patch 9.0.1921: not possible to use the jumplist like a stackv9.0.1921

Problem:  not possible to use the jumplist like a stack
Solution: Add the 'jumpoptions' setting to make the jumplist
          a stack.

Add an option for using jumplist like tag stack

related: #7738
closes: #13134

ported from NeoVim:

- https://neovim.io/doc/user/motion.html#jumplist-stack
- neovim/neovim@39094b3
- neovim/neovim#11530
- https://vi.stackexchange.com/questions/18344/how-to-change-jumplist-behavior

Based on the feedback in the previous PR, it looks like many people like
this option.

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Co-authored-by: butwerenotthereyet <58348703+butwerenotthereyet@users.noreply.github.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/runtime/doc/motion.txt b/runtime/doc/motion.txt
index c89eead634..9bdbfb4936 100644
--- a/runtime/doc/motion.txt
+++ b/runtime/doc/motion.txt
@@ -1135,7 +1135,46 @@ When you split a window, the jumplist will be copied to the new window.
 If you have included the ' item in the 'viminfo' option the jumplist will be
 stored in the viminfo file and restored when starting Vim.
 
+							*jumplist-stack*
+When 'jumpoptions' option includes "stack", the jumplist behaves like the tag
+stack.  When jumping to a new location from the middle of the jumplist, the
+locations after the current position will be discarded. With this option set
+you can move through a tree of jump locations. When going back up a branch and
+then down another branch, CTRL-O still takes you further up the tree.
+
+Given a jumplist like the following in which CTRL-O has been used to move back
+three times to location X: >
+
+     jump line  col file/text
+       2  1260    8 mark.c		<-- location X-2
+       1   685    0 eval.c		<-- location X-1
+    >  0   462   36 eval.c		<-- location X
+       1   479   39 eval.c
+       2   213    2 mark.c
+       3   181    0 mark.c
+<
+jumping to (new) location Y results in the locations after the current
+locations being removed: >
+
+     jump line  col file/text
+       3  1260    8 mark.c		<-- location X-2
+       2   685    0 eval.c		<-- location X-1
+       1   462   36 eval.c		<-- location X
+    >
+<
 
+Then, when yet another location Z is jumped to, the new location Y appears
+directly after location X in the jumplist and location X remains in the same
+position relative to the locations (X-1, X-2, etc., ...) that had been before
+it prior to the original jump from X to Y: >
+
+     jump line  col file/text
+       4  1260    8 mark.c		<-- location X-2
+       3   685    0 eval.c		<-- location X-1
+       2   462   36 eval.c		<-- location X
+       1   100    0 buffer.c	<-- location Y
+    >
+<
 CHANGE LIST JUMPS			*changelist* *change-list-jumps* *E664*
 
 When making a change the cursor position is remembered.  One position is