🎉 Snap to grid

frontend/src/uxbox/main/ui/workspace/layout_display.cljs

@@ -10,11 +10,12 @@
 (ns uxbox.main.ui.workspace.layout-display
   (:require
    [rumext.alpha :as mf]
-   [uxbox.main.refs :as refs]))
+   [uxbox.main.refs :as refs]
+   [uxbox.util.geom.layout :as ula]))
 
-(mf/defc grid-layout [{:keys [frame zoom params] :as props}]
-  (let [{:keys [color size]} params
-        {color-value :value color-opacity :opacity} (:color params)
+(mf/defc grid-layout [{:keys [frame zoom layout] :as props}]
+  (let [{:keys [color size] :as params} (-> layout :params)
+        {color-value :value color-opacity :opacity} color
         {frame-width :width frame-height :height :keys [x y]} frame]
     [:g.grid
      [:*
@@ -37,49 +38,13 @@
                         :stroke-opacity color-opacity
                         :stroke-width (str (/ 1 zoom))}}])]]))
 
-(defn calculate-column-layout [frame size gutter margin item-width layout-type]
-  (let [{:keys [width height x y]} frame
-        parts (/ width size)
-        item-width (or item-width (+ parts (- gutter) (/ gutter size) (- (/ (* margin 2) size))))
-        item-height height
-        initial-offset (case layout-type
-                         :right (- width (* item-width size) (* gutter (dec size)) margin)
-                         :center (/ (- width (* item-width size) (* gutter (dec size))) 2)
-                         margin)
-        gutter (if (= :stretch layout-type) (/ (- width (* item-width size) (* margin 2)) (dec size)) gutter)
-        next-x (fn [cur-val] (+ initial-offset x (* (+ item-width gutter) cur-val)))
-        next-y (fn [cur-val] y)]
-    [parts item-width item-height next-x next-y]))
-
-(defn calculate-row-layout [frame size gutter margin item-height layout-type]
-  (let [{:keys [width height x y]} frame
-        parts (/ height size)
-        item-width width
-        item-height (or item-height (+ parts (- gutter) (/ gutter size) (- (/ (* margin 2) size))))
-        initial-offset (case layout-type
-                         :right (- height (* item-height size) (* gutter (dec size)) margin)
-                         :center (/ (- height (* item-height size) (* gutter (dec size))) 2)
-                         margin)
-        gutter (if (= :stretch layout-type) (/ (- height (* item-height size) (* margin 2)) (dec size)) gutter)
-        next-x (fn [cur-val] x)
-        next-y (fn [cur-val] (+ initial-offset y (* (+ item-height gutter) cur-val)))]
-    [parts item-width item-height next-x next-y]))
-
-(mf/defc flex-layout [{:keys [frame zoom params orientation]}]
-  (let [{:keys [color size type gutter margin item-width item-height]} params
-        {color-value :value color-opacity :opacity} (:color params)
-
-       ;; calculates the layout configuration
-        [parts item-width item-height next-x next-y]
-        (if (= orientation :column)
-          (calculate-column-layout frame size gutter margin item-width type)
-          (calculate-row-layout frame size gutter margin item-height type))]
-
-    (for [cur-val (range 0 size)]
-      [:rect {:x (next-x cur-val)
-              :y (next-y cur-val)
-              :width item-width
-              :height item-height
+(mf/defc flex-layout [{:keys [frame zoom layout]}]
+  (let [{color-value :value color-opacity :opacity} (-> layout :params :color)]
+    (for [{:keys [x y width height]} (ula/layout-rects frame layout)]
+      [:rect {:x x
+              :y y
+              :width width
+              :height height
               :style {:pointer-events "none"
                       :fill color-value
                       :opacity color-opacity}}])))
@@ -87,14 +52,11 @@
 (mf/defc layout-display [{:keys [frame]}]
   (let [zoom (mf/deref refs/selected-zoom)
         layouts (:layouts frame)]
-    (for [[index {:keys [type display params]}] (map-indexed vector layouts)]
+    (for [[index {:keys [type display] :as layout}] (map-indexed vector layouts)]
       (let [props #js {:key (str (:id frame) "-layout-" index)
                        :frame frame
                        :zoom zoom
-                       :params params
-                       :orientation (cond (= type :column) :column
-                                          (= type :row) :row
-                                          :else nil) }]
+                       :layout layout}]
         (when display
           (case type
             :square [:> grid-layout props]

frontend/src/uxbox/main/ui/workspace/sidebar/options/frame.cljs

@@ -22,7 +22,7 @@
    [uxbox.main.ui.components.dropdown :refer [dropdown]]
    [uxbox.main.ui.workspace.sidebar.options.fill :refer [fill-menu]]
    [uxbox.main.ui.workspace.sidebar.options.stroke :refer [stroke-menu]]
-   [uxbox.main.ui.workspace.sidebar.options.grid-options :refer [grid-options]]))
+   [uxbox.main.ui.workspace.sidebar.options.frame-layouts :refer [frame-layouts]]))
 
 (declare +size-presets+)
 
@@ -204,4 +204,4 @@
    [:& measures-menu {:shape shape}]
    [:& fill-menu {:shape shape}]
    [:& stroke-menu {:shape shape}]
-   [:& grid-options {:shape shape}]])
+   [:& frame-layouts {:shape shape}]])

frontend/src/uxbox/main/ui/workspace/sidebar/options/frame_layouts.cljs

@@ -7,7 +7,7 @@
 ;;
 ;; Copyright (c) 2020 UXBOX Labs SL
 
-(ns uxbox.main.ui.workspace.sidebar.options.grid-options
+(ns uxbox.main.ui.workspace.sidebar.options.frame-layouts
   (:require
    [rumext.alpha :as mf]
    [uxbox.util.dom :as dom]
@@ -49,7 +49,7 @@
          :color {:value "#DE4762"
                  :opacity 0.1}}})
 
-(mf/defc grid-option [{:keys [layout on-change on-remove]}]
+(mf/defc layout-options [{:keys [layout on-change on-remove]}]
   (let [state (mf/use-state {:show-advanced-options false
                              :changes {}})
         {:keys [type display params] :as layout} (d/deep-merge layout (:changes @state))
@@ -169,7 +169,7 @@
        [:button.btn-options "Use default"]
        [:button.btn-options "Set as default"]]]]))
 
-(mf/defc grid-options [{:keys [shape]}]
+(mf/defc frame-layouts [{:keys [shape]}]
   (let [id (:id shape)
         handle-create-layout #(st/emit! (dw/add-frame-layout id))
         handle-remove-layout (fn [index] #(st/emit! (dw/remove-frame-layout id index)))
@@ -181,8 +181,8 @@
 
      [:div.element-set-content
       (for [[index layout] (map-indexed vector (:layouts shape))]
-        [:& grid-option {:key (str (:id shape) "-" index)
-                         :layout layout
-                         :on-change (handle-edit-layout index)
-                         :on-remove (handle-remove-layout index)}])]]))
+        [:& layout-options {:key (str (:id shape) "-" index)
+                            :layout layout
+                            :on-change (handle-edit-layout index)
+                            :on-remove (handle-remove-layout index)}])]]))
 

frontend/src/uxbox/util/geom/layout.cljs

@@ -0,0 +1,49 @@
+;; This Source Code Form is subject to the terms of the Mozilla Public
+;; License, v. 2.0. If a copy of the MPL was not distributed with this
+;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+;;
+;; This Source Code Form is "Incompatible With Secondary Licenses", as
+;; defined by the Mozilla Public License, v. 2.0.
+;;
+;; Copyright (c) 2020 UXBOX Labs SL
+
+(ns uxbox.util.geom.layout)
+
+(defn calculate-column-layout [{:keys [width height x y] :as frame} {:keys [size gutter margin item-width type] :as params}]
+  (let [parts (/ width size)
+        item-width (or item-width (+ parts (- gutter) (/ gutter size) (- (/ (* margin 2) size))))
+        item-height height
+        initial-offset (case type
+                         :right (- width (* item-width size) (* gutter (dec size)) margin)
+                         :center (/ (- width (* item-width size) (* gutter (dec size))) 2)
+                         margin)
+        gutter (if (= :stretch type) (/ (- width (* item-width size) (* margin 2)) (dec size)) gutter)
+        next-x (fn [cur-val] (+ initial-offset x (* (+ item-width gutter) cur-val)))
+        next-y (fn [cur-val] y)]
+    [item-width item-height next-x next-y]))
+
+(defn calculate-row-layout [{:keys [width height x y] :as frame} {:keys [size gutter margin item-height type] :as params}]
+  (let [{:keys [width height x y]} frame
+        parts (/ height size)
+        item-width width
+        item-height (or item-height (+ parts (- gutter) (/ gutter size) (- (/ (* margin 2) size))))
+        initial-offset (case type
+                         :right (- height (* item-height size) (* gutter (dec size)) margin)
+                         :center (/ (- height (* item-height size) (* gutter (dec size))) 2)
+                         margin)
+        gutter (if (= :stretch type) (/ (- height (* item-height size) (* margin 2)) (dec size)) gutter)
+        next-x (fn [cur-val] x)
+        next-y (fn [cur-val] (+ initial-offset y (* (+ item-height gutter) cur-val)))]
+    [item-width item-height next-x next-y]))
+
+(defn layout-rects [frame layout]
+  (let [[item-width item-height next-x next-y]
+        (case (-> layout :type)
+          :column (calculate-column-layout frame (-> layout :params))
+          :row (calculate-row-layout frame (-> layout :params)))]
+    (->>
+     (range 0 (-> layout :params :size))
+     (map #(hash-map :x (next-x %)
+                     :y (next-y %)
+                     :width item-width
+                     :height item-height)))))

frontend/src/uxbox/util/geom/snap_points.cljs

@@ -12,38 +12,31 @@
    [cljs.spec.alpha :as s]
    [clojure.set :as set]
    [uxbox.util.geom.shapes :as gsh]
-   [uxbox.util.geom.point :as gpt]))
+   [uxbox.util.geom.point :as gpt]
+   [uxbox.util.geom.layout :as gla]))
 
-(defn- frame-snap-points [{:keys [x y width height]}]
+(defn- layout-rect-snaps [{:keys [x y width height]}]
   #{(gpt/point x y)
-    (gpt/point (+ x (/ width 2)) y)
     (gpt/point (+ x width) y)
-    (gpt/point (+ x width) (+ y (/ height 2)))
     (gpt/point (+ x width) (+ y height))
-    (gpt/point (+ x (/ width 2)) (+ y height))
-    (gpt/point x (+ y height))
-    (gpt/point x (+ y (/ height 2)))})
+    (gpt/point x (+ y height))})
 
-(defn- frame-snap-points-resize [{:keys [x y width height]} handler]
-  (case handler
-    :top-left (gpt/point x y)
-    :top (gpt/point (+ x (/ width 2)) y)
-    :top-right (gpt/point (+ x width) y)
-    :right (gpt/point (+ x width) (+ y (/ height 2)))
-    :bottom-right (gpt/point (+ x width) (+ y height))
-    :bottom (gpt/point (+ x (/ width 2)) (+ y height))
-    :bottom-left (gpt/point x (+ y height))
-    :left (gpt/point x (+ y (/ height 2)))))
+(defn- layout-snap-points [frame {:keys [type] :as layout}]
+  (mapcat layout-rect-snaps (gla/layout-rects frame layout)))
 
-(def ^:private handler->point-idx
-  {:top-left 0
-   :top 0
-   :top-right 1
-   :right 1
-   :bottom-right 2
-   :bottom 2
-   :bottom-left 3
-   :left 3})
+(defn- frame-snap-points [{:keys [x y width height layouts] :as frame}]
+  (into #{(gpt/point x y)
+          (gpt/point (+ x (/ width 2)) y)
+          (gpt/point (+ x width) y)
+          (gpt/point (+ x width) (+ y (/ height 2)))
+          (gpt/point (+ x width) (+ y height))
+          (gpt/point (+ x (/ width 2)) (+ y height))
+          (gpt/point x (+ y height))
+          (gpt/point x (+ y (/ height 2)))}
+        (->>
+         layouts
+         (filter #(and (not= :grid (:type %)) (:display %)))
+         (mapcat #(layout-snap-points frame %)))))
 
 (defn shape-snap-points
   [shape]