Handle history of input line.

Added pointer to the current history item and use to walk in history.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

lib/widget/history.c

@@ -2,7 +2,7 @@
    Widgets for the Midnight Commander
 
    Copyright (C) 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
-   2004, 2005, 2006, 2007, 2009, 2010, 2011
+   2004, 2005, 2006, 2007, 2009, 2010, 2011, 2012
    The Free Software Foundation, Inc.
 
    Authors:
@@ -11,7 +11,7 @@
    Jakub Jelinek, 1995
    Andrej Borsenkow, 1996
    Norbert Warmuth, 1997
-   Andrew Borodin <aborodin@vmail.ru>, 2009, 2010
+   Andrew Borodin <aborodin@vmail.ru>, 2009, 2010, 2011, 2012
 
    This file is part of the Midnight Commander.
 
@@ -287,7 +287,7 @@ history_save (struct mc_config_t *cfg, const char *name, GList * h)
 /* --------------------------------------------------------------------------------------------- */
 
 char *
-history_show (GList ** history, Widget * widget)
+history_show (GList ** history, Widget * widget, int current)
 {
     GList *z, *hlist = NULL, *hi;
     size_t maxlen, i, count = 0;
@@ -342,7 +342,10 @@ history_show (GList ** history, Widget * widget)
     {
         /* draw list entries from bottom upto top */
         listbox_set_list (query_list, hlist);
+        if (current < 0 || (size_t) current >= count)
             listbox_select_last (query_list);
+        else
+            listbox_select_entry (query_list, count - 1 - (size_t) current);
     }
     else
     {
@@ -350,6 +353,8 @@ history_show (GList ** history, Widget * widget)
         /* revert history direction */
         hlist = g_list_reverse (hlist);
         listbox_set_list (query_list, hlist);
+        if (current > 0)
+            listbox_select_entry (query_list, current);
     }
 
     if (run_dlg (query_dlg) != B_CANCEL)

lib/widget/history.h

@@ -29,7 +29,7 @@ GList *history_load (struct mc_config_t *cfg, const char *name);
 void history_save (struct mc_config_t *cfg, const char *name, GList * h);
 /* for repositioning of history dialog we should pass widget to this
  * function, as position of history dialog depends on widget's position */
-char *history_show (GList ** history, Widget * widget);
+char *history_show (GList ** history, Widget * widget, int current);
 
 /*** inline functions ****************************************************************************/
 

lib/widget/input.c

@@ -105,7 +105,13 @@ draw_history_button (WInput * in)
     char c;
     gboolean disabled = (((Widget *) in)->options & W_DISABLED) != 0;
 
-    c = in->history->next ? (in->history->prev ? '|' : 'v') : '^';
+    if (g_list_next (in->history_current) == NULL)
+        c = '^';
+    else if (g_list_previous (in->history_current) == NULL)
+        c = 'v';
+    else
+        c = '|';
+
     widget_move (&in->widget, 0, in->field_width - HISTORY_BUTTON_WIDTH);
     tty_setcolor (disabled ? DISABLED_COLOR : in->color[WINPUTC_HISTORY]);
 
@@ -189,7 +195,7 @@ do_show_hist (WInput * in)
 
     len = get_history_length (in->history);
 
-    r = history_show (&in->history, &in->widget);
+    r = history_show (&in->history, &in->widget, g_list_position (in->history_current, in->history));
     if (r != NULL)
     {
         input_assign_text (in, r);
@@ -271,6 +277,7 @@ push_history (WInput * in, const char *text)
         in->history_changed)
     {
         in->history = list_append_unique (in->history, t);
+        in->history_current = in->history;
         in->history_changed = TRUE;
     }
     else
@@ -631,12 +638,12 @@ hist_prev (WInput * in)
     if (in->need_push)
         push_history (in, in->buffer);
 
-    prev = g_list_previous (in->history);
+    prev = g_list_previous (in->history_current);
     if (prev != NULL)
     {
-        in->history = prev;
-        in->history_changed = TRUE;
         input_assign_text (in, (char *) prev->data);
+        in->history_current = prev;
+        in->history_changed = TRUE;
         in->need_push = FALSE;
     }
 }
@@ -658,14 +665,17 @@ hist_next (WInput * in)
     if (in->history == NULL)
         return;
 
-    next = g_list_next (in->history);
+    next = g_list_next (in->history_current);
     if (next == NULL)
+    {
         input_assign_text (in, "");
+        in->history_current = in->history;
+    }
     else
     {
-        in->history = next;
-        in->history_changed = TRUE;
         input_assign_text (in, (char *) next->data);
+        in->history_current = next;
+        in->history_changed = TRUE;
         in->need_push = FALSE;
     }
 }
@@ -829,6 +839,7 @@ input_load_history (const gchar * event_group_name, const gchar * event_name,
     (void) event_name;
 
     in->history = history_load (ev->cfg, in->history_name);
+    in->history_current = in->history;
 
     if (in->init_text == NULL)
         def_text = "";
@@ -998,6 +1009,7 @@ input_new (int y, int x, const int *input_colors, int width, const char *def_tex
 
     /* prepare to history setup */
     in->history = NULL;
+    in->history_current = NULL;
     in->history_changed = FALSE;
     in->history_name = NULL;
     if ((histname != NULL) && (*histname != '\0'))
@@ -1173,12 +1185,13 @@ input_assign_text (WInput * in, const char *text)
 {
     input_free_completions (in);
     g_free (in->buffer);
-    in->buffer = g_strdup (text);       /* was in->buffer->text */
-    in->current_max_size = strlen (in->buffer) + 1;
+    in->current_max_size = strlen (text) + 1;
+    in->buffer = g_strndup (text, in->current_max_size);        /* was in->buffer->text */
     in->point = str_length (in->buffer);
     in->mark = 0;
     in->need_push = TRUE;
     in->charpoint = 0;
+    input_update (in, TRUE);
 }
 
 /* --------------------------------------------------------------------------------------------- */

lib/widget/input.h

@@ -60,6 +60,7 @@ typedef struct
     char *buffer;               /* pointer to editing buffer */
     char *history_name;         /* name of history for loading and saving */
     GList *history;             /* the history */
+    GList *history_current;     /* current history item */
     gboolean history_changed;   /* the history has changed */
     gboolean need_push;         /* need to push the current Input on hist? */
     gboolean strip_password;    /* need to strip password before placing string to history */

src/filemanager/panel.c

@@ -3000,7 +3000,7 @@ directory_history_list (WPanel * panel)
 {
     char *s;
 
-    s = history_show (&panel->dir_history, &panel->widget);
+    s = history_show (&panel->dir_history, &panel->widget, -1);
 
     if (s != NULL)
     {