servo: Make Box into a class

Source-Repo: https://github.com/servo/servo
Source-Revision: 6c6f7f99e4edda02b13f44a3ef11e75db7d67b36

servo/src/servo/layout/base.rs

@@ -34,17 +34,25 @@ class appearance {
     }
 }
 
-enum box = {
-    tree: tree::fields<@box>,
-    node: Node,
-    mut bounds: Rect<au>,
-    kind: BoxKind,
-    appearance: appearance
-};
+class Box {
+    let tree: tree::fields<@Box>;
+    let node: Node;
+    let kind: BoxKind;
+    let mut bounds: Rect<au>;
+    let appearance: appearance;
+
+    new(node: Node, kind: BoxKind) {
+        self.tree = tree::empty();
+        self.node = node;
+        self.kind = kind;
+        self.bounds = geometry::zero_rect_au();
+        self.appearance = appearance();
+    }
+}
 
 enum layout_data = {
     mut computed_style: computed_style,
-    mut box: option<@box>
+    mut box: option<@Box>
 };
 
 enum ntree { ntree }
@@ -59,27 +67,27 @@ impl of tree::rd_tree_ops<Node> for ntree {
 }
 
 enum btree { btree }
-impl of tree::rd_tree_ops<@box> for btree {
-    fn each_child(node: @box, f: fn(&&@box) -> bool) {
+impl of tree::rd_tree_ops<@Box> for btree {
+    fn each_child(node: @Box, f: fn(&&@Box) -> bool) {
         tree::each_child(self, node, f)
     }
 
-    fn with_tree_fields<R>(&&b: @box, f: fn(tree::fields<@box>) -> R) -> R {
+    fn with_tree_fields<R>(&&b: @Box, f: fn(tree::fields<@Box>) -> R) -> R {
         f(b.tree)
     }
 }
 
-impl of tree::wr_tree_ops<@box> for btree {
-    fn add_child(node: @box, child: @box) {
+impl of tree::wr_tree_ops<@Box> for btree {
+    fn add_child(node: @Box, child: @Box) {
         tree::add_child(self, node, child)
     }
 
-    fn with_tree_fields<R>(&&b: @box, f: fn(tree::fields<@box>) -> R) -> R {
+    fn with_tree_fields<R>(&&b: @Box, f: fn(tree::fields<@Box>) -> R) -> R {
         f(b.tree)
     }
 }
 
-impl layout_methods_priv for @box {
+impl layout_methods_priv for @Box {
     #[doc="Dumps the box tree, for debugging, with indentation."]
     fn dump_indent(indent: uint) {
         let mut s = "";
@@ -95,7 +103,7 @@ impl layout_methods_priv for @box {
     }
 }
 
-impl layout_methods for @box {
+impl layout_methods for @Box {
     #[doc="The main reflow routine."]
     fn reflow(available_width: au) {
         alt self.kind {
@@ -167,7 +175,7 @@ mod test {
     }
     */
 
-    fn flat_bounds(root: @box) -> [Rect<au>] {
+    fn flat_bounds(root: @Box) -> [Rect<au>] {
         let mut r = [];
         for tree::each_child(btree, root) {|c|
             r += flat_bounds(c);

servo/src/servo/layout/block.rs

@@ -7,7 +7,7 @@ import layout::base::*;     // FIXME: Can't get around import *; resolve bug.
 import util::tree;
 
 #[doc="The public block layout methods."]
-impl block_layout_methods for @box {
+impl block_layout_methods for @Box {
     #[doc="The main reflow routine for block layout."]
     fn reflow_block(available_width: au) {
         assert self.kind == BlockBox;

servo/src/servo/layout/box_builder.rs

@@ -4,8 +4,8 @@ import dom::base::{ElementData, HTMLDivElement, HTMLImageElement, Element, Text,
 import dom::style::{display_type, di_block, di_inline, di_none};
 import dom::rcu::reader_methods;
 import gfx::geometry;
-import layout::base::{BlockBox, BoxKind, InlineBox, IntrinsicBox, NodeMethods, TextBox};
-import layout::base::{appearance, box, btree, ntree, rd_tree_ops, wr_tree_ops};
+import layout::base::{BlockBox, Box, BoxKind, InlineBox, IntrinsicBox, NodeMethods, TextBox};
+import layout::base::{appearance, btree, ntree, rd_tree_ops, wr_tree_ops};
 import layout::style::style::{style_methods};
 import layout::text::text_box;
 import util::tree;
@@ -17,7 +17,7 @@ enum ctxt = {
     // The parent node that we're scanning.
     parent_node: Node,
     // The parent box that these boxes will be added to.
-    parent_box: @box,
+    parent_box: @Box,
 
     //
     // The current anonymous box that we're currently appending inline nodes to.
@@ -25,18 +25,10 @@ enum ctxt = {
     // See CSS2 9.2.1.1.
     //
 
-    mut anon_box: option<@box>
+    mut anon_box: option<@Box>
 };
 
-fn new_box(n: Node, kind: BoxKind) -> @box {
-    @box({tree: tree::empty(),
-          node: n,
-          mut bounds: geometry::zero_rect_au(),
-          kind: kind,
-          appearance: appearance() })
-}
-
-fn create_context(parent_node: Node, parent_box: @box) -> ctxt {
+fn create_context(parent_node: Node, parent_box: @Box) -> ctxt {
     ret ctxt({
         parent_node: parent_node,
         parent_box: parent_box,
@@ -71,14 +63,14 @@ impl methods for ctxt {
                     let anon_box = alt self.anon_box {
                         none {
                           //
-                          // the anonymous box inherits the attributes of its parents for now, so
+                          // The anonymous box inherits the attributes of its parents for now, so
                           // that properties of intrinsic boxes are not spread to their parenting
                           // anonymous box.
                           //
-                          // TODO: check what css actually specifies
+                          // TODO: check what CSS actually specifies
                           //
 
-                          let b = new_box(self.parent_node, InlineBox);
+                          let b = @Box(self.parent_node, InlineBox);
                           self.anon_box = some(b);
                           b
                         }
@@ -178,9 +170,9 @@ impl box_builder_priv for Node {
 
 impl box_builder_methods for Node {
     #[doc="Creates boxes for this node. This is the entry point."]
-    fn construct_boxes() -> @box {
+    fn construct_boxes() -> @Box {
         let box_kind = self.determine_box_kind();
-        let my_box = new_box(self, box_kind);
+        let my_box = @Box(self, box_kind);
         alt box_kind {
             BlockBox | InlineBox {
                 let cx = create_context(self, my_box);

servo/src/servo/layout/inline.rs

@@ -10,7 +10,7 @@ import layout::style::style::*; // ditto
 import util::tree;
 
 #[doc="The main reflow routine for inline layout."]
-impl inline_layout_methods for @box {
+impl inline_layout_methods for @Box {
     fn reflow_inline(available_width: au) {
         assert self.kind == InlineBox;
 

servo/src/servo/layout/layout_task.rs

@@ -5,22 +5,24 @@ them to be rendered
 
 "];
 
-import task::*;
-import comm::*;
-import gfx::geometry::{au, au_to_px, box, px_to_au};
-import geom::point::Point2D;
-import geom::rect::Rect;
-import gfx::renderer;
+import box_builder::box_builder_methods;
+import dl = display_list;
 import dom::base::Node;
 import dom::rcu::scope;
 import dom::style::stylesheet;
+import gfx::geometry::{au, au_to_px, box, px_to_au};
+import gfx::renderer;
 import layout::base::*;
-import layout::style::apply::apply_style_methods;
+import layout::style::apply::ApplyStyleBoxMethods;
 import layout::style::style::style_methods;
-import box_builder::box_builder_methods;
-import dl = display_list;
 import util::color::methods;
 
+import geom::point::Point2D;
+import geom::rect::Rect;
+
+import task::*;
+import comm::*;
+
 enum Msg {
     BuildMsg(Node, stylesheet),
     PingMsg(chan<content::PingMsg>),
@@ -68,7 +70,7 @@ Builds a display list for a box and all its children.
              passed-in box.
 
 "]
-fn build_display_list_from_origin(box: @base::box, origin: Point2D<au>)
+fn build_display_list_from_origin(box: @Box, origin: Point2D<au>)
     -> dl::display_list {
     let box_origin = Point2D(
         px_to_au(au_to_px(origin.x) + au_to_px(box.bounds.origin.x)),
@@ -86,7 +88,7 @@ fn build_display_list_from_origin(box: @base::box, origin: Point2D<au>)
     ret list;
 }
 
-fn build_display_list(box : @base::box) -> dl::display_list {
+fn build_display_list(box : @Box) -> dl::display_list {
     ret build_display_list_from_origin(box, Point2D(au(0), au(0)));
 }
 
@@ -98,8 +100,7 @@ Args:
 -origin: the coordinates of upper-left corner of the passed in box.
 
 "]
-fn box_to_display_item(box: @base::box, origin: Point2D<au>)
-    -> dl::display_item {
+fn box_to_display_item(box: @Box, origin: Point2D<au>) -> dl::display_item {
     let mut item;
 
     #debug("request to display a box from origin %?", origin);
@@ -108,27 +109,26 @@ fn box_to_display_item(box: @base::box, origin: Point2D<au>)
 
     alt (box.appearance.background_image, box.appearance.background_color) {
       (some(image), some(*)) | (some(image), none) {
-	item = dl::display_item({
-	    item_type: dl::display_item_image(~copy *image),
-	    bounds: bounds
-	});
+        item = dl::display_item({
+            item_type: dl::display_item_image(~copy *image),
+            bounds: bounds
+        });
       }
       (none, some(col)) {
         #debug("Assigning color %? to box with bounds %?", col, bounds);
-	item = dl::display_item({
-	    item_type: dl::display_item_solid_color(col.red, col.green,
-                                                    col.blue),
-	    bounds: bounds
-	});
+        item = dl::display_item({
+            item_type: dl::display_item_solid_color(col.red, col.green, col.blue),
+            bounds: bounds
+        });
       }
       (none, none) {
         let r = rand::rng();
-	item = dl::display_item({
-	    item_type: dl::display_item_solid_color(r.next() as u8,
-						    r.next() as u8,
-						    r.next() as u8),
-	    bounds: bounds
-	});
+        item = dl::display_item({
+            item_type: dl::display_item_solid_color(r.next() as u8,
+                                                    r.next() as u8,
+                                                    r.next() as u8),
+            bounds: bounds
+        });
       }
     }
 

servo/src/servo/layout/style/apply.rs

@@ -5,7 +5,7 @@ import image::base::load;
 import layout::base::*;
 import style::style_methods;
 
-impl apply_style_methods for @box {
+impl ApplyStyleBoxMethods for @Box {
     fn apply_style_for_subtree() {
         self.apply_style();
         for btree.each_child(self) {

servo/src/servo/layout/text.rs

@@ -16,7 +16,7 @@ class text_box {
 }
 
 #[doc="The main reflow routine for text layout."]
-impl text_layout_methods for @box {
+impl text_layout_methods for @Box {
     fn reflow_text(_available_width: au, subbox: @text_box) {
         alt self.kind {
             TextBox(*) { /* ok */ }