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index.ts
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index.ts
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import type { Root } from "mdast";
import type { Plugin } from "unified";
import { visit } from "unist-util-visit";
export interface RemarkGitHubAlertsOptions {
/**
* List of markers to match.
* @default ['TIP', 'NOTE', 'IMPORTANT', 'WARNING', 'CAUTION']
*/
markers?: string[] | "*";
/**
* If markers case sensitively on matching.
* @default false
*/
matchCaseSensitive?: boolean;
/**
* Custom icons for each marker. The key is the marker name, and the value is the html script represent the icon.
* The key is always lowercase.
*
* @default inline svg icons from GitHub
*/
icons?: Record<string, string>;
/**
* Custom titles for each marker. The key is the marker name, and the value is the title.
* The key is always lowercase.
*
* When the title is not specified, the default title is the capitalized marker name.
*/
titles?: Record<string, string>;
/**
* Prefix for the class names.
*
* @default 'markdown-alert'
*/
classPrefix?: string;
}
const DEFAULT_GITHUB_ICONS = {
note: '<svg class="octicon octicon-info mr-2" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>',
tip: '<svg class="octicon octicon-light-bulb mr-2" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="M8 1.5c-2.363 0-4 1.69-4 3.75 0 .984.424 1.625.984 2.304l.214.253c.223.264.47.556.673.848.284.411.537.896.621 1.49a.75.75 0 0 1-1.484.211c-.04-.282-.163-.547-.37-.847a8.456 8.456 0 0 0-.542-.68c-.084-.1-.173-.205-.268-.32C3.201 7.75 2.5 6.766 2.5 5.25 2.5 2.31 4.863 0 8 0s5.5 2.31 5.5 5.25c0 1.516-.701 2.5-1.328 3.259-.095.115-.184.22-.268.319-.207.245-.383.453-.541.681-.208.3-.33.565-.37.847a.751.751 0 0 1-1.485-.212c.084-.593.337-1.078.621-1.489.203-.292.45-.584.673-.848.075-.088.147-.173.213-.253.561-.679.985-1.32.985-2.304 0-2.06-1.637-3.75-4-3.75ZM5.75 12h4.5a.75.75 0 0 1 0 1.5h-4.5a.75.75 0 0 1 0-1.5ZM6 15.25a.75.75 0 0 1 .75-.75h2.5a.75.75 0 0 1 0 1.5h-2.5a.75.75 0 0 1-.75-.75Z"></path></svg>',
important:
'<svg class="octicon octicon-report mr-2" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="M0 1.75C0 .784.784 0 1.75 0h12.5C15.216 0 16 .784 16 1.75v9.5A1.75 1.75 0 0 1 14.25 13H8.06l-2.573 2.573A1.458 1.458 0 0 1 3 14.543V13H1.75A1.75 1.75 0 0 1 0 11.25Zm1.75-.25a.25.25 0 0 0-.25.25v9.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-9.5a.25.25 0 0 0-.25-.25Zm7 2.25v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 9a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path></svg>',
warning:
'<svg class="octicon octicon-alert mr-2" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="M6.457 1.047c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0 1 14.082 15H1.918a1.75 1.75 0 0 1-1.543-2.575Zm1.763.707a.25.25 0 0 0-.44 0L1.698 13.132a.25.25 0 0 0 .22.368h12.164a.25.25 0 0 0 .22-.368Zm.53 3.996v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path></svg>',
caution:
'<svg class="octicon octicon-stop mr-2" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="M4.47.22A.749.749 0 0 1 5 0h6c.199 0 .389.079.53.22l4.25 4.25c.141.14.22.331.22.53v6a.749.749 0 0 1-.22.53l-4.25 4.25A.749.749 0 0 1 11 16H5a.749.749 0 0 1-.53-.22L.22 11.53A.749.749 0 0 1 0 11V5c0-.199.079-.389.22-.53Zm.84 1.28L1.5 5.31v5.38l3.81 3.81h5.38l3.81-3.81V5.31L10.69 1.5ZM8 4a.75.75 0 0 1 .75.75v3.5a.75.75 0 0 1-1.5 0v-3.5A.75.75 0 0 1 8 4Zm0 8a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg>',
};
const RemarkGithubAlerts: Plugin<RemarkGitHubAlertsOptions[], Root> = (
options = {},
) => {
const {
markers = ["TIP", "NOTE", "IMPORTANT", "WARNING", "CAUTION"],
icons = DEFAULT_GITHUB_ICONS,
matchCaseSensitive = false,
titles = {},
classPrefix = "markdown-alert",
} = options;
const markerNameRE = markers === "*" ? "\\w+" : markers.join("|");
const RE = new RegExp(
`^\\[\\!(${markerNameRE})\\]([^\\n\\r]*)`,
matchCaseSensitive ? "" : "i",
);
return (tree) => {
visit(tree, "blockquote", (node) => {
const childNode = node.children.at(0);
if (childNode?.type !== "paragraph") return;
const content = childNode.children.at(0);
if (content?.type !== "text") return;
const match = content.value.match(RE);
if (!match) return;
const type = match[1].toLowerCase() as keyof typeof icons;
const title = match[2].trim() || (titles[type] ?? capitalize(type));
const icon = icons[type] ?? "";
const matchText = match[0];
content.value = content.value.slice(matchText.length).trimStart();
node.data = {
hName: "div",
hProperties: {
class: `${classPrefix} ${classPrefix}-${type}`,
},
};
node.children = [
{
type: "paragraph",
data: {
hName: "p",
hProperties: {
class: `${classPrefix}-title`,
},
},
children: [
{
type: "html",
value: icon,
},
{ type: "text", value: title },
],
},
...node.children,
];
});
return tree;
};
};
function capitalize(str: string) {
return str.charAt(0).toUpperCase() + str.slice(1);
}
export default RemarkGithubAlerts;