From 152c3ff975fe90f65cf10f081e7741aea3e0a6dc Mon Sep 17 00:00:00 2001
From: hobbs <hobbs>
Date: Fri, 5 Apr 2002 08:41:07 +0000
Subject: 	* generic/tkInt.h: added TK_XIM_SPOT #define (default 1). 
 Added XFontSet attribute to TkDisplay when TK_XIM_SPOT is true. 	*
 generic/tkEvent.c (Tk_HandleEvent): made sure inputContexts are 	not
 getting created on DestroyNotify events (for dead windows). 	Added
 over-the-spot support if TK_XIM_SPOT is defined (default). 	The is the
 nicer XIM behavior, but uses a bit more memory.

---
 generic/tkEvent.c | 55 ++++++++++++++++++++++++++++++++++++++++++++-----------
 generic/tkInt.h   | 20 ++++++++++++++++----
 2 files changed, 60 insertions(+), 15 deletions(-)

diff --git a/generic/tkEvent.c b/generic/tkEvent.c
index 366ba86..9ad96d1 100644
--- a/generic/tkEvent.c
+++ b/generic/tkEvent.c
@@ -11,7 +11,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkEvent.c,v 1.8 2000/06/03 08:58:16 hobbs Exp $
+ * RCS: @(#) $Id: tkEvent.c,v 1.9 2002/04/05 08:41:07 hobbs Exp $
  */
 
 #include "tkPort.h"
@@ -749,18 +749,51 @@ Tk_HandleEvent(eventPtr)
      * Pass the event to the input method(s), if there are any, and
      * discard the event if the input method(s) insist.  Create the
      * input context for the window if it hasn't already been done
-     * (XFilterEvent needs this context).
+     * (XFilterEvent needs this context).  XIM is only ever enabled on
+     * Unix, but this hasn't been factored out of the generic code yet.
      */
-    if (winPtr->dispPtr->useInputMethods) {
-	if (!(winPtr->flags & TK_CHECKED_IC)) {
-	    if (winPtr->dispPtr->inputMethod != NULL) {
-		winPtr->inputContext = XCreateIC(
-		    winPtr->dispPtr->inputMethod, XNInputStyle,
-		    XIMPreeditNothing|XIMStatusNothing,
-		    XNClientWindow, winPtr->window,
-		    XNFocusWindow, winPtr->window, NULL);
-	    }
+    dispPtr = winPtr->dispPtr;
+    if ((dispPtr->useInputMethods)) {
+	if (!(winPtr->flags & (TK_CHECKED_IC|TK_ALREADY_DEAD))) {
 	    winPtr->flags |= TK_CHECKED_IC;
+	    if (dispPtr->inputMethod != NULL) {
+#if TK_XIM_SPOT
+		XVaNestedList preedit_attr;
+		XPoint spot = {0, 0};
+
+		if (dispPtr->inputXfs == NULL) {
+		    /*
+		     * We only need to create one XFontSet
+		     */
+		    char      **missing_list;
+		    int       missing_count;
+		    char      *def_string;
+
+		    dispPtr->inputXfs = XCreateFontSet(dispPtr->display,
+			    "-*-*-*-R-Normal--14-130-75-75-*-*",
+			    &missing_list, &missing_count, &def_string);
+		    if (missing_count > 0) {
+			XFreeStringList(missing_list);
+		    }
+		}
+
+		preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot,
+			XNFontSet, dispPtr->inputXfs, NULL);
+		winPtr->inputContext = XCreateIC(dispPtr->inputMethod,
+			XNInputStyle, XIMPreeditPosition | XIMStatusNothing,
+			XNClientWindow, winPtr->window,
+			XNFocusWindow, winPtr->window,
+			XNPreeditAttributes, preedit_attr,
+			NULL);
+		XFree(preedit_attr);
+#else
+		winPtr->inputContext = XCreateIC(dispPtr->inputMethod,
+			XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
+			XNClientWindow, winPtr->window,
+			XNFocusWindow, winPtr->window,
+			NULL);
+#endif
+	    }
 	}
 	if (XFilterEvent(eventPtr, None)) {
 	    goto done;
diff --git a/generic/tkInt.h b/generic/tkInt.h
index 30772bc..44c9f67 100644
--- a/generic/tkInt.h
+++ b/generic/tkInt.h
@@ -11,7 +11,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: $Id: tkInt.h,v 1.42 2002/02/22 02:41:16 hobbs Exp $ 
+ * RCS: $Id: tkInt.h,v 1.43 2002/04/05 08:41:07 hobbs Exp $ 
  */
 
 #ifndef _TKINT
@@ -82,6 +82,16 @@ typedef struct TkCursor {
 } TkCursor;
 
 /*
+ * This defines whether we should try to use XIM over-the-spot style
+ * input.  Allow users to override it.  It is a much more elegant use
+ * of XIM, but uses a bit more memory.
+ */
+
+#ifndef TK_XIM_SPOT
+#   define TK_XIM_SPOT	1
+#endif
+
+/*
  * One of the following structures is maintained for each display
  * containing a window managed by Tk.  In part, the structure is 
  * used to store thread-specific data, since each thread will have 
@@ -456,6 +466,9 @@ typedef struct TkDisplay {
 
 #ifdef TK_USE_INPUT_METHODS
     XIM inputMethod;		/* Input method for this display */
+#if TK_XIM_SPOT
+    XFontSet inputXfs;		/* XFontSet cached for over-the-spot XIM. */
+#endif
 #endif /* TK_USE_INPUT_METHODS */
     Tcl_HashTable winTable;	/* Maps from X window ids to TkWindow ptrs. */
 
@@ -481,6 +494,7 @@ typedef struct TkDisplay {
     long deletionEpoch;		/* Incremented by window deletions */
 } TkDisplay;
 
+
 /*
  * One of the following structures exists for each error handler
  * created by a call to Tk_CreateErrorHandler.  The structure
@@ -517,8 +531,6 @@ typedef struct TkErrorHandler {
 } TkErrorHandler;
 
 
-
-
 /*
  * One of the following structures exists for each event handler
  * created by calling Tk_CreateEventHandler.  This information
@@ -700,7 +712,7 @@ typedef struct TkWindow {
 				 * declared for this window, or
 				 * NULL if none. */
 #ifdef TK_USE_INPUT_METHODS
-    XIC inputContext;		/* Input context (for input methods). */
+    XIC inputContext;		/* XIM input context. */
 #endif /* TK_USE_INPUT_METHODS */
 
     /*
-- 
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