Allow floats to have specified heights

src/components/main/layout/block.rs

@@ -267,7 +267,7 @@ impl BlockFlowData {
         // child[i-1].floats_out -> child[i].floats_in
         // visit child[i]
         // repeat until all children are visited.
-        // last_child.floats_out -> self.floats_out (done at the end of this function)
+        // last_child.floats_out -> self.floats_out (done at the end of this method)
         let mut float_ctx = self.common.floats_in.clone();
         for BlockFlow(self).each_child |kid| {
             do kid.with_mut_base |child_node| {

src/components/main/layout/box_builder.rs

@@ -161,6 +161,18 @@ impl BoxGenerator {
                 assert!(block.box.is_none());
                 block.box = Some(new_box);
             },
+            FloatFlow(float) => {
+                debug!("BoxGenerator[f%d]: point b", float.common.id);
+                let new_box = self.make_box(ctx, box_type, node, self.flow, builder);
+
+                debug!("BoxGenerator[f%d]: attaching box[b%d] to float flow (node: %s)",
+                       float.common.id,
+                       new_box.id(),
+                       node.debug_str());
+
+                assert!(float.box.is_none());
+                float.box = Some(new_box);
+            },
             _ => warn!("push_node() not implemented for flow f%d", self.flow.id()),
         }
     }
@@ -384,7 +396,9 @@ pub impl LayoutTreeBuilder {
             // Inlines that are children of blocks create new flows if their
             // previous sibling was a block.
             (CSSDisplayInline, BlockFlow(*), Some(BlockFlow(*))) |
-            (CSSDisplayInlineBlock, BlockFlow(*), Some(BlockFlow(*))) => {
+            (CSSDisplayInlineBlock, BlockFlow(*), Some(BlockFlow(*))) |
+            (CSSDisplayInline, BlockFlow(*), Some(FloatFlow(*))) |
+            (CSSDisplayInlineBlock, BlockFlow(*), Some(FloatFlow(*))) => {
                 self.create_child_generator(node, parent_generator, Flow_Inline)
             }
 

src/components/main/layout/float.rs

@@ -85,7 +85,7 @@ impl FloatFlowData {
     }
 
     pub fn assign_widths_float(@mut self, _: &LayoutContext) { 
-        debug!("assign_widths_block: assigning width for flow %?",  self.common.id);
+        debug!("assign_widths_float: assigning width for flow %?",  self.common.id);
         // position.size.width is set by parent even though we don't know
         // position.origin yet.
         let mut remaining_width = self.common.position.size.width;
@@ -117,13 +117,13 @@ impl FloatFlowData {
 
                 let width = MaybeAuto::from_width(style.width(), 
                                                   remaining_width).spec_or_default(shrink_to_fit);
+                debug!("assign_widths_float -- width: %?", width);
 
                 model.margin.top = margin_top;
                 model.margin.right = margin_right;
                 model.margin.bottom = margin_bottom;
                 model.margin.left = margin_left;
 
-                self.common.position.size.width = width;
                 x_offset = model.offset();
                 remaining_width = width;
             }
@@ -138,6 +138,8 @@ impl FloatFlowData {
             }
         }
 
+        self.common.position.size.width = remaining_width;
+
         for FloatFlow(self).each_child |kid| {
             //assert!(kid.starts_block_flow() || kid.starts_inline_flow());
 
@@ -170,7 +172,7 @@ impl FloatFlowData {
             }
         }
 
-        let height = cur_y - top_offset;
+        let mut height = cur_y - top_offset;
 
         let mut noncontent_height = Au(0);
         self.box.map(|&box| {
@@ -186,12 +188,23 @@ impl FloatFlowData {
             }
         });
 
-        //TODO(eatkinson): compute heights using the 'height' property.
-        self.common.position.size.height = height + noncontent_height;
+
+        //TODO(eatkinson): compute heights properly using the 'height' property.
+        for self.box.each |&box| {
+
+            let height_prop = 
+                MaybeAuto::from_height(box.style().height(), Au(0)).spec_or_default(Au(0));
+
+            height = geometry::max(height, height_prop) + noncontent_height;
+            debug!("assign_height_float -- height: %?", height);
+            do box.with_mut_base |base| {
+                base.position.size.height = height;
+            }
+        }
 
         let info = PlacementInfo {
             width: self.common.position.size.width,
-            height: self.common.position.size.height,
+            height: height,
             ceiling: Au(0),
             max_width: self.containing_width,
             f_type: FloatLeft,

src/components/main/layout/float_context.rs

@@ -55,7 +55,7 @@ impl FloatContext {
     }
 
     #[inline(always)]
-    fn with_base<R>(&mut self, callback: &fn(&mut FloatContextBase) -> R) -> R {
+    fn with_mut_base<R>(&mut self, callback: &fn(&mut FloatContextBase) -> R) -> R {
         match *self {
             Invalid => fail!("Float context no longer available"),
             Valid(ref mut base) => callback(base)
@@ -72,7 +72,7 @@ impl FloatContext {
 
     #[inline(always)]
     pub fn translate(&mut self, trans: Point2D<Au>) -> FloatContext {
-        do self.with_base |base| {
+        do self.with_mut_base |base| {
             base.translate(trans);
         }
         replace(self, Invalid)
@@ -87,11 +87,18 @@ impl FloatContext {
 
     #[inline(always)]
     pub fn add_float(&mut self, info: &PlacementInfo) -> FloatContext{
-        do self.with_base |base| {
+        do self.with_mut_base |base| {
             base.add_float(info);
         }
         replace(self, Invalid)
     }
+
+    #[inline(always)]
+    pub fn last_float_pos(&mut self) -> Point2D<Au> {
+        do self.with_base |base| {
+            base.last_float_pos()
+        }
+    }
 }
 
 impl FloatContextBase{
@@ -110,6 +117,15 @@ impl FloatContextBase{
         self.offset += trans;
     }
 
+    fn last_float_pos(&self) -> Point2D<Au> {
+        assert!(self.floats_used > 0, "Error: tried to access FloatContext with no floats in it");
+
+        match self.float_data[self.floats_used - 1] {
+            None => fail!("FloatContext error: floats should never be None here"),
+            Some(float) => float.bounds.origin
+        }
+    }
+
     /// Returns a rectangle that encloses the region from top to top + height,
     /// with width small enough that it doesn't collide with any floats. max_x
     /// is the x-coordinate beyond which floats have no effect (generally 

src/components/main/layout/flow.rs

@@ -420,11 +420,17 @@ impl<'self> FlowContext {
                     None => ~"BlockFlow",
                 }
             },
+            FloatFlow(float) => {
+                match float.box {
+                    Some(box) => fmt!("FloatFlow(box=b%d)", box.id()),
+                    None => ~"FloatFlow",
+                }
+            },
             _ => ~"(Unknown flow)"
         };
 
         do self.with_base |base| {
-            fmt!("f%? %? floats %?", base.id, repr, base.num_floats)
+            fmt!("f%? %? floats %? size %?", base.id, repr, base.num_floats, base.position)
         }
     }
 }

src/components/main/layout/model.rs

@@ -20,6 +20,7 @@ use newcss::units::{Em, Pt, Px};
 use newcss::values::{CSSBorderWidth, CSSBorderWidthLength, CSSBorderWidthMedium};
 use newcss::values::{CSSBorderWidthThick, CSSBorderWidthThin};
 use newcss::values::{CSSWidth, CSSWidthLength, CSSWidthPercentage, CSSWidthAuto};
+use newcss::values::{CSSHeight, CSSHeightLength, CSSHeightPercentage, CSSHeightAuto};
 use newcss::values::{CSSMargin, CSSMarginLength, CSSMarginPercentage, CSSMarginAuto};
 use newcss::values::{CSSPadding, CSSPaddingLength, CSSPaddingPercentage};
 /// Encapsulates the borders, padding, and margins, which we collectively call the "box model".
@@ -61,6 +62,17 @@ impl MaybeAuto{
         }
     }
 
+    pub fn from_height(height: CSSHeight, cb_height: Au) -> MaybeAuto{
+        match height {
+            CSSHeightAuto => Auto,
+            CSSHeightPercentage(percent) => Specified(cb_height.scale_by(percent/100.0)),
+            //FIXME(eatkinson): Compute pt and em values properly
+            CSSHeightLength(Px(v)) | 
+            CSSHeightLength(Pt(v)) | 
+            CSSHeightLength(Em(v)) => Specified(Au::from_frac_px(v)),
+        }
+    }
+
     pub fn spec_or_default(&self, default: Au) -> Au{
         match *self{
             Auto => default,