[w3m-dev 03553] Undo/Redo

* fm.h (Buffer): add undo
	(BufferPos): added
* funcname.tab (REDO): added
		(UNDO): added
* main.c (save_buffer_position): added
	(main): save_buffer_position
	(resetPos): added
	(undoPos): added
	(redoPos): added
* proto.h (undoPos): added
	(redoPos): added
From: Hironori SAKAMOTO <hsaka@mth.biglobe.ne.jp>

ChangeLog

@@ -1,3 +1,18 @@
+2002-12-11  Hironori SAKAMOTO <hsaka@mth.biglobe.ne.jp>
+
+	* [w3m-dev 03553] Undo/Redo
+	* fm.h (Buffer): add undo
+		(BufferPos): added
+	* funcname.tab (REDO): added
+			(UNDO): added
+	* main.c (save_buffer_position): added
+		(main): save_buffer_position
+		(resetPos): added
+		(undoPos): added
+		(redoPos): added
+	* proto.h (undoPos): added
+		(redoPos): added
+
 2002-12-11  Hironori SAKAMOTO <hsaka@mth.biglobe.ne.jp>
 
 	* [w3m-dev 03552] Re: link list
@@ -5687,4 +5702,4 @@ a	* [w3m-dev 03276] compile error on EWS4800
 	* release-0-2-1
 	* import w3m-0.2.1
 
-$Id: ChangeLog,v 1.608 2002/12/10 15:41:31 ukai Exp $
+$Id: ChangeLog,v 1.609 2002/12/10 15:51:14 ukai Exp $

fm.h

@@ -1,4 +1,4 @@
-/* $Id: fm.h,v 1.94 2002/12/06 16:50:13 ukai Exp $ */
+/* $Id: fm.h,v 1.95 2002/12/10 15:51:14 ukai Exp $ */
 /* 
  * w3m: WWW wo Miru utility
  * 
@@ -460,8 +460,18 @@ typedef struct _Buffer {
     char image_flag;
     char need_reshape;
     Anchor *submit;
+    struct _BufferPos *undo;
 } Buffer;
 
+typedef struct _BufferPos {
+    long top_linenumber;
+    long cur_linenumber;
+    short currentColumn;
+    short pos;
+    struct _BufferPos *next;
+    struct _BufferPos *prev;
+} BufferPos;
+
 typedef struct _TabBuffer {
     struct _TabBuffer *nextTab;
     struct _TabBuffer *prevTab;

funcname.tab

@@ -1,4 +1,4 @@
-# $Id: funcname.tab,v 1.18 2002/12/09 15:51:08 ukai Exp $
+# $Id: funcname.tab,v 1.19 2002/12/10 15:51:14 ukai Exp $
 # macro name	function name
 #----------------------------
 @@@		nulcmd
@@ -105,6 +105,7 @@ PREV_WORD	movLW
 PRINT		svBuf
 QUIT		qquitfm
 READ_SHELL	readsh
+REDO		redoPos
 REDRAW		rdrwSc
 REG_MARK	reMark
 REINIT		reinit
@@ -137,6 +138,7 @@ TAB_LINK	tabA
 TAB_MENU	tabMn
 TAB_MOUSE	tabMs
 TAB_RIGHT	tabR
+UNDO		undoPos
 UP		lup1
 VERSION dispVer
 VIEW		vwSrc

main.c

@@ -1,4 +1,4 @@
-/* $Id: main.c,v 1.164 2002/12/10 15:36:11 ukai Exp $ */
+/* $Id: main.c,v 1.165 2002/12/10 15:51:15 ukai Exp $ */
 #define MAINPROGRAM
 #include "fm.h"
 #include <signal.h>
@@ -98,6 +98,7 @@ int on_target = 1;
 static int add_download_list = FALSE;
 
 void set_buffer_environ(Buffer *);
+static void save_buffer_position(Buffer *buf);
 
 static void _followForm(int);
 static void _goLine(char *);
@@ -1066,6 +1067,7 @@ main(int argc, char **argv, char **envp)
 	    }
 	    else {
 		set_buffer_environ(Currentbuf);
+		save_buffer_position(Currentbuf);
 		keyPressEventProc((int)c);
 		prec_num = 0;
 		if (add_download_list) {
@@ -6367,3 +6369,72 @@ ldDL(void)
     }
 #endif
 }
+
+static void
+save_buffer_position(Buffer *buf)
+{
+    BufferPos *b = buf->undo;
+
+    if (!buf->firstLine)
+	return;
+    if (b && b->top_linenumber == TOP_LINENUMBER(buf) &&
+	     b->cur_linenumber == CUR_LINENUMBER(buf) &&
+	     b->currentColumn == buf->currentColumn &&
+	     b->pos == buf->pos)
+	return;
+    b = New(BufferPos);
+    b->top_linenumber = TOP_LINENUMBER(buf);
+    b->cur_linenumber = CUR_LINENUMBER(buf);
+    b->currentColumn = buf->currentColumn;
+    b->pos = buf->pos;
+    b->next = NULL;
+    b->prev = buf->undo;
+    if (buf->undo)
+	buf->undo->next = b;
+    buf->undo = b;
+}
+
+static void
+resetPos(BufferPos *b)
+{
+    Buffer buf;
+    Line top, cur;
+
+    top.linenumber = b->top_linenumber;
+    cur.linenumber = b->cur_linenumber;
+    buf.topLine = &top;
+    buf.currentLine = &cur;
+    buf.pos = b->pos;
+    buf.currentColumn = b->currentColumn;
+    restorePosition(Currentbuf, &buf);
+    Currentbuf->undo = b;
+    displayBuffer(Currentbuf, B_FORCE_REDRAW);
+}
+
+void
+undoPos(void)
+{
+    BufferPos *b = Currentbuf->undo;
+    int i;
+
+    if (!Currentbuf->firstLine)
+	return;
+    if (!b || !b->prev)
+	return;
+    for (i = 0; i < PREC_NUM && b->prev; i++, b = b->prev) ;
+    resetPos(b);
+}
+
+void
+redoPos(void)
+{
+    BufferPos *b = Currentbuf->undo;
+    int i;
+
+    if (!Currentbuf->firstLine)
+	return;
+    if (!b || !b->next)
+	return;
+    for (i = 0; i < PREC_NUM && b->next; i++, b = b->next) ;
+    resetPos(b);
+}

proto.h

@@ -1,4 +1,4 @@
-/* $Id: proto.h,v 1.67 2002/12/09 15:51:09 ukai Exp $ */
+/* $Id: proto.h,v 1.68 2002/12/10 15:51:15 ukai Exp $ */
 /* 
  *   This file was automatically generated by version 1.7 of cextract.
  *   Manual editing not recommended.
@@ -146,6 +146,8 @@ extern Anchor *list_menu(Buffer *buf);
 #define listMn nulcmd
 #define movlistMn nulcmd
 #endif
+extern void undoPos(void);
+extern void redoPos(void);
 
 extern int currentLn(Buffer *buf);
 extern void tmpClearBuffer(Buffer *buf);