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Auto merge of #6443 - Ms2ger:cleanup-layout, r=pcwalton

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Various layout cleanup.



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This commit is contained in:
bors-servo 2015-06-24 03:00:32 -06:00
commit 469b9550f6
9 changed files with 207 additions and 287 deletions
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4
components/layout/construct.rs
View file

@ -16,7 +16,7 @@
use block::BlockFlow;
use context::LayoutContext;
use css::node_style::StyledNode;
use data::{HAS_NEWLY_CONSTRUCTED_FLOW, LayoutDataAccess, LayoutDataWrapper};
use data::{HAS_NEWLY_CONSTRUCTED_FLOW, LayoutDataWrapper};
use floats::FloatKind;
use flow::{Descendants, AbsDescendants};
use flow::{Flow, ImmutableFlowUtils, MutableFlowUtils, MutableOwnedFlowUtils};
@ -41,7 +41,7 @@ use table_row::TableRowFlow;
use table_rowgroup::TableRowGroupFlow;
use table_wrapper::TableWrapperFlow;
use text::TextRunScanner;
use wrapper::{PostorderNodeMutTraversal, PseudoElementType, TLayoutNode, ThreadSafeLayoutNode};
use wrapper::{PostorderNodeMutTraversal, PseudoElementType, ThreadSafeLayoutNode};
use gfx::display_list::OpaqueNode;
use script::dom::characterdata::CharacterDataTypeId;

6
components/layout/css/matching.rs
View file

@ -9,11 +9,11 @@
use animation;
use context::SharedLayoutContext;
use css::node_style::StyledNode;
use data::{LayoutDataAccess, LayoutDataWrapper};
use data::LayoutDataWrapper;
use incremental::{self, RestyleDamage};
use opaque_node::OpaqueNodeMethods;
use smallvec::SmallVec16;
use wrapper::{LayoutElement, LayoutNode, TLayoutNode};
use wrapper::{LayoutElement, LayoutNode};
use script::dom::characterdata::CharacterDataTypeId;
use script::dom::node::NodeTypeId;
@ -677,7 +677,7 @@ impl<'ln> MatchMethods for LayoutNode<'ln> {
&mut None => panic!("no layout data"),
&mut Some(ref mut layout_data) => {
match self.type_id() {
Some(NodeTypeId::CharacterData(CharacterDataTypeId::Text)) => {
NodeTypeId::CharacterData(CharacterDataTypeId::Text) => {
// Text nodes get a copy of the parent style. This ensures
// that during fragment construction any non-inherited
// CSS properties (such as vertical-align) are correctly

38
components/layout/data.rs
View file

@ -2,19 +2,14 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#![allow(unsafe_code)]
use construct::{ConstructionItem, ConstructionResult};
use incremental::RestyleDamage;
use msg::constellation_msg::ConstellationChan;
use parallel::DomParallelInfo;
use script::dom::node::SharedLayoutData;
use script::layout_interface::LayoutChan;
use std::cell::{Ref, RefMut};
use std::mem;
use std::sync::Arc;
use style::properties::ComputedValues;
use wrapper::{LayoutNode, TLayoutNode};
/// Data that layout associates with a node.
pub struct PrivateLayoutData {
@ -95,41 +90,10 @@ impl LayoutDataWrapper {
}
}
#[allow(dead_code)]
#[allow(dead_code, unsafe_code)]
fn static_assertion(x: Option<LayoutDataWrapper>) {
unsafe {
let _: Option<::script::dom::node::LayoutData> =
::std::intrinsics::transmute(x);
}
}
/// A trait that allows access to the layout data of a DOM node.
pub trait LayoutDataAccess {
/// Borrows the layout data without checks.
unsafe fn borrow_layout_data_unchecked(&self) -> *const Option<LayoutDataWrapper>;
/// Borrows the layout data immutably. Fails on a conflicting borrow.
fn borrow_layout_data<'a>(&'a self) -> Ref<'a,Option<LayoutDataWrapper>>;
/// Borrows the layout data mutably. Fails on a conflicting borrow.
fn mutate_layout_data<'a>(&'a self) -> RefMut<'a,Option<LayoutDataWrapper>>;
}
impl<'ln> LayoutDataAccess for LayoutNode<'ln> {
#[inline(always)]
unsafe fn borrow_layout_data_unchecked(&self) -> *const Option<LayoutDataWrapper> {
mem::transmute(self.get().layout_data_unchecked())
}
#[inline(always)]
fn borrow_layout_data<'a>(&'a self) -> Ref<'a,Option<LayoutDataWrapper>> {
unsafe {
mem::transmute(self.get().layout_data())
}
}
#[inline(always)]
fn mutate_layout_data<'a>(&'a self) -> RefMut<'a,Option<LayoutDataWrapper>> {
unsafe {
mem::transmute(self.get().layout_data_mut())
}
}
}

2
components/layout/fragment.rs
View file

@ -19,7 +19,7 @@ use layout_debug;
use model::{self, IntrinsicISizes, IntrinsicISizesContribution, MaybeAuto, specified};
use text;
use opaque_node::OpaqueNodeMethods;
use wrapper::{TLayoutNode, ThreadSafeLayoutNode};
use wrapper::ThreadSafeLayoutNode;
use euclid::{Point2D, Rect, Size2D};
use gfx::display_list::{BLUR_INFLATION_FACTOR, OpaqueNode};

4
components/layout/layout_task.rs
View file

@ -11,7 +11,7 @@ use animation;
use construct::ConstructionResult;
use context::{SharedLayoutContext, SharedLayoutContextWrapper, heap_size_of_local_context};
use css::node_style::StyledNode;
use data::{LayoutDataAccess, LayoutDataWrapper};
use data::LayoutDataWrapper;
use display_list_builder::ToGfxColor;
use flow::{self, Flow, ImmutableFlowUtils, MutableFlowUtils, MutableOwnedFlowUtils};
use flow_ref::FlowRef;
@ -21,7 +21,7 @@ use layout_debug;
use opaque_node::OpaqueNodeMethods;
use parallel::{self, UnsafeFlow};
use sequential;
use wrapper::{LayoutNode, TLayoutNode};
use wrapper::LayoutNode;
use azure::azure::AzColor;
use canvas_traits::CanvasMsg;

2
components/layout/opaque_node.rs
View file

@ -10,7 +10,7 @@ use script::dom::bindings::js::LayoutJS;
use script::dom::node::Node;
use script::layout_interface::{TrustedNodeAddress};
use script_traits::UntrustedNodeAddress;
use wrapper::{LayoutNode, TLayoutNode, ThreadSafeLayoutNode};
use wrapper::{LayoutNode, ThreadSafeLayoutNode};
pub trait OpaqueNodeMethods {
/// Converts a DOM node (layout view) to an `OpaqueNode`.

2
components/layout/parallel.rs
View file

@ -12,7 +12,7 @@ use context::{LayoutContext, SharedLayoutContextWrapper, SharedLayoutContext};
use flow::{Flow, MutableFlowUtils, PreorderFlowTraversal, PostorderFlowTraversal};
use flow;
use flow_ref::FlowRef;
use data::{LayoutDataAccess, LayoutDataWrapper};
use data::LayoutDataWrapper;
use traversal::{BubbleISizes, AssignISizes, AssignBSizesAndStoreOverflow};
use traversal::{ComputeAbsolutePositions, BuildDisplayList};
use traversal::{RecalcStyleForNode, ConstructFlows};

384
components/layout/wrapper.rs
View file

@ -21,8 +21,6 @@
//!
//! Rules of the road for this file:
//!
//! * You must not use `.get()`; instead, use `.unsafe_get()`.
//!
//! * Do not call any methods on DOM nodes without checking to see whether they use borrow flags.
//!
//! o Instead of `get_attr()`, use `.get_attr_val_for_layout()`.
@ -36,7 +34,7 @@ use canvas_traits::CanvasMsg;
use context::SharedLayoutContext;
use css::node_style::StyledNode;
use incremental::RestyleDamage;
use data::{LayoutDataAccess, LayoutDataFlags, LayoutDataWrapper, PrivateLayoutData};
use data::{LayoutDataFlags, LayoutDataWrapper, PrivateLayoutData};
use opaque_node::OpaqueNodeMethods;
use gfx::display_list::OpaqueNode;
@ -50,11 +48,10 @@ use script::dom::characterdata::{CharacterDataTypeId, LayoutCharacterDataHelpers
use script::dom::element::{Element, ElementTypeId};
use script::dom::element::{LayoutElementHelpers, RawLayoutElementHelpers};
use script::dom::htmlelement::HTMLElementTypeId;
use script::dom::htmlcanvaselement::{HTMLCanvasElement, LayoutHTMLCanvasElementHelpers};
use script::dom::htmliframeelement::HTMLIFrameElement;
use script::dom::htmlcanvaselement::LayoutHTMLCanvasElementHelpers;
use script::dom::htmlimageelement::LayoutHTMLImageElementHelpers;
use script::dom::htmlinputelement::{HTMLInputElement, LayoutHTMLInputElementHelpers};
use script::dom::htmltextareaelement::{HTMLTextAreaElement, LayoutHTMLTextAreaElementHelpers};
use script::dom::htmltextareaelement::LayoutHTMLTextAreaElementHelpers;
use script::dom::node::{Node, NodeTypeId};
use script::dom::node::{LayoutNodeHelpers, RawLayoutNodeHelpers, SharedLayoutData};
use script::dom::node::{HAS_CHANGED, IS_DIRTY, HAS_DIRTY_SIBLINGS, HAS_DIRTY_DESCENDANTS};
@ -78,99 +75,6 @@ use style::node::{TElement, TElementAttributes, TNode};
use style::properties::{PropertyDeclaration, PropertyDeclarationBlock};
use url::Url;
/// Allows some convenience methods on generic layout nodes.
pub trait TLayoutNode {
/// Creates a new layout node with the same lifetime as this layout node.
unsafe fn new_with_this_lifetime(&self, node: &LayoutJS<Node>) -> Self;
/// Returns the type ID of this node. Fails if this node is borrowed mutably. Returns `None`
/// if this is a pseudo-element; otherwise, returns `Some`.
fn type_id(&self) -> Option<NodeTypeId>;
/// Returns the interior of this node as a `LayoutJS`. This is highly unsafe for layout to
/// call and as such is marked `unsafe`.
unsafe fn get_jsmanaged<'a>(&'a self) -> &'a LayoutJS<Node>;
/// Returns the interior of this node as a `Node`. This is highly unsafe for layout to call
/// and as such is marked `unsafe`.
unsafe fn get<'a>(&'a self) -> &'a Node {
&*self.get_jsmanaged().unsafe_get()
}
fn node_is_element(&self) -> bool {
match self.type_id() {
Some(NodeTypeId::Element(..)) => true,
_ => false
}
}
fn node_is_document(&self) -> bool {
match self.type_id() {
Some(NodeTypeId::Document(..)) => true,
_ => false
}
}
/// If this is an image element, returns its URL. If this is not an image element, fails.
///
/// FIXME(pcwalton): Don't copy URLs.
fn image_url(&self) -> Option<Url> {
unsafe {
match HTMLImageElementCast::to_layout_js(self.get_jsmanaged()) {
Some(elem) => elem.image_url().as_ref().map(|url| (*url).clone()),
None => panic!("not an image!")
}
}
}
fn renderer(&self) -> Option<Sender<CanvasMsg>> {
unsafe {
let canvas_element: Option<LayoutJS<HTMLCanvasElement>> =
HTMLCanvasElementCast::to_layout_js(self.get_jsmanaged());
canvas_element.and_then(|elem| elem.get_renderer())
}
}
fn canvas_width(&self) -> u32 {
unsafe {
let canvas_element: Option<LayoutJS<HTMLCanvasElement>> =
HTMLCanvasElementCast::to_layout_js(self.get_jsmanaged());
canvas_element.unwrap().get_canvas_width()
}
}
fn canvas_height(&self) -> u32 {
unsafe {
let canvas_element: Option<LayoutJS<HTMLCanvasElement>> =
HTMLCanvasElementCast::to_layout_js(self.get_jsmanaged());
canvas_element.unwrap().get_canvas_height()
}
}
/// If this node is an iframe element, returns its pipeline and subpage IDs. If this node is
/// not an iframe element, fails.
fn iframe_pipeline_and_subpage_ids(&self) -> (PipelineId, SubpageId) {
unsafe {
let iframe_element: LayoutJS<HTMLIFrameElement> =
match HTMLIFrameElementCast::to_layout_js(self.get_jsmanaged()) {
Some(elem) => elem,
None => panic!("not an iframe element!")
};
((*iframe_element.unsafe_get()).containing_page_pipeline_id().unwrap(),
(*iframe_element.unsafe_get()).subpage_id().unwrap())
}
}
/// If this is a text node or generated content, copies out its content. If this is not a text
/// node, fails.
///
/// FIXME(pcwalton): This might have too much copying and/or allocation. Profile this.
fn text_content(&self) -> Vec<ContentItem>;
/// Returns the first child of this node.
fn first_child(&self) -> Option<Self>;
}
/// A wrapper so that layout can access only the methods that it should have access to. Layout must
/// only ever see these and must never see instances of `LayoutJS`.
#[derive(Copy, Clone)]
@ -189,56 +93,22 @@ impl<'a> PartialEq for LayoutNode<'a> {
}
}
impl<'ln> TLayoutNode for LayoutNode<'ln> {
unsafe fn new_with_this_lifetime(&self, node: &LayoutJS<Node>) -> LayoutNode<'ln> {
impl<'ln> LayoutNode<'ln> {
/// Creates a new layout node with the same lifetime as this layout node.
pub unsafe fn new_with_this_lifetime(&self, node: &LayoutJS<Node>) -> LayoutNode<'ln> {
LayoutNode {
node: *node,
chain: self.chain,
}
}
fn type_id(&self) -> Option<NodeTypeId> {
/// Returns the type ID of this node.
pub fn type_id(&self) -> NodeTypeId {
unsafe {
Some(self.node.type_id_for_layout())
self.node.type_id_for_layout()
}
}
unsafe fn get_jsmanaged<'a>(&'a self) -> &'a LayoutJS<Node> {
&self.node
}
fn first_child(&self) -> Option<LayoutNode<'ln>> {
unsafe {
self.get_jsmanaged().first_child_ref().map(|node| self.new_with_this_lifetime(&node))
}
}
fn text_content(&self) -> Vec<ContentItem> {
unsafe {
let text: Option<LayoutJS<Text>> = TextCast::to_layout_js(self.get_jsmanaged());
if let Some(text) = text {
return vec![
ContentItem::String(
CharacterDataCast::from_layout_js(&text).data_for_layout().to_owned())
];
}
let input: Option<LayoutJS<HTMLInputElement>> =
HTMLInputElementCast::to_layout_js(self.get_jsmanaged());
if let Some(input) = input {
return vec![ContentItem::String(input.get_value_for_layout())];
}
let area: Option<LayoutJS<HTMLTextAreaElement>> =
HTMLTextAreaElementCast::to_layout_js(self.get_jsmanaged());
if let Some(area) = area {
return vec![ContentItem::String(area.get_value_for_layout())];
}
panic!("not text!")
}
}
}
impl<'ln> LayoutNode<'ln> {
pub fn dump(self) {
self.dump_indent(0);
}
@ -282,14 +152,8 @@ impl<'ln> LayoutNode<'ln> {
/// Returns an iterator over this node's children.
pub fn children(self) -> LayoutNodeChildrenIterator<'ln> {
// FIXME(zwarich): Remove this when UFCS lands and there is a better way
// of disambiguating methods.
fn first_child<T: TLayoutNode>(this: T) -> Option<T> {
this.first_child()
}
LayoutNodeChildrenIterator {
current: first_child(self),
current: self.first_child(),
}
}
@ -300,6 +164,8 @@ impl<'ln> LayoutNode<'ln> {
}
/// Returns the interior of this node as a `LayoutJS`. This is highly unsafe for layout to
/// call and as such is marked `unsafe`.
pub unsafe fn get_jsmanaged<'a>(&'a self) -> &'a LayoutJS<Node> {
&self.node
}
@ -322,7 +188,7 @@ impl<'ln> LayoutNode<'ln> {
}
pub fn has_children(self) -> bool {
TLayoutNode::first_child(&self).is_some()
self.first_child().is_some()
}
/// While doing a reflow, the node at the root has no parent, as far as we're
@ -396,11 +262,17 @@ impl<'ln> TNode for LayoutNode<'ln> {
}
fn is_element(&self) -> bool {
self.node_is_element()
match self.type_id() {
NodeTypeId::Element(..) => true,
_ => false
}
}
fn is_document(&self) -> bool {
self.node_is_document()
match self.type_id() {
NodeTypeId::Document(..) => true,
_ => false
}
}
fn match_attr<F>(&self, attr: &AttrSelector, test: F) -> bool where F: Fn(&str) -> bool {
@ -460,6 +332,28 @@ impl<'ln> LayoutNode<'ln> {
pub unsafe fn set_dirty_descendants(&self, value: bool) {
self.node.set_flag(HAS_DIRTY_DESCENDANTS, value)
}
/// Borrows the layout data without checks.
#[inline(always)]
pub unsafe fn borrow_layout_data_unchecked(&self) -> *const Option<LayoutDataWrapper> {
mem::transmute(self.get_jsmanaged().layout_data_unchecked())
}
/// Borrows the layout data immutably. Fails on a conflicting borrow.
#[inline(always)]
pub fn borrow_layout_data<'a>(&'a self) -> Ref<'a,Option<LayoutDataWrapper>> {
unsafe {
mem::transmute(self.get_jsmanaged().layout_data())
}
}
/// Borrows the layout data mutably. Fails on a conflicting borrow.
#[inline(always)]
pub fn mutate_layout_data<'a>(&'a self) -> RefMut<'a,Option<LayoutDataWrapper>> {
unsafe {
mem::transmute(self.get_jsmanaged().layout_data_mut())
}
}
}
pub struct LayoutNodeChildrenIterator<'a> {
@ -718,76 +612,15 @@ pub struct ThreadSafeLayoutNode<'ln> {
pseudo: PseudoElementType,
}
impl<'ln> TLayoutNode for ThreadSafeLayoutNode<'ln> {
impl<'ln> ThreadSafeLayoutNode<'ln> {
/// Creates a new layout node with the same lifetime as this layout node.
unsafe fn new_with_this_lifetime(&self, node: &LayoutJS<Node>) -> ThreadSafeLayoutNode<'ln> {
pub unsafe fn new_with_this_lifetime(&self, node: &LayoutJS<Node>) -> ThreadSafeLayoutNode<'ln> {
ThreadSafeLayoutNode {
node: self.node.new_with_this_lifetime(node),
pseudo: PseudoElementType::Normal,
}
}
/// Returns `None` if this is a pseudo-element.
fn type_id(&self) -> Option<NodeTypeId> {
if self.pseudo != PseudoElementType::Normal {
return None
}
self.node.type_id()
}
unsafe fn get_jsmanaged<'a>(&'a self) -> &'a LayoutJS<Node> {
self.node.get_jsmanaged()
}
unsafe fn get<'a>(&'a self) -> &'a Node { // this change.
&*self.get_jsmanaged().unsafe_get()
}
fn first_child(&self) -> Option<ThreadSafeLayoutNode<'ln>> {
if self.pseudo != PseudoElementType::Normal {
return None
}
if self.has_before_pseudo() {
// FIXME(pcwalton): This logic looks weird. Is it right?
match self.pseudo {
PseudoElementType::Normal => {
let pseudo_before_node = self.with_pseudo(PseudoElementType::Before(self.get_before_display()));
return Some(pseudo_before_node)
}
PseudoElementType::Before(display::T::inline) => {}
PseudoElementType::Before(_) => {
let pseudo_before_node = self.with_pseudo(PseudoElementType::Before(display::T::inline));
return Some(pseudo_before_node)
}
_ => {}
}
}
unsafe {
self.get_jsmanaged().first_child_ref().map(|node| self.new_with_this_lifetime(&node))
}
}
fn text_content(&self) -> Vec<ContentItem> {
if self.pseudo != PseudoElementType::Normal {
let layout_data_ref = self.borrow_layout_data();
let node_layout_data_wrapper = layout_data_ref.as_ref().unwrap();
if self.pseudo.is_before() {
let before_style = node_layout_data_wrapper.data.before_style.as_ref().unwrap();
return get_content(&before_style.get_box().content)
} else {
let after_style = node_layout_data_wrapper.data.after_style.as_ref().unwrap();
return get_content(&after_style.get_box().content)
}
}
self.node.text_content()
}
}
impl<'ln> ThreadSafeLayoutNode<'ln> {
/// Creates a new `ThreadSafeLayoutNode` from the given `LayoutNode`.
pub fn new<'a>(node: &LayoutNode<'a>) -> ThreadSafeLayoutNode<'a> {
ThreadSafeLayoutNode {
@ -805,6 +638,22 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
}
}
/// Returns the interior of this node as a `LayoutJS`. This is highly unsafe for layout to
/// call and as such is marked `unsafe`.
pub unsafe fn get_jsmanaged<'a>(&'a self) -> &'a LayoutJS<Node> {
self.node.get_jsmanaged()
}
/// Returns the type ID of this node.
/// Returns `None` if this is a pseudo-element; otherwise, returns `Some`.
pub fn type_id(&self) -> Option<NodeTypeId> {
if self.pseudo != PseudoElementType::Normal {
return None
}
Some(self.node.type_id())
}
pub fn debug_id(self) -> usize {
self.node.debug_id()
}
@ -813,6 +662,20 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
self.node.flow_debug_id()
}
fn first_child(&self) -> Option<ThreadSafeLayoutNode<'ln>> {
if self.pseudo != PseudoElementType::Normal {
return None
}
if self.has_before_pseudo() {
return Some(self.with_pseudo(PseudoElementType::Before(self.get_before_display())));
}
unsafe {
self.get_jsmanaged().first_child_ref().map(|node| self.new_with_this_lifetime(&node))
}
}
/// Returns the next sibling of this node. Unsafe and private because this can lead to races.
unsafe fn next_sibling(&self) -> Option<ThreadSafeLayoutNode<'ln>> {
if self.pseudo.is_before() {
@ -889,11 +752,11 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
layout_data_wrapper_ref.data.after_style.is_some()
}
/// Borrows the layout data without checking. Fails on a conflicting borrow.
/// Borrows the layout data without checking.
#[inline(always)]
fn borrow_layout_data_unchecked<'a>(&'a self) -> *const Option<LayoutDataWrapper> {
unsafe {
mem::transmute(self.get().layout_data_unchecked())
self.node.borrow_layout_data_unchecked()
}
}
@ -902,9 +765,7 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
/// TODO(pcwalton): Make this private. It will let us avoid borrow flag checks in some cases.
#[inline(always)]
pub fn borrow_layout_data<'a>(&'a self) -> Ref<'a,Option<LayoutDataWrapper>> {
unsafe {
mem::transmute(self.get().layout_data())
}
self.node.borrow_layout_data()
}
/// Borrows the layout data mutably. Fails on a conflicting borrow.
@ -912,9 +773,7 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
/// TODO(pcwalton): Make this private. It will let us avoid borrow flag checks in some cases.
#[inline(always)]
pub fn mutate_layout_data<'a>(&'a self) -> RefMut<'a,Option<LayoutDataWrapper>> {
unsafe {
mem::transmute(self.get().layout_data_mut())
}
self.node.mutate_layout_data()
}
/// Traverses the tree in postorder.
@ -1052,6 +911,89 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
_ => false
}
}
/// If this is a text node, generated content, or a form element, copies out
/// its content. Otherwise, panics.
///
/// FIXME(pcwalton): This might have too much copying and/or allocation. Profile this.
pub fn text_content(&self) -> Vec<ContentItem> {
if self.pseudo != PseudoElementType::Normal {
let layout_data_ref = self.borrow_layout_data();
let node_layout_data_wrapper = layout_data_ref.as_ref().unwrap();
if self.pseudo.is_before() {
let before_style = node_layout_data_wrapper.data.before_style.as_ref().unwrap();
return get_content(&before_style.get_box().content)
} else {
let after_style = node_layout_data_wrapper.data.after_style.as_ref().unwrap();
return get_content(&after_style.get_box().content)
}
}
let this = unsafe { self.get_jsmanaged() };
let text = TextCast::to_layout_js(this);
if let Some(text) = text {
let data = unsafe {
CharacterDataCast::from_layout_js(&text).data_for_layout().to_owned()
};
return vec![ContentItem::String(data)];
}
let input = HTMLInputElementCast::to_layout_js(this);
if let Some(input) = input {
let data = unsafe { input.get_value_for_layout() };
return vec![ContentItem::String(data)];
}
let area = HTMLTextAreaElementCast::to_layout_js(this);
if let Some(area) = area {
let data = unsafe { area.get_value_for_layout() };
return vec![ContentItem::String(data)];
}
panic!("not text!")
}
/// If this is an image element, returns its URL. If this is not an image element, fails.
///
/// FIXME(pcwalton): Don't copy URLs.
pub fn image_url(&self) -> Option<Url> {
unsafe {
HTMLImageElementCast::to_layout_js(self.get_jsmanaged())
.expect("not an image!")
.image_url()
}
}
pub fn renderer(&self) -> Option<Sender<CanvasMsg>> {
unsafe {
let canvas_element = HTMLCanvasElementCast::to_layout_js(self.get_jsmanaged());
canvas_element.and_then(|elem| elem.get_renderer())
}
}
pub fn canvas_width(&self) -> u32 {
unsafe {
let canvas_element = HTMLCanvasElementCast::to_layout_js(self.get_jsmanaged());
canvas_element.unwrap().get_canvas_width()
}
}
pub fn canvas_height(&self) -> u32 {
unsafe {
let canvas_element = HTMLCanvasElementCast::to_layout_js(self.get_jsmanaged());
canvas_element.unwrap().get_canvas_height()
}
}
/// If this node is an iframe element, returns its pipeline and subpage IDs. If this node is
/// not an iframe element, fails.
pub fn iframe_pipeline_and_subpage_ids(&self) -> (PipelineId, SubpageId) {
unsafe {
let iframe_element = HTMLIFrameElementCast::to_layout_js(self.get_jsmanaged())
.expect("not an iframe element!");
((*iframe_element.unsafe_get()).containing_page_pipeline_id().unwrap(),
(*iframe_element.unsafe_get()).subpage_id().unwrap())
}
}
}
pub struct ThreadSafeLayoutNodeChildrenIterator<'a> {
@ -1137,7 +1079,7 @@ pub trait PostorderNodeMutTraversal {
}
/// Opaque type stored in type-unsafe work queues for parallel layout.
/// Must be transmutable to and from LayoutNode/ThreadSafeLayoutNode.
/// Must be transmutable to and from LayoutNode.
pub type UnsafeLayoutNode = (usize, usize);
pub fn layout_node_to_unsafe_layout_node(node: &LayoutNode) -> UnsafeLayoutNode {