[input] add double-dot expansion option

Closes #49

modules/input/README.md

@@ -5,3 +5,6 @@ Applies correct bindkeys for input events.
 
 Without this module, you may experience oddities in how Zsh interprets input.
 For example, using the UP key, then using the back arrow and pressing DELETE may capatalize characters rather than delete them. 
+
+This module also provides double-dot parent directory expansion.
+It can be enabled by uncommenting `zdouble_dot_expansion='true'` in your .zimrc

modules/input/init.zsh

@@ -65,6 +65,18 @@ if [[ -n "${key_info[Insert]}" ]]; then
   bindkey "${key_info[Insert]}" overwrite-mode
 fi
 
+if [[ ${zdouble_dot_expand} ]]; then
+  double-dot-expand() {
+    if [[ ${LBUFFER} == *.. ]]; then
+      LBUFFER+='/..'
+    else
+      LBUFFER+='.'
+    fi
+  }
+  zle -N double-dot-expand
+  bindkey "." double-dot-expand
+fi
+
 bindkey "${key_info[Delete]}" delete-char
 bindkey "${key_info[Backspace]}" backward-delete-char
 

templates/zimrc

@@ -42,6 +42,14 @@ zprompt_theme='steeef'
 # See: http://zsh.sourceforge.net/Doc/Release/Options.html#Input_002fOutput
 #zcorrection='true'
 
+#
+# Input
+#
+
+# Uncomment to enable double-dot expansion.
+# This appends '../' to your input for each '.' you type after an initial '..'
+#zdouble_dot_expand='true'
+
 #
 # Syntax-Highlighting
 #