Basic html highlighting + lsp support

Cargo.lock

@@ -6043,6 +6043,16 @@ dependencies = [
  "tree-sitter",
 ]
 
+[[package]]
+name = "tree-sitter-html"
+version = "0.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "184e6b77953a354303dc87bf5fe36558c83569ce92606e7b382a0dc1b7443443"
+dependencies = [
+ "cc",
+ "tree-sitter",
+]
+
 [[package]]
 name = "tree-sitter-json"
 version = "0.19.0"
@@ -7229,6 +7239,7 @@ dependencies = [
  "tree-sitter-cpp",
  "tree-sitter-elixir",
  "tree-sitter-go",
+ "tree-sitter-html",
  "tree-sitter-json 0.20.0",
  "tree-sitter-markdown",
  "tree-sitter-python",

crates/zed/Cargo.toml

@@ -100,6 +100,7 @@ tree-sitter-markdown = { git = "https://github.com/MDeiml/tree-sitter-markdown",
 tree-sitter-python = "0.20.2"
 tree-sitter-toml = { git = "https://github.com/tree-sitter/tree-sitter-toml", rev = "342d9be207c2dba869b9967124c679b5e6fd0ebe" }
 tree-sitter-typescript = "0.20.1"
+tree-sitter-html = "0.19.0"
 url = "2.2"
 
 [dev-dependencies]

crates/zed/src/languages.rs

@@ -7,6 +7,7 @@ use std::{borrow::Cow, str, sync::Arc};
 mod c;
 mod elixir;
 mod go;
+mod html;
 mod installation;
 mod json;
 mod language_plugin;
@@ -96,6 +97,11 @@ pub async fn init(languages: Arc<LanguageRegistry>, _executor: Arc<Background>)
             tree_sitter_typescript::language_tsx(),
             Some(CachedLspAdapter::new(typescript::TypeScriptLspAdapter).await),
         ),
+        (
+            "html",
+            tree_sitter_html::language(),
+            Some(CachedLspAdapter::new(html::HtmlLspAdapter).await),
+        ),
     ] {
         languages.add(Arc::new(language(name, grammar, lsp_adapter)));
     }

crates/zed/src/languages/html.rs

@@ -0,0 +1,101 @@
+use super::installation::{npm_install_packages, npm_package_latest_version};
+use anyhow::{anyhow, Context, Result};
+use async_trait::async_trait;
+use client::http::HttpClient;
+use futures::StreamExt;
+use language::{LanguageServerName, LspAdapter};
+use serde_json::json;
+use smol::fs;
+use std::{any::Any, path::PathBuf, sync::Arc};
+use util::ResultExt;
+
+pub struct HtmlLspAdapter;
+
+impl HtmlLspAdapter {
+    const BIN_PATH: &'static str =
+        "node_modules/vscode-langservers-extracted/bin/vscode-html-language-server";
+}
+
+#[async_trait]
+impl LspAdapter for HtmlLspAdapter {
+    async fn name(&self) -> LanguageServerName {
+        LanguageServerName("vscode-html-language-server".into())
+    }
+
+    async fn server_args(&self) -> Vec<String> {
+        vec!["--stdio".into()]
+    }
+
+    async fn fetch_latest_server_version(
+        &self,
+        _: Arc<dyn HttpClient>,
+    ) -> Result<Box<dyn 'static + Any + Send>> {
+        Ok(Box::new(npm_package_latest_version("vscode-langservers-extracted").await?) as Box<_>)
+    }
+
+    async fn fetch_server_binary(
+        &self,
+        version: Box<dyn 'static + Send + Any>,
+        _: Arc<dyn HttpClient>,
+        container_dir: PathBuf,
+    ) -> Result<PathBuf> {
+        let version = version.downcast::<String>().unwrap();
+        let version_dir = container_dir.join(version.as_str());
+        fs::create_dir_all(&version_dir)
+            .await
+            .context("failed to create version directory")?;
+        let binary_path = version_dir.join(Self::BIN_PATH);
+
+        if fs::metadata(&binary_path).await.is_err() {
+            npm_install_packages(
+                [("vscode-langservers-extracted", version.as_str())],
+                &version_dir,
+            )
+            .await?;
+
+            if let Some(mut entries) = fs::read_dir(&container_dir).await.log_err() {
+                while let Some(entry) = entries.next().await {
+                    if let Some(entry) = entry.log_err() {
+                        let entry_path = entry.path();
+                        if entry_path.as_path() != version_dir {
+                            fs::remove_dir_all(&entry_path).await.log_err();
+                        }
+                    }
+                }
+            }
+        }
+
+        Ok(binary_path)
+    }
+
+    async fn cached_server_binary(&self, container_dir: PathBuf) -> Option<PathBuf> {
+        (|| async move {
+            let mut last_version_dir = None;
+            let mut entries = fs::read_dir(&container_dir).await?;
+            while let Some(entry) = entries.next().await {
+                let entry = entry?;
+                if entry.file_type().await?.is_dir() {
+                    last_version_dir = Some(entry.path());
+                }
+            }
+            let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
+            let bin_path = last_version_dir.join(Self::BIN_PATH);
+            if bin_path.exists() {
+                Ok(bin_path)
+            } else {
+                Err(anyhow!(
+                    "missing executable in directory {:?}",
+                    last_version_dir
+                ))
+            }
+        })()
+        .await
+        .log_err()
+    }
+
+    async fn initialization_options(&self) -> Option<serde_json::Value> {
+        Some(json!({
+            "provideFormatter": true
+        }))
+    }
+}

crates/zed/src/languages/html/brackets.scm

@@ -0,0 +1,2 @@
+("<" @open ">" @close)
+("\"" @open "\"" @close)

crates/zed/src/languages/html/config.toml

@@ -0,0 +1,10 @@
+name = "HTML"
+path_suffixes = ["html"]
+autoclose_before = ">"
+brackets = [
+    { start = "<", end = ">", close = true, newline = true },
+    { start = "{", end = "}", close = true, newline = true },
+    { start = "(", end = ")", close = true, newline = true },
+    { start = "\"", end = "\"", close = true, newline = false },
+    { start = "!--", end = " --", close = true, newline = false },
+]

crates/zed/src/languages/html/highlights.scm

@@ -0,0 +1,11 @@
+(tag_name) @keyword
+(doctype) @constant
+(attribute_name) @property
+(attribute_value) @string
+(comment) @comment
+
+[
+  "<"
+  ">"
+  "</"
+] @punctuation.bracket

crates/zed/src/languages/html/indents.scm

@@ -0,0 +1 @@
+(tag_name) @indent