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language.rs
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// Copyright © SixtyFPS GmbH <[email protected]>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
// cSpell: ignore descr rfind unindented
pub mod completion;
mod formatting;
mod goto;
mod hover;
mod semantic_tokens;
#[cfg(test)]
pub mod test;
pub mod token_info;
use crate::common::{self, DocumentCache};
use crate::util;
#[cfg(target_arch = "wasm32")]
use crate::wasm_prelude::*;
use i_slint_compiler::object_tree::ElementRc;
use i_slint_compiler::parser::{
syntax_nodes, NodeOrToken, SyntaxKind, SyntaxNode, SyntaxToken, TextRange, TextSize,
};
use i_slint_compiler::{diagnostics::BuildDiagnostics, langtype::Type};
use lsp_types::request::{
CodeActionRequest, CodeLensRequest, ColorPresentationRequest, Completion, DocumentColor,
DocumentHighlightRequest, DocumentSymbolRequest, ExecuteCommand, Formatting, GotoDefinition,
HoverRequest, PrepareRenameRequest, Rename, SemanticTokensFullRequest,
};
use lsp_types::{
ClientCapabilities, CodeActionOrCommand, CodeActionProviderCapability, CodeLens,
CodeLensOptions, Color, ColorInformation, ColorPresentation, Command, CompletionOptions,
DocumentSymbol, DocumentSymbolResponse, InitializeParams, InitializeResult, OneOf, Position,
PrepareRenameResponse, PublishDiagnosticsParams, RenameOptions, SemanticTokensFullOptions,
SemanticTokensLegend, SemanticTokensOptions, ServerCapabilities, ServerInfo,
TextDocumentSyncCapability, TextEdit, Url, WorkDoneProgressOptions,
};
use std::cell::RefCell;
use std::collections::HashMap;
use std::future::Future;
use std::path::PathBuf;
use std::pin::Pin;
use std::rc::Rc;
const SHOW_PREVIEW_COMMAND: &str = "slint/showPreview";
fn command_list() -> Vec<String> {
vec![
#[cfg(any(feature = "preview-builtin", feature = "preview-external"))]
SHOW_PREVIEW_COMMAND.into(),
]
}
fn create_show_preview_command(
pretty: bool,
file: &lsp_types::Url,
component_name: &str,
) -> Command {
let title = format!("{}Show Preview", if pretty { &"▶ " } else { &"" });
Command::new(
title,
SHOW_PREVIEW_COMMAND.into(),
Some(vec![file.as_str().into(), component_name.into()]),
)
}
#[cfg(any(feature = "preview-external", feature = "preview-engine"))]
pub fn request_state(ctx: &std::rc::Rc<Context>) {
let document_cache = ctx.document_cache.borrow();
for (url, d) in document_cache.all_url_documents() {
if url.scheme() == "builtin" {
continue;
}
let version = document_cache.document_version(&url);
if let Some(node) = &d.node {
ctx.server_notifier.send_message_to_preview(common::LspToPreviewMessage::SetContents {
url: common::VersionedUrl::new(url, version),
contents: node.text().to_string(),
})
}
}
ctx.server_notifier.send_message_to_preview(common::LspToPreviewMessage::SetConfiguration {
config: ctx.preview_config.borrow().clone(),
});
if let Some(c) = ctx.to_show.borrow().clone() {
ctx.server_notifier.send_message_to_preview(common::LspToPreviewMessage::ShowPreview(c))
}
}
pub struct Context {
pub document_cache: RefCell<DocumentCache>,
pub preview_config: RefCell<common::PreviewConfig>,
pub server_notifier: crate::ServerNotifier,
pub init_param: InitializeParams,
/// The last component for which the user clicked "show preview"
#[cfg(any(feature = "preview-external", feature = "preview-engine"))]
pub to_show: RefCell<Option<common::PreviewComponent>>,
}
/// An error from a LSP request
pub struct LspError {
pub code: LspErrorCode,
pub message: String,
}
/// The code of a LspError. Correspond to the lsp_server::ErrorCode
pub enum LspErrorCode {
/// Invalid method parameter(s).
InvalidParameter,
/// Internal JSON-RPC error.
#[allow(unused)]
InternalError,
/// A request failed but it was syntactically correct, e.g the
/// method name was known and the parameters were valid. The error
/// message should contain human readable information about why
/// the request failed.
RequestFailed,
/// The server detected that the content of a document got
/// modified outside normal conditions. A server should
/// NOT send this error code if it detects a content change
/// in it unprocessed messages. The result even computed
/// on an older state might still be useful for the client.
///
/// If a client decides that a result is not of any use anymore
/// the client should cancel the request.
#[allow(unused)]
ContentModified = -32801,
}
#[derive(Default)]
pub struct RequestHandler(
pub HashMap<
&'static str,
Box<
dyn Fn(
serde_json::Value,
Rc<Context>,
)
-> Pin<Box<dyn Future<Output = Result<serde_json::Value, LspError>>>>,
>,
>,
);
impl RequestHandler {
pub fn register<
R: lsp_types::request::Request,
Fut: Future<Output = std::result::Result<R::Result, LspError>> + 'static,
>(
&mut self,
handler: fn(R::Params, Rc<Context>) -> Fut,
) where
R::Params: 'static,
{
self.0.insert(
R::METHOD,
Box::new(move |value, ctx| {
Box::pin(async move {
let params = serde_json::from_value(value).map_err(|e| LspError {
code: LspErrorCode::InvalidParameter,
message: format!("error when deserializing request: {e:?}"),
})?;
handler(params, ctx).await.map(|x| serde_json::to_value(x).unwrap())
})
}),
);
}
}
pub fn server_initialize_result(client_cap: &ClientCapabilities) -> InitializeResult {
InitializeResult {
capabilities: ServerCapabilities {
hover_provider: Some(true.into()),
completion_provider: Some(CompletionOptions {
resolve_provider: None,
trigger_characters: Some(vec![".".to_owned()]),
work_done_progress_options: WorkDoneProgressOptions::default(),
all_commit_characters: None,
completion_item: None,
}),
definition_provider: Some(OneOf::Left(true)),
text_document_sync: Some(TextDocumentSyncCapability::Kind(
lsp_types::TextDocumentSyncKind::FULL,
)),
code_action_provider: Some(CodeActionProviderCapability::Simple(true)),
execute_command_provider: Some(lsp_types::ExecuteCommandOptions {
commands: command_list(),
..Default::default()
}),
document_symbol_provider: Some(OneOf::Left(true)),
color_provider: Some(true.into()),
code_lens_provider: Some(CodeLensOptions { resolve_provider: Some(true) }),
semantic_tokens_provider: Some(
SemanticTokensOptions {
legend: SemanticTokensLegend {
token_types: semantic_tokens::LEGEND_TYPES.to_vec(),
token_modifiers: semantic_tokens::LEGEND_MODS.to_vec(),
},
full: Some(SemanticTokensFullOptions::Bool(true)),
..Default::default()
}
.into(),
),
document_highlight_provider: Some(OneOf::Left(true)),
rename_provider: Some(
if client_cap
.text_document
.as_ref()
.and_then(|td| td.rename.as_ref())
.and_then(|r| r.prepare_support)
.unwrap_or(false)
{
OneOf::Right(RenameOptions {
prepare_provider: Some(true),
work_done_progress_options: WorkDoneProgressOptions::default(),
})
} else {
OneOf::Left(true)
},
),
document_formatting_provider: Some(OneOf::Left(true)),
..ServerCapabilities::default()
},
server_info: Some(ServerInfo {
name: env!("CARGO_PKG_NAME").to_string(),
version: Some(env!("CARGO_PKG_VERSION").to_string()),
}),
offset_encoding: Some("utf-8".to_string()),
}
}
pub fn register_request_handlers(rh: &mut RequestHandler) {
rh.register::<GotoDefinition, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
let result = token_descr(
document_cache,
¶ms.text_document_position_params.text_document.uri,
¶ms.text_document_position_params.position,
)
.and_then(|token| goto::goto_definition(document_cache, token.0));
Ok(result)
});
rh.register::<Completion, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
let result = token_descr(
document_cache,
¶ms.text_document_position.text_document.uri,
¶ms.text_document_position.position,
)
.and_then(|token| {
completion::completion_at(
document_cache,
token.0,
token.1,
ctx.init_param
.capabilities
.text_document
.as_ref()
.and_then(|t| t.completion.as_ref()),
)
.map(Into::into)
});
Ok(result)
});
rh.register::<HoverRequest, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
let result = token_descr(
document_cache,
¶ms.text_document_position_params.text_document.uri,
¶ms.text_document_position_params.position,
)
.and_then(|(token, _)| hover::get_tooltip(document_cache, token));
Ok(result)
});
rh.register::<CodeActionRequest, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
let result = token_descr(document_cache, ¶ms.text_document.uri, ¶ms.range.start)
.and_then(|(token, _)| {
get_code_actions(document_cache, token, &ctx.init_param.capabilities)
});
Ok(result)
});
rh.register::<ExecuteCommand, _>(|params, _ctx| async move {
if params.command.as_str() == SHOW_PREVIEW_COMMAND {
#[cfg(any(feature = "preview-builtin", feature = "preview-external"))]
show_preview_command(¶ms.arguments, &_ctx)?;
return Ok(None::<serde_json::Value>);
}
Ok(None::<serde_json::Value>)
});
rh.register::<DocumentColor, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
Ok(get_document_color(document_cache, ¶ms.text_document).unwrap_or_default())
});
rh.register::<ColorPresentationRequest, _>(|params, _ctx| async move {
// Convert the color from the color picker to a string representation. This could try to produce a minimal
// representation.
let requested_color = params.color;
let color_literal = if requested_color.alpha < 1. {
format!(
"#{:0>2x}{:0>2x}{:0>2x}{:0>2x}",
(requested_color.red * 255.) as u8,
(requested_color.green * 255.) as u8,
(requested_color.blue * 255.) as u8,
(requested_color.alpha * 255.) as u8
)
} else {
format!(
"#{:0>2x}{:0>2x}{:0>2x}",
(requested_color.red * 255.) as u8,
(requested_color.green * 255.) as u8,
(requested_color.blue * 255.) as u8,
)
};
Ok(vec![ColorPresentation { label: color_literal, ..Default::default() }])
});
rh.register::<DocumentSymbolRequest, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
Ok(get_document_symbols(document_cache, ¶ms.text_document))
});
rh.register::<CodeLensRequest, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
Ok(get_code_lenses(document_cache, ¶ms.text_document))
});
rh.register::<SemanticTokensFullRequest, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
Ok(semantic_tokens::get_semantic_tokens(document_cache, ¶ms.text_document))
});
rh.register::<DocumentHighlightRequest, _>(|params, ctx| async move {
let document_cache = &mut ctx.document_cache.borrow_mut();
let uri = params.text_document_position_params.text_document.uri;
if let Some((tk, _)) =
token_descr(document_cache, &uri, ¶ms.text_document_position_params.position)
{
let p = tk.parent();
let gp = p.parent();
if p.kind() == SyntaxKind::QualifiedName
&& gp.as_ref().map_or(false, |n| n.kind() == SyntaxKind::Element)
{
let range = util::node_to_lsp_range(&p);
ctx.server_notifier.send_message_to_preview(
common::LspToPreviewMessage::HighlightFromEditor {
url: Some(uri),
offset: gp.unwrap().text_range().start().into(),
},
);
return Ok(Some(vec![lsp_types::DocumentHighlight { range, kind: None }]));
}
if let Some(value) = find_element_id_for_highlight(&tk, &p) {
ctx.server_notifier.send_message_to_preview(
common::LspToPreviewMessage::HighlightFromEditor { url: None, offset: 0 },
);
return Ok(Some(
value
.into_iter()
.map(|r| lsp_types::DocumentHighlight {
range: util::text_range_to_lsp_range(&p.source_file, r),
kind: None,
})
.collect(),
));
}
}
ctx.server_notifier.send_message_to_preview(
common::LspToPreviewMessage::HighlightFromEditor { url: None, offset: 0 },
);
Ok(None)
});
rh.register::<Rename, _>(|params, ctx| async move {
let mut document_cache = ctx.document_cache.borrow_mut();
let uri = params.text_document_position.text_document.uri;
if let Some((tk, _off)) =
token_descr(&mut document_cache, &uri, ¶ms.text_document_position.position)
{
let p = tk.parent();
let version = document_cache.document_version(&uri);
if let Some(value) = find_element_id_for_highlight(&tk, &p) {
let edits: Vec<_> = value
.into_iter()
.map(|r| TextEdit {
range: util::text_range_to_lsp_range(&p.source_file, r),
new_text: params.new_name.clone(),
})
.collect();
return Ok(Some(common::create_workspace_edit(uri, version, edits)));
}
match p.kind() {
SyntaxKind::DeclaredIdentifier => {
common::rename_component::rename_component_from_definition(
&document_cache,
&p.into(),
¶ms.new_name,
)
.map(Some)
.map_err(|e| LspError {
code: LspErrorCode::RequestFailed,
message: e.to_string(),
})
}
_ => Err(LspError {
code: LspErrorCode::RequestFailed,
message: "This symbol cannot be renamed.".into(),
}),
}
} else {
Err(LspError {
code: LspErrorCode::RequestFailed,
message: "This symbol cannot be renamed.".into(),
})
}
});
rh.register::<PrepareRenameRequest, _>(|params, ctx| async move {
let mut document_cache = ctx.document_cache.borrow_mut();
let uri = params.text_document.uri;
if let Some((tk, _off)) = token_descr(&mut document_cache, &uri, ¶ms.position) {
if find_element_id_for_highlight(&tk, &tk.parent()).is_some() {
return Ok(Some(PrepareRenameResponse::Range(util::token_to_lsp_range(&tk))));
}
let p = tk.parent();
if matches!(p.kind(), SyntaxKind::DeclaredIdentifier) {
if let Some(gp) = p.parent() {
if gp.kind() == SyntaxKind::Component {
return Ok(Some(PrepareRenameResponse::Range(util::node_to_lsp_range(&p))));
}
}
}
}
Ok(None)
});
rh.register::<Formatting, _>(|params, ctx| async move {
let document_cache = ctx.document_cache.borrow_mut();
Ok(formatting::format_document(params, &document_cache))
});
}
/// extract the parameter at given index. name is used in the error
#[cfg(any(feature = "preview-builtin", feature = "preview-external"))]
fn extract_param<T: serde::de::DeserializeOwned>(
params: &[serde_json::Value],
index: usize,
name: &str,
) -> Result<T, LspError> {
let p = params.get(index).ok_or_else(|| LspError {
code: LspErrorCode::InvalidParameter,
message: format!("{} parameter is missing", name),
})?;
serde_json::from_value(p.clone()).map_err(|e| LspError {
code: LspErrorCode::InvalidParameter,
message: format!("{} parameter is invalid: {}", name, e),
})
}
#[cfg(any(feature = "preview-builtin", feature = "preview-external"))]
pub fn show_preview_command(
params: &[serde_json::Value],
ctx: &Rc<Context>,
) -> Result<(), LspError> {
let document_cache = &mut ctx.document_cache.borrow_mut();
let config = document_cache.compiler_configuration();
let url: Url = extract_param(params, 0, "url")?;
// Normalize the URL to make sure it is encoded the same way as what the preview expect from other URLs
let url =
common::uri_to_file(&url).and_then(|u| Url::from_file_path(u).ok()).ok_or_else(|| {
LspError {
code: LspErrorCode::InvalidParameter,
message: "invalid document url".into(),
}
})?;
let component =
params.get(1).and_then(|v| v.as_str()).filter(|v| !v.is_empty()).map(|v| v.to_string());
let c = common::PreviewComponent {
url,
component,
style: config.style.clone().unwrap_or_default(),
};
ctx.to_show.replace(Some(c.clone()));
ctx.server_notifier.send_message_to_preview(common::LspToPreviewMessage::ShowPreview(c));
Ok(())
}
pub(crate) async fn reload_document_impl(
ctx: Option<&Rc<Context>>,
mut content: String,
url: lsp_types::Url,
version: Option<i32>,
document_cache: &mut DocumentCache,
) -> HashMap<Url, Vec<lsp_types::Diagnostic>> {
let Some(path) = common::uri_to_file(&url) else { return Default::default() };
// Normalize the URL
let Ok(url) = Url::from_file_path(path.clone()) else { return Default::default() };
if path.extension().map_or(false, |e| e == "rs") {
content = match i_slint_compiler::lexer::extract_rust_macro(content) {
Some(content) => content,
// A rust file without a rust macro, just ignore it
None => return [(url, vec![])].into_iter().collect(),
};
}
if let Some(ctx) = ctx {
ctx.server_notifier.send_message_to_preview(common::LspToPreviewMessage::SetContents {
url: common::VersionedUrl::new(url.clone(), version),
contents: content.clone(),
});
}
let mut diag = BuildDiagnostics::default();
let _ = document_cache.load_url(&url, version, content, &mut diag).await; // ignore url conversion errors
// Always provide diagnostics for all files. Empty diagnostics clear any previous ones.
let mut lsp_diags: HashMap<Url, Vec<lsp_types::Diagnostic>> = core::iter::once(&path)
.chain(diag.all_loaded_files.iter())
.map(|path| {
let uri = Url::from_file_path(path).unwrap();
(uri, Default::default())
})
.collect();
for d in diag.into_iter() {
#[cfg(not(target_arch = "wasm32"))]
if d.source_file().unwrap().is_relative() {
continue;
}
let uri = Url::from_file_path(d.source_file().unwrap()).unwrap();
lsp_diags.entry(uri).or_default().push(util::to_lsp_diag(&d));
}
lsp_diags
}
pub async fn reload_document(
ctx: &Rc<Context>,
content: String,
url: lsp_types::Url,
version: Option<i32>,
document_cache: &mut DocumentCache,
) -> common::Result<()> {
let lsp_diags =
reload_document_impl(Some(ctx), content, url.clone(), version, document_cache).await;
for (uri, diagnostics) in lsp_diags {
let version = document_cache.document_version(&uri);
ctx.server_notifier.send_notification::<lsp_types::notification::PublishDiagnostics>(
PublishDiagnosticsParams { uri, diagnostics, version },
)?;
}
Ok(())
}
/// return the token, and the offset within the file
fn token_descr(
document_cache: &mut DocumentCache,
text_document_uri: &Url,
pos: &Position,
) -> Option<(SyntaxToken, TextSize)> {
let (doc, o) = document_cache.get_document_and_offset(text_document_uri, pos)?;
let node = doc.node.as_ref()?;
let token = token_at_offset(node, o)?;
Some((token, o))
}
/// Return the token that matches best the token at cursor position
pub fn token_at_offset(doc: &syntax_nodes::Document, offset: TextSize) -> Option<SyntaxToken> {
let mut taf = doc.token_at_offset(offset);
let token = match (taf.next(), taf.next()) {
(None, _) => doc.last_token()?,
(Some(t), None) => t,
(Some(l), Some(r)) => match (l.kind(), r.kind()) {
// Prioritize identifier
(SyntaxKind::Identifier, _) => l,
(_, SyntaxKind::Identifier) => r,
// then the dot
(SyntaxKind::Dot, _) => l,
(_, SyntaxKind::Dot) => r,
// de-prioritize the white spaces
(SyntaxKind::Whitespace, _) => r,
(SyntaxKind::Comment, _) => r,
(_, SyntaxKind::Whitespace) => l,
(_, SyntaxKind::Comment) => l,
_ => l,
},
};
Some(token)
}
fn has_experimental_client_capability(capabilities: &ClientCapabilities, name: &str) -> bool {
capabilities
.experimental
.as_ref()
.and_then(|o| o.get(name).and_then(|v| v.as_bool()))
.unwrap_or(false)
}
fn get_code_actions(
document_cache: &mut DocumentCache,
token: SyntaxToken,
client_capabilities: &ClientCapabilities,
) -> Option<Vec<CodeActionOrCommand>> {
let node = token.parent();
let uri = Url::from_file_path(token.source_file.path()).ok()?;
let mut result = vec![];
let component = syntax_nodes::Component::new(node.clone())
.or_else(|| {
syntax_nodes::DeclaredIdentifier::new(node.clone())
.and_then(|n| n.parent())
.and_then(syntax_nodes::Component::new)
})
.or_else(|| {
syntax_nodes::QualifiedName::new(node.clone())
.and_then(|n| n.parent())
.and_then(syntax_nodes::Element::new)
.and_then(|n| n.parent())
.and_then(syntax_nodes::Component::new)
});
#[cfg(any(feature = "preview-builtin", feature = "preview-external"))]
{
if let Some(component) = &component {
if let Some(component_name) =
i_slint_compiler::parser::identifier_text(&component.DeclaredIdentifier())
{
result.push(CodeActionOrCommand::Command(create_show_preview_command(
false,
&uri,
&component_name,
)))
}
}
}
if token.kind() == SyntaxKind::StringLiteral && node.kind() == SyntaxKind::Expression {
let r = util::text_range_to_lsp_range(&token.source_file, node.text_range());
let edits = vec![
TextEdit::new(lsp_types::Range::new(r.start, r.start), "@tr(".into()),
TextEdit::new(lsp_types::Range::new(r.end, r.end), ")".into()),
];
result.push(CodeActionOrCommand::CodeAction(lsp_types::CodeAction {
title: "Wrap in `@tr()`".into(),
edit: common::create_workspace_edit_from_path(
document_cache,
token.source_file.path(),
edits,
),
..Default::default()
}));
} else if token.kind() == SyntaxKind::Identifier
&& node.kind() == SyntaxKind::QualifiedName
&& node.parent().map(|n| n.kind()) == Some(SyntaxKind::Element)
{
let is_lookup_error = {
let global_tr = document_cache.global_type_registry();
let tr = document_cache
.get_document_for_source_file(&token.source_file)
.map(|doc| &doc.local_registry)
.unwrap_or(&global_tr);
util::lookup_current_element_type(node.clone(), tr).is_none()
};
if is_lookup_error {
// Couldn't lookup the element, there is probably an error. Suggest an edit
let text = token.text();
completion::build_import_statements_edits(
&token,
document_cache,
&mut |ci| !ci.is_global && ci.is_exported && ci.name == text,
&mut |_name, file, edit| {
result.push(CodeActionOrCommand::CodeAction(lsp_types::CodeAction {
title: format!("Add import from \"{file}\""),
kind: Some(lsp_types::CodeActionKind::QUICKFIX),
edit: common::create_workspace_edit_from_path(
document_cache,
token.source_file.path(),
vec![edit],
),
..Default::default()
}))
},
);
}
if has_experimental_client_capability(client_capabilities, "snippetTextEdit") {
let r = util::text_range_to_lsp_range(
&token.source_file,
node.parent().unwrap().text_range(),
);
let element = document_cache.element_at_position(&uri, &r.start);
let element_indent = element.as_ref().and_then(util::find_element_indent);
let indented_lines = node
.parent()
.unwrap()
.text()
.to_string()
.lines()
.map(
|line| if line.is_empty() { line.to_string() } else { format!(" {}", line) },
)
.collect::<Vec<String>>();
let edits = vec![TextEdit::new(
lsp_types::Range::new(r.start, r.end),
format!(
"${{0:element}} {{\n{}{}\n}}",
element_indent.unwrap_or("".into()),
indented_lines.join("\n")
),
)];
result.push(CodeActionOrCommand::CodeAction(lsp_types::CodeAction {
title: "Wrap in element".into(),
kind: Some(lsp_types::CodeActionKind::REFACTOR),
edit: common::create_workspace_edit_from_path(
document_cache,
token.source_file.path(),
edits,
),
..Default::default()
}));
// Collect all normal, repeated, and conditional sub-elements and any
// whitespace in between for substituting the parent element with its
// sub-elements, dropping its own properties, callbacks etc.
fn is_sub_element(kind: SyntaxKind) -> bool {
matches!(
kind,
SyntaxKind::SubElement
| SyntaxKind::RepeatedElement
| SyntaxKind::ConditionalElement
)
}
let sub_elements = node
.parent()
.unwrap()
.children_with_tokens()
.skip_while(|n| !is_sub_element(n.kind()))
.filter(|n| match n {
NodeOrToken::Node(_) => is_sub_element(n.kind()),
NodeOrToken::Token(t) => {
t.kind() == SyntaxKind::Whitespace
&& t.next_sibling_or_token().map_or(false, |n| is_sub_element(n.kind()))
}
})
.collect::<Vec<_>>();
if match component {
// A top-level component element can only be removed if it contains
// exactly one sub-element (without any condition or assignment)
// that can substitute the component element.
Some(_) => {
sub_elements.len() == 1
&& sub_elements.first().and_then(|n| {
n.as_node().unwrap().first_child_or_token().map(|n| n.kind())
}) == Some(SyntaxKind::Element)
}
// Any other element can be removed in favor of one or more sub-elements.
None => sub_elements.iter().any(|n| n.kind() == SyntaxKind::SubElement),
} {
let unindented_lines = sub_elements
.iter()
.map(|n| match n {
NodeOrToken::Node(n) => n
.text()
.to_string()
.lines()
.map(|line| line.strip_prefix(" ").unwrap_or(line).to_string())
.collect::<Vec<_>>()
.join("\n"),
NodeOrToken::Token(t) => {
t.text().strip_suffix(" ").unwrap_or(t.text()).to_string()
}
})
.collect::<Vec<String>>();
let edits = vec![TextEdit::new(
lsp_types::Range::new(r.start, r.end),
unindented_lines.concat(),
)];
result.push(CodeActionOrCommand::CodeAction(lsp_types::CodeAction {
title: "Remove element".into(),
kind: Some(lsp_types::CodeActionKind::REFACTOR),
edit: common::create_workspace_edit_from_path(
document_cache,
token.source_file.path(),
edits,
),
..Default::default()
}));
}
// We have already checked that the node is a qualified name of an element.
// Check whether the element is a direct sub-element of another element
// meaning that it can be repeated or made conditional.
if node // QualifiedName
.parent() // Element
.unwrap()
.parent()
.filter(|n| n.kind() == SyntaxKind::SubElement)
.and_then(|p| p.parent())
.is_some_and(|n| n.kind() == SyntaxKind::Element)
{
let edits = vec![TextEdit::new(
lsp_types::Range::new(r.start, r.start),
"for ${1:name}[index] in ${0:model} : ".to_string(),
)];
result.push(CodeActionOrCommand::CodeAction(lsp_types::CodeAction {
title: "Repeat element".into(),
kind: Some(lsp_types::CodeActionKind::REFACTOR),
edit: common::create_workspace_edit_from_path(
document_cache,
token.source_file.path(),
edits,
),
..Default::default()
}));
let edits = vec![TextEdit::new(
lsp_types::Range::new(r.start, r.start),
"if ${0:condition} : ".to_string(),
)];
result.push(CodeActionOrCommand::CodeAction(lsp_types::CodeAction {
title: "Make conditional".into(),
kind: Some(lsp_types::CodeActionKind::REFACTOR),
edit: common::create_workspace_edit_from_path(
document_cache,
token.source_file.path(),
edits,
),
..Default::default()
}));
}
}
}
(!result.is_empty()).then_some(result)
}
fn get_document_color(
document_cache: &mut DocumentCache,
text_document: &lsp_types::TextDocumentIdentifier,
) -> Option<Vec<ColorInformation>> {
let mut result = Vec::new();
let doc = document_cache.get_document(&text_document.uri)?;
let root_node = doc.node.as_ref()?;
let mut token = root_node.first_token()?;
loop {
if token.kind() == SyntaxKind::ColorLiteral {
(|| -> Option<()> {
let range = util::token_to_lsp_range(&token);
let col = i_slint_compiler::literals::parse_color_literal(token.text())?;
let shift = |s: u32| -> f32 { ((col >> s) & 0xff) as f32 / 255. };
result.push(ColorInformation {
range,
color: Color {
alpha: shift(24),
red: shift(16),
green: shift(8),
blue: shift(0),
},
});
Some(())
})();
}
token = match token.next_token() {
Some(token) => token,
None => break Some(result),
}
}
}
/// Retrieve the document outline
fn get_document_symbols(
document_cache: &mut DocumentCache,
text_document: &lsp_types::TextDocumentIdentifier,
) -> Option<DocumentSymbolResponse> {
let doc = document_cache.get_document(&text_document.uri)?;
// DocumentSymbol doesn't implement default and some field depends on features or are deprecated
let ds: DocumentSymbol = serde_json::from_value(
serde_json::json!({ "name" : "", "kind": 255, "range" : lsp_types::Range::default(), "selectionRange" : lsp_types::Range::default() })
)
.unwrap();
let inner_components = doc.inner_components.clone();
let inner_types = doc.inner_types.clone();
let mut r = inner_components
.iter()
.filter_map(|c| {
let root_element = c.root_element.borrow();
let element_node = &root_element.debug.first()?.node;
let component_node = syntax_nodes::Component::new(element_node.parent()?)?;
let selection_range = util::node_to_lsp_range(&component_node.DeclaredIdentifier());
if c.id.is_empty() {
// Symbols with empty names are invalid
return None;
}
Some(DocumentSymbol {
range: util::node_to_lsp_range(&component_node),
selection_range,
name: c.id.clone(),
kind: if c.is_global() {
lsp_types::SymbolKind::OBJECT
} else {
lsp_types::SymbolKind::CLASS
},
children: gen_children(&c.root_element, &ds),
..ds.clone()
})
})
.collect::<Vec<_>>();
r.extend(inner_types.iter().filter_map(|c| match c {
Type::Struct { name: Some(name), node: Some(node), .. } => Some(DocumentSymbol {
range: util::node_to_lsp_range(node.parent().as_ref()?),
selection_range: util::node_to_lsp_range(
&node.parent()?.child_node(SyntaxKind::DeclaredIdentifier)?,
),
name: name.clone(),
kind: lsp_types::SymbolKind::STRUCT,
..ds.clone()
}),
Type::Enumeration(enumeration) => enumeration.node.as_ref().map(|node| DocumentSymbol {
range: util::node_to_lsp_range(node),
selection_range: util::node_to_lsp_range(&node.DeclaredIdentifier()),
name: enumeration.name.clone(),
kind: lsp_types::SymbolKind::ENUM,
..ds.clone()
}),
_ => None,
}));
fn gen_children(elem: &ElementRc, ds: &DocumentSymbol) -> Option<Vec<DocumentSymbol>> {
let r = elem
.borrow()
.children
.iter()
.filter_map(|child| {
let e = child.borrow();
let element_node = &e.debug.first()?.node;
let sub_element_node = element_node.parent()?;
debug_assert_eq!(sub_element_node.kind(), SyntaxKind::SubElement);
Some(DocumentSymbol {
range: util::node_to_lsp_range(&sub_element_node),
selection_range: util::node_to_lsp_range(
element_node.QualifiedName().as_ref()?,
),
name: e.base_type.to_string(),
detail: (!e.id.is_empty()).then(|| e.id.clone()),
kind: lsp_types::SymbolKind::VARIABLE,
children: gen_children(child, ds),
..ds.clone()
})
})
.collect::<Vec<_>>();
(!r.is_empty()).then_some(r)
}
r.sort_by(|a, b| a.range.start.cmp(&b.range.start));
Some(r.into())
}
fn get_code_lenses(
document_cache: &mut DocumentCache,
text_document: &lsp_types::TextDocumentIdentifier,
) -> Option<Vec<CodeLens>> {
if cfg!(any(feature = "preview-builtin", feature = "preview-external")) {
let doc = document_cache.get_document(&text_document.uri)?;
let inner_components = doc.inner_components.clone();
let mut r = vec![];
// Handle preview lens
r.extend(inner_components.iter().filter(|c| !c.is_global()).filter_map(|c| {
Some(CodeLens {
range: util::node_to_lsp_range(&c.root_element.borrow().debug.first()?.node),
command: Some(create_show_preview_command(true, &text_document.uri, c.id.as_str())),
data: None,
})
}));
Some(r)
} else {
None
}
}
/// If the token is matching a Element ID, return the list of all element id in the same component