Re: [RFC][PATCH] Add change-directory() widget function

[Marlon Richert <marlon.richert@gmail.com>]

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On 20 Apr 2021, at 22:43, Bart Schaefer <schaefer@brasslantern.com> wrote:
> There seem to be a whole lot of spurious diff lines in contrib.yo in
> this patch?  What's going on there?  If the delta is that trailing
> whitespace has been removed, please don't do that.

Oh, my bad. That has been unintentional. Here’s the patch again but without the whitespace changes.


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From 25684843ae02bd7b57137a8e50c661b991dec23b Mon Sep 17 00:00:00 2001
From: Marlon Richert <marlon.richert@gmail.com>
Date: Tue, 20 Apr 2021 23:12:22 +0300
Subject: [PATCH] Add change-directory() widget function

---
 Doc/Zsh/contrib.yo             | 15 +++++++++++++++
 Functions/Zle/change-directory | 29 +++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 Functions/Zle/change-directory

diff --git a/Doc/Zsh/contrib.yo b/Doc/Zsh/contrib.yo
index 3c4fdded0..6ad59798c 100644
--- a/Doc/Zsh/contrib.yo
+++ b/Doc/Zsh/contrib.yo
@@ -2423,6 +2423,21 @@ history is restricted, so cursor motions, etc., may not pass outside of
 the pasted content.  Text assigned to tt(BUFFER) by the active widgets
 is copied back into tt(PASTED) before tt(paste-finish).
 )
+tindex(change-directory)
+item(tt(change-directory))(
+This function implements the widgets tt(cd-upward), tt(cd-backward) and
+tt(cd-forward).  They can be used, respectively, to change to the current
+directory's parent or the previous/next entry in the directory stack. They
+should be initialized as follows:
+
+example(autoload -Uz change-directory
+zle -N cd-upward   change-directory
+zle -N cd-backward change-directory
+zle -N cd-forward  change-directory
+bindkey '^[^[OA' cd-upward    # Alt-Up
+bindkey '^[^[OD' cd-backward  # Alt-Left
+bindkey '^[^[OC' cd-forward   # Alt-Right
+)
 tindex(copy-earlier-word)
 item(tt(copy-earlier-word))(
 This widget works like a combination of tt(insert-last-word) and
diff --git a/Functions/Zle/change-directory b/Functions/Zle/change-directory
new file mode 100644
index 000000000..376e4414c
--- /dev/null
+++ b/Functions/Zle/change-directory
@@ -0,0 +1,29 @@
+zle .push-line-or-edit
+case $WIDGET in
+  *-upward )
+    if [[ -o autocd ]]; then
+      BUFFER='..'
+    else
+      BUFFER='cd ..'
+    fi
+    ;;
+  *-backward )
+    if [[ -o pushdminus ]]; then
+      BUFFER='pushd -1'
+    else
+      BUFFER='pushd +1'
+    fi
+    ;;
+  *-forward )
+    if [[ -o pushdminus ]]; then
+      BUFFER='pushd +0'
+    else
+      BUFFER='pushd -0'
+    fi
+    ;;
+  * )
+    print -u2 'change-directory: widget name should end in -(up|back|for)ward'
+    return 1
+    ;;
+esac
+zle .accept-line
-- 
2.31.1


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