Revert D20016281: Fix iOS double-space quick-type bug

Differential Revision:
D20016281

Original commit changeset: aeefd5c3f17c

fbshipit-source-id: b39208ab5c59a462b59d05d0db4c9bab9ffe42a7

Author: nmn

src/component/handlers/composition/DraftEditorCompositionHandler.js

@@ -46,8 +46,6 @@ const RESOLVE_DELAY = 20;
 let resolved = false;
 let stillComposing = false;
 let domObserver = null;
-let beforeInputData = null;
-let compositionEndData = null;
 
 function startDOMObserver(editor: DraftEditor) {
   if (!domObserver) {
@@ -57,14 +55,11 @@ function startDOMObserver(editor: DraftEditor) {
 }
 
 const DraftEditorCompositionHandler = {
-  onBeforeInput(_editor: DraftEditor, e: SyntheticInputEvent<>): void {
-    beforeInputData = (beforeInputData || '') + e.data;
-  },
   /**
    * A `compositionstart` event has fired while we're still in composition
    * mode. Continue the current composition session to prevent a re-render.
    */
-  onCompositionStart(editor: DraftEditor): void {
+  onCompositionStart: function(editor: DraftEditor): void {
     stillComposing = true;
     startDOMObserver(editor);
   },
@@ -83,13 +78,9 @@ const DraftEditorCompositionHandler = {
    * twice could break the DOM, we only use the first event. Example: Arabic
    * Google Input Tools on Windows 8.1 fires `compositionend` three times.
    */
-  onCompositionEnd(editor: DraftEditor, e: SyntheticInputEvent<>): void {
+  onCompositionEnd: function(editor: DraftEditor): void {
     resolved = false;
     stillComposing = false;
-
-    // Use e.data from the first compositionend event seen
-    compositionEndData = compositionEndData ?? e?.data ?? null;
-
     setTimeout(() => {
       if (!resolved) {
         DraftEditorCompositionHandler.resolveComposition(editor);
@@ -104,7 +95,7 @@ const DraftEditorCompositionHandler = {
    * the arrow keys are used to commit, prevent default so that the cursor
    * doesn't move, otherwise it will jump back noticeably on re-render.
    */
-  onKeyDown(editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
+  onKeyDown: function(editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
     if (!stillComposing) {
       // If a keydown event is received after compositionend but before the
       // 20ms timer expires (ex: type option-E then backspace, or type A then
@@ -125,7 +116,7 @@ const DraftEditorCompositionHandler = {
    * characters that we do not want. `preventDefault` allows the composition
    * to be committed while preventing the extra characters.
    */
-  onKeyPress(_editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
+  onKeyPress: function(editor: DraftEditor, e: SyntheticKeyboardEvent<>): void {
     if (e.which === Keys.RETURN) {
       e.preventDefault();
     }
@@ -146,7 +137,7 @@ const DraftEditorCompositionHandler = {
    * Resetting innerHTML will move focus to the beginning of the editor,
    * so we update to force it back to the correct place.
    */
-  resolveComposition(editor: DraftEditor): void {
+  resolveComposition: function(editor: DraftEditor): void {
     if (stillComposing) {
       return;
     }
@@ -155,36 +146,12 @@ const DraftEditorCompositionHandler = {
     domObserver = null;
     resolved = true;
 
-    const composedChars = beforeInputData ?? compositionEndData;
-    beforeInputData = null;
-    compositionEndData = null;
-
     let editorState = EditorState.set(editor._latestEditorState, {
       inCompositionMode: false,
     });
 
     editor.exitCurrentMode();
 
-    if (composedChars != null) {
-      const currentStyle = editorState.getCurrentInlineStyle();
-      const entityKey = getEntityKeyForSelection(
-        editorState.getCurrentContent(),
-        editorState.getSelection(),
-      );
-      // If characters have been composed, re-rendering with the update
-      // is sufficient to reset the editor.
-      const contentState = DraftModifier.replaceText(
-        editorState.getCurrentContent(),
-        editorState.getSelection(),
-        composedChars,
-        currentStyle,
-        entityKey,
-      );
-      editor.update(
-        EditorState.push(editorState, contentState, 'insert-characters'),
-      );
-    }
-
     if (!mutations.size) {
       editor.update(editorState);
       return;