Split xhistory.c in front-end and middle-end part

[xboard.git] / xhistory.c

diff --git a/xhistory.c b/xhistory.c
index 919ea9a..bf5a26d 100644 (file)
--- a/xhistory.c
+++ b/xhistory.c
@@ -1,6 +1,7 @@
 /*
  * New (WinBoard-style) Move history for XBoard
  *
+ * Copyright 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
  * ------------------------------------------------------------------------
  *
  * GNU XBoard is free software: you can redistribute it and/or modify
@@ -23,7 +24,6 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <malloc.h>
 
 #include <X11/Intrinsic.h>
 #include <X11/StringDefs.h>
@@ -46,8 +46,9 @@
 #include <X11/Xmu/Atoms.h>
 
 #include "common.h"
-#include "frontend.h"
 #include "backend.h"
+#include "xhistory.h"
+#include "dialogs.h"
 #include "gettext.h"
 
 #ifdef ENABLE_NLS
@@ -58,59 +59,44 @@
 # define N_(s)  s
 #endif
 
-// templates for calls into back-end
-void RefreshMemoContent P((void));
-void MemoContentUpdated P((void));
+// templates for calls into back-end (= history.c; should be moved to history.h header shared with it!)
 void FindMoveByCharIndex P(( int char_index ));
 
-void AppendText P((Option *opt, char *s));
-int GenericPopUp P((Option *option, char *title, int dlgNr));
-void MarkMenu P((char *item, int dlgNr));
-void GetWidgetText P((Option *opt, char **buf));
-
+// variables in nhistory.c
 extern Option historyOptions[];
-extern Widget shells[10];
-extern Boolean shellUp[10];
 
 // ------------- low-level front-end actions called by MoveHistory back-end -----------------
 
-void HighlightMove( int from, int to, Boolean highlight )
-{
-    if(!highlight) from = to = 0;
-    XawTextSetSelection( historyOptions[0].handle, from, to ); // for lack of a better method, use selection for highighting
-}
-
-void ClearHistoryMemo()
-{
-    ClearTextWidget(&historyOptions[0]);
-}
-
-// the bold argument says 0 = normal, 1 = bold typeface
-// the colorNr argument says 0 = font-default, 1 = gray
-int AppendToHistoryMemo( char * text, int bold, int colorNr )
+void
+HighlightMove (int from, int to, Boolean highlight)
 {
-    Arg args[10];
-    char *s;
-    GetWidgetText(&historyOptions[0], &s);
-    AppendText(&historyOptions[0], text); // for now ignore bold & color stuff, as Xaw cannot handle that
-    return strlen(s);
+    if(highlight)
+       XawTextSetSelection( historyOptions[0].handle, from, to ); // for lack of a better method, use selection for highighting
 }
 
-void ScrollToCurrent(int caretPos)
+void
+ScrollToCurrent (int caretPos)
 {
     Arg args[10];
     char *s;
+    int len;
     GetWidgetText(&historyOptions[0], &s);
-    if(caretPos < 0) caretPos = strlen(s);
-    XtSetArg(args[0], XtNdisplayCaret, False);
-    XtSetArg(args[1], XtNinsertPosition, caretPos); // this triggers scrolling in Xaw
+    len = strlen(s);
+    if(caretPos < 0 || caretPos > len) caretPos = len;
+    if(caretPos > len-30) { // scroll to end, which causes no flicker
+      static XEvent event;
+      XtCallActionProc(historyOptions[0].handle, "end-of-file", &event, NULL, 0);
+      return;
+    }
+    // the following leads to a very annoying flicker, even when no scrolling is done at all.
+    XtSetArg(args[0], XtNinsertPosition, caretPos); // this triggers scrolling in Xaw
+    XtSetArg(args[1], XtNdisplayCaret, False);
     XtSetValues(historyOptions[0].handle, args, 2);
 }
 
 
 // ------------------------------ callbacks --------------------------
 
-char *historyText;
 char historyTranslations[] =
 "<Btn3Down>: select-start() \n \
 <Btn3Up>: extend-end() SelectMove() \n";
@@ -124,52 +110,3 @@ SelectMove (Widget w, XEvent * event, String * params, Cardinal * nParams)
        FindMoveByCharIndex( index ); // [HGM] also does the actual moving to it, now
 }
 
-Option historyOptions[] = {
-{ 0xD, 200, 400, NULL, (void*) &historyText, "", NULL, TextBox, "" },
-{   0,  2,    0, NULL, (void*) NULL, "", NULL, EndMark , "" }
-};
-
-// ------------ standard entry points into MoveHistory code -----------
-
-Boolean MoveHistoryIsUp()
-{
-    return shellUp[7];
-}
-
-Boolean MoveHistoryDialogExists()
-{
-    return shells[7] != NULL;
-}
-
-void HistoryPopUp()
-{
-    if(GenericPopUp(historyOptions, _("Move list"), 7))
-       XtOverrideTranslations(historyOptions[0].handle, XtParseTranslationTable(historyTranslations));
-    MarkMenu("menuView.Show Move History", 7);
-}
-
-void
-HistoryShowProc(w, event, prms, nprms)
-     Widget w;
-     XEvent *event;
-     String *prms;
-     Cardinal *nprms;
-{
-  if (!shellUp[7]) {
-    ASSIGN(historyText, "");
-    HistoryPopUp();
-    RefreshMemoContent();
-    MemoContentUpdated();
-  } else PopDown(7);
-  ToNrEvent(currentMove);
-}
-
-// duplicate of code in winboard.c, so an move to back-end!
-void
-HistorySet( char movelist[][2*MOVE_LEN], int first, int last, int current )
-{
-    MoveHistorySet( movelist, first, last, current, pvInfoList );
-
-    EvalGraphSet( first, last, current, pvInfoList );
-}
-