'driver': Always bind zle-line-finish and use it instead of accept-*

Special handling for cursor imprint or partial path highlighting
is needed in more cases than accept-*. For example when accepting
a line from isearch, no accept-* widget is invoked.

The proper way is to use zle-line-finish.

Trumps #259.
Fixes #284.

highlighters/cursor/cursor-highlighter.zsh

@@ -34,15 +34,14 @@
 # Whether the cursor highlighter should be called or not.
 _zsh_highlight_cursor_highlighter_predicate()
 {
-  # accept-* may trigger removal of cursor highlighting
-  [[ $WIDGET == accept-* ]] ||
-    _zsh_highlight_cursor_moved
+  # remove cursor highlighting when the line is finished
+  [[ $WIDGET == zle-line-finish ]] || _zsh_highlight_cursor_moved
 }
 
 # Cursor highlighting function.
 _zsh_highlight_cursor_highlighter()
 {
-  [[ $WIDGET == accept-* ]] && return
+  [[ $WIDGET == zle-line-finish ]] && return
 
   _zsh_highlight_add_highlight $CURSOR $(( $CURSOR + 1 )) cursor
 }

highlighters/main/main-highlighter.zsh

@@ -62,9 +62,8 @@
 # Whether the highlighter should be called or not.
 _zsh_highlight_main_highlighter_predicate()
 {
-  # accept-* may trigger removal of path_prefix highlighting
-  [[ $WIDGET == accept-* ]] ||
-    _zsh_highlight_buffer_modified
+  # may need to remove path_prefix highlighting when the line ends
+  [[ $WIDGET == zle-line-finish ]] || _zsh_highlight_buffer_modified
 }
 
 # Helper to deal with tokens crossing line boundaries.
@@ -595,7 +594,7 @@ _zsh_highlight_main_highlighter_check_path()
 
   # If this word ends the buffer, check if it's the prefix of a valid path.
   if [[ ${BUFFER[1]} != "-" && ${#BUFFER} == $end_pos ]] &&
-     [[ $WIDGET != accept-* ]]; then
+     [[ $WIDGET != zle-line-finish ]]; then
     local -a tmp
     tmp=( ${expanded_path}*(N) )
     (( $#tmp > 0 )) && REPLY=path_prefix && return 0

highlighters/main/test-data/path_prefix2.zsh

@@ -31,7 +31,7 @@
 # Related to path_prefix.zsh
 
 BUFFER='ls /bin/s'
-WIDGET=accept-line
+WIDGET=zle-line-finish
 
 expected_region_highlight=(
   "4 9 default"    # /bin/s

zsh-syntax-highlighting.zsh

@@ -237,6 +237,12 @@ _zsh_highlight_bind_widgets()
   # Override ZLE widgets to make them invoke _zsh_highlight.
   local -U widgets_to_bind
   widgets_to_bind=(${${(k)widgets}:#(.*|orig-*|run-help|which-command|beep|set-local-history|yank)})
+
+  # Always wrap special zle-line-finish widget. This is needed to decide if the
+  # current line ends and special highlighting logic needs to be applied.
+  # E.g. remove cursor imprint, don't highlight partial paths, ...
+  widgets_to_bind+=(zle-line-finish)
+
   local cur_widget
   for cur_widget in $widgets_to_bind; do
     case $widgets[$cur_widget] in