100 lines
2.5 KiB
TypeScript
100 lines
2.5 KiB
TypeScript
import { ExcalidrawElement } from "../element/types";
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import { getElementAbsoluteCoords } from "../element";
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import { AppState } from "../types";
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export function getElementsWithinSelection(
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elements: readonly ExcalidrawElement[],
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selection: ExcalidrawElement,
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) {
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const [
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selectionX1,
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selectionY1,
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selectionX2,
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selectionY2,
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] = getElementAbsoluteCoords(selection);
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return elements.filter(element => {
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const [
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elementX1,
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elementY1,
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elementX2,
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elementY2,
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] = getElementAbsoluteCoords(element);
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return (
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element.type !== "selection" &&
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selectionX1 <= elementX1 &&
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selectionY1 <= elementY1 &&
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selectionX2 >= elementX2 &&
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selectionY2 >= elementY2
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);
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});
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}
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export function deleteSelectedElements(
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elements: readonly ExcalidrawElement[],
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appState: AppState,
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) {
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return {
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elements: elements.filter(el => !appState.selectedElementIds[el.id]),
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appState: {
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...appState,
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selectedElementIds: {},
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},
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};
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}
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export function getSelectedIndices(
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elements: readonly ExcalidrawElement[],
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appState: AppState,
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) {
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const selectedIndices: number[] = [];
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elements.forEach((element, index) => {
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if (appState.selectedElementIds[element.id]) {
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selectedIndices.push(index);
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}
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});
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return selectedIndices;
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}
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export function isSomeElementSelected(
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elements: readonly ExcalidrawElement[],
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appState: AppState,
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): boolean {
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return elements.some(element => appState.selectedElementIds[element.id]);
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}
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/**
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* Returns common attribute (picked by `getAttribute` callback) of selected
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* elements. If elements don't share the same value, returns `null`.
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*/
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export function getCommonAttributeOfSelectedElements<T>(
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elements: readonly ExcalidrawElement[],
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appState: AppState,
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getAttribute: (element: ExcalidrawElement) => T,
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): T | null {
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const attributes = Array.from(
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new Set(
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getSelectedElements(elements, appState).map(element =>
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getAttribute(element),
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),
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),
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);
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return attributes.length === 1 ? attributes[0] : null;
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}
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export function getSelectedElements(
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elements: readonly ExcalidrawElement[],
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appState: AppState,
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): readonly ExcalidrawElement[] {
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return elements.filter(element => appState.selectedElementIds[element.id]);
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}
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export function getTargetElement(
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elements: readonly ExcalidrawElement[],
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appState: AppState,
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) {
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return appState.editingElement
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? [appState.editingElement]
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: getSelectedElements(elements, appState);
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}
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