610ef8f043
* Add utility functions for saving and restoring the caret location * Implement cross-browser.getSelection * Save and restore location on ContentEditable * Fix refocus by clicking on a field that had a non-collapsed selection
34 lines
1.1 KiB
TypeScript
34 lines
1.1 KiB
TypeScript
// 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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import { getNodeCoordinates } from "./node";
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import type { CaretLocation } from "./location";
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interface RangeCoordinatesCollapsed {
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readonly start: CaretLocation;
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readonly collapsed: true;
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}
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interface RangeCoordinatesContent {
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readonly start: CaretLocation;
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readonly end: CaretLocation;
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readonly collapsed: false;
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}
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export type RangeCoordinates = RangeCoordinatesCollapsed | RangeCoordinatesContent;
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export function getRangeCoordinates(base: Node, range: Range): RangeCoordinates {
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const startCoordinates = getNodeCoordinates(base, range.startContainer);
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const start = { coordinates: startCoordinates, offset: range.startOffset };
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const collapsed = range.collapsed;
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if (collapsed) {
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return { start, collapsed };
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}
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const endCoordinates = getNodeCoordinates(base, range.endContainer);
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const end = { coordinates: endCoordinates, offset: range.endOffset };
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return { start, end, collapsed };
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}
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