1 files changed, 95 insertions, 0 deletions
diff --git a/spring-front/src/components/Editor.js b/spring-front/src/components/Editor.js
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+++ b/spring-front/src/components/Editor.js
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+import React from "react";
+import ReactDOM from "react-dom";
+import hljs from "highlight.js/lib/core";
+import "highlight.js/styles/devibeans.css";
+import markdown from "highlight.js/lib/languages/markdown.js";
+import "../index.css";
+
+hljs.registerLanguage("markdown", markdown);
+
+export default class Editor extends React.Component {
+  constructor(props) {
+    super(props);
+    this.handleInput = this.handleInput.bind(this);
+    this.handleScroll = this.handleScroll.bind(this);
+    this.handleKeyDown = this.handleKeyDown.bind(this);
+    this.updateCodeSyntaxHighlighting =
+      this.updateCodeSyntaxHighlighting.bind(this);
+    this.handleChange = this.handleChange.bind(this);
+    this.state = { value: "" };
+  }
+
+  updateCodeSyntaxHighlighting() {
+    document.querySelectorAll("pre code").forEach((block) => {
+      console.log("block:", block);
+      console.log("blockt text:", block.textContent);
+      hljs.highlightElement(block);
+    });
+  }
+
+  handleChange(event) {
+    this.setState({ value: event.target.value });
+  }
+
+  handleInput(event) {
+    let text = this.state.value;
+    let result_element = document.getElementById("highlight-content");
+    result_element.textContent = text;
+    this.updateCodeSyntaxHighlighting();
+    let result_element_2 = document.querySelector("#highlight");
+    result_element_2.scrollTop = event.currentTarget.scrollTop;
+    result_element_2.scrollLeft = event.currentTarget.scrollLeft;
+  }
+
+  handleScroll(event) {
+    let result_element = document.querySelector("#highlight");
+    result_element.scrollTop = event.currentTarget.scrollTop;
+    result_element.scrollLeft = event.currentTarget.scrollLeft;
+  }
+
+  handleKeyDown(event) {
+    let element = event.currentTarget;
+    let code = this.state.value;
+    if (event.key == "Tab") {
+      event.preventDefault();
+      let before_tab = code.slice(0, element.selectionStart);
+      let after_tab = code.slice(element.selectionEnd, element.value.length);
+      let cursor_pos = element.selectionEnd + 1;
+      element.value = before_tab + "\t" + after_tab;
+      element.selectionStart = cursor_pos;
+      element.selectionEnd = cursor_pos;
+      this.handleInput(element.value, element);
+    }
+  }
+
+  render() {
+    return (
+      <div>
+        <div>
+          <pre id="highlight" aria-hidden="true" direction="rtl">
+            <code
+              id="highlight-content"
+              class="language-markdown"
+              direction="rtl"
+            ></code>
+          </pre>
+          <textarea
+            spellcheck="false"
+            name="editor"
+            className="editor"
+            id="editor"
+            value={this.state.value}
+            onChange={this.handleChange.bind(this)}
+            onInput={this.handleInput.bind(this)}
+            onScroll={this.handleScroll.bind(this)}
+            onKeyDown={this.handleKeyDown.bind(this)}
+            direction="rtl"
+          ></textarea>
+        </div>
+        <div class="split right">
+          <p class="markdown-placeholder">Parsed Markdown goes here!!!</p>
+        </div>
+      </div>
+    );
+  }
+}