125 lines
3.2 KiB
TypeScript
125 lines
3.2 KiB
TypeScript
// Forked from https://codeberg.org/retronav/ixora
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// Original author: Pranav Karawale
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// License: Apache License 2.0.
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import {
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Decoration,
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EditorState,
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EditorView,
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foldedRanges,
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SyntaxNodeRef,
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syntaxTree,
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WidgetType,
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} from "../deps.ts";
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export class LinkWidget extends WidgetType {
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constructor(
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readonly text: string,
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readonly title: string,
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readonly cssClass: string,
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readonly callback: (e: MouseEvent) => void,
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) {
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super();
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}
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toDOM(): HTMLElement {
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const anchor = document.createElement("a");
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anchor.className = this.cssClass;
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anchor.textContent = this.text;
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anchor.addEventListener("click", (e) => {
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e.preventDefault();
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e.stopPropagation();
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this.callback(e);
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});
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anchor.setAttribute("title", this.title);
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anchor.href = "#";
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return anchor;
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}
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}
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/**
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* Check if two ranges overlap
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* Based on the visual diagram on https://stackoverflow.com/a/25369187
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* @param range1 - Range 1
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* @param range2 - Range 2
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* @returns True if the ranges overlap
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*/
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export function checkRangeOverlap(
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range1: [number, number],
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range2: [number, number],
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) {
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return range1[0] <= range2[1] && range2[0] <= range1[1];
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}
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/**
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* Check if a range is inside another range
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* @param parent - Parent (bigger) range
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* @param child - Child (smaller) range
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* @returns True if child is inside parent
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*/
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export function checkRangeSubset(
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parent: [number, number],
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child: [number, number],
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) {
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return child[0] >= parent[0] && child[1] <= parent[1];
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}
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/**
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* Check if any of the editor cursors is in the given range
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* @param state - Editor state
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* @param range - Range to check
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* @returns True if the cursor is in the range
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*/
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export function isCursorInRange(state: EditorState, range: [number, number]) {
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return state.selection.ranges.some((selection) =>
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checkRangeOverlap(range, [selection.from, selection.to])
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);
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}
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/**
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* Decoration to simply hide anything.
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*/
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export const invisibleDecoration = Decoration.replace({});
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export function iterateTreeInVisibleRanges(
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view: EditorView,
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iterateFns: {
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enter(node: SyntaxNodeRef): boolean | void;
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leave?(node: SyntaxNodeRef): void;
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},
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) {
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// for (const { from, to } of view.visibleRanges) {
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// syntaxTree(view.state).iterate({ ...iterateFns, from, to });
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// }
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syntaxTree(view.state).iterate(iterateFns);
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}
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/**
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* Returns the lines of the editor that are in the given range and not folded.
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* This function is of use when you need to get the lines of a particular
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* block node and add line decorations to each line of it.
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*
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* @param view - Editor view
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* @param from - Start of the range
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* @param to - End of the range
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* @returns A list of line blocks that are in the range
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*/
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export function editorLines(view: EditorView, from: number, to: number) {
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let lines = view.viewportLineBlocks.filter((block) =>
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// Keep lines that are in the range
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checkRangeOverlap([block.from, block.to], [from, to])
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);
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const folded = foldedRanges(view.state).iter();
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while (folded.value) {
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lines = lines.filter(
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(line) =>
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!checkRangeOverlap(
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[folded.from, folded.to],
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[line.from, line.to],
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),
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);
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folded.next();
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}
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return lines;
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}
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