added tmux, butter fish config

config_in/fish/functions/fish_mode_prompt.fish

@@ -0,0 +1,48 @@
+# Display the current binding mode... if it's vi or vi-like.
+#
+# To always show the binding mode (regardless of current bindings):
+#     set -g theme_display_vi yes
+#
+# To never show:
+#     set -g theme_display_vi no
+
+
+# invisible space is inserted into prompt to play nice with tmux jumping 
+# https://unix.stackexchange.com/questions/226731/jump-to-last-prompt-in-terminal-or-tmux
+set -g invisible_space " "
+
+function fish_mode_prompt -d 'bobthefish-optimized fish mode indicator'
+    [ "$theme_display_vi" != 'no' ]
+    or return
+
+    [ "$fish_key_bindings" = 'fish_vi_key_bindings' \
+        -o "$fish_key_bindings" = 'hybrid_bindings' \
+        -o "$fish_key_bindings" = 'fish_hybrid_key_bindings' \
+        -o "$theme_display_vi" = 'yes' ]
+    or return
+ 
+    __bobthefish_colors $theme_color_scheme
+ 
+    type -q bobthefish_colors
+    and bobthefish_colors
+ 
+    set_color normal # clear out anything bold or underline...
+ 
+    switch $fish_bind_mode
+        case default
+            set_color -b $color_vi_mode_default
+            echo -n " N$invisible_space"
+        case insert
+            set_color -b $color_vi_mode_insert
+            echo -n " I$invisible_space"
+        case replace_one replace-one
+            set_color -b $color_vi_mode_insert
+            echo -n " R$invisible_space"
+        case visual
+            set_color -b $color_vi_mode_visual
+            echo -n " V$invisible_space"
+    end
+
+    set_color normal
+end
+