2 files changed, 70 insertions, 14 deletions
diff --git a/www/index.html b/www/index.html
index 01ba57d..1404993 100644
--- a/www/index.html
+++ b/www/index.html
@@ -10,15 +10,24 @@
  grid-template-columns: 1fr 1fr;
  grid-gap: 20px;
 }
+.syntax-node {
+  padding: 0px;
+  padding-left: 20px;
+}
+.syntax-err {
+  color: red;
+}
+pre {
+  padding: 0px;
+  margin: 0px
+}
  </style>
  <body>
    <noscript>This page contains webassembly and javascript content, please enable javascript in your browser.</noscript>
    <script src="./bootstrap.js"></script>
    <div class="grid-container">
      <div id="source-code"></div>
-      <div>
+      <div id="cst">
-        <pre id="cst">
-        </pre>
      </div>
    </div>
    <!-- button id="gen-cst">Generate CST</button -->
diff --git a/www/index.js b/www/index.js
index 2665873..52253c0 100644
--- a/www/index.js
+++ b/www/index.js
@@ -1,5 +1,7 @@
 import {SynNode, put_cst} from "cstea";
 import {EditorState, EditorView, basicSetup} from "@codemirror/basic-setup"
+import {Decoration, DecorationSet} from "@codemirror/view"
+import {StateField, StateEffect} from "@codemirror/state"
 import {rust} from "@codemirror/lang-rust"
 let cst = document.getElementById('cst');
@@ -18,32 +20,77 @@ let view = new EditorView({
  parent: document.getElementById('source-code')
 })
+const doHighlight = StateEffect.define()
+const highlightField = StateField.define({
+  create() {
+    return Decoration.none;
+  },
+  update(highlight, tr) {
+    for (let e of tr.effects) if (e.is(doHighlight)) {
+      return (Decoration.none).update({
+        add: [hlMark.range(e.value.from, e.value.to)]
+      });
+    }
+  },
+  provide: f => EditorView.decorations.from(f)
+})
+const hlMark = Decoration.mark({class: "cm-highlight"})
+const hlTheme = EditorView.baseTheme({
+  ".cm-highlight": { textDecoration: "underline 3px red" }
+})
+function highlightArea(view, textRange) {
+  let effects = [doHighlight.of({from: textRange.start(), to: textRange.end()})];
+  if (!view.state.field(highlightField, false)) {
+    effects.push(StateEffect.appendConfig.of([highlightField, hlTheme]));
+  }
+  view.dispatch({effects});
+}
 function render_cst(synRoot) {
-  cst.innerText += "\n" + synRoot.to_string();
+  let nodeDiv = document.createElement("div");
+  nodeDiv.className = "syntax-node";
+  let r = synRoot.range();
+  let synText = wrap(synRoot.text() + synRoot.range().to_string(), "pre");
+  synText.onmouseover = () => {
+    console.log(r.to_string());
+    highlightArea(view, r);
+  }
+  nodeDiv.appendChild(synText);
  if (!synRoot.is_token()) {
    synRoot.children().forEach(node => {
-      render_cst(node);
+      nodeDiv.appendChild(render_cst(node));
-      return;
    });
-  } else {
-    return;
  }
+  return nodeDiv;
+}
+function wrap(s, tag) {
+  let t = document.createElement(tag);
+  t.innerText = s;
+  return t;
 }
 function render_err(errorList) {
-  cst.innerText = "";
+  let errDiv = document.createElement("div");
+  errDiv.className = "syntax-err";
  errorList.forEach(err => {
-    cst.innerText += "\n" + err.to_string();
+    errDiv.appendChild(wrap(err.to_string(), "pre"));
+    highlightArea(view, err.range());
  });
+  return errDiv;
 }
 function doRender() {
  let sourceFile = view.state.doc.toString();;
-  cst.innerText = "";
+  cst.innerHTML = "";
  try {
-    var synRoot = SynNode.from_str(sourceFile);
+    let synRoot = SynNode.from_str(sourceFile);
-    render_cst(synRoot);
+    cst.appendChild(render_cst(synRoot));
  } catch (synError) {
-    render_err(synError)
+    cst.appendChild(render_err(synError));
  }
 }

diff --git a/www/index.html b/www/index.html index 01ba57d..1404993 100644 --- a/www/index.html +++ b/www/index.html
@@ -10,15 +10,24 @@
10	grid-template-columns: 1fr 1fr;	10	grid-template-columns: 1fr 1fr;
11	grid-gap: 20px;	11	grid-gap: 20px;
12	}	12	}
		13	.syntax-node {
		14	padding: 0px;
		15	padding-left: 20px;
		16	}
		17	.syntax-err {
		18	color: red;
		19	}
		20	pre {
		21	padding: 0px;
		22	margin: 0px
		23	}
13	</style>	24	</style>
14	<body>	25	<body>
15	<noscript>This page contains webassembly and javascript content, please enable javascript in your browser.</noscript>	26	<noscript>This page contains webassembly and javascript content, please enable javascript in your browser.</noscript>
16	<script src="./bootstrap.js"></script>	27	<script src="./bootstrap.js"></script>
17	<div class="grid-container">	28	<div class="grid-container">
18	<div id="source-code"></div>	29	<div id="source-code"></div>
19	<div>	30	<div id="cst">
20	<pre id="cst">
21	</pre>
22	</div>	31	</div>
23	</div>	32	</div>
24	<!-- button id="gen-cst">Generate CST</button -->	33	<!-- button id="gen-cst">Generate CST</button -->


diff --git a/www/index.js b/www/index.js index 2665873..52253c0 100644 --- a/www/index.js +++ b/www/index.js
@@ -1,5 +1,7 @@
1	import {SynNode, put_cst} from "cstea";	1	import {SynNode, put_cst} from "cstea";
2	import {EditorState, EditorView, basicSetup} from "@codemirror/basic-setup"	2	import {EditorState, EditorView, basicSetup} from "@codemirror/basic-setup"
		3	import {Decoration, DecorationSet} from "@codemirror/view"
		4	import {StateField, StateEffect} from "@codemirror/state"
3	import {rust} from "@codemirror/lang-rust"	5	import {rust} from "@codemirror/lang-rust"
4		6
5	let cst = document.getElementById('cst');	7	let cst = document.getElementById('cst');
@@ -18,32 +20,77 @@ let view = new EditorView({
18	parent: document.getElementById('source-code')	20	parent: document.getElementById('source-code')
19	})	21	})
20		22
		23	const doHighlight = StateEffect.define()
		24
		25	const highlightField = StateField.define({
		26	create() {
		27	return Decoration.none;
		28	},
		29	update(highlight, tr) {
		30	for (let e of tr.effects) if (e.is(doHighlight)) {
		31	return (Decoration.none).update({
		32	add: [hlMark.range(e.value.from, e.value.to)]
		33	});
		34	}
		35	},
		36	provide: f => EditorView.decorations.from(f)
		37	})
		38
		39	const hlMark = Decoration.mark({class: "cm-highlight"})
		40
		41	const hlTheme = EditorView.baseTheme({
		42	".cm-highlight": { textDecoration: "underline 3px red" }
		43	})
		44
		45	function highlightArea(view, textRange) {
		46	let effects = [doHighlight.of({from: textRange.start(), to: textRange.end()})];
		47	if (!view.state.field(highlightField, false)) {
		48	effects.push(StateEffect.appendConfig.of([highlightField, hlTheme]));
		49	}
		50	view.dispatch({effects});
		51	}
		52
21	function render_cst(synRoot) {	53	function render_cst(synRoot) {
22	cst.innerText += "\n" + synRoot.to_string();	54	let nodeDiv = document.createElement("div");
		55	nodeDiv.className = "syntax-node";
		56	let r = synRoot.range();
		57	let synText = wrap(synRoot.text() + synRoot.range().to_string(), "pre");
		58	synText.onmouseover = () => {
		59	console.log(r.to_string());
		60	highlightArea(view, r);
		61	}
		62	nodeDiv.appendChild(synText);
23	if (!synRoot.is_token()) {	63	if (!synRoot.is_token()) {
24	synRoot.children().forEach(node => {	64	synRoot.children().forEach(node => {
25	render_cst(node);	65	nodeDiv.appendChild(render_cst(node));
26	return;
27	});	66	});
28	} else {
29	return;
30	}	67	}
		68	return nodeDiv;
		69	}
		70
		71	function wrap(s, tag) {
		72	let t = document.createElement(tag);
		73	t.innerText = s;
		74	return t;
31	}	75	}
32		76
33	function render_err(errorList) {	77	function render_err(errorList) {
34	cst.innerText = "";	78	let errDiv = document.createElement("div");
		79	errDiv.className = "syntax-err";
35	errorList.forEach(err => {	80	errorList.forEach(err => {
36	cst.innerText += "\n" + err.to_string();	81	errDiv.appendChild(wrap(err.to_string(), "pre"));
		82	highlightArea(view, err.range());
37	});	83	});
		84	return errDiv;
38	}	85	}
39		86
40	function doRender() {	87	function doRender() {
41	let sourceFile = view.state.doc.toString();;	88	let sourceFile = view.state.doc.toString();;
42	cst.innerText = "";	89	cst.innerHTML = "";
43	try {	90	try {
44	var synRoot = SynNode.from_str(sourceFile);	91	let synRoot = SynNode.from_str(sourceFile);
45	render_cst(synRoot);	92	cst.appendChild(render_cst(synRoot));
46	} catch (synError) {	93	} catch (synError) {
47	render_err(synError)	94	cst.appendChild(render_err(synError));
48	}	95	}
49	}	96	}