120 lines
3.5 KiB
Svelte
120 lines
3.5 KiB
Svelte
<!--
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Copyright: Ankitects Pty Ltd and contributors
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License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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-->
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<script lang="ts">
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import type CodeMirrorLib from "codemirror";
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import { createEventDispatcher, onMount } from "svelte";
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import type { Writable } from "svelte/store";
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import * as tr from "../../lib/ftl";
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import { noop } from "../../lib/functional";
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import { getPlatformString } from "../../lib/shortcuts";
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import { baseOptions, focusAndSetCaret, latex } from "../code-mirror";
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import type { CodeMirrorAPI } from "../CodeMirror.svelte";
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import CodeMirror from "../CodeMirror.svelte";
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export let code: Writable<string>;
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export let acceptShortcut: string;
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export let newlineShortcut: string;
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const configuration = {
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...Object.assign({}, baseOptions, {
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extraKeys: {
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...(baseOptions.extraKeys as CodeMirrorLib.KeyMap),
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[acceptShortcut]: noop,
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[newlineShortcut]: noop,
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},
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}),
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placeholder: tr.editingMathjaxPlaceholder({
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accept: getPlatformString(acceptShortcut),
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newline: getPlatformString(newlineShortcut),
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}),
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mode: latex,
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};
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/* These are not reactive, but only operate on initialization */
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export let position: CodeMirrorLib.Position | undefined = undefined;
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export let selectAll: boolean;
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const dispatch = createEventDispatcher();
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let codeMirror = {} as CodeMirrorAPI;
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onMount(async () => {
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const editor = await codeMirror.editor;
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focusAndSetCaret(editor, position);
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if (selectAll) {
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editor.execCommand("selectAll");
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}
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let direction: "start" | "end" | undefined = undefined;
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editor.on(
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"keydown",
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(_instance: CodeMirrorLib.Editor, event: KeyboardEvent): void => {
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if (event.key === "ArrowLeft") {
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direction = "start";
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} else if (event.key === "ArrowRight") {
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direction = "end";
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}
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},
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);
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editor.on(
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"beforeSelectionChange",
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(
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instance: CodeMirrorLib.Editor,
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obj: CodeMirrorLib.EditorSelectionChange,
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): void => {
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const { anchor } = obj.ranges[0];
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if (anchor["hitSide"]) {
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if (instance.getValue().length === 0) {
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if (direction) {
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dispatch(`moveout${direction}`);
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}
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} else if (anchor.line === 0 && anchor.ch === 0) {
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dispatch("moveoutstart");
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} else {
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dispatch("moveoutend");
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}
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}
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direction = undefined;
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},
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);
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});
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</script>
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<div class="mathjax-editor">
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<CodeMirror
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{code}
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{configuration}
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bind:api={codeMirror}
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on:change={({ detail: mathjaxText }) => code.set(mathjaxText)}
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on:blur
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/>
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</div>
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<slot editor={codeMirror} />
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<style lang="scss">
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.mathjax-editor {
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:global(.CodeMirror) {
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max-width: 28rem;
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min-width: 14rem;
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margin-bottom: 0.25rem;
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}
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:global(.CodeMirror-placeholder) {
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font-family: sans-serif;
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font-size: 55%;
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text-align: center;
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color: var(--slightly-grey-text);
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}
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}
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</style>
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