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Add scrollWidth/Height to element interface

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Add the scrollWidth and scrollHeight extensions to the element
interface.
This commit is contained in:
Daniel Robertson 2016-03-01 16:45:16 +00:00
parent 5fbed88248
commit 16d2778ece
10 changed files with 234 additions and 39 deletions
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41
components/script/dom/node.rs
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@ -18,6 +18,7 @@ use dom::bindings::codegen::Bindings::NamedNodeMapBinding::NamedNodeMapMethods;
use dom::bindings::codegen::Bindings::NodeBinding::{NodeConstants, NodeMethods};
use dom::bindings::codegen::Bindings::NodeListBinding::NodeListMethods;
use dom::bindings::codegen::Bindings::ProcessingInstructionBinding::ProcessingInstructionMethods;
use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
use dom::bindings::codegen::UnionTypes::NodeOrString;
use dom::bindings::conversions::{self, DerivedFrom};
use dom::bindings::error::{Error, ErrorResult, Fallible};
@ -37,6 +38,7 @@ use dom::documentfragment::DocumentFragment;
use dom::documenttype::DocumentType;
use dom::element::{Element, ElementCreator};
use dom::eventtarget::EventTarget;
use dom::htmlbodyelement::HTMLBodyElement;
use dom::htmlcollection::HTMLCollection;
use dom::htmlelement::HTMLElement;
use dom::nodelist::NodeList;
@ -45,8 +47,11 @@ use dom::range::WeakRangeVec;
use dom::text::Text;
use dom::virtualmethods::{VirtualMethods, vtable_for};
use dom::window::Window;
use euclid::point::Point2D;
use euclid::rect::Rect;
use euclid::size::Size2D;
use heapsize::{HeapSizeOf, heap_size_of};
use html5ever::tree_builder::QuirksMode;
use js::jsapi::{JSContext, JSObject, JSRuntime};
use layout_interface::{LayoutChan, Msg};
use libc::{self, c_void, uintptr_t};
@ -577,6 +582,42 @@ impl Node {
window_from_node(self).client_rect_query(self.to_trusted_node_address())
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollwidth
// https://drafts.csswg.org/cssom-view/#dom-element-scrollheight
// https://drafts.csswg.org/cssom-view/#dom-element-scrolltop
// https://drafts.csswg.org/cssom-view/#dom-element-scrollleft
pub fn get_scroll_area(&self) -> Rect<i32> {
// Step 1
let document = self.owner_doc();
// Step 3
let window = document.window();
let html_element = document.GetDocumentElement();
let is_body_element = html_element.r().and_then(|root| {
let node = root.upcast::<Node>();
node.children().find(|child| { child.is::<HTMLBodyElement>() }).map(|node| {
*node.r() == *self
})
}).unwrap_or(false);
let scroll_area = window.scroll_area_query(self.to_trusted_node_address());
match (document != window.Document(), is_body_element, document.quirks_mode(),
html_element.r() == self.downcast::<Element>()) {
// Step 2 && Step 5
(true, _, _, _) | (_, false, QuirksMode::Quirks, true) => Rect::zero(),
// Step 6 && Step 7
(false, false, _, true) | (false, true, QuirksMode::Quirks, _) => {
Rect::new(Point2D::new(window.ScrollX(), window.ScrollY()),
Size2D::new(max(window.InnerWidth(), scroll_area.size.width),
max(window.InnerHeight(), scroll_area.size.height)))
},
// Step 9
_ => scroll_area
}
}
// https://dom.spec.whatwg.org/#dom-childnode-before
pub fn before(&self, nodes: Vec<NodeOrString>) -> ErrorResult {
// Step 1.