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Separate style+layout and layout-specific wrapper functionality.

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This patch does a number of things, unfortunately all at once:
* Hoists a large subset of the layout wrapper functionality into the style system.
* Merges TElementAttributes into the newly-created TElement.
* Reorganizes LayoutData by style vs layout, and removes LayoutDataShared.
* Simplifies the API for borrowing style/layout data.

There's still more to do to make the style system usable standalone, but
this is a good start.
This commit is contained in:
Bobby Holley 2015-12-17 16:21:29 -08:00
parent 89ab368258
commit 47059d2d26
20 changed files with 657 additions and 706 deletions
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33
components/layout/layout_task.rs
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@ -13,7 +13,6 @@ use azure::azure::AzColor;
use canvas_traits::CanvasMsg;
use construct::ConstructionResult;
use context::{SharedLayoutContext, StylistWrapper, heap_size_of_local_context};
use data::LayoutDataWrapper;
use display_list_builder::ToGfxColor;
use euclid::Matrix4;
use euclid::point::Point2D;
@ -45,7 +44,7 @@ use profile_traits::time::{TimerMetadataFrameType, TimerMetadataReflowType};
use profile_traits::time::{self, TimerMetadata, profile};
use query::{LayoutRPCImpl, process_content_box_request, process_content_boxes_request};
use query::{process_node_geometry_request, process_offset_parent_query, process_resolved_style_request};
use script::dom::node::LayoutData;
use script::dom::node::OpaqueStyleAndLayoutData;
use script::layout_interface::Animation;
use script::layout_interface::{LayoutRPC, OffsetParentResponse};
use script::layout_interface::{Msg, NewLayoutTaskInfo, Reflow, ReflowGoal, ReflowQueryType};
@ -65,6 +64,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::mpsc::{channel, Sender, Receiver};
use std::sync::{Arc, Mutex, MutexGuard, RwLock};
use style::computed_values::{filter, mix_blend_mode};
use style::dom::{TDocument, TElement, TNode};
use style::media_queries::{Device, MediaType};
use style::selector_matching::{Stylist, USER_OR_USER_AGENT_STYLESHEETS};
use style::stylesheets::{CSSRuleIteratorExt, Stylesheet};
@ -77,8 +77,7 @@ use util::opts;
use util::task;
use util::task_state;
use util::workqueue::WorkQueue;
use wrapper::{LayoutDocument, LayoutElement, LayoutNode};
use wrapper::{ServoLayoutNode, ThreadSafeLayoutNode};
use wrapper::{LayoutNode, NonOpaqueStyleAndLayoutData, ServoLayoutNode, ThreadSafeLayoutNode};
/// The number of screens of data we're allowed to generate display lists for in each direction.
pub const DISPLAY_PORT_SIZE_FACTOR: i32 = 8;
@ -607,9 +606,9 @@ impl LayoutTask {
Msg::SetVisibleRects(new_visible_rects) => {
self.set_visible_rects(new_visible_rects, possibly_locked_rw_data);
}
Msg::ReapLayoutData(dead_layout_data) => {
Msg::ReapStyleAndLayoutData(dead_data) => {
unsafe {
self.handle_reap_layout_data(dead_layout_data)
self.handle_reap_style_and_layout_data(dead_data)
}
}
Msg::CollectReports(reports_chan) => {
@ -707,9 +706,9 @@ impl LayoutTask {
response_chan.send(()).unwrap();
loop {
match self.port.recv().unwrap() {
Msg::ReapLayoutData(dead_layout_data) => {
Msg::ReapStyleAndLayoutData(dead_data) => {
unsafe {
self.handle_reap_layout_data(dead_layout_data)
self.handle_reap_style_and_layout_data(dead_data)
}
}
Msg::ExitNow => {
@ -765,14 +764,11 @@ impl LayoutTask {
}
fn try_get_layout_root<'ln, N: LayoutNode<'ln>>(&self, node: N) -> Option<FlowRef> {
let mut layout_data_ref = node.mutate_layout_data();
let layout_data =
match layout_data_ref.as_mut() {
None => return None,
Some(layout_data) => layout_data,
};
let result = layout_data.data.flow_construction_result.swap_out();
let mut data = match node.mutate_layout_data() {
Some(x) => x,
None => return None,
};
let result = data.flow_construction_result.swap_out();
let mut flow = match result {
ConstructionResult::Flow(mut flow, abs_descendants) => {
@ -1312,8 +1308,9 @@ impl LayoutTask {
/// Handles a message to destroy layout data. Layout data must be destroyed on *this* task
/// because the struct type is transmuted to a different type on the script side.
unsafe fn handle_reap_layout_data(&self, layout_data: LayoutData) {
let _: LayoutDataWrapper = transmute(layout_data);
unsafe fn handle_reap_style_and_layout_data(&self, data: OpaqueStyleAndLayoutData) {
let non_opaque: NonOpaqueStyleAndLayoutData = transmute(data.ptr);
let _ = Box::from_raw(non_opaque);
}
/// Returns profiling information which is passed to the time profiler.