anki/ts/editor/CodeMirror.svelte

71 lines
2.1 KiB
Svelte

<!--
Copyright: Ankitects Pty Ltd and contributors
License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
-->
<script context="module" lang="ts">
import { CodeMirror as CodeMirrorLib } from "./code-mirror";
export interface CodeMirrorAPI {
readonly editor: CodeMirrorLib.EditorFromTextArea;
}
</script>
<script lang="ts">
import { createEventDispatcher, getContext } from "svelte";
import type { Writable } from "svelte/store";
import storeSubscribe from "../sveltelib/store-subscribe";
import { directionKey } from "../lib/context-keys";
export let configuration: CodeMirror.EditorConfiguration;
export let code: Writable<string>;
const direction = getContext<Writable<"ltr" | "rtl">>(directionKey);
const defaultConfiguration = {
direction: $direction,
rtlMoveVisually: true,
};
let codeMirror: CodeMirror.EditorFromTextArea;
$: codeMirror?.setOption("direction", $direction);
function setValue(content: string): void {
codeMirror.setValue(content);
}
const { subscribe, unsubscribe } = storeSubscribe(code, setValue, false);
const dispatch = createEventDispatcher();
function openCodeMirror(textarea: HTMLTextAreaElement): void {
codeMirror = CodeMirrorLib.fromTextArea(textarea, {
...defaultConfiguration,
...configuration,
});
// TODO passing in the tabindex option does not do anything: bug?
codeMirror.getInputField().tabIndex = 0;
codeMirror.on("change", () => dispatch("change", codeMirror.getValue()));
codeMirror.on("focus", () => {
unsubscribe();
dispatch("focus");
});
codeMirror.on("blur", () => {
subscribe();
dispatch("blur");
});
subscribe();
}
export const api = Object.create(
{},
{
editor: { get: () => codeMirror },
},
) as CodeMirrorAPI;
</script>
<div class="code-mirror">
<textarea tabindex="-1" hidden use:openCodeMirror />
</div>