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79 changes: 79 additions & 0 deletions
79
packages/core/src/components/discord-ordered-list/DiscordOrderedList.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| import { css, html, LitElement } from 'lit'; | ||
| import { customElement, property, state } from 'lit/decorators.js'; | ||
| import { DiscordComponentsError } from '../../util.js'; | ||
|
|
||
| @customElement('discord-ordered-list') | ||
| export class DiscordOrderedList extends LitElement { | ||
| public static override styles = css` | ||
| :host > ol { | ||
| list-style-image: initial; | ||
| list-style-type: decimal; | ||
| list-style-position: outside; | ||
| margin-bottom: 0px; | ||
| margin-top: 4px; | ||
| margin-right: 0px; | ||
| margin-left: calc(0.4em + 0.6em * var(--totalCharacters)); | ||
| padding: 0px; | ||
| } | ||
| `; | ||
|
|
||
| /** | ||
| * The starting number for the ordered list. | ||
| * | ||
| * You can set this to start the list at a specific number | ||
| * | ||
| * @default 1 | ||
| */ | ||
| @property({ type: Number, reflect: true }) | ||
| public accessor start = 1; | ||
|
|
||
| @state() | ||
| private accessor startLength = 1; | ||
|
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| public checkChildren() { | ||
| const allChildrenAreListItems = Array.from(this.children).every((child) => { | ||
| const tagNameLowerCase = child.tagName.toLowerCase(); | ||
| return ( | ||
| tagNameLowerCase === 'discord-list-item' || | ||
| tagNameLowerCase === 'discord-unordered-list' || | ||
| tagNameLowerCase === 'discord-ordered-list' | ||
| ); | ||
| }); | ||
|
|
||
| if (!allChildrenAreListItems) { | ||
| throw new DiscordComponentsError( | ||
| 'All direct children inside of a <discord-ordered-list> components must be one of <discord-unordered-list>, <discord-ordered-list>, or <discord-list-item>.' | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Checks how many children of `<discord-list-item>` this component has and updates | ||
| * the {@link DiscordOrderedList.startLength startLength} state. | ||
| */ | ||
| protected override willUpdate(): void { | ||
| const amountOfListItems = Array.from(this.children).filter((child) => { | ||
| return child.tagName.toLowerCase() === 'discord-list-item'; | ||
| }).length; | ||
|
|
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| const totalCount = this.start + amountOfListItems; | ||
|
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| this.startLength = totalCount.toString().length; | ||
| } | ||
|
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| protected override render() { | ||
| this.checkChildren(); | ||
|
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| // We disable the eslint rule here because users should use the <discord-list-item> component inside of this component. | ||
| // eslint-disable-next-line lit-a11y/list | ||
| return html`<ol start=${this.start} style="--totalCharacters:${this.startLength}"> | ||
| <slot></slot> | ||
| </ol>`; | ||
| } | ||
| } | ||
|
|
||
| declare global { | ||
| interface HTMLElementTagNameMap { | ||
| 'discord-ordered-list': DiscordOrderedList; | ||
| } | ||
| } |
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