[Fix sorin-ionescu#532] Integrate autosuggestions

.gitmodules

@@ -16,3 +16,6 @@
 [submodule "modules/prompt/functions/pure"]
 	path = modules/prompt/external/pure
 	url = https://github.com/sindresorhus/pure.git
+[submodule "modules/autosuggestions/external"]
+	path = modules/autosuggestions/external
+	url = https://github.com/tarruda/zsh-autosuggestions

modules/README.md

@@ -10,6 +10,11 @@ Archive
 
 Provides functions to list and extract archives.
 
+Autosuggestions
+---------------
+
+Integrates zsh-autosuggestions into Prezto.
+
 Command-Not-Found
 -----------------
 

modules/autosuggestions/README.md

@@ -0,0 +1,53 @@
+Autosuggestions
+---------------
+
+Integrates zsh-autosuggestions into Prezto.
+
+Autosuggestions
+===============
+
+Integrates [zsh-autosuggestions][1] into Prezto, which implements the
+[Fish shell][2]'s autosuggestions feature, where the user can type in any part
+of a previously entered command and Zsh suggests commands as you type based on
+history and completions.
+
+If this module is used in conjuncture with the *syntax-highlighting* module, it
+must be loaded **after** it.
+
+If this module is used in conjuncture with the *history-substring-search*
+module, it must be loaded **after** it.
+
+Contributors
+------------
+
+New features and bug fixes should be submitted to the [zsh-autosuggestions][1]
+project according to its rules and regulations. This module will be synchronized
+against it.
+
+Settings
+--------
+
+### Highlighting
+
+If colors are enabled, *autosuggestions* will automatically highlight
+positive results.
+
+To enable highlighting for this module only, add the following line to
+*zpreztorc*:
+
+    zstyle ':prezto:module:autosuggestions' color 'yes'
+
+To set the query found color, add the following line to *zpreztorc*:
+
+    zstyle ':prezto:module:autosuggestions:color' found ''
+
+Authors
+-------
+
+*The authors of this module should be contacted via the [issue tracker][3].*
+
+  - [Sorin Ionescu](https://github.com/sorin-ionescu)
+
+[1]: https://github.com/tarruda/zsh-autosuggestions
+[2]: http://fishshell.com
+[3]: https://github.com/sorin-ionescu/prezto/issues

modules/autosuggestions/init.zsh

@@ -0,0 +1,35 @@
+#
+# Integrates zsh-autosuggestions into Prezto.
+#
+# Authors:
+#   Sorin Ionescu <[email protected]>
+#
+
+# Load dependencies.
+pmodload 'editor'
+
+# Source module files.
+source "${0:h}/external/zsh-autosuggestions.zsh" || return 1
+
+#
+# Highlighting
+#
+
+# Set highlight color, default 'fg=8'.
+zstyle -s ':prezto:module:autosuggestions:color' found \
+  'ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE' || ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE='fg=8'
+
+# Disable highlighting.
+if ! zstyle -t ':prezto:module:autosuggestions' color; then
+  ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE=''
+fi
+
+#
+# Key Bindings
+#
+
+if [[ -n "$key_info" ]]; then
+  # vi
+  bindkey -M viins "$key_info[Control]F" vi-forward-word
+  bindkey -M viins "$key_info[Control]E" vi-add-eol
+fi

runcoms/zpreztorc

@@ -34,6 +34,13 @@ zstyle ':prezto:load' pmodule \
   'completion' \
   'prompt'
 
+#
+# Autosuggestions
+#
+
+# Set the query found color.
+# zstyle ':prezto:module:autosuggestions:color' found ''
+
 #
 # Editor
 #