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servo/components/script/dom/window.rs
rohan.prinja 1f02c4ebbb task -> thread
2016-01-10 17:58:13 +09:00

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/* This Source Code Form is subject to the terms of the Mozilla Public
* 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/. */
use app_units::Au;
use devtools_traits::{ScriptToDevtoolsControlMsg, TimelineMarker, TimelineMarkerType, WorkerId};
use dom::bindings::callback::ExceptionHandling;
use dom::bindings::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::DocumentBinding::{DocumentMethods, DocumentReadyState};
use dom::bindings::codegen::Bindings::EventHandlerBinding::{EventHandlerNonNull, OnErrorEventHandlerNonNull};
use dom::bindings::codegen::Bindings::FunctionBinding::Function;
use dom::bindings::codegen::Bindings::WindowBinding::{ScrollBehavior, ScrollToOptions};
use dom::bindings::codegen::Bindings::WindowBinding::{self, FrameRequestCallback, WindowMethods};
use dom::bindings::error::{Error, Fallible, report_pending_exception};
use dom::bindings::global::{GlobalRef, global_root_from_reflector};
use dom::bindings::inheritance::Castable;
use dom::bindings::js::RootedReference;
use dom::bindings::js::{JS, MutNullableHeap, Root};
use dom::bindings::num::Finite;
use dom::bindings::reflector::Reflectable;
use dom::bindings::utils::{GlobalStaticData, WindowProxyHandler};
use dom::browsingcontext::BrowsingContext;
use dom::console::Console;
use dom::crypto::Crypto;
use dom::cssstyledeclaration::{CSSModificationAccess, CSSStyleDeclaration};
use dom::document::Document;
use dom::element::Element;
use dom::eventtarget::EventTarget;
use dom::location::Location;
use dom::navigator::Navigator;
use dom::node::{Node, TrustedNodeAddress, from_untrusted_node_address, window_from_node};
use dom::performance::Performance;
use dom::screen::Screen;
use dom::storage::Storage;
use euclid::{Point2D, Rect, Size2D};
use gfx_traits::LayerId;
use ipc_channel::ipc::{self, IpcSender};
use js::jsapi::{Evaluate2, MutableHandleValue};
use js::jsapi::{HandleValue, JSContext};
use js::jsapi::{JSAutoCompartment, JSAutoRequest, JS_GC, JS_GetRuntime};
use js::rust::CompileOptionsWrapper;
use js::rust::Runtime;
use layout_interface::{ContentBoxResponse, ContentBoxesResponse, ResolvedStyleResponse, ScriptReflow};
use layout_interface::{LayoutChan, LayoutRPC, Msg, Reflow, ReflowGoal, ReflowQueryType};
use libc;
use msg::ParseErrorReporter;
use msg::constellation_msg::{ConstellationChan, DocumentState, LoadData};
use msg::constellation_msg::{MozBrowserEvent, PipelineId, SubpageId, WindowSizeData};
use msg::webdriver_msg::{WebDriverJSError, WebDriverJSResult};
use net_traits::ResourceThread;
use net_traits::image_cache_thread::{ImageCacheChan, ImageCacheThread};
use net_traits::storage_thread::{StorageThread, StorageType};
use num::traits::ToPrimitive;
use page::Page;
use profile_traits::mem;
use reporter::CSSErrorReporter;
use rustc_serialize::base64::{FromBase64, STANDARD, ToBase64};
use script_thread::{DOMManipulationThreadSource, UserInteractionThreadSource, NetworkingThreadSource};
use script_thread::{HistoryTraversalThreadSource, FileReadingThreadSource, SendableMainThreadScriptChan};
use script_thread::{ScriptChan, ScriptPort, MainThreadScriptChan, MainThreadScriptMsg, RunnableWrapper};
use script_traits::ScriptMsg as ConstellationMsg;
use script_traits::{MsDuration, ScriptToCompositorMsg, TimerEvent, TimerEventId, TimerEventRequest, TimerSource};
use selectors::parser::PseudoElement;
use std::ascii::AsciiExt;
use std::borrow::ToOwned;
use std::cell::Cell;
use std::collections::HashSet;
use std::default::Default;
use std::ffi::CString;
use std::io::{Write, stderr, stdout};
use std::rc::Rc;
use std::sync::Arc;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::mpsc::TryRecvError::{Disconnected, Empty};
use std::sync::mpsc::{Sender, channel};
use string_cache::Atom;
use time;
use timers::{ActiveTimers, IsInterval, ScheduledCallback, TimerCallback, TimerHandle};
use url::Url;
use util::geometry::{self, MAX_RECT};
use util::str::{DOMString, HTML_SPACE_CHARACTERS};
use util::{breakpoint, opts};
use webdriver_handlers::jsval_to_webdriver;
/// Current state of the window object
#[derive(JSTraceable, Copy, Clone, Debug, PartialEq, HeapSizeOf)]
enum WindowState {
Alive,
Zombie, // Pipeline is closed, but the window hasn't been GCed yet.
}
/// Extra information concerning the reason for reflowing.
#[derive(Debug, HeapSizeOf)]
pub enum ReflowReason {
CachedPageNeededReflow,
RefreshTick,
FirstLoad,
KeyEvent,
MouseEvent,
Query,
Timer,
Viewport,
WindowResize,
DOMContentLoaded,
DocumentLoaded,
StylesheetLoaded,
ImageLoaded,
RequestAnimationFrame,
WebFontLoaded,
}
pub type ScrollPoint = Point2D<Au>;
#[dom_struct]
pub struct Window {
eventtarget: EventTarget,
#[ignore_heap_size_of = "trait objects are hard"]
script_chan: MainThreadScriptChan,
#[ignore_heap_size_of = "thread sources are hard"]
dom_manipulation_thread_source: DOMManipulationThreadSource,
#[ignore_heap_size_of = "thread sources are hard"]
user_interaction_thread_source: UserInteractionThreadSource,
#[ignore_heap_size_of = "thread sources are hard"]
networking_thread_source: NetworkingThreadSource,
#[ignore_heap_size_of = "thread sources are hard"]
history_traversal_thread_source: HistoryTraversalThreadSource,
#[ignore_heap_size_of = "thread sources are hard"]
file_reading_thread_source: FileReadingThreadSource,
console: MutNullableHeap<JS<Console>>,
crypto: MutNullableHeap<JS<Crypto>>,
navigator: MutNullableHeap<JS<Navigator>>,
#[ignore_heap_size_of = "channels are hard"]
image_cache_thread: ImageCacheThread,
#[ignore_heap_size_of = "channels are hard"]
image_cache_chan: ImageCacheChan,
#[ignore_heap_size_of = "TODO(#6911) newtypes containing unmeasurable types are hard"]
compositor: IpcSender<ScriptToCompositorMsg>,
browsing_context: MutNullableHeap<JS<BrowsingContext>>,
page: Rc<Page>,
performance: MutNullableHeap<JS<Performance>>,
navigation_start: u64,
navigation_start_precise: f64,
screen: MutNullableHeap<JS<Screen>>,
session_storage: MutNullableHeap<JS<Storage>>,
local_storage: MutNullableHeap<JS<Storage>>,
#[ignore_heap_size_of = "channels are hard"]
scheduler_chan: IpcSender<TimerEventRequest>,
timers: ActiveTimers,
next_worker_id: Cell<WorkerId>,
/// For sending messages to the memory profiler.
#[ignore_heap_size_of = "channels are hard"]
mem_profiler_chan: mem::ProfilerChan,
/// For providing instructions to an optional devtools server.
#[ignore_heap_size_of = "channels are hard"]
devtools_chan: Option<IpcSender<ScriptToDevtoolsControlMsg>>,
/// For sending timeline markers. Will be ignored if
/// no devtools server
#[ignore_heap_size_of = "TODO(#6909) need to measure HashSet"]
devtools_markers: DOMRefCell<HashSet<TimelineMarkerType>>,
#[ignore_heap_size_of = "channels are hard"]
devtools_marker_sender: DOMRefCell<Option<IpcSender<TimelineMarker>>>,
/// A flag to indicate whether the developer tools have requested live updates of
/// page changes.
devtools_wants_updates: Cell<bool>,
next_subpage_id: Cell<SubpageId>,
/// Pending resize event, if any.
resize_event: Cell<Option<WindowSizeData>>,
/// Pipeline id associated with this page.
id: PipelineId,
/// Subpage id associated with this page, if any.
parent_info: Option<(PipelineId, SubpageId)>,
/// Global static data related to the DOM.
dom_static: GlobalStaticData,
/// The JavaScript runtime.
#[ignore_heap_size_of = "Rc<T> is hard"]
js_runtime: DOMRefCell<Option<Rc<Runtime>>>,
/// A handle for communicating messages to the layout thread.
#[ignore_heap_size_of = "channels are hard"]
layout_chan: LayoutChan,
/// A handle to perform RPC calls into the layout, quickly.
#[ignore_heap_size_of = "trait objects are hard"]
layout_rpc: Box<LayoutRPC + 'static>,
/// The current size of the window, in pixels.
window_size: Cell<Option<WindowSizeData>>,
/// Associated resource thread for use by DOM objects like XMLHttpRequest
#[ignore_heap_size_of = "channels are hard"]
resource_thread: Arc<ResourceThread>,
/// A handle for communicating messages to the storage thread.
#[ignore_heap_size_of = "channels are hard"]
storage_thread: StorageThread,
/// A handle for communicating messages to the constellation thread.
#[ignore_heap_size_of = "channels are hard"]
constellation_chan: ConstellationChan<ConstellationMsg>,
/// Pending scroll to fragment event, if any
fragment_name: DOMRefCell<Option<String>>,
/// An enlarged rectangle around the page contents visible in the viewport, used
/// to prevent creating display list items for content that is far away from the viewport.
page_clip_rect: Cell<Rect<Au>>,
/// A counter of the number of pending reflows for this window.
pending_reflow_count: Cell<u32>,
/// A channel for communicating results of async scripts back to the webdriver server
#[ignore_heap_size_of = "channels are hard"]
webdriver_script_chan: DOMRefCell<Option<IpcSender<WebDriverJSResult>>>,
/// The current state of the window object
current_state: Cell<WindowState>,
current_viewport: Cell<Rect<Au>>,
/// A flag to prevent async events from attempting to interact with this window.
#[ignore_heap_size_of = "defined in std"]
ignore_further_async_events: Arc<AtomicBool>,
error_reporter: CSSErrorReporter,
}
impl Window {
#[allow(unsafe_code)]
pub fn clear_js_runtime_for_script_deallocation(&self) {
unsafe {
*self.js_runtime.borrow_for_script_deallocation() = None;
self.browsing_context.set(None);
self.current_state.set(WindowState::Zombie);
self.ignore_further_async_events.store(true, Ordering::Relaxed);
}
}
pub fn get_cx(&self) -> *mut JSContext {
self.js_runtime.borrow().as_ref().unwrap().cx()
}
pub fn dom_manipulation_thread_source(&self) -> Box<ScriptChan + Send> {
self.dom_manipulation_thread_source.clone()
}
pub fn user_interaction_thread_source(&self) -> Box<ScriptChan + Send> {
self.user_interaction_thread_source.clone()
}
pub fn networking_thread_source(&self) -> Box<ScriptChan + Send> {
self.networking_thread_source.clone()
}
pub fn history_traversal_thread_source(&self) -> Box<ScriptChan + Send> {
self.history_traversal_thread_source.clone()
}
pub fn file_reading_thread_source(&self) -> Box<ScriptChan + Send> {
self.file_reading_thread_source.clone()
}
pub fn main_thread_script_chan(&self) -> &Sender<MainThreadScriptMsg> {
let MainThreadScriptChan(ref sender) = self.script_chan;
sender
}
pub fn image_cache_chan(&self) -> ImageCacheChan {
self.image_cache_chan.clone()
}
pub fn get_next_worker_id(&self) -> WorkerId {
let worker_id = self.next_worker_id.get();
let WorkerId(id_num) = worker_id;
self.next_worker_id.set(WorkerId(id_num + 1));
worker_id
}
pub fn pipeline(&self) -> PipelineId {
self.id
}
pub fn subpage(&self) -> Option<SubpageId> {
self.parent_info.map(|p| p.1)
}
pub fn parent_info(&self) -> Option<(PipelineId, SubpageId)> {
self.parent_info
}
pub fn new_script_pair(&self) -> (Box<ScriptChan + Send>, Box<ScriptPort + Send>) {
let (tx, rx) = channel();
(box SendableMainThreadScriptChan(tx), box rx)
}
pub fn image_cache_thread(&self) -> &ImageCacheThread {
&self.image_cache_thread
}
pub fn compositor(&self) -> &IpcSender<ScriptToCompositorMsg> {
&self.compositor
}
pub fn browsing_context(&self) -> Option<Root<BrowsingContext>> {
self.browsing_context.get()
}
pub fn page(&self) -> &Page {
&*self.page
}
pub fn storage_thread(&self) -> StorageThread {
self.storage_thread.clone()
}
pub fn css_error_reporter(&self) -> Box<ParseErrorReporter + Send> {
self.error_reporter.clone()
}
}
// https://html.spec.whatwg.org/multipage/#atob
pub fn base64_btoa(input: DOMString) -> Fallible<DOMString> {
// "The btoa() method must throw an InvalidCharacterError exception if
// the method's first argument contains any character whose code point
// is greater than U+00FF."
if input.chars().any(|c: char| c > '\u{FF}') {
Err(Error::InvalidCharacter)
} else {
// "Otherwise, the user agent must convert that argument to a
// sequence of octets whose nth octet is the eight-bit
// representation of the code point of the nth character of
// the argument,"
let octets = input.chars().map(|c: char| c as u8).collect::<Vec<u8>>();
// "and then must apply the base64 algorithm to that sequence of
// octets, and return the result. [RFC4648]"
Ok(DOMString::from(octets.to_base64(STANDARD)))
}
}
// https://html.spec.whatwg.org/multipage/#atob
pub fn base64_atob(input: DOMString) -> Fallible<DOMString> {
// "Remove all space characters from input."
// serialize::base64::from_base64 ignores \r and \n,
// but it treats the other space characters as
// invalid input.
fn is_html_space(c: char) -> bool {
HTML_SPACE_CHARACTERS.iter().any(|&m| m == c)
}
let without_spaces = input.chars()
.filter(|&c| !is_html_space(c))
.collect::<String>();
let mut input = &*without_spaces;
// "If the length of input divides by 4 leaving no remainder, then:
// if input ends with one or two U+003D EQUALS SIGN (=) characters,
// remove them from input."
if input.len() % 4 == 0 {
if input.ends_with("==") {
input = &input[..input.len() - 2]
} else if input.ends_with("=") {
input = &input[..input.len() - 1]
}
}
// "If the length of input divides by 4 leaving a remainder of 1,
// throw an InvalidCharacterError exception and abort these steps."
if input.len() % 4 == 1 {
return Err(Error::InvalidCharacter)
}
// "If input contains a character that is not in the following list of
// characters and character ranges, throw an InvalidCharacterError
// exception and abort these steps:
//
// U+002B PLUS SIGN (+)
// U+002F SOLIDUS (/)
// Alphanumeric ASCII characters"
if input.chars().any(|c| c != '+' && c != '/' && !c.is_alphanumeric()) {
return Err(Error::InvalidCharacter)
}
match input.from_base64() {
Ok(data) => Ok(DOMString::from(data.iter().map(|&b| b as char).collect::<String>())),
Err(..) => Err(Error::InvalidCharacter)
}
}
impl WindowMethods for Window {
// https://html.spec.whatwg.org/multipage/#dom-alert
fn Alert(&self, s: DOMString) {
// Right now, just print to the console
// Ensure that stderr doesn't trample through the alert() we use to
// communicate test results (see executorservo.py in wptrunner).
let stderr = stderr();
let mut stderr = stderr.lock();
let stdout = stdout();
let mut stdout = stdout.lock();
writeln!(&mut stdout, "ALERT: {}", s).unwrap();
stdout.flush().unwrap();
stderr.flush().unwrap();
// https://developer.mozilla.org/en-US/docs/Web/Events/mozbrowsershowmodalprompt
let event = MozBrowserEvent::ShowModalPrompt("alert".to_owned(), "Alert".to_owned(),
String::from(s), "".to_owned());
self.Document().trigger_mozbrowser_event(event);
}
// https://html.spec.whatwg.org/multipage/#dom-window-close
fn Close(&self) {
self.main_thread_script_chan().send(MainThreadScriptMsg::ExitWindow(self.id.clone())).unwrap();
}
// https://html.spec.whatwg.org/multipage/#dom-document-0
fn Document(&self) -> Root<Document> {
Root::from_ref(self.browsing_context().as_ref().unwrap().active_document())
}
// https://html.spec.whatwg.org/multipage/#dom-location
fn Location(&self) -> Root<Location> {
self.Document().Location()
}
// https://html.spec.whatwg.org/multipage/#dom-sessionstorage
fn SessionStorage(&self) -> Root<Storage> {
self.session_storage.or_init(|| Storage::new(&GlobalRef::Window(self), StorageType::Session))
}
// https://html.spec.whatwg.org/multipage/#dom-localstorage
fn LocalStorage(&self) -> Root<Storage> {
self.local_storage.or_init(|| Storage::new(&GlobalRef::Window(self), StorageType::Local))
}
// https://developer.mozilla.org/en-US/docs/Web/API/Console
fn Console(&self) -> Root<Console> {
self.console.or_init(|| Console::new(GlobalRef::Window(self)))
}
// https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html#dfn-GlobalCrypto
fn Crypto(&self) -> Root<Crypto> {
self.crypto.or_init(|| Crypto::new(GlobalRef::Window(self)))
}
// https://html.spec.whatwg.org/multipage/#dom-frameelement
fn GetFrameElement(&self) -> Option<Root<Element>> {
self.browsing_context().as_ref().unwrap().frame_element().map(Root::from_ref)
}
// https://html.spec.whatwg.org/multipage/#dom-navigator
fn Navigator(&self) -> Root<Navigator> {
self.navigator.or_init(|| Navigator::new(self))
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-settimeout
fn SetTimeout(&self, _cx: *mut JSContext, callback: Rc<Function>, timeout: i32, args: Vec<HandleValue>) -> i32 {
self.timers.set_timeout_or_interval(TimerCallback::FunctionTimerCallback(callback),
args,
timeout,
IsInterval::NonInterval,
TimerSource::FromWindow(self.id.clone()))
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-settimeout
fn SetTimeout_(&self, _cx: *mut JSContext, callback: DOMString, timeout: i32, args: Vec<HandleValue>) -> i32 {
self.timers.set_timeout_or_interval(TimerCallback::StringTimerCallback(callback),
args,
timeout,
IsInterval::NonInterval,
TimerSource::FromWindow(self.id.clone()))
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-cleartimeout
fn ClearTimeout(&self, handle: i32) {
self.timers.clear_timeout_or_interval(handle);
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-setinterval
fn SetInterval(&self, _cx: *mut JSContext, callback: Rc<Function>, timeout: i32, args: Vec<HandleValue>) -> i32 {
self.timers.set_timeout_or_interval(TimerCallback::FunctionTimerCallback(callback),
args,
timeout,
IsInterval::Interval,
TimerSource::FromWindow(self.id.clone()))
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-setinterval
fn SetInterval_(&self, _cx: *mut JSContext, callback: DOMString, timeout: i32, args: Vec<HandleValue>) -> i32 {
self.timers.set_timeout_or_interval(TimerCallback::StringTimerCallback(callback),
args,
timeout,
IsInterval::Interval,
TimerSource::FromWindow(self.id.clone()))
}
// https://html.spec.whatwg.org/multipage/#dom-windowtimers-clearinterval
fn ClearInterval(&self, handle: i32) {
self.ClearTimeout(handle);
}
// https://html.spec.whatwg.org/multipage/#dom-window
fn Window(&self) -> Root<Window> {
Root::from_ref(self)
}
// https://html.spec.whatwg.org/multipage/#dom-self
fn Self_(&self) -> Root<Window> {
self.Window()
}
// https://html.spec.whatwg.org/multipage/#dom-frames
fn Frames(&self) -> Root<Window> {
self.Window()
}
// https://html.spec.whatwg.org/multipage/#dom-parent
fn Parent(&self) -> Root<Window> {
self.parent().unwrap_or(self.Window())
}
// https://html.spec.whatwg.org/multipage/#dom-top
fn Top(&self) -> Root<Window> {
let mut window = self.Window();
while let Some(parent) = window.parent() {
window = parent;
}
window
}
// https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/
// NavigationTiming/Overview.html#sec-window.performance-attribute
fn Performance(&self) -> Root<Performance> {
self.performance.or_init(|| {
Performance::new(self, self.navigation_start,
self.navigation_start_precise)
})
}
// https://html.spec.whatwg.org/multipage/#globaleventhandlers
global_event_handlers!();
// https://html.spec.whatwg.org/multipage/#handler-window-onunload
event_handler!(unload, GetOnunload, SetOnunload);
// https://html.spec.whatwg.org/multipage/#handler-window-onstorage
event_handler!(storage, GetOnstorage, SetOnstorage);
// https://developer.mozilla.org/en-US/docs/Web/API/Window/screen
fn Screen(&self) -> Root<Screen> {
self.screen.or_init(|| Screen::new(self))
}
// https://html.spec.whatwg.org/multipage/#dom-windowbase64-btoa
fn Btoa(&self, btoa: DOMString) -> Fallible<DOMString> {
base64_btoa(btoa)
}
// https://html.spec.whatwg.org/multipage/#dom-windowbase64-atob
fn Atob(&self, atob: DOMString) -> Fallible<DOMString> {
base64_atob(atob)
}
/// https://html.spec.whatwg.org/multipage/#dom-window-requestanimationframe
fn RequestAnimationFrame(&self, callback: Rc<FrameRequestCallback>) -> u32 {
let doc = self.Document();
let callback = move |now: f64| {
// TODO: @jdm The spec says that any exceptions should be suppressed;
// https://github.com/servo/servo/issues/6928
let _ = callback.Call__(Finite::wrap(now), ExceptionHandling::Report);
};
doc.request_animation_frame(Box::new(callback))
}
/// https://html.spec.whatwg.org/multipage/#dom-window-cancelanimationframe
fn CancelAnimationFrame(&self, ident: u32) {
let doc = self.Document();
doc.cancel_animation_frame(ident);
}
// https://html.spec.whatwg.org/multipage/#dom-window-captureevents
fn CaptureEvents(&self) {
// This method intentionally does nothing
}
// https://html.spec.whatwg.org/multipage/#dom-window-releaseevents
fn ReleaseEvents(&self) {
// This method intentionally does nothing
}
// check-tidy: no specs after this line
fn Debug(&self, message: DOMString) {
debug!("{}", message);
}
#[allow(unsafe_code)]
fn Gc(&self) {
unsafe {
JS_GC(JS_GetRuntime(self.get_cx()));
}
}
fn Trap(&self) {
breakpoint();
}
#[allow(unsafe_code)]
fn WebdriverCallback(&self, cx: *mut JSContext, val: HandleValue) {
let rv = unsafe { jsval_to_webdriver(cx, val) };
let opt_chan = self.webdriver_script_chan.borrow_mut().take();
if let Some(chan) = opt_chan {
chan.send(rv).unwrap();
}
}
fn WebdriverTimeout(&self) {
let opt_chan = self.webdriver_script_chan.borrow_mut().take();
if let Some(chan) = opt_chan {
chan.send(Err(WebDriverJSError::Timeout)).unwrap();
}
}
// https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle
fn GetComputedStyle(&self,
element: &Element,
pseudo: Option<DOMString>) -> Root<CSSStyleDeclaration> {
// Steps 1-4.
let pseudo = match pseudo.map(|mut s| { s.make_ascii_lowercase(); s }) {
Some(ref pseudo) if pseudo == ":before" || pseudo == "::before" =>
Some(PseudoElement::Before),
Some(ref pseudo) if pseudo == ":after" || pseudo == "::after" =>
Some(PseudoElement::After),
_ => None
};
// Step 5.
CSSStyleDeclaration::new(self, element, pseudo, CSSModificationAccess::Readonly)
}
// https://drafts.csswg.org/cssom-view/#dom-window-innerheight
//TODO Include Scrollbar
fn InnerHeight(&self) -> i32 {
self.window_size.get()
.and_then(|e| e.visible_viewport.height.get().to_i32())
.unwrap_or(0)
}
// https://drafts.csswg.org/cssom-view/#dom-window-innerwidth
//TODO Include Scrollbar
fn InnerWidth(&self) -> i32 {
self.window_size.get()
.and_then(|e| e.visible_viewport.width.get().to_i32())
.unwrap_or(0)
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollx
fn ScrollX(&self) -> i32 {
self.current_viewport.get().origin.x.to_px()
}
// https://drafts.csswg.org/cssom-view/#dom-window-pagexoffset
fn PageXOffset(&self) -> i32 {
self.ScrollX()
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrolly
fn ScrollY(&self) -> i32 {
self.current_viewport.get().origin.y.to_px()
}
// https://drafts.csswg.org/cssom-view/#dom-window-pageyoffset
fn PageYOffset(&self) -> i32 {
self.ScrollY()
}
// https://drafts.csswg.org/cssom-view/#dom-window-scroll
fn Scroll(&self, options: &ScrollToOptions) {
// Step 1
let left = options.left.unwrap_or(0.0f64);
let top = options.top.unwrap_or(0.0f64);
self.scroll(left, top, options.parent.behavior);
}
// https://drafts.csswg.org/cssom-view/#dom-window-scroll
fn Scroll_(&self, x: f64, y: f64) {
self.scroll(x, y, ScrollBehavior::Auto);
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollto
fn ScrollTo(&self, options: &ScrollToOptions) {
self.Scroll(options);
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollto
fn ScrollTo_(&self, x: f64, y: f64) {
self.scroll(x, y, ScrollBehavior::Auto);
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollby
fn ScrollBy(&self, options: &ScrollToOptions) {
// Step 1
let x = options.left.unwrap_or(0.0f64);
let y = options.top.unwrap_or(0.0f64);
self.ScrollBy_(x, y);
self.scroll(x, y, options.parent.behavior);
}
// https://drafts.csswg.org/cssom-view/#dom-window-scrollby
fn ScrollBy_(&self, x: f64, y: f64) {
// Step 3
let left = x + self.ScrollX() as f64;
// Step 4
let top = y + self.ScrollY() as f64;
// Step 5
self.scroll(left, top, ScrollBehavior::Auto);
}
// https://drafts.csswg.org/cssom-view/#dom-window-resizeto
fn ResizeTo(&self, x: i32, y: i32) {
// Step 1
//TODO determine if this operation is allowed
let size = Size2D::new(x.to_u32().unwrap_or(1), y.to_u32().unwrap_or(1));
self.compositor.send(ScriptToCompositorMsg::ResizeTo(size)).unwrap()
}
// https://drafts.csswg.org/cssom-view/#dom-window-resizeby
fn ResizeBy(&self, x: i32, y: i32) {
let (size, _) = self.client_window();
// Step 1
self.ResizeTo(x + size.width.to_i32().unwrap_or(1), y + size.height.to_i32().unwrap_or(1))
}
// https://drafts.csswg.org/cssom-view/#dom-window-moveto
fn MoveTo(&self, x: i32, y: i32) {
// Step 1
//TODO determine if this operation is allowed
let point = Point2D::new(x, y);
self.compositor.send(ScriptToCompositorMsg::MoveTo(point)).unwrap()
}
// https://drafts.csswg.org/cssom-view/#dom-window-moveby
fn MoveBy(&self, x: i32, y: i32) {
let (_, origin) = self.client_window();
// Step 1
self.MoveTo(x + origin.x, y + origin.y)
}
// https://drafts.csswg.org/cssom-view/#dom-window-screenx
fn ScreenX(&self) -> i32 {
let (_, origin) = self.client_window();
origin.x
}
// https://drafts.csswg.org/cssom-view/#dom-window-screeny
fn ScreenY(&self) -> i32 {
let (_, origin) = self.client_window();
origin.y
}
// https://drafts.csswg.org/cssom-view/#dom-window-outerheight
fn OuterHeight(&self) -> i32 {
let (size, _) = self.client_window();
size.height.to_i32().unwrap_or(1)
}
// https://drafts.csswg.org/cssom-view/#dom-window-outerwidth
fn OuterWidth(&self) -> i32 {
let (size, _) = self.client_window();
size.width.to_i32().unwrap_or(1)
}
// https://drafts.csswg.org/cssom-view/#dom-window-devicepixelratio
fn DevicePixelRatio(&self) -> Finite<f64> {
let dpr = self.window_size.get().map_or(1.0f32, |data| data.device_pixel_ratio.get());
Finite::wrap(dpr as f64)
}
}
pub trait ScriptHelpers {
fn evaluate_js_on_global_with_result(self, code: &str,
rval: MutableHandleValue);
fn evaluate_script_on_global_with_result(self, code: &str, filename: &str,
rval: MutableHandleValue);
}
impl<'a, T: Reflectable> ScriptHelpers for &'a T {
fn evaluate_js_on_global_with_result(self, code: &str,
rval: MutableHandleValue) {
self.evaluate_script_on_global_with_result(code, "", rval)
}
#[allow(unsafe_code)]
fn evaluate_script_on_global_with_result(self, code: &str, filename: &str,
rval: MutableHandleValue) {
let global = global_root_from_reflector(self);
let cx = global.r().get_cx();
let _ar = JSAutoRequest::new(cx);
let globalhandle = global.r().reflector().get_jsobject();
let code: Vec<u16> = code.utf16_units().collect();
let filename = CString::new(filename).unwrap();
let _ac = JSAutoCompartment::new(cx, globalhandle.get());
let options = CompileOptionsWrapper::new(cx, filename.as_ptr(), 0);
unsafe {
if !Evaluate2(cx, options.ptr, code.as_ptr(),
code.len() as libc::size_t,
rval) {
debug!("error evaluating JS string");
report_pending_exception(cx, globalhandle.get());
}
}
}
}
impl Window {
pub fn get_runnable_wrapper(&self) -> RunnableWrapper {
RunnableWrapper {
cancelled: self.ignore_further_async_events.clone()
}
}
pub fn clear_js_runtime(&self) {
self.Document().upcast::<Node>().teardown();
// The above code may not catch all DOM objects
// (e.g. DOM objects removed from the tree that haven't
// been collected yet). Forcing a GC here means that
// those DOM objects will be able to call dispose()
// to free their layout data before the layout thread
// exits. Without this, those remaining objects try to
// send a message to free their layout data to the
// layout thread when the script thread is dropped,
// which causes a panic!
self.Gc();
self.current_state.set(WindowState::Zombie);
*self.js_runtime.borrow_mut() = None;
self.browsing_context.set(None);
self.ignore_further_async_events.store(true, Ordering::Relaxed);
}
/// https://drafts.csswg.org/cssom-view/#dom-window-scroll
pub fn scroll(&self, x_: f64, y_: f64, behavior: ScrollBehavior) {
// Step 3
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;
}
// Step 5
//TODO remove scrollbar width
let width = self.InnerWidth() as f64;
// Step 6
//TODO remove scrollbar height
let height = self.InnerHeight() as f64;
// Step 7 & 8
//TODO use overflow direction
let body = self.Document().GetBody();
let (x, y) = match body {
Some(e) => {
let content_size = e.upcast::<Node>().get_bounding_content_box();
let content_height = content_size.size.height.to_f64_px();
let content_width = content_size.size.width.to_f64_px();
(xfinite.max(0.0f64).min(content_width - width),
yfinite.max(0.0f64).min(content_height - height))
},
None => {
(xfinite.max(0.0f64), yfinite.max(0.0f64))
}
};
// Step 10
//TODO handling ongoing smooth scrolling
if x == self.ScrollX() as f64 && y == self.ScrollY() as f64 {
return;
}
//TODO Step 11
//let document = self.Document();
// Step 12
self.perform_a_scroll(x.to_f32().unwrap_or(0.0f32), y.to_f32().unwrap_or(0.0f32), behavior, None);
}
/// https://drafts.csswg.org/cssom-view/#perform-a-scroll
pub fn perform_a_scroll(&self, x: f32, y: f32, behavior: ScrollBehavior, element: Option<&Element>) {
//TODO Step 1
let point = Point2D::new(x, y);
let smooth = match behavior {
ScrollBehavior::Auto => {
element.map_or(false, |_element| {
// TODO check computed scroll-behaviour CSS property
true
})
}
ScrollBehavior::Instant => false,
ScrollBehavior::Smooth => true
};
// TODO (farodin91): Raise an event to stop the current_viewport
let size = self.current_viewport.get().size;
self.current_viewport.set(Rect::new(Point2D::new(Au::from_f32_px(x), Au::from_f32_px(y)), size));
self.compositor.send(ScriptToCompositorMsg::ScrollFragmentPoint(
self.pipeline(), LayerId::null(), point, smooth)).unwrap()
}
pub fn client_window(&self) -> (Size2D<u32>, Point2D<i32>) {
let (send, recv) = ipc::channel::<(Size2D<u32>, Point2D<i32>)>().unwrap();
self.compositor.send(ScriptToCompositorMsg::GetClientWindow(send)).unwrap();
recv.recv().unwrap_or((Size2D::zero(), Point2D::zero()))
}
/// Reflows the page unconditionally. This method will wait for the layout thread to complete
/// (but see the `TODO` below). If there is no window size yet, the page is presumed invisible
/// and no reflow is performed.
///
/// TODO(pcwalton): Only wait for style recalc, since we have off-main-thread layout.
pub fn force_reflow(&self, goal: ReflowGoal, query_type: ReflowQueryType, reason: ReflowReason) {
let window_size = match self.window_size.get() {
Some(window_size) => window_size,
None => return,
};
debug!("script: performing reflow for goal {:?} reason {:?}", goal, reason);
let marker = if self.need_emit_timeline_marker(TimelineMarkerType::Reflow) {
Some(TimelineMarker::start("Reflow".to_owned()))
} else {
None
};
// Layout will let us know when it's done.
let (join_chan, join_port) = channel();
// On debug mode, print the reflow event information.
if opts::get().relayout_event {
debug_reflow_events(&goal, &query_type, &reason);
}
let document = self.Document();
let stylesheets_changed = document.get_and_reset_stylesheets_changed_since_reflow();
// Send new document and relevant styles to layout.
let reflow = ScriptReflow {
reflow_info: Reflow {
goal: goal,
page_clip_rect: self.page_clip_rect.get(),
},
document: self.Document().upcast::<Node>().to_trusted_node_address(),
document_stylesheets: document.stylesheets().clone(),
stylesheets_changed: stylesheets_changed,
window_size: window_size,
script_join_chan: join_chan,
query_type: query_type,
};
let LayoutChan(ref chan) = self.layout_chan;
chan.send(Msg::Reflow(reflow)).unwrap();
debug!("script: layout forked");
match join_port.try_recv() {
Err(Empty) => {
info!("script: waiting on layout");
join_port.recv().unwrap();
}
Ok(_) => {}
Err(Disconnected) => {
panic!("Layout thread failed while script was waiting for a result.");
}
}
debug!("script: layout joined");
self.pending_reflow_count.set(0);
if let Some(marker) = marker {
self.emit_timeline_marker(marker.end());
}
}
/// Reflows the page if it's possible to do so and the page is dirty. This method will wait
/// for the layout thread to complete (but see the `TODO` below). If there is no window size
/// yet, the page is presumed invisible and no reflow is performed.
///
/// TODO(pcwalton): Only wait for style recalc, since we have off-main-thread layout.
pub fn reflow(&self, goal: ReflowGoal, query_type: ReflowQueryType, reason: ReflowReason) {
let for_display = query_type == ReflowQueryType::NoQuery;
if !for_display || self.Document().needs_reflow() {
self.force_reflow(goal, query_type, 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 reflow.
assert!(!self.Document().needs_reflow() || self.window_size.get().is_none());
} else {
debug!("Document doesn't need reflow - skipping it (reason {:?})", reason);
}
// If writing a screenshot, check if the script has reached a state
// where it's safe to write the image. This means that:
// 1) The reflow is for display (otherwise it could be a query)
// 2) The html element doesn't contain the 'reftest-wait' class
// 3) The load event has fired.
// When all these conditions are met, notify the constellation
// that this pipeline is ready to write the image (from the script thread
// perspective at least).
if opts::get().output_file.is_some() && for_display {
let document = self.Document();
// Checks if the html element has reftest-wait attribute present.
// See http://testthewebforward.org/docs/reftests.html
let html_element = document.GetDocumentElement();
let reftest_wait = html_element.map_or(false, |elem| {
elem.has_class(&Atom::from("reftest-wait"))
});
let ready_state = document.ReadyState();
if ready_state == DocumentReadyState::Complete && !reftest_wait {
let event = ConstellationMsg::SetDocumentState(self.id, DocumentState::Idle);
self.constellation_chan().0.send(event).unwrap();
}
}
}
pub fn layout(&self) -> &LayoutRPC {
&*self.layout_rpc
}
pub fn content_box_query(&self, content_box_request: TrustedNodeAddress) -> Rect<Au> {
self.reflow(ReflowGoal::ForScriptQuery,
ReflowQueryType::ContentBoxQuery(content_box_request),
ReflowReason::Query);
let ContentBoxResponse(rect) = self.layout_rpc.content_box();
rect
}
pub fn content_boxes_query(&self, content_boxes_request: TrustedNodeAddress) -> Vec<Rect<Au>> {
self.reflow(ReflowGoal::ForScriptQuery,
ReflowQueryType::ContentBoxesQuery(content_boxes_request),
ReflowReason::Query);
let ContentBoxesResponse(rects) = self.layout_rpc.content_boxes();
rects
}
pub fn client_rect_query(&self, node_geometry_request: TrustedNodeAddress) -> Rect<i32> {
self.reflow(ReflowGoal::ForScriptQuery,
ReflowQueryType::NodeGeometryQuery(node_geometry_request),
ReflowReason::Query);
self.layout_rpc.node_geometry().client_rect
}
pub fn resolved_style_query(&self,
element: TrustedNodeAddress,
pseudo: Option<PseudoElement>,
property: &Atom) -> Option<DOMString> {
self.reflow(ReflowGoal::ForScriptQuery,
ReflowQueryType::ResolvedStyleQuery(element, pseudo, property.clone()),
ReflowReason::Query);
let ResolvedStyleResponse(resolved) = self.layout_rpc.resolved_style();
resolved.map(DOMString::from)
}
pub fn offset_parent_query(&self, node: TrustedNodeAddress) -> (Option<Root<Element>>, Rect<Au>) {
self.reflow(ReflowGoal::ForScriptQuery,
ReflowQueryType::OffsetParentQuery(node),
ReflowReason::Query);
let response = self.layout_rpc.offset_parent();
let js_runtime = self.js_runtime.borrow();
let js_runtime = js_runtime.as_ref().unwrap();
let element = response.node_address.and_then(|parent_node_address| {
let node = from_untrusted_node_address(js_runtime.rt(), parent_node_address);
Root::downcast(node)
});
(element, response.rect)
}
pub fn init_browsing_context(&self, doc: &Document, frame_element: Option<&Element>) {
self.browsing_context.set(Some(&BrowsingContext::new(doc, frame_element)));
}
/// Commence a new URL load which will either replace this window or scroll to a fragment.
pub fn load_url(&self, url: Url) {
self.main_thread_script_chan().send(
MainThreadScriptMsg::Navigate(self.id, LoadData::new(url))).unwrap();
}
pub fn handle_fire_timer(&self, timer_id: TimerEventId) {
self.timers.fire_timer(timer_id, self);
self.reflow(ReflowGoal::ForDisplay, ReflowQueryType::NoQuery, ReflowReason::Timer);
}
pub fn set_fragment_name(&self, fragment: Option<String>) {
*self.fragment_name.borrow_mut() = fragment;
}
pub fn steal_fragment_name(&self) -> Option<String> {
self.fragment_name.borrow_mut().take()
}
pub fn set_window_size(&self, size: WindowSizeData) {
self.window_size.set(Some(size));
}
pub fn window_size(&self) -> Option<WindowSizeData> {
self.window_size.get()
}
pub fn get_url(&self) -> Url {
(*self.Document().url()).clone()
}
pub fn resource_thread(&self) -> ResourceThread {
(*self.resource_thread).clone()
}
pub fn mem_profiler_chan(&self) -> mem::ProfilerChan {
self.mem_profiler_chan.clone()
}
pub fn devtools_chan(&self) -> Option<IpcSender<ScriptToDevtoolsControlMsg>> {
self.devtools_chan.clone()
}
pub fn layout_chan(&self) -> LayoutChan {
self.layout_chan.clone()
}
pub fn constellation_chan(&self) -> ConstellationChan<ConstellationMsg> {
self.constellation_chan.clone()
}
pub fn scheduler_chan(&self) -> IpcSender<TimerEventRequest> {
self.scheduler_chan.clone()
}
pub fn schedule_callback(&self, callback: Box<ScheduledCallback>, duration: MsDuration) -> TimerHandle {
self.timers.schedule_callback(callback,
duration,
TimerSource::FromWindow(self.id.clone()))
}
pub fn unschedule_callback(&self, handle: TimerHandle) {
self.timers.unschedule_callback(handle);
}
pub fn windowproxy_handler(&self) -> WindowProxyHandler {
WindowProxyHandler(self.dom_static.windowproxy_handler.0)
}
pub fn get_next_subpage_id(&self) -> SubpageId {
let subpage_id = self.next_subpage_id.get();
let SubpageId(id_num) = subpage_id;
self.next_subpage_id.set(SubpageId(id_num + 1));
subpage_id
}
pub fn get_pending_reflow_count(&self) -> u32 {
self.pending_reflow_count.get()
}
pub fn add_pending_reflow(&self) {
self.pending_reflow_count.set(self.pending_reflow_count.get() + 1);
}
pub fn set_resize_event(&self, event: WindowSizeData) {
self.resize_event.set(Some(event));
}
pub fn steal_resize_event(&self) -> Option<WindowSizeData> {
let event = self.resize_event.get();
self.resize_event.set(None);
event
}
pub fn set_page_clip_rect_with_new_viewport(&self, viewport: Rect<f32>) -> bool {
let rect = geometry::f32_rect_to_au_rect(viewport.clone());
self.current_viewport.set(rect);
// We use a clipping rectangle that is five times the size of the of the viewport,
// so that we don't collect display list items for areas too far outside the viewport,
// but also don't trigger reflows every time the viewport changes.
static VIEWPORT_EXPANSION: f32 = 2.0; // 2 lengths on each side plus original length is 5 total.
let proposed_clip_rect = geometry::f32_rect_to_au_rect(
viewport.inflate(viewport.size.width * VIEWPORT_EXPANSION,
viewport.size.height * VIEWPORT_EXPANSION));
let clip_rect = self.page_clip_rect.get();
if proposed_clip_rect == clip_rect {
return false;
}
let had_clip_rect = clip_rect != MAX_RECT;
if had_clip_rect && !should_move_clip_rect(clip_rect, viewport) {
return false;
}
self.page_clip_rect.set(proposed_clip_rect);
// If we didn't have a clip rect, the previous display doesn't need rebuilding
// because it was built for infinite clip (MAX_RECT).
had_clip_rect
}
pub fn set_devtools_wants_updates(&self, value: bool) {
self.devtools_wants_updates.set(value);
}
// https://html.spec.whatwg.org/multipage/#accessing-other-browsing-contexts
pub fn IndexedGetter(&self, _index: u32, _found: &mut bool) -> Option<Root<Window>> {
None
}
pub fn thaw(&self) {
self.timers.resume();
// Push the document title to the compositor since we are
// activating this document due to a navigation.
self.Document().title_changed();
}
pub fn freeze(&self) {
self.timers.suspend();
}
pub fn need_emit_timeline_marker(&self, timeline_type: TimelineMarkerType) -> bool {
let markers = self.devtools_markers.borrow();
markers.contains(&timeline_type)
}
pub fn emit_timeline_marker(&self, marker: TimelineMarker) {
let sender = self.devtools_marker_sender.borrow();
let sender = sender.as_ref().expect("There is no marker sender");
sender.send(marker).unwrap();
}
pub fn set_devtools_timeline_markers(&self,
markers: Vec<TimelineMarkerType>,
reply: IpcSender<TimelineMarker>) {
*self.devtools_marker_sender.borrow_mut() = Some(reply);
self.devtools_markers.borrow_mut().extend(markers.into_iter());
}
pub fn drop_devtools_timeline_markers(&self, markers: Vec<TimelineMarkerType>) {
let mut devtools_markers = self.devtools_markers.borrow_mut();
for marker in markers {
devtools_markers.remove(&marker);
}
if devtools_markers.is_empty() {
*self.devtools_marker_sender.borrow_mut() = None;
}
}
pub fn set_webdriver_script_chan(&self, chan: Option<IpcSender<WebDriverJSResult>>) {
*self.webdriver_script_chan.borrow_mut() = chan;
}
pub fn is_alive(&self) -> bool {
self.current_state.get() == WindowState::Alive
}
pub fn parent(&self) -> Option<Root<Window>> {
let browsing_context = self.browsing_context().unwrap();
browsing_context.frame_element().map(|frame_element| {
let window = window_from_node(frame_element);
let context = window.browsing_context();
Root::from_ref(context.unwrap().active_window())
})
}
}
impl Window {
pub fn new(runtime: Rc<Runtime>,
page: Rc<Page>,
script_chan: MainThreadScriptChan,
dom_thread_source: DOMManipulationThreadSource,
user_thread_source: UserInteractionThreadSource,
network_thread_source: NetworkingThreadSource,
history_thread_source: HistoryTraversalThreadSource,
file_thread_source: FileReadingThreadSource,
image_cache_chan: ImageCacheChan,
compositor: IpcSender<ScriptToCompositorMsg>,
image_cache_thread: ImageCacheThread,
resource_thread: Arc<ResourceThread>,
storage_thread: StorageThread,
mem_profiler_chan: mem::ProfilerChan,
devtools_chan: Option<IpcSender<ScriptToDevtoolsControlMsg>>,
constellation_chan: ConstellationChan<ConstellationMsg>,
scheduler_chan: IpcSender<TimerEventRequest>,
timer_event_chan: IpcSender<TimerEvent>,
layout_chan: LayoutChan,
id: PipelineId,
parent_info: Option<(PipelineId, SubpageId)>,
window_size: Option<WindowSizeData>)
-> Root<Window> {
let layout_rpc: Box<LayoutRPC> = {
let (rpc_send, rpc_recv) = channel();
let LayoutChan(ref lchan) = layout_chan;
lchan.send(Msg::GetRPC(rpc_send)).unwrap();
rpc_recv.recv().unwrap()
};
let error_reporter = CSSErrorReporter { pipelineid: id };
let win = box Window {
eventtarget: EventTarget::new_inherited(),
script_chan: script_chan,
dom_manipulation_thread_source: dom_thread_source,
user_interaction_thread_source: user_thread_source,
networking_thread_source: network_thread_source,
history_traversal_thread_source: history_thread_source,
file_reading_thread_source: file_thread_source,
image_cache_chan: image_cache_chan,
console: Default::default(),
crypto: Default::default(),
compositor: compositor,
page: page,
navigator: Default::default(),
image_cache_thread: image_cache_thread,
mem_profiler_chan: mem_profiler_chan,
devtools_chan: devtools_chan,
browsing_context: Default::default(),
performance: Default::default(),
navigation_start: time::get_time().sec as u64,
navigation_start_precise: time::precise_time_ns() as f64,
screen: Default::default(),
session_storage: Default::default(),
local_storage: Default::default(),
scheduler_chan: scheduler_chan.clone(),
timers: ActiveTimers::new(timer_event_chan, scheduler_chan),
next_worker_id: Cell::new(WorkerId(0)),
id: id,
parent_info: parent_info,
dom_static: GlobalStaticData::new(),
js_runtime: DOMRefCell::new(Some(runtime.clone())),
resource_thread: resource_thread,
storage_thread: storage_thread,
constellation_chan: constellation_chan,
page_clip_rect: Cell::new(MAX_RECT),
fragment_name: DOMRefCell::new(None),
resize_event: Cell::new(None),
next_subpage_id: Cell::new(SubpageId(0)),
layout_chan: layout_chan,
layout_rpc: layout_rpc,
window_size: Cell::new(window_size),
current_viewport: Cell::new(Rect::zero()),
pending_reflow_count: Cell::new(0),
current_state: Cell::new(WindowState::Alive),
devtools_marker_sender: DOMRefCell::new(None),
devtools_markers: DOMRefCell::new(HashSet::new()),
devtools_wants_updates: Cell::new(false),
webdriver_script_chan: DOMRefCell::new(None),
ignore_further_async_events: Arc::new(AtomicBool::new(false)),
error_reporter: error_reporter
};
WindowBinding::Wrap(runtime.cx(), win)
}
}
fn should_move_clip_rect(clip_rect: Rect<Au>, new_viewport: Rect<f32>) -> bool {
let clip_rect = Rect::new(Point2D::new(clip_rect.origin.x.to_f32_px(),
clip_rect.origin.y.to_f32_px()),
Size2D::new(clip_rect.size.width.to_f32_px(),
clip_rect.size.height.to_f32_px()));
// We only need to move the clip rect if the viewport is getting near the edge of
// our preexisting clip rect. We use half of the size of the viewport as a heuristic
// for "close."
static VIEWPORT_SCROLL_MARGIN_SIZE: f32 = 0.5;
let viewport_scroll_margin = new_viewport.size * VIEWPORT_SCROLL_MARGIN_SIZE;
(clip_rect.origin.x - new_viewport.origin.x).abs() <= viewport_scroll_margin.width ||
(clip_rect.max_x() - new_viewport.max_x()).abs() <= viewport_scroll_margin.width ||
(clip_rect.origin.y - new_viewport.origin.y).abs() <= viewport_scroll_margin.height ||
(clip_rect.max_y() - new_viewport.max_y()).abs() <= viewport_scroll_margin.height
}
fn debug_reflow_events(goal: &ReflowGoal, query_type: &ReflowQueryType, reason: &ReflowReason) {
let mut debug_msg = "****".to_owned();
debug_msg.push_str(match *goal {
ReflowGoal::ForDisplay => "\tForDisplay",
ReflowGoal::ForScriptQuery => "\tForScriptQuery",
});
debug_msg.push_str(match *query_type {
ReflowQueryType::NoQuery => "\tNoQuery",
ReflowQueryType::ContentBoxQuery(_n) => "\tContentBoxQuery",
ReflowQueryType::ContentBoxesQuery(_n) => "\tContentBoxesQuery",
ReflowQueryType::NodeGeometryQuery(_n) => "\tNodeGeometryQuery",
ReflowQueryType::ResolvedStyleQuery(_, _, _) => "\tResolvedStyleQuery",
ReflowQueryType::OffsetParentQuery(_n) => "\tOffsetParentQuery",
});
debug_msg.push_str(match *reason {
ReflowReason::CachedPageNeededReflow => "\tCachedPageNeededReflow",
ReflowReason::RefreshTick => "\tRefreshTick",
ReflowReason::FirstLoad => "\tFirstLoad",
ReflowReason::KeyEvent => "\tKeyEvent",
ReflowReason::MouseEvent => "\tMouseEvent",
ReflowReason::Query => "\tQuery",
ReflowReason::Timer => "\tTimer",
ReflowReason::Viewport => "\tViewport",
ReflowReason::WindowResize => "\tWindowResize",
ReflowReason::DOMContentLoaded => "\tDOMContentLoaded",
ReflowReason::DocumentLoaded => "\tDocumentLoaded",
ReflowReason::StylesheetLoaded => "\tStylesheetLoaded",
ReflowReason::ImageLoaded => "\tImageLoaded",
ReflowReason::RequestAnimationFrame => "\tRequestAnimationFrame",
ReflowReason::WebFontLoaded => "\tWebFontLoaded",
});
println!("{}", debug_msg);
}
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