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Create a trait for RenderBox.

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This commit is contained in:
Brian J. Burg 2012-10-09 11:42:01 -07:00
parent 94b0ecd850
commit 2bc9e66257
1 changed files with 24 additions and 15 deletions
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39
src/servo/layout/box.rs
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@ -97,15 +97,19 @@ pub enum RenderBox {
UnscannedTextBox(RenderBoxData, ~str)
}
impl RenderBox {
pure fn d(&self) -> &self/RenderBoxData {
match *self {
GenericBox(ref d) => d,
ImageBox(ref d, _) => d,
TextBox(ref d, _) => d,
UnscannedTextBox(ref d, _) => d,
}
}
trait RenderBoxMethods {
pure fn d(&self) -> &self/RenderBoxData;
pure fn is_replaced() -> bool;
pure fn content_box() -> Rect<au>;
pure fn border_box() -> Rect<au>;
fn get_min_width(&LayoutContext) -> au;
fn get_pref_width(&LayoutContext) -> au;
fn get_used_width() -> (au, au);
fn get_used_height() -> (au, au);
fn build_display_list(&dl::DisplayListBuilder, dirty: &Rect<au>,
offset: &Point2D<au>, &dl::DisplayList);
}
fn RenderBoxData(node: Node, ctx: @FlowContext, id: int) -> RenderBoxData {
@ -120,7 +124,16 @@ fn RenderBoxData(node: Node, ctx: @FlowContext, id: int) -> RenderBoxData {
}
}
impl RenderBox {
impl RenderBox : RenderBoxMethods {
pure fn d(&self) -> &self/RenderBoxData {
match *self {
GenericBox(ref d) => d,
ImageBox(ref d, _) => d,
TextBox(ref d, _) => d,
UnscannedTextBox(ref d, _) => d,
}
}
pure fn is_replaced() -> bool {
match self {
ImageBox(*) => true, // TODO: form elements, etc
@ -238,7 +251,7 @@ impl RenderBox {
/* The box formed by the border edge, as defined in CSS 2.1 Section 8.1.
Coordinates are relative to the owning flow. */
fn border_box() -> Rect<au> {
pure fn border_box() -> Rect<au> {
// TODO: actually compute content_box + padding + border
self.content_box()
}
@ -296,10 +309,6 @@ impl RenderBox {
}
}
trait ImageBoxMethods {
}
/**
* The tree holding render box relations. These are only defined for
* nested CSS boxes that are nested in an otherwise inline flow