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web/elements: auto-switch themes for codemirror 

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>
This commit is contained in:
Jens Langhammer 2022-07-02 23:07:09 +02:00
parent 2a2ae4bc4f
commit 23c1e22a04
1 changed files with 28 additions and 2 deletions
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30
web/src/elements/CodeMirror.ts
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@ -10,7 +10,7 @@ import {
syntaxHighlighting, syntaxHighlighting,
} from "@codemirror/language"; } from "@codemirror/language";
import * as yamlMode from "@codemirror/legacy-modes/mode/yaml"; import * as yamlMode from "@codemirror/legacy-modes/mode/yaml";
import { EditorState, Extension } from "@codemirror/state"; import { Compartment, EditorState, Extension } from "@codemirror/state";
import { EditorView, keymap, lineNumbers } from "@codemirror/view"; import { EditorView, keymap, lineNumbers } from "@codemirror/view";
import YAML from "yaml"; import YAML from "yaml";
@ -32,6 +32,11 @@ export class CodeMirrorTextarea extends LitElement {
_value?: string; _value?: string;
theme: Compartment;
themeLight: Extension;
themeDark: Extension;
@property() @property()
// eslint-disable-next-line @typescript-eslint/no-explicit-any,@typescript-eslint/explicit-module-boundary-types // eslint-disable-next-line @typescript-eslint/no-explicit-any,@typescript-eslint/explicit-module-boundary-types
set value(v: any) { set value(v: any) {
@ -77,6 +82,13 @@ export class CodeMirrorTextarea extends LitElement {
} }
} }
constructor() {
super();
this.theme = new Compartment();
this.themeLight = EditorView.theme({}, { dark: false });
this.themeDark = EditorView.theme({}, { dark: true });
}
private getInnerValue(): string { private getInnerValue(): string {
if (!this.editor) { if (!this.editor) {
return ""; return "";
@ -101,6 +113,18 @@ export class CodeMirrorTextarea extends LitElement {
} }
firstUpdated(): void { firstUpdated(): void {
const matcher = window.matchMedia("(prefers-color-scheme: light)");
const handler = (ev?: MediaQueryListEvent) => {
let theme;
if (ev?.matches || matcher.matches) {
theme = this.themeLight;
} else {
theme = this.themeDark;
}
this.editor?.dispatch({
effects: this.theme.reconfigure(theme),
});
};
const extensions = [ const extensions = [
history(), history(),
keymap.of([...defaultKeymap, ...historyKeymap]), keymap.of([...defaultKeymap, ...historyKeymap]),
@ -110,7 +134,7 @@ export class CodeMirrorTextarea extends LitElement {
EditorView.lineWrapping, EditorView.lineWrapping,
EditorState.readOnly.of(this.readOnly), EditorState.readOnly.of(this.readOnly),
EditorState.tabSize.of(2), EditorState.tabSize.of(2),
// scrollPastEnd(), this.theme.of(this.themeLight),
]; ];
this.editor = new EditorView({ this.editor = new EditorView({
extensions: extensions.filter((p) => p) as Extension[], extensions: extensions.filter((p) => p) as Extension[],
@ -118,5 +142,7 @@ export class CodeMirrorTextarea extends LitElement {
doc: this._value, doc: this._value,
}); });
this.shadowRoot?.appendChild(this.editor.dom); this.shadowRoot?.appendChild(this.editor.dom);
matcher.addEventListener("change", handler);
handler();
} }
} }