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 zsh-users#259.
Fixes zsh-users#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
 
   region_highlight+=("$CURSOR $(( $CURSOR + 1 )) $ZSH_HIGHLIGHT_STYLES[cursor]")
 }

highlighters/main/main-highlighter.zsh

@@ -60,9 +60,8 @@
 # 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.
@@ -486,7 +485,7 @@ _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 )) && style_override=path_prefix && return 0

highlighters/main/test-data/path_prefix2.zsh

@@ -32,7 +32,7 @@
 
 ZSH_HIGHLIGHT_STYLES[path_prefix]=$unused_highlight
 BUFFER='ls /bin/s'
-WIDGET=accept-line
+WIDGET=zle-line-finish
 
 expected_region_highlight=(
   "4 9 ${(q-)ZSH_HIGHLIGHT_STYLES[default]}"    # /bin/s

zsh-syntax-highlighting.zsh

@@ -308,6 +308,11 @@ _zsh_highlight_bind_widgets || {
   return 1
 }
 
+# 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, ...
+_zsh_highlight_set_or_wrap_special_zle_widget zle-line-finish
+
 # Resolve highlighters directory location.
 _zsh_highlight_load_highlighters "${ZSH_HIGHLIGHT_HIGHLIGHTERS_DIR:-${${0:A}:h}/highlighters}" || {
   echo 'zsh-syntax-highlighting: failed loading highlighters, exiting.' >&2