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Fix EOL handling in web editor (#27141)

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Fixes https://github.com/go-gitea/gitea/issues/27136.

This does the following for Monaco's EOL setting:

1. Use editorconfig setting if present
2. Use the file's dominant line ending as detected by monaco, which uses
LF for empty file
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silverwind 2023-09-24 21:51:02 +02:00 • committed by GitHub
parent 8e23524b18
commit 3a187eace5
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3 changed files with 22 additions and 6 deletions
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19
web_src/js/features/codeeditor.js
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@ -62,7 +62,7 @@ export async function createMonaco(textarea, filename, editorOpts) {
const monaco = await import(/* webpackChunkName: "monaco" */'monaco-editor');
initLanguages(monaco);
let {language, ...other} = editorOpts;
let {language, eol, ...other} = editorOpts;
if (!language) language = getLanguage(filename);
const container = document.createElement('div');
@ -105,14 +105,28 @@ export async function createMonaco(textarea, filename, editorOpts) {
monaco.languages.register({id: 'vs.editor.nullLanguage'});
monaco.languages.setLanguageConfiguration('vs.editor.nullLanguage', {});
// We encode the initial value in JSON on the backend to prevent browsers from
// discarding the \r during HTML parsing:
// https://html.spec.whatwg.org/multipage/parsing.html#preprocessing-the-input-stream
const value = JSON.parse(textarea.getAttribute('data-initial-value') || '""');
textarea.value = value;
textarea.removeAttribute('data-initial-value');
const editor = monaco.editor.create(container, {
value: textarea.value,
value,
theme: 'gitea',
language,
...other,
});
const model = editor.getModel();
// Monaco performs auto-detection of dominant EOL in the file, biased towards LF for
// empty files. If there is an editorconfig value, override this detected value.
if (eol in monaco.editor.EndOfLineSequence) {
model.setEOL(monaco.editor.EndOfLineSequence[eol]);
}
model.onDidChangeContent(() => {
textarea.value = editor.getValue();
textarea.dispatchEvent(new Event('change')); // seems to be needed for jquery-are-you-sure
@ -187,5 +201,6 @@ function getEditorConfigOptions(ec) {
opts.trimAutoWhitespace = ec.trim_trailing_whitespace === true;
opts.insertSpaces = ec.indent_style === 'space';
opts.useTabStops = ec.indent_style === 'tab';
opts.eol = ec.end_of_line?.toUpperCase();
return opts;
}