forked from slint-ui/slint
-
Notifications
You must be signed in to change notification settings - Fork 1
/
preview.rs
379 lines (331 loc) · 12.2 KB
/
preview.rs
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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
// Copyright © SixtyFPS GmbH <[email protected]>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.1 OR LicenseRef-Slint-commercial
use std::{
collections::{HashMap, HashSet},
path::{Path, PathBuf},
sync::Mutex,
};
use crate::{
common::{PreviewComponent, PreviewConfig},
lsp_ext::Health,
};
use i_slint_core::component_factory::FactoryContext;
use slint_interpreter::{ComponentDefinition, ComponentHandle, ComponentInstance};
use lsp_types::notification::Notification;
#[cfg(target_arch = "wasm32")]
use crate::wasm_prelude::*;
mod ui;
#[cfg(all(target_arch = "wasm32", feature = "preview-external"))]
mod wasm;
#[cfg(all(target_arch = "wasm32", feature = "preview-external"))]
pub use wasm::*;
#[cfg(all(not(target_arch = "wasm32"), feature = "preview-builtin"))]
mod native;
#[cfg(all(not(target_arch = "wasm32"), feature = "preview-builtin"))]
pub use native::*;
#[derive(Default, Copy, Clone, PartialEq, Eq, Debug)]
enum PreviewFutureState {
/// The preview future is currently no running
#[default]
Pending,
/// The preview future has been started, but we haven't started compiling
PreLoading,
/// The preview future is currently loading the preview
Loading,
/// The preview future is currently loading an outdated preview, we should abort loading and restart loading again
NeedsReload,
}
#[derive(Default)]
struct ContentCache {
source_code: HashMap<PathBuf, String>,
dependency: HashSet<PathBuf>,
current: PreviewComponent,
config: PreviewConfig,
loading_state: PreviewFutureState,
highlight: Option<(PathBuf, u32)>,
ui_is_visible: bool,
design_mode: bool,
}
static CONTENT_CACHE: std::sync::OnceLock<Mutex<ContentCache>> = std::sync::OnceLock::new();
pub fn set_contents(path: &Path, content: String) {
let mut cache = CONTENT_CACHE.get_or_init(Default::default).lock().unwrap();
let old = cache.source_code.insert(path.to_owned(), content.clone());
if cache.dependency.contains(path) {
if let Some(old) = old {
if content == old {
return;
}
}
let current = cache.current.clone();
let ui_is_visible = cache.ui_is_visible;
drop(cache);
if ui_is_visible && !current.path.as_os_str().is_empty() {
load_preview(current);
}
}
}
fn set_design_mode(enable: bool) {
let mut cache = CONTENT_CACHE.get_or_init(Default::default).lock().unwrap();
cache.design_mode = enable;
configure_design_mode(enable);
}
fn change_style() {
let cache = CONTENT_CACHE.get_or_init(Default::default).lock().unwrap();
let ui_is_visible = cache.ui_is_visible;
let current = cache.current.clone();
drop(cache);
if ui_is_visible && !current.path.as_os_str().is_empty() {
load_preview(current);
}
}
pub fn start_parsing() {
set_status_text("Updating Preview...");
set_diagnostics(&[]);
send_status("Loading Preview…", Health::Ok);
}
pub fn finish_parsing(ok: bool) {
set_status_text("");
if ok {
send_status("Preview Loaded", Health::Ok);
} else {
send_status("Preview not updated", Health::Error);
}
}
pub fn config_changed(config: PreviewConfig) {
if let Some(cache) = CONTENT_CACHE.get() {
let mut cache = cache.lock().unwrap();
if cache.config != config {
cache.config = config;
let current = cache.current.clone();
let ui_is_visible = cache.ui_is_visible;
let hide_ui = cache.config.hide_ui;
drop(cache);
if ui_is_visible {
if let Some(hide_ui) = hide_ui {
set_show_preview_ui(!hide_ui);
}
if !current.path.as_os_str().is_empty() {
load_preview(current);
}
}
}
};
}
/// If the file is in the cache, returns it.
/// In any way, register it as a dependency
fn get_file_from_cache(path: PathBuf) -> Option<String> {
let mut cache = CONTENT_CACHE.get_or_init(Default::default).lock().unwrap();
let r = cache.source_code.get(&path).cloned();
cache.dependency.insert(path);
r
}
pub fn load_preview(preview_component: PreviewComponent) {
{
let mut cache = CONTENT_CACHE.get_or_init(Default::default).lock().unwrap();
cache.current = preview_component.clone();
if !cache.ui_is_visible {
return;
}
match cache.loading_state {
PreviewFutureState::Pending => (),
PreviewFutureState::PreLoading => return,
PreviewFutureState::Loading => {
cache.loading_state = PreviewFutureState::NeedsReload;
return;
}
PreviewFutureState::NeedsReload => return,
}
cache.loading_state = PreviewFutureState::PreLoading;
};
run_in_ui_thread(move || async move {
loop {
let (design_mode, preview_component, config) = {
let mut cache = CONTENT_CACHE.get_or_init(Default::default).lock().unwrap();
assert_eq!(cache.loading_state, PreviewFutureState::PreLoading);
if !cache.ui_is_visible {
cache.loading_state = PreviewFutureState::Pending;
return;
}
cache.loading_state = PreviewFutureState::Loading;
cache.dependency.clear();
let preview_component = cache.current.clone();
cache.current.style.clear();
(cache.design_mode, preview_component, cache.config.clone())
};
let style = if preview_component.style.is_empty() {
get_current_style()
} else {
set_current_style(preview_component.style.clone());
preview_component.style.clone()
};
reload_preview_impl(preview_component, style, design_mode, config).await;
let mut cache = CONTENT_CACHE.get_or_init(Default::default).lock().unwrap();
match cache.loading_state {
PreviewFutureState::Loading => {
cache.loading_state = PreviewFutureState::Pending;
return;
}
PreviewFutureState::Pending => unreachable!(),
PreviewFutureState::PreLoading => unreachable!(),
PreviewFutureState::NeedsReload => {
cache.loading_state = PreviewFutureState::PreLoading;
continue;
}
};
}
});
}
// Most be inside the thread running the slint event loop
async fn reload_preview_impl(
preview_component: PreviewComponent,
style: String,
design_mode: bool,
config: PreviewConfig,
) {
let component = PreviewComponent { style: String::new(), ..preview_component };
start_parsing();
let mut builder = slint_interpreter::ComponentCompiler::default();
#[cfg(target_arch = "wasm32")]
{
let cc = builder.compiler_configuration(i_slint_core::InternalToken);
cc.resource_url_mapper = resource_url_mapper();
}
if !style.is_empty() {
builder.set_style(style.clone());
}
builder.set_include_paths(config.include_paths);
builder.set_library_paths(config.library_paths);
builder.set_file_loader(|path| {
let path = path.to_owned();
Box::pin(async move { get_file_from_cache(path).map(Result::Ok) })
});
let compiled = if let Some(mut from_cache) = get_file_from_cache(component.path.clone()) {
if let Some(component_name) = &component.component {
from_cache = format!(
"{from_cache}\nexport component _Preview inherits {component_name} {{ }}\n"
);
}
builder.build_from_source(from_cache, component.path).await
} else {
builder.build_from_path(component.path).await
};
notify_diagnostics(builder.diagnostics());
if let Some(compiled) = compiled {
update_preview_area(compiled, design_mode);
finish_parsing(true);
} else {
finish_parsing(false);
};
}
fn configure_handle_for_design_mode(handle: &ComponentInstance, enabled: bool) {
handle.set_design_mode(enabled);
handle.on_element_selected(Box::new(
move |file: &str, start_line: u32, start_column: u32, end_line: u32, end_column: u32| {
ask_editor_to_show_document(
file.to_string(),
start_line,
start_column,
end_line,
end_column,
);
// ignore errors
},
));
}
/// This sets up the preview area to show the ComponentInstance
///
/// This must be run in the UI thread.
pub fn set_preview_factory(
ui: &ui::PreviewUi,
compiled: ComponentDefinition,
callback: Box<dyn Fn(ComponentInstance)>,
design_mode: bool,
) {
let factory = slint::ComponentFactory::new(move |ctx: FactoryContext| {
let instance = compiled.create_embedded(ctx).unwrap();
configure_handle_for_design_mode(&instance, design_mode);
if let Some((path, offset)) =
CONTENT_CACHE.get().and_then(|c| c.lock().unwrap().highlight.clone())
{
instance.highlight(path, offset);
}
callback(instance.clone_strong());
Some(instance)
});
ui.set_preview_area(factory);
}
/// Highlight the element pointed at the offset in the path.
/// When path is None, remove the highlight.
pub fn highlight(path: &Option<PathBuf>, offset: u32) {
let highlight = path.clone().map(|x| (x, offset));
let mut cache = CONTENT_CACHE.get_or_init(Default::default).lock().unwrap();
if cache.highlight == highlight {
return;
}
cache.highlight = highlight;
if cache.highlight.as_ref().map_or(true, |(path, _)| cache.dependency.contains(path)) {
let path = path.clone().unwrap_or_default();
update_highlight(path, offset);
}
}
pub fn show_document_request_from_element_callback(
file: &str,
start_line: u32,
start_column: u32,
_end_line: u32,
end_column: u32,
) -> Option<lsp_types::ShowDocumentParams> {
use lsp_types::{Position, Range, ShowDocumentParams, Url};
if file.is_empty() || start_column == 0 || end_column == 0 {
return None;
}
let start_pos = Position::new(start_line.saturating_sub(1), start_column.saturating_sub(1));
// let end_pos = Position::new(end_line.saturating_sub(1), end_column.saturating_sub(1));
// Place the cursor at the start of the range and do not mark up the entire range!
let selection = Some(Range::new(start_pos, start_pos));
Url::from_file_path(file).ok().map(|uri| ShowDocumentParams {
uri,
external: Some(false),
take_focus: Some(true),
selection,
})
}
pub fn convert_diagnostics(
diagnostics: &[slint_interpreter::Diagnostic],
) -> HashMap<lsp_types::Url, Vec<lsp_types::Diagnostic>> {
let mut result: HashMap<lsp_types::Url, Vec<lsp_types::Diagnostic>> = Default::default();
for d in diagnostics {
if d.source_file().map_or(true, |f| !i_slint_compiler::pathutils::is_absolute(f)) {
continue;
}
let uri = lsp_types::Url::from_file_path(d.source_file().unwrap())
.ok()
.unwrap_or_else(|| lsp_types::Url::parse("file:/unknown").unwrap());
result.entry(uri).or_default().push(crate::util::to_lsp_diag(d));
}
result
}
pub fn notify_lsp_diagnostics(
sender: &crate::ServerNotifier,
uri: lsp_types::Url,
diagnostics: Vec<lsp_types::Diagnostic>,
) -> Option<()> {
sender
.send_notification(
"textDocument/publishDiagnostics".into(),
lsp_types::PublishDiagnosticsParams { uri, diagnostics, version: None },
)
.ok()
}
pub fn send_status_notification(sender: &crate::ServerNotifier, message: &str, health: Health) {
sender
.send_notification(
crate::lsp_ext::ServerStatusNotification::METHOD.into(),
crate::lsp_ext::ServerStatusParams {
health,
quiescent: false,
message: Some(message.into()),
},
)
.unwrap_or_else(|e| eprintln!("Error sending notification: {:?}", e));
}