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Improve code editor text selection and clean up lint enablement (#37474)

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1. Make the content area stretch the box, enabling text selection to
start over empty space.
2. Disable linter for markdown, it can never produce lint errors, this
hides the unnecessary lint gutter on markdown files.
3. Verified all languages linter enablement, all accurate.
4. Refactor `getLinterExtension` to not rely on file extensions.
5. Include jsonc/json5 extensions in regex.

---
This PR was written with the help of Claude Opus 4.7

---------

Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>
Co-authored-by: Nicolas <bircni@icloud.com>
This commit is contained in:
silverwind
2026-05-01 19:41:31 +02:00
committed by GitHub
parent deb31d3f30
commit 31cee60cc7
2 changed files with 22 additions and 17 deletions
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19
web_src/js/modules/codeeditor/main.ts
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@@ -7,7 +7,7 @@ import type {PaletteCommand} from './command-palette.ts';
import {contextMenu, collectSymbols, selectAllOccurrences} from './context-menu.ts';
import {createJsonLinter, createSyntaxErrorLinter} from './linter.ts';
import {clickableUrls, goToDefinitionAt, trimTrailingWhitespaceFromView} from './utils.ts';
import type {LanguageDescription} from '@codemirror/language';
import type {LanguageDescription, LanguageSupport} from '@codemirror/language';
import type {Compartment, Extension} from '@codemirror/state';
import type {EditorView, ViewUpdate} from '@codemirror/view';
@@ -295,16 +295,19 @@ export async function createCodeEditor(textarea: HTMLTextAreaElement, filenameIn
return editor;
}
// files that are JSONC despite having a .json extension
const jsoncFilesRegex = /^([jt]sconfig.*|devcontainer)\.json$/;
// files that the JSON parser is too strict for (comments, trailing commas)
const jsoncFilesRegex = /^([jt]sconfig.*|devcontainer)\.json$|\.(jsonc|json5)$/i;
async function getLinterExtension(cm: CodemirrorModules, filename: string, loadedLang: {language: unknown} | null): Promise<Extension> {
const ext = extname(filename).toLowerCase();
if (ext === '.json' || ext === '.map') {
async function getLinterExtension(cm: CodemirrorModules, filename: string, loadedLang: LanguageSupport | null): Promise<Extension> {
if (!loadedLang) return [];
const lang = loadedLang.language;
// StreamLanguage (legacy modes) don't produce Lezer error nodes
if (lang instanceof cm.language.StreamLanguage) return [];
if (lang.name === 'json') {
return jsoncFilesRegex.test(filename) ? [] : [cm.lint.lintGutter(), await createJsonLinter(cm)];
}
// StreamLanguage (legacy modes) don't produce Lezer error nodes
if (!loadedLang || loadedLang.language instanceof cm.language.StreamLanguage) return [];
// markdown's parser emits no error nodes, and nested code-fence overlays aren't traversed
if (lang.name === 'markdown') return [];
return [cm.lint.lintGutter(), createSyntaxErrorLinter(cm)];
}