hold shift to select text

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();
-        for line in iter.by_ref() {
+        let mut iter = buf.layout_runs().enumerate();
+        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);
         }
     }
 }
@@ -200,18 +202,35 @@ impl<'a> TextEditCtx<'a> {
         self.text.selection.clear();
     }
 
-    pub fn motion(&mut self, motion: Motion) {
+    pub fn motion(&mut self, motion: Motion, select: bool) {
         if let TextSelection::Pos(cursor) = self.text.selection
-            && let Some(cursor) = self.buf_motion(cursor, motion)
+            && let Some(new) = self.buf_motion(cursor, motion)
         {
-            self.text.selection = TextSelection::Pos(cursor);
+            if select {
+                self.text.selection = TextSelection::Span {
+                    start: cursor,
+                    end: new,
+                };
+            } else {
+                self.text.selection = TextSelection::Pos(new);
+            }
         } else if let TextSelection::Span { start, end } = self.text.selection {
-            let (start, end) = sort_cursors(start, end);
-            let sel = &mut self.text.selection;
-            match motion {
-                Motion::Left | Motion::LeftWord => *sel = TextSelection::Pos(start),
-                Motion::Right | Motion::RightWord => *sel = TextSelection::Pos(end),
-                _ => (),
+            if select {
+                if let Some(cursor) = self.buf_motion(end, motion) {
+                    self.text.selection = TextSelection::Span { start, end: cursor };
+                }
+            } else {
+                let (start, end) = sort_cursors(start, end);
+                let sel = &mut self.text.selection;
+                match motion {
+                    Motion::Left | Motion::LeftWord => *sel = TextSelection::Pos(start),
+                    Motion::Right | Motion::RightWord => *sel = TextSelection::Pos(end),
+                    _ => {
+                        if let Some(cursor) = self.buf_motion(end, motion) {
+                            self.text.selection = TextSelection::Pos(cursor);
+                        }
+                    }
+                }
             }
         }
     }
@@ -277,7 +296,7 @@ impl<'a> TextEditCtx<'a> {
             edit_line(line, line_text);
             if mov {
                 for _ in 0..text.chars().count() {
-                    self.motion(Motion::Right);
+                    self.motion(Motion::Right, false);
                 }
             }
         }
@@ -300,7 +319,7 @@ impl<'a> TextEditCtx<'a> {
             && let TextSelection::Pos(cursor) = &mut self.text.selection
             && (cursor.index != 0 || cursor.line != 0)
         {
-            self.motion(if word { Motion::LeftWord } else { Motion::Left });
+            self.motion(if word { Motion::LeftWord } else { Motion::Left }, false);
             self.delete(word);
         }
     }
@@ -442,20 +461,20 @@ impl<'a> TextEditCtx<'a> {
                 }
                 NamedKey::ArrowRight => {
                     if modifiers.control {
-                        self.motion(Motion::RightWord)
+                        self.motion(Motion::RightWord, modifiers.shift)
                     } else {
-                        self.motion(Motion::Right)
+                        self.motion(Motion::Right, modifiers.shift)
                     }
                 }
                 NamedKey::ArrowLeft => {
                     if modifiers.control {
-                        self.motion(Motion::LeftWord)
+                        self.motion(Motion::LeftWord, modifiers.shift)
                     } else {
-                        self.motion(Motion::Left)
+                        self.motion(Motion::Left, modifiers.shift)
                     }
                 }
-                NamedKey::ArrowUp => self.motion(Motion::Up),
-                NamedKey::ArrowDown => self.motion(Motion::Down),
+                NamedKey::ArrowUp => self.motion(Motion::Up, modifiers.shift),
+                NamedKey::ArrowDown => self.motion(Motion::Down, modifiers.shift),
                 NamedKey::Escape => {
                     self.deselect();
                     return TextInputResult::Unfocus;
@@ -472,6 +491,13 @@ impl<'a> TextEditCtx<'a> {
                                 return TextInputResult::Copy(content);
                             }
                         }
+                        "x" => {
+                            if let TextSelection::Span { start, end } = self.text.selection {
+                                let content = self.text.select_content(start, end);
+                                self.clear_span();
+                                return TextInputResult::Copy(content);
+                            }
+                        }
                         "a" => {
                             if !self.text.buf.lines[0].text().is_empty()
                                 || self.text.buf.lines.len() > 1

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)