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https://github.com/penpot/penpot-exporter-figma-plugin.git
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308fa93625
* Configure linters * Move to older eslint config, add stylelint, correct configuration for editorconfig * simplify packages * improve eslint config * Fix typescript * remove line * github workflow * package-lock.json * lint fix * make plugin compatible with Figma * Add stylelint to ci --------- Co-authored-by: Alex Sánchez <alejandro@runroom.com>
111 lines
3.6 KiB
Markdown
111 lines
3.6 KiB
Markdown
# Developer guide
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The plugin relies in
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[penpot.js](https://github.com/penpot/penpot-exporter-figma-plugin/blob/main/src/penpot.js) library.
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It contains a subset of Penpot frontend app, transpiled into javascript to be used from js code
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(this was easy since the frontend is written in ClojureScript, that has direct translation to
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javascript).
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Basically, it exports the `createFile` function and the `File` data type, that represents a Penpot
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file as it resides in memory inside the frontend app. It has function to create pages and their
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content, and also an `export` function that generates and downloads a .zip archive with the Penpot
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file as svg documents in Penpot annotated format, that you can import directly into Penpot.
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You can see the
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[source of the library at Penpot repo](https://github.com/penpot/penpot/tree/develop/frontend/src/app/libs).
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To see a general description of the data types used in the functions you can see
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[the data model](https://help.penpot.app/technical-guide/data-model/). Their full specifications are
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in the
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[common types module](https://github.com/penpot/penpot/tree/develop/common/src/app/common/types).
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Those types are defined in [Clojure spec](https://clojure.org/guides/spec) format. For those
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unfamiliar with the syntax, here is a small basic guide:
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```clojure
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(s/def ::name string?)
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(s/def ::id uuid?)
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```
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A parameter or attribute called `name` is of type string, and `id` is an _uuid_ string (e.g.
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"000498f3-27fc-8000-8988-ca7d52f46843").
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```clojure
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(s/def ::stroke-alignment #{:center :inner :outer})
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```
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`stroke-alignment` is of an enumerated type, and the valid values are "center", "inner" and "outer".
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```clojure
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(ns app.common.types.shape
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(:require
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[app.common.spec :as us]
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...))
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(s/def ::line-height ::us/safe-number)
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```
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`line-height` is of the type `safe-number`, defined in `app.common.spec` namespace, that here is
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imported with the name `us` (a _safe number_ is a integer or floating point number, with a value not
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too big or small).
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```clojure
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(s/def ::page
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(s/keys :req-un [::id ::name ::objects ::options]))
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```
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`page` is an object with four required arguments: `id`, `name`, `objects` and `options`, whose types
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have to be defined above.
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```clojure
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(s/def ::column
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(s/keys :req-un [::color]
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:opt-un [::size
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::type
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::item-length
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::margin
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::gutter]))
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```
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`column` has one required attribute `color` and five optional ones `size`, `type`, `item-length`,
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`margin` and `gutter`.
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```clojure
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(s/def ::children
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(s/coll-of ::content
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:kind vector?
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:min-count 1))
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```
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`children` is a collection (implemented as a vector) of objects of type `content`, and must have a
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minimun lenght of 1.
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```clojure
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(defmulti animation-spec :animation-type)
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(defmethod animation-spec :dissolve [_]
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(s/keys :req-un [::duration
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::easing]))
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(defmethod animation-spec :slide [_]
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(s/keys :req-un [::duration
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::easing
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::way
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::direction
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::offset-effect]))
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(defmethod animation-spec :push [_]
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(s/keys :req-un [::duration
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::easing
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::direction]))
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(s/def ::animation
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(s/multi-spec animation-spec ::animation-type))
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```
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This is probably the most complex construct. `animation` is a multi schema object. It has an
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attribute called `animation-type` and the rest of the fields depend on its value. For example, if
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`animation-type` is "dissolve", the object must also have a `duration` and an `easing` attribute.
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Other constructs should be more or less auto explicative with this guide and the clojure.spec manual
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linked above.
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