remove 'fast-zip' dependency. (see #26)

Author: Yannick Scherer

project.clj

@@ -6,7 +6,6 @@
   :repositories  {"sonatype-oss-public" "https://oss.sonatype.org/content/groups/public/"}
   :dependencies [[org.clojure/clojure "1.6.0"]
                  [org.clojure/tools.reader "0.8.13"]
-                 [fast-zip "0.5.2"]
                  [potemkin "0.3.11"]]
   :profiles {:dev {:dependencies [[midje "1.6.3" :exclusions [joda-time]]
                                   [joda-time "2.7"]]

src/rewrite_clj/zip.clj

@@ -16,13 +16,13 @@
             [rewrite-clj
              [parser :as p]
              [node :as node]]
-            [fast-zip.core :as z]
+            [clojure.zip :as z]
             [potemkin :refer [import-vars]]))
 
 ;; ## API Facade
 
 (import-vars
-  [fast-zip.core
+  [clojure.zip
    node root]
 
   [rewrite-clj.zip.base
@@ -92,17 +92,17 @@
                :arglists `(quote ~arglists)})]
     `(def ~sym ~base)))
 
-(defbase right* fast-zip.core/right)
-(defbase left* fast-zip.core/left)
-(defbase up* fast-zip.core/up)
-(defbase down* fast-zip.core/down)
-(defbase next* fast-zip.core/next)
-(defbase prev* fast-zip.core/prev)
-(defbase rightmost* fast-zip.core/rightmost)
-(defbase leftmost* fast-zip.core/leftmost)
-(defbase replace* fast-zip.core/replace)
-(defbase edit* fast-zip.core/edit)
-(defbase remove* fast-zip.core/remove)
+(defbase right* clojure.zip/right)
+(defbase left* clojure.zip/left)
+(defbase up* clojure.zip/up)
+(defbase down* clojure.zip/down)
+(defbase next* clojure.zip/next)
+(defbase prev* clojure.zip/prev)
+(defbase rightmost* clojure.zip/rightmost)
+(defbase leftmost* clojure.zip/leftmost)
+(defbase replace* clojure.zip/replace)
+(defbase edit* clojure.zip/edit)
+(defbase remove* clojure.zip/remove)
 
 ;; ## DEPRECATED
 

src/rewrite_clj/zip/base.clj

@@ -4,7 +4,7 @@
              [node :as node]
              [parser :as p]]
             [rewrite-clj.zip.whitespace :as ws]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 ;; ## Zipper
 

src/rewrite_clj/zip/edit.clj

@@ -7,7 +7,7 @@
              [utils :as u]
              [whitespace :as ws]]
             [rewrite-clj.node :as node]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 ;; ## In-Place Modification
 

src/rewrite_clj/zip/find.clj

@@ -4,7 +4,7 @@
              [base :as base]
              [move :as m]]
             [rewrite-clj.node :as node]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 ;; ## Helpers
 

src/rewrite_clj/zip/insert.clj

@@ -3,7 +3,7 @@
              [base :as base]
              [whitespace :as ws]]
             [rewrite-clj.node :as node]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 (def ^:private space
   (node/spaces 1))

src/rewrite_clj/zip/move.clj

@@ -1,7 +1,7 @@
 (ns ^:no-doc rewrite-clj.zip.move
   (:refer-clojure :exclude [next])
   (:require [rewrite-clj.zip.whitespace :as ws]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 (defn right
   "Move right to next non-whitespace/non-comment location."

src/rewrite_clj/zip/remove.clj

@@ -4,7 +4,7 @@
              [move :as m]
              [utils :as u]
              [whitespace :as ws]]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 (defn- remove-trailing-space
   "Remove all whitespace following a given node."

src/rewrite_clj/zip/seq.clj

@@ -6,7 +6,7 @@
              [find :as f]
              [insert :as i]
              [move :as m]]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 ;; ## Predicates
 

src/rewrite_clj/zip/subedit.clj

@@ -1,6 +1,6 @@
 (ns ^:no-doc rewrite-clj.zip.subedit
   (:require [rewrite-clj.zip.base :as base]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 ;; ## Edit Scope
 

src/rewrite_clj/zip/utils.clj

@@ -1,58 +1,26 @@
 (ns ^:no-doc rewrite-clj.zip.utils
-  (:require [fast-zip.core :as z])
-  (:import [fast_zip.core ZipperPath ZipperLocation]))
+  (:require [clojure.zip :as z]))
+
+;; ## Remove
+
+(defn- update-in-path
+  [[node path :as loc] k f]
+  (let [v (get path k)]
+    (if (seq v)
+      (with-meta
+        [node (assoc path k (f v) :changed? true)]
+        (meta loc))
+      loc)))
 
 (defn remove-right
   "Remove right sibling of the current node (if there is one)."
-  [^ZipperLocation zloc]
-  (let [path ^ZipperPath (.path zloc)]
-    (if (zero? (count (.r path)))
-      zloc
-      (ZipperLocation.
-        (.branch? zloc)
-        (.children zloc)
-        (.make-node zloc)
-        (.node zloc)
-        (assoc path :r (clojure.core/next (.r path)) :changed? true)))))
+  [loc]
+  (update-in-path loc :r next))
 
 (defn remove-left
   "Remove left sibling of the current node (if there is one)."
-  [^ZipperLocation zloc]
-  (let [path ^ZipperPath (.path zloc)]
-    (if (zero? (count (.l path)))
-      zloc
-      (ZipperLocation.
-        (.branch? zloc)
-        (.children zloc)
-        (.make-node zloc)
-        (.node zloc)
-        (assoc path :l (pop (.l path)) :changed? true)))))
-
-(defn remove-and-move-left
-  "Remove current node and move left. If current node is at the leftmost
-   location, returns `nil`."
-  [^ZipperLocation zloc]
-  (let [path ^ZipperPath (.path zloc)]
-    (when (pos? (count (.l path)))
-      (ZipperLocation.
-        (.branch? zloc)
-        (.children zloc)
-        (.make-node zloc)
-        (peek (.l path))
-        (assoc path :l (pop (.l path)) :changed? true)))))
-
-(defn remove-and-move-right
-  "Remove current node and move right. If current node is at the rightmost
-   location, returns `nil`."
-  [^ZipperLocation zloc]
-  (let [path ^ZipperPath (.path zloc)]
-    (when (pos? (count (.r path)))
-      (ZipperLocation.
-        (.branch? zloc)
-        (.children zloc)
-        (.make-node zloc)
-        (first (.r path))
-        (assoc path :r (clojure.core/next (.r path)) :changed? true)))))
+  [loc]
+  (update-in-path loc :l pop))
 
 (defn remove-right-while
   "Remove elements to the right of the current zipper location as long as
@@ -75,3 +43,27 @@
         (recur (remove-left zloc))
         zloc)
       zloc)))
+
+;; ## Remove and Move
+
+(defn remove-and-move-left
+  "Remove current node and move left. If current node is at the leftmost
+   location, returns `nil`."
+  [[_ {:keys [l] :as path} :as loc]]
+  (if (seq l)
+    (with-meta
+      [(peek l) (-> path
+                    (update-in [:l] pop)
+                    (assoc :changed? true))]
+      (meta loc))))
+
+(defn remove-and-move-right
+  "Remove current node and move right. If current node is at the rightmost
+   location, returns `nil`."
+  [[_ {:keys [r] :as path} :as loc]]
+  (if (seq r)
+    (with-meta
+      [(first r) (-> path
+                     (update-in [:r] next)
+                     (assoc :changed? true))]
+      (meta loc))))

src/rewrite_clj/zip/walk.clj

@@ -1,5 +1,5 @@
 (ns ^:no-doc rewrite-clj.zip.walk
-  (:require [fast-zip.core :as z]
+  (:require [clojure.zip :as z]
             [rewrite-clj.zip
              [subedit :refer [subedit-node]]
              [move :as m]]))

src/rewrite_clj/zip/whitespace.clj

@@ -1,6 +1,6 @@
 (ns ^:no-doc rewrite-clj.zip.whitespace
   (:require [rewrite-clj.node :as node]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 ;; ## Predicates
 

test/rewrite_clj/regression_test.clj

@@ -3,7 +3,7 @@
             [rewrite-clj
              [node :as node]
              [zip :as z]]
-            [fast-zip.core :as fz]))
+            [clojure.zip :as fz]))
 
 ;; ## Regression Tests for 0.3.x -> 0.4.x
 

test/rewrite_clj/zip/base_test.clj

@@ -2,7 +2,7 @@
   (:require [midje.sweet :refer :all]
             [rewrite-clj.node :as node]
             [rewrite-clj.zip.base :as base]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 (let [n (node/forms-node
           [(node/spaces 3)

test/rewrite_clj/zip/find_test.clj

@@ -1,6 +1,6 @@
 (ns rewrite-clj.zip.find-test
   (:require [midje.sweet :refer :all]
-            [fast-zip.core :as z]
+            [clojure.zip :as z]
             [rewrite-clj.zip
              [base :as base]
              [find :as f]]))

test/rewrite_clj/zip/insert_test.clj

@@ -4,7 +4,7 @@
              [base :as base]
              [move :as m]
              [insert :refer :all]]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 (tabular
   (fact "about whitespace-aware insertion."

test/rewrite_clj/zip/remove_test.clj

@@ -4,7 +4,7 @@
              [base :as base]
              [move :as m]
              [remove :as r]]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 (tabular
   (fact "about whitespace-aware removal."

test/rewrite_clj/zip/subedit_test.clj

@@ -4,7 +4,7 @@
              [base :as base]
              [move :as m]
              [subedit :refer :all]]
-            [fast-zip.core :as z]))
+            [clojure.zip :as z]))
 
 (let [root (base/of-string "[1 #{2 [3 4] 5} 6]")]
   (fact "about modifying subtrees."

test/rewrite_clj/zip/utils_test.clj

@@ -1,6 +1,6 @@
 (ns rewrite-clj.zip.utils-test
   (:require [midje.sweet :refer :all]
-            [fast-zip.core :as z]
+            [clojure.zip :as z]
             [rewrite-clj.zip.utils :refer :all]))
 
 (let [loc (z/down (z/vector-zip '[a b c d]))]

test/rewrite_clj/zip/whitespace_test.clj

@@ -1,6 +1,6 @@
 (ns rewrite-clj.zip.whitespace-test
   (:require [midje.sweet :refer :all]
-            [fast-zip.core :as z]
+            [clojure.zip :as z]
             [rewrite-clj.node :as node]
             [rewrite-clj.zip.whitespace :refer :all]))