1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/* 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 https://mozilla.org/MPL/2.0/. */
use app_units::Au;
use euclid::default::Rect;
use euclid::Size2D;
use script_traits::UntrustedNodeAddress;
use servo_arc::Arc;
use style::properties::style_structs::Font;
use style_traits::CSSPixel;
use webrender_api::ExternalScrollId;
/// Synchronous messages that script can send to layout.
///
/// In general, you should use messages to talk to Layout. Use the RPC interface
/// if and only if the work is
///
/// 1) read-only with respect to LayoutThreadData,
/// 2) small,
/// 3) and really needs to be fast.
pub trait LayoutRPC {
/// Requests the dimensions of the content box, as in the `getBoundingClientRect()` call.
fn content_box(&self) -> ContentBoxResponse;
/// Requests the dimensions of all the content boxes, as in the `getClientRects()` call.
fn content_boxes(&self) -> ContentBoxesResponse;
/// Requests the geometry of this node. Used by APIs such as `clientTop`.
fn node_geometry(&self) -> NodeGeometryResponse;
/// Requests the scroll geometry of this node. Used by APIs such as `scrollTop`.
fn scrolling_area(&self) -> NodeGeometryResponse;
/// Requests the scroll id of this node. Used by APIs such as `scrollTop`
fn node_scroll_id(&self) -> NodeScrollIdResponse;
/// Query layout for the resolved value of a given CSS property
fn resolved_style(&self) -> ResolvedStyleResponse;
/// Query layout to get the resolved font style for canvas.
fn resolved_font_style(&self) -> Option<Arc<Font>>;
fn offset_parent(&self) -> OffsetParentResponse;
fn text_index(&self) -> TextIndexResponse;
/// Requests the list of nodes from the given point.
fn nodes_from_point_response(&self) -> Vec<UntrustedNodeAddress>;
/// Query layout to get the inner text for a given element.
fn element_inner_text(&self) -> String;
/// Get the dimensions of an iframe's inner window.
fn inner_window_dimensions(&self) -> Option<Size2D<f32, CSSPixel>>;
}
pub struct ContentBoxResponse(pub Option<Rect<Au>>);
pub struct ContentBoxesResponse(pub Vec<Rect<Au>>);
pub struct NodeGeometryResponse {
pub client_rect: Rect<i32>,
}
pub struct NodeScrollIdResponse(pub ExternalScrollId);
pub struct ResolvedStyleResponse(pub String);
#[derive(Clone)]
pub struct OffsetParentResponse {
pub node_address: Option<UntrustedNodeAddress>,
pub rect: Rect<Au>,
}
impl OffsetParentResponse {
pub fn empty() -> OffsetParentResponse {
OffsetParentResponse {
node_address: None,
rect: Rect::zero(),
}
}
}
#[derive(Clone)]
pub struct TextIndexResponse(pub Option<usize>);
|
