X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=history.c;fp=history.c;h=4598799f2952ebf84173e1a7c7e02fe3f46040ec;hb=f1fbc14f88e6dfef22020dc193f3b4805952778c;hp=0000000000000000000000000000000000000000;hpb=3d14671eb68a945653366a390e7e27b5eaee9c22;p=xboard.git

diff --git a/history.c b/history.c
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+/*
+ * Move history for WinBoard
+ *
+ * Author: Alessandro Scotti (Dec 2005)
+ * back-end part split off by HGM
+ *
+ * Copyright 2005 Alessandro Scotti
+ *
+ * ------------------------------------------------------------------------
+ *
+ * GNU XBoard is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU XBoard is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/. 
+ *
+ * ------------------------------------------------------------------------
+ ** See the file ChangeLog for a revision history.  */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <string.h>
+
+#include "common.h"
+#include "frontend.h"
+#include "backend.h"
+
+/* templates for low-level front-end tasks (requiring platform-dependent implementation) */
+void ClearHistoryMemo P((void));                                   // essential
+int AppendToHistoryMemo P(( char * text, int bold, int colorNr )); // essential (coloring / styling optional)
+void HighlightMove P(( int from, int to, Boolean highlight ));     // optional (can be dummy)
+void ScrollToCurrent P((int caretPos));                            // optional (can be dummy)
+
+/* templates for front-end entry point to allow inquiring about front-end state */
+Boolean MoveHistoryDialogExists P((void));
+Boolean MoveHistoryIsUp P((void));
+
+/* Module globals */
+typedef char MoveHistoryString[ MOVE_LEN*2 ];
+
+static int lastFirst = 0;
+static int lastLast = 0;
+static int lastCurrent = -1;
+
+static char lastLastMove[ MOVE_LEN ];
+
+static MoveHistoryString * currMovelist;
+static ChessProgramStats_Move * currPvInfo;
+static int currFirst = 0;
+static int currLast = 0;
+static int currCurrent = -1;
+
+typedef struct {
+    int memoOffset;
+    int memoLength;
+} HistoryMove;
+
+static HistoryMove histMoves[ MAX_MOVES ];
+
+/* Note: in the following code a "Memo" is a Rich Edit control (it's Delphi lingo) */
+
+// back-end after replacing Windows data-types by equivalents
+static Boolean OnlyCurrentPositionChanged()
+{
+    Boolean result = FALSE;
+
+    if( lastFirst >= 0 &&
+        lastLast >= lastFirst &&
+        lastCurrent >= lastFirst && 
+        currFirst == lastFirst &&
+        currLast == lastLast &&
+        currCurrent >= 0 &&
+        TRUE )
+    {
+        result = TRUE;
+
+        /* Special case: last move changed */
+        if( currCurrent == currLast-1 ) {
+            if( strcmp( currMovelist[currCurrent], lastLastMove ) != 0 ) {
+                result = FALSE;
+            }
+        }
+    }
+
+    return result;
+}
+
+// back-end, after replacing Windows data types
+static Boolean OneMoveAppended()
+{
+    Boolean result = FALSE;
+
+    if( lastCurrent >= 0 && lastCurrent >= lastFirst && lastLast >= lastFirst &&
+        currCurrent >= 0 && currCurrent >= currFirst && currLast >= currFirst &&
+        lastFirst == currFirst &&
+        lastLast == (currLast-1) &&
+        lastCurrent == (currCurrent-1) &&
+        currCurrent == (currLast-1) &&
+        TRUE )
+    {
+        result = TRUE;
+    }
+
+    return result;
+}
+
+// back-end, now that color and font-style are passed as numbers
+static void AppendMoveToMemo( int index )
+{
+    char buf[64];
+
+    if( index < 0 || index >= MAX_MOVES ) {
+        return;
+    }
+
+    buf[0] = '\0';
+
+    /* Move number */
+    if( (index % 2) == 0 ) {
+        sprintf( buf, "%d.%s ", (index / 2)+1, index & 1 ? ".." : "" );
+        AppendToHistoryMemo( buf, 1, 0 ); // [HGM] 1 means bold, 0 default color
+    }
+
+    /* Move text */
+    strcpy( buf, SavePart( currMovelist[index] ) );
+    strcat( buf, " " );
+
+    histMoves[index].memoOffset = AppendToHistoryMemo( buf, 0, 0 );
+    histMoves[index].memoLength = strlen(buf)-1;
+
+    /* PV info (if any) */
+    if( appData.showEvalInMoveHistory && currPvInfo[index].depth > 0 ) {
+        sprintf( buf, "{%s%.2f/%d} ", 
+            currPvInfo[index].score >= 0 ? "+" : "",
+            currPvInfo[index].score / 100.0,
+            currPvInfo[index].depth );
+
+        AppendToHistoryMemo( buf, 0, 1); // [HGM] 1 means gray
+    }
+}
+
+// back-end
+void RefreshMemoContent()
+{
+    int i;
+
+    ClearHistoryMemo();
+
+    for( i=currFirst; i<currLast; i++ ) {
+        AppendMoveToMemo( i );
+    }
+}
+
+// back-end part taken out of HighlightMove to determine character positions
+static void DoHighlight(int index, int onoff)
+{
+    if( index >= 0 && index < MAX_MOVES ) {
+        HighlightMove( histMoves[index].memoOffset, 
+            histMoves[index].memoOffset + histMoves[index].memoLength, onoff );
+    }
+}
+
+// back-end, now that a wrapper is provided for the front-end code to do the actual scrolling
+void MemoContentUpdated()
+{
+    int caretPos;
+
+    DoHighlight( lastCurrent, FALSE );
+    DoHighlight( currCurrent, TRUE );
+
+    lastFirst = currFirst;
+    lastLast = currLast;
+    lastCurrent = currCurrent;
+    lastLastMove[0] = '\0';
+
+    if( lastLast > 0 ) {
+        strcpy( lastLastMove, SavePart( currMovelist[lastLast-1] ) );
+    }
+
+    /* Deselect any text, move caret to end of memo */
+    if( currCurrent >= 0 ) {
+        caretPos = histMoves[currCurrent].memoOffset + histMoves[currCurrent].memoLength;
+    }
+    else {
+        caretPos = -1;
+    }
+
+    ScrollToCurrent(caretPos);
+}
+
+// back-end. Must be called as double-click call-back on move-history text edit
+void FindMoveByCharIndex( int char_index )
+{
+    int index;
+
+    for( index=currFirst; index<currLast; index++ ) {
+        if( char_index >= histMoves[index].memoOffset &&
+            char_index <  (histMoves[index].memoOffset + histMoves[index].memoLength) )
+        {
+            ToNrEvent( index + 1 ); // moved here from call-back
+        }
+    }
+}
+
+// back-end. In WinBoard called by call-back, but could be called directly by SetIfExists?
+void UpdateMoveHistory()
+{
+        /* Update the GUI */
+        if( OnlyCurrentPositionChanged() ) {
+            /* Only "cursor" changed, no need to update memo content */
+        }
+        else if( OneMoveAppended() ) {
+            AppendMoveToMemo( currCurrent );
+        }
+        else {
+            RefreshMemoContent();
+        }
+
+        MemoContentUpdated();
+}
+
+// back-end
+void MoveHistorySet( char movelist[][2*MOVE_LEN], int first, int last, int current, ChessProgramStats_Move * pvInfo )
+{
+    /* [AS] Danger! For now we rely on the movelist parameter being a static variable! */
+
+    currMovelist = movelist;
+    currFirst = first;
+    currLast = last;
+    currCurrent = current;
+    currPvInfo = pvInfo;
+
+    if(MoveHistoryDialogExists())
+        UpdateMoveHistory(); // [HGM] call this directly, in stead of through call-back
+}
+