Add preview toggle to fzf/fish

assets/default/fish/functions/__fzf_preview.fish

@@ -0,0 +1,16 @@
+# A function that can be used as the preview function for FZF to make fancy previews with syntax highlighting
+function __fzf_preview
+    if file --mime "$argv" | grep -q binary
+        echo "$argv is a binary file"
+    else
+        if command --quiet --search bat
+            bat --color=always --line-range :500 "$argv"
+        else if command --quiet --search chroma
+            chroma "$argv" | head -250
+        else if command --quiet --search coderay
+            coderay "$argv" | head -250
+        else
+            head -250 "$argv"
+        end
+    end
+end

assets/default/fish/functions/fzf_extensions.fish

@@ -1,8 +0,0 @@
-# A function that can be used as the preview function for FZF to make fancy previews with syntax highlighting
-function __fzf_preview
-    if file --mime "$argv" | grep -q binary
-        echo "$argv is a binary file"
-    else
-        coderay "$argv" ;or cat "$argv" 2> /dev/null | head -250
-    end
-end

assets/default/fish/init/env.fish

@@ -16,6 +16,11 @@ end
 if [ -n "$FZF_DEFAULT_COMMAND" ]
     set -gx FZF_CTRL_T_COMMAND "$FZF_DEFAULT_COMMAND \$dir"
 end
+set -gx FZF_DEFAULT_OPTS "
+--preview-window=:hidden
+--preview='__fzf_preview {}'
+--bind '?:toggle-preview'
+"
 
 # Vim Colors so that they can be set by env
 set -q VIM_COLOR; set -gx VIM_COLOR (eval $HOME/bin/get_vim_colorscheme.sh); or set -gx VIM_COLOR wombat256mod