moving prompt utils out of bash prompt

bash/ext

@@ -1,4 +1,7 @@
 # Make Bash more like Zsh
+
+
+# Hooks
 # derived from http://glyf.livejournal.com/63106.html
 
 # default: NOOPs
@@ -25,3 +28,26 @@ __preexec_invoke_exec () {
 PROMPT_COMMAND="precmd"
 trap '__preexec_invoke_exec' DEBUG
 cd() { __cd_invoke_chpwd $@; }
+
+
+# clears a line that was not terminated by a LF
+# fixing the dangling prompt issue
+# marks it with a reverse %, like zsh
+clear_incomplete_line() {
+    # ask for cursor position
+    echo -en "\033[6n"
+    # read answer
+    IFS=';' read -r -d R -a pos
+    # extract tput-compatible answer
+    local row=$((${pos[0]:2} - 1))
+    local col=$((${pos[1]} - 1))
+    # move back over terminal answer echo, which will hopefully be overwritten
+    tput cup $row $col
+
+    # not on first column? clean up! (overwrites answer)
+    # we print a terminal width worth of columns, but since 
+    # it goes too far, we backtrack with CR
+    [[ $col != 0 ]] && printf "\e[7m%%\e[m%*s\r" $((COLUMNS-1))
+    # else e.g prompt will overwrite answer echo
+}
+