1// Copyright 2023 The AccessKit Authors. All rights reserved.
2// Licensed under the Apache License, Version 2.0 (found in
3// the LICENSE-APACHE file) or the MIT license (found in
4// the LICENSE-MIT file), at your option.
5
6use accesskit::{ActionHandler, ActionRequest};
7use accesskit_consumer::Tree;
8use std::sync::{Arc, Mutex, RwLock, RwLockReadGuard, RwLockWriteGuard};
9
10use crate::WindowBounds;
11
12/// This is an implementation detail of `accesskit_unix`, required for robust
13/// state transitions with minimal overhead.
14pub trait ActionHandlerNoMut {
15 fn do_action(&self, request: ActionRequest);
16}
17
18/// This is an implementation detail of `accesskit_unix`, required for robust
19/// state transitions with minimal overhead.
20pub struct ActionHandlerWrapper<H: ActionHandler + Send>(Mutex<H>);
21
22impl<H: 'static + ActionHandler + Send> ActionHandlerWrapper<H> {
23 pub fn new(inner: H) -> Self {
24 Self(Mutex::new(inner))
25 }
26}
27
28impl<H: ActionHandler + Send> ActionHandlerNoMut for ActionHandlerWrapper<H> {
29 fn do_action(&self, request: ActionRequest) {
30 self.0.lock().unwrap().do_action(request)
31 }
32}
33
34pub(crate) struct Context {
35 pub(crate) app_context: Arc<RwLock<AppContext>>,
36 pub(crate) tree: RwLock<Tree>,
37 pub(crate) action_handler: Arc<dyn ActionHandlerNoMut + Send + Sync>,
38 pub(crate) root_window_bounds: RwLock<WindowBounds>,
39}
40
41impl Context {
42 pub(crate) fn new(
43 app_context: &Arc<RwLock<AppContext>>,
44 tree: Tree,
45 action_handler: Arc<dyn ActionHandlerNoMut + Send + Sync>,
46 root_window_bounds: WindowBounds,
47 ) -> Arc<Self> {
48 Arc::new(Self {
49 app_context: Arc::clone(app_context),
50 tree: RwLock::new(tree),
51 action_handler,
52 root_window_bounds: RwLock::new(root_window_bounds),
53 })
54 }
55
56 pub(crate) fn read_tree(&self) -> RwLockReadGuard<'_, Tree> {
57 self.tree.read().unwrap()
58 }
59
60 pub(crate) fn read_root_window_bounds(&self) -> RwLockReadGuard<'_, WindowBounds> {
61 self.root_window_bounds.read().unwrap()
62 }
63
64 pub fn do_action(&self, request: ActionRequest) {
65 self.action_handler.do_action(request);
66 }
67
68 pub(crate) fn read_app_context(&self) -> RwLockReadGuard<'_, AppContext> {
69 self.app_context.read().unwrap()
70 }
71
72 pub(crate) fn write_app_context(&self) -> RwLockWriteGuard<'_, AppContext> {
73 self.app_context.write().unwrap()
74 }
75}
76
77pub struct AppContext {
78 pub(crate) name: Option<String>,
79 pub(crate) toolkit_name: Option<String>,
80 pub(crate) toolkit_version: Option<String>,
81 pub(crate) id: Option<i32>,
82 pub(crate) adapters: Vec<(usize, Arc<Context>)>,
83}
84
85impl AppContext {
86 pub fn new() -> Arc<RwLock<Self>> {
87 Arc::new(RwLock::new(Self {
88 name: None,
89 toolkit_name: None,
90 toolkit_version: None,
91 id: None,
92 adapters: Vec::new(),
93 }))
94 }
95
96 pub(crate) fn adapter_index(&self, id: usize) -> Result<usize, usize> {
97 self.adapters.binary_search_by(|adapter| adapter.0.cmp(&id))
98 }
99
100 pub(crate) fn push_adapter(&mut self, id: usize, context: &Arc<Context>) {
101 self.adapters.push((id, Arc::clone(context)));
102 }
103
104 pub(crate) fn remove_adapter(&mut self, id: usize) {
105 if let Ok(index) = self.adapter_index(id) {
106 self.adapters.remove(index);
107 }
108 }
109}
110