refactor(vi-mode): remove duplicate bindkey logic and fix syntax

It wasn’t clear where I should set the `NVM_AUTOLOAD` variable. The clue was to be found in [the docs for another plugin](https://github.com/ohmyzsh/ohmyzsh/tree/master/plugins/fzf). It seems setting values need to come before Oh My Zsh is sourced.

Updated read me to reflect this, and the fact that one of the settings mentioned is specific to nvm, not this plugin.

lib/git.zsh

@@ -170,7 +170,7 @@ function git_prompt_status() {
     '\?\? '     'UNTRACKED'
     'A  '       'ADDED'
     'M  '       'ADDED'
-    'MM '       'ADDED'
+    'MM '       'MODIFIED'
     ' M '       'MODIFIED'
     'AM '       'MODIFIED'
     ' T '       'MODIFIED'

plugins/nvm/README.md

@@ -11,9 +11,11 @@ plugins=(... nvm)
 
 ## Settings
 
-- **`NVM_DIR`**: if you have installed nvm in a directory other than `$HOME/.nvm`, set and export `NVM_DIR`
-  to be the directory where you installed nvm.
-  
+If you installed nvm in a directory other than `$HOME/.nvm`, set and export `NVM_DIR` to be the directory
+where you installed nvm.
+
+These settings should go in your zshrc file, before Oh My Zsh is sourced:
+
 - **`NVM_HOMEBREW`**: if you installed nvm via Homebrew, in a directory other than `/usr/local/opt/nvm`, you
   can set `NVM_HOMEBREW` to be the directory where you installed it.
 

plugins/vi-mode/vi-mode.plugin.zsh

@@ -1,33 +1,61 @@
+# Control whether to force a redraw on each mode change.
+#
+# Resetting the prompt on every mode change can cause lag when switching modes.
+# This is especially true if the prompt does things like checking git status.
+#
+# Set to "true" to force the prompt to reset on each mode change.
+# Set to "false" to force the prompt *not* to reset on each mode change.
+#
+# (The default is not to reset, unless we're showing the mode in RPS1).
+typeset -g VI_MODE_RESET_PROMPT_ON_MODE_CHANGE
+typeset -g VI_KEYMAP=main
+
+function _vi-mode-set-cursor-shape-for-keymap() {
+  # https://vt100.net/docs/vt510-rm/DECSCUSR
+  local _shape=0
+  case "${1:-${VI_KEYMAP:-main}}" in
+    main)    _shape=6 ;; # vi insert: line
+    viins)   _shape=6 ;; # vi insert: line
+    isearch) _shape=6 ;; # inc search: line
+    command) _shape=6 ;; # read a command name
+    vicmd)   _shape=2 ;; # vi cmd: block
+    visual)  _shape=2 ;; # vi visual mode: block
+    viopp)   _shape=0 ;; # vi operation pending: blinking block
+    *)       _shape=0 ;;
+  esac
+  printf $'\e[%d q' "${_shape}"
+}
+
 # Updates editor information when the keymap changes.
 function zle-keymap-select() {
   # update keymap variable for the prompt
-  VI_KEYMAP=$KEYMAP
+  typeset -g VI_KEYMAP=$KEYMAP
 
-  zle reset-prompt
-  zle -R
+  if [[ "${VI_MODE_RESET_PROMPT_ON_MODE_CHANGE:-}" = true ]]; then
+    zle reset-prompt
+    zle -R
+  fi
+  _vi-mode-set-cursor-shape-for-keymap "${VI_KEYMAP}"
 }
-
 zle -N zle-keymap-select
 
-function vi-accept-line() {
-  VI_KEYMAP=main
-  zle accept-line
+# These "echoti" statements were originally set in lib/key-bindings.zsh
+# Not sure the best way to extend without overriding.
+function zle-line-init() {
+  typeset -g VI_KEYMAP=main
+  (( ! ${+terminfo[smkx]} )) || echoti smkx
+  _vi-mode-set-cursor-shape-for-keymap "${VI_KEYMAP}"
 }
+zle -N zle-line-init
 
-zle -N vi-accept-line
-
+function zle-line-finish() {
+  (( ! ${+terminfo[rmkx]} )) || echoti rmkx
+  _vi-mode-set-cursor-shape-for-keymap default
+}
+zle -N zle-line-finish
 
 bindkey -v
 
-# use custom accept-line widget to update $VI_KEYMAP
-bindkey -M vicmd '^J' vi-accept-line
-bindkey -M vicmd '^M' vi-accept-line
-
-# allow v to edit the command line (standard behaviour)
-autoload -Uz edit-command-line
-zle -N edit-command-line
-bindkey -M vicmd 'v' edit-command-line
-
 # allow ctrl-p, ctrl-n for navigate history (standard behaviour)
 bindkey '^P' up-history
 bindkey '^N' down-history
@@ -45,16 +73,56 @@ bindkey '^s' history-incremental-search-forward
 bindkey '^a' beginning-of-line
 bindkey '^e' end-of-line
 
+function wrap_clipboard_widgets() {
+  # NB: Assume we are the first wrapper and that we only wrap native widgets
+  # See zsh-autosuggestions.zsh for a more generic and more robust wrapper
+  local verb="$1"
+  shift
+
+  local widget
+  local wrapped_name
+  for widget in "$@"; do
+    wrapped_name="_zsh-vi-${verb}-${widget}"
+    if [ "${verb}" = copy ]; then
+      eval "
+        function ${wrapped_name}() {
+          zle .${widget}
+          printf %s \"\${CUTBUFFER}\" | clipcopy
+        }
+      "
+    else
+      eval "
+        function ${wrapped_name}() {
+          CUTBUFFER=\"\$(clippaste)\"
+          zle .${widget}
+        }
+      "
+    fi
+    zle -N "${widget}" "${wrapped_name}"
+  done
+}
+
+wrap_clipboard_widgets copy vi-yank vi-yank-eol vi-backward-kill-word vi-change-whole-line vi-delete
+wrap_clipboard_widgets paste vi-put-{before,after}
+unfunction wrap_clipboard_widgets
+
 # if mode indicator wasn't setup by theme, define default
-if [[ "$MODE_INDICATOR" == "" ]]; then
-  MODE_INDICATOR="%{$fg_bold[red]%}<%{$fg[red]%}<<%{$reset_color%}"
+if [[ -z "$MODE_INDICATOR" ]]; then
+  MODE_INDICATOR='%B%F{red}<%b<<%f'
 fi
 
 function vi_mode_prompt_info() {
+  # If we're using the prompt to display mode info, and we haven't explicitly
+  # disabled "reset prompt on mode change", then set it here.
+  #
+  # We do that here instead of the `if` statement below because the user may
+  # set RPS1/RPROMPT to something else in their custom config.
+  : "${VI_MODE_RESET_PROMPT_ON_MODE_CHANGE:=true}"
+
   echo "${${VI_KEYMAP/vicmd/$MODE_INDICATOR}/(main|viins)/}"
 }
 
 # define right prompt, if it wasn't defined by a theme
-if [[ "$RPS1" == "" && "$RPROMPT" == "" ]]; then
+if [[ -z "$RPS1" && -z "$RPROMPT" ]]; then
   RPS1='$(vi_mode_prompt_info)'
 fi