Update zsh functions

.config/zsh/functions/fish_collapsed_pwd

@@ -1,42 +1,28 @@
-# https://zhuanlan.zhihu.com/p/51008087
 () {
-    local pwd="$1"
-    # fix end slash
-    local home="${HOME%/}"
-    local size=${#home}
-    [[ $# == 0 ]] && pwd="$PWD"
-    # fix end slash
-    pwd=${pwd%/}
+    [[ $# == 0 ]] && local pwd="$PWD" || local pwd=$1
+    [[ -z "$pwd" || "$pwd" == "/" ]] && echo $pwd && return
 
-    [[ -z "$pwd" ]] && return
-    if [[ "$pwd" == "/" ]]; then
-        echo "/"
-        return
-    elif [[ "$pwd" == "$home" ]]; then
-        echo "~"
-        return
-    fi
-    [[ "$pwd" == "$home/"* ]] && pwd="~${pwd:$size}"
-    if [[ -n "$BASH_VERSION" ]]; then
-        local IFS="/"
-        local elements=($pwd)
-        local length=${#elements[@]}
-        for ((i=0;i<length-1;i++)); do
-            local elem=${elements[$i]}
-            if [[ ${#elem} -gt 1 ]]; then
+    pwd="${pwd%/}"
+    local home="${HOME%/}"
+    [[ "$pwd" == "$home" ]] && echo "~" && return
+
+    local offset=${#home}
+    [[ "$pwd" == "$home/"* ]] && pwd="~${pwd:$offset}"
+
+    local elements=("${(s:/:)pwd}")
+    local length=${#elements}
+    for i in {1..$((length-1))}; do
+        local elem=${elements[$i]}
+        if [[ ${#elem} > 1 ]]; then
+            local c=${elem:0:1}
+            if [[ $c == '.' ]]; then
+                elements[$i]=${elem:0:2}
+            else
                 elements[$i]=${elem:0:1}
             fi
-        done
-    else
-        local elements=("${(s:/:)pwd}")
-        local length=${#elements}
-        for i in {1..$((length-1))}; do
-            local elem=${elements[$i]}
-            if [[ ${#elem} > 1 ]]; then
-                elements[$i]=${elem[1]}
-            fi
-        done
-    fi
+        fi
+    done
+
     local IFS="/"
     echo "${elements[*]}"
 }