29 lines
1.5 KiB
JavaScript
29 lines
1.5 KiB
JavaScript
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import removeElementsFromArray from './remove-items-from-array';
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export function shiftClick (items, selectedItems, currentClickedItem, singleSelectedItem) {
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// Get indexes from items
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const lastSelectedItemIndex = items.findIndex(item => item.id === selectedItems[selectedItems.length - 1].id);
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const currentClickedItemIndex = items.indexOf(currentClickedItem);
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const singleSelectedItemIndex = items.findIndex(item => item.id === singleSelectedItem.id);
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// Calculate items to select
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const currentSelectedRangeStart = Math.min(singleSelectedItemIndex, currentClickedItemIndex);
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const itemsToSelect = Math.abs(singleSelectedItemIndex - currentClickedItemIndex) + 1;
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const nextSelectedItems = items.slice(currentSelectedRangeStart, currentSelectedRangeStart + itemsToSelect);
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// If the selection is upwards, reverse selected items so that the delete range is correct
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if (currentClickedItemIndex < singleSelectedItemIndex) {
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nextSelectedItems.reverse();
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}
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// Calculate items to delete
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const previousSelectedRangeStart = Math.min(lastSelectedItemIndex, currentClickedItemIndex);
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const itemsToDelete = Math.abs(lastSelectedItemIndex - currentClickedItemIndex) + 1;
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const previousSelectedRange = items.slice(previousSelectedRangeStart, previousSelectedRangeStart + itemsToDelete);
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// Delete previous items from array and add the new ones
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selectedItems = removeElementsFromArray(selectedItems, previousSelectedRange);
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const currentSelectedItems = selectedItems.concat(nextSelectedItems);
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return Array.from(new Set(currentSelectedItems));
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}
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