import { EditorView } from '@codemirror/view' import { Annotation, Compartment, TransactionSpec } from '@codemirror/state' import { syntaxHighlighting } from '@codemirror/language' import { classHighlighter } from './class-highlighter' const optionsThemeConf = new Compartment() const selectedThemeConf = new Compartment() export const themeOptionsChange = Annotation.define() export type FontFamily = 'monaco' | 'lucida' export type LineHeight = 'compact' | 'normal' | 'wide' export type OverallTheme = '' | 'light-' type Options = { fontSize: number fontFamily: FontFamily lineHeight: LineHeight overallTheme: OverallTheme } export const theme = (options: Options) => [ baseTheme, staticTheme, /** * Syntax highlighting, using a highlighter which maps tags to class names. */ syntaxHighlighting(classHighlighter), optionsThemeConf.of(createThemeFromOptions(options)), selectedThemeConf.of([]), ] export const setOptionsTheme = (options: Options): TransactionSpec => { return { effects: optionsThemeConf.reconfigure(createThemeFromOptions(options)), annotations: themeOptionsChange.of(true), } } export const setEditorTheme = async ( editorTheme: string ): Promise => { const theme = await loadSelectedTheme(editorTheme) return { effects: selectedThemeConf.reconfigure(theme), } } const svgUrl = (content: string) => `url('data:image/svg+xml,${encodeURIComponent( `${content}` )}')` export const lineHeights: Record = { compact: 1.33, normal: 1.6, wide: 2, } const fontFamilies: Record = { monaco: ['Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', 'monospace'], lucida: ['Lucida Console', 'Source Code Pro', 'monospace'], } const createThemeFromOptions = ({ fontSize = 12, fontFamily = 'monaco', lineHeight = 'normal', overallTheme = '', }: Options) => { /** * Theme styles that depend on settings. */ return [ EditorView.editorAttributes.of({ class: overallTheme === '' ? 'overall-theme-dark' : 'overall-theme-light', style: Object.entries({ '--font-size': `${fontSize}px`, '--source-font-family': fontFamilies[fontFamily]?.join(', '), '--line-height': lineHeights[lineHeight], }) .map(([key, value]) => `${key}: ${value}`) .join(';'), }), // set variables for tooltips, which are outside the editor // TODO: set these on document.body, or a new container element for the tooltips, without using a style mod EditorView.theme({ '.cm-tooltip': { '--font-size': `${fontSize}px`, '--source-font-family': fontFamilies[fontFamily]?.join(', '), '--line-height': lineHeights[lineHeight], }, }), ] } /** * Base styles that can have &dark and &light variants */ const baseTheme = EditorView.baseTheme({ '.cm-content': { fontSize: 'var(--font-size)', fontFamily: 'var(--source-font-family)', lineHeight: 'var(--line-height)', }, '.cm-cursor-primary': { fontSize: 'var(--font-size)', fontFamily: 'var(--source-font-family)', lineHeight: 'var(--line-height)', }, '.cm-gutters': { fontSize: 'var(--font-size)', lineHeight: 'var(--line-height)', }, '.cm-tooltip': { // NOTE: fontFamily is not set here, as most tooltips use the UI font fontSize: 'var(--font-size)', }, '.cm-panel': { fontSize: 'var(--font-size)', }, '.cm-foldGutter .cm-gutterElement > span': { height: 'calc(var(--font-size) * var(--line-height))', }, '.cm-lineNumbers': { fontFamily: 'var(--source-font-family)', }, // double the specificity to override the underline squiggle '.cm-lintRange.cm-lintRange': { backgroundImage: 'none', }, // use a background color for lint error ranges '.cm-lintRange-error': { padding: 'var(--half-leading, 0) 0', background: 'rgba(255, 0, 0, 0.2)', // avoid highlighting nested error ranges '& .cm-lintRange-error': { background: 'none', }, }, '.cm-specialChar': { color: 'red', backgroundColor: 'rgba(255, 0, 0, 0.1)', }, '.cm-widgetBuffer': { height: '1.3em', }, '.cm-snippetFieldPosition': { display: 'inline-block', height: '1.3em', }, // style the gutter fold button on hover '&dark .cm-foldGutter .cm-gutterElement > span:hover': { boxShadow: '0 1px 1px rgba(255, 255, 255, 0.2)', backgroundColor: 'rgba(255, 255, 255, 0.1)', }, '&light .cm-foldGutter .cm-gutterElement > span:hover': { borderColor: 'rgba(0, 0, 0, 0.3)', boxShadow: '0 1px 1px rgba(255, 255, 255, 0.7)', backgroundColor: 'rgba(255, 255, 255, 0.2)', }, '.cm-diagnosticSource': { display: 'none', }, '.ol-cm-diagnostic-actions': { marginTop: '4px', }, '.cm-diagnostic:last-of-type .ol-cm-diagnostic-actions': { marginBottom: '4px', }, }) /** * Theme styles that don't depend on settings. */ // TODO: move some/all of these into baseTheme? const staticTheme = EditorView.theme({ // make the editor fill the available height '&': { height: '100%', textRendering: 'optimizeSpeed', }, // remove the outline from the focused editor '&.cm-editor.cm-focused:not(:focus-visible)': { outline: 'none', }, // override default styles for the search panel '.cm-panel.cm-search label': { display: 'inline-flex', alignItems: 'center', fontWeight: 'normal', }, '.cm-selectionLayer': { zIndex: -10, }, // remove the right-hand border from the gutter // ensure the gutter doesn't shrink '.cm-gutters': { borderRight: 'none', flexShrink: 0, }, // style the gutter fold button // TODO: add a class to this element for easier theming '.cm-foldGutter .cm-gutterElement > span': { border: '1px solid transparent', borderRadius: '3px', display: 'inline-flex', flexDirection: 'column', justifyContent: 'center', color: 'rgba(109, 109, 109, 0.7)', }, // reduce the padding around line numbers '.cm-lineNumbers .cm-gutterElement': { padding: '0', userSelect: 'none', }, // make cursor visible with reduced opacity when the editor is not focused '&:not(.cm-focused) > .cm-scroller > .cm-cursorLayer .cm-cursor': { display: 'block', opacity: 0.2, }, // make the cursor wider, and use the themed color '.cm-cursor, .cm-dropCursor': { borderWidth: '2px', marginLeft: '-1px', // half the border width borderLeftColor: 'inherit', }, // remove border from hover tooltips (e.g. cursor highlights) '.cm-tooltip-hover': { border: 'none', }, // use the same style as Ace for snippet fields '.cm-snippetField': { background: 'rgba(194, 193, 208, 0.09)', border: '1px dotted rgba(211, 208, 235, 0.62)', }, // style the fold placeholder '.cm-foldPlaceholder': { boxSizing: 'border-box', display: 'inline-block', height: '11px', width: '1.8em', marginTop: '-2px', verticalAlign: 'middle', backgroundImage: 'url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAAJCAYAAADU6McMAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAJpJREFUeNpi/P//PwOlgAXGYGRklAVSokD8GmjwY1wasKljQpYACtpCFeADcHVQfQyMQAwzwAZI3wJKvCLkfKBaMSClBlR7BOQikCFGQEErIH0VqkabiGCAqwUadAzZJRxQr/0gwiXIal8zQQPnNVTgJ1TdawL0T5gBIP1MUJNhBv2HKoQHHjqNrA4WO4zY0glyNKLT2KIfIMAAQsdgGiXvgnYAAAAASUVORK5CYII="),url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAA3CAYAAADNNiA5AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAACJJREFUeNpi+P//fxgTAwPDBxDxD078RSX+YeEyDFMCIMAAI3INmXiwf2YAAAAASUVORK5CYII=")', backgroundRepeat: 'no-repeat, repeat-x', backgroundPosition: 'center center, top left', color: 'transparent', border: '1px solid black', borderRadius: '2px', }, // align the lint icons with the line numbers '.cm-gutter-lint .cm-gutterElement': { padding: '0.3em', }, // reset the default style for the lint gutter error marker, which uses :before '.cm-lint-marker-error:before': { content: 'normal', }, // set a new icon for the lint gutter error marker '.cm-lint-marker-error': { content: svgUrl( `` ), }, // set a new icon for the lint gutter warning marker '.cm-lint-marker-warning': { content: svgUrl( `` ), }, }) const themeCache = new Map() const loadSelectedTheme = async (editorTheme: string) => { if (!editorTheme) { editorTheme = 'textmate' // use the default theme if unset } if (!themeCache.has(editorTheme)) { const { theme, highlightStyle, dark } = await import( /* webpackChunkName: "cm6-theme" */ `../themes/cm6/${editorTheme}.json` ) const extension = [ EditorView.theme(theme, { dark }), EditorView.theme(highlightStyle, { dark }), ] themeCache.set(editorTheme, extension) } return themeCache.get(editorTheme) }