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inflate.cljs
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inflate.cljs
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(ns dumdom.inflate
(:require [cljs.reader :as reader]
[dumdom.core :as dumdom]
[snabbdom]))
(defn- init-node! [element]
(dumdom/set-root-id element)
(.-firstElementChild element))
(extend-type js/NodeList
ISeqable
(-seq [array] (array-seq array 0)))
(defn- vnode [sel data children text elm]
(cond-> {}
(:key data) (assoc :key (reader/read-string (:key data)))
sel (assoc :sel sel)
data (assoc :data data)
children (assoc :children children)
text (assoc :text text)
elm (assoc :elm elm)))
(defn- props [node]
(let [attributes (.-attributes node)
len (.-length attributes)]
(loop [props {}
i 0]
(if (< i len)
(let [attr-name (.-nodeName (aget attributes i))
attr-val (.-nodeValue (aget attributes i))]
(recur
(if (= attr-name "data-dumdom-key")
(assoc props :key (reader/read-string attr-val))
(assoc-in props [:attrs (keyword attr-name)] attr-val))
(inc i)))
props))))
(declare to-vnode)
(defn- element-vnode [node]
(vnode (.toLowerCase (.-tagName node)) (props node) (map to-vnode (.-childNodes node)) nil node))
(defn- to-vnode [node]
(cond
(= 1 (.-nodeType node)) (element-vnode node)
(= 3 (.-nodeType node)) (vnode nil nil nil (.-textContent node) node)
(= 8 (.-nodeType node)) (vnode "!" {} [] (.-textContent node) node)
:default (vnode "" {} [] nil node)))
(defn render [component element]
(let [current-node (or (dumdom/root-node element) (init-node! element))
element-id (.. element -dataset -dumdomId)
vnode (component [element-id] 0)]
(dumdom/patch (clj->js (to-vnode current-node)) vnode)
(dumdom/register-vnode element-id vnode)))