X-Git-Url: http://git.madism.org/?p=apps%2Fmadmutt.git;a=blobdiff_plain;f=sidebar.c;h=caa85388a5fe5b57c55a3b5aa60f1ad2672782c4;hp=e1bec5df1785696fb95bca3ffd54da31f2d545e5;hb=40fc05e11b8f95a9661e6e410a9e7b7da7824891;hpb=9ac26767ab8579e47e55640983ab453c1baa356d

diff --git a/sidebar.c b/sidebar.c
index e1bec5d..caa8538 100644
--- a/sidebar.c
+++ b/sidebar.c
@@ -1,298 +1,484 @@
 /*
+ * Copyright notice from original mutt:
  * Copyright (C) ????-2004 Justin Hibbits <jrh29@po.cwru.edu>
  * Copyright (C) 2004 Thomer M. Gil <mutt@thomer.com>
- * 
- *     This program 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 2 of the License, or
- *     (at your option) any later version.
- * 
- *     This program 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, write to the Free Software
- *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
- */ 
-
-
+ *
+ * Parts were written/modified by:
+ * Rocco Rutte <pdmef@cs.tu-berlin.de>
+ * Nico Golde <nico@ngolde.de>
+ *
+ * This file is part of mutt-ng, see http://www.muttng.org/.
+ * It's licensed under the GNU General Public License,
+ * please see the file GPL in the top level source directory.
+ */
+
+#include <lib-lib/mem.h>
+#include <lib-lib/str.h>
+#include <lib-lib/macros.h>
+
+#include <lib-ui/curses.h>
+#include <lib-ui/menu.h>
 
 #include "mutt.h"
-#include "mutt_menu.h"
-#include "mutt_curses.h"
 #include "sidebar.h"
 #include "buffy.h"
-#include <libgen.h>
 #include "keymap.h"
-#include <stdbool.h>
 
-/*BUFFY *CurBuffy = 0;*/
-static BUFFY *TopBuffy = 0;
-static BUFFY *BottomBuffy = 0;
+
+#include <libgen.h>
+#include <ctype.h>
+
+static int TopBuffy = 0;
+static int CurBuffy = 0;
 static int known_lines = 0;
+static short initialized = 0;
+static short prev_show_value;
 
-static int quick_log10(int n)
-{
-        char string[32];
-        sprintf(string, "%d", n);
-        return strlen(string);
+/* computes first entry to be shown */
+static void calc_boundaries (void) {
+  if (list_empty(Incoming))
+    return;
+  if (CurBuffy < 0 || CurBuffy >= Incoming->length)
+    CurBuffy = 0;
+  if (TopBuffy < 0 || TopBuffy >= Incoming->length)
+    TopBuffy = 0;
+
+  if (option (OPTSIDEBARNEWMAILONLY)) {
+    int i = CurBuffy;
+    TopBuffy = CurBuffy - 1;
+    while (i >= 0) {
+      if (((BUFFY*) Incoming->data[i])->new > 0)
+        TopBuffy = i;
+      i--;
+    }
+  } else if (known_lines>0)
+    TopBuffy = CurBuffy - (CurBuffy % known_lines);
+  if (TopBuffy < 0)
+    TopBuffy = 0;
 }
 
-void calc_boundaries (int menu)
+static char *shortened_hierarchy (char *box, int maxlen)
 {
-	BUFFY *tmp = Incoming;
-
-	if ( known_lines != LINES ) {
-		TopBuffy = BottomBuffy = 0;
-		known_lines = LINES;
-	}
-	for ( ; tmp->next != 0; tmp = tmp->next )
-		tmp->next->prev = tmp;
-
-	if ( TopBuffy == 0 && BottomBuffy == 0 )
-		TopBuffy = Incoming;
-	if ( BottomBuffy == 0 ) {
-		int count = LINES - 2 - (menu != MENU_PAGER);
-		BottomBuffy = TopBuffy;
-		while ( --count && BottomBuffy->next )
-			BottomBuffy = BottomBuffy->next;
-	}
-	else if ( TopBuffy == CurBuffy->next ) {
-		int count = LINES - 2 - (menu != MENU_PAGER);
-		BottomBuffy = CurBuffy;
-		tmp = BottomBuffy;
-		while ( --count && tmp->prev)
-			tmp = tmp->prev;
-		TopBuffy = tmp;
-	}
-	else if ( BottomBuffy == CurBuffy->prev ) {
-		int count = LINES - 2 - (menu != MENU_PAGER);
-		TopBuffy = CurBuffy;
-		tmp = TopBuffy;
-		while ( --count && tmp->next )
-			tmp = tmp->next;
-		BottomBuffy = tmp;
-	}
-}
-
-static char * shortened_hierarchy(char * box) {
   int dots = 0;
-  char * last_dot;
-  int i,j;
-  char * new_box;
-  for (i=0;i<strlen(box);++i)
-    if (box[i] == '.') ++dots;
-  last_dot = strrchr(box,'.');
+  char *last_dot = NULL;
+  int i, j, len = m_strlen(box);
+  char *new_box;
+
+  if (!SidebarBoundary || !*SidebarBoundary)
+    return (m_strdup(box));
+
+  for (i = 0; i < len; ++i) {
+    if (strchr (SidebarBoundary, box[i])) {
+      ++dots;
+      last_dot = &box[i];
+    }
+  }
+
   if (last_dot) {
     ++last_dot;
-    new_box = safe_malloc(strlen(last_dot)+2*dots+1);
+    new_box = p_new(char, maxlen + 1);
     new_box[0] = box[0];
-    for (i=1,j=1;i<strlen(box);++i) {
-      if (box[i] == '.') {
-        new_box[j++] = '.';
+    for (i = 1, j = 1; j < maxlen && i < len; ++i) {
+      if (strchr (SidebarBoundary, box[i])) {
+        new_box[j++] = box[i];
         new_box[j] = 0;
-        if (&box[i+1] != last_dot) {
-          new_box[j++] = box[i+1];
+        if (&box[i + 1] != last_dot || j + m_strlen(last_dot) > maxlen) {
+          new_box[j++] = box[i + 1];
           new_box[j] = 0;
         } else {
-          strcat(&new_box[j],last_dot);
+          strcat (&new_box[j], last_dot);
           break;
         }
       }
     }
     return new_box;
   }
-  return safe_strdup(box);
+  return m_strdup(box);
+}
+
+static const char* sidebar_number_format (char* dest, ssize_t destlen, char op,
+                                          const char* src, const char* fmt,
+                                          const char* ifstr, const char* elstr,
+                                          unsigned long data, format_flag flags) {
+  char tmp[SHORT_STRING];
+  BUFFY* b = (BUFFY*) Incoming->data[data];
+  int opt = flags & M_FORMAT_OPTIONAL;
+  int c = Context && !m_strcmp(Context->path, b->path);
+
+  switch (op) {
+    /* deleted */
+    case 'd':
+      if (!opt) {
+        snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
+        snprintf (dest, destlen, tmp, c ? Context->deleted : 0);
+      } else if ((c && Context->deleted == 0) || !c)
+        opt = 0;
+      break;
+    /* flagged */
+    case 'F':
+    case 'f':                   /* for compatibility */
+      if (!opt) {
+        snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
+        snprintf (dest, destlen, tmp, c ? Context->flagged : b->msg_flagged);
+      } else if ((c && Context->flagged == 0) || (!c && b->msg_flagged == 0))
+        opt = 0;
+      break;
+    /* total */
+    case 'c':                   /* for compatibility */
+    case 'm':
+      if (!opt) {
+        snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
+        snprintf (dest, destlen, tmp, c ? Context->msgcount : b->msgcount);
+      } else if ((c && Context->msgcount == 0) || (!c && b->msgcount == 0))
+        opt = 0;
+      break;
+    /* total shown, i.e. not hidden by limit */
+    case 'M':
+      if (!opt) {
+        snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
+        snprintf (dest, destlen, tmp, c ? Context->vcount : 0);
+      } else if ((c && Context->vcount == 0) || !c)
+        opt = 0;
+      break;
+    /* new */
+    case 'n':
+      if (!opt) {
+        snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
+        snprintf (dest, destlen, tmp, c ? Context->new : b->new);
+      } else if ((c && Context->new == 0) || (!c && b->new == 0))
+        opt = 0;
+      break;
+    /* unread */
+    case 'u':
+      if (!opt) {
+        snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
+        snprintf (dest, destlen, tmp, c ? Context->unread : b->msg_unread);
+      } else if ((c && Context->unread == 0) || (!c && b->msg_unread == 0))
+        opt = 0;
+      break;
+    /* tagged */
+    case 't':
+      if (!opt) {
+        snprintf (tmp, sizeof (tmp), "%%%sd", fmt);
+        snprintf (dest, destlen, tmp, c ? Context->tagged : 0);
+      } else if ((c && Context->tagged == 0) || !c)
+        opt = 0;
+      break;
+  }
+
+  if (opt)
+    mutt_FormatString (dest, destlen, ifstr, sidebar_number_format,
+                       data, M_FORMAT_OPTIONAL);
+  else if (flags & M_FORMAT_OPTIONAL)
+    mutt_FormatString (dest, destlen, elstr, sidebar_number_format,
+                       data, M_FORMAT_OPTIONAL);
+  return (src);
 }
 
-char *make_sidebar_entry(char *box, int size, int new)
+int sidebar_need_count (void) {
+  if (!option (OPTMBOXPANE) || SidebarWidth == 0 ||
+      !SidebarNumberFormat || !*SidebarNumberFormat)
+    return (0);
+  return (1);
+}
+
+/* print single item
+ * returns:
+ *      0       item was not printed ('cause of $sidebar_newmail_only)
+ *      1       item was printed
+ */
+int make_sidebar_entry (char* box, int idx, ssize_t len)
 {
-	static char *entry = 0;
-	char *c;
-	int i = 0;
-
-	c = realloc(entry, SidebarWidth + 1);
-	if ( c ) entry = c;
-	entry[SidebarWidth] = 0;
-	for (; i < SidebarWidth; entry[i++] = ' ' );
-#if USE_IMAP
-	if (ImapHomeNamespace && strlen(ImapHomeNamespace)>0) {
-    if (strncmp(box,ImapHomeNamespace,strlen(ImapHomeNamespace))==0 && strcmp(box,ImapHomeNamespace)!=0) {
-      box+=strlen(ImapHomeNamespace)+1;
+  int shortened = 0, lencnt = 0;
+  char no[SHORT_STRING], entry[SHORT_STRING];
+  int l = m_strlen(ImapHomeNamespace);
+  int l_m = m_strlen(Maildir);
+
+  if (SidebarWidth > COLS)
+    SidebarWidth = COLS;
+
+  if (option (OPTSIDEBARNEWMAILONLY) && box && Context && Context->path && 
+      m_strcmp(Context->path, box) && ((BUFFY*) Incoming->data[idx])->new == 0)
+    /* if $sidebar_newmail_only is set, don't display the
+     * box only if it's not the currently opened
+     * (i.e. always display the currently opened) */
+    return (0);
+
+  mutt_FormatString (no, len, NONULL (SidebarNumberFormat),
+                     sidebar_number_format, idx, M_FORMAT_OPTIONAL);
+  lencnt = m_strlen(no);
+  memset(&entry, ' ', sizeof(entry));
+
+  if (l > 0 && m_strncmp(box, ImapHomeNamespace, l) == 0 && 
+      m_strlen(box) > l)
+    box += l + 1; /* we're trimming the ImapHomeNamespace, the "+ 1" is for the separator */
+  else
+  if (l_m > 0 && m_strncmp(box, Maildir, l_m) == 0 && 
+      m_strlen(box) > l_m) {
+    box += l_m;
+    if (Maildir[strlen(Maildir)-1]!='/') {
+      box += 1;
     }
+  } else
+    box = basename (box);
+
+  if (option (OPTSHORTENHIERARCHY) && m_strlen(box) > len-lencnt-1) {
+    box = shortened_hierarchy (box, len-lencnt-1);
+    shortened = 1;
   }
-#endif
-  if (option(OPTSHORTENHIERARCHY)) {
-    box = shortened_hierarchy(box);
-  }
-	i = strlen(box);
-	strncpy( entry, box, i < SidebarWidth ? i :SidebarWidth );
-
-	if ( new ) 
-		sprintf(
-			entry + SidebarWidth - 5 - quick_log10(size) - quick_log10(new),
-			"% d(%d)", size, new);
-	else
-		sprintf( entry + SidebarWidth - 3 - quick_log10(size), "% d", size);
-  if (option(OPTSHORTENHIERARCHY)) {
-    free(box);
+
+  m_strcpy(entry, len - lencnt, box);
+  entry[m_strlen(entry)] = ' ';
+  memcpy(entry + (len - lencnt), no, lencnt);
+
+  addnstr (entry, len);
+
+  if (shortened)
+    p_delete(&box);
+
+  return (1);
+}
+
+/* returns folder name of currently 
+ * selected folder for <sidebar-open>
+ */
+const char* sidebar_get_current (void) {
+  if (list_empty(Incoming))
+    return (NULL);
+  return ((char*) ((BUFFY*) Incoming->data[CurBuffy])->path);
+}
+
+/* internally sets item to buf */
+void sidebar_set_current (const char* buf) {
+  int i = buffy_lookup (buf);
+  if (i >= 0) {
+    CurBuffy = i;
+    calc_boundaries();
   }
-	return entry;
 }
 
-void set_curbuffy(char buf[LONG_STRING])
-{
-  BUFFY* tmp = CurBuffy = Incoming;
+/* fix counters for a context
+ * FIXME since ctx must not be of our business, move it elsewhere
+ */
+void sidebar_set_buffystats (CONTEXT* Context) {
+  int i = 0;
+  BUFFY* tmp = NULL;
+  if (!Context || list_empty(Incoming) || (i = buffy_lookup (Context->path)) < 0)
+    return;
+  tmp = (BUFFY*) Incoming->data[i];
+  tmp->new = Context->new;
+  tmp->msg_unread = Context->unread;
+  tmp->msgcount = Context->msgcount;
+  tmp->msg_flagged = Context->flagged;
+}
 
-  if (!Incoming)
+void sidebar_draw_frames (void) {
+  ssize_t i,delim_len;
+
+  if (!option(OPTMBOXPANE) || SidebarWidth==0) 
     return;
 
-  while(1) {
-    if(!strcmp(tmp->path, buf)) {
-      CurBuffy = tmp;
-      break;
+  delim_len=m_strlen(NONULL(SidebarDelim));
+
+  /* draw vertical delimiter */
+  SETCOLOR (MT_COLOR_SIDEBAR);
+  for (i = 0; i < LINES-1; i++) {
+    move (i, SidebarWidth - delim_len);
+    if (option (OPTASCIICHARS))
+      addstr (NONULL (SidebarDelim));
+    else if (!option (OPTASCIICHARS) && !m_strcmp(SidebarDelim, "|"))
+      addch (ACS_VLINE);
+    else if ((Charset_is_utf8) && !m_strcmp(SidebarDelim, "|"))
+      addstr ("\342\224\202");
+    else
+      addstr (NONULL (SidebarDelim));
+  }
+
+  /* fill "gaps" at top+bottom */
+  SETCOLOR(MT_COLOR_STATUS);
+  for (i=0; i<SidebarWidth; i++) {
+    /*
+     * if we don't have $status_on_top and have $help, fill top
+     * gap with spaces to get bg color
+     */
+    if (option(OPTSTATUSONTOP) || option(OPTHELP)) {
+      move(0,i);
+      addch(' ');
+    }
+    /*
+      * if we don't have $status_on_top or we have $help, fill bottom
+      * gap with spaces to get bg color
+      */
+    if (!option(OPTSTATUSONTOP) || option(OPTHELP)) {
+      move(LINES-2,i);
+      addch(' ');
+    }
+  }
+  SETCOLOR (MT_COLOR_NORMAL);
+}
+
+/* actually draws something
+ * FIXME this needs some clue when to do it
+ */
+int sidebar_draw (int menu) {
+  int first_line = option (OPTSTATUSONTOP) ? 1 : option (OPTHELP) ? 1 : 0,
+      last_line = LINES - 2 + (option (OPTSTATUSONTOP) && !option (OPTHELP) ? 1 : 0),
+      i = 0,line;
+  BUFFY *tmp;
+  ssize_t delim_len = m_strlen(SidebarDelim);
+  char blank[SHORT_STRING];
+
+  known_lines=last_line-first_line;
+
+  /* initialize first time */
+  if (!initialized) {
+    prev_show_value = option (OPTMBOXPANE);
+    initialized = 1;
+  }
+
+  if (TopBuffy==0 || CurBuffy==0)
+    calc_boundaries();
+
+  /* save or restore the value SidebarWidth */
+  if (prev_show_value != option (OPTMBOXPANE)) {
+    if (!prev_show_value && option (OPTMBOXPANE)) {
+      /* after toggle: force recounting of all mail */
+      buffy_check (2);
     }
+    prev_show_value = option (OPTMBOXPANE);
+  }
+
+  if (SidebarWidth > 0 && option (OPTMBOXPANE)
+      && m_strlen(SidebarDelim) >= SidebarWidth) {
+    mutt_error (_("Value for sidebar_delim is too long. Disabling sidebar."));
+    sleep (2);
+    unset_option (OPTMBOXPANE);
+    return (0);
+  }
+
+  if (SidebarWidth == 0 || !option (OPTMBOXPANE))
+    return 0;
+
+  sidebar_draw_frames();
+
+  if (list_empty(Incoming))
+    return 0;
 
-    if(tmp->next)
-      tmp = tmp->next;
+  /* actually print items */
+  for (i = TopBuffy, line=first_line; i < Incoming->length && line < last_line; i++) {
+    tmp = (BUFFY*) Incoming->data[i];
+
+    if (i == CurBuffy)
+      SETCOLOR (MT_COLOR_INDICATOR);
+    else if (tmp->new > 0)
+      SETCOLOR (MT_COLOR_NEW);
+    else if (tmp->msg_flagged > 0)
+      SETCOLOR (MT_COLOR_FLAGGED);
     else
-      break;
+      SETCOLOR (MT_COLOR_NORMAL);
+
+    move (line, 0);
+    line += make_sidebar_entry (tmp->path, i, SidebarWidth-delim_len);
   }
-}
 
-int draw_sidebar(int menu) {
-
-	int lines = option(OPTHELP) ? 1 : 0;
-	BUFFY *tmp;
-#ifndef USE_SLANG_CURSES
-        attr_t attrs;
-#endif
-        short color_pair;
-
-        static bool initialized = false;
-        static int prev_show_value;
-        static short saveSidebarWidth;
-
-        /* initialize first time */
-        if(!initialized) {
-                prev_show_value = option(OPTMBOXPANE);
-                saveSidebarWidth = SidebarWidth;
-                if(!option(OPTMBOXPANE)) SidebarWidth = 0;
-                initialized = true;
-        }
+  SETCOLOR (MT_COLOR_NORMAL);
 
-        /* save or restore the value SidebarWidth */
-        if(prev_show_value != option(OPTMBOXPANE)) {
-                if(prev_show_value && !option(OPTMBOXPANE)) {
-                        saveSidebarWidth = SidebarWidth;
-                        SidebarWidth = 0;
-                } else if(!prev_show_value && option(OPTMBOXPANE)) {
-                        SidebarWidth = saveSidebarWidth;
-                }
-                prev_show_value = option(OPTMBOXPANE);
-        }
+  /* fill with blanks to bottom */
+  memset(&blank, ' ', sizeof(blank));
+  for (; line < last_line; line++) {
+    move (line, 0);
+    addnstr (blank, SidebarWidth-delim_len);
+  }
+  return 0;
+}
 
+/* returns index of new item with new mail or -1 */
+static int exist_next_new () {
+  int i = 0;
+  if (list_empty(Incoming))
+    return (-1);
+  i = CurBuffy + 1;
+  while (i < Incoming->length)
+    if (((BUFFY*) Incoming->data[i++])->new > 0)
+      return (i-1);
+  return (-1);
+}
 
-	if ( SidebarWidth == 0 ) return 0;
-
-        /* get attributes for divider */
-	SETCOLOR(MT_COLOR_STATUS);
-#ifndef USE_SLANG_CURSES
-        attr_get(&attrs, &color_pair, 0);
-#else
-        color_pair = attr_get();
-#endif
-        SETCOLOR(MT_COLOR_NORMAL);
-
-	/* draw the divider */
-
-	for ( ; lines < LINES-1-(menu != MENU_PAGER); lines++ ) {
-		move(lines, SidebarWidth - 1);
-		addch('|');
- #ifndef USE_SLANG_CURSES
-                mvchgat(lines, SidebarWidth - 1, 1, 0, color_pair, NULL);
- #endif
-	}
-	if ( Incoming == 0 ) return 0;
-	lines = option(OPTHELP) ? 1 : 0; /* go back to the top */
-
-	if ( known_lines != LINES || TopBuffy == 0 || BottomBuffy == 0 ) 
-		calc_boundaries(menu);
-	if ( CurBuffy == 0 ) CurBuffy = Incoming;
-
-	tmp = TopBuffy;
-
-	SETCOLOR(MT_COLOR_NORMAL);
-
-	for ( ; tmp && lines < LINES-1 - (menu != MENU_PAGER); tmp = tmp->next ) {
-		if ( tmp == CurBuffy )
-			SETCOLOR(MT_COLOR_INDICATOR);
-		else if ( tmp->msg_unread > 0 )
-			SETCOLOR(MT_COLOR_NEW);
-		else
-			SETCOLOR(MT_COLOR_NORMAL);
-
-		move( lines, 0 );
-		if ( Context && !strcmp( tmp->path, Context->path ) ) {
-			printw( "%.*s", SidebarWidth,
-				make_sidebar_entry(basename(tmp->path), Context->msgcount,
-				Context->unread));
-			tmp->msg_unread = Context->unread;
-			tmp->msgcount = Context->msgcount;
-		}
-		else
-			printw( "%.*s", SidebarWidth,
-				make_sidebar_entry(basename(tmp->path), tmp->msgcount,
-				tmp->msg_unread));
-		lines++;
-	}
-	SETCOLOR(MT_COLOR_NORMAL);
-	for ( ; lines < LINES - 1 - (menu != MENU_PAGER); lines++ ) {
-		int i = 0;
-		move( lines, 0 );
-		for ( ; i < SidebarWidth - 1; i++ )
-			addch(' ');
-	}
-	return 0;
+/* returns index of prev item with new mail or -1 */
+static int exist_prev_new () {
+  int i = 0;
+  if (list_empty(Incoming))
+    return (-1);
+  i = CurBuffy - 1;
+  while (i >= 0)
+    if (((BUFFY*) Incoming->data[i--])->new > 0)
+      return (i+1);
+  return (-1);
 }
 
-void scroll_sidebar(int op, int menu)
-{
-        if(!SidebarWidth) return;
-        if(!CurBuffy) return;
-
-	switch (op) {
-		case OP_SIDEBAR_NEXT:
-			if ( CurBuffy->next == NULL ) return;
-			CurBuffy = CurBuffy->next;
-			break;
-		case OP_SIDEBAR_PREV:
-			if ( CurBuffy == Incoming ) return;
-			{
-				BUFFY *tmp = Incoming;
-				while ( tmp->next && strcmp(tmp->next->path, CurBuffy->path) ) tmp = tmp->next;
-				CurBuffy = tmp;
-			}
-			break;
-		case OP_SIDEBAR_SCROLL_UP:
-			CurBuffy = TopBuffy;
-			if ( CurBuffy != Incoming ) {
-				calc_boundaries(menu);
-				CurBuffy = CurBuffy->prev;
-			}
-			break;
-		case OP_SIDEBAR_SCROLL_DOWN:
-			CurBuffy = BottomBuffy;
-			if ( CurBuffy->next ) {
-				calc_boundaries(menu);
-				CurBuffy = CurBuffy->next;
-			}
-			break;
-		default:
-			return;
-	}
-	calc_boundaries(menu);
-	draw_sidebar(menu);
+void sidebar_scroll (int op, int menu) {
+  int i = 0;
+
+  if (!SidebarWidth || list_empty(Incoming))
+    return;
+
+  switch (op) {
+  case OP_SIDEBAR_NEXT:
+    if (!option (OPTSIDEBARNEWMAILONLY)) {
+      if (CurBuffy + 1 == Incoming->length) {
+        mutt_error (_("You are on the last mailbox."));
+        return;
+      }
+      CurBuffy++;
+      break;
+    }                           /* the fall-through is intentional */
+  case OP_SIDEBAR_NEXT_NEW:
+    if ((i = exist_next_new ()) < 0) {
+      mutt_error (_("No next mailboxes with new mail."));
+      return;
+    }
+    else
+      CurBuffy = i;
+    break;
+  case OP_SIDEBAR_PREV:
+    if (!option (OPTSIDEBARNEWMAILONLY)) {
+      if (CurBuffy == 0) {
+        mutt_error (_("You are on the first mailbox."));
+        return;
+      }
+      CurBuffy--;
+      break;
+    }                           /* the fall-through is intentional */
+  case OP_SIDEBAR_PREV_NEW:
+    if ((i = exist_prev_new ()) < 0) {
+      mutt_error (_("No previous mailbox with new mail."));
+      return;
+    }
+    else
+      CurBuffy = i;
+    break;
+
+  case OP_SIDEBAR_SCROLL_UP:
+    if (CurBuffy == 0) {
+      mutt_error (_("You are on the first mailbox."));
+      return;
+    }
+    CurBuffy -= known_lines;
+    if (CurBuffy < 0)
+      CurBuffy = 0;
+    break;
+  case OP_SIDEBAR_SCROLL_DOWN:
+    if (CurBuffy + 1 == Incoming->length) {
+      mutt_error (_("You are on the last mailbox."));
+      return;
+    }
+    CurBuffy += known_lines;
+    if (CurBuffy >= Incoming->length)
+      CurBuffy = Incoming->length - 1;
+    break;
+  default:
+    return;
+  }
+  calc_boundaries ();
+  sidebar_draw (menu);
 }