Merge pull request #650 from tristan0x/emacs

Emacs

plugins/emacs/emacs.plugin.zsh

+# Emacs 23 daemon capability is a killing feature.
+# One emacs process handles all your frames whether
+# you use a frame opened in a terminal via a ssh connection or X frames
+# opened on the same host.
+
+# Benefits are multiple
+# - You don't have the cost of starting Emacs all the time anymore
+# - Opening a file is as fast as Emacs does not have anything else to do.
+# - You can share opened buffered across opened frames.
+# - Configuration changes made at runtime are applied to all frames.
+
+
+if "$ZSH/tools/require_tool.sh" emacs 23 2>/dev/null ; then
+    export EMACS_PLUGIN_LAUNCHER="$ZSH/plugins/emacs/emacsclient.sh"
+
+    # set EDITOR if not already defined.
+    export EDITOR="${EDITOR:-${EMACS_PLUGIN_LAUNCHER}}"
+
+    alias emacs="$EMACS_PLUGIN_LAUNCHER --no-wait"
+    alias e=emacs
+
+    # same than M-x eval but from outside Emacs.
+    alias eeval="$EMACS_PLUGIN_LAUNCHER --eval"
+    # create a new X frame
+    alias eframe='emacsclient --alternate-editor "" --create-frame'
+
+    # to code all night long
+    alias emasc=emacs
+    alias emcas=emacs
+
+    # Write to standard output the path to the file
+    # opened in the current buffer.
+    function efile {
+        local cmd="(buffer-file-name (window-buffer))"
+        "$EMACS_PLUGIN_LAUNCHER" --eval "$cmd" | tr -d \"
+    }
+
+    # Write to standard output the directory of the file
+    # opened in the the current buffer
+    function ecd {
+        local cmd="(let ((buf-name (buffer-file-name (window-buffer))))
+                     (if buf-name (file-name-directory buf-name)))"
+
+        local dir="$($EMACS_PLUGIN_LAUNCHER --eval $cmd | tr -d \")"
+        if [ -n "$dir" ] ;then
+            echo "$dir"
+        else
+            echo "can not deduce current buffer filename." >/dev/stderr
+            return 1
+        fi
+    }
+fi
+
+## Local Variables:
+## mode: sh
+## End:

plugins/emacs/emacsclient.sh

+#!/bin/sh
+
+# get list of available X windows.
+x=`emacsclient --alternate-editor '' --eval '(x-display-list)' 2>/dev/null`
+
+if [ -z "$x" ] ;then
+    # Create one if there is no X window yet.
+    emacsclient --alternate-editor "" --create-frame "$@"
+else
+    # prevent creating another X frame if there is at least one present.
+    emacsclient --alternate-editor "" "$@"
+fi