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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 dom::bindings::cell::DOMRefCell;
use dom::bindings::js::{JS, Temporary, Unrooted};
use dom::document::{Document, DocumentHelpers};
use dom::node::NodeHelpers;
use dom::window::Window;
use msg::constellation_msg::PipelineId;
use util::smallvec::SmallVec;
use std::cell::Cell;
use std::rc::Rc;
use url::Url;
/// Encapsulates a handle to a frame in a frame tree.
#[jstraceable]
pub struct Page {
/// Pipeline id associated with this page.
id: PipelineId,
/// The outermost frame containing the document and window.
frame: DOMRefCell<Option<Frame>>,
/// Cached copy of the most recent url loaded by the script, after all redirections.
/// TODO(tkuehn): this currently does not follow any particular caching policy
/// and simply caches pages forever (!).
url: Url,
/// Indicates if reflow is required when reloading.
needs_reflow: Cell<bool>,
// Child Pages.
pub children: DOMRefCell<Vec<Rc<Page>>>,
}
pub struct PageIterator {
stack: Vec<Rc<Page>>,
}
pub trait IterablePage {
fn iter(&self) -> PageIterator;
fn find(&self, id: PipelineId) -> Option<Rc<Page>>;
}
impl IterablePage for Rc<Page> {
fn iter(&self) -> PageIterator {
PageIterator {
stack: vec!(self.clone()),
}
}
fn find(&self, id: PipelineId) -> Option<Rc<Page>> {
if self.id == id { return Some(self.clone()); }
for page in self.children.borrow().iter() {
let found = page.find(id);
if found.is_some() { return found; }
}
None
}
}
impl Page {
pub fn new(id: PipelineId, url: Url) -> Page {
Page {
id: id,
frame: DOMRefCell::new(None),
url: url,
needs_reflow: Cell::new(true),
children: DOMRefCell::new(vec!()),
}
}
pub fn window(&self) -> Temporary<Window> {
Temporary::from_rooted(self.frame.borrow().as_ref().unwrap().window.clone())
}
pub fn window_for_script_deallocation(&self) -> Unrooted<Window> {
Unrooted::from_js(self.frame.borrow().as_ref().unwrap().window)
}
pub fn document(&self) -> Temporary<Document> {
Temporary::from_rooted(self.frame.borrow().as_ref().unwrap().document.clone())
}
// must handle root case separately
pub fn remove(&self, id: PipelineId) -> Option<Rc<Page>> {
let remove_idx = {
self.children
.borrow_mut()
.iter_mut()
.position(|page_tree| page_tree.id == id)
};
match remove_idx {
Some(idx) => Some(self.children.borrow_mut().remove(idx)),
None => {
self.children
.borrow_mut()
.iter_mut()
.filter_map(|page_tree| page_tree.remove(id))
.next()
}
}
}
}
impl Iterator for PageIterator {
type Item = Rc<Page>;
fn next(&mut self) -> Option<Rc<Page>> {
match self.stack.pop() {
Some(next) => {
for child in next.children.borrow().iter() {
self.stack.push(child.clone());
}
Some(next)
},
None => None,
}
}
}
impl Page {
pub fn set_reflow_status(&self, status: bool) -> bool {
let old = self.needs_reflow.get();
self.needs_reflow.set(status);
old
}
pub fn set_frame(&self, frame: Option<Frame>) {
*self.frame.borrow_mut() = frame;
}
}
/// Information for one frame in the browsing context.
#[jstraceable]
#[must_root]
pub struct Frame {
/// The document for this frame.
pub document: JS<Document>,
/// The window object for this frame.
pub window: JS<Window>,
}
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