target; /* Desired form of selection. */ |
|
|
char *buffer; /* Place to put selection characters. */ |
|
|
int maxBytes; /* Maximum # of bytes to store at buffer. */ |
|
|
Atom *typePtr; /* Store here the type of the selection, |
|
|
* for use in converting to proper X format. */ |
|
|
{ |
|
|
register TkWindow *winPtr = (TkWindow *) infoPtr->owner; |
|
|
TkDisplay *dispPtr = winPtr->dispPtr; |
|
|
|
|
|
if (target == dispPtr->timestampAtom) { |
|
|
if (maxBytes < 20) { |
|
|
return -1; |
|
|
} |
|
|
sprintf(buffer, "0x%x", (unsigned int) infoPtr->time); |
|
|
*typePtr = XA_INTEGER; |
|
|
return strlen(buffer); |
|
|
} |
|
|
|
|
|
if (target == dispPtr->targetsAtom) { |
|
|
register TkSelHandler *selPtr; |
|
|
char *atomString; |
|
|
int length, atomLength; |
|
|
|
|
|
if (maxBytes < 50) { |
|
|
return -1; |
|
|
} |
|
|
strcpy(buffer, "MULTIPLE TARGETS TIMESTAMP TK_APPLICATION TK_WINDOW"); |
|
|
length = strlen(buffer); |
|
|
for (selPtr = winPtr->selHandlerList; selPtr != NULL; |
|
|
selPtr = selPtr->nextPtr) { |
|
|
if ((selPtr->selection == infoPtr->selection) |
|
|
&& (selPtr->target != dispPtr->applicationAtom) |
|
|
&& (selPtr->target != dispPtr->windowAtom)) { |
|
|
atomString = Tk_GetAtomName((Tk_Window) winPtr, |
|
|
selPtr->target); |
|
|
atomLength = strlen(atomString) + 1; |
|
|
if ((length + atomLength) >= maxBytes) { |
|
|
return -1; |
|
|
} |
|
|
sprintf(buffer+length, " %s", atomString); |
|
|
length += atomLength; |
|
|
} |
|
|
} |
|
|
*typePtr = XA_ATOM; |
|
|
return length; |
|
|
} |
|
|
|
|
|
if (target == dispPtr->applicationAtom) { |
|
|
int length; |
|
|
char *name = winPtr->mainPtr->winPtr->nameUid; |
|
|
|
|
|
length = strlen(name); |
|
|
if (maxBytes <= length) { |
|
|
return -1; |
|
|
} |
|
|
strcpy(buffer, name); |
|
|
*typePtr = XA_STRING; |
|
|
return length; |
|
|
} |
|
|
|
|
|
if (target == dispPtr->windowAtom) { |
|
|
int length; |
|
|
char *name = winPtr->pathName; |
|
|
|
|
|
length = strlen(name); |
|
|
if (maxBytes <= length) { |
|
|
return -1; |
|
|
} |
|
|
strcpy(buffer, name); |
|
|
*typePtr = XA_STRING; |
|
|
return length; |
|
|
} |
|
|
|
|
|
return -1; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* LostSelection -- |
|
|
* |
|
|
* This procedure is invoked when a window has lost ownership of |
|
|
* the selection and the ownership was claimed with the command |
|
|
* "selection own". |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* A Tcl script is executed; it can do almost anything. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
LostSelection(clientData) |
|
|
ClientData clientData; /* Pointer to LostCommand structure. */ |
|
|
{ |
|
|
LostCommand *lostPtr = (LostCommand *) clientData; |
|
|
Tcl_Obj *objPtr; |
|
|
Tcl_Interp *interp; |
|
|
|
|
|
interp = lostPtr->interp; |
|
|
Tcl_Preserve((ClientData) interp); |
|
|
|
|
|
/* |
|
|
* Execute the command. Save the interpreter's result, if any, and |
|
|
* restore it after executing the command. |
|
|
*/ |
|
|
|
|
|
objPtr = Tcl_GetObjResult(interp); |
|
|
Tcl_IncrRefCount(objPtr); |
|
|
Tcl_ResetResult(interp); |
|
|
|
|
|
if (TkCopyAndGlobalEval(interp, lostPtr->command) != TCL_OK) { |
|
|
Tcl_BackgroundError(interp); |
|
|
} |
|
|
|
|
|
Tcl_SetObjResult(interp, objPtr); |
|
|
Tcl_DecrRefCount(objPtr); |
|
|
|
|
|
Tcl_Release((ClientData) interp); |
|
|
|
|
|
/* |
|
|
* Free the storage for the command, since we're done with it now. |
|
|
*/ |
|
|
|
|
|
ckfree((char *) lostPtr); |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkSelect.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 3:01a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKSELECT.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
|
| 3 |
|
/* |
| 4 |
|
* tkSelect.c -- |
| 5 |
|
* |
| 6 |
|
* This file manages the selection for the Tk toolkit, |
| 7 |
|
* translating between the standard X ICCCM conventions |
| 8 |
|
* and Tcl commands. |
| 9 |
|
* |
| 10 |
|
* Copyright (c) 1990-1993 The Regents of the University of California. |
| 11 |
|
* Copyright (c) 1994-1997 Sun Microsystems, Inc. |
| 12 |
|
* |
| 13 |
|
* See the file "license.terms" for information on usage and redistribution |
| 14 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 15 |
|
* |
| 16 |
|
* RCS: @(#) $Id: tkselect.c,v 1.1.1.1 2001/06/13 05:08:09 dtashley Exp $ |
| 17 |
|
*/ |
| 18 |
|
|
| 19 |
|
#include "tkInt.h" |
| 20 |
|
#include "tkSelect.h" |
| 21 |
|
|
| 22 |
|
/* |
| 23 |
|
* When a selection handler is set up by invoking "selection handle", |
| 24 |
|
* one of the following data structures is set up to hold information |
| 25 |
|
* about the command to invoke and its interpreter. |
| 26 |
|
*/ |
| 27 |
|
|
| 28 |
|
typedef struct { |
| 29 |
|
Tcl_Interp *interp; /* Interpreter in which to invoke command. */ |
| 30 |
|
int cmdLength; /* # of non-NULL bytes in command. */ |
| 31 |
|
int charOffset; /* The offset of the next char to retrieve. */ |
| 32 |
|
int byteOffset; /* The expected byte offset of the next |
| 33 |
|
* chunk. */ |
| 34 |
|
char buffer[TCL_UTF_MAX]; /* A buffer to hold part of a UTF character |
| 35 |
|
* that is split across chunks.*/ |
| 36 |
|
char command[4]; /* Command to invoke. Actual space is |
| 37 |
|
* allocated as large as necessary. This |
| 38 |
|
* must be the last entry in the structure. */ |
| 39 |
|
} CommandInfo; |
| 40 |
|
|
| 41 |
|
/* |
| 42 |
|
* When selection ownership is claimed with the "selection own" Tcl command, |
| 43 |
|
* one of the following structures is created to record the Tcl command |
| 44 |
|
* to be executed when the selection is lost again. |
| 45 |
|
*/ |
| 46 |
|
|
| 47 |
|
typedef struct LostCommand { |
| 48 |
|
Tcl_Interp *interp; /* Interpreter in which to invoke command. */ |
| 49 |
|
char command[4]; /* Command to invoke. Actual space is |
| 50 |
|
* allocated as large as necessary. This |
| 51 |
|
* must be the last entry in the structure. */ |
| 52 |
|
} LostCommand; |
| 53 |
|
|
| 54 |
|
/* |
| 55 |
|
* The structure below is used to keep each thread's pending list |
| 56 |
|
* separate. |
| 57 |
|
*/ |
| 58 |
|
|
| 59 |
|
typedef struct ThreadSpecificData { |
| 60 |
|
TkSelInProgress *pendingPtr; |
| 61 |
|
/* Topmost search in progress, or |
| 62 |
|
* NULL if none. */ |
| 63 |
|
} ThreadSpecificData; |
| 64 |
|
static Tcl_ThreadDataKey dataKey; |
| 65 |
|
|
| 66 |
|
/* |
| 67 |
|
* Forward declarations for procedures defined in this file: |
| 68 |
|
*/ |
| 69 |
|
|
| 70 |
|
static int HandleTclCommand _ANSI_ARGS_((ClientData clientData, |
| 71 |
|
int offset, char *buffer, int maxBytes)); |
| 72 |
|
static void LostSelection _ANSI_ARGS_((ClientData clientData)); |
| 73 |
|
static int SelGetProc _ANSI_ARGS_((ClientData clientData, |
| 74 |
|
Tcl_Interp *interp, char *portion)); |
| 75 |
|
|
| 76 |
|
/* |
| 77 |
|
*-------------------------------------------------------------- |
| 78 |
|
* |
| 79 |
|
* Tk_CreateSelHandler -- |
| 80 |
|
* |
| 81 |
|
* This procedure is called to register a procedure |
| 82 |
|
* as the handler for selection requests of a particular |
| 83 |
|
* target type on a particular window for a particular |
| 84 |
|
* selection. |
| 85 |
|
* |
| 86 |
|
* Results: |
| 87 |
|
* None. |
| 88 |
|
* |
| 89 |
|
* Side effects: |
| 90 |
|
* In the future, whenever the selection is in tkwin's |
| 91 |
|
* window and someone requests the selection in the |
| 92 |
|
* form given by target, proc will be invoked to provide |
| 93 |
|
* part or all of the selection in the given form. If |
| 94 |
|
* there was already a handler declared for the given |
| 95 |
|
* window, target and selection type, then it is replaced. |
| 96 |
|
* Proc should have the following form: |
| 97 |
|
* |
| 98 |
|
* int |
| 99 |
|
* proc(clientData, offset, buffer, maxBytes) |
| 100 |
|
* ClientData clientData; |
| 101 |
|
* int offset; |
| 102 |
|
* char *buffer; |
| 103 |
|
* int maxBytes; |
| 104 |
|
* { |
| 105 |
|
* } |
| 106 |
|
* |
| 107 |
|
* The clientData argument to proc will be the same as |
| 108 |
|
* the clientData argument to this procedure. The offset |
| 109 |
|
* argument indicates which portion of the selection to |
| 110 |
|
* return: skip the first offset bytes. Buffer is a |
| 111 |
|
* pointer to an area in which to place the converted |
| 112 |
|
* selection, and maxBytes gives the number of bytes |
| 113 |
|
* available at buffer. Proc should place the selection |
| 114 |
|
* in buffer as a string, and return a count of the number |
| 115 |
|
* of bytes of selection actually placed in buffer (not |
| 116 |
|
* including the terminating NULL character). If the |
| 117 |
|
* return value equals maxBytes, this is a sign that there |
| 118 |
|
* is probably still more selection information available. |
| 119 |
|
* |
| 120 |
|
*-------------------------------------------------------------- |
| 121 |
|
*/ |
| 122 |
|
|
| 123 |
|
void |
| 124 |
|
Tk_CreateSelHandler(tkwin, selection, target, proc, clientData, format) |
| 125 |
|
Tk_Window tkwin; /* Token for window. */ |
| 126 |
|
Atom selection; /* Selection to be handled. */ |
| 127 |
|
Atom target; /* The kind of selection conversions |
| 128 |
|
* that can be handled by proc, |
| 129 |
|
* e.g. TARGETS or STRING. */ |
| 130 |
|
Tk_SelectionProc *proc; /* Procedure to invoke to convert |
| 131 |
|
* selection to type "target". */ |
| 132 |
|
ClientData clientData; /* Value to pass to proc. */ |
| 133 |
|
Atom format; /* Format in which the selection |
| 134 |
|
* information should be returned to |
| 135 |
|
* the requestor. XA_STRING is best by |
| 136 |
|
* far, but anything listed in the ICCCM |
| 137 |
|
* will be tolerated (blech). */ |
| 138 |
|
{ |
| 139 |
|
register TkSelHandler *selPtr; |
| 140 |
|
TkWindow *winPtr = (TkWindow *) tkwin; |
| 141 |
|
|
| 142 |
|
if (winPtr->dispPtr->multipleAtom == None) { |
| 143 |
|
TkSelInit(tkwin); |
| 144 |
|
} |
| 145 |
|
|
| 146 |
|
/* |
| 147 |
|
* See if there's already a handler for this target and selection on |
| 148 |
|
* this window. If so, re-use it. If not, create a new one. |
| 149 |
|
*/ |
| 150 |
|
|
| 151 |
|
for (selPtr = winPtr->selHandlerList; ; selPtr = selPtr->nextPtr) { |
| 152 |
|
if (selPtr == NULL) { |
| 153 |
|
selPtr = (TkSelHandler *) ckalloc(sizeof(TkSelHandler)); |
| 154 |
|
selPtr->nextPtr = winPtr->selHandlerList; |
| 155 |
|
winPtr->selHandlerList = selPtr; |
| 156 |
|
break; |
| 157 |
|
} |
| 158 |
|
if ((selPtr->selection == selection) && (selPtr->target == target)) { |
| 159 |
|
|
| 160 |
|
/* |
| 161 |
|
* Special case: when replacing handler created by |
| 162 |
|
* "selection handle", free up memory. Should there be a |
| 163 |
|
* callback to allow other clients to do this too? |
| 164 |
|
*/ |
| 165 |
|
|
| 166 |
|
if (selPtr->proc == HandleTclCommand) { |
| 167 |
|
ckfree((char *) selPtr->clientData); |
| 168 |
|
} |
| 169 |
|
break; |
| 170 |
|
} |
| 171 |
|
} |
| 172 |
|
selPtr->selection = selection; |
| 173 |
|
selPtr->target = target; |
| 174 |
|
selPtr->format = format; |
| 175 |
|
selPtr->proc = proc; |
| 176 |
|
selPtr->clientData = clientData; |
| 177 |
|
if (format == XA_STRING) { |
| 178 |
|
selPtr->size = 8; |
| 179 |
|
} else { |
| 180 |
|
selPtr->size = 32; |
| 181 |
|
} |
| 182 |
|
} |
| 183 |
|
|
| 184 |
|
/* |
| 185 |
|
*---------------------------------------------------------------------- |
| 186 |
|
* |
| 187 |
|
* Tk_DeleteSelHandler -- |
| 188 |
|
* |
| 189 |
|
* Remove the selection handler for a given window, target, and |
| 190 |
|
* selection, if it exists. |
| 191 |
|
* |
| 192 |
|
* Results: |
| 193 |
|
* None. |
| 194 |
|
* |
| 195 |
|
* Side effects: |
| 196 |
|
* The selection handler for tkwin and target is removed. If there |
| 197 |
|
* is no such handler then nothing happens. |
| 198 |
|
* |
| 199 |
|
*---------------------------------------------------------------------- |
| 200 |
|
*/ |
| 201 |
|
|
| 202 |
|
void |
| 203 |
|
Tk_DeleteSelHandler(tkwin, selection, target) |
| 204 |
|
Tk_Window tkwin; /* Token for window. */ |
| 205 |
|
Atom selection; /* The selection whose handler |
| 206 |
|
* is to be removed. */ |
| 207 |
|
Atom target; /* The target whose selection |
| 208 |
|
* handler is to be removed. */ |
| 209 |
|
{ |
| 210 |
|
TkWindow *winPtr = (TkWindow *) tkwin; |
| 211 |
|
register TkSelHandler *selPtr, *prevPtr; |
| 212 |
|
register TkSelInProgress *ipPtr; |
| 213 |
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 214 |
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 215 |
|
|
| 216 |
|
/* |
| 217 |
|
* Find the selection handler to be deleted, or return if it doesn't |
| 218 |
|
* exist. |
| 219 |
|
*/ |
| 220 |
|
|
| 221 |
|
for (selPtr = winPtr->selHandlerList, prevPtr = NULL; ; |
| 222 |
|
prevPtr = selPtr, selPtr = selPtr->nextPtr) { |
| 223 |
|
if (selPtr == NULL) { |
| 224 |
|
return; |
| 225 |
|
} |
| 226 |
|
if ((selPtr->selection == selection) && (selPtr->target == target)) { |
| 227 |
|
break; |
| 228 |
|
} |
| 229 |
|
} |
| 230 |
|
|
| 231 |
|
/* |
| 232 |
|
* If ConvertSelection is processing this handler, tell it that the |
| 233 |
|
* handler is dead. |
| 234 |
|
*/ |
| 235 |
|
|
| 236 |
|
for (ipPtr = tsdPtr->pendingPtr; ipPtr != NULL; |
| 237 |
|
ipPtr = ipPtr->nextPtr) { |
| 238 |
|
if (ipPtr->selPtr == selPtr) { |
| 239 |
|
ipPtr->selPtr = NULL; |
| 240 |
|
} |
| 241 |
|
} |
| 242 |
|
|
| 243 |
|
/* |
| 244 |
|
* Free resources associated with the handler. |
| 245 |
|
*/ |
| 246 |
|
|
| 247 |
|
if (prevPtr == NULL) { |
| 248 |
|
winPtr->selHandlerList = selPtr->nextPtr; |
| 249 |
|
} else { |
| 250 |
|
prevPtr->nextPtr = selPtr->nextPtr; |
| 251 |
|
} |
| 252 |
|
if (selPtr->proc == HandleTclCommand) { |
| 253 |
|
/* |
| 254 |
|
* Mark the CommandInfo as deleted and free it if we can. |
| 255 |
|
*/ |
| 256 |
|
|
| 257 |
|
((CommandInfo*)selPtr->clientData)->interp = NULL; |
| 258 |
|
Tcl_EventuallyFree(selPtr->clientData, Tcl_Free); |
| 259 |
|
} |
| 260 |
|
ckfree((char *) selPtr); |
| 261 |
|
} |
| 262 |
|
|
| 263 |
|
/* |
| 264 |
|
*-------------------------------------------------------------- |
| 265 |
|
* |
| 266 |
|
* Tk_OwnSelection -- |
| 267 |
|
* |
| 268 |
|
* Arrange for tkwin to become the owner of a selection. |
| 269 |
|
* |
| 270 |
|
* Results: |
| 271 |
|
* None. |
| 272 |
|
* |
| 273 |
|
* Side effects: |
| 274 |
|
* From now on, requests for the selection will be directed |
| 275 |
|
* to procedures associated with tkwin (they must have been |
| 276 |
|
* declared with calls to Tk_CreateSelHandler). When the |
| 277 |
|
* selection is lost by this window, proc will be invoked |
| 278 |
|
* (see the manual entry for details). This procedure may |
| 279 |
|
* invoke callbacks, including Tcl scripts, so any calling |
| 280 |
|
* function should be reentrant at the point where |
| 281 |
|
* Tk_OwnSelection is invoked. |
| 282 |
|
* |
| 283 |
|
*-------------------------------------------------------------- |
| 284 |
|
*/ |
| 285 |
|
|
| 286 |
|
void |
| 287 |
|
Tk_OwnSelection(tkwin, selection, proc, clientData) |
| 288 |
|
Tk_Window tkwin; /* Window to become new selection |
| 289 |
|
* owner. */ |
| 290 |
|
Atom selection; /* Selection that window should own. */ |
| 291 |
|
Tk_LostSelProc *proc; /* Procedure to call when selection |
| 292 |
|
* is taken away from tkwin. */ |
| 293 |
|
ClientData clientData; /* Arbitrary one-word argument to |
| 294 |
|
* pass to proc. */ |
| 295 |
|
{ |
| 296 |
|
register TkWindow *winPtr = (TkWindow *) tkwin; |
| 297 |
|
TkDisplay *dispPtr = winPtr->dispPtr; |
| 298 |
|
TkSelectionInfo *infoPtr; |
| 299 |
|
Tk_LostSelProc *clearProc = NULL; |
| 300 |
|
ClientData clearData = NULL; /* Initialization needed only to |
| 301 |
|
* prevent compiler warning. */ |
| 302 |
|
|
| 303 |
|
|
| 304 |
|
if (dispPtr->multipleAtom == None) { |
| 305 |
|
TkSelInit(tkwin); |
| 306 |
|
} |
| 307 |
|
Tk_MakeWindowExist(tkwin); |
| 308 |
|
|
| 309 |
|
/* |
| 310 |
|
* This code is somewhat tricky. First, we find the specified selection |
| 311 |
|
* on the selection list. If the previous owner is in this process, and |
| 312 |
|
* is a different window, then we need to invoke the clearProc. However, |
| 313 |
|
* it's dangerous to call the clearProc right now, because it could |
| 314 |
|
* invoke a Tcl script that wrecks the current state (e.g. it could |
| 315 |
|
* delete the window). To be safe, defer the call until the end of the |
| 316 |
|
* procedure when we no longer care about the state. |
| 317 |
|
*/ |
| 318 |
|
|
| 319 |
|
for (infoPtr = dispPtr->selectionInfoPtr; infoPtr != NULL; |
| 320 |
|
infoPtr = infoPtr->nextPtr) { |
| 321 |
|
if (infoPtr->selection == selection) { |
| 322 |
|
break; |
| 323 |
|
} |
| 324 |
|
} |
| 325 |
|
if (infoPtr == NULL) { |
| 326 |
|
infoPtr = (TkSelectionInfo*) ckalloc(sizeof(TkSelectionInfo)); |
| 327 |
|
infoPtr->selection = selection; |
| 328 |
|
infoPtr->nextPtr = dispPtr->selectionInfoPtr; |
| 329 |
|
dispPtr->selectionInfoPtr = infoPtr; |
| 330 |
|
} else if (infoPtr->clearProc != NULL) { |
| 331 |
|
if (infoPtr->owner != tkwin) { |
| 332 |
|
clearProc = infoPtr->clearProc; |
| 333 |
|
clearData = infoPtr->clearData; |
| 334 |
|
} else if (infoPtr->clearProc == LostSelection) { |
| 335 |
|
/* |
| 336 |
|
* If the selection handler is one created by "selection own", |
| 337 |
|
* be sure to free the record for it; otherwise there will be |
| 338 |
|
* a memory leak. |
| 339 |
|
*/ |
| 340 |
|
|
| 341 |
|
ckfree((char *) infoPtr->clearData); |
| 342 |
|
} |
| 343 |
|
} |
| 344 |
|
|
| 345 |
|
infoPtr->owner = tkwin; |
| 346 |
|
infoPtr->serial = NextRequest(winPtr->display); |
| 347 |
|
infoPtr->clearProc = proc; |
| 348 |
|
infoPtr->clearData = clientData; |
| 349 |
|
|
| 350 |
|
/* |
| 351 |
|
* Note that we are using CurrentTime, even though ICCCM recommends against |
| 352 |
|
* this practice (the problem is that we don't necessarily have a valid |
| 353 |
|
* time to use). We will not be able to retrieve a useful timestamp for |
| 354 |
|
* the TIMESTAMP target later. |
| 355 |
|
*/ |
| 356 |
|
|
| 357 |
|
infoPtr->time = CurrentTime; |
| 358 |
|
|
| 359 |
|
/* |
| 360 |
|
* Note that we are not checking to see if the selection claim succeeded. |
| 361 |
|
* If the ownership does not change, then the clearProc may never be |
| 362 |
|
* invoked, and we will return incorrect information when queried for the |
| 363 |
|
* current selection owner. |
| 364 |
|
*/ |
| 365 |
|
|
| 366 |
|
XSetSelectionOwner(winPtr->display, infoPtr->selection, winPtr->window, |
| 367 |
|
infoPtr->time); |
| 368 |
|
|
| 369 |
|
/* |
| 370 |
|
* Now that we are done, we can invoke clearProc without running into |
| 371 |
|
* reentrancy problems. |
| 372 |
|
*/ |
| 373 |
|
|
| 374 |
|
if (clearProc != NULL) { |
| 375 |
|
(*clearProc)(clearData); |
| 376 |
|
} |
| 377 |
|
} |
| 378 |
|
|
| 379 |
|
/* |
| 380 |
|
*---------------------------------------------------------------------- |
| 381 |
|
* |
| 382 |
|
* Tk_ClearSelection -- |
| 383 |
|
* |
| 384 |
|
* Eliminate the specified selection on tkwin's display, if there is one. |
| 385 |
|
* |
| 386 |
|
* Results: |
| 387 |
|
* None. |
| 388 |
|
* |
| 389 |
|
* Side effects: |
| 390 |
|
* The specified selection is cleared, so that future requests to retrieve |
| 391 |
|
* it will fail until some application owns it again. This procedure |
| 392 |
|
* invokes callbacks, possibly including Tcl scripts, so any calling |
| 393 |
|
* function should be reentrant at the point Tk_ClearSelection is invoked. |
| 394 |
|
* |
| 395 |
|
*---------------------------------------------------------------------- |
| 396 |
|
*/ |
| 397 |
|
|
| 398 |
|
void |
| 399 |
|
Tk_ClearSelection(tkwin, selection) |
| 400 |
|
Tk_Window tkwin; /* Window that selects a display. */ |
| 401 |
|
Atom selection; /* Selection to be cancelled. */ |
| 402 |
|
{ |
| 403 |
|
register TkWindow *winPtr = (TkWindow *) tkwin; |
| 404 |
|
TkDisplay *dispPtr = winPtr->dispPtr; |
| 405 |
|
TkSelectionInfo *infoPtr; |
| 406 |
|
TkSelectionInfo *prevPtr; |
| 407 |
|
TkSelectionInfo *nextPtr; |
| 408 |
|
Tk_LostSelProc *clearProc = NULL; |
| 409 |
|
ClientData clearData = NULL; /* Initialization needed only to |
| 410 |
|
* prevent compiler warning. */ |
| 411 |
|
|
| 412 |
|
if (dispPtr->multipleAtom == None) { |
| 413 |
|
TkSelInit(tkwin); |
| 414 |
|
} |
| 415 |
|
|
| 416 |
|
for (infoPtr = dispPtr->selectionInfoPtr, prevPtr = NULL; |
| 417 |
|
infoPtr != NULL; infoPtr = nextPtr) { |
| 418 |
|
nextPtr = infoPtr->nextPtr; |
| 419 |
|
if (infoPtr->selection == selection) { |
| 420 |
|
if (prevPtr == NULL) { |
| 421 |
|
dispPtr->selectionInfoPtr = nextPtr; |
| 422 |
|
} else { |
| 423 |
|
prevPtr->nextPtr = nextPtr; |
| 424 |
|
} |
| 425 |
|
break; |
| 426 |
|
} |
| 427 |
|
prevPtr = infoPtr; |
| 428 |
|
} |
| 429 |
|
|
| 430 |
|
if (infoPtr != NULL) { |
| 431 |
|
clearProc = infoPtr->clearProc; |
| 432 |
|
clearData = infoPtr->clearData; |
| 433 |
|
ckfree((char *) infoPtr); |
| 434 |
|
} |
| 435 |
|
XSetSelectionOwner(winPtr->display, selection, None, CurrentTime); |
| 436 |
|
|
| 437 |
|
if (clearProc != NULL) { |
| 438 |
|
(*clearProc)(clearData); |
| 439 |
|
} |
| 440 |
|
} |
| 441 |
|
|
| 442 |
|
/* |
| 443 |
|
*-------------------------------------------------------------- |
| 444 |
|
* |
| 445 |
|
* Tk_GetSelection -- |
| 446 |
|
* |
| 447 |
|
* Retrieve the value of a selection and pass it off (in |
| 448 |
|
* pieces, possibly) to a given procedure. |
| 449 |
|
* |
| 450 |
|
* Results: |
| 451 |
|
* The return value is a standard Tcl return value. |
| 452 |
|
* If an error occurs (such as no selection exists) |
| 453 |
|
* then an error message is left in the interp's result. |
| 454 |
|
* |
| 455 |
|
* Side effects: |
| 456 |
|
* The standard X11 protocols are used to retrieve the |
| 457 |
|
* selection. When it arrives, it is passed to proc. If |
| 458 |
|
* the selection is very large, it will be passed to proc |
| 459 |
|
* in several pieces. Proc should have the following |
| 460 |
|
* structure: |
| 461 |
|
* |
| 462 |
|
* int |
| 463 |
|
* proc(clientData, interp, portion) |
| 464 |
|
* ClientData clientData; |
| 465 |
|
* Tcl_Interp *interp; |
| 466 |
|
* char *portion; |
| 467 |
|
* { |
| 468 |
|
* } |
| 469 |
|
* |
| 470 |
|
* The interp and clientData arguments to proc will be the |
| 471 |
|
* same as the corresponding arguments to Tk_GetSelection. |
| 472 |
|
* The portion argument points to a character string |
| 473 |
|
* containing part of the selection, and numBytes indicates |
| 474 |
|
* the length of the portion, not including the terminating |
| 475 |
|
* NULL character. If the selection arrives in several pieces, |
| 476 |
|
* the "portion" arguments in separate calls will contain |
| 477 |
|
* successive parts of the selection. Proc should normally |
| 478 |
|
* return TCL_OK. If it detects an error then it should return |
| 479 |
|
* TCL_ERROR and leave an error message in the interp's result; the |
| 480 |
|
* remainder of the selection retrieval will be aborted. |
| 481 |
|
* |
| 482 |
|
*-------------------------------------------------------------- |
| 483 |
|
*/ |
| 484 |
|
|
| 485 |
|
int |
| 486 |
|
Tk_GetSelection(interp, tkwin, selection, target, proc, clientData) |
| 487 |
|
Tcl_Interp *interp; /* Interpreter to use for reporting |
| 488 |
|
* errors. */ |
| 489 |
|
Tk_Window tkwin; /* Window on whose behalf to retrieve |
| 490 |
|
* the selection (determines display |
| 491 |
|
* from which to retrieve). */ |
| 492 |
|
Atom selection; /* Selection to retrieve. */ |
| 493 |
|
Atom target; /* Desired form in which selection |
| 494 |
|
* is to be returned. */ |
| 495 |
|
Tk_GetSelProc *proc; /* Procedure to call to process the |
| 496 |
|
* selection, once it has been retrieved. */ |
| 497 |
|
ClientData clientData; /* Arbitrary value to pass to proc. */ |
| 498 |
|
{ |
| 499 |
|
TkWindow *winPtr = (TkWindow *) tkwin; |
| 500 |
|
TkDisplay *dispPtr = winPtr->dispPtr; |
| 501 |
|
TkSelectionInfo *infoPtr; |
| 502 |
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 503 |
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 504 |
|
|
| 505 |
|
if (dispPtr->multipleAtom == None) { |
| 506 |
|
TkSelInit(tkwin); |
| 507 |
|
} |
| 508 |
|
|
| 509 |
|
/* |
| 510 |
|
* If the selection is owned by a window managed by this |
| 511 |
|
* process, then call the retrieval procedure directly, |
| 512 |
|
* rather than going through the X server (it's dangerous |
| 513 |
|
* to go through the X server in this case because it could |
| 514 |
|
* result in deadlock if an INCR-style selection results). |
| 515 |
|
*/ |
| 516 |
|
|
| 517 |
|
for (infoPtr = dispPtr->selectionInfoPtr; infoPtr != NULL; |
| 518 |
|
infoPtr = infoPtr->nextPtr) { |
| 519 |
|
if (infoPtr->selection == selection) |
| 520 |
|
break; |
| 521 |
|
} |
| 522 |
|
if (infoPtr != NULL) { |
| 523 |
|
register TkSelHandler *selPtr; |
| 524 |
|
int offset, result, count; |
| 525 |
|
char buffer[TK_SEL_BYTES_AT_ONCE+1]; |
| 526 |
|
TkSelInProgress ip; |
| 527 |
|
|
| 528 |
|
for (selPtr = ((TkWindow *) infoPtr->owner)->selHandlerList; |
| 529 |
|
selPtr != NULL; selPtr = selPtr->nextPtr) { |
| 530 |
|
if ((selPtr->target == target) |
| 531 |
|
&& (selPtr->selection == selection)) { |
| 532 |
|
break; |
| 533 |
|
} |
| 534 |
|
} |
| 535 |
|
if (selPtr == NULL) { |
| 536 |
|
Atom type; |
| 537 |
|
|
| 538 |
|
count = TkSelDefaultSelection(infoPtr, target, buffer, |
| 539 |
|
TK_SEL_BYTES_AT_ONCE, &type); |
| 540 |
|
if (count > TK_SEL_BYTES_AT_ONCE) { |
| 541 |
|
panic("selection handler returned too many bytes"); |
| 542 |
|
} |
| 543 |
|
if (count < 0) { |
| 544 |
|
goto cantget; |
| 545 |
|
} |
| 546 |
|
buffer[count] = 0; |
| 547 |
|
result = (*proc)(clientData, interp, buffer); |
| 548 |
|
} else { |
| 549 |
|
offset = 0; |
| 550 |
|
result = TCL_OK; |
| 551 |
|
ip.selPtr = selPtr; |
| 552 |
|
ip.nextPtr = tsdPtr->pendingPtr; |
| 553 |
|
tsdPtr->pendingPtr = &ip; |
| 554 |
|
while (1) { |
| 555 |
|
count = (selPtr->proc)(selPtr->clientData, offset, buffer, |
| 556 |
|
TK_SEL_BYTES_AT_ONCE); |
| 557 |
|
if ((count < 0) || (ip.selPtr == NULL)) { |
| 558 |
|
tsdPtr->pendingPtr = ip.nextPtr; |
| 559 |
|
goto cantget; |
| 560 |
|
} |
| 561 |
|
if (count > TK_SEL_BYTES_AT_ONCE) { |
| 562 |
|
panic("selection handler returned too many bytes"); |
| 563 |
|
} |
| 564 |
|
buffer[count] = '\0'; |
| 565 |
|
result = (*proc)(clientData, interp, buffer); |
| 566 |
|
if ((result != TCL_OK) || (count < TK_SEL_BYTES_AT_ONCE) |
| 567 |
|
|| (ip.selPtr == NULL)) { |
| 568 |
|
break; |
| 569 |
|
} |
| 570 |
|
offset += count; |
| 571 |
|
} |
| 572 |
|
tsdPtr->pendingPtr = ip.nextPtr; |
| 573 |
|
} |
| 574 |
|
return result; |
| 575 |
|
} |
| 576 |
|
|
| 577 |
|
/* |
| 578 |
|
* The selection is owned by some other process. |
| 579 |
|
*/ |
| 580 |
|
|
| 581 |
|
return TkSelGetSelection(interp, tkwin, selection, target, proc, |
| 582 |
|
clientData); |
| 583 |
|
|
| 584 |
|
cantget: |
| 585 |
|
Tcl_AppendResult(interp, Tk_GetAtomName(tkwin, selection), |
| 586 |
|
" selection doesn't exist or form \"", Tk_GetAtomName(tkwin, target), |
| 587 |
|
"\" not defined", (char *) NULL); |
| 588 |
|
return TCL_ERROR; |
| 589 |
|
} |
| 590 |
|
|
| 591 |
|
/* |
| 592 |
|
*-------------------------------------------------------------- |
| 593 |
|
* |
| 594 |
|
* Tk_SelectionCmd -- |
| 595 |
|
* |
| 596 |
|
* This procedure is invoked to process the "selection" Tcl |
| 597 |
|
* command. See the user documentation for details on what |
| 598 |
|
* it does. |
| 599 |
|
* |
| 600 |
|
* Results: |
| 601 |
|
* A standard Tcl result. |
| 602 |
|
* |
| 603 |
|
* Side effects: |
| 604 |
|
* See the user documentation. |
| 605 |
|
* |
| 606 |
|
*-------------------------------------------------------------- |
| 607 |
|
*/ |
| 608 |
|
|
| 609 |
|
int |
| 610 |
|
Tk_SelectionCmd(clientData, interp, argc, argv) |
| 611 |
|
ClientData clientData; /* Main window associated with |
| 612 |
|
* interpreter. */ |
| 613 |
|
Tcl_Interp *interp; /* Current interpreter. */ |
| 614 |
|
int argc; /* Number of arguments. */ |
| 615 |
|
char **argv; /* Argument strings. */ |
| 616 |
|
{ |
| 617 |
|
Tk_Window tkwin = (Tk_Window) clientData; |
| 618 |
|
char *path = NULL; |
| 619 |
|
Atom selection; |
| 620 |
|
char *selName = NULL; |
| 621 |
|
int c, count; |
| 622 |
|
size_t length; |
| 623 |
|
char **args; |
| 624 |
|
|
| 625 |
|
if (argc < 2) { |
| 626 |
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 627 |
|
" option ?arg arg ...?\"", (char *) NULL); |
| 628 |
|
return TCL_ERROR; |
| 629 |
|
} |
| 630 |
|
c = argv[1][0]; |
| 631 |
|
length = strlen(argv[1]); |
| 632 |
|
if ((c == 'c') && (strncmp(argv[1], "clear", length) == 0)) { |
| 633 |
|
for (count = argc-2, args = argv+2; count > 0; count -= 2, args += 2) { |
| 634 |
|
if (args[0][0] != '-') { |
| 635 |
|
break; |
| 636 |
|
} |
| 637 |
|
if (count < 2) { |
| 638 |
|
Tcl_AppendResult(interp, "value for \"", *args, |
| 639 |
|
"\" missing", (char *) NULL); |
| 640 |
|
return TCL_ERROR; |
| 641 |
|
} |
| 642 |
|
c = args[0][1]; |
| 643 |
|
length = strlen(args[0]); |
| 644 |
|
if ((c == 'd') && (strncmp(args[0], "-displayof", length) == 0)) { |
| 645 |
|
path = args[1]; |
| 646 |
|
} else if ((c == 's') |
| 647 |
|
&& (strncmp(args[0], "-selection", length) == 0)) { |
| 648 |
|
selName = args[1]; |
| 649 |
|
} else { |
| 650 |
|
Tcl_AppendResult(interp, "unknown option \"", args[0], |
| 651 |
|
"\"", (char *) NULL); |
| 652 |
|
return TCL_ERROR; |
| 653 |
|
} |
| 654 |
|
} |
| 655 |
|
if (count == 1) { |
| 656 |
|
path = args[0]; |
| 657 |
|
} else if (count > 1) { |
| 658 |
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 659 |
|
" clear ?options?\"", (char *) NULL); |
| 660 |
|
return TCL_ERROR; |
| 661 |
|
} |
| 662 |
|
if (path != NULL) { |
| 663 |
|
tkwin = Tk_NameToWindow(interp, path, tkwin); |
| 664 |
|
} |
| 665 |
|
if (tkwin == NULL) { |
| 666 |
|
return TCL_ERROR; |
| 667 |
|
} |
| 668 |
|
if (selName != NULL) { |
| 669 |
|
selection = Tk_InternAtom(tkwin, selName); |
| 670 |
|
} else { |
| 671 |
|
selection = XA_PRIMARY; |
| 672 |
|
} |
| 673 |
|
|
| 674 |
|
Tk_ClearSelection(tkwin, selection); |
| 675 |
|
return TCL_OK; |
| 676 |
|
} else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) { |
| 677 |
|
Atom target; |
| 678 |
|
char *targetName = NULL; |
| 679 |
|
Tcl_DString selBytes; |
| 680 |
|
int result; |
| 681 |
|
|
| 682 |
|
for (count = argc-2, args = argv+2; count > 0; count -= 2, args += 2) { |
| 683 |
|
if (args[0][0] != '-') { |
| 684 |
|
break; |
| 685 |
|
} |
| 686 |
|
if (count < 2) { |
| 687 |
|
Tcl_AppendResult(interp, "value for \"", *args, |
| 688 |
|
"\" missing", (char *) NULL); |
| 689 |
|
return TCL_ERROR; |
| 690 |
|
} |
| 691 |
|
c = args[0][1]; |
| 692 |
|
length = strlen(args[0]); |
| 693 |
|
if ((c == 'd') && (strncmp(args[0], "-displayof", length) == 0)) { |
| 694 |
|
path = args[1]; |
| 695 |
|
} else if ((c == 's') |
| 696 |
|
&& (strncmp(args[0], "-selection", length) == 0)) { |
| 697 |
|
selName = args[1]; |
| 698 |
|
} else if ((c == 't') |
| 699 |
|
&& (strncmp(args[0], "-type", length) == 0)) { |
| 700 |
|
targetName = args[1]; |
| 701 |
|
} else { |
| 702 |
|
Tcl_AppendResult(interp, "unknown option \"", args[0], |
| 703 |
|
"\"", (char *) NULL); |
| 704 |
|
return TCL_ERROR; |
| 705 |
|
} |
| 706 |
|
} |
| 707 |
|
if (path != NULL) { |
| 708 |
|
tkwin = Tk_NameToWindow(interp, path, tkwin); |
| 709 |
|
} |
| 710 |
|
if (tkwin == NULL) { |
| 711 |
|
return TCL_ERROR; |
| 712 |
|
} |
| 713 |
|
if (selName != NULL) { |
| 714 |
|
selection = Tk_InternAtom(tkwin, selName); |
| 715 |
|
} else { |
| 716 |
|
selection = XA_PRIMARY; |
| 717 |
|
} |
| 718 |
|
if (count > 1) { |
| 719 |
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 720 |
|
" get ?options?\"", (char *) NULL); |
| 721 |
|
return TCL_ERROR; |
| 722 |
|
} else if (count == 1) { |
| 723 |
|
target = Tk_InternAtom(tkwin, args[0]); |
| 724 |
|
} else if (targetName != NULL) { |
| 725 |
|
target = Tk_InternAtom(tkwin, targetName); |
| 726 |
|
} else { |
| 727 |
|
target = XA_STRING; |
| 728 |
|
} |
| 729 |
|
|
| 730 |
|
Tcl_DStringInit(&selBytes); |
| 731 |
|
result = Tk_GetSelection(interp, tkwin, selection, target, SelGetProc, |
| 732 |
|
(ClientData) &selBytes); |
| 733 |
|
if (result == TCL_OK) { |
| 734 |
|
Tcl_DStringResult(interp, &selBytes); |
| 735 |
|
} else { |
| 736 |
|
Tcl_DStringFree(&selBytes); |
| 737 |
|
} |
| 738 |
|
return result; |
| 739 |
|
} else if ((c == 'h') && (strncmp(argv[1], "handle", length) == 0)) { |
| 740 |
|
Atom target, format; |
| 741 |
|
char *targetName = NULL; |
| 742 |
|
char *formatName = NULL; |
| 743 |
|
register CommandInfo *cmdInfoPtr; |
| 744 |
|
int cmdLength; |
| 745 |
|
|
| 746 |
|
for (count = argc-2, args = argv+2; count > 0; count -= 2, args += 2) { |
| 747 |
|
if (args[0][0] != '-') { |
| 748 |
|
break; |
| 749 |
|
} |
| 750 |
|
if (count < 2) { |
| 751 |
|
Tcl_AppendResult(interp, "value for \"", *args, |
| 752 |
|
"\" missing", (char *) NULL); |
| 753 |
|
return TCL_ERROR; |
| 754 |
|
} |
| 755 |
|
c = args[0][1]; |
| 756 |
|
length = strlen(args[0]); |
| 757 |
|
if ((c == 'f') && (strncmp(args[0], "-format", length) == 0)) { |
| 758 |
|
formatName = args[1]; |
| 759 |
|
} else if ((c == 's') |
| 760 |
|
&& (strncmp(args[0], "-selection", length) == 0)) { |
| 761 |
|
selName = args[1]; |
| 762 |
|
} else if ((c == 't') |
| 763 |
|
&& (strncmp(args[0], "-type", length) == 0)) { |
| 764 |
|
targetName = args[1]; |
| 765 |
|
} else { |
| 766 |
|
Tcl_AppendResult(interp, "unknown option \"", args[0], |
| 767 |
|
"\"", (char *) NULL); |
| 768 |
|
return TCL_ERROR; |
| 769 |
|
} |
| 770 |
|
} |
| 771 |
|
|
| 772 |
|
if ((count < 2) || (count > 4)) { |
| 773 |
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 774 |
|
" handle ?options? window command\"", (char *) NULL); |
| 775 |
|
return TCL_ERROR; |
| 776 |
|
} |
| 777 |
|
tkwin = Tk_NameToWindow(interp, args[0], tkwin); |
| 778 |
|
if (tkwin == NULL) { |
| 779 |
|
return TCL_ERROR; |
| 780 |
|
} |
| 781 |
|
if (selName != NULL) { |
| 782 |
|
selection = Tk_InternAtom(tkwin, selName); |
| 783 |
|
} else { |
| 784 |
|
selection = XA_PRIMARY; |
| 785 |
|
} |
| 786 |
|
|
| 787 |
|
if (count > 2) { |
| 788 |
|
target = Tk_InternAtom(tkwin, args[2]); |
| 789 |
|
} else if (targetName != NULL) { |
| 790 |
|
target = Tk_InternAtom(tkwin, targetName); |
| 791 |
|
} else { |
| 792 |
|
target = XA_STRING; |
| 793 |
|
} |
| 794 |
|
if (count > 3) { |
| 795 |
|
format = Tk_InternAtom(tkwin, args[3]); |
| 796 |
|
} else if (formatName != NULL) { |
| 797 |
|
format = Tk_InternAtom(tkwin, formatName); |
| 798 |
|
} else { |
| 799 |
|
format = XA_STRING; |
| 800 |
|
} |
| 801 |
|
cmdLength = strlen(args[1]); |
| 802 |
|
if (cmdLength == 0) { |
| 803 |
|
Tk_DeleteSelHandler(tkwin, selection, target); |
| 804 |
|
} else { |
| 805 |
|
cmdInfoPtr = (CommandInfo *) ckalloc((unsigned) ( |
| 806 |
|
sizeof(CommandInfo) - 3 + cmdLength)); |
| 807 |
|
cmdInfoPtr->interp = interp; |
| 808 |
|
cmdInfoPtr->charOffset = 0; |
| 809 |
|
cmdInfoPtr->byteOffset = 0; |
| 810 |
|
cmdInfoPtr->buffer[0] = '\0'; |
| 811 |
|
cmdInfoPtr->cmdLength = cmdLength; |
| 812 |
|
strcpy(cmdInfoPtr->command, args[1]); |
| 813 |
|
Tk_CreateSelHandler(tkwin, selection, target, HandleTclCommand, |
| 814 |
|
(ClientData) cmdInfoPtr, format); |
| 815 |
|
} |
| 816 |
|
return TCL_OK; |
| 817 |
|
} else if ((c == 'o') && (strncmp(argv[1], "own", length) == 0)) { |
| 818 |
|
register LostCommand *lostPtr; |
| 819 |
|
char *script = NULL; |
| 820 |
|
int cmdLength; |
| 821 |
|
|
| 822 |
|
for (count = argc-2, args = argv+2; count > 0; count -= 2, args += 2) { |
| 823 |
|
if (args[0][0] != '-') { |
| 824 |
|
break; |
| 825 |
|
} |
| 826 |
|
if (count < 2) { |
| 827 |
|
Tcl_AppendResult(interp, "value for \"", *args, |
| 828 |
|
"\" missing", (char *) NULL); |
| 829 |
|
return TCL_ERROR; |
| 830 |
|
} |
| 831 |
|
c = args[0][1]; |
| 832 |
|
length = strlen(args[0]); |
| 833 |
|
if ((c == 'c') && (strncmp(args[0], "-command", length) == 0)) { |
| 834 |
|
script = args[1]; |
| 835 |
|
} else if ((c == 'd') |
| 836 |
|
&& (strncmp(args[0], "-displayof", length) == 0)) { |
| 837 |
|
path = args[1]; |
| 838 |
|
} else if ((c == 's') |
| 839 |
|
&& (strncmp(args[0], "-selection", length) == 0)) { |
| 840 |
|
selName = args[1]; |
| 841 |
|
} else { |
| 842 |
|
Tcl_AppendResult(interp, "unknown option \"", args[0], |
| 843 |
|
"\"", (char *) NULL); |
| 844 |
|
return TCL_ERROR; |
| 845 |
|
} |
| 846 |
|
} |
| 847 |
|
|
| 848 |
|
if (count > 2) { |
| 849 |
|
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], |
| 850 |
|
" own ?options? ?window?\"", (char *) NULL); |
| 851 |
|
return TCL_ERROR; |
| 852 |
|
} |
| 853 |
|
if (selName != NULL) { |
| 854 |
|
selection = Tk_InternAtom(tkwin, selName); |
| 855 |
|
} else { |
| 856 |
|
selection = XA_PRIMARY; |
| 857 |
|
} |
| 858 |
|
if (count == 0) { |
| 859 |
|
TkSelectionInfo *infoPtr; |
| 860 |
|
TkWindow *winPtr; |
| 861 |
|
if (path != NULL) { |
| 862 |
|
tkwin = Tk_NameToWindow(interp, path, tkwin); |
| 863 |
|
} |
| 864 |
|
if (tkwin == NULL) { |
| 865 |
|
return TCL_ERROR; |
| 866 |
|
} |
| 867 |
|
winPtr = (TkWindow *)tkwin; |
| 868 |
|
for (infoPtr = winPtr->dispPtr->selectionInfoPtr; infoPtr != NULL; |
| 869 |
|
infoPtr = infoPtr->nextPtr) { |
| 870 |
|
if (infoPtr->selection == selection) |
| 871 |
|
break; |
| 872 |
|
} |
| 873 |
|
|
| 874 |
|
/* |
| 875 |
|
* Ignore the internal clipboard window. |
| 876 |
|
*/ |
| 877 |
|
|
| 878 |
|
if ((infoPtr != NULL) |
| 879 |
|
&& (infoPtr->owner != winPtr->dispPtr->clipWindow)) { |
| 880 |
|
Tcl_SetResult(interp, Tk_PathName(infoPtr->owner), TCL_STATIC); |
| 881 |
|
} |
| 882 |
|
return TCL_OK; |
| 883 |
|
} |
| 884 |
|
tkwin = Tk_NameToWindow(interp, args[0], tkwin); |
| 885 |
|
if (tkwin == NULL) { |
| 886 |
|
return TCL_ERROR; |
| 887 |
|
} |
| 888 |
|
if (count == 2) { |
| 889 |
|
script = args[1]; |
| 890 |
|
} |
| 891 |
|
if (script == NULL) { |
| 892 |
|
Tk_OwnSelection(tkwin, selection, (Tk_LostSelProc *) NULL, |
| 893 |
|
(ClientData) NULL); |
| 894 |
|
return TCL_OK; |
| 895 |
|
} |
| 896 |
|
cmdLength = strlen(script); |
| 897 |
|
lostPtr = (LostCommand *) ckalloc((unsigned) (sizeof(LostCommand) |
| 898 |
|
-3 + cmdLength)); |
| 899 |
|
lostPtr->interp = interp; |
| 900 |
|
strcpy(lostPtr->command, script); |
| 901 |
|
Tk_OwnSelection(tkwin, selection, LostSelection, (ClientData) lostPtr); |
| 902 |
|
return TCL_OK; |
| 903 |
|
} else { |
| 904 |
|
Tcl_AppendResult(interp, "bad option \"", argv[1], |
| 905 |
|
"\": must be clear, get, handle, or own", (char *) NULL); |
| 906 |
|
return TCL_ERROR; |
| 907 |
|
} |
| 908 |
|
} |
| 909 |
|
|
| 910 |
|
/* |
| 911 |
|
*---------------------------------------------------------------------- |
| 912 |
|
* |
| 913 |
|
* TkSelGetInProgress -- |
| 914 |
|
* |
| 915 |
|
* This procedure returns a pointer to the thread-local |
| 916 |
|
* list of pending searches. |
| 917 |
|
* |
| 918 |
|
* Results: |
| 919 |
|
* The return value is a pointer to the first search in progress, |
| 920 |
|
* or NULL if there are none. |
| 921 |
|
* |
| 922 |
|
* Side effects: |
| 923 |
|
* None. |
| 924 |
|
* |
| 925 |
|
*---------------------------------------------------------------------- |
| 926 |
|
*/ |
| 927 |
|
|
| 928 |
|
TkSelInProgress * |
| 929 |
|
TkSelGetInProgress _ANSI_ARGS_((void)) |
| 930 |
|
{ |
| 931 |
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 932 |
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 933 |
|
|
| 934 |
|
return tsdPtr->pendingPtr; |
| 935 |
|
} |
| 936 |
|
|
| 937 |
|
/* |
| 938 |
|
*---------------------------------------------------------------------- |
| 939 |
|
* |
| 940 |
|
* TkSelSetInProgress -- |
| 941 |
|
* |
| 942 |
|
* This procedure is used to set the thread-local list of pending |
| 943 |
|
* searches. It is required because the pending list is kept |
| 944 |
|
* in thread local storage. |
| 945 |
|
* |
| 946 |
|
* Results: |
| 947 |
|
* None. |
| 948 |
|
* |
| 949 |
|
* Side effects: |
| 950 |
|
* None. |
| 951 |
|
* |
| 952 |
|
*---------------------------------------------------------------------- |
| 953 |
|
*/ |
| 954 |
|
void |
| 955 |
|
TkSelSetInProgress(pendingPtr) |
| 956 |
|
TkSelInProgress *pendingPtr; |
| 957 |
|
{ |
| 958 |
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 959 |
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 960 |
|
|
| 961 |
|
tsdPtr->pendingPtr = pendingPtr; |
| 962 |
|
} |
| 963 |
|
|
| 964 |
|
/* |
| 965 |
|
*---------------------------------------------------------------------- |
| 966 |
|
* |
| 967 |
|
* TkSelDeadWindow -- |
| 968 |
|
* |
| 969 |
|
* This procedure is invoked just before a TkWindow is deleted. |
| 970 |
|
* It performs selection-related cleanup. |
| 971 |
|
* |
| 972 |
|
* Results: |
| 973 |
|
* None. |
| 974 |
|
* |
| 975 |
|
* Side effects: |
| 976 |
|
* Frees up memory associated with the selection. |
| 977 |
|
* |
| 978 |
|
*---------------------------------------------------------------------- |
| 979 |
|
*/ |
| 980 |
|
|
| 981 |
|
void |
| 982 |
|
TkSelDeadWindow(winPtr) |
| 983 |
|
register TkWindow *winPtr; /* Window that's being deleted. */ |
| 984 |
|
{ |
| 985 |
|
register TkSelHandler *selPtr; |
| 986 |
|
register TkSelInProgress *ipPtr; |
| 987 |
|
TkSelectionInfo *infoPtr, *prevPtr, *nextPtr; |
| 988 |
|
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 989 |
|
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 990 |
|
|
| 991 |
|
/* |
| 992 |
|
* While deleting all the handlers, be careful to check whether |
| 993 |
|
* ConvertSelection or TkSelPropProc are about to process one of the |
| 994 |
|
* deleted handlers. |
| 995 |
|
*/ |
| 996 |
|
|
| 997 |
|
while (winPtr->selHandlerList != NULL) { |
| 998 |
|
selPtr = winPtr->selHandlerList; |
| 999 |
|
winPtr->selHandlerList = selPtr->nextPtr; |
| 1000 |
|
for (ipPtr = tsdPtr->pendingPtr; ipPtr != NULL; |
| 1001 |
|
ipPtr = ipPtr->nextPtr) { |
| 1002 |
|
if (ipPtr->selPtr == selPtr) { |
| 1003 |
|
ipPtr->selPtr = NULL; |
| 1004 |
|
} |
| 1005 |
|
} |
| 1006 |
|
if (selPtr->proc == HandleTclCommand) { |
| 1007 |
|
/* |
| 1008 |
|
* Mark the CommandInfo as deleted and free it if we can. |
| 1009 |
|
*/ |
| 1010 |
|
|
| 1011 |
|
((CommandInfo*)selPtr->clientData)->interp = NULL; |
| 1012 |
|
Tcl_EventuallyFree(selPtr->clientData, Tcl_Free); |
| 1013 |
|
} |
| 1014 |
|
ckfree((char *) selPtr); |
| 1015 |
|
} |
| 1016 |
|
|
| 1017 |
|
/* |
| 1018 |
|
* Remove selections owned by window being deleted. |
| 1019 |
|
*/ |
| 1020 |
|
|
| 1021 |
|
for (infoPtr = winPtr->dispPtr->selectionInfoPtr, prevPtr = NULL; |
| 1022 |
|
infoPtr != NULL; infoPtr = nextPtr) { |
| 1023 |
|
nextPtr = infoPtr->nextPtr; |
| 1024 |
|
if (infoPtr->owner == (Tk_Window) winPtr) { |
| 1025 |
|
if (infoPtr->clearProc == LostSelection) { |
| 1026 |
|
ckfree((char *) infoPtr->clearData); |
| 1027 |
|
} |
| 1028 |
|
ckfree((char *) infoPtr); |
| 1029 |
|
infoPtr = prevPtr; |
| 1030 |
|
if (prevPtr == NULL) { |
| 1031 |
|
winPtr->dispPtr->selectionInfoPtr = nextPtr; |
| 1032 |
|
} else { |
| 1033 |
|
prevPtr->nextPtr = nextPtr; |
| 1034 |
|
} |
| 1035 |
|
} |
| 1036 |
|
prevPtr = infoPtr; |
| 1037 |
|
} |
| 1038 |
|
} |
| 1039 |
|
|
| 1040 |
|
/* |
| 1041 |
|
*---------------------------------------------------------------------- |
| 1042 |
|
* |
| 1043 |
|
* TkSelInit -- |
| 1044 |
|
* |
| 1045 |
|
* Initialize selection-related information for a display. |
| 1046 |
|
* |
| 1047 |
|
* Results: |
| 1048 |
|
* None. |
| 1049 |
|
* |
| 1050 |
|
* Side effects: |
| 1051 |
|
* Selection-related information is initialized. |
| 1052 |
|
* |
| 1053 |
|
*---------------------------------------------------------------------- |
| 1054 |
|
*/ |
| 1055 |
|
|
| 1056 |
|
void |
| 1057 |
|
TkSelInit(tkwin) |
| 1058 |
|
Tk_Window tkwin; /* Window token (used to find |
| 1059 |
|
* display to initialize). */ |
| 1060 |
|
{ |
| 1061 |
|
register TkDisplay *dispPtr = ((TkWindow *) tkwin)->dispPtr; |
| 1062 |
|
|
| 1063 |
|
/* |
| 1064 |
|
* Fetch commonly-used atoms. |
| 1065 |
|
*/ |
| 1066 |
|
|
| 1067 |
|
dispPtr->multipleAtom = Tk_InternAtom(tkwin, "MULTIPLE"); |
| 1068 |
|
dispPtr->incrAtom = Tk_InternAtom(tkwin, "INCR"); |
| 1069 |
|
dispPtr->targetsAtom = Tk_InternAtom(tkwin, "TARGETS"); |
| 1070 |
|
dispPtr->timestampAtom = Tk_InternAtom(tkwin, "TIMESTAMP"); |
| 1071 |
|
dispPtr->textAtom = Tk_InternAtom(tkwin, "TEXT"); |
| 1072 |
|
dispPtr->compoundTextAtom = Tk_InternAtom(tkwin, "COMPOUND_TEXT"); |
| 1073 |
|
dispPtr->applicationAtom = Tk_InternAtom(tkwin, "TK_APPLICATION"); |
| 1074 |
|
dispPtr->windowAtom = Tk_InternAtom(tkwin, "TK_WINDOW"); |
| 1075 |
|
dispPtr->clipboardAtom = Tk_InternAtom(tkwin, "CLIPBOARD"); |
| 1076 |
|
} |
| 1077 |
|
|
| 1078 |
|
/* |
| 1079 |
|
*---------------------------------------------------------------------- |
| 1080 |
|
* |
| 1081 |
|
* TkSelClearSelection -- |
| 1082 |
|
* |
| 1083 |
|
* This procedure is invoked to process a SelectionClear event. |
| 1084 |
|
* |
| 1085 |
|
* Results: |
| 1086 |
|
* None. |
| 1087 |
|
* |
| 1088 |
|
* Side effects: |
| 1089 |
|
* Invokes the clear procedure for the window which lost the |
| 1090 |
|
* selection. |
| 1091 |
|
* |
| 1092 |
|
*---------------------------------------------------------------------- |
| 1093 |
|
*/ |
| 1094 |
|
|
| 1095 |
|
void |
| 1096 |
|
TkSelClearSelection(tkwin, eventPtr) |
| 1097 |
|
Tk_Window tkwin; /* Window for which event was targeted. */ |
| 1098 |
|
register XEvent *eventPtr; /* X SelectionClear event. */ |
| 1099 |
|
{ |
| 1100 |
|
register TkWindow *winPtr = (TkWindow *) tkwin; |
| 1101 |
|
TkDisplay *dispPtr = winPtr->dispPtr; |
| 1102 |
|
TkSelectionInfo *infoPtr; |
| 1103 |
|
TkSelectionInfo *prevPtr; |
| 1104 |
|
|
| 1105 |
|
/* |
| 1106 |
|
* Invoke clear procedure for window that just lost the selection. This |
| 1107 |
|
* code is a bit tricky, because any callbacks due to selection changes |
| 1108 |
|
* between windows managed by the process have already been made. Thus, |
| 1109 |
|
* ignore the event unless it refers to the window that's currently the |
| 1110 |
|
* selection owner and the event was generated after the server saw the |
| 1111 |
|
* SetSelectionOwner request. |
| 1112 |
|
*/ |
| 1113 |
|
|
| 1114 |
|
for (infoPtr = dispPtr->selectionInfoPtr, prevPtr = NULL; |
| 1115 |
|
infoPtr != NULL; infoPtr = infoPtr->nextPtr) { |
| 1116 |
|
if (infoPtr->selection == eventPtr->xselectionclear.selection) { |
| 1117 |
|
break; |
| 1118 |
|
} |
| 1119 |
|
prevPtr = infoPtr; |
| 1120 |
|
} |
| 1121 |
|
|
| 1122 |
|
if (infoPtr != NULL && (infoPtr->owner == tkwin) |
| 1123 |
|
&& (eventPtr->xselectionclear.serial >= (unsigned) infoPtr->serial)) { |
| 1124 |
|
if (prevPtr == NULL) { |
| 1125 |
|
dispPtr->selectionInfoPtr = infoPtr->nextPtr; |
| 1126 |
|
} else { |
| 1127 |
|
prevPtr->nextPtr = infoPtr->nextPtr; |
| 1128 |
|
} |
| 1129 |
|
|
| 1130 |
|
/* |
| 1131 |
|
* Because of reentrancy problems, calling clearProc must be done |
| 1132 |
|
* after the infoPtr has been removed from the selectionInfoPtr |
| 1133 |
|
* list (clearProc could modify the list, e.g. by creating |
| 1134 |
|
* a new selection). |
| 1135 |
|
*/ |
| 1136 |
|
|
| 1137 |
|
if (infoPtr->clearProc != NULL) { |
| 1138 |
|
(*infoPtr->clearProc)(infoPtr->clearData); |
| 1139 |
|
} |
| 1140 |
|
ckfree((char *) infoPtr); |
| 1141 |
|
} |
| 1142 |
|
} |
| 1143 |
|
|
| 1144 |
|
/* |
| 1145 |
|
*-------------------------------------------------------------- |
| 1146 |
|
* |
| 1147 |
|
* SelGetProc -- |
| 1148 |
|
* |
| 1149 |
|
* This procedure is invoked to process pieces of the selection |
| 1150 |
|
* as they arrive during "selection get" commands. |
| 1151 |
|
* |
| 1152 |
|
* Results: |
| 1153 |
|
* Always returns TCL_OK. |
| 1154 |
|
* |
| 1155 |
|
* Side effects: |
| 1156 |
|
* Bytes get appended to the dynamic string pointed to by the |
| 1157 |
|
* clientData argument. |
| 1158 |
|
* |
| 1159 |
|
*-------------------------------------------------------------- |
| 1160 |
|
*/ |
| 1161 |
|
|
| 1162 |
|
/* ARGSUSED */ |
| 1163 |
|
static int |
| 1164 |
|
SelGetProc(clientData, interp, portion) |
| 1165 |
|
ClientData clientData; /* Dynamic string holding partially |
| 1166 |
|
* assembled selection. */ |
| 1167 |
|
Tcl_Interp *interp; /* Interpreter used for error |
| 1168 |
|
* reporting (not used). */ |
| 1169 |
|
char *portion; /* New information to be appended. */ |
| 1170 |
|
{ |
| 1171 |
|
Tcl_DStringAppend((Tcl_DString *) clientData, portion, -1); |
| 1172 |
|
return TCL_OK; |
| 1173 |
|
} |
| 1174 |
|
|
| 1175 |
|
/* |
| 1176 |
|
*---------------------------------------------------------------------- |
| 1177 |
|
* |
| 1178 |
|
* HandleTclCommand -- |
| 1179 |
|
* |
| 1180 |
|
* This procedure acts as selection handler for handlers created |
| 1181 |
|
* by the "selection handle" command. It invokes a Tcl command to |
| 1182 |
|
* retrieve the selection. |
| 1183 |
|
* |
| 1184 |
|
* Results: |
| 1185 |
|
* The return value is a count of the number of bytes actually |
| 1186 |
|
* stored at buffer, or -1 if an error occurs while executing |
| 1187 |
|
* the Tcl command to retrieve the selection. |
| 1188 |
|
* |
| 1189 |
|
* Side effects: |
| 1190 |
|
* None except for things done by the Tcl command. |
| 1191 |
|
* |
| 1192 |
|
*---------------------------------------------------------------------- |
| 1193 |
|
*/ |
| 1194 |
|
|
| 1195 |
|
static int |
| 1196 |
|
HandleTclCommand(clientData, offset, buffer, maxBytes) |
| 1197 |
|
ClientData clientData; /* Information about command to execute. */ |
| 1198 |
|
int offset; /* Return selection bytes starting at this |
| 1199 |
|
* offset. */ |
| 1200 |
|
char *buffer; /* Place to store converted selection. */ |
| 1201 |
|
int maxBytes; /* Maximum # of bytes to store at buffer. */ |
| 1202 |
|
{ |
| 1203 |
|
CommandInfo *cmdInfoPtr = (CommandInfo *) clientData; |
| 1204 |
|
int spaceNeeded, length; |
| 1205 |
|
#define MAX_STATIC_SIZE 100 |
| 1206 |
|
char staticSpace[MAX_STATIC_SIZE]; |
| 1207 |
|
char *command, *string; |
| 1208 |
|
Tcl_Interp *interp = cmdInfoPtr->interp; |
| 1209 |
|
Tcl_DString oldResult; |
| 1210 |
|
Tcl_Obj *objPtr; |
| 1211 |
|
int extraBytes, charOffset, count, numChars; |
| 1212 |
|
char *p; |
| 1213 |
|
|
| 1214 |
|
/* |
| 1215 |
|
* We must also protect the interpreter and the command from being |
| 1216 |
|
* deleted too soon. |
| 1217 |
|
*/ |
| 1218 |
|
|
| 1219 |
|
Tcl_Preserve(clientData); |
| 1220 |
|
Tcl_Preserve((ClientData) interp); |
| 1221 |
|
|
| 1222 |
|
/* |
| 1223 |
|
* Compute the proper byte offset in the case where the last chunk |
| 1224 |
|
* split a character. |
| 1225 |
|
*/ |
| 1226 |
|
|
| 1227 |
|
if (offset == cmdInfoPtr->byteOffset) { |
| 1228 |
|
charOffset = cmdInfoPtr->charOffset; |
| 1229 |
|
extraBytes = strlen(cmdInfoPtr->buffer); |
| 1230 |
|
if (extraBytes > 0) { |
| 1231 |
|
strcpy(buffer, cmdInfoPtr->buffer); |
| 1232 |
|
maxBytes -= extraBytes; |
| 1233 |
|
buffer += extraBytes; |
| 1234 |
|
} |
| 1235 |
|
} else { |
| 1236 |
|
cmdInfoPtr->byteOffset = 0; |
| 1237 |
|
cmdInfoPtr->charOffset = 0; |
| 1238 |
|
extraBytes = 0; |
| 1239 |
|
charOffset = 0; |
| 1240 |
|
} |
| 1241 |
|
|
| 1242 |
|
/* |
| 1243 |
|
* First, generate a command by taking the command string |
| 1244 |
|
* and appending the offset and maximum # of bytes. |
| 1245 |
|
*/ |
| 1246 |
|
|
| 1247 |
|
spaceNeeded = cmdInfoPtr->cmdLength + 30; |
| 1248 |
|
if (spaceNeeded < MAX_STATIC_SIZE) { |
| 1249 |
|
command = staticSpace; |
| 1250 |
|
} else { |
| 1251 |
|
command = (char *) ckalloc((unsigned) spaceNeeded); |
| 1252 |
|
} |
| 1253 |
|
sprintf(command, "%s %d %d", cmdInfoPtr->command, charOffset, maxBytes); |
| 1254 |
|
|
| 1255 |
|
/* |
| 1256 |
|
* Execute the command. Be sure to restore the state of the |
| 1257 |
|
* interpreter after executing the command. |
| 1258 |
|
*/ |
| 1259 |
|
|
| 1260 |
|
Tcl_DStringInit(&oldResult); |
| 1261 |
|
Tcl_DStringGetResult(interp, &oldResult); |
| 1262 |
|
if (TkCopyAndGlobalEval(interp, command) == TCL_OK) { |
| 1263 |
|
objPtr = Tcl_GetObjResult(interp); |
| 1264 |
|
string = Tcl_GetStringFromObj(objPtr, &length); |
| 1265 |
|
count = (length > maxBytes) ? maxBytes : length; |
| 1266 |
|
memcpy((VOID *) buffer, (VOID *) string, (size_t) count); |
| 1267 |
|
buffer[count] = '\0'; |
| 1268 |
|
|
| 1269 |
|
/* |
| 1270 |
|
* Update the partial character information for the next |
| 1271 |
|
* retrieval if the command has not been deleted. |
| 1272 |
|
*/ |
| 1273 |
|
|
| 1274 |
|
if (cmdInfoPtr->interp != NULL) { |
| 1275 |
|
if (length <= maxBytes) { |
| 1276 |
|
cmdInfoPtr->charOffset += Tcl_NumUtfChars(string, -1); |
| 1277 |
|
cmdInfoPtr->buffer[0] = '\0'; |
| 1278 |
|
} else { |
| 1279 |
|
p = string; |
| 1280 |
|
string += count; |
| 1281 |
|
numChars = 0; |
| 1282 |
|
while (p < string) { |
| 1283 |
|
p = Tcl_UtfNext(p); |
| 1284 |
|
numChars++; |
| 1285 |
|
} |
| 1286 |
|
cmdInfoPtr->charOffset += numChars; |
| 1287 |
|
length = p - string; |
| 1288 |
|
if (length > 0) { |
| 1289 |
|
strncpy(cmdInfoPtr->buffer, string, (size_t) length); |
| 1290 |
|
} |
| 1291 |
|
cmdInfoPtr->buffer[length] = '\0'; |
| 1292 |
|
} |
| 1293 |
|
cmdInfoPtr->byteOffset += count + extraBytes; |
| 1294 |
|
} |
| 1295 |
|
count += extraBytes; |
| 1296 |
|
} else { |
| 1297 |
|
count = -1; |
| 1298 |
|
} |
| 1299 |
|
Tcl_DStringResult(interp, &oldResult); |
| 1300 |
|
|
| 1301 |
|
if (command != staticSpace) { |
| 1302 |
|
ckfree(command); |
| 1303 |
|
} |
| 1304 |
|
|
| 1305 |
|
|
| 1306 |
|
Tcl_Release(clientData); |
| 1307 |
|
Tcl_Release((ClientData) interp); |
| 1308 |
|
return count; |
| 1309 |
|
} |
| 1310 |
|
|
| 1311 |
|
/* |
| 1312 |
|
*---------------------------------------------------------------------- |
| 1313 |
|
* |
| 1314 |
|
* TkSelDefaultSelection -- |
| 1315 |
|
* |
| 1316 |
|
* This procedure is called to generate selection information |
| 1317 |
|
* for a few standard targets such as TIMESTAMP and TARGETS. |
| 1318 |
|
* It is invoked only if no handler has been declared by the |
| 1319 |
|
* application. |
| 1320 |
|
* |
| 1321 |
|
* Results: |
| 1322 |
|
* If "target" is a standard target understood by this procedure, |
| 1323 |
|
* the selection is converted to that form and stored as a |
| 1324 |
|
* character string in buffer. The type of the selection (e.g. |
| 1325 |
|
* STRING or ATOM) is stored in *typePtr, and the return value is |
| 1326 |
|
* a count of the # of non-NULL bytes at buffer. If the target |
| 1327 |
|
* wasn't understood, or if there isn't enough space at buffer |
| 1328 |
|
* to hold the entire selection (no INCR-mode transfers for this |
| 1329 |
|
* stuff!), then -1 is returned. |
| 1330 |
|
* |
| 1331 |
|
* Side effects: |
| 1332 |
|
* None. |
| 1333 |
|
* |
| 1334 |
|
*---------------------------------------------------------------------- |
| 1335 |
|
*/ |
| 1336 |
|
|
| 1337 |
|
int |
| 1338 |
|
TkSelDefaultSelection(infoPtr, target, buffer, maxBytes, typePtr) |
| 1339 |
|
TkSelectionInfo *infoPtr; /* Info about selection being retrieved. */ |
| 1340 |
|
Atom target; /* Desired form of selection. */ |
| 1341 |
|
char *buffer; /* Place to put selection characters. */ |
| 1342 |
|
int maxBytes; /* Maximum # of bytes to store at buffer. */ |
| 1343 |
|
Atom *typePtr; /* Store here the type of the selection, |
| 1344 |
|
* for use in converting to proper X format. */ |
| 1345 |
|
{ |
| 1346 |
|
register TkWindow *winPtr = (TkWindow *) infoPtr->owner; |
| 1347 |
|
TkDisplay *dispPtr = winPtr->dispPtr; |
| 1348 |
|
|
| 1349 |
|
if (target == dispPtr->timestampAtom) { |
| 1350 |
|
if (maxBytes < 20) { |
| 1351 |
|
return -1; |
| 1352 |
|
} |
| 1353 |
|
sprintf(buffer, "0x%x", (unsigned int) infoPtr->time); |
| 1354 |
|
*typePtr = XA_INTEGER; |
| 1355 |
|
return strlen(buffer); |
| 1356 |
|
} |
| 1357 |
|
|
| 1358 |
|
if (target == dispPtr->targetsAtom) { |
| 1359 |
|
register TkSelHandler *selPtr; |
| 1360 |
|
char *atomString; |
| 1361 |
|
int length, atomLength; |
| 1362 |
|
|
| 1363 |
|
if (maxBytes < 50) { |
| 1364 |
|
return -1; |
| 1365 |
|
} |
| 1366 |
|
strcpy(buffer, "MULTIPLE TARGETS TIMESTAMP TK_APPLICATION TK_WINDOW"); |
| 1367 |
|
length = strlen(buffer); |
| 1368 |
|
for (selPtr = winPtr->selHandlerList; selPtr != NULL; |
| 1369 |
|
selPtr = selPtr->nextPtr) { |
| 1370 |
|
if ((selPtr->selection == infoPtr->selection) |
| 1371 |
|
&& (selPtr->target != dispPtr->applicationAtom) |
| 1372 |
|
&& (selPtr->target != dispPtr->windowAtom)) { |
| 1373 |
|
atomString = Tk_GetAtomName((Tk_Window) winPtr, |
| 1374 |
|
selPtr->target); |
| 1375 |
|
atomLength = strlen(atomString) + 1; |
| 1376 |
|
if ((length + atomLength) >= maxBytes) { |
| 1377 |
|
return -1; |
| 1378 |
|
} |
| 1379 |
|
sprintf(buffer+length, " %s", atomString); |
| 1380 |
|
length += atomLength; |
| 1381 |
|
} |
| 1382 |
|
} |
| 1383 |
|
*typePtr = XA_ATOM; |
| 1384 |
|
return length; |
| 1385 |
|
} |
| 1386 |
|
|
| 1387 |
|
if (target == dispPtr->applicationAtom) { |
| 1388 |
|
int length; |
| 1389 |
|
char *name = winPtr->mainPtr->winPtr->nameUid; |
| 1390 |
|
|
| 1391 |
|
length = strlen(name); |
| 1392 |
|
if (maxBytes <= length) { |
| 1393 |
|
return -1; |
| 1394 |
|
} |
| 1395 |
|
strcpy(buffer, name); |
| 1396 |
|
*typePtr = XA_STRING; |
| 1397 |
|
return length; |
| 1398 |
|
} |
| 1399 |
|
|
| 1400 |
|
if (target == dispPtr->windowAtom) { |
| 1401 |
|
int length; |
| 1402 |
|
char *name = winPtr->pathName; |
| 1403 |
|
|
| 1404 |
|
length = strlen(name); |
| 1405 |
|
if (maxBytes <= length) { |
| 1406 |
|
return -1; |
| 1407 |
|
} |
| 1408 |
|
strcpy(buffer, name); |
| 1409 |
|
*typePtr = XA_STRING; |
| 1410 |
|
return length; |
| 1411 |
|
} |
| 1412 |
|
|
| 1413 |
|
return -1; |
| 1414 |
|
} |
| 1415 |
|
|
| 1416 |
|
/* |
| 1417 |
|
*---------------------------------------------------------------------- |
| 1418 |
|
* |
| 1419 |
|
* LostSelection -- |
| 1420 |
|
* |
| 1421 |
|
* This procedure is invoked when a window has lost ownership of |
| 1422 |
|
* the selection and the ownership was claimed with the command |
| 1423 |
|
* "selection own". |
| 1424 |
|
* |
| 1425 |
|
* Results: |
| 1426 |
|
* None. |
| 1427 |
|
* |
| 1428 |
|
* Side effects: |
| 1429 |
|
* A Tcl script is executed; it can do almost anything. |
| 1430 |
|
* |
| 1431 |
|
*---------------------------------------------------------------------- |
| 1432 |
|
*/ |
| 1433 |
|
|
| 1434 |
|
static void |
| 1435 |
|
LostSelection(clientData) |
| 1436 |
|
ClientData clientData; /* Pointer to LostCommand structure. */ |
| 1437 |
|
{ |
| 1438 |
|
LostCommand *lostPtr = (LostCommand *) clientData; |
| 1439 |
|
Tcl_Obj *objPtr; |
| 1440 |
|
Tcl_Interp *interp; |
| 1441 |
|
|
| 1442 |
|
interp = lostPtr->interp; |
| 1443 |
|
Tcl_Preserve((ClientData) interp); |
| 1444 |
|
|
| 1445 |
|
/* |
| 1446 |
|
* Execute the command. Save the interpreter's result, if any, and |
| 1447 |
|
* restore it after executing the command. |
| 1448 |
|
*/ |
| 1449 |
|
|
| 1450 |
|
objPtr = Tcl_GetObjResult(interp); |
| 1451 |
|
Tcl_IncrRefCount(objPtr); |
| 1452 |
|
Tcl_ResetResult(interp); |
| 1453 |
|
|
| 1454 |
|
if (TkCopyAndGlobalEval(interp, lostPtr->command) != TCL_OK) { |
| 1455 |
|
Tcl_BackgroundError(interp); |
| 1456 |
|
} |
| 1457 |
|
|
| 1458 |
|
Tcl_SetObjResult(interp, objPtr); |
| 1459 |
|
Tcl_DecrRefCount(objPtr); |
| 1460 |
|
|
| 1461 |
|
Tcl_Release((ClientData) interp); |
| 1462 |
|
|
| 1463 |
|
/* |
| 1464 |
|
* Free the storage for the command, since we're done with it now. |
| 1465 |
|
*/ |
| 1466 |
|
|
| 1467 |
|
ckfree((char *) lostPtr); |
| 1468 |
|
} |
| 1469 |
|
|
| 1470 |
|
/* End of tkselect.c */ |
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