Merge #3388

3388: Remove inlay hint in diff views r=matklad a=vbfox

If the left side of a diff view that contain the old version of the file apply inlays they are misplaced and produce a weird display:

![image](https://user-images.githubusercontent.com/131878/75628802-b1ac1900-5bdc-11ea-8c26-6722d8e38371.png)

After the change:

![image](https://user-images.githubusercontent.com/131878/75628831-e91ac580-5bdc-11ea-9039-c6b4ffbdb2be.png)

The detection is done by blacklisting the url schemes used by git and subversion scm extensions, whitelisting `file` is also possible but neither is perfect as VSCode now support both pluggable scm extensions and pluggable remote filesystems. But I suspect that the list of scm extensions is more easily manageable.

**Note**: I can rebase on #3378 if needed as it touches the same lines of code

Co-authored-by: Julien Roncaglia <[email protected]>

1 files changed, 3 insertions, 2 deletions

diff --git a/editors/code/src/commands/syntax_tree.ts b/editors/code/src/commands/syntax_tree.ts
index 7218bfb90..2e08e8f11 100644
--- a/editors/code/src/commands/syntax_tree.ts
+++ b/editors/code/src/commands/syntax_tree.ts
@@ -2,6 +2,7 @@ import * as vscode from 'vscode';
 import * as ra from '../rust-analyzer-api';
 
 import { Ctx, Cmd } from '../ctx';
+import { isRustDocument } from '../util';
 
 // Opens the virtual file that will show the syntax tree
 //
@@ -19,7 +20,7 @@ export function syntaxTree(ctx: Ctx): Cmd {
     vscode.workspace.onDidChangeTextDocument(
         (event: vscode.TextDocumentChangeEvent) => {
             const doc = event.document;
-            if (doc.languageId !== 'rust') return;
+            if (!isRustDocument(doc)) return;
             afterLs(() => tdcp.eventEmitter.fire(tdcp.uri));
         },
         null,
@@ -28,7 +29,7 @@ export function syntaxTree(ctx: Ctx): Cmd {
 
     vscode.window.onDidChangeActiveTextEditor(
         (editor: vscode.TextEditor | undefined) => {
-            if (!editor || editor.document.languageId !== 'rust') return;
+            if (!editor || !isRustDocument(editor.document)) return;
             tdcp.eventEmitter.fire(tdcp.uri);
         },
         null,