servo: Stub inline layout computation; move reflow to impls

Source-Repo: https://github.com/servo/servo
Source-Revision: 6340a4a0bdd8feac7ec77b6b188373bf040eebb0

servo/src/servo/layout/base.rs

@@ -1,13 +1,20 @@
 import dom::base::{nk_div, nk_img, node_data, node_kind, node};
 import dom::rcu;
 import dom::rcu::reader_methods;
+import inline::inline_layout_methods;
 import gfx::geom;
 import gfx::geom::{size, rect, point, au};
 import util::{tree};
 
+enum display {
+    di_block,
+    di_inline
+}
+
 enum box = {
     tree: tree::fields<@box>,
     node: node,
+    mut display: display,
     mut bounds: geom::rect<au>
 };
 
@@ -46,6 +53,7 @@ impl of tree::wr_tree_ops<@box> for btree {
 fn new_box(n: node) -> @box {
     @box({tree: tree::empty(),
           node: n,
+          mut display: di_block,
           mut bounds: geom::zero_rect_au()})
 }
 
@@ -64,38 +72,51 @@ fn linked_subtree(p: node) -> @box {
     ret p_box;
 }
 
-fn reflow_block(root: @box, available_width: au) {
-    // Root here is the root of the reflow, not necessarily the doc as
-    // a whole.
-    //
-    // This routine:
-    // - generates root.bounds.size
-    // - generates root.bounds.origin for each child
-    // - and recursively computes the bounds for each child
-
-    let k = root.node.rd() { |r| r.kind };
-    alt k {
-      nk_img(size) {
-        root.bounds.size = size;
-        ret;
-      }
-
-      nk_div { /* fallthrough */ }
+impl block_layout_methods for @box {
+    #[doc="The main reflow routine."]
+    fn reflow(available_width: au) {
+        alt self.display {
+            di_block { self.reflow_block(available_width) }
+            di_inline { self.reflow_inline(available_width) }
+        }
     }
 
-    let mut current_height = 0;
-    for tree::each_child(btree, root) {|c|
-        let mut blk_available_width = available_width;
-        // FIXME subtract borders, margins, etc
-        c.bounds.origin = {mut x: au(0), mut y: au(current_height)};
-        reflow_block(c, blk_available_width);
-        current_height += *c.bounds.size.height;
+    #[doc="The main reflow routine for block layout."]
+    fn reflow_block(available_width: au) {
+        assert self.display == di_block;
+
+        // Root here is the root of the reflow, not necessarily the doc as
+        // a whole.
+        //
+        // This routine:
+        // - generates root.bounds.size
+        // - generates root.bounds.origin for each child
+        // - and recursively computes the bounds for each child
+
+        let k = self.node.rd() { |r| r.kind };
+        alt k {
+          nk_img(size) {
+            self.bounds.size = size;
+            ret;
+          }
+
+          nk_div { /* fallthrough */ }
+        }
+
+        let mut current_height = 0;
+        for tree::each_child(btree, self) {|c|
+            let mut blk_available_width = available_width;
+            // FIXME subtract borders, margins, etc
+            c.bounds.origin = {mut x: au(0), mut y: au(current_height)};
+            c.reflow(blk_available_width);
+            current_height += *c.bounds.size.height;
+        }
+
+        self.bounds.size = {mut width: available_width, // FIXME
+                            mut height: au(current_height)};
+
+        #debug["reflow_block root=%? size=%?", k, self.bounds];
     }
-
-    root.bounds.size = {mut width: available_width, // FIXME
-                        mut height: au(current_height)};
-
-    #debug["reflow_block root=%? size=%?", k, root.bounds];
 }
 
 #[cfg(test)]
@@ -150,7 +171,7 @@ mod test {
         tree::add_child(btree, b3, b1);
         tree::add_child(btree, b3, b2);
 
-        reflow_block(b3, au(100));
+        b3.reflow_block(au(100));
         let fb = flat_bounds(b3);
         #debug["fb=%?", fb];
         assert fb == [geom::box(au(0), au(0), au(10), au(10)),   // n0

servo/src/servo/layout/inline.rs

@@ -0,0 +1,34 @@
+// Inline layout.
+
+import base::*; // FIXME: Can't get around import * due to resolve bug.
+import dom::rcu;
+import dom::rcu::reader_methods;
+import gfx::geom::au;
+import util::tree;
+
+#[doc="The main reflow routine for inline layout."]
+impl inline_layout_methods for @box {
+    fn reflow_inline(available_width: au) {
+        assert self.display == di_inline;
+
+        // FIXME: This is clownshoes inline layout and is not even close to
+        // correct.
+        let y = self.bounds.origin.y;
+        let mut x = 0, inline_available_width = *available_width;
+        let mut current_height = 0;
+        for tree::each_child(btree, self) {
+            |kid|
+            kid.bounds.origin = { mut x: au(x), mut y: y };
+            kid.reflow(au(inline_available_width));
+            inline_available_width -= *kid.bounds.size.width;
+            x += *kid.bounds.size.width;
+            current_height = int::max(current_height, *kid.bounds.size.height);
+        }
+
+        self.bounds.size = { mut width: available_width,
+                             mut height: au(current_height) };
+
+        #debug["reflow_inline root=%? size=%?", self, self.bounds];
+    }
+}
+

servo/src/servo/layout/layout.rs

@@ -12,6 +12,7 @@ import gfx::renderer;
 import dom::base::node;
 import dom::rcu::scope;
 import base::{btree, rd_tree_ops, wr_tree_ops, linked_subtree};
+import base::block_layout_methods;
 import dl = display_list;
 
 enum msg {
@@ -29,7 +30,7 @@ fn layout(to_renderer: chan<renderer::msg>) -> chan<msg> {
               build(node) {
                 #debug("layout: received layout request");
                 let box = linked_subtree(node);
-                base::reflow_block(box, geom::px_to_au(800));
+                box.reflow(geom::px_to_au(800));
                 let dlist = build_display_list(box);
                 to_renderer.send(renderer::render(dlist));
               }

servo/src/servo/servo.rc

@@ -32,6 +32,7 @@ mod image {
 mod layout {
     mod base;
     mod display_list;
+    mod inline;
     mod layout;
 }
 
@@ -51,4 +52,4 @@ mod util {
 
 mod content;
 mod opts;
-mod engine;
+mod engine;