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import { Key, KeyStore } from "../../fields/Key";
import { Document } from "../../fields/Document";
import { observer } from "mobx-react";
import { TextField } from "../../fields/TextField";
import React = require("react")
import { action, observable, reaction, IReactionDisposer } from "mobx";
import {schema} from "prosemirror-schema-basic";
import {EditorState, Transaction} from "prosemirror-state"
import {EditorView} from "prosemirror-view"
import {keymap} from "prosemirror-keymap"
import {baseKeymap} from "prosemirror-commands"
import {undo, redo, history} from "prosemirror-history"
import { Opt } from "../../fields/Field";
import "./FieldTextBox.scss"
interface IProps {
fieldKey:Key;
doc:Document;
}
// FieldTextBox: Displays an editable plain text node that maps to a specified Key of a Document
//
// HTML Markup: <FieldTextBox Doc={Document's ID} FieldKey={Key's name + "Key"}
//
// In Code, the node's HTML is specified in the document's parameterized structure as:
// document.SetField(KeyStore.Layout, "<FieldTextBox doc={doc} fieldKey={<KEYNAME>Key} />");
// and the node's binding to the specified document KEYNAME as:
// document.SetField(KeyStore.LayoutKeys, new ListField([KeyStore.<KEYNAME>]));
// The Jsx parser at run time will bind:
// 'fieldKey' property to the Key stored in LayoutKeys
// and 'doc' property to the document that is being rendered
//
// When rendered() by React, this extracts the TextController from the Document stored at the
// specified Key and assigns it to an HTML input node. When changes are made tot his node,
// this will edit the document and assign the new value to that field.
//
export class FieldTextBox extends React.Component<IProps> {
private _ref: React.RefObject<HTMLDivElement>;
private _editorView: Opt<EditorView>;
private _reactionDisposer: Opt<IReactionDisposer>;
constructor(props:IProps) {
super(props);
this._ref = React.createRef();
this.onChange = this.onChange.bind(this);
}
dispatchTransaction = (tx: Transaction) => {
if(this._editorView) {
const state = this._editorView.state.apply(tx);
this._editorView.updateState(state);
const {doc, fieldKey} = this.props;
doc.SetFieldValue(fieldKey, JSON.stringify(state.toJSON()), TextField);
}
}
componentDidMount() {
let state:EditorState;
const {doc, fieldKey} = this.props;
const config = {
schema,
plugins: [
history(),
keymap({"Mod-z": undo, "Mod-y": redo}),
keymap(baseKeymap)
]
};
let field = doc.GetFieldT(fieldKey, TextField);
if(field) {
state = EditorState.fromJSON(config, JSON.parse(field.Data));
} else {
state = EditorState.create(config);
}
if(this._ref.current) {
this._editorView = new EditorView(this._ref.current, {
state,
dispatchTransaction: this.dispatchTransaction
});
}
this._reactionDisposer = reaction(() => {
const field = this.props.doc.GetFieldT(this.props.fieldKey, TextField);
return field ? field.Data : undefined;
}, (field) => {
if(field && this._editorView) {
this._editorView.updateState(EditorState.fromJSON(config, JSON.parse(field)));
}
})
}
componentWillUnmount() {
if(this._editorView) {
this._editorView.destroy();
}
if(this._reactionDisposer) {
this._reactionDisposer();
}
}
shouldComponentUpdate() {
return false;
}
@action
onChange(e: React.ChangeEvent<HTMLInputElement>) {
const {fieldKey, doc} = this.props;
doc.SetFieldValue(fieldKey, e.target.value, TextField);
}
render() {
return (<div className="fieldTextBox-cont" ref={this._ref} />)
}
}
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