Rewrite terminal auto-title

modules/helper/README.md

@@ -11,6 +11,8 @@ Functions
   - `is-autoloadable` checks if a file can be autoloaded by trying to load it
     in a subshell.
   - `is-callable` checks if a name is a command, function, or alias.
+  - `is-terminal-inside-multiplexer` checks if the currently running terminal is
+     inside a terminal multiplexer.
   - `is-true` checks a boolean variable for "true".
   - `coalesce` prints the first non-empty string in the arguments array.
 

modules/helper/init.zsh

@@ -21,6 +21,11 @@ function is-true {
   [[ -n "$1" && "$1" == (1|[Yy]([Ee][Ss]|)|[Tt]([Rr][Uu][Ee]|)|[Oo]([Nn]|)) ]]
 }
 
+# Checks if the currently running terminal is inside a terminal multiplexer.
+function is-terminal-inside-multiplexer {
+  [[ -n "$STY" || -n "$TMUX" || -n "$DVTM" ]]
+}
+
 # Prints the first non-empty string in the arguments array.
 function coalesce {
   for arg in $argv; do

modules/terminal/README.md

@@ -8,10 +8,15 @@ Settings
 
 ### Auto-Title
 
-To auto set the terminal window and tab titles with the current command or
+To auto set the terminal emulator window and tab titles with the current command
+or directory, add the following to *zpreztorc*:
+
+    zstyle ':prezto:module:terminal:auto-title' emulator 'yes'
+
+To auto set the terminal multiplexer window title with the current command or
 directory, add the following to *zpreztorc*:
 
-    zstyle ':prezto:module:terminal' auto-title 'yes'
+    zstyle ':prezto:module:terminal:auto-title' multiplexer 'yes'
 
 Functions
 ---------

modules/terminal/init.zsh

@@ -6,6 +6,9 @@
 #   Sorin Ionescu <sorin.ionescu@gmail.com>
 #
 
+# Load dependencies.
+pmodload 'helper'
+
 # Return if requirements are not found.
 if [[ "$TERM" == 'dumb' ]]; then
   return 1
@@ -20,21 +23,23 @@ function set-screen-window-title {
 
 # Sets the terminal window title.
 function set-terminal-window-title {
-  if [[ "$TERM" == ((x|a|ml|dt|E)term*|(u|)rxvt*) ]]; then
+  if [[ "$TERM" == ((x|a|ml|dt|E)term*|(u|)rxvt*|dvtm*) ]]; then
     printf "\e]2;%s\a" ${(V)argv}
   fi
 }
 
 # Sets the terminal tab title.
 function set-terminal-tab-title {
-  if [[ "$TERM" == ((x|a|ml|dt|E)term*|(u|)rxvt*) ]]; then
+  if [[ "$TERM" == ((x|a|ml|dt|E)term*|(u|)rxvt*|dvtm*) ]]; then
     printf "\e]1;%s\a" ${(V)argv}
   fi
 }
 
 # Sets the Terminal.app current working directory.
 function set-terminal-app-cwd {
-  printf '\e]7;%s\a' "file://$HOST${PWD// /%20}"
+  if [[ "$TERM_PROGRAM" == 'Apple_Terminal' ]]; then
+    printf '\e]7;%s\a' "file://$HOST${${1:-$PWD}// /%20}"
+  fi
 }
 
 # Sets the tab and window titles with a given command.
@@ -89,36 +94,49 @@ function set-titles-with-path {
   fi
 }
 
-# Don't override precmd/preexec; append to hook array.
+# Do not override precmd/preexec; append to the hook array.
 autoload -Uz add-zsh-hook
 
-if [[ "$TERM_PROGRAM" == 'Apple_Terminal' ]]; then
-  # Sets the Terminal.app current working directory.
+# Set up the Apple Terminal.
+if [[ "$TERM_PROGRAM" == 'Apple_Terminal' ]] \
+  && (( ${${OSTYPE#darwin}[1,2]} >= 11 )) \
+	&& ! is-terminal-inside-multiplexer
+then
+  # Sets the Terminal.app current working directory before the prompt is
+	# displayed.
   add-zsh-hook precmd set-terminal-app-cwd
 
+	# Unsets the Terminal.app current working directory when a terminal
+	# multiplexer or remote connection is started since it can no longer be
+  # updated, and it becomes confusing when the directory displayed in the title
+  # bar is no longer synchronized with real current working directory.
+	function unset-terminal-app-cwd {
+    if [[ "${2[(w)1]:t}" == (screen|tmux|dvtm|ssh|mosh) ]]; then
+      set-terminal-app-cwd ' '
+    fi
+	}
+	add-zsh-hook preexec unset-terminal-app-cwd
+
   # Do not set the tab and window titles in Terminal.app since it sets the tab
   # title to the currently running process by default and the current working
-  # directory is set separately.
-
-  # Do set the tab and window titles inside terminal multiplexers.
-  if [[ "$TERM" != screen* ]]; then
+  # directory is set separately, but do set the tab and window titles inside
+	# terminal multiplexers inside Terminal.app.
 	return
-  fi
 fi
 
-# Sets the tab and window titles before the prompt is displayed.
-function set-titles-precmd {
-  if zstyle -t ':prezto:module:terminal' auto-title; then
-    set-titles-with-path
-  fi
-}
-add-zsh-hook precmd set-titles-precmd
+# Set up non-Apple terminals.
+if ( ( ! is-terminal-inside-multiplexer || [[ -n "$DVTM" ]] ) \
+    && zstyle -t ':prezto:module:terminal:auto-title' emulator ) \
+  || ( is-terminal-inside-multiplexer \
+    && zstyle -t ':prezto:module:terminal:auto-title' multiplexer )
+then
+	# Sets the tab and window titles before the prompt is displayed.
+	add-zsh-hook precmd set-titles-with-path
 
-# Sets the tab and window titles before command execution.
-function set-titles-preexec {
-  if zstyle -t ':prezto:module:terminal' auto-title; then
+	# Sets the tab and window titles before command execution.
+	function set-titles-with-command-preexec {
 		set-titles-with-command "$2"
-  fi
-}
-add-zsh-hook preexec set-titles-preexec
+	}
+	add-zsh-hook preexec set-titles-with-command-preexec
+fi
 

runcoms/zpreztorc

@@ -122,14 +122,16 @@ zstyle ':prezto:module:prompt' theme 'sorin'
 #   'builtin' 'bg=blue' \
 #   'command' 'bg=blue' \
 #   'function' 'bg=blue'
-#
 
 #
 # Terminal
 #
 
-# Auto set the tab and window titles.
-zstyle ':prezto:module:terminal' auto-title 'yes'
+# Auto set the terminal emulator tab and window titles.
+zstyle ':prezto:module:terminal:auto-title' emulator 'yes'
+
+# Auto set the terminal multiplexer window title.
+zstyle ':prezto:module:terminal:auto-title' multiplexer 'no'
 
 #
 # Tmux