1 /* This Source Code Form is subject to the terms of the Mozilla Public
2  * License, v. 2.0. If a copy of the MPL was not distributed with this
3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
4 
5 use atomic_refcell::AtomicRefCell;
6 use construct::ConstructionResult;
7 use script_layout_interface::StyleData;
8 
9 #[repr(C)]
10 pub struct StyleAndLayoutData {
11     /// Data accessed by script_layout_interface. This must be first to allow
12     /// casting between StyleAndLayoutData and StyleData.
13     pub style_data: StyleData,
14     /// The layout data associated with a node.
15     pub layout_data: AtomicRefCell<LayoutData>,
16 }
17 
18 impl StyleAndLayoutData {
new() -> Self19     pub fn new() -> Self {
20         Self {
21             style_data: StyleData::new(),
22             layout_data: AtomicRefCell::new(LayoutData::new()),
23         }
24     }
25 }
26 
27 
28 /// Data that layout associates with a node.
29 #[repr(C)]
30 pub struct LayoutData {
31     /// The current results of flow construction for this node. This is either a
32     /// flow or a `ConstructionItem`. See comments in `construct.rs` for more
33     /// details.
34     pub flow_construction_result: ConstructionResult,
35 
36     pub before_flow_construction_result: ConstructionResult,
37 
38     pub after_flow_construction_result: ConstructionResult,
39 
40     pub details_summary_flow_construction_result: ConstructionResult,
41 
42     pub details_content_flow_construction_result: ConstructionResult,
43 
44     /// Various flags.
45     pub flags: LayoutDataFlags,
46 }
47 
48 impl LayoutData {
49     /// Creates new layout data.
new() -> LayoutData50     pub fn new() -> LayoutData {
51         Self {
52             flow_construction_result: ConstructionResult::None,
53             before_flow_construction_result: ConstructionResult::None,
54             after_flow_construction_result: ConstructionResult::None,
55             details_summary_flow_construction_result: ConstructionResult::None,
56             details_content_flow_construction_result: ConstructionResult::None,
57             flags: LayoutDataFlags::empty(),
58         }
59     }
60 }
61 
62 bitflags! {
63     pub struct LayoutDataFlags: u8 {
64         #[doc = "Whether a flow has been newly constructed."]
65         const HAS_NEWLY_CONSTRUCTED_FLOW = 0x01;
66         #[doc = "Whether this node has been traversed by layout."]
67         const HAS_BEEN_TRAVERSED = 0x02;
68     }
69 }
70