From 3c5ac2d94cd2a8ea3026118a11a775f90772ab92 Mon Sep 17 00:00:00 2001
From: Andrey Antukh <niwi@niwi.nz>
Date: Mon, 25 Jan 2016 18:32:17 +0200
Subject: [PATCH] Reimplement the group rendering.

---
 src/uxbox/data/workspace.cljs |  50 ++------------
 src/uxbox/shapes.cljs         |  65 +++++++-----------
 src/uxbox/ui/shapes.cljs      | 126 +++++++++++++---------------------
 3 files changed, 76 insertions(+), 165 deletions(-)

diff --git a/src/uxbox/data/workspace.cljs b/src/uxbox/data/workspace.cljs
index 065bbd0cef..3e5032027a 100644
--- a/src/uxbox/data/workspace.cljs
+++ b/src/uxbox/data/workspace.cljs
@@ -117,7 +117,7 @@
                 (filter #(= (:page %) pageid))
                 (remove :hidden)
                 (remove :blocked)
-                (map sh/resolve-position)
+                (map sh/-outer-rect)
                 (filter #(sh/contained-in? % selrect))
                 (map :id))]
         (->> (into #{} xf (vals (:shapes-by-id state)))
@@ -221,38 +221,6 @@
                  (when x {:x x})
                  (when y {:y y})))))
 
-(defn rebuild-group-size
-  [id]
-  (letfn [(update-shape-pos [state {:keys [id x y] :as data}]
-            (update-in state [:shapes-by-id id] assoc :x x :y y))
-
-          (update-group-size [shape shapes]
-            (let [{:keys [width height]} (sh/group-dimensions shapes)]
-              (assoc shape
-                     :width width
-                     :height height
-                     :view-box [0 0 width height])))
-
-          (update-group [shape shapes x y]
-            (-> shape
-                (update-group-size shapes)
-                (sh/translate-coords x y +)))]
-
-    (reify
-      rs/UpdateEvent
-      (-apply-update [_ state]
-        (let [shape (get-in state [:shapes-by-id id])
-              shapes (map #(get-in state [:shapes-by-id %]) (:items shape))
-              ;; shapes (->> (:items shape)
-              ;;             (map #(get-in state [:shapes-by-id %]))
-              ;;             (map (fn [v] (merge v (sh/container-rect v)))))
-              x (apply min (map :x shapes))
-              y (apply min (map :y shapes))
-              shapes (map #(sh/translate-coords % x y) shapes)]
-          (as-> state $
-            (reduce update-shape-pos $ shapes)
-            (update-in $ [:shapes-by-id id] #(update-group % shapes x y))))))))
-
 ;; TODO: rename fill to "color" for consistency.
 
 (defn update-shape-fill
@@ -319,17 +287,9 @@
   "Mark a shape selected for drawing in the canvas."
   []
   (reify
-    rs/WatchEvent
-    (-apply-watch [_ state]
-      (let [selected (get-in state [:workspace :selected])
-            mevent (rs/swap-state #(assoc-in state [:workspace :selected] #{}))]
-        ;; (rx/just mevent)))))
-        (->> (map #(get-in state [:shapes-by-id %]) selected)
-             (rx/from-coll)
-             (rx/filter :group)
-             (rx/map :group)
-             (rx/map rebuild-group-size)
-             (rx/merge (rx/just mevent)))))))
+    rs/UpdateEvent
+    (-apply-update [_ state]
+      (assoc-in state [:workspace :selected] #{}))))
 
 (defn copy-selected
   "Copy the selected shapes."
@@ -344,7 +304,6 @@
           (map #(add-shape % %) $)
           (rx/from-coll $))))))
 
-
 (defn group-selected
   []
   (letfn [(update-shapes-on-page [state pid selected group]
@@ -357,7 +316,6 @@
             (let [{:keys [x y]} dimensions]
               (reduce (fn [state {:keys [id] :as shape}]
                         (as-> shape $
-                          (sh/translate-coords $ x y)
                           (assoc $ :group group)
                           (assoc-in state [:shapes-by-id id] $)))
                       state
diff --git a/src/uxbox/shapes.cljs b/src/uxbox/shapes.cljs
index 1e1b9186e1..712281f941 100644
--- a/src/uxbox/shapes.cljs
+++ b/src/uxbox/shapes.cljs
@@ -74,12 +74,16 @@
   [shape props]
   (merge shape props))
 
-(defmethod -initialize :builtin/line
+(defmethod -initialize :builtin/group
   [shape {:keys [x y width height]}]
-  (merge shape
-         {:x1 x :y1 y
-          :x2 (+ x width)
-          :y2 (+ y height)}))
+  shape)
+
+;; (defmethod -initialize :builtin/line
+;;   [shape {:keys [x y width height]}]
+;;   (merge shape
+;;          {:x1 x :y1 y
+;;           :x2 (+ x width)
+;;           :y2 (+ y height)}))
 
 (defmethod -move ::shape
   [shape {:keys [dx dy] :as opts}]
@@ -87,13 +91,19 @@
          :x (+ (:x shape) dx)
          :y (+ (:y shape) dy)))
 
-(defmethod -move :builtin/line
+(defmethod -move :builtin/group
   [shape {:keys [dx dy] :as opts}]
   (assoc shape
-         :x1 (+ (:x1 shape) dx)
-         :y1 (+ (:y1 shape) dy)
-         :x2 (+ (:x2 shape) dx)
-         :y2 (+ (:y2 shape) dy)))
+         :dx (+ (:dx shape 0) dx)
+         :dy (+ (:dy shape 0) dy)))
+
+;; (defmethod -move :builtin/line
+;;   [shape {:keys [dx dy] :as opts}]
+;;   (assoc shape
+;;          :x1 (+ (:x1 shape) dx)
+;;          :y1 (+ (:y1 shape) dy)
+;;          :x2 (+ (:x2 shape) dx)
+;;          :y2 (+ (:y2 shape) dy)))
 
 (defmethod -resize ::shape
   [shape {:keys [width height] :as opts}]
@@ -110,26 +120,20 @@
   (assoc shape :rotation rotation))
 
 (declare container-rect)
-(declare resolve-position)
 
 (defmethod -outer-rect ::shape
   [{:keys [group] :as shape}]
-  (as-> shape $
-    (resolve-position $)
-    (container-rect $)))
+  (let [group (get-in @st/state [:shapes-by-id group])]
+    (as-> shape $
+      (assoc $ :x (+ (:x shape) (:dx group 0)))
+      (assoc $ :y (+ (:y shape) (:dy group 0)))
+      (container-rect $))))
 
 (defmethod -outer-rect :builtin/group
-  [{:keys [id group rotation view-box] :as shape}]
+  [{:keys [id group rotation dx dy view-box] :as shape}]
   (let [shapes (->> (:items shape)
                     (map #(get-in @st/state [:shapes-by-id %]))
                     (map -outer-rect))
-
-        crect (-> shape
-                  (resolve-position)
-                  (container-rect))
-
-        shapes (into [crect] shapes)
-
         x (apply min (map :x shapes))
         y (apply min (map :y shapes))
         x' (apply max (map (fn [{:keys [x width]}] (+ x width)) shapes))
@@ -218,8 +222,6 @@
      :x x
      :y y}))
 
-(declare resolve-position)
-
 (defn outer-rect
   [shapes]
   {:pre [(seq shapes)]}
@@ -245,21 +247,6 @@
          y' (:y shape)]
      (assoc shape :x (op x' x) :y (op y' y)))))
 
-(defn resolve-position
-  "Recursively resolve the real shape position in
-  the canvas."
-  [{:keys [width height x y group] :as shape}]
-  (if group
-    (let [group (get-in @st/state [:shapes-by-id group])
-          result (resolve-position
-                  (assoc group
-                         :x (+ (:x group) x)
-                         :y (+ (:y group) y)))]
-      (assoc shape
-             :x (:x result)
-             :y (:y result)))
-    shape))
-
 (defn resolve-parent
   "Recursively resolve the real shape parent."
   [{:keys [group] :as shape}]
diff --git a/src/uxbox/ui/shapes.cljs b/src/uxbox/ui/shapes.cljs
index 2998ebfbe5..a61c7413ad 100644
--- a/src/uxbox/ui/shapes.cljs
+++ b/src/uxbox/ui/shapes.cljs
@@ -4,20 +4,21 @@
             [cuerdas.core :as str]
             [rum.core :as rum]
             [uxbox.state :as st]
-            [uxbox.shapes :as shapes]
+            [uxbox.shapes :as sh]
             [uxbox.ui.icons :as i]
             [uxbox.util.svg :as svg]
+            [uxbox.util.matrix :as mtx]
+            [uxbox.util.math :as mth]
             [uxbox.util.data :refer (remove-nil-vals)]))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Attribute transformations
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
-(defn- extract-attrs
+(defn- extract-style-attrs
   "Extract predefinet attrs from shapes."
   [shape]
-  (select-keys shape [:fill :opacity :stroke :stroke-opacity :stroke-width
-                      :x1 :x2 :y1 :y2 :cx :cy :r]))
+  (select-keys shape [:fill :opacity :stroke :stroke-opacity :stroke-width]))
 
 (defn- make-debug-attrs
   [shape]
@@ -30,96 +31,61 @@
 ;; Implementation
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
-(defmethod shapes/-render :builtin/icon
+(defmethod sh/-render :builtin/icon
   [{:keys [data id] :as shape} _]
   (let [key (str id)
         rfm (svg/calculate-transform shape)
         attrs (merge {:id key :key key :transform rfm}
-                     (extract-attrs shape)
-                     (make-debug-attrs shape))]
+                     ;; (select-keys shape [:x :y :width :height])
+                     (make-debug-attrs shape)
+                     (extract-style-attrs shape))]
     (html
      [:g attrs data])))
 
-(defmethod shapes/-render :builtin/rect
-  [{:keys [id view-box] :as shape} _]
-  (let [key (str id)
-        rfm (svg/calculate-transform shape)
-        attrs (merge {:width (nth view-box 2)
-                      :height (nth view-box 3)
-                      :x 0 :y 0}
-                     (extract-attrs shape)
-                     (make-debug-attrs shape))]
-    (html
-     [:g {:id key :key key :transform rfm}
-      [:rect attrs]])))
 
-(defmethod shapes/-render :builtin/circle
-  [{:keys [id view-box] :as shape} _]
-  (let [key (str id)
-        rfm (svg/calculate-transform shape)
-        attrs (merge (extract-attrs shape)
-                     (make-debug-attrs shape))]
-    (html
-     [:g {:id key :key key :transform rfm}
-      [:circle attrs]])))
+;; FIXME: the impl should be more clear.
 
-(defmethod shapes/-render :builtin/line
-  [{:keys [id view-box] :as shape} _]
-  (let [key (str id)
-        ;; rfm (svg/calculate-transform shape)
-        attrs (extract-attrs shape)]
-        ;; attrs (merge (extract-attrs shape)
-                     ;; (make-debug-attrs shape))]
-    (html
-     [:g {:id key :key key}
-      [:line attrs]])))
+(defmethod sh/-render :builtin/group
+  [{:keys [items id dx dy rotation] :as shape} factory]
+  (letfn [(rotation-matrix []
+            (let [shapes-by-id (get @st/state :shapes-by-id)
+                  shapes (map #(get shapes-by-id %) items)
+                  {:keys [x y width height]} (sh/outer-rect shapes)
+                  center-x (+ x (/ width 2))
+                  center-y (+ y (/ height 2))]
+              (mtx/multiply (svg/translate-matrix center-x center-y)
+                            (svg/rotation-matrix rotation)
+                            (svg/translate-matrix (- center-x)
+                                                  (- center-y)))))
+          (translate-matrix []
+            (svg/translate-matrix (or dx 0) (or dy 0)))
 
-(defmethod shapes/-render :builtin/group
-  [{:keys [items id] :as shape} factory]
-  (let [key (str "group-" id)
-        tfm (svg/calculate-transform shape)
-        attrs (merge {:id key :key key :transform tfm}
-                     (make-debug-attrs shape))
-        shapes-by-id (get @st/state :shapes-by-id)]
-    (html
-     [:g attrs
-      (for [item (->> items
-                      (map #(get shapes-by-id %))
-                      (remove :hidden))]
-        (-> (factory item)
-            (rum/with-key (str (:id item)))))])))
+          (transform []
+            (let [result (mtx/multiply (rotation-matrix)
+                                       (translate-matrix))
+                  result (flatten @result)]
+              (->> (map #(nth result %) [0 3 1 4 2 5])
+                   (str/join ",")
+                   (str/format "matrix(%s)"))))]
+    (let [key (str "group-" id)
+          tfm (transform)
+          attrs (merge {:id key :key key :transform tfm}
+                       (make-debug-attrs shape))
+          shapes-by-id (get @st/state :shapes-by-id)]
+      (html
+       [:g attrs
+        (for [item (->> items
+                        (map #(get shapes-by-id %))
+                        (remove :hidden))]
+          (-> (factory item)
+              (rum/with-key (str (:id item)))))]))))
 
-(defmethod shapes/-render-svg :builtin/icon
+(defmethod sh/-render-svg :builtin/icon
   [{:keys [data id view-box] :as shape}]
   (let [key (str "icon-svg-" id)
         view-box (apply str (interpose " " view-box))
         props {:view-box view-box :id key :key key}
-        attrs (-> shape
-                  (extract-attrs)
-                  (remove-nil-vals)
-                  (merge props))]
+        attrs (merge props
+                     (extract-style-attrs shape))]
     (html
      [:svg attrs data])))
-
-(defmethod shapes/-render-svg :builtin/rect
-  [{:keys [id view-box] :as shape}]
-  (html i/box))
-  ;; (let [key (str "icon-svg-" id)
-  ;;       view (apply str (interpose " " view-box))
-  ;;       props {:view-box view :id key :key key}
-  ;;       attrs (merge {:width (nth view-box 2)
-  ;;                     :height (nth view-box 3)
-  ;;                     :x 0 :y 0}
-  ;;                    (extract-attrs shape)
-  ;;                    (make-debug-attrs shape))]
-  ;;   (html
-  ;;    [:svg props
-  ;;     [:rect attrs]])))
-
-(defmethod shapes/-render-svg :builtin/circle
-  [{:keys [id view-box] :as shape}]
-  (html i/circle))
-
-(defmethod shapes/-render-svg :builtin/line
-  [{:keys [id view-box] :as shape}]
-  (html i/line))