mirror of
https://github.com/helix-editor/helix
synced 2024-05-05 23:06:04 +02:00
924 lines
31 KiB
Rust
924 lines
31 KiB
Rust
use crate::{
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alt,
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compositor::{Component, Compositor, Context, Event, EventResult},
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ctrl, key, shift,
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ui::{self, fuzzy_match::FuzzyQuery, EditorView},
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};
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use futures_util::future::BoxFuture;
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use tui::{
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buffer::Buffer as Surface,
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layout::Constraint,
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text::{Span, Spans},
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widgets::{Block, BorderType, Borders, Cell, Table},
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};
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use fuzzy_matcher::skim::SkimMatcherV2 as Matcher;
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use tui::widgets::Widget;
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use std::cmp::{self, Ordering};
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use std::{collections::HashMap, io::Read, path::PathBuf};
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use crate::ui::{Prompt, PromptEvent};
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use helix_core::{movement::Direction, unicode::segmentation::UnicodeSegmentation, Position};
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use helix_view::{
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editor::Action,
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graphics::{CursorKind, Margin, Modifier, Rect},
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theme::Style,
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Document, DocumentId, Editor,
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};
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use super::{menu::Item, overlay::Overlay};
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pub const MIN_AREA_WIDTH_FOR_PREVIEW: u16 = 72;
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/// Biggest file size to preview in bytes
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pub const MAX_FILE_SIZE_FOR_PREVIEW: u64 = 10 * 1024 * 1024;
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#[derive(PartialEq, Eq, Hash)]
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pub enum PathOrId {
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Id(DocumentId),
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Path(PathBuf),
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}
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impl PathOrId {
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fn get_canonicalized(self) -> std::io::Result<Self> {
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use PathOrId::*;
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Ok(match self {
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Path(path) => Path(helix_core::path::get_canonicalized_path(&path)?),
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Id(id) => Id(id),
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})
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}
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}
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impl From<PathBuf> for PathOrId {
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fn from(v: PathBuf) -> Self {
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Self::Path(v)
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}
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}
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impl From<DocumentId> for PathOrId {
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fn from(v: DocumentId) -> Self {
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Self::Id(v)
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}
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}
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/// File path and range of lines (used to align and highlight lines)
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pub type FileLocation = (PathOrId, Option<(usize, usize)>);
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pub struct FilePicker<T: Item> {
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picker: Picker<T>,
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pub truncate_start: bool,
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/// Caches paths to documents
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preview_cache: HashMap<PathBuf, CachedPreview>,
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read_buffer: Vec<u8>,
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/// Given an item in the picker, return the file path and line number to display.
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file_fn: Box<dyn Fn(&Editor, &T) -> Option<FileLocation>>,
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}
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pub enum CachedPreview {
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Document(Box<Document>),
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Binary,
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LargeFile,
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NotFound,
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}
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// We don't store this enum in the cache so as to avoid lifetime constraints
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// from borrowing a document already opened in the editor.
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pub enum Preview<'picker, 'editor> {
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Cached(&'picker CachedPreview),
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EditorDocument(&'editor Document),
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}
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impl Preview<'_, '_> {
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fn document(&self) -> Option<&Document> {
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match self {
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Preview::EditorDocument(doc) => Some(doc),
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Preview::Cached(CachedPreview::Document(doc)) => Some(doc),
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_ => None,
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}
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}
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/// Alternate text to show for the preview.
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fn placeholder(&self) -> &str {
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match *self {
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Self::EditorDocument(_) => "<File preview>",
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Self::Cached(preview) => match preview {
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CachedPreview::Document(_) => "<File preview>",
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CachedPreview::Binary => "<Binary file>",
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CachedPreview::LargeFile => "<File too large to preview>",
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CachedPreview::NotFound => "<File not found>",
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},
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}
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}
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}
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impl<T: Item> FilePicker<T> {
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pub fn new(
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options: Vec<T>,
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editor_data: T::Data,
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callback_fn: impl Fn(&mut Context, &T, Action) + 'static,
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preview_fn: impl Fn(&Editor, &T) -> Option<FileLocation> + 'static,
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) -> Self {
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let truncate_start = true;
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let mut picker = Picker::new(options, editor_data, callback_fn);
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picker.truncate_start = truncate_start;
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Self {
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picker,
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truncate_start,
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preview_cache: HashMap::new(),
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read_buffer: Vec::with_capacity(1024),
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file_fn: Box::new(preview_fn),
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}
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}
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pub fn truncate_start(mut self, truncate_start: bool) -> Self {
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self.truncate_start = truncate_start;
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self.picker.truncate_start = truncate_start;
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self
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}
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fn current_file(&self, editor: &Editor) -> Option<FileLocation> {
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self.picker
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.selection()
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.and_then(|current| (self.file_fn)(editor, current))
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.and_then(|(path_or_id, line)| path_or_id.get_canonicalized().ok().zip(Some(line)))
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}
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/// Get (cached) preview for a given path. If a document corresponding
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/// to the path is already open in the editor, it is used instead.
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fn get_preview<'picker, 'editor>(
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&'picker mut self,
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path_or_id: PathOrId,
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editor: &'editor Editor,
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) -> Preview<'picker, 'editor> {
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match path_or_id {
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PathOrId::Path(path) => {
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let path = &path;
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if let Some(doc) = editor.document_by_path(path) {
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return Preview::EditorDocument(doc);
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}
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if self.preview_cache.contains_key(path) {
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return Preview::Cached(&self.preview_cache[path]);
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}
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let data = std::fs::File::open(path).and_then(|file| {
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let metadata = file.metadata()?;
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// Read up to 1kb to detect the content type
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let n = file.take(1024).read_to_end(&mut self.read_buffer)?;
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let content_type = content_inspector::inspect(&self.read_buffer[..n]);
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self.read_buffer.clear();
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Ok((metadata, content_type))
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});
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let preview = data
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.map(
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|(metadata, content_type)| match (metadata.len(), content_type) {
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(_, content_inspector::ContentType::BINARY) => CachedPreview::Binary,
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(size, _) if size > MAX_FILE_SIZE_FOR_PREVIEW => {
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CachedPreview::LargeFile
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}
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_ => {
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// TODO: enable syntax highlighting; blocked by async rendering
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Document::open(path, None, None)
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.map(|doc| CachedPreview::Document(Box::new(doc)))
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.unwrap_or(CachedPreview::NotFound)
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}
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},
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)
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.unwrap_or(CachedPreview::NotFound);
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self.preview_cache.insert(path.to_owned(), preview);
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Preview::Cached(&self.preview_cache[path])
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}
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PathOrId::Id(id) => {
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let doc = editor.documents.get(&id).unwrap();
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Preview::EditorDocument(doc)
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}
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}
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}
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fn handle_idle_timeout(&mut self, cx: &mut Context) -> EventResult {
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// Try to find a document in the cache
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let doc = self
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.current_file(cx.editor)
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.and_then(|(path, _range)| match path {
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PathOrId::Id(doc_id) => Some(doc_mut!(cx.editor, &doc_id)),
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PathOrId::Path(path) => match self.preview_cache.get_mut(&path) {
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Some(CachedPreview::Document(doc)) => Some(doc),
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_ => None,
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},
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});
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// Then attempt to highlight it if it has no language set
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if let Some(doc) = doc {
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if doc.language_config().is_none() {
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let loader = cx.editor.syn_loader.clone();
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doc.detect_language(loader);
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}
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}
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EventResult::Consumed(None)
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}
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}
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impl<T: Item + 'static> Component for FilePicker<T> {
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fn render(&mut self, area: Rect, surface: &mut Surface, cx: &mut Context) {
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// +---------+ +---------+
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// |prompt | |preview |
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// +---------+ | |
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// |picker | | |
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// | | | |
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// +---------+ +---------+
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let render_preview = self.picker.show_preview && area.width > MIN_AREA_WIDTH_FOR_PREVIEW;
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// -- Render the frame:
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// clear area
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let background = cx.editor.theme.get("ui.background");
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let text = cx.editor.theme.get("ui.text");
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surface.clear_with(area, background);
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let picker_width = if render_preview {
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area.width / 2
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} else {
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area.width
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};
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let picker_area = area.with_width(picker_width);
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self.picker.render(picker_area, surface, cx);
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if !render_preview {
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return;
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}
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let preview_area = area.clip_left(picker_width);
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// don't like this but the lifetime sucks
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let block = Block::default().borders(Borders::ALL);
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// calculate the inner area inside the box
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let inner = block.inner(preview_area);
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// 1 column gap on either side
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let margin = Margin::horizontal(1);
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let inner = inner.inner(&margin);
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block.render(preview_area, surface);
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if let Some((path, range)) = self.current_file(cx.editor) {
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let preview = self.get_preview(path, cx.editor);
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let doc = match preview.document() {
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Some(doc) => doc,
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None => {
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let alt_text = preview.placeholder();
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let x = inner.x + inner.width.saturating_sub(alt_text.len() as u16) / 2;
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let y = inner.y + inner.height / 2;
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surface.set_stringn(x, y, alt_text, inner.width as usize, text);
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return;
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}
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};
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// align to middle
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let first_line = range
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.map(|(start, end)| {
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let height = end.saturating_sub(start) + 1;
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let middle = start + (height.saturating_sub(1) / 2);
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middle.saturating_sub(inner.height as usize / 2).min(start)
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})
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.unwrap_or(0);
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let offset = Position::new(first_line, 0);
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let mut highlights =
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EditorView::doc_syntax_highlights(doc, offset, area.height, &cx.editor.theme);
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for spans in EditorView::doc_diagnostics_highlights(doc, &cx.editor.theme) {
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if spans.is_empty() {
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continue;
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}
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highlights = Box::new(helix_core::syntax::merge(highlights, spans));
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}
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EditorView::render_text_highlights(
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doc,
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offset,
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inner,
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surface,
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&cx.editor.theme,
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highlights,
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&cx.editor.config(),
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);
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// highlight the line
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if let Some((start, end)) = range {
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let offset = start.saturating_sub(first_line) as u16;
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surface.set_style(
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Rect::new(
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inner.x,
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inner.y + offset,
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inner.width,
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(end.saturating_sub(start) as u16 + 1)
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.min(inner.height.saturating_sub(offset)),
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),
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cx.editor
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.theme
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.try_get("ui.highlight")
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.unwrap_or_else(|| cx.editor.theme.get("ui.selection")),
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);
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}
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}
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}
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fn handle_event(&mut self, event: &Event, ctx: &mut Context) -> EventResult {
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if let Event::IdleTimeout = event {
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return self.handle_idle_timeout(ctx);
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}
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// TODO: keybinds for scrolling preview
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self.picker.handle_event(event, ctx)
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}
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fn cursor(&self, area: Rect, ctx: &Editor) -> (Option<Position>, CursorKind) {
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self.picker.cursor(area, ctx)
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}
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fn required_size(&mut self, (width, height): (u16, u16)) -> Option<(u16, u16)> {
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let picker_width = if width > MIN_AREA_WIDTH_FOR_PREVIEW {
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width / 2
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} else {
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width
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};
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self.picker.required_size((picker_width, height))?;
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Some((width, height))
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}
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}
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#[derive(PartialEq, Eq, Debug)]
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struct PickerMatch {
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score: i64,
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index: usize,
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len: usize,
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}
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impl PickerMatch {
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fn key(&self) -> impl Ord {
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(cmp::Reverse(self.score), self.len, self.index)
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}
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}
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impl PartialOrd for PickerMatch {
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fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
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Some(self.cmp(other))
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}
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}
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impl Ord for PickerMatch {
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fn cmp(&self, other: &Self) -> Ordering {
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self.key().cmp(&other.key())
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}
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}
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pub struct Picker<T: Item> {
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options: Vec<T>,
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editor_data: T::Data,
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// filter: String,
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matcher: Box<Matcher>,
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matches: Vec<PickerMatch>,
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/// Current height of the completions box
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completion_height: u16,
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cursor: usize,
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// pattern: String,
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prompt: Prompt,
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previous_pattern: String,
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/// Whether to truncate the start (default true)
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pub truncate_start: bool,
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/// Whether to show the preview panel (default true)
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show_preview: bool,
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/// Constraints for tabular formatting
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widths: Vec<Constraint>,
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callback_fn: Box<dyn Fn(&mut Context, &T, Action)>,
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}
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impl<T: Item> Picker<T> {
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pub fn new(
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options: Vec<T>,
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editor_data: T::Data,
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callback_fn: impl Fn(&mut Context, &T, Action) + 'static,
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) -> Self {
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let prompt = Prompt::new(
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"".into(),
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None,
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ui::completers::none,
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|_editor: &mut Context, _pattern: &str, _event: PromptEvent| {},
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);
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let n = options
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.first()
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.map(|option| option.format(&editor_data).cells.len())
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.unwrap_or_default();
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let max_lens = options.iter().fold(vec![0; n], |mut acc, option| {
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let row = option.format(&editor_data);
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// maintain max for each column
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for (acc, cell) in acc.iter_mut().zip(row.cells.iter()) {
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let width = cell.content.width();
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if width > *acc {
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*acc = width;
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}
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}
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acc
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});
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let widths = max_lens
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.into_iter()
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.map(|len| Constraint::Length(len as u16))
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.collect();
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let mut picker = Self {
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options,
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editor_data,
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matcher: Box::default(),
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matches: Vec::new(),
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cursor: 0,
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prompt,
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previous_pattern: String::new(),
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truncate_start: true,
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show_preview: true,
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callback_fn: Box::new(callback_fn),
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completion_height: 0,
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widths,
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};
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// scoring on empty input:
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// TODO: just reuse score()
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picker
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.matches
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.extend(picker.options.iter().enumerate().map(|(index, option)| {
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let text = option.filter_text(&picker.editor_data);
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PickerMatch {
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index,
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score: 0,
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len: text.chars().count(),
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}
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}));
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|
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picker
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}
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pub fn score(&mut self) {
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let pattern = self.prompt.line();
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if pattern == &self.previous_pattern {
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return;
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}
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if pattern.is_empty() {
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// Fast path for no pattern.
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self.matches.clear();
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self.matches
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.extend(self.options.iter().enumerate().map(|(index, option)| {
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let text = option.filter_text(&self.editor_data);
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PickerMatch {
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index,
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score: 0,
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len: text.chars().count(),
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}
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}));
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} else if pattern.starts_with(&self.previous_pattern) {
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let query = FuzzyQuery::new(pattern);
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// optimization: if the pattern is a more specific version of the previous one
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// then we can score the filtered set.
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self.matches.retain_mut(|pmatch| {
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let option = &self.options[pmatch.index];
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let text = option.sort_text(&self.editor_data);
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match query.fuzzy_match(&text, &self.matcher) {
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Some(s) => {
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// Update the score
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pmatch.score = s;
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true
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}
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None => false,
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}
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});
|
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self.matches.sort_unstable();
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} else {
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self.force_score();
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}
|
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|
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// reset cursor position
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self.cursor = 0;
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let pattern = self.prompt.line();
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self.previous_pattern.clone_from(pattern);
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}
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pub fn force_score(&mut self) {
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let pattern = self.prompt.line();
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let query = FuzzyQuery::new(pattern);
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self.matches.clear();
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self.matches.extend(
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self.options
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.iter()
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.enumerate()
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.filter_map(|(index, option)| {
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let text = option.filter_text(&self.editor_data);
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|
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query
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.fuzzy_match(&text, &self.matcher)
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.map(|score| PickerMatch {
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index,
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score,
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len: text.chars().count(),
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})
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}),
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);
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self.matches.sort_unstable();
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}
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|
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/// Move the cursor by a number of lines, either down (`Forward`) or up (`Backward`)
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pub fn move_by(&mut self, amount: usize, direction: Direction) {
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let len = self.matches.len();
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|
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if len == 0 {
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// No results, can't move.
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return;
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}
|
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|
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match direction {
|
|
Direction::Forward => {
|
|
self.cursor = self.cursor.saturating_add(amount) % len;
|
|
}
|
|
Direction::Backward => {
|
|
self.cursor = self.cursor.saturating_add(len).saturating_sub(amount) % len;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Move the cursor down by exactly one page. After the last page comes the first page.
|
|
pub fn page_up(&mut self) {
|
|
self.move_by(self.completion_height as usize, Direction::Backward);
|
|
}
|
|
|
|
/// Move the cursor up by exactly one page. After the first page comes the last page.
|
|
pub fn page_down(&mut self) {
|
|
self.move_by(self.completion_height as usize, Direction::Forward);
|
|
}
|
|
|
|
/// Move the cursor to the first entry
|
|
pub fn to_start(&mut self) {
|
|
self.cursor = 0;
|
|
}
|
|
|
|
/// Move the cursor to the last entry
|
|
pub fn to_end(&mut self) {
|
|
self.cursor = self.matches.len().saturating_sub(1);
|
|
}
|
|
|
|
pub fn selection(&self) -> Option<&T> {
|
|
self.matches
|
|
.get(self.cursor)
|
|
.map(|pmatch| &self.options[pmatch.index])
|
|
}
|
|
|
|
pub fn toggle_preview(&mut self) {
|
|
self.show_preview = !self.show_preview;
|
|
}
|
|
|
|
fn prompt_handle_event(&mut self, event: &Event, cx: &mut Context) -> EventResult {
|
|
if let EventResult::Consumed(_) = self.prompt.handle_event(event, cx) {
|
|
// TODO: recalculate only if pattern changed
|
|
self.score();
|
|
}
|
|
EventResult::Consumed(None)
|
|
}
|
|
}
|
|
|
|
// process:
|
|
// - read all the files into a list, maxed out at a large value
|
|
// - on input change:
|
|
// - score all the names in relation to input
|
|
|
|
impl<T: Item + 'static> Component for Picker<T> {
|
|
fn required_size(&mut self, viewport: (u16, u16)) -> Option<(u16, u16)> {
|
|
self.completion_height = viewport.1.saturating_sub(4);
|
|
Some(viewport)
|
|
}
|
|
|
|
fn handle_event(&mut self, event: &Event, cx: &mut Context) -> EventResult {
|
|
let key_event = match event {
|
|
Event::Key(event) => *event,
|
|
Event::Paste(..) => return self.prompt_handle_event(event, cx),
|
|
Event::Resize(..) => return EventResult::Consumed(None),
|
|
_ => return EventResult::Ignored(None),
|
|
};
|
|
|
|
let close_fn = EventResult::Consumed(Some(Box::new(|compositor: &mut Compositor, _cx| {
|
|
// remove the layer
|
|
compositor.last_picker = compositor.pop();
|
|
})));
|
|
|
|
// So that idle timeout retriggers
|
|
cx.editor.reset_idle_timer();
|
|
|
|
match key_event {
|
|
shift!(Tab) | key!(Up) | ctrl!('p') => {
|
|
self.move_by(1, Direction::Backward);
|
|
}
|
|
key!(Tab) | key!(Down) | ctrl!('n') => {
|
|
self.move_by(1, Direction::Forward);
|
|
}
|
|
key!(PageDown) | ctrl!('d') => {
|
|
self.page_down();
|
|
}
|
|
key!(PageUp) | ctrl!('u') => {
|
|
self.page_up();
|
|
}
|
|
key!(Home) => {
|
|
self.to_start();
|
|
}
|
|
key!(End) => {
|
|
self.to_end();
|
|
}
|
|
key!(Esc) | ctrl!('c') => {
|
|
return close_fn;
|
|
}
|
|
alt!(Enter) => {
|
|
if let Some(option) = self.selection() {
|
|
(self.callback_fn)(cx, option, Action::Load);
|
|
}
|
|
}
|
|
key!(Enter) => {
|
|
if let Some(option) = self.selection() {
|
|
(self.callback_fn)(cx, option, Action::Replace);
|
|
}
|
|
return close_fn;
|
|
}
|
|
ctrl!('s') => {
|
|
if let Some(option) = self.selection() {
|
|
(self.callback_fn)(cx, option, Action::HorizontalSplit);
|
|
}
|
|
return close_fn;
|
|
}
|
|
ctrl!('v') => {
|
|
if let Some(option) = self.selection() {
|
|
(self.callback_fn)(cx, option, Action::VerticalSplit);
|
|
}
|
|
return close_fn;
|
|
}
|
|
ctrl!('t') => {
|
|
self.toggle_preview();
|
|
}
|
|
_ => {
|
|
self.prompt_handle_event(event, cx);
|
|
}
|
|
}
|
|
|
|
EventResult::Consumed(None)
|
|
}
|
|
|
|
fn render(&mut self, area: Rect, surface: &mut Surface, cx: &mut Context) {
|
|
let text_style = cx.editor.theme.get("ui.text");
|
|
let selected = cx.editor.theme.get("ui.text.focus");
|
|
let highlight_style = cx.editor.theme.get("special").add_modifier(Modifier::BOLD);
|
|
|
|
// -- Render the frame:
|
|
// clear area
|
|
let background = cx.editor.theme.get("ui.background");
|
|
surface.clear_with(area, background);
|
|
|
|
// don't like this but the lifetime sucks
|
|
let block = Block::default().borders(Borders::ALL);
|
|
|
|
// calculate the inner area inside the box
|
|
let inner = block.inner(area);
|
|
|
|
block.render(area, surface);
|
|
|
|
// -- Render the input bar:
|
|
|
|
let area = inner.clip_left(1).with_height(1);
|
|
|
|
let count = format!("{}/{}", self.matches.len(), self.options.len());
|
|
surface.set_stringn(
|
|
(area.x + area.width).saturating_sub(count.len() as u16 + 1),
|
|
area.y,
|
|
&count,
|
|
(count.len()).min(area.width as usize),
|
|
text_style,
|
|
);
|
|
|
|
self.prompt.render(area, surface, cx);
|
|
|
|
// -- Separator
|
|
let sep_style = cx.editor.theme.get("ui.background.separator");
|
|
let borders = BorderType::line_symbols(BorderType::Plain);
|
|
for x in inner.left()..inner.right() {
|
|
if let Some(cell) = surface.get_mut(x, inner.y + 1) {
|
|
cell.set_symbol(borders.horizontal).set_style(sep_style);
|
|
}
|
|
}
|
|
|
|
// -- Render the contents:
|
|
// subtract area of prompt from top
|
|
let inner = inner.clip_top(2);
|
|
|
|
let rows = inner.height;
|
|
let offset = self.cursor - (self.cursor % std::cmp::max(1, rows as usize));
|
|
let cursor = self.cursor.saturating_sub(offset);
|
|
|
|
let options = self
|
|
.matches
|
|
.iter()
|
|
.skip(offset)
|
|
.take(rows as usize)
|
|
.map(|pmatch| &self.options[pmatch.index])
|
|
.map(|option| option.format(&self.editor_data))
|
|
.map(|mut row| {
|
|
const TEMP_CELL_SEP: &str = " ";
|
|
|
|
let line = row.cell_text().fold(String::new(), |mut s, frag| {
|
|
s.push_str(&frag);
|
|
s.push_str(TEMP_CELL_SEP);
|
|
s
|
|
});
|
|
|
|
// Items are filtered by using the text returned by menu::Item::filter_text
|
|
// but we do highlighting here using the text in Row and therefore there
|
|
// might be inconsistencies. This is the best we can do since only the
|
|
// text in Row is displayed to the end user.
|
|
let (_score, highlights) = FuzzyQuery::new(self.prompt.line())
|
|
.fuzzy_indicies(&line, &self.matcher)
|
|
.unwrap_or_default();
|
|
|
|
let highlight_byte_ranges: Vec<_> = line
|
|
.char_indices()
|
|
.enumerate()
|
|
.filter_map(|(char_idx, (byte_offset, ch))| {
|
|
highlights
|
|
.contains(&char_idx)
|
|
.then(|| byte_offset..byte_offset + ch.len_utf8())
|
|
})
|
|
.collect();
|
|
|
|
// The starting byte index of the current (iterating) cell
|
|
let mut cell_start_byte_offset = 0;
|
|
for cell in row.cells.iter_mut() {
|
|
let spans = match cell.content.lines.get(0) {
|
|
Some(s) => s,
|
|
None => continue,
|
|
};
|
|
|
|
let mut cell_len = 0;
|
|
|
|
let graphemes_with_style: Vec<_> = spans
|
|
.0
|
|
.iter()
|
|
.flat_map(|span| {
|
|
span.content
|
|
.grapheme_indices(true)
|
|
.zip(std::iter::repeat(span.style))
|
|
})
|
|
.map(|((grapheme_byte_offset, grapheme), style)| {
|
|
cell_len += grapheme.len();
|
|
let start = cell_start_byte_offset;
|
|
|
|
let grapheme_byte_range =
|
|
grapheme_byte_offset..grapheme_byte_offset + grapheme.len();
|
|
|
|
if highlight_byte_ranges.iter().any(|hl_rng| {
|
|
hl_rng.start >= start + grapheme_byte_range.start
|
|
&& hl_rng.end <= start + grapheme_byte_range.end
|
|
}) {
|
|
(grapheme, style.patch(highlight_style))
|
|
} else {
|
|
(grapheme, style)
|
|
}
|
|
})
|
|
.collect();
|
|
|
|
let mut span_list: Vec<(String, Style)> = Vec::new();
|
|
for (grapheme, style) in graphemes_with_style {
|
|
if span_list.last().map(|(_, sty)| sty) == Some(&style) {
|
|
let (string, _) = span_list.last_mut().unwrap();
|
|
string.push_str(grapheme);
|
|
} else {
|
|
span_list.push((String::from(grapheme), style))
|
|
}
|
|
}
|
|
|
|
let spans: Vec<Span> = span_list
|
|
.into_iter()
|
|
.map(|(string, style)| Span::styled(string, style))
|
|
.collect();
|
|
let spans: Spans = spans.into();
|
|
*cell = Cell::from(spans);
|
|
|
|
cell_start_byte_offset += cell_len + TEMP_CELL_SEP.len();
|
|
}
|
|
|
|
row
|
|
});
|
|
|
|
let table = Table::new(options)
|
|
.style(text_style)
|
|
.highlight_style(selected)
|
|
.highlight_symbol(" > ")
|
|
.column_spacing(1)
|
|
.widths(&self.widths);
|
|
|
|
use tui::widgets::TableState;
|
|
|
|
table.render_table(
|
|
inner,
|
|
surface,
|
|
&mut TableState {
|
|
offset: 0,
|
|
selected: Some(cursor),
|
|
},
|
|
);
|
|
}
|
|
|
|
fn cursor(&self, area: Rect, editor: &Editor) -> (Option<Position>, CursorKind) {
|
|
let block = Block::default().borders(Borders::ALL);
|
|
// calculate the inner area inside the box
|
|
let inner = block.inner(area);
|
|
|
|
// prompt area
|
|
let area = inner.clip_left(1).with_height(1);
|
|
|
|
self.prompt.cursor(area, editor)
|
|
}
|
|
}
|
|
|
|
/// Returns a new list of options to replace the contents of the picker
|
|
/// when called with the current picker query,
|
|
pub type DynQueryCallback<T> =
|
|
Box<dyn Fn(String, &mut Editor) -> BoxFuture<'static, anyhow::Result<Vec<T>>>>;
|
|
|
|
/// A picker that updates its contents via a callback whenever the
|
|
/// query string changes. Useful for live grep, workspace symbols, etc.
|
|
pub struct DynamicPicker<T: ui::menu::Item + Send> {
|
|
file_picker: FilePicker<T>,
|
|
query_callback: DynQueryCallback<T>,
|
|
query: String,
|
|
}
|
|
|
|
impl<T: ui::menu::Item + Send> DynamicPicker<T> {
|
|
pub const ID: &'static str = "dynamic-picker";
|
|
|
|
pub fn new(file_picker: FilePicker<T>, query_callback: DynQueryCallback<T>) -> Self {
|
|
Self {
|
|
file_picker,
|
|
query_callback,
|
|
query: String::new(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<T: Item + Send + 'static> Component for DynamicPicker<T> {
|
|
fn render(&mut self, area: Rect, surface: &mut Surface, cx: &mut Context) {
|
|
self.file_picker.render(area, surface, cx);
|
|
}
|
|
|
|
fn handle_event(&mut self, event: &Event, cx: &mut Context) -> EventResult {
|
|
let event_result = self.file_picker.handle_event(event, cx);
|
|
let current_query = self.file_picker.picker.prompt.line();
|
|
|
|
if !matches!(event, Event::IdleTimeout) || self.query == *current_query {
|
|
return event_result;
|
|
}
|
|
|
|
self.query.clone_from(current_query);
|
|
|
|
let new_options = (self.query_callback)(current_query.to_owned(), cx.editor);
|
|
|
|
cx.jobs.callback(async move {
|
|
let new_options = new_options.await?;
|
|
let callback =
|
|
crate::job::Callback::EditorCompositor(Box::new(move |editor, compositor| {
|
|
// Wrapping of pickers in overlay is done outside the picker code,
|
|
// so this is fragile and will break if wrapped in some other widget.
|
|
let picker = match compositor.find_id::<Overlay<DynamicPicker<T>>>(Self::ID) {
|
|
Some(overlay) => &mut overlay.content.file_picker.picker,
|
|
None => return,
|
|
};
|
|
picker.options = new_options;
|
|
picker.cursor = 0;
|
|
picker.force_score();
|
|
editor.reset_idle_timer();
|
|
}));
|
|
anyhow::Ok(callback)
|
|
});
|
|
EventResult::Consumed(None)
|
|
}
|
|
|
|
fn cursor(&self, area: Rect, ctx: &Editor) -> (Option<Position>, CursorKind) {
|
|
self.file_picker.cursor(area, ctx)
|
|
}
|
|
|
|
fn required_size(&mut self, viewport: (u16, u16)) -> Option<(u16, u16)> {
|
|
self.file_picker.required_size(viewport)
|
|
}
|
|
|
|
fn id(&self) -> Option<&'static str> {
|
|
Some(Self::ID)
|
|
}
|
|
}
|