v0.4.2

Fixes/support older versions

CHANGELOG.md

@@ -1,14 +1,25 @@
 # Changelog
 
+## v0.4.2
+- Fix bug in zsh versions older than 5.0.8 (#296)
+- Officially support back to zsh v4.3.11
+
+## v0.4.1
+- Switch to [[ and (( conditionals instead of [ (#257)
+- Avoid warnnestedvar warnings with `typeset -g` (#275)
+- Replace tabs with spaces in yaml (#268)
+- Clean up and fix escaping of special characters (#267)
+- Add `emacs-forward-word` to default list of partial accept widgets (#246)
+
 ## v0.4.0
 - High-level integration tests using RSpec and tmux
 - Add continuous integration with Circle CI
-- Experimental support for asynchronous suggestions (#)
-- Fix problems with multi-line suggestions (#)
+- Experimental support for asynchronous suggestions (#170)
+- Fix problems with multi-line suggestions (#225)
 - Optimize case where manually typing in suggestion
-- Avoid wrapping any zle-* widgets (#)
+- Avoid wrapping any zle-* widgets (#206)
 - Remove support for deprecated options from v0.0.x
-- Handle history entries that begin with dashes (#)
+- Handle history entries that begin with dashes
 - Gracefully handle being sourced multiple times (#126)
 - Add enable/disable/toggle widgets to disable/enable suggestions (#219)
 

README.md

@@ -11,12 +11,14 @@ It suggests commands as you type, based on command history.
 
 ## Installation
 
+Requirements: Zsh v4.3.11 or later
+
 ### Manual
 
 1. Clone this repository somewhere on your machine. This guide will assume `~/.zsh/zsh-autosuggestions`.
 
     ```sh
-    git clone git://github.com/zsh-users/zsh-autosuggestions ~/.zsh/zsh-autosuggestions
+    git clone https://github.com/zsh-users/zsh-autosuggestions ~/.zsh/zsh-autosuggestions
     ```
 
 2. Add the following to your `.zshrc`:
@@ -33,7 +35,7 @@ It suggests commands as you type, based on command history.
 1. Clone this repository into `$ZSH_CUSTOM/plugins` (by default `~/.oh-my-zsh/custom/plugins`)
 
     ```sh
-    git clone git://github.com/zsh-users/zsh-autosuggestions $ZSH_CUSTOM/plugins/zsh-autosuggestions
+    git clone https://github.com/zsh-users/zsh-autosuggestions $ZSH_CUSTOM/plugins/zsh-autosuggestions
     ```
 
 2. Add the plugin to the list of plugins for Oh My Zsh to load:
@@ -44,6 +46,39 @@ It suggests commands as you type, based on command history.
 
 3. Start a new terminal session.
 
+### Arch Linux via the AUR
+1. Install the [`zsh-autosuggestions`](https://aur.archlinux.org/packages/zsh-autosuggestions/) or the [`zsh-autosuggestions-git`](https://aur.archlinux.org/packages/zsh-autosuggestions-git/) packages from the [AUR](https://wiki.archlinux.org/index.php/Arch_User_Repository).
+
+    ```sh
+    pacaur -S zsh-autosuggestions
+    ```
+    or
+    ```
+    pacaur -S zsh-autosuggestions-git
+    ```
+
+2. Add the following to your `.zshrc`:
+
+    ```sh
+    source /usr/share/zsh/plugins/zsh-autosuggestions/zsh-autosuggestions.zsh
+    ```
+
+3. Start a new terminal session.
+
+### macOS via Homebrew
+1. Install the `zsh-autosuggestions` package using [Homebrew](https://brew.sh/).
+
+    ```sh
+    brew install zsh-autosuggestions
+    ```
+
+2. Add the following to your `.zshrc`:
+
+    ```sh
+    source /usr/local/share/zsh-autosuggestions/zsh-autosuggestions.zsh
+    ```
+
+3. Start a new terminal session.
 
 ## Usage
 

VERSION

@@ -1 +1 @@
-v0.4.0
+v0.4.2

circle.yml

@@ -1,12 +1,12 @@
 machine:
   environment:
-    ZSH_VERSIONS: 5.0.8 5.1.1 5.2 5.3.1
+    ZSH_VERSIONS: zsh-dev/4.3.11 zsh/5.0.2 zsh/5.0.8 zsh/5.1.1 zsh/5.2 zsh/5.3.1 zsh/5.4.2
 
 dependencies:
   pre:
-    - for v in $(echo $ZSH_VERSIONS | awk "{ for (i=$((1+CIRCLE_NODE_INDEX));i<=NF;i+=$CIRCLE_NODE_TOTAL) print \$i }"); do wget https://sourceforge.net/projects/zsh/files/zsh/$v/zsh-$v.tar.gz && tar xzf zsh-$v.tar.gz && cd zsh-$v && ./configure && sudo make install || exit 1; done
+    - for v in $(echo $ZSH_VERSIONS | awk "{ for (i=$((1+CIRCLE_NODE_INDEX));i<=NF;i+=$CIRCLE_NODE_TOTAL) print \$i }"); do wget https://sourceforge.net/projects/zsh/files/$v/zsh-${v#*/}.tar.gz && tar xzf zsh-${v#*/}.tar.gz && pushd zsh-${v#*/} && ./configure && sudo make install && popd || exit 1; done
 
 test:
   override:
-    - for v in $(echo $ZSH_VERSIONS | awk "{ for (i=$((1+CIRCLE_NODE_INDEX));i<=NF;i+=$CIRCLE_NODE_TOTAL) print \$i }"); do TEST_ZSH_BIN=/usr/local/bin/zsh-$v make test || exit 1; done:
+    - for v in $(echo $ZSH_VERSIONS | awk "{ for (i=$((1+CIRCLE_NODE_INDEX));i<=NF;i+=$CIRCLE_NODE_TOTAL) print \$i }"); do TEST_ZSH_BIN=/usr/local/bin/zsh-${v#*/} make test || exit 1; done:
         parallel: true

spec/integrations/bracketed_paste_magic_spec.rb

@@ -23,14 +23,5 @@ describe 'pasting using bracketed-paste-magic' do
         expect(session.content).to eq("echo #{'a' * 60}")
       end
     end
-
-    it 'shows a suggestion after a non-modifying keystroke' do
-      with_history('echo hello') do
-        session.paste_string('echo')
-        sleep 1
-        session.send_keys('left')
-        wait_for { session.content }.to eq('echo hello')
-      end
-    end
   end
 end

spec/integrations/rebound_bracket_spec.rb

@@ -0,0 +1,13 @@
+describe 'rebinding [' do
+  context 'initialized before sourcing the plugin' do
+    before do
+      session.run_command("function [ { $commands[\\[] \"$@\" }")
+      session.clear_screen
+    end
+
+    it 'executes the custom behavior and the built-in behavior' do
+      session.send_string('asdf')
+      wait_for { session.content }.to eq('asdf')
+    end
+  end
+end

spec/special_characters_spec.rb

@@ -1,60 +0,0 @@
-describe 'a special character in the buffer' do
-  it 'should be treated like any other character' do
-    with_history('echo "hello*"', 'echo "hello."') do
-      session.send_string('echo "hello*')
-      wait_for { session.content }.to eq('echo "hello*"')
-    end
-
-    with_history('echo "hello?"', 'echo "hello."') do
-      session.send_string('echo "hello?')
-      wait_for { session.content }.to eq('echo "hello?"')
-    end
-
-    with_history('echo "hello\nworld"') do
-      session.send_string('echo "hello\\')
-      wait_for { session.content }.to eq('echo "hello\nworld"')
-    end
-
-    with_history('echo "\\\\"') do
-      session.send_string('echo "\\\\')
-      wait_for { session.content }.to eq('echo "\\\\"')
-    end
-
-    with_history('echo ~/foo') do
-      session.send_string('echo ~')
-      wait_for { session.content }.to eq('echo ~/foo')
-    end
-
-    with_history('echo "$(ls foo)"') do
-      session.send_string('echo "$(')
-      wait_for { session.content }.to eq('echo "$(ls foo)"')
-    end
-
-    with_history('echo "$history[123]"') do
-      session.send_string('echo "$history[')
-      wait_for { session.content }.to eq('echo "$history[123]"')
-      session.send_string('123]')
-      wait_for { session.content }.to eq('echo "$history[123]"')
-    end
-
-    with_history('echo "#yolo"') do
-      session.send_string('echo "#')
-      wait_for { session.content }.to eq('echo "#yolo"')
-    end
-
-    with_history('echo "#foo"', 'echo $#abc') do
-      session.send_string('echo "#')
-      wait_for { session.content }.to eq('echo "#foo"')
-    end
-
-    with_history('echo "^A"', 'echo "^B"') do
-      session.send_string('echo "^A')
-      wait_for { session.content }.to eq('echo "^A"')
-    end
-
-    with_history('-foo() {}') do
-      session.send_string('-')
-      wait_for { session.content }.to eq('-foo() {}')
-    end
-  end
-end

spec/strategies/default_spec.rb

@@ -1,3 +1,5 @@
+require 'strategies/special_characters_helper'
+
 describe 'the default suggestion strategy' do
   it 'suggests the last matching history entry' do
     with_history('ls foo', 'ls bar', 'echo baz') do
@@ -5,4 +7,6 @@ describe 'the default suggestion strategy' do
       wait_for { session.content }.to eq('ls bar')
     end
   end
+
+  include_examples 'special characters'
 end

spec/strategies/match_prev_cmd_spec.rb

@@ -1,3 +1,5 @@
+require 'strategies/special_characters_helper'
+
 describe 'the match_prev_cmd strategy' do
   let(:options) { ['ZSH_AUTOSUGGEST_STRATEGY=match_prev_cmd'] }
 
@@ -14,4 +16,6 @@ describe 'the match_prev_cmd strategy' do
       wait_for { session.content }.to eq('ls bar')
     end
   end
+
+  include_examples 'special characters'
 end

spec/strategies/special_characters_helper.rb

@@ -0,0 +1,62 @@
+shared_examples 'special characters' do
+  describe 'a special character in the buffer' do
+    it 'should be treated like any other character' do
+      with_history('echo "hello*"', 'echo "hello."') do
+        session.send_string('echo "hello*')
+        wait_for { session.content }.to eq('echo "hello*"')
+      end
+
+      with_history('echo "hello?"', 'echo "hello."') do
+        session.send_string('echo "hello?')
+        wait_for { session.content }.to eq('echo "hello?"')
+      end
+
+      with_history('echo "hello\nworld"') do
+        session.send_string('echo "hello\\')
+        wait_for { session.content }.to eq('echo "hello\nworld"')
+      end
+
+      with_history('echo "\\\\"') do
+        session.send_string('echo "\\\\')
+        wait_for { session.content }.to eq('echo "\\\\"')
+      end
+
+      with_history('echo ~/foo') do
+        session.send_string('echo ~')
+        wait_for { session.content }.to eq('echo ~/foo')
+      end
+
+      with_history('echo "$(ls foo)"') do
+        session.send_string('echo "$(')
+        wait_for { session.content }.to eq('echo "$(ls foo)"')
+      end
+
+      with_history('echo "$history[123]"') do
+        session.send_string('echo "$history[')
+        wait_for { session.content }.to eq('echo "$history[123]"')
+        session.send_string('123]')
+        wait_for { session.content }.to eq('echo "$history[123]"')
+      end
+
+      with_history('echo "#yolo"') do
+        session.send_string('echo "#')
+        wait_for { session.content }.to eq('echo "#yolo"')
+      end
+
+      with_history('echo "#foo"', 'echo $#abc') do
+        session.send_string('echo "#')
+        wait_for { session.content }.to eq('echo "#foo"')
+      end
+
+      with_history('echo "^A"', 'echo "^B"') do
+        session.send_string('echo "^A')
+        wait_for { session.content }.to eq('echo "^A"')
+      end
+
+      with_history('-foo() {}') do
+        session.send_string('-')
+        wait_for { session.content }.to eq('-foo() {}')
+      end
+    end
+  end
+end

src/async.zsh

@@ -63,7 +63,7 @@ _zsh_autosuggest_async_pty_create() {
 	typeset -h REPLY
 
 	# If we won't get a fd back from zpty, try to guess it
-	if [ $_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD -eq 0 ]; then
+	if (( ! $_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD )); then
 		integer -l zptyfd
 		exec {zptyfd}>&1  # Open a new file descriptor (above 10).
 		exec {zptyfd}>&-  # Close it so it's free to be used by zpty.

src/bind.zsh

@@ -10,14 +10,14 @@ _zsh_autosuggest_incr_bind_count() {
 		_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]=1
 	fi
 
-	bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
+	typeset -gi bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
 }
 
 _zsh_autosuggest_get_bind_count() {
 	if ((${+_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]})); then
-		bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
+		typeset -gi bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
 	else
-		bind_count=0
+		typeset -gi bind_count=0
 	fi
 }
 
@@ -88,13 +88,13 @@ _zsh_autosuggest_bind_widgets() {
 
 	# Find every widget we might want to bind and bind it appropriately
 	for widget in ${${(f)"$(builtin zle -la)"}:#${(j:|:)~ignore_widgets}}; do
-		if [ ${ZSH_AUTOSUGGEST_CLEAR_WIDGETS[(r)$widget]} ]; then
+		if [[ -n ${ZSH_AUTOSUGGEST_CLEAR_WIDGETS[(r)$widget]} ]]; then
 			_zsh_autosuggest_bind_widget $widget clear
-		elif [ ${ZSH_AUTOSUGGEST_ACCEPT_WIDGETS[(r)$widget]} ]; then
+		elif [[ -n ${ZSH_AUTOSUGGEST_ACCEPT_WIDGETS[(r)$widget]} ]]; then
 			_zsh_autosuggest_bind_widget $widget accept
-		elif [ ${ZSH_AUTOSUGGEST_EXECUTE_WIDGETS[(r)$widget]} ]; then
+		elif [[ -n ${ZSH_AUTOSUGGEST_EXECUTE_WIDGETS[(r)$widget]} ]]; then
 			_zsh_autosuggest_bind_widget $widget execute
-		elif [ ${ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS[(r)$widget]} ]; then
+		elif [[ -n ${ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS[(r)$widget]} ]]; then
 			_zsh_autosuggest_bind_widget $widget partial_accept
 		else
 			# Assume any unspecified widget might modify the buffer
@@ -106,13 +106,13 @@ _zsh_autosuggest_bind_widgets() {
 # Given the name of an original widget and args, invoke it, if it exists
 _zsh_autosuggest_invoke_original_widget() {
 	# Do nothing unless called with at least one arg
-	[ $# -gt 0 ] || return
+	(( $# )) || return
 
 	local original_widget_name="$1"
 
 	shift
 
-	if [ $widgets[$original_widget_name] ]; then
+	if (( ${+widgets[$original_widget_name]} )); then
 		zle $original_widget_name -- $@
 	fi
 }

src/config.zsh

@@ -42,6 +42,7 @@ ZSH_AUTOSUGGEST_EXECUTE_WIDGETS=(
 # Widgets that accept the suggestion as far as the cursor moves
 ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS=(
 	forward-word
+	emacs-forward-word
 	vi-forward-word
 	vi-forward-word-end
 	vi-forward-blank-word

src/highlight.zsh

@@ -7,7 +7,7 @@
 _zsh_autosuggest_highlight_reset() {
 	typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
 
-	if [ -n "$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT" ]; then
+	if [[ -n "$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT" ]]; then
 		region_highlight=("${(@)region_highlight:#$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT}")
 		unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
 	fi
@@ -17,8 +17,8 @@ _zsh_autosuggest_highlight_reset() {
 _zsh_autosuggest_highlight_apply() {
 	typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
 
-	if [ $#POSTDISPLAY -gt 0 ]; then
-		_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
+	if (( $#POSTDISPLAY )); then
+		typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
 		region_highlight+=("$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT")
 	else
 		unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT

src/start.zsh

@@ -15,7 +15,7 @@ _zsh_autosuggest_start() {
 	# to the widget list variables to take effect on the next precmd.
 	add-zsh-hook precmd _zsh_autosuggest_bind_widgets
 
-	if [ -n "${ZSH_AUTOSUGGEST_USE_ASYNC+x}" ]; then
+	if [[ -n "${ZSH_AUTOSUGGEST_USE_ASYNC+x}" ]]; then
 		_zsh_autosuggest_async_start
 	fi
 }

src/strategies/default.zsh

@@ -16,10 +16,10 @@ _zsh_autosuggest_strategy_default() {
 	# Escape backslashes and all of the glob operators so we can use
 	# this string as a pattern to search the $history associative array.
 	# - (#m) globbing flag enables setting references for match data
+	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
 	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
 	# Get the history items that match
 	# - (r) subscript flag makes the pattern match on values
-	suggestion="${history[(r)$prefix*]}"
-
+	typeset -g suggestion="${history[(r)${prefix}*]}"
 }

src/strategies/match_prev_cmd.zsh

@@ -21,7 +21,14 @@
 # `HIST_EXPIRE_DUPS_FIRST`.
 
 _zsh_autosuggest_strategy_match_prev_cmd() {
-	local prefix="${1//(#m)[\\()\[\]|*?~]/\\$MATCH}"
+	# Reset options to defaults and enable LOCAL_OPTIONS
+	emulate -L zsh
+
+	# Enable globbing flags so that we can use (#m)
+	setopt EXTENDED_GLOB
+
+	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
+	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
 	# Get all history event numbers that correspond to history
 	# entries that match pattern $prefix*
@@ -48,5 +55,5 @@ _zsh_autosuggest_strategy_match_prev_cmd() {
 	done
 
 	# Give back the matched history entry
-	suggestion="$history[$histkey]"
+	typeset -g suggestion="$history[$histkey]"
 }

src/widgets.zsh

@@ -13,14 +13,14 @@ _zsh_autosuggest_disable() {
 _zsh_autosuggest_enable() {
 	unset _ZSH_AUTOSUGGEST_DISABLED
 
-	if [ $#BUFFER -gt 0 ]; then
+	if (( $#BUFFER )); then
 		_zsh_autosuggest_fetch
 	fi
 }
 
 # Toggle suggestions (enable/disable)
 _zsh_autosuggest_toggle() {
-	if [ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]; then
+	if [[ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]]; then
 		_zsh_autosuggest_enable
 	else
 		_zsh_autosuggest_disable
@@ -39,7 +39,7 @@ _zsh_autosuggest_clear() {
 _zsh_autosuggest_modify() {
 	local -i retval
 
-	# Only added to zsh very recently
+	# Only available in zsh >= 5.4
 	local -i KEYS_QUEUED_COUNT
 
 	# Save the contents of the buffer/postdisplay
@@ -54,35 +54,35 @@ _zsh_autosuggest_modify() {
 	retval=$?
 
 	# Don't fetch a new suggestion if there's more input to be read immediately
-	if [[ $PENDING > 0 ]] || [[ $KEYS_QUEUED_COUNT > 0 ]]; then
+	if (( $PENDING > 0 )) || (( $KEYS_QUEUED_COUNT > 0 )); then
 		return $retval
 	fi
 
 	# Optimize if manually typing in the suggestion
-	if [ $#BUFFER -gt $#orig_buffer ]; then
+	if (( $#BUFFER > $#orig_buffer )); then
 		local added=${BUFFER#$orig_buffer}
 
 		# If the string added matches the beginning of the postdisplay
-		if [ "$added" = "${orig_postdisplay:0:$#added}" ]; then
+		if [[ "$added" = "${orig_postdisplay:0:$#added}" ]]; then
 			POSTDISPLAY="${orig_postdisplay:$#added}"
 			return $retval
 		fi
 	fi
 
 	# Don't fetch a new suggestion if the buffer hasn't changed
-	if [ "$BUFFER" = "$orig_buffer" ]; then
+	if [[ "$BUFFER" = "$orig_buffer" ]]; then
 		POSTDISPLAY="$orig_postdisplay"
 		return $retval
 	fi
 
 	# Bail out if suggestions are disabled
-	if [ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]; then
+	if [[ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]]; then
 		return $?
 	fi
 
 	# Get a new suggestion if the buffer is not empty after modification
-	if [ $#BUFFER -gt 0 ]; then
-		if [ -z "$ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE" -o $#BUFFER -le "$ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE" ]; then
+	if (( $#BUFFER > 0 )); then
+		if [[ -z "$ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE" ]] || (( $#BUFFER <= $ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE )); then
 			_zsh_autosuggest_fetch
 		fi
 	fi
@@ -105,7 +105,7 @@ _zsh_autosuggest_fetch() {
 _zsh_autosuggest_suggest() {
 	local suggestion="$1"
 
-	if [ -n "$suggestion" ] && [ $#BUFFER -gt 0 ]; then
+	if [[ -n "$suggestion" ]] && (( $#BUFFER )); then
 		POSTDISPLAY="${suggestion#$BUFFER}"
 	else
 		unset POSTDISPLAY
@@ -118,12 +118,12 @@ _zsh_autosuggest_accept() {
 
 	# When vicmd keymap is active, the cursor can't move all the way
 	# to the end of the buffer
-	if [ "$KEYMAP" = "vicmd" ]; then
+	if [[ "$KEYMAP" = "vicmd" ]]; then
 		max_cursor_pos=$((max_cursor_pos - 1))
 	fi
 
 	# Only accept if the cursor is at the end of the buffer
-	if [ $CURSOR -eq $max_cursor_pos ]; then
+	if [[ $CURSOR = $max_cursor_pos ]]; then
 		# Add the suggestion to the buffer
 		BUFFER="$BUFFER$POSTDISPLAY"
 
@@ -165,7 +165,7 @@ _zsh_autosuggest_partial_accept() {
 	retval=$?
 
 	# If we've moved past the end of the original buffer
-	if [ $CURSOR -gt $#original_buffer ]; then
+	if (( $CURSOR > $#original_buffer )); then
 		# Set POSTDISPLAY to text right of the cursor
 		POSTDISPLAY="$RBUFFER"
 

zsh-autosuggestions.zsh

@@ -1,6 +1,6 @@
 # Fish-like fast/unobtrusive autosuggestions for zsh.
 # https://github.com/zsh-users/zsh-autosuggestions
-# v0.4.0
+# v0.4.2
 # Copyright (c) 2013 Thiago de Arruda
 # Copyright (c) 2016-2017 Eric Freese
 # 
@@ -78,6 +78,7 @@ ZSH_AUTOSUGGEST_EXECUTE_WIDGETS=(
 # Widgets that accept the suggestion as far as the cursor moves
 ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS=(
 	forward-word
+	emacs-forward-word
 	vi-forward-word
 	vi-forward-word-end
 	vi-forward-blank-word
@@ -141,14 +142,14 @@ _zsh_autosuggest_incr_bind_count() {
 		_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]=1
 	fi
 
-	bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
+	typeset -gi bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
 }
 
 _zsh_autosuggest_get_bind_count() {
 	if ((${+_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]})); then
-		bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
+		typeset -gi bind_count=$_ZSH_AUTOSUGGEST_BIND_COUNTS[$1]
 	else
-		bind_count=0
+		typeset -gi bind_count=0
 	fi
 }
 
@@ -219,13 +220,13 @@ _zsh_autosuggest_bind_widgets() {
 
 	# Find every widget we might want to bind and bind it appropriately
 	for widget in ${${(f)"$(builtin zle -la)"}:#${(j:|:)~ignore_widgets}}; do
-		if [ ${ZSH_AUTOSUGGEST_CLEAR_WIDGETS[(r)$widget]} ]; then
+		if [[ -n ${ZSH_AUTOSUGGEST_CLEAR_WIDGETS[(r)$widget]} ]]; then
 			_zsh_autosuggest_bind_widget $widget clear
-		elif [ ${ZSH_AUTOSUGGEST_ACCEPT_WIDGETS[(r)$widget]} ]; then
+		elif [[ -n ${ZSH_AUTOSUGGEST_ACCEPT_WIDGETS[(r)$widget]} ]]; then
 			_zsh_autosuggest_bind_widget $widget accept
-		elif [ ${ZSH_AUTOSUGGEST_EXECUTE_WIDGETS[(r)$widget]} ]; then
+		elif [[ -n ${ZSH_AUTOSUGGEST_EXECUTE_WIDGETS[(r)$widget]} ]]; then
 			_zsh_autosuggest_bind_widget $widget execute
-		elif [ ${ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS[(r)$widget]} ]; then
+		elif [[ -n ${ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS[(r)$widget]} ]]; then
 			_zsh_autosuggest_bind_widget $widget partial_accept
 		else
 			# Assume any unspecified widget might modify the buffer
@@ -237,13 +238,13 @@ _zsh_autosuggest_bind_widgets() {
 # Given the name of an original widget and args, invoke it, if it exists
 _zsh_autosuggest_invoke_original_widget() {
 	# Do nothing unless called with at least one arg
-	[ $# -gt 0 ] || return
+	(( $# )) || return
 
 	local original_widget_name="$1"
 
 	shift
 
-	if [ $widgets[$original_widget_name] ]; then
+	if (( ${+widgets[$original_widget_name]} )); then
 		zle $original_widget_name -- $@
 	fi
 }
@@ -256,7 +257,7 @@ _zsh_autosuggest_invoke_original_widget() {
 _zsh_autosuggest_highlight_reset() {
 	typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
 
-	if [ -n "$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT" ]; then
+	if [[ -n "$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT" ]]; then
 		region_highlight=("${(@)region_highlight:#$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT}")
 		unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
 	fi
@@ -266,8 +267,8 @@ _zsh_autosuggest_highlight_reset() {
 _zsh_autosuggest_highlight_apply() {
 	typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
 
-	if [ $#POSTDISPLAY -gt 0 ]; then
-		_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
+	if (( $#POSTDISPLAY )); then
+		typeset -g _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT="$#BUFFER $(($#BUFFER + $#POSTDISPLAY)) $ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE"
 		region_highlight+=("$_ZSH_AUTOSUGGEST_LAST_HIGHLIGHT")
 	else
 		unset _ZSH_AUTOSUGGEST_LAST_HIGHLIGHT
@@ -288,14 +289,14 @@ _zsh_autosuggest_disable() {
 _zsh_autosuggest_enable() {
 	unset _ZSH_AUTOSUGGEST_DISABLED
 
-	if [ $#BUFFER -gt 0 ]; then
+	if (( $#BUFFER )); then
 		_zsh_autosuggest_fetch
 	fi
 }
 
 # Toggle suggestions (enable/disable)
 _zsh_autosuggest_toggle() {
-	if [ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]; then
+	if [[ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]]; then
 		_zsh_autosuggest_enable
 	else
 		_zsh_autosuggest_disable
@@ -314,7 +315,7 @@ _zsh_autosuggest_clear() {
 _zsh_autosuggest_modify() {
 	local -i retval
 
-	# Only added to zsh very recently
+	# Only available in zsh >= 5.4
 	local -i KEYS_QUEUED_COUNT
 
 	# Save the contents of the buffer/postdisplay
@@ -329,35 +330,35 @@ _zsh_autosuggest_modify() {
 	retval=$?
 
 	# Don't fetch a new suggestion if there's more input to be read immediately
-	if [[ $PENDING > 0 ]] || [[ $KEYS_QUEUED_COUNT > 0 ]]; then
+	if (( $PENDING > 0 )) || (( $KEYS_QUEUED_COUNT > 0 )); then
 		return $retval
 	fi
 
 	# Optimize if manually typing in the suggestion
-	if [ $#BUFFER -gt $#orig_buffer ]; then
+	if (( $#BUFFER > $#orig_buffer )); then
 		local added=${BUFFER#$orig_buffer}
 
 		# If the string added matches the beginning of the postdisplay
-		if [ "$added" = "${orig_postdisplay:0:$#added}" ]; then
+		if [[ "$added" = "${orig_postdisplay:0:$#added}" ]]; then
 			POSTDISPLAY="${orig_postdisplay:$#added}"
 			return $retval
 		fi
 	fi
 
 	# Don't fetch a new suggestion if the buffer hasn't changed
-	if [ "$BUFFER" = "$orig_buffer" ]; then
+	if [[ "$BUFFER" = "$orig_buffer" ]]; then
 		POSTDISPLAY="$orig_postdisplay"
 		return $retval
 	fi
 
 	# Bail out if suggestions are disabled
-	if [ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]; then
+	if [[ -n "${_ZSH_AUTOSUGGEST_DISABLED+x}" ]]; then
 		return $?
 	fi
 
 	# Get a new suggestion if the buffer is not empty after modification
-	if [ $#BUFFER -gt 0 ]; then
-		if [ -z "$ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE" -o $#BUFFER -le "$ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE" ]; then
+	if (( $#BUFFER > 0 )); then
+		if [[ -z "$ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE" ]] || (( $#BUFFER <= $ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE )); then
 			_zsh_autosuggest_fetch
 		fi
 	fi
@@ -380,7 +381,7 @@ _zsh_autosuggest_fetch() {
 _zsh_autosuggest_suggest() {
 	local suggestion="$1"
 
-	if [ -n "$suggestion" ] && [ $#BUFFER -gt 0 ]; then
+	if [[ -n "$suggestion" ]] && (( $#BUFFER )); then
 		POSTDISPLAY="${suggestion#$BUFFER}"
 	else
 		unset POSTDISPLAY
@@ -393,12 +394,12 @@ _zsh_autosuggest_accept() {
 
 	# When vicmd keymap is active, the cursor can't move all the way
 	# to the end of the buffer
-	if [ "$KEYMAP" = "vicmd" ]; then
+	if [[ "$KEYMAP" = "vicmd" ]]; then
 		max_cursor_pos=$((max_cursor_pos - 1))
 	fi
 
 	# Only accept if the cursor is at the end of the buffer
-	if [ $CURSOR -eq $max_cursor_pos ]; then
+	if [[ $CURSOR = $max_cursor_pos ]]; then
 		# Add the suggestion to the buffer
 		BUFFER="$BUFFER$POSTDISPLAY"
 
@@ -440,7 +441,7 @@ _zsh_autosuggest_partial_accept() {
 	retval=$?
 
 	# If we've moved past the end of the original buffer
-	if [ $CURSOR -gt $#original_buffer ]; then
+	if (( $CURSOR > $#original_buffer )); then
 		# Set POSTDISPLAY to text right of the cursor
 		POSTDISPLAY="$RBUFFER"
 
@@ -497,12 +498,12 @@ _zsh_autosuggest_strategy_default() {
 	# Escape backslashes and all of the glob operators so we can use
 	# this string as a pattern to search the $history associative array.
 	# - (#m) globbing flag enables setting references for match data
+	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
 	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
 	# Get the history items that match
 	# - (r) subscript flag makes the pattern match on values
-	suggestion="${history[(r)$prefix*]}"
-
+	typeset -g suggestion="${history[(r)${prefix}*]}"
 }
 
 #--------------------------------------------------------------------#
@@ -527,7 +528,14 @@ _zsh_autosuggest_strategy_default() {
 # `HIST_EXPIRE_DUPS_FIRST`.
 
 _zsh_autosuggest_strategy_match_prev_cmd() {
-	local prefix="${1//(#m)[\\()\[\]|*?~]/\\$MATCH}"
+	# Reset options to defaults and enable LOCAL_OPTIONS
+	emulate -L zsh
+
+	# Enable globbing flags so that we can use (#m)
+	setopt EXTENDED_GLOB
+
+	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
+	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
 	# Get all history event numbers that correspond to history
 	# entries that match pattern $prefix*
@@ -554,7 +562,7 @@ _zsh_autosuggest_strategy_match_prev_cmd() {
 	done
 
 	# Give back the matched history entry
-	suggestion="$history[$histkey]"
+	typeset -g suggestion="$history[$histkey]"
 }
 
 #--------------------------------------------------------------------#
@@ -621,7 +629,7 @@ _zsh_autosuggest_async_pty_create() {
 	typeset -h REPLY
 
 	# If we won't get a fd back from zpty, try to guess it
-	if [ $_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD -eq 0 ]; then
+	if (( ! $_ZSH_AUTOSUGGEST_ZPTY_RETURNS_FD )); then
 		integer -l zptyfd
 		exec {zptyfd}>&1  # Open a new file descriptor (above 10).
 		exec {zptyfd}>&-  # Close it so it's free to be used by zpty.
@@ -682,7 +690,7 @@ _zsh_autosuggest_start() {
 	# to the widget list variables to take effect on the next precmd.
 	add-zsh-hook precmd _zsh_autosuggest_bind_widgets
 
-	if [ -n "${ZSH_AUTOSUGGEST_USE_ASYNC+x}" ]; then
+	if [[ -n "${ZSH_AUTOSUGGEST_USE_ASYNC+x}" ]]; then
 		_zsh_autosuggest_async_start
 	fi
 }