Make column wrap and strip

.config/fish/functions/construct_column_aware_prompt.fish

@@ -0,0 +1,43 @@
+function construct_column_aware_prompt -a prompt_prefix prompt_dir
+    set -l prompt_concat "$prompt_prefix$prompt_dir"
+
+    if test (expr length "$prompt_concat") -le $COLUMNS
+        echo $prompt_prefix$prompt_dir
+    else
+        if test (expr length "$prompt_prefix") -le $COLUMNS
+            set -l split_prompt_concat (string split "/" $prompt_dir)
+
+            if test (count $split_prompt_concat) -lt 2
+                echo (string sub -s 1 -l (math $COLUMNS - (expr length "$prompt_prefix")) $prompt_dir)
+            else
+                for i in (seq (count $split_prompt_concat))
+                    if test (expr length "> $split_prompt_concat[$i]/") -gt $COLUMNS
+                        set split_prompt_concat[$i] (string sub -s 1 -l (math $COLUMNS - 8) $split_prompt_concat[$i])'[...]'
+                    end
+                end
+
+                set -l tmp_lines "$prompt_prefix"
+
+                for item in $split_prompt_concat
+                    set -l tmp_line "$tmp_lines$item/"
+                    if test (expr length "$tmp_line") -le $COLUMNS
+                        set tmp_lines $tmp_line
+                    else
+                        echo $tmp_lines
+                        set tmp_lines "> $item/"
+                    end
+                end
+
+                set -l tmp_lines_length (expr length "$tmp_lines")
+                if test $tmp_lines_length -gt 0
+                    echo (string sub -s 1 -l (math $tmp_lines_length - 1) $tmp_lines)
+                end
+            end
+        else
+            set -l rec (construct_column_aware_prompt "" $prompt_dir)
+            for item in rec
+                echo $item
+            end
+        end
+    end
+end

.config/fish/functions/fish_prompt.fish

@@ -5,9 +5,20 @@ function fish_prompt --description 'Write out the prompt'
         set prompt_symbol '$'
     end
 
+    set -l prompt_prefix (set_color yellow)(whoami)'@'(set_color purple)(prompt_hostname)' '
+    set -l prompt_dir (set_color green)(prompt_pwd)
+
+    set -l column_aware_prompt (construct_column_aware_prompt $prompt_prefix $prompt_dir)
+
     if test -z $WINDOW
-        printf '%s%s@%s%s %s%s%s %s ' (set_color yellow) (whoami) (set_color purple) (prompt_hostname) (set_color green) (prompt_pwd) (set_color normal) $prompt_symbol
+        for dir in $column_aware_prompt
+            echo $dir
+        end
+
+        set_color normal
+
+        echo $prompt_symbol' '
     else
-        printf '%s%s@%s%s%s (%s)%s%s%s %s ' (set_color yellow) (whoami) (set_color purple) (prompt_hostname) (set_color white) (echo $WINDOW) (set_color green) (prompt_pwd) (set_color normal) $prompt_symbol
+        printf '%s%s@%s%s%s (%s)%s%s%s\n%s ' (set_color yellow) (whoami) (set_color purple) (prompt_hostname) (set_color white) (echo $WINDOW) (set_color green) (prompt_pwd) (set_color normal) $prompt_symbol
     end
 end