[CodeEditor] generic code editor, not only markdown will be supported

Also, html code element edits text properly (no state, just refs which
prevents cursor jumping).

dist/styles/MarkdownEditor.css

-.markdown-editor {
+.code-editor {
   display: flex;
   width: 100%;
 }
-.markdown-editor .md {
+.code-editor .code {
   width: 40%;
 }
-.markdown-editor .html {
+.code-editor .code code {
+  background-color: #f7f7f9;
+  color: #000;
+  display: block;
+  height: 500px;
+}
+.code-editor .html {
   margin-left: 25px;
   padding-left: 25px;
   width: 60%;
 }
-.markdown-editor .html ul li {
+.code-editor .html ul li {
   list-style: disc !important;
 }
-.markdown-editor .html ol li {
+.code-editor .html ol li {
   list-style: decimal !important;
 }
 

dist/styles/MarkdownEditor.sass

-.markdown-editor
+.code-editor
   display: flex
   width: 100%
-  .md
+  .code
+    code
+      background-color: #f7f7f9
+      color: #000
+      display: block
+      height: 500px
     width: 40%
   .html
     margin-left: 25px

src/Gargantext/Components/MarkdownEditor.purs → src/Gargantext/Components/CodeEditor.purs

-module Gargantext.Components.MarkdownEditor where
+module Gargantext.Components.CodeEditor where
 
 import Data.Either (either, Either(..))
 import Data.Maybe (Maybe(..))
 import Data.Nullable (Nullable, null, toMaybe)
 import Data.Tuple (fst)
 import Data.Tuple.Nested ((/\))
-import DOM.Simple.Console (log2)
+import DOM.Simple.Console (log, log2)
 import DOM.Simple.Types (Element)
 import Effect (Effect)
 import FFI.Simple ((.=), delay)
@@ -19,9 +19,12 @@ import Text.Smolder.Renderer.String (render)
 
 import Gargantext.Utils.Reactix as R2
 
+data CodeType = Markdown
+
 type Props =
-  ( md :: String
-  , nodeId :: Int
+  ( code :: String
+  , codeType :: CodeType
+  , onChange :: String -> Effect Unit
   )
 
 compileMd' :: forall e. MD.ToMarkupOptions e -> String -> String
@@ -32,37 +35,61 @@ compileMd' options input =
 compileMd :: String -> String
 compileMd = compileMd' MD.defaultToMarkupOptions
 
-markdownEditor :: Record Props -> R.Element
-markdownEditor p = R.createElement markdownEditorCpt p []
+codeEditor :: Record Props -> R.Element
+codeEditor p = R.createElement codeEditorCpt p []
 
-markdownEditorCpt :: R.Component Props
-markdownEditorCpt = R.hooksComponent "G.C.MarkdownEditor" cpt
+codeEditorCpt :: R.Component Props
+codeEditorCpt = R.hooksComponent "G.C.CodeEditor" cpt
   where
-    cpt {md, nodeId} _ = do
-      ref <- R.useRef null
-      editedMd <- R.useState' md
+    cpt {code, codeType, onChange} _ = do
+      htmlRef <- R.useRef null
+      codeRef <- R.useRef null
+      editorCodeRef <- R.useRef code
 
       -- Note: delay is necessary here, otherwise initially the HTML won't get
       -- rendered (mDiv is still null)
       R.useEffect $ delay unit $ \_ -> do
-        let mDiv = toMaybe $ R.readRef ref
-        case mDiv of
+        let mHtmlEl = toMaybe $ R.readRef htmlRef
+        case mHtmlEl of
           Nothing -> pure $ pure unit
-          Just d -> do
-            _ <- pure $ (d .= "innerHTML") $ compileMd $ fst editedMd
+          Just htmlEl -> do
+            _ <- pure $ (htmlEl .= "innerHTML") $ compileMd code
             pure $ pure unit
 
-      pure $ H.div { className: "markdown-editor" } [
-        H.div { className: "md" } [
-          H.textarea { className: "form-control"
+      R.useEffectOnce $ delay unit $ \_ -> do
+        let mCodeEl = toMaybe $ R.readRef codeRef
+        case mCodeEl of
+          Nothing -> pure $ pure unit
+          Just codeEl -> do
+            _ <- pure $ (codeEl .= "innerText") code
+            pure $ pure unit
+
+      pure $ H.div { className: "code-editor" } [
+        H.div { className: "code" } [
+          H.code { className: ""
+                 , contentEditable: "true"
+                 , ref: codeRef
                  , rows: 30
-                     , on: {change: onChange ref editedMd} } [ H.text $ fst editedMd ]
+                 , on: { change: onEditChange codeRef htmlRef editorCodeRef
+                       , input: onEditChange codeRef htmlRef editorCodeRef }
+                 } []
         ]
-      , H.div { ref, className: "html" } []
+      , H.div { ref: htmlRef, className: "html" } []
       ]
 
-    onChange :: forall e. R.Ref (Nullable Element) -> R.State String -> e -> Effect Unit
-    onChange ref (_ /\ setEditedMd) e = do
-      setEditedMd $ const value
-      where
-        value = R2.unsafeEventValue e
+    onEditChange :: forall e. R.Ref (Nullable Element) -> R.Ref (Nullable Element) -> R.Ref String -> e -> Effect Unit
+    onEditChange codeRef htmlRef editorCodeRef e = do
+      log2 "[onChange] e" e
+      let mCode = toMaybe $ R.readRef codeRef
+      case mCode of
+        Nothing -> log "[onChange] mCode = Nothing"
+        Just code -> do
+          R.setRef editorCodeRef $ R2.innerText code
+          pure unit
+      let mHtml = toMaybe $ R.readRef htmlRef
+      case mHtml of
+        Nothing -> pure unit
+        Just html -> do
+          _ <- pure $ (html .= "innerHTML") $ compileMd $ R.readRef editorCodeRef
+          pure unit
+      pure unit

src/Gargantext/Components/Nodes/Corpus.purs

@@ -4,12 +4,13 @@ import Prelude ((<<<))
 import Data.Argonaut (class DecodeJson, decodeJson, (.:), (.:?))
 import Data.Array (head)
 import Data.Maybe (Maybe(..))
+import DOM.Simple.Console (log2)
 import Effect.Aff (Aff, throwError)
 import Effect.Exception (error)
 import Reactix as R
 import Reactix.DOM.HTML as H
 import Gargantext.Prelude
-import Gargantext.Components.MarkdownEditor (markdownEditor)
+import Gargantext.Components.CodeEditor as CE
 import Gargantext.Components.Node (NodePoly(..), HyperdataList)
 import Gargantext.Types (NodeType(..), AffTableResult)
 import Gargantext.Routes (SessionRoute(NodeAPI, Children))
@@ -26,11 +27,13 @@ corpusLayoutCpt = R.staticComponent "G.P.Corpus.corpusLayout" cpt
     cpt {nodeId} _ =
       H.div {}
       [
-        markdownEditor {md, nodeId}
+        CE.codeEditor {code, codeType: CE.Markdown, onChange}
         --H.iframe { src: gargMd , width: "100%", height: "100%", style: {"border-style": "none"}} []
       ]
     gargMd = "https://hackmd.iscpif.fr/g9Aah4iwQtCayIzsKQjA0Q#"
-    md = "# Hello world"
+    code = "# Hello world\n\n## subtitle\n\n- item 1\n- item 2\n\n1. num 1\n2. num 2\n\n[purescript link](https://purescript.org)"
+    onChange c = do
+      log2 "[corpusLayoutCpt] c" c
 
 newtype CorpusInfo =
   CorpusInfo

src/Gargantext/Utils/Reactix.js

@@ -7,4 +7,9 @@ function addRootElement(rootElem) {
   );
 }
 
+function getSelection(_u) {
+  return window.getSelection();
+}
+
 exports._addRootElement = addRootElement;
+exports._getSelection = getSelection;

src/Gargantext/Utils/Reactix.purs

@@ -16,7 +16,7 @@ import Effect (Effect)
 import Effect.Aff (Aff, launchAff, launchAff_, killFiber)
 import Effect.Class (liftEffect)
 import Effect.Exception (error)
-import Effect.Uncurried (EffectFn1, runEffectFn1, mkEffectFn1, mkEffectFn2)
+import Effect.Uncurried (EffectFn1, runEffectFn1, mkEffectFn1, EffectFn2, runEffectFn2, mkEffectFn2)
 import FFI.Simple ((..), (...), defineProperty, delay, args2, args3)
 import Partial.Unsafe (unsafePartial)
 import React (class ReactPropFields, Children, ReactClass, ReactElement)
@@ -232,3 +232,13 @@ row children = H.div { className: "row" } children
 
 col12 :: Array R.Element -> R.Element
 col12 children = H.div { className: "col-md-12" } children
+
+innerText :: DOM.Element -> String
+innerText e = e .. "innerText"
+
+foreign import data Selection :: Type
+
+getSelection :: Unit -> Effect Selection
+getSelection = runEffectFn1 _getSelection
+
+foreign import _getSelection :: EffectFn1 Unit Selection