fix zalgotext highlight

src/core/text/edit.rs

@@ -46,8 +46,9 @@ impl Widget for TextEdit {
     fn draw(&mut self, painter: &mut Painter) {
         let base = painter.layer;
         painter.child_layer();
-        let region = self.view.draw(painter);
+        self.view.draw(painter);
         painter.layer = base;
+        let region = self.region();
 
         let size = vec2(1, self.attrs.line_height);
         match self.selection {
@@ -62,7 +63,8 @@ impl Widget for TextEdit {
             }
             TextSelection::Span { start, end } => {
                 let (start, end) = sort_cursors(start, end);
-                for (top_left, width) in iter_layout_lines(start, end, &self.buf) {
+                for (l, x, width) in iter_layout_lines(start, end, &self.buf) {
+                    let top_left = vec2(x, self.attrs.line_height * l as f32);
                     painter.primitive_within(
                         RectPrimitive::color(Color::SKY),
                         size.with_x(width)
@@ -97,34 +99,34 @@ fn iter_layout_lines(
     start: Cursor,
     end: Cursor,
     buf: &TextBuffer,
-) -> impl Iterator<Item = (Vec2, f32)> {
+) -> impl Iterator<Item = (usize, f32, f32)> {
     gen move {
-        let mut iter = buf.layout_runs();
+        let mut iter = buf.layout_runs().enumerate();
-        for line in iter.by_ref() {
+        for (i, line) in iter.by_ref() {
             if line.line_i == start.line
                 && let Some(start_x) = index_x(&line, start.index)
             {
                 if start.line == end.line
                     && let Some(end_x) = index_x(&line, end.index)
                 {
-                    yield (vec2(start_x, line.line_top), end_x - start_x);
+                    yield (i, start_x, end_x - start_x);
                     return;
                 }
-                yield (vec2(start_x, line.line_top), line.line_w - start_x);
+                yield (i, start_x, line.line_w - start_x);
                 break;
             }
         }
-        for line in iter {
+        for (i, line) in iter {
             if line.line_i > end.line {
                 return;
             }
             if line.line_i == end.line
                 && let Some(end_x) = index_x(&line, end.index)
             {
-                yield (vec2(0.0, line.line_top), end_x);
+                yield (i, 0.0, end_x);
                 return;
             }
-            yield (vec2(0.0, line.line_top), line.line_w);
+            yield (i, 0.0, line.line_w);
         }
     }
 }

src/core/text/mod.rs

@@ -35,6 +35,8 @@ impl TextView {
         }
     }
 
+    /// region where the text should be draw
+    /// does not include extra height or width from weird unicode
     pub fn region(&self) -> UiRegion {
         self.tex()
             .map(|t| t.size)