fix issues with changing the yakui viewport

Author: msparkles

crates/yakui-core/src/input/input_state.rs

@@ -260,8 +260,6 @@ impl InputState {
 
     /// Signal that the mouse has moved.
     fn mouse_moved(&self, dom: &Dom, layout: &LayoutDom, pos: Option<Vec2>) {
-        let pos = pos.map(|pos| pos - layout.unscaled_viewport().pos());
-
         {
             let mut mouse = self.mouse.borrow_mut();
             mouse.position = pos;

crates/yakui-core/src/layout/mod.rs

@@ -221,7 +221,7 @@ impl LayoutDom {
     fn resolve_positions(&mut self, dom: &Dom) {
         let mut queue = VecDeque::new();
 
-        queue.push_back((dom.root(), Vec2::ZERO));
+        queue.push_back((dom.root(), self.viewport().pos()));
 
         while let Some((id, parent_pos)) = queue.pop_front() {
             if let Some(layout_node) = self.nodes.get_mut(id.index()) {

crates/yakui-core/src/paint/paint_dom.rs

@@ -100,6 +100,7 @@ impl PaintDom {
             (layout_node.clip.pos() * self.scale_factor).round(),
             (layout_node.clip.size() * self.scale_factor).round(),
         )
+        .constrain(layout.unscaled_viewport());
 
         if layout_node.new_layer {
             self.layers.push();
@@ -224,7 +225,6 @@ impl PaintDom {
 
         let vertices = mesh.vertices.into_iter().map(|mut vertex| {
             let mut pos = vertex.position * self.scale_factor;
-            pos += self.unscaled_viewport.pos();
 
             // Currently, we only round the vertices of geometry fed to the text
             // pipeline because rounding all geometry causes hairline cracks in