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import tinycolor from 'tinycolor2';
import {basename, extname, isObject, isDarkTheme} from '../utils.ts';
import {onInputDebounce} from '../utils/dom.ts';
import type MonacoNamespace from 'monaco-editor';
type Monaco = typeof MonacoNamespace;
type IStandaloneCodeEditor = MonacoNamespace.editor.IStandaloneCodeEditor;
type IEditorOptions = MonacoNamespace.editor.IEditorOptions;
type IGlobalEditorOptions = MonacoNamespace.editor.IGlobalEditorOptions;
type ITextModelUpdateOptions = MonacoNamespace.editor.ITextModelUpdateOptions;
type MonacoOpts = IEditorOptions & IGlobalEditorOptions & ITextModelUpdateOptions;
type EditorConfig = {
indent_style?: 'tab' | 'space',
indent_size?: string | number, // backend emits this as string
tab_width?: string | number, // backend emits this as string
end_of_line?: 'lf' | 'cr' | 'crlf',
charset?: 'latin1' | 'utf-8' | 'utf-8-bom' | 'utf-16be' | 'utf-16le',
trim_trailing_whitespace?: boolean,
insert_final_newline?: boolean,
root?: boolean,
}
const languagesByFilename: Record<string, string> = {};
const languagesByExt: Record<string, string> = {};
const baseOptions: MonacoOpts = {
fontFamily: 'var(--fonts-monospace)',
fontSize: 14, // https://github.com/microsoft/monaco-editor/issues/2242
guides: {bracketPairs: false, indentation: false},
links: false,
minimap: {enabled: false},
occurrencesHighlight: 'off',
overviewRulerLanes: 0,
renderLineHighlight: 'all',
renderLineHighlightOnlyWhenFocus: true,
rulers: [],
scrollbar: {horizontalScrollbarSize: 6, verticalScrollbarSize: 6},
scrollBeyondLastLine: false,
automaticLayout: true,
};
function getEditorconfig(input: HTMLInputElement): EditorConfig | null {
const json = input.getAttribute('data-editorconfig');
if (!json) return null;
try {
return JSON.parse(json);
} catch {
return null;
}
}
function initLanguages(monaco: Monaco): void {
for (const {filenames, extensions, id} of monaco.languages.getLanguages()) {
for (const filename of filenames || []) {
languagesByFilename[filename] = id;
}
for (const extension of extensions || []) {
languagesByExt[extension] = id;
}
if (id === 'typescript') {
monaco.languages.typescript.typescriptDefaults.setCompilerOptions({
// this is needed to suppress error annotations in tsx regarding missing --jsx flag.
jsx: monaco.languages.typescript.JsxEmit.Preserve,
});
}
}
}
function getLanguage(filename: string): string {
return languagesByFilename[filename] || languagesByExt[extname(filename)] || 'plaintext';
}
function updateEditor(monaco: Monaco, editor: IStandaloneCodeEditor, filename: string, lineWrapExts: string[]): void {
editor.updateOptions(getFileBasedOptions(filename, lineWrapExts));
const model = editor.getModel();
if (!model) return;
const language = model.getLanguageId();
const newLanguage = getLanguage(filename);
if (language !== newLanguage) monaco.editor.setModelLanguage(model, newLanguage);
// TODO: Need to update the model uri with the new filename, but there is no easy way currently, see
// https://github.com/microsoft/monaco-editor/discussions/3751
}
// export editor for customization - https://github.com/go-gitea/gitea/issues/10409
function exportEditor(editor: IStandaloneCodeEditor): void {
if (!window.codeEditors) window.codeEditors = [];
if (!window.codeEditors.includes(editor)) window.codeEditors.push(editor);
}
function updateTheme(monaco: Monaco): void {
// https://github.com/microsoft/monaco-editor/issues/2427
// also, monaco can only parse 6-digit hex colors, so we convert the colors to that format
const styles = window.getComputedStyle(document.documentElement);
const getColor = (name: string) => tinycolor(styles.getPropertyValue(name).trim()).toString('hex6');
monaco.editor.defineTheme('gitea', {
base: isDarkTheme() ? 'vs-dark' : 'vs',
inherit: true,
rules: [
{
background: getColor('--color-code-bg'),
token: '',
},
],
colors: {
'editor.background': getColor('--color-code-bg'),
'editor.foreground': getColor('--color-text'),
'editor.inactiveSelectionBackground': getColor('--color-primary-light-4'),
'editor.lineHighlightBackground': getColor('--color-editor-line-highlight'),
'editor.selectionBackground': getColor('--color-primary-light-3'),
'editor.selectionForeground': getColor('--color-primary-light-3'),
'editorLineNumber.background': getColor('--color-code-bg'),
'editorLineNumber.foreground': getColor('--color-secondary-dark-6'),
'editorWidget.background': getColor('--color-body'),
'editorWidget.border': getColor('--color-secondary'),
'input.background': getColor('--color-input-background'),
'input.border': getColor('--color-input-border'),
'input.foreground': getColor('--color-input-text'),
'scrollbar.shadow': getColor('--color-shadow-opaque'),
'progressBar.background': getColor('--color-primary'),
'focusBorder': '#0000', // prevent blue border
},
});
}
type CreateMonacoOpts = MonacoOpts & {language?: string};
export async function createMonaco(textarea: HTMLTextAreaElement, filename: string, opts: CreateMonacoOpts): Promise<{monaco: Monaco, editor: IStandaloneCodeEditor}> {
const monaco = await import(/* webpackChunkName: "monaco" */'monaco-editor');
initLanguages(monaco);
let {language, ...other} = opts;
if (!language) language = getLanguage(filename);
const container = document.createElement('div');
container.className = 'monaco-editor-container';
if (!textarea.parentNode) throw new Error('Parent node absent');
textarea.parentNode.append(container);
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
updateTheme(monaco);
});
updateTheme(monaco);
const model = monaco.editor.createModel(textarea.value, language, monaco.Uri.file(filename));
const editor = monaco.editor.create(container, {
model,
theme: 'gitea',
...other,
});
monaco.editor.addKeybindingRules([
{keybinding: monaco.KeyCode.Enter, command: null}, // disable enter from accepting code completion
]);
model.onDidChangeContent(() => {
textarea.value = editor.getValue({
preserveBOM: true,
lineEnding: '',
});
textarea.dispatchEvent(new Event('change')); // seems to be needed for jquery-are-you-sure
});
exportEditor(editor);
const loading = document.querySelector('.editor-loading');
if (loading) loading.remove();
return {monaco, editor};
}
function getFileBasedOptions(filename: string, lineWrapExts: string[]): MonacoOpts {
return {
wordWrap: (lineWrapExts || []).includes(extname(filename)) ? 'on' : 'off',
};
}
function togglePreviewDisplay(previewable: boolean): void {
const previewTab = document.querySelector<HTMLElement>('a[data-tab="preview"]');
if (!previewTab) return;
if (previewable) {
previewTab.style.display = '';
} else {
previewTab.style.display = 'none';
// If the "preview" tab was active, user changes the filename to a non-previewable one,
// then the "preview" tab becomes inactive (hidden), so the "write" tab should become active
if (previewTab.classList.contains('active')) {
const writeTab = document.querySelector<HTMLElement>('a[data-tab="write"]');
writeTab?.click();
}
}
}
export async function createCodeEditor(textarea: HTMLTextAreaElement, filenameInput: HTMLInputElement): Promise<IStandaloneCodeEditor> {
const filename = basename(filenameInput.value);
const previewableExts = new Set((textarea.getAttribute('data-previewable-extensions') || '').split(','));
const lineWrapExts = (textarea.getAttribute('data-line-wrap-extensions') || '').split(',');
const isPreviewable = previewableExts.has(extname(filename));
const editorConfig = getEditorconfig(filenameInput);
togglePreviewDisplay(isPreviewable);
const {monaco, editor} = await createMonaco(textarea, filename, {
...baseOptions,
...getFileBasedOptions(filenameInput.value, lineWrapExts),
...getEditorConfigOptions(editorConfig),
});
filenameInput.addEventListener('input', onInputDebounce(() => {
const filename = filenameInput.value;
const previewable = previewableExts.has(extname(filename));
togglePreviewDisplay(previewable);
updateEditor(monaco, editor, filename, lineWrapExts);
}));
return editor;
}
function getEditorConfigOptions(ec: EditorConfig | null): MonacoOpts {
if (!ec || !isObject(ec)) return {};
const opts: MonacoOpts = {};
opts.detectIndentation = !('indent_style' in ec) || !('indent_size' in ec);
if ('indent_size' in ec) {
opts.indentSize = Number(ec.indent_size);
}
if ('tab_width' in ec) {
opts.tabSize = Number(ec.tab_width) || Number(ec.indent_size);
}
if ('max_line_length' in ec) {
opts.rulers = [Number(ec.max_line_length)];
}
opts.trimAutoWhitespace = ec.trim_trailing_whitespace === true;
opts.insertSpaces = ec.indent_style === 'space';
opts.useTabStops = ec.indent_style === 'tab';
return opts;
}
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