From 0697119593c00af15aeb2072e8b42122dde31c66 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Tue, 3 Dec 2024 22:44:36 -0800
Subject: viewer improvements

viewer highlights parsed text;
larger input box
removes some double-display
handles mouse over-run
---
 chapter18/src/main/java/com/seaofnodes/simple/JSViewer.java | 3 +++
 chapter18/src/main/java/com/seaofnodes/simple/Parser.java   | 4 +---
 2 files changed, 4 insertions(+), 3 deletions(-)

(limited to 'chapter18/src/main/java/com')

diff --git a/chapter18/src/main/java/com/seaofnodes/simple/JSViewer.java b/chapter18/src/main/java/com/seaofnodes/simple/JSViewer.java
index 79a84edf..c63b5118 100644
--- a/chapter18/src/main/java/com/seaofnodes/simple/JSViewer.java
+++ b/chapter18/src/main/java/com/seaofnodes/simple/JSViewer.java
@@ -30,6 +30,7 @@ public class JSViewer implements AutoCloseable {
     }
 
     void run( ) throws Exception {
+        SERVER.put("!");
         while( true ) {
             String src = SERVER.get();
             switch( src ) {
@@ -74,6 +75,8 @@ public class JSViewer implements AutoCloseable {
         Collection<Node> all = GraphVisualizer.findAll(P==null ? null : P._xScopes, STOP, P==null ? null : P._scope);
         SB sb = new SB();
         sb.p("digraph view_").p(N++).p(" {\n").ii();
+        if( P!=null )
+            sb.i().p("// POS: ").p(P.pos()).nl();
 
         // To keep the Scopes below the graph and pointing up into the graph we
         // need to group the Nodes in a subgraph cluster, and the scopes into a
diff --git a/chapter18/src/main/java/com/seaofnodes/simple/Parser.java b/chapter18/src/main/java/com/seaofnodes/simple/Parser.java
index 47bfe08e..04af20f7 100644
--- a/chapter18/src/main/java/com/seaofnodes/simple/Parser.java
+++ b/chapter18/src/main/java/com/seaofnodes/simple/Parser.java
@@ -640,7 +640,6 @@ public class Parser {
 
         // A Block scope parse, and inspect the scope afterward for fields.
         _scope.push(true);
-        _xScopes.push(_scope);
         require("{");
         while (!peek('}') && !_lexer.isEOF())
             parseStatement();
@@ -661,7 +660,6 @@ public class Parser {
         // Done with struct/block scope
         require("}");
         require(";");
-        _xScopes.pop();
         _scope.pop();
         return null;
     }
@@ -1183,7 +1181,7 @@ public class Parser {
     private boolean peek(char ch) { return _lexer.peek(ch); }
     private boolean peekIsId() { return _lexer.peekIsId(); }
 
-    private int pos() { return _lexer._position; }
+    public int pos() { return _lexer._position; }
     private int pos(int pos) {
         int old = _lexer._position;
         _lexer._position = pos;
-- 
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