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Auto merge of #22395 - jdm:initial-iframe-size, r=Manishearth

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Initialize iframe viewport immediately

This is probably a significant cause of unstable test results, and it finally bothered me enough to fix it. The solution isn't great for performance (a sync layout query every time a iframe is added to a document), but performance needs to follow correctness.

---
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #14364 and fix #15689 and fix #15688.
- [x] There are tests for these changes

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bors-servo 2018-12-18 08:51:26 -05:00 • committed by GitHub
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19 changed files with 210 additions and 154 deletions
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6
components/script/dom/bindings/callback.rs
View file

@ -4,12 +4,15 @@
//! Base classes to work with IDL callbacks.
use crate::dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
use crate::dom::bindings::error::{report_pending_exception, Error, Fallible};
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::reflector::DomObject;
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::bindings::settings_stack::{AutoEntryScript, AutoIncumbentScript};
use crate::dom::bindings::utils::AsCCharPtrPtr;
use crate::dom::globalscope::GlobalScope;
use crate::dom::window::Window;
use js::jsapi::Heap;
use js::jsapi::JSAutoCompartment;
use js::jsapi::{AddRawValueRoot, IsCallable, JSContext, JSObject};
@ -242,6 +245,9 @@ impl CallSetup {
#[allow(unrooted_must_root)]
pub fn new<T: CallbackContainer>(callback: &T, handling: ExceptionHandling) -> CallSetup {
let global = unsafe { GlobalScope::from_object(callback.callback()) };
if let Some(window) = global.downcast::<Window>() {
window.Document().ensure_safe_to_run_script_or_layout();
}
let cx = global.get_cx();
let aes = AutoEntryScript::new(&global);

3
components/script/dom/bindings/trace.rs
View file

@ -49,6 +49,7 @@ use crate::dom::bindings::utils::WindowProxyHandler;
use crate::dom::document::PendingRestyle;
use crate::dom::htmlimageelement::SourceSet;
use crate::dom::htmlmediaelement::MediaFrameRenderer;
use crate::task::TaskBox;
use crossbeam_channel::{Receiver, Sender};
use cssparser::RGBA;
use devtools_traits::{CSSError, TimelineMarkerType, WorkerId};
@ -139,6 +140,8 @@ pub unsafe trait JSTraceable {
unsafe fn trace(&self, trc: *mut JSTracer);
}
unsafe_no_jsmanaged_fields!(Box<dyn TaskBox>);
unsafe_no_jsmanaged_fields!(CSSError);
unsafe_no_jsmanaged_fields!(&'static Encoding);

67
components/script/dom/document.rs
View file

@ -101,6 +101,7 @@ use crate::dom::windowproxy::WindowProxy;
use crate::fetch::FetchCanceller;
use crate::script_runtime::{CommonScriptMsg, ScriptThreadEventCategory};
use crate::script_thread::{MainThreadScriptMsg, ScriptThread};
use crate::task::TaskBox;
use crate::task_source::{TaskSource, TaskSourceName};
use crate::timers::OneshotTimerCallback;
use devtools_traits::ScriptToDevtoolsControlMsg;
@ -410,6 +411,11 @@ pub struct Document {
responsive_images: DomRefCell<Vec<Dom<HTMLImageElement>>>,
/// Number of redirects for the document load
redirect_count: Cell<u16>,
/// Number of outstanding requests to prevent JS or layout from running.
script_and_layout_blockers: Cell<u32>,
/// List of tasks to execute as soon as last script/layout blocker is removed.
#[ignore_malloc_size_of = "Measuring trait objects is hard"]
delayed_tasks: DomRefCell<Vec<Box<dyn TaskBox>>>,
}
#[derive(JSTraceable, MallocSizeOf)]
@ -2695,9 +2701,51 @@ impl Document {
fired_unload: Cell::new(false),
responsive_images: Default::default(),
redirect_count: Cell::new(0),
script_and_layout_blockers: Cell::new(0),
delayed_tasks: Default::default(),
}
}
/// Prevent any JS or layout from running until the corresponding call to
/// `remove_script_and_layout_blocker`. Used to isolate periods in which
/// the DOM is in an unstable state and should not be exposed to arbitrary
/// web content. Any attempts to invoke content JS or query layout during
/// that time will trigger a panic. `add_delayed_task` will cause the
/// provided task to be executed as soon as the last blocker is removed.
pub fn add_script_and_layout_blocker(&self) {
self.script_and_layout_blockers
.set(self.script_and_layout_blockers.get() + 1);
}
/// Terminate the period in which JS or layout is disallowed from running.
/// If no further blockers remain, any delayed tasks in the queue will
/// be executed in queue order until the queue is empty.
pub fn remove_script_and_layout_blocker(&self) {
assert!(self.script_and_layout_blockers.get() > 0);
self.script_and_layout_blockers
.set(self.script_and_layout_blockers.get() - 1);
while self.script_and_layout_blockers.get() == 0 && !self.delayed_tasks.borrow().is_empty()
{
let task = self.delayed_tasks.borrow_mut().remove(0);
task.run_box();
}
}
/// Enqueue a task to run as soon as any JS and layout blockers are removed.
pub fn add_delayed_task<T: 'static + TaskBox>(&self, task: T) {
self.delayed_tasks.borrow_mut().push(Box::new(task));
}
/// Assert that the DOM is in a state that will allow running content JS or
/// performing a layout operation.
pub fn ensure_safe_to_run_script_or_layout(&self) {
assert_eq!(
self.script_and_layout_blockers.get(),
0,
"Attempt to use script or layout while DOM not in a stable state"
);
}
// https://dom.spec.whatwg.org/#dom-document-document
pub fn Constructor(window: &Window) -> Fallible<DomRoot<Document>> {
let doc = window.Document();
@ -2806,17 +2854,11 @@ impl Document {
///
/// FIXME(emilio): This really needs to be somehow more in sync with layout.
/// Feels like a hack.
///
/// Also, shouldn't return an option, I'm quite sure.
pub fn device(&self) -> Option<Device> {
let window_size = self.window().window_size()?;
pub fn device(&self) -> Device {
let window_size = self.window().window_size();
let viewport_size = window_size.initial_viewport;
let device_pixel_ratio = window_size.device_pixel_ratio;
Some(Device::new(
MediaType::screen(),
viewport_size,
device_pixel_ratio,
))
Device::new(MediaType::screen(), viewport_size, device_pixel_ratio)
}
/// Remove a stylesheet owned by `owner` from the list of document sheets.
@ -4183,7 +4225,7 @@ impl DocumentMethods for Document {
let y = *y as f32;
let point = &Point2D::new(x, y);
let window = window_from_node(self);
let viewport = window.window_size()?.initial_viewport;
let viewport = window.window_size().initial_viewport;
if self.browsing_context().is_none() {
return None;
@ -4218,10 +4260,7 @@ impl DocumentMethods for Document {
let y = *y as f32;
let point = &Point2D::new(x, y);
let window = window_from_node(self);
let viewport = match window.window_size() {
Some(size) => size.initial_viewport,
None => return vec![],
};
let viewport = window.window_size().initial_viewport;
if self.browsing_context().is_none() {
return vec![];

41
components/script/dom/htmliframeelement.rs
View file

@ -26,6 +26,7 @@ use crate::dom::windowproxy::WindowProxy;
use crate::script_thread::ScriptThread;
use crate::task_source::TaskSource;
use dom_struct::dom_struct;
use euclid::TypedSize2D;
use html5ever::{LocalName, Prefix};
use ipc_channel::ipc;
use msg::constellation_msg::{BrowsingContextId, PipelineId, TopLevelBrowsingContextId};
@ -34,6 +35,7 @@ use script_layout_interface::message::ReflowGoal;
use script_traits::IFrameSandboxState::{IFrameSandboxed, IFrameUnsandboxed};
use script_traits::{
IFrameLoadInfo, IFrameLoadInfoWithData, JsEvalResult, LoadData, UpdatePipelineIdReason,
WindowSizeData,
};
use script_traits::{NewLayoutInfo, ScriptMsg};
use servo_config::prefs::PREFS;
@ -192,7 +194,16 @@ impl HTMLIFrameElement {
load_data: load_data.unwrap(),
pipeline_port: pipeline_receiver,
content_process_shutdown_chan: None,
window_size: None,
window_size: WindowSizeData {
initial_viewport: {
let rect = self.upcast::<Node>().bounding_content_box_or_zero();
TypedSize2D::new(
rect.size.width.to_f32_px(),
rect.size.height.to_f32_px(),
)
},
device_pixel_ratio: window.device_pixel_ratio(),
},
layout_threads: PREFS.get("layout.threads").as_u64().expect("count") as usize,
};
@ -612,18 +623,22 @@ impl VirtualMethods for HTMLIFrameElement {
s.bind_to_tree(tree_in_doc);
}
// https://html.spec.whatwg.org/multipage/#the-iframe-element
// "When an iframe element is inserted into a document that has
// a browsing context, the user agent must create a new
// browsing context, set the element's nested browsing context
// to the newly-created browsing context, and then process the
// iframe attributes for the "first time"."
if self.upcast::<Node>().is_in_doc_with_browsing_context() {
debug!("iframe bound to browsing context.");
debug_assert!(tree_in_doc, "is_in_doc_with_bc, but not tree_in_doc");
self.create_nested_browsing_context();
self.process_the_iframe_attributes(ProcessingMode::FirstTime);
}
let iframe = Trusted::new(self);
document_from_node(self).add_delayed_task(task!(IFrameDelayedInitialize: move || {
let this = iframe.root();
// https://html.spec.whatwg.org/multipage/#the-iframe-element
// "When an iframe element is inserted into a document that has
// a browsing context, the user agent must create a new
// browsing context, set the element's nested browsing context
// to the newly-created browsing context, and then process the
// iframe attributes for the "first time"."
if this.upcast::<Node>().is_in_doc_with_browsing_context() {
debug!("iframe bound to browsing context.");
debug_assert!(tree_in_doc, "is_in_doc_with_bc, but not tree_in_doc");
this.create_nested_browsing_context();
this.process_the_iframe_attributes(ProcessingMode::FirstTime);
}
}));
}
fn unbind_from_tree(&self, context: &UnbindContext) {

23
components/script/dom/htmlimageelement.rs
View file

@ -634,21 +634,14 @@ impl HTMLImageElement {
) -> Au {
let document = document_from_node(self);
let device = document.device();
if !device.is_some() {
return Au(1);
}
let quirks_mode = document.quirks_mode();
//FIXME https://github.com/whatwg/html/issues/3832
source_size_list.evaluate(&device.unwrap(), quirks_mode)
source_size_list.evaluate(&device, quirks_mode)
}
/// https://html.spec.whatwg.org/multipage/#matches-the-environment
fn matches_environment(&self, media_query: String) -> bool {
let document = document_from_node(self);
let device = match document.device() {
Some(device) => device,
None => return false,
};
let quirks_mode = document.quirks_mode();
let document_url = &document.url();
// FIXME(emilio): This should do the same that we do for other media
@ -668,7 +661,7 @@ impl HTMLImageElement {
let mut parserInput = ParserInput::new(&media_query);
let mut parser = Parser::new(&mut parserInput);
let media_list = MediaList::parse(&context, &mut parser);
media_list.evaluate(&device, quirks_mode)
media_list.evaluate(&document.device(), quirks_mode)
}
/// <https://html.spec.whatwg.org/multipage/#normalise-the-source-densities>
@ -740,13 +733,11 @@ impl HTMLImageElement {
// Step 5
let mut best_candidate = max;
let device = document_from_node(self).device();
if let Some(device) = device {
let device_den = device.device_pixel_ratio().get() as f64;
for (index, image_source) in img_sources.iter().enumerate() {
let current_den = image_source.descriptor.den.unwrap();
if current_den < best_candidate.0 && current_den >= device_den {
best_candidate = (current_den, index);
}
let device_den = device.device_pixel_ratio().get() as f64;
for (index, image_source) in img_sources.iter().enumerate() {
let current_den = image_source.descriptor.den.unwrap();
if current_den < best_candidate.0 && current_den >= device_den {
best_candidate = (current_den, index);
}
}
let selected_source = img_sources.remove(best_candidate.1).clone();

5
components/script/dom/htmlscriptelement.rs
View file

@ -777,7 +777,10 @@ impl VirtualMethods for HTMLScriptElement {
}
if tree_in_doc && !self.parser_inserted.get() {
self.prepare();
let script = Trusted::new(self);
document_from_node(self).add_delayed_task(task!(ScriptDelayedInitialize: move || {
script.root().prepare();
}));
}
}

6
components/script/dom/mediaquerylist.rs
View file

@ -69,10 +69,8 @@ impl MediaQueryList {
}
pub fn evaluate(&self) -> bool {
self.document.device().map_or(false, |device| {
self.media_query_list
.evaluate(&device, self.document.quirks_mode())
})
self.media_query_list
.evaluate(&self.document.device(), self.document.quirks_mode())
}
}

12
components/script/dom/node.rs
View file

@ -1504,8 +1504,11 @@ impl Node {
// https://dom.spec.whatwg.org/#concept-node-adopt
pub fn adopt(node: &Node, document: &Document) {
document.add_script_and_layout_blocker();
// Step 1.
let old_doc = node.owner_doc();
old_doc.add_script_and_layout_blocker();
// Step 2.
node.remove_self();
// Step 3.
@ -1530,6 +1533,9 @@ impl Node {
vtable_for(&descendant).adopting_steps(&old_doc);
}
}
old_doc.remove_script_and_layout_blocker();
document.remove_script_and_layout_blocker();
}
// https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity
@ -1685,6 +1691,7 @@ impl Node {
child: Option<&Node>,
suppress_observers: SuppressObserver,
) {
node.owner_doc().add_script_and_layout_blocker();
debug_assert!(&*node.owner_doc() == &*parent.owner_doc());
debug_assert!(child.map_or(true, |child| Some(parent) == child.GetParentNode().r()));
@ -1774,10 +1781,12 @@ impl Node {
};
MutationObserver::queue_a_mutation_record(&parent, mutation);
}
node.owner_doc().remove_script_and_layout_blocker();
}
// https://dom.spec.whatwg.org/#concept-node-replace-all
pub fn replace_all(node: Option<&Node>, parent: &Node) {
parent.owner_doc().add_script_and_layout_blocker();
// Step 1.
if let Some(node) = node {
Node::adopt(node, &*parent.owner_doc());
@ -1819,6 +1828,7 @@ impl Node {
};
MutationObserver::queue_a_mutation_record(&parent, mutation);
}
parent.owner_doc().remove_script_and_layout_blocker();
}
// https://dom.spec.whatwg.org/#concept-node-pre-remove
@ -1839,6 +1849,7 @@ impl Node {
// https://dom.spec.whatwg.org/#concept-node-remove
fn remove(node: &Node, parent: &Node, suppress_observers: SuppressObserver) {
parent.owner_doc().add_script_and_layout_blocker();
assert!(
node.GetParentNode()
.map_or(false, |node_parent| &*node_parent == parent)
@ -1884,6 +1895,7 @@ impl Node {
};
MutationObserver::queue_a_mutation_record(&parent, mutation);
}
parent.owner_doc().remove_script_and_layout_blocker();
}
// https://dom.spec.whatwg.org/#concept-node-clone

39
components/script/dom/window.rs
View file

@ -216,7 +216,7 @@ pub struct Window {
layout_rpc: Box<LayoutRPC + Send + 'static>,
/// The current size of the window, in pixels.
window_size: Cell<Option<WindowSizeData>>,
window_size: Cell<WindowSizeData>,
/// A handle for communicating messages to the bluetooth thread.
#[ignore_malloc_size_of = "channels are hard"]
@ -958,7 +958,9 @@ impl WindowMethods for Window {
fn InnerHeight(&self) -> i32 {
self.window_size
.get()
.and_then(|e| e.initial_viewport.height.to_i32())
.initial_viewport
.height
.to_i32()
.unwrap_or(0)
}
@ -967,7 +969,9 @@ impl WindowMethods for Window {
fn InnerWidth(&self) -> i32 {
self.window_size
.get()
.and_then(|e| e.initial_viewport.width.to_i32())
.initial_viewport
.width
.to_i32()
.unwrap_or(0)
}
@ -1245,10 +1249,7 @@ impl Window {
let xfinite = if x_.is_finite() { x_ } else { 0.0f64 };
let yfinite = if y_.is_finite() { y_ } else { 0.0f64 };
// Step 4
if self.window_size.get().is_none() {
return;
}
// TODO Step 4 - determine if a window has a viewport
// Step 5
//TODO remove scrollbar width
@ -1322,9 +1323,7 @@ impl Window {
}
pub fn device_pixel_ratio(&self) -> TypedScale<f32, CSSPixel, DevicePixel> {
self.window_size
.get()
.map_or(TypedScale::new(1.0), |data| data.device_pixel_ratio)
self.window_size.get().device_pixel_ratio
}
fn client_window(&self) -> (TypedSize2D<u32, CSSPixel>, TypedPoint2D<i32, CSSPixel>) {
@ -1362,6 +1361,7 @@ impl Window {
/// Returns true if layout actually happened, false otherwise.
#[allow(unsafe_code)]
pub fn force_reflow(&self, reflow_goal: ReflowGoal, reason: ReflowReason) -> bool {
self.Document().ensure_safe_to_run_script_or_layout();
// Check if we need to unsuppress reflow. Note that this needs to be
// *before* any early bailouts, or reflow might never be unsuppresed!
match reason {
@ -1369,12 +1369,6 @@ impl Window {
_ => (),
}
// If there is no window size, we have nothing to do.
let window_size = match self.window_size.get() {
Some(window_size) => window_size,
None => return false,
};
let for_display = reflow_goal == ReflowGoal::Full;
if for_display && self.suppress_reflow.get() {
debug!(
@ -1417,7 +1411,7 @@ impl Window {
},
document: self.Document().upcast::<Node>().to_trusted_node_address(),
stylesheets_changed,
window_size,
window_size: self.window_size.get(),
reflow_goal,
script_join_chan: join_chan,
dom_count: self.Document().dom_count(),
@ -1504,19 +1498,18 @@ impl Window {
/// may happen in the only case a query reflow may bail out, that is, if the
/// viewport size is not present). See #11223 for an example of that.
pub fn reflow(&self, reflow_goal: ReflowGoal, reason: ReflowReason) -> bool {
self.Document().ensure_safe_to_run_script_or_layout();
let for_display = reflow_goal == ReflowGoal::Full;
let mut issued_reflow = false;
if !for_display || self.Document().needs_reflow() {
issued_reflow = self.force_reflow(reflow_goal, reason);
// If window_size is `None`, we don't reflow, so the document stays
// dirty. Otherwise, we shouldn't need a reflow immediately after a
// We shouldn't need a reflow immediately after a
// reflow, except if we're waiting for a deferred paint.
assert!(
!self.Document().needs_reflow() ||
(!for_display && self.Document().needs_paint()) ||
self.window_size.get().is_none() ||
self.suppress_reflow.get()
);
} else {
@ -1801,10 +1794,10 @@ impl Window {
}
pub fn set_window_size(&self, size: WindowSizeData) {
self.window_size.set(Some(size));
self.window_size.set(size);
}
pub fn window_size(&self) -> Option<WindowSizeData> {
pub fn window_size(&self) -> WindowSizeData {
self.window_size.get()
}
@ -2021,7 +2014,7 @@ impl Window {
layout_chan: Sender<Msg>,
pipelineid: PipelineId,
parent_info: Option<PipelineId>,
window_size: Option<WindowSizeData>,
window_size: WindowSizeData,
origin: MutableOrigin,
navigation_start: u64,
navigation_start_precise: u64,

2
components/script/dom/windowproxy.rs
View file

@ -289,7 +289,7 @@ impl WindowProxy {
load_data: load_data,
pipeline_port: pipeline_receiver,
content_process_shutdown_chan: None,
window_size: None,
window_size: window.window_size(),
layout_threads: PREFS.get("layout.threads").as_u64().expect("count") as usize,
};
let constellation_msg = ScriptMsg::ScriptNewAuxiliary(load_info, pipeline_sender);

6
components/script/script_thread.rs
View file

@ -182,7 +182,7 @@ struct InProgressLoad {
/// The opener, if this is an auxiliary.
opener: Option<BrowsingContextId>,
/// The current window size associated with this pipeline.
window_size: Option<WindowSizeData>,
window_size: WindowSizeData,
/// Channel to the layout thread associated with this pipeline.
layout_chan: Sender<message::Msg>,
/// The activity level of the document (inactive, active or fully active).
@ -210,7 +210,7 @@ impl InProgressLoad {
parent_info: Option<PipelineId>,
opener: Option<BrowsingContextId>,
layout_chan: Sender<message::Msg>,
window_size: Option<WindowSizeData>,
window_size: WindowSizeData,
url: ServoUrl,
origin: MutableOrigin,
) -> InProgressLoad {
@ -1852,7 +1852,7 @@ impl ScriptThread {
}
let mut loads = self.incomplete_loads.borrow_mut();
if let Some(ref mut load) = loads.iter_mut().find(|load| load.pipeline_id == id) {
load.window_size = Some(size);
load.window_size = size;
return;
}
warn!("resize sent to nonexistent pipeline");