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/* $Header$ */
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/*
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* tkWinClipboard.c --
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*
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* This file contains functions for managing the clipboard.
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*
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* Copyright (c) 1995-1997 Sun Microsystems, Inc.
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* Copyright (c) 1998-2000 by Scriptics Corporation.
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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: tkwinclipboard.c,v 1.1.1.1 2001/06/13 05:11:58 dtashley Exp $
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*/
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#include "tkWinInt.h"
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#include "tkSelect.h"
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static void UpdateClipboard _ANSI_ARGS_((HWND hwnd));
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/*
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*----------------------------------------------------------------------
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*
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* TkSelGetSelection --
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*
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* Retrieve the specified selection from another process. For
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* now, only fetching XA_STRING from CLIPBOARD is supported.
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* Eventually other types should be allowed.
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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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* None.
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*
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*----------------------------------------------------------------------
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*/
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int
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TkSelGetSelection(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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char *data, *destPtr;
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Tcl_DString ds;
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HGLOBAL handle;
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Tcl_Encoding encoding;
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int result, locale;
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if ((selection != Tk_InternAtom(tkwin, "CLIPBOARD"))
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|| (target != XA_STRING)
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|| !OpenClipboard(NULL)) {
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goto error;
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}
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/*
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* Attempt to get the data in Unicode form if available as this is
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* less work that CF_TEXT.
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*/
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result = TCL_ERROR;
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if (IsClipboardFormatAvailable(CF_UNICODETEXT)) {
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handle = GetClipboardData(CF_UNICODETEXT);
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if (!handle) {
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CloseClipboard();
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goto error;
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}
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data = GlobalLock(handle);
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Tcl_DStringInit(&ds);
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Tcl_UniCharToUtfDString((Tcl_UniChar *)data,
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Tcl_UniCharLen((Tcl_UniChar *)data), &ds);
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GlobalUnlock(handle);
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} else if (IsClipboardFormatAvailable(CF_TEXT)) {
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/*
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* Determine the encoding to use to convert this text.
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*/
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if (IsClipboardFormatAvailable(CF_LOCALE)) {
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handle = GetClipboardData(CF_LOCALE);
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if (!handle) {
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CloseClipboard();
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goto error;
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}
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/*
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* Get the locale identifier, determine the proper code page
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* to use, and find the corresponding encoding.
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*/
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Tcl_DStringInit(&ds);
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Tcl_DStringAppend(&ds, "cp######", -1);
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data = GlobalLock(handle);
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/*
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* Even though the documentation claims that GetLocaleInfo
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* expects an LCID, on Windows 9x it really seems to expect
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* a LanguageID.
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*/
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locale = LANGIDFROMLCID(*((int*)data));
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GetLocaleInfo(locale, LOCALE_IDEFAULTANSICODEPAGE,
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Tcl_DStringValue(&ds)+2, Tcl_DStringLength(&ds)-2);
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GlobalUnlock(handle);
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encoding = Tcl_GetEncoding(NULL, Tcl_DStringValue(&ds));
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Tcl_DStringFree(&ds);
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} else {
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encoding = NULL;
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}
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/*
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* Fetch the text and convert it to UTF.
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*/
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handle = GetClipboardData(CF_TEXT);
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if (!handle) {
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if (encoding) {
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Tcl_FreeEncoding(encoding);
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}
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CloseClipboard();
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goto error;
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}
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data = GlobalLock(handle);
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Tcl_ExternalToUtfDString(encoding, data, -1, &ds);
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GlobalUnlock(handle);
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if (encoding) {
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Tcl_FreeEncoding(encoding);
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}
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} else {
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CloseClipboard();
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goto error;
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}
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/*
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* Translate CR/LF to LF.
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*/
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data = destPtr = Tcl_DStringValue(&ds);
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while (*data) {
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if (data[0] == '\r' && data[1] == '\n') {
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data++;
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} else {
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*destPtr++ = *data++;
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}
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}
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*destPtr = '\0';
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/*
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* Pass the data off to the selection procedure.
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*/
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result = (*proc)(clientData, interp, Tcl_DStringValue(&ds));
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Tcl_DStringFree(&ds);
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CloseClipboard();
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return result;
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error:
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Tcl_AppendResult(interp, Tk_GetAtomName(tkwin, selection),
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" selection doesn't exist or form \"",
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Tk_GetAtomName(tkwin, target),
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"\" not defined", (char *) NULL);
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return TCL_ERROR;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkSetSelectionOwner --
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*
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* This function claims ownership of the specified selection.
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* If the selection is CLIPBOARD, then we empty the system
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* clipboard.
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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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* Empties the system clipboard, and claims ownership.
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*
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*----------------------------------------------------------------------
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*/
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void
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XSetSelectionOwner(display, selection, owner, time)
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Display* display;
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Atom selection;
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Window owner;
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Time time;
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{
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HWND hwnd = owner ? TkWinGetHWND(owner) : NULL;
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Tk_Window tkwin;
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/*
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* This is a gross hack because the Tk_InternAtom interface is broken.
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* It expects a Tk_Window, even though it only needs a Tk_Display.
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*/
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tkwin = (Tk_Window) TkGetMainInfoList()->winPtr;
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if (selection == Tk_InternAtom(tkwin, "CLIPBOARD")) {
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/*
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* Only claim and empty the clipboard if we aren't already the
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* owner of the clipboard.
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*/
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if (GetClipboardOwner() != hwnd) {
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UpdateClipboard(hwnd);
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}
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}
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkWinClipboardRender --
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*
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* This function supplies the contents of the clipboard in
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* response to a WM_RENDERFORMAT message.
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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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* Sets the contents of the clipboard.
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*
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*----------------------------------------------------------------------
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*/
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void
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TkWinClipboardRender(dispPtr, format)
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TkDisplay *dispPtr;
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UINT format;
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{
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TkClipboardTarget *targetPtr;
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TkClipboardBuffer *cbPtr;
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HGLOBAL handle;
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char *buffer, *p, *rawText, *endPtr;
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int length;
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Tcl_DString ds;
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for (targetPtr = dispPtr->clipTargetPtr; targetPtr != NULL;
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targetPtr = targetPtr->nextPtr) {
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if (targetPtr->type == XA_STRING)
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break;
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}
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/*
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* Count the number of newlines so we can add space for them in
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* the resulting string.
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*/
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length = 0;
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if (targetPtr != NULL) {
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for (cbPtr = targetPtr->firstBufferPtr; cbPtr != NULL;
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cbPtr = cbPtr->nextPtr) {
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length += cbPtr->length;
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for (p = cbPtr->buffer, endPtr = p + cbPtr->length;
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p < endPtr; p++) {
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if (*p == '\n') {
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length++;
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}
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}
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}
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}
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/*
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* Copy the data and change EOL characters.
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*/
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buffer = rawText = ckalloc(length + 1);
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if (targetPtr != NULL) {
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for (cbPtr = targetPtr->firstBufferPtr; cbPtr != NULL;
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cbPtr = cbPtr->nextPtr) {
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for (p = cbPtr->buffer, endPtr = p + cbPtr->length;
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p < endPtr; p++) {
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if (*p == '\n') {
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*buffer++ = '\r';
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}
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*buffer++ = *p;
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}
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}
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}
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*buffer = '\0';
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/*
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* Depending on the platform, turn the data into Unicode or the
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* system encoding before placing it on the clipboard.
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*/
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if (TkWinGetPlatformId() == VER_PLATFORM_WIN32_NT) {
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Tcl_DStringInit(&ds);
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Tcl_UtfToUniCharDString(rawText, -1, &ds);
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ckfree(rawText);
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handle = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE,
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Tcl_DStringLength(&ds)+2);
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if (!handle) {
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Tcl_DStringFree(&ds);
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return;
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}
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buffer = GlobalLock(handle);
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memcpy(buffer, Tcl_DStringValue(&ds), Tcl_DStringLength(&ds) + 2);
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GlobalUnlock(handle);
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Tcl_DStringFree(&ds);
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SetClipboardData(CF_UNICODETEXT, handle);
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} else {
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Tcl_UtfToExternalDString(NULL, rawText, -1, &ds);
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ckfree(rawText);
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handle = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE,
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Tcl_DStringLength(&ds)+1);
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if (!handle) {
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Tcl_DStringFree(&ds);
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return;
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}
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buffer = GlobalLock(handle);
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memcpy(buffer, Tcl_DStringValue(&ds), Tcl_DStringLength(&ds) + 1);
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GlobalUnlock(handle);
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Tcl_DStringFree(&ds);
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SetClipboardData(CF_TEXT, handle);
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}
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return;
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}
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/*
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*----------------------------------------------------------------------
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*
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342 |
* TkSelUpdateClipboard --
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343 |
*
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* This function is called to force the clipboard to be updated
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* after new data is added.
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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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* Clears the current contents of the clipboard.
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*
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*----------------------------------------------------------------------
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*/
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355 |
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void
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TkSelUpdateClipboard(winPtr, targetPtr)
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TkWindow *winPtr;
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TkClipboardTarget *targetPtr;
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{
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361 |
HWND hwnd = TkWinGetHWND(winPtr->window);
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362 |
UpdateClipboard(hwnd);
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}
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364 |
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365 |
/*
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366 |
*----------------------------------------------------------------------
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367 |
*
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368 |
* UpdateClipboard --
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369 |
*
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370 |
* Take ownership of the clipboard, clear it, and indicate to the
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* system the supported formats.
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372 |
*
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373 |
* Results:
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374 |
* None.
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375 |
*
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376 |
* Side effects:
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377 |
* None.
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378 |
*
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379 |
*----------------------------------------------------------------------
|
380 |
*/
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381 |
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382 |
static void
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383 |
UpdateClipboard(hwnd)
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384 |
HWND hwnd;
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{
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386 |
TkWinUpdatingClipboard(TRUE);
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387 |
OpenClipboard(hwnd);
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388 |
EmptyClipboard();
|
389 |
|
390 |
/*
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391 |
* CF_UNICODETEXT is only supported on NT, but it it is prefered
|
392 |
* when possible.
|
393 |
*/
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394 |
|
395 |
if (TkWinGetPlatformId() == VER_PLATFORM_WIN32_NT) {
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396 |
SetClipboardData(CF_UNICODETEXT, NULL);
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397 |
} else {
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398 |
SetClipboardData(CF_TEXT, NULL);
|
399 |
}
|
400 |
CloseClipboard();
|
401 |
TkWinUpdatingClipboard(FALSE);
|
402 |
}
|
403 |
|
404 |
/*
|
405 |
*--------------------------------------------------------------
|
406 |
*
|
407 |
* TkSelEventProc --
|
408 |
*
|
409 |
* This procedure is invoked whenever a selection-related
|
410 |
* event occurs.
|
411 |
*
|
412 |
* Results:
|
413 |
* None.
|
414 |
*
|
415 |
* Side effects:
|
416 |
* Lots: depends on the type of event.
|
417 |
*
|
418 |
*--------------------------------------------------------------
|
419 |
*/
|
420 |
|
421 |
void
|
422 |
TkSelEventProc(tkwin, eventPtr)
|
423 |
Tk_Window tkwin; /* Window for which event was
|
424 |
* targeted. */
|
425 |
register XEvent *eventPtr; /* X event: either SelectionClear,
|
426 |
* SelectionRequest, or
|
427 |
* SelectionNotify. */
|
428 |
{
|
429 |
if (eventPtr->type == SelectionClear) {
|
430 |
TkSelClearSelection(tkwin, eventPtr);
|
431 |
}
|
432 |
}
|
433 |
|
434 |
/*
|
435 |
*----------------------------------------------------------------------
|
436 |
*
|
437 |
* TkSelPropProc --
|
438 |
*
|
439 |
* This procedure is invoked when property-change events
|
440 |
* occur on windows not known to the toolkit. This is a stub
|
441 |
* function under Windows.
|
442 |
*
|
443 |
* Results:
|
444 |
* None.
|
445 |
*
|
446 |
* Side effects:
|
447 |
* None.
|
448 |
*
|
449 |
*----------------------------------------------------------------------
|
450 |
*/
|
451 |
|
452 |
void
|
453 |
TkSelPropProc(eventPtr)
|
454 |
register XEvent *eventPtr; /* X PropertyChange event. */
|
455 |
{
|
456 |
}
|
457 |
|
458 |
/* End of tkwinclipboard.c */
|