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wax-prosemirror-services/src/FillTheGapQuestionService/components/ContainerEditor.js

+/* eslint-disable react/destructuring-assignment */
+/* eslint-disable react/prop-types */
+
+import React, { useContext, useRef, useEffect } from 'react';
+import styled from 'styled-components';
+import { EditorView } from 'prosemirror-view';
+import { EditorState, TextSelection } from 'prosemirror-state';
+import { StepMap } from 'prosemirror-transform';
+import { keymap } from 'prosemirror-keymap';
+import { baseKeymap } from 'prosemirror-commands';
+import { undo, redo } from 'prosemirror-history';
+import { WaxContext } from 'wax-prosemirror-core';
+
+const EditorWrapper = styled.span`
+  > .ProseMirror {
+    // background: #a6a6a6 !important;
+    // border: 1px solid #a6a6a6;
+    // border-radius: 4px;
+    // box-shadow: none;
+    // color: #fff !important;
+    // display: inline;
+    // min-width: 50px;
+    // padding: 0px 2px 0px 2px !important;
+    // white-space: break-spaces;
+    // width: auto;
+    // word-wrap: break-word;
+
+    &:focus {
+      outline: none;
+    }
+
+    p.empty-node:first-child::before {
+      content: attr(data-content);
+    }
+
+    .empty-node::before {
+      color: rgb(170, 170, 170);
+      float: left;
+      font-style: italic;
+      height: 0px;
+      pointer-events: none;
+    }
+  }
+`;
+
+const EditorComponent = ({ node, view, getPos }) => {
+  const editorRef = useRef();
+
+  const context = useContext(WaxContext);
+  let gapContainerView;
+  const questionId = node.attrs.id;
+  const isEditable = context.view.main.props.editable(editable => {
+    return editable;
+  });
+
+  let finalPlugins = [];
+
+  const createKeyBindings = () => {
+    const keys = getKeys();
+    Object.keys(baseKeymap).forEach(key => {
+      keys[key] = baseKeymap[key];
+    });
+    return keys;
+  };
+
+  const getKeys = () => {
+    return {
+      'Mod-z': () => undo(view.state, view.dispatch),
+      'Mod-y': () => redo(view.state, view.dispatch),
+    };
+  };
+
+  const plugins = [keymap(createKeyBindings()), ...context.app.getPlugins()];
+
+  finalPlugins = finalPlugins.concat([...plugins]);
+
+  const { activeViewId } = context;
+
+  useEffect(() => {
+    gapContainerView = new EditorView(
+      {
+        mount: editorRef.current,
+      },
+      {
+        editable: () => isEditable,
+        state: EditorState.create({
+          doc: node,
+          plugins: finalPlugins,
+        }),
+        // This is the magic part
+        dispatchTransaction,
+        disallowedTools: ['Images', 'Lists', 'lift', 'Tables', 'FillTheGap'],
+        handleDOMEvents: {
+          mousedown: () => {
+            context.view[activeViewId].dispatch(
+              context.view[activeViewId].state.tr.setSelection(
+                TextSelection.between(
+                  context.view[activeViewId].state.selection.$anchor,
+                  context.view[activeViewId].state.selection.$head,
+                ),
+              ),
+            );
+            context.updateView({}, questionId);
+            // Kludge to prevent issues due to the fact that the whole
+            // footnote is node-selected (and thus DOM-selected) when
+            // the parent editor is focused.
+            if (gapContainerView.hasFocus()) gapContainerView.focus();
+          },
+        },
+
+        attributes: {
+          spellcheck: 'false',
+        },
+      },
+    );
+
+    // Set Each note into Wax's Context
+    context.updateView(
+      {
+        [questionId]: gapContainerView,
+      },
+      questionId,
+    );
+    gapContainerView.focus();
+  }, []);
+
+  const dispatchTransaction = tr => {
+    const { state, transactions } = gapContainerView.state.applyTransaction(tr);
+    gapContainerView.updateState(state);
+    context.updateView({}, questionId);
+
+    if (!tr.getMeta('fromOutside')) {
+      const outerTr = view.state.tr;
+      const offsetMap = StepMap.offset(getPos() + 1);
+      for (let i = 0; i < transactions.length; i++) {
+        const { steps } = transactions[i];
+        for (let j = 0; j < steps.length; j++)
+          outerTr.step(steps[j].map(offsetMap));
+      }
+      if (outerTr.docChanged)
+        view.dispatch(outerTr.setMeta('outsideView', questionId));
+    }
+  };
+
+  return (
+    <EditorWrapper>
+      <div ref={editorRef} />
+    </EditorWrapper>
+  );
+};
+
+export default EditorComponent;