From d0656b2b38fedc0780dc53f3d42c5b4dbc96fa97 Mon Sep 17 00:00:00 2001
From: Thomas Roessler <roessler@does-not-exist.org>
Date: Tue, 31 Aug 1999 19:11:53 +0000
Subject: [PATCH] Adding a <parent-message> function. From Roland Rosenfeld
 <roland@spinnaker.rhein.de>.

---
 OPS                  |  1 +
 curs_main.c          | 17 +++++++++++++++++
 doc/manual.sgml.head |  1 +
 doc/manual.sgml.tail |  2 ++
 functions.h          |  4 ++--
 protos.h             |  1 +
 thread.c             | 24 ++++++++++++++++++++++++
 7 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/OPS b/OPS
index 23a60fee..997488c8 100644
--- a/OPS
+++ b/OPS
@@ -98,6 +98,7 @@ OP_MAIN_NEXT_SUBTHREAD "jump to the next subthread"
 OP_MAIN_NEXT_THREAD "jump to the next thread"
 OP_MAIN_NEXT_UNDELETED "move to the next undeleted message"
 OP_MAIN_NEXT_UNREAD "jump to the next unread message"
+OP_MAIN_PARENT_MESSAGE "jump to parent message in thread"
 OP_MAIN_PREV_THREAD "jump to previous thread"
 OP_MAIN_PREV_SUBTHREAD "jump to previous subthread"
 OP_MAIN_PREV_UNDELETED "move to the last undelete message"
diff --git a/curs_main.c b/curs_main.c
index fcf83640..9f26a0f8 100644
--- a/curs_main.c
+++ b/curs_main.c
@@ -1310,6 +1310,23 @@ int mutt_index_menu (void)
 	  menu->redraw = REDRAW_MOTION;
 	break;
 
+      case OP_MAIN_PARENT_MESSAGE:
+
+	CHECK_MSGCOUNT;
+
+	if ((menu->current = mutt_parent_message (Context, CURHDR)) < 0)
+	{
+	  menu->current = menu->oldcurrent;
+	}
+	else if (menu->menu == MENU_PAGER)
+        {
+          op = OP_DISPLAY_MESSAGE;
+          continue;
+        }
+        else
+          menu->redraw = REDRAW_MOTION;
+	break;
+
       case OP_MAIN_SET_FLAG:
       case OP_MAIN_CLEAR_FLAG:
 
diff --git a/doc/manual.sgml.head b/doc/manual.sgml.head
index 0813a052..0d7ed08a 100644
--- a/doc/manual.sgml.head
+++ b/doc/manual.sgml.head
@@ -304,6 +304,7 @@ ESC r   read-subthread          mark the current subthread as read
 ESC t   tag-thread              toggle the tag on the current thread
 ESC v	collapse-thread		toggle collapse for the current thread
 ESC V	collapse-all		toggle collapse for all threads
+P       parent-message          jump to parent message in thread
 </verb></tscreen>
 
 <bf/Note:/ Collapsing a thread displays only the first message
diff --git a/doc/manual.sgml.tail b/doc/manual.sgml.tail
index 886d4680..6a177d53 100644
--- a/doc/manual.sgml.tail
+++ b/doc/manual.sgml.tail
@@ -80,6 +80,7 @@ next-subthread         ESC n   jump to the next subthread
 next-thread               ^N   jump to the next thread
 next-undeleted             j   move to the next undeleted message
 next-unread        not bound   jump to the next unread message
+parent-message             P   jump to parent message in thread
 pipe-message               |   pipe message/attachment to a shell command
 previous-new         ESC TAB   jump to the previous new message
 previous-page              Z   move to the previous page
@@ -151,6 +152,7 @@ next-subthread         ESC n   jump to the next subthread
 next-thread               ^N   jump to the next thread
 next-undeleted             j   move to the next undeleted message
 next-unread        not bound   jump to the next unread message
+parent-message             P   jump to parent message in thread
 pipe-message               |   pipe message/attachment to a shell command
 previous-line      BackSpace   scroll up one line
 previous-entry             K   move to the previous entry
diff --git a/functions.h b/functions.h
index 4b5ec6c3..2056deac 100644
--- a/functions.h
+++ b/functions.h
@@ -127,7 +127,7 @@ struct binding_t OpMain[] = {
   { "previous-new",		OP_MAIN_PREV_NEW,		"\033\t" },
   { "next-unread",		OP_MAIN_NEXT_UNREAD,		NULL },
   { "previous-unread",		OP_MAIN_PREV_UNREAD,		NULL },
-
+  { "parent-message",		OP_MAIN_PARENT_MESSAGE,		"P" },
 
 
 #ifdef _PGPPATH
@@ -210,7 +210,7 @@ struct binding_t OpPager[] = {
   { "half-up",		OP_HALF_UP,			NULL },
   { "half-down",	OP_HALF_DOWN,			NULL },
   { "previous-line",	OP_PREV_LINE,			NULL },
-
+  { "parent-message",	OP_MAIN_PARENT_MESSAGE,		"P" },
 
 
 
diff --git a/protos.h b/protos.h
index 0c921eed..b3aa98a5 100644
--- a/protos.h
+++ b/protos.h
@@ -215,6 +215,7 @@ int mutt_compose_attachment (BODY *a);
 int mutt_decode_save_attachment (FILE *, BODY *, char *, int, int);
 int mutt_display_message (HEADER *h);
 int mutt_edit_attachment(BODY *);
+int mutt_parent_message (CONTEXT *, HEADER *);
 int mutt_prepare_edit_message(CONTEXT *, HEADER *, HEADER *);
 #define mutt_enter_fname(A,B,C,D,E) _mutt_enter_fname(A,B,C,D,E,0,NULL,NULL)
 int _mutt_enter_fname (const char *, char *, size_t, int *, int, int, char ***, int *);
diff --git a/thread.c b/thread.c
index 9b6fdeac..0fdffecc 100644
--- a/thread.c
+++ b/thread.c
@@ -705,6 +705,30 @@ int _mutt_aside_thread (HEADER *hdr, short dir, short subthreads)
   return (tmp->virtual);
 }
 
+int mutt_parent_message (CONTEXT *ctx, HEADER *hdr)
+{
+  if ((Sort & SORT_MASK) != SORT_THREADS)
+  {
+    mutt_error _("Threading is not enabled.");
+    return (hdr->virtual);
+  }
+  if (hdr->parent)
+  {
+    while ((hdr = hdr->parent))
+    {
+      if (!ctx->pattern || hdr->limited)
+	return (hdr->virtual);
+    }
+    mutt_error _("Parent message is not visible in limited view");
+    return -1;
+  }
+  else
+  {
+    mutt_error _("Parent message is not available.");
+    return -1;
+  }
+}
+
 void mutt_set_virtual (CONTEXT *ctx)
 {
   int i;
-- 
2.40.0