penpot/frontend/src/app/main/ui/shapes/text.cljs
2020-10-30 09:45:52 +01:00

238 lines
8.7 KiB
Clojure

;; 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/.
;;
;; Copyright (c) 2016-2019 Andrey Antukh <niwi@niwi.nz>
(ns app.main.ui.shapes.text
(:require
[clojure.set :as set]
[promesa.core :as p]
[cuerdas.core :as str]
[rumext.alpha :as mf]
[app.main.data.fetch :as df]
[app.main.fonts :as fonts]
[app.main.ui.context :as muc]
[app.main.ui.shapes.group :refer [mask-id-ctx]]
[app.common.data :as d]
[app.common.geom.shapes :as geom]
[app.common.geom.matrix :as gmt]
[app.util.object :as obj]
[app.util.color :as uc]
[app.util.text :as ut]))
;; --- Text Editor Rendering
(defn- generate-root-styles
[data]
(let [valign (obj/get data "vertical-align" "top")
talign (obj/get data "text-align" "flex-start")
base #js {:height "100%"
:width "100%"
:display "flex"}]
(cond-> base
(= valign "top") (obj/set! "alignItems" "flex-start")
(= valign "center") (obj/set! "alignItems" "center")
(= valign "bottom") (obj/set! "alignItems" "flex-end")
(= talign "left") (obj/set! "justifyContent" "flex-start")
(= talign "center") (obj/set! "justifyContent" "center")
(= talign "right") (obj/set! "justifyContent" "flex-end")
(= talign "justify") (obj/set! "justifyContent" "stretch"))))
(defn- generate-paragraph-styles
[data]
(let [base #js {:fontSize "14px"
:margin "inherit"
:lineHeight "1.2"}
lh (obj/get data "line-height")
ta (obj/get data "text-align")]
(cond-> base
ta (obj/set! "textAlign" ta)
lh (obj/set! "lineHeight" lh))))
(defn- generate-text-styles
[data]
(let [letter-spacing (obj/get data "letter-spacing")
text-decoration (obj/get data "text-decoration")
text-transform (obj/get data "text-transform")
line-height (obj/get data "line-height")
font-id (obj/get data "font-id" (:font-id ut/default-text-attrs))
font-variant-id (obj/get data "font-variant-id")
font-family (obj/get data "font-family")
font-size (obj/get data "font-size")
;; Old properties for backwards compatibility
fill (obj/get data "fill")
opacity (obj/get data "opacity" 1)
fill-color (obj/get data "fill-color" fill)
fill-opacity (obj/get data "fill-opacity" opacity)
fill-color-gradient (obj/get data "fill-color-gradient" nil)
fill-color-gradient (when fill-color-gradient
(-> (js->clj fill-color-gradient :keywordize-keys true)
(update :type keyword)))
fill-color-ref-id (obj/get data "fill-color-ref-id")
fill-color-ref-file (obj/get data "fill-color-ref-file")
[r g b a] (uc/hex->rgba fill-color fill-opacity)
background (if fill-color-gradient
(uc/gradient->css (js->clj fill-color-gradient))
(str/format "rgba(%s, %s, %s, %s)" r g b a))
fontsdb (deref fonts/fontsdb)
base #js {:textDecoration text-decoration
:textTransform text-transform
:lineHeight (or line-height "inherit")
"--text-color" background}]
(when (and (string? letter-spacing)
(pos? (alength letter-spacing)))
(obj/set! base "letterSpacing" (str letter-spacing "px")))
(when (and (string? font-size)
(pos? (alength font-size)))
(obj/set! base "fontSize" (str font-size "px")))
(when (and (string? font-id)
(pos? (alength font-id)))
(let [font (get fontsdb font-id)]
(fonts/ensure-loaded! font-id)
(let [font-family (or (:family font)
(obj/get data "fontFamily"))
font-variant (d/seek #(= font-variant-id (:id %))
(:variants font))
font-style (or (:style font-variant)
(obj/get data "fontStyle"))
font-weight (or (:weight font-variant)
(obj/get data "fontWeight"))]
(obj/set! base "fontFamily" font-family)
(obj/set! base "fontStyle" font-style)
(obj/set! base "fontWeight" font-weight))))
base))
(defn get-all-fonts [node]
(let [current-font (if (not (nil? (:font-id node)))
#{(select-keys node [:font-id :font-variant-id])}
#{})
children-font (map get-all-fonts (:children node))]
(reduce set/union (conj children-font current-font))))
(defn fetch-font [font-id font-variant-id]
(let [font-url (fonts/font-url font-id font-variant-id)]
(-> (js/fetch font-url)
(p/then (fn [res] (.text res))))))
(defonce font-face-template "
/* latin */
@font-face {
font-family: '$0';
font-style: $3;
font-weight: $2;
font-display: block;
src: url(/fonts/%(0)s-$1.woff) format('woff');
}
")
(defn get-local-font-css [font-id font-variant-id]
(let [{:keys [family variants]} (get @fonts/fontsdb font-id)
{:keys [name weight style]} (->> variants (filter #(= (:id %) font-variant-id)) first)
css-str (str/format font-face-template [family name weight style])]
(p/resolved css-str)))
(defn embed-font [{:keys [font-id font-variant-id] :or {font-variant-id "regular"}}]
(let [{:keys [backend]} (get @fonts/fontsdb font-id)]
(p/let [font-text (case backend
:google (fetch-font font-id font-variant-id)
(get-local-font-css font-id font-variant-id))
url-to-data (->> font-text
(re-seq #"url\(([^)]+)\)")
(map second)
(map df/fetch-as-data-uri)
(p/all))]
(reduce (fn [text [url data]] (str/replace text url data)) font-text url-to-data))
))
(mf/defc text-node
[{:keys [node index] :as props}]
(let [embed-resources? (mf/use-ctx muc/embed-ctx)
embeded-fonts (mf/use-state nil)
{:keys [type text children]} node]
(mf/use-effect
(mf/deps node)
(fn []
(when (and embed-resources? (= type "root"))
(let [font-to-embed (get-all-fonts node)
font-to-embed (if (empty? font-to-embed) #{ut/default-text-attrs} font-to-embed)
embeded (map embed-font font-to-embed)]
(-> (p/all embeded)
(p/then (fn [result] (reset! embeded-fonts (str/join "\n" result)))))))))
(if (string? text)
(let [style (generate-text-styles (clj->js node))]
[:span.text-node {:style style} (if (= text "") "\u00A0" text)])
(let [children (map-indexed (fn [index node]
(mf/element text-node {:index index :node node :key index}))
children)]
(case type
"root"
(let [style (generate-root-styles (clj->js node))]
[:div.root.rich-text
{:key index
:style style
:xmlns "http://www.w3.org/1999/xhtml"}
[:*
[:style ".text-node { background: var(--text-color); -webkit-text-fill-color: transparent; -webkit-background-clip: text;"]
(when (not (nil? @embeded-fonts))
[:style @embeded-fonts])]
children])
"paragraph-set"
(let [style #js {:display "inline-block"}]
[:div.paragraphs {:key index :style style} children])
"paragraph"
(let [style (generate-paragraph-styles (clj->js node))]
[:p {:key index :style style} children])
nil)))))
(mf/defc text-content
{::mf/wrap-props false
::mf/wrap [mf/memo]}
[props]
(let [root (obj/get props "content")]
[:& text-node {:index 0 :node root}]))
(defn- retrieve-colors
[shape]
(let [colors (into #{} (comp (map :fill)
(filter string?))
(tree-seq map? :children (:content shape)))]
(if (empty? colors)
"#000000"
(apply str (interpose "," colors)))))
(mf/defc text-shape
{::mf/wrap-props false}
[props]
(let [shape (unchecked-get props "shape")
selected? (unchecked-get props "selected?")
mask-id (mf/use-ctx mask-id-ctx)
{:keys [id x y width height rotation content]} shape]
[:foreignObject {:x x
:y y
:data-colors (retrieve-colors shape)
:transform (geom/transform-matrix shape)
:width width
:height height
:mask mask-id}
[:& text-content {:content (:content shape)}]]))