Highlight redirections.

Fixes zsh-users/zsh-syntax-highlighting#23.

highlighters/main/README.md

@@ -46,6 +46,7 @@ This highlighter defines the following styles:
 * `dollar-double-quoted-argument` -  dollar double quoted arguments ($foo inside "")
 * `back-double-quoted-argument` -  back double quoted arguments (\x inside "")
 * `assign` - variable assignments
+* `redirection` - redirection operators (`<`, `>`, etc)
 * `default` - parts of the buffer that do not match anything
 
 To override one of those styles, change its entry in `ZSH_HIGHLIGHT_STYLES`, for example in `~/.zshrc`:

highlighters/main/main-highlighter.zsh

@@ -55,6 +55,7 @@
 : ${ZSH_HIGHLIGHT_STYLES[dollar-double-quoted-argument]:=fg=cyan}
 : ${ZSH_HIGHLIGHT_STYLES[back-double-quoted-argument]:=fg=cyan}
 : ${ZSH_HIGHLIGHT_STYLES[assign]:=none}
+: ${ZSH_HIGHLIGHT_STYLES[redirection]:=none}
 
 # Whether the highlighter should be called or not.
 _zsh_highlight_main_highlighter_predicate()
@@ -177,7 +178,7 @@ _zsh_highlight_main_highlighter()
                         elif [[ $arg[0,1] == $histchars[0,1] || $arg[0,1] == $histchars[2,2] ]]; then
                           style=$ZSH_HIGHLIGHT_STYLES[history-expansion]
                         elif [[ $arg[1] == '<' || $arg[1] == '>' ]]; then
-                          style=$ZSH_HIGHLIGHT_STYLE[redirection]
+                          style=$ZSH_HIGHLIGHT_STYLES[redirection]
                           redirection=true
                         else
                           style=$ZSH_HIGHLIGHT_STYLES[unknown-token]
@@ -209,6 +210,8 @@ _zsh_highlight_main_highlighter()
                    style=$ZSH_HIGHLIGHT_STYLES[history-expansion]
                  elif [[ -n ${(M)ZSH_HIGHLIGHT_TOKENS_COMMANDSEPARATOR:#"$arg"} ]]; then
                    style=$ZSH_HIGHLIGHT_STYLES[commandseparator]
+                 elif [[ $arg[1] == '<' || $arg[1] == '>' ]]; then
+                   style=$ZSH_HIGHLIGHT_STYLES[redirection]
                  else
                    style=$ZSH_HIGHLIGHT_STYLES[default]
                  fi

highlighters/main/test-data/redirection.zsh

@@ -0,0 +1,38 @@
+#!/usr/bin/env zsh
+# -------------------------------------------------------------------------------------------------
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted
+# provided that the following conditions are met:
+#
+#  * Redistributions of source code must retain the above copyright notice, this list of conditions
+#    and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright notice, this list of
+#    conditions and the following disclaimer in the documentation and/or other materials provided
+#    with the distribution.
+#  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
+#    may be used to endorse or promote products derived from this software without specific prior
+#    written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -------------------------------------------------------------------------------------------------
+# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
+# vim: ft=zsh sw=2 ts=2 et
+# -------------------------------------------------------------------------------------------------
+
+# Redirection before and after the command word are implemented differently; test both.
+ZSH_HIGHLIGHT_STYLES[redirection]=$unused_highlight
+BUFFER='<<<foo echo >>&!bar'
+
+expected_region_highlight=(
+  "1 3 $ZSH_HIGHLIGHT_STYLES[redirection]" # <<<
+  "13 16 $ZSH_HIGHLIGHT_STYLES[redirection]" # >>&!
+)