Remove the old syntax tree viewer

4 files changed, 0 insertions, 322 deletions

diff --git a/src/tools/rust-analyzer/editors/code/package.json b/src/tools/rust-analyzer/editors/code/package.json
index bbfe9c2a5ce..6deb5bfd775 100644
--- a/src/tools/rust-analyzer/editors/code/package.json
+++ b/src/tools/rust-analyzer/editors/code/package.json
@@ -109,11 +109,6 @@
         ],
         "commands": [
             {
-                "command": "rust-analyzer.syntaxTree",
-                "title": "Show Syntax Tree",
-                "category": "rust-analyzer (debug command)"
-            },
-            {
                 "command": "rust-analyzer.viewHir",
                 "title": "View Hir",
                 "category": "rust-analyzer (debug command)"
@@ -2969,17 +2964,6 @@
                 "pattern": "$rustc"
             }
         ],
-        "colors": [
-            {
-                "id": "rust_analyzer.syntaxTreeBorder",
-                "description": "Color of the border displayed in the Rust source code for the selected syntax node (see \"Show Syntax Tree\" command)",
-                "defaults": {
-                    "dark": "#ffffff",
-                    "light": "#b700ff",
-                    "highContrast": "#b700ff"
-                }
-            }
-        ],
         "semanticTokenTypes": [
             {
                 "id": "angle",
@@ -3300,10 +3284,6 @@
         "menus": {
             "commandPalette": [
                 {
-                    "command": "rust-analyzer.syntaxTree",
-                    "when": "inRustProject"
-                },
-                {
                     "command": "rust-analyzer.viewHir",
                     "when": "inRustProject"
                 },
diff --git a/src/tools/rust-analyzer/editors/code/src/ast_inspector.ts b/src/tools/rust-analyzer/editors/code/src/ast_inspector.ts
deleted file mode 100644
index 35b705c477e..00000000000
--- a/src/tools/rust-analyzer/editors/code/src/ast_inspector.ts
+++ /dev/null
@@ -1,216 +0,0 @@
-import * as vscode from "vscode";
-
-import type { Ctx, Disposable } from "./ctx";
-import { type RustEditor, isRustEditor, unwrapUndefinable } from "./util";
-
-// FIXME: consider implementing this via the Tree View API?
-// https://code.visualstudio.com/api/extension-guides/tree-view
-export class AstInspector implements vscode.HoverProvider, vscode.DefinitionProvider, Disposable {
-    private readonly astDecorationType = vscode.window.createTextEditorDecorationType({
-        borderColor: new vscode.ThemeColor("rust_analyzer.syntaxTreeBorder"),
-        borderStyle: "solid",
-        borderWidth: "2px",
-    });
-    private rustEditor: undefined | RustEditor;
-
-    // Lazy rust token range -> syntax tree file range.
-    private readonly rust2Ast = new Lazy(() => {
-        const astEditor = this.findAstTextEditor();
-        if (!this.rustEditor || !astEditor) return undefined;
-
-        const buf: [vscode.Range, vscode.Range][] = [];
-        for (let i = 0; i < astEditor.document.lineCount; ++i) {
-            const astLine = astEditor.document.lineAt(i);
-
-            // Heuristically look for nodes with quoted text (which are token nodes)
-            const isTokenNode = astLine.text.lastIndexOf('"') >= 0;
-            if (!isTokenNode) continue;
-
-            const rustRange = this.parseRustTextRange(this.rustEditor.document, astLine.text);
-            if (!rustRange) continue;
-
-            buf.push([rustRange, this.findAstNodeRange(astLine)]);
-        }
-        return buf;
-    });
-
-    constructor(ctx: Ctx) {
-        ctx.pushExtCleanup(
-            vscode.languages.registerHoverProvider({ scheme: "rust-analyzer" }, this),
-        );
-        ctx.pushExtCleanup(vscode.languages.registerDefinitionProvider({ language: "rust" }, this));
-        vscode.workspace.onDidCloseTextDocument(
-            this.onDidCloseTextDocument,
-            this,
-            ctx.subscriptions,
-        );
-        vscode.workspace.onDidChangeTextDocument(
-            this.onDidChangeTextDocument,
-            this,
-            ctx.subscriptions,
-        );
-        vscode.window.onDidChangeVisibleTextEditors(
-            this.onDidChangeVisibleTextEditors,
-            this,
-            ctx.subscriptions,
-        );
-    }
-    dispose() {
-        this.setRustEditor(undefined);
-    }
-
-    private onDidChangeTextDocument(event: vscode.TextDocumentChangeEvent) {
-        if (
-            this.rustEditor &&
-            event.document.uri.toString() === this.rustEditor.document.uri.toString()
-        ) {
-            this.rust2Ast.reset();
-        }
-    }
-
-    private onDidCloseTextDocument(doc: vscode.TextDocument) {
-        if (this.rustEditor && doc.uri.toString() === this.rustEditor.document.uri.toString()) {
-            this.setRustEditor(undefined);
-        }
-    }
-
-    private onDidChangeVisibleTextEditors(editors: readonly vscode.TextEditor[]) {
-        if (!this.findAstTextEditor()) {
-            this.setRustEditor(undefined);
-            return;
-        }
-        this.setRustEditor(editors.find(isRustEditor));
-    }
-
-    private findAstTextEditor(): undefined | vscode.TextEditor {
-        return vscode.window.visibleTextEditors.find(
-            (it) => it.document.uri.scheme === "rust-analyzer",
-        );
-    }
-
-    private setRustEditor(newRustEditor: undefined | RustEditor) {
-        if (this.rustEditor && this.rustEditor !== newRustEditor) {
-            this.rustEditor.setDecorations(this.astDecorationType, []);
-            this.rust2Ast.reset();
-        }
-        this.rustEditor = newRustEditor;
-    }
-
-    // additional positional params are omitted
-    provideDefinition(
-        doc: vscode.TextDocument,
-        pos: vscode.Position,
-    ): vscode.ProviderResult<vscode.DefinitionLink[]> {
-        if (!this.rustEditor || doc.uri.toString() !== this.rustEditor.document.uri.toString()) {
-            return;
-        }
-
-        const astEditor = this.findAstTextEditor();
-        if (!astEditor) return;
-
-        const rust2AstRanges = this.rust2Ast
-            .get()
-            ?.find(([rustRange, _]) => rustRange.contains(pos));
-        if (!rust2AstRanges) return;
-
-        const [rustFileRange, astFileRange] = rust2AstRanges;
-
-        astEditor.revealRange(astFileRange);
-        astEditor.selection = new vscode.Selection(astFileRange.start, astFileRange.end);
-
-        return [
-            {
-                targetRange: astFileRange,
-                targetUri: astEditor.document.uri,
-                originSelectionRange: rustFileRange,
-                targetSelectionRange: astFileRange,
-            },
-        ];
-    }
-
-    // additional positional params are omitted
-    provideHover(
-        doc: vscode.TextDocument,
-        hoverPosition: vscode.Position,
-    ): vscode.ProviderResult<vscode.Hover> {
-        if (!this.rustEditor) return;
-
-        const astFileLine = doc.lineAt(hoverPosition.line);
-
-        const rustFileRange = this.parseRustTextRange(this.rustEditor.document, astFileLine.text);
-        if (!rustFileRange) return;
-
-        this.rustEditor.setDecorations(this.astDecorationType, [rustFileRange]);
-        this.rustEditor.revealRange(rustFileRange);
-
-        const rustSourceCode = this.rustEditor.document.getText(rustFileRange);
-        const astFileRange = this.findAstNodeRange(astFileLine);
-
-        return new vscode.Hover(["```rust\n" + rustSourceCode + "\n```"], astFileRange);
-    }
-
-    private findAstNodeRange(astLine: vscode.TextLine): vscode.Range {
-        const lineOffset = astLine.range.start;
-        const begin = lineOffset.translate(undefined, astLine.firstNonWhitespaceCharacterIndex);
-        const end = lineOffset.translate(undefined, astLine.text.trimEnd().length);
-        return new vscode.Range(begin, end);
-    }
-
-    private parseRustTextRange(
-        doc: vscode.TextDocument,
-        astLine: string,
-    ): undefined | vscode.Range {
-        const parsedRange = /(\d+)\.\.(\d+)/.exec(astLine);
-        if (!parsedRange) return;
-
-        const [begin, end] = parsedRange.slice(1).map((off) => this.positionAt(doc, +off));
-        const actualBegin = unwrapUndefinable(begin);
-        const actualEnd = unwrapUndefinable(end);
-        return new vscode.Range(actualBegin, actualEnd);
-    }
-
-    // Memoize the last value, otherwise the CPU is at 100% single core
-    // with quadratic lookups when we build rust2Ast cache
-    cache?: { doc: vscode.TextDocument; offset: number; line: number };
-
-    positionAt(doc: vscode.TextDocument, targetOffset: number): vscode.Position {
-        if (doc.eol === vscode.EndOfLine.LF) {
-            return doc.positionAt(targetOffset);
-        }
-
-        // Dirty workaround for crlf line endings
-        // We are still in this prehistoric era of carriage returns here...
-
-        let line = 0;
-        let offset = 0;
-
-        const cache = this.cache;
-        if (cache?.doc === doc && cache.offset <= targetOffset) {
-            ({ line, offset } = cache);
-        }
-
-        while (true) {
-            const lineLenWithLf = doc.lineAt(line).text.length + 1;
-            if (offset + lineLenWithLf > targetOffset) {
-                this.cache = { doc, offset, line };
-                return doc.positionAt(targetOffset + line);
-            }
-            offset += lineLenWithLf;
-            line += 1;
-        }
-    }
-}
-
-class Lazy<T> {
-    val: undefined | T;
-
-    constructor(private readonly compute: () => undefined | T) {}
-
-    get() {
-        return this.val ?? (this.val = this.compute());
-    }
-
-    reset() {
-        this.val = undefined;
-    }
-}
diff --git a/src/tools/rust-analyzer/editors/code/src/commands.ts b/src/tools/rust-analyzer/editors/code/src/commands.ts
index a78696e1863..f94c57eee88 100644
--- a/src/tools/rust-analyzer/editors/code/src/commands.ts
+++ b/src/tools/rust-analyzer/editors/code/src/commands.ts
@@ -15,7 +15,6 @@ import {
     createTaskFromRunnable,
     createCargoArgs,
 } from "./run";
-import { AstInspector } from "./ast_inspector";
 import {
     isRustDocument,
     isCargoRunnableArgs,
@@ -33,7 +32,6 @@ import type { DependencyId } from "./dependencies_provider";
 import { log } from "./util";
 import type { SyntaxElement } from "./syntax_tree_provider";
 
-export * from "./ast_inspector";
 export * from "./run";
 
 export function analyzerStatus(ctx: CtxInit): Cmd {
@@ -459,89 +457,6 @@ export function serverVersion(ctx: CtxInit): Cmd {
     };
 }
 
-// Opens the virtual file that will show the syntax tree
-//
-// The contents of the file come from the `TextDocumentContentProvider`
-export function syntaxTree(ctx: CtxInit): Cmd {
-    const tdcp = new (class implements vscode.TextDocumentContentProvider {
-        readonly uri = vscode.Uri.parse("rust-analyzer-syntax-tree://syntaxtree/tree.rast");
-        readonly eventEmitter = new vscode.EventEmitter<vscode.Uri>();
-        constructor() {
-            vscode.workspace.onDidChangeTextDocument(
-                this.onDidChangeTextDocument,
-                this,
-                ctx.subscriptions,
-            );
-            vscode.window.onDidChangeActiveTextEditor(
-                this.onDidChangeActiveTextEditor,
-                this,
-                ctx.subscriptions,
-            );
-        }
-
-        private onDidChangeTextDocument(event: vscode.TextDocumentChangeEvent) {
-            if (isRustDocument(event.document)) {
-                // We need to order this after language server updates, but there's no API for that.
-                // Hence, good old sleep().
-                void sleep(10).then(() => this.eventEmitter.fire(this.uri));
-            }
-        }
-        private onDidChangeActiveTextEditor(editor: vscode.TextEditor | undefined) {
-            if (editor && isRustEditor(editor)) {
-                this.eventEmitter.fire(this.uri);
-            }
-        }
-
-        async provideTextDocumentContent(
-            uri: vscode.Uri,
-            ct: vscode.CancellationToken,
-        ): Promise<string> {
-            const rustEditor = ctx.activeRustEditor;
-            if (!rustEditor) return "";
-            const client = ctx.client;
-
-            // When the range based query is enabled we take the range of the selection
-            const range =
-                uri.query === "range=true" && !rustEditor.selection.isEmpty
-                    ? client.code2ProtocolConverter.asRange(rustEditor.selection)
-                    : null;
-
-            const params = { textDocument: { uri: rustEditor.document.uri.toString() }, range };
-            return client.sendRequest(ra.syntaxTree, params, ct);
-        }
-
-        get onDidChange(): vscode.Event<vscode.Uri> {
-            return this.eventEmitter.event;
-        }
-    })();
-
-    ctx.pushExtCleanup(new AstInspector(ctx));
-    ctx.pushExtCleanup(
-        vscode.workspace.registerTextDocumentContentProvider("rust-analyzer-syntax-tree", tdcp),
-    );
-    ctx.pushExtCleanup(
-        vscode.languages.setLanguageConfiguration("ra_syntax_tree", {
-            brackets: [["[", ")"]],
-        }),
-    );
-
-    return async () => {
-        const editor = vscode.window.activeTextEditor;
-        const rangeEnabled = !!editor && !editor.selection.isEmpty;
-
-        const uri = rangeEnabled ? vscode.Uri.parse(`${tdcp.uri.toString()}?range=true`) : tdcp.uri;
-
-        const document = await vscode.workspace.openTextDocument(uri);
-
-        tdcp.eventEmitter.fire(uri);
-
-        void (await vscode.window.showTextDocument(document, {
-            viewColumn: vscode.ViewColumn.Two,
-            preserveFocus: true,
-        }));
-    };
-}
-
 function viewHirOrMir(ctx: CtxInit, xir: "hir" | "mir"): Cmd {
     const viewXir = xir === "hir" ? "viewHir" : "viewMir";
     const requestType = xir === "hir" ? ra.viewHir : ra.viewMir;
diff --git a/src/tools/rust-analyzer/editors/code/src/main.ts b/src/tools/rust-analyzer/editors/code/src/main.ts
index 989f66050ce..59c131cb376 100644
--- a/src/tools/rust-analyzer/editors/code/src/main.ts
+++ b/src/tools/rust-analyzer/editors/code/src/main.ts
@@ -158,7 +158,6 @@ function createCommands(): Record<string, CommandFactory> {
         matchingBrace: { enabled: commands.matchingBrace },
         joinLines: { enabled: commands.joinLines },
         parentModule: { enabled: commands.parentModule },
-        syntaxTree: { enabled: commands.syntaxTree },
         viewHir: { enabled: commands.viewHir },
         viewMir: { enabled: commands.viewMir },
         interpretFunction: { enabled: commands.interpretFunction },