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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 https://mozilla.org/MPL/2.0/. */
//! Defines data structures which are consumed by the Compositor.
use embedder_traits::Cursor;
/// Information that Servo keeps alongside WebRender display items
/// in order to add more context to hit test results.
#[derive(Debug, Deserialize, Serialize)]
pub struct HitTestInfo {
/// The id of the node of this hit test item.
pub node: u64,
/// The cursor of this node's hit test item.
pub cursor: Option<Cursor>,
}
/// A data structure which stores compositor-side information about
/// display lists sent to the compositor.
/// by a WebRender display list.
#[derive(Debug, Default, Deserialize, Serialize)]
pub struct CompositorDisplayListInfo {
/// An array of `HitTestInfo` which is used to store information
/// to assist the compositor to take various actions (set the cursor,
/// scroll without layout) using a WebRender hit test result.
pub hit_test_info: Vec<HitTestInfo>,
}
impl CompositorDisplayListInfo {
/// Add or re-use a duplicate HitTestInfo entry in this `CompositorHitTestInfo`
/// and return the index.
pub fn add_hit_test_info(&mut self, node: u64, cursor: Option<Cursor>) -> usize {
if let Some(last) = self.hit_test_info.last() {
if node == last.node && cursor == last.cursor {
return self.hit_test_info.len() - 1;
}
}
self.hit_test_info.push(HitTestInfo { node, cursor });
self.hit_test_info.len() - 1
}
}
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