65 lines
1.9 KiB
TypeScript
65 lines
1.9 KiB
TypeScript
import {
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ExcalidrawElement,
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NonDeletedExcalidrawElement,
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} from "../element/types";
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import { getElementAbsoluteCoords, getElementBounds } from "../element";
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import { AppState } from "../types";
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export const getElementsWithinSelection = (
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elements: readonly NonDeletedExcalidrawElement[],
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selection: NonDeletedExcalidrawElement,
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) => {
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const [selectionX1, selectionY1, selectionX2, selectionY2] =
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getElementAbsoluteCoords(selection);
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return elements.filter((element) => {
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const [elementX1, elementY1, elementX2, elementY2] =
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getElementBounds(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 const isSomeElementSelected = (
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elements: readonly NonDeletedExcalidrawElement[],
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appState: AppState,
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): boolean =>
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elements.some((element) => appState.selectedElementIds[element.id]);
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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 const getCommonAttributeOfSelectedElements = <T>(
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elements: readonly NonDeletedExcalidrawElement[],
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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 const getSelectedElements = (
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elements: readonly NonDeletedExcalidrawElement[],
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appState: AppState,
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) => elements.filter((element) => appState.selectedElementIds[element.id]);
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export const getTargetElements = (
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elements: readonly NonDeletedExcalidrawElement[],
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appState: AppState,
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) =>
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appState.editingElement
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? [appState.editingElement]
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: getSelectedElements(elements, appState);
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