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
|
use crate::compositor::{Component, Compositor, Context, EventResult};
use crossterm::event::{Event, KeyCode, KeyEvent, KeyModifiers};
use tui::{
buffer::Buffer as Surface,
layout::Rect,
style::{Color, Style},
widgets::{Block, Borders},
};
use std::borrow::Cow;
use helix_core::{Position, Transaction};
use helix_view::Editor;
use crate::commands;
use crate::ui::{Menu, Popup, PromptEvent};
use helix_lsp::lsp;
use lsp::CompletionItem;
/// Wraps a Menu.
pub struct Completion {
popup: Popup<Menu<CompletionItem>>, // TODO: Popup<Menu> need to be able to access contents.
trigger_offset: usize,
// TODO: maintain a completioncontext with trigger kind & trigger char
}
impl Completion {
pub fn new(
items: Vec<CompletionItem>,
offset_encoding: helix_lsp::OffsetEncoding,
trigger_offset: usize,
) -> Self {
// let items: Vec<CompletionItem> = Vec::new();
let mut menu = Menu::new(
items,
|item| {
// format_fn
item.label.as_str().into()
// TODO: use item.filter_text for filtering
},
move |editor: &mut Editor, item, event| {
match event {
PromptEvent::Abort => {
// revert state
// let id = editor.view().doc;
// let doc = &mut editor.documents[id];
// doc.state = snapshot.clone();
}
PromptEvent::Validate => {
let (view, doc) = editor.current();
// revert state to what it was before the last update
// doc.state = snapshot.clone();
// extract as fn(doc, item):
// TODO: need to apply without composing state...
// TODO: need to update lsp on accept/cancel by diffing the snapshot with
// the final state?
// -> on update simply update the snapshot, then on accept redo the call,
// finally updating doc.changes + notifying lsp.
//
// or we could simply use doc.undo + apply when changing between options
// always present here
let item = item.unwrap();
use helix_lsp::{lsp, util};
// determine what to insert: text_edit | insert_text | label
let edit = if let Some(edit) = &item.text_edit {
match edit {
lsp::CompletionTextEdit::Edit(edit) => edit.clone(),
lsp::CompletionTextEdit::InsertAndReplace(item) => {
unimplemented!("completion: insert_and_replace {:?}", item)
}
}
} else {
item.insert_text.as_ref().unwrap_or(&item.label);
unimplemented!();
// lsp::TextEdit::new(); TODO: calculate a TextEdit from insert_text
// and we insert at position.
};
// TODO: merge edit with additional_text_edits
if let Some(additional_edits) = &item.additional_text_edits {
if !additional_edits.is_empty() {
unimplemented!(
"completion: additional_text_edits: {:?}",
additional_edits
);
}
}
// if more text was entered, remove it
let cursor = doc.selection(view.id).cursor();
if trigger_offset < cursor {
let remove = Transaction::change(
doc.text(),
vec![(trigger_offset, cursor, None)].into_iter(),
);
doc.apply(&remove, view.id);
}
use helix_lsp::OffsetEncoding;
let transaction = util::generate_transaction_from_edits(
doc.text(),
vec![edit],
offset_encoding, // TODO: should probably transcode in Client
);
doc.apply(&transaction, view.id);
}
_ => (),
};
},
);
let popup = Popup::new(menu);
Self {
popup,
trigger_offset,
}
}
pub fn update(&mut self, cx: &mut commands::Context) {
// recompute menu based on matches
let menu = self.popup.contents_mut();
let (view, doc) = cx.editor.current();
// cx.hooks()
// cx.add_hook(enum type, ||)
// cx.trigger_hook(enum type, &str, ...) <-- there has to be enough to identify doc/view
// callback with editor & compositor
//
// trigger_hook sends event into channel, that's consumed in the global loop and
// triggers all registered callbacks
// TODO: hooks should get processed immediately so maybe do it after select!(), before
// looping?
let cursor = doc.selection(view.id).cursor();
if self.trigger_offset <= cursor {
let fragment = doc.text().slice(self.trigger_offset..cursor);
let text = Cow::from(fragment);
// TODO: logic is same as ui/picker
menu.score(&text);
}
}
pub fn is_empty(&self) -> bool {
self.popup.contents().is_empty()
}
}
// need to:
// - trigger on the right trigger char
// - detect previous open instance and recycle
// - update after input, but AFTER the document has changed
// - if no more matches, need to auto close
//
// missing bits:
// - a more robust hook system: emit to a channel, process in main loop
// - a way to find specific layers in compositor
// - components register for hooks, then unregister when terminated
// ... since completion is a special case, maybe just build it into doc/render?
impl Component for Completion {
fn handle_event(&mut self, event: Event, cx: &mut Context) -> EventResult {
self.popup.handle_event(event, cx)
}
fn required_size(&mut self, viewport: (u16, u16)) -> Option<(u16, u16)> {
self.popup.required_size(viewport)
}
fn render(&self, area: Rect, surface: &mut Surface, cx: &mut Context) {
self.popup.render(area, surface, cx)
}
}
|
