100 lines
2.9 KiB
Svelte
100 lines
2.9 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 * as tr from "@tslib/ftl";
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import { getPlatformString } from "@tslib/shortcuts";
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import { removeStyleProperties } from "@tslib/styling";
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import { singleCallback } from "@tslib/typing";
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import { onMount } from "svelte";
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import IconButton from "../../components/IconButton.svelte";
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import Shortcut from "../../components/Shortcut.svelte";
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import WithState from "../../components/WithState.svelte";
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import { updateStateByKey } from "../../components/WithState.svelte";
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import type { MatchType } from "../../domlib/surround";
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import { surrounder } from "../rich-text-input";
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import { context as editorToolbarContext } from "./EditorToolbar.svelte";
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import { subscriptIcon } from "./icons";
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const surroundElement = document.createElement("sub");
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export function matcher(element: HTMLElement | SVGElement, match: MatchType): void {
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if (element.tagName === "SUB") {
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return match.remove();
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}
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if (element.style.verticalAlign === "sub") {
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return match.clear((): void => {
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if (
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removeStyleProperties(element, "vertical-align") &&
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element.className.length === 0
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) {
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return match.remove();
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}
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});
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}
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}
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const key = "subscript";
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const format = {
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surroundElement,
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matcher,
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};
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const namedFormat = {
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key,
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name: tr.editingSubscript(),
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show: true,
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active: true,
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};
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const { removeFormats } = editorToolbarContext.get();
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removeFormats.update((formats) => [...formats, namedFormat]);
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async function updateStateFromActiveInput(): Promise<boolean> {
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return disabled ? false : surrounder.isSurrounded(key);
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}
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function makeSub(): void {
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surrounder.surround(key, ["superscript"]);
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}
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const keyCombination = "Control+Shift+=";
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let disabled: boolean;
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onMount(() =>
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singleCallback(
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surrounder.active.subscribe((value) => (disabled = !value)),
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surrounder.registerFormat(key, format),
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),
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);
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</script>
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<WithState {key} update={updateStateFromActiveInput} let:state={active} let:updateState>
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<IconButton
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tooltip="{tr.editingSubscript()} ({getPlatformString(keyCombination)})"
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{active}
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{disabled}
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on:click={(event) => {
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makeSub();
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updateState(event);
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updateStateByKey("superscript", event);
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}}
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>
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{@html subscriptIcon}
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</IconButton>
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<Shortcut
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{keyCombination}
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on:action={(event) => {
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makeSub();
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updateState(event);
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updateStateByKey("superscript", event);
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}}
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/>
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</WithState>
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