57 lines
1.5 KiB
TypeScript
57 lines
1.5 KiB
TypeScript
/// <reference types="resize-observer-browser" />
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import {
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Ref,
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ref,
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inject,
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watch,
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provide,
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} from 'vue';
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interface BlockRect {
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height: number;
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width: number;
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left: number;
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top: number;
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}
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export const SymBlockDimensions = Symbol('Schlechtenburg block dimensions');
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export const SymEditorDimensions = Symbol('Schlechtenburg editor dimensions');
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export function useResizeObserver(el: Ref<null|HTMLElement>, symbol: symbol) {
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const dimensions: Ref<null|BlockRect> = ref(null);
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provide(symbol, dimensions);
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const triggerSizeCalculation = () => {
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if (!el.value) {
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return;
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}
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const clientRect = el.value.getBoundingClientRect();
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dimensions.value = {
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width: clientRect.width,
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height: clientRect.height,
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left: el.value.offsetLeft,
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top: el.value.offsetTop,
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};
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};
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const resizeObserver = new ResizeObserver(triggerSizeCalculation);
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const mutationObserver = new MutationObserver(triggerSizeCalculation);
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watch(el, () => {
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if (!el.value) {
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return;
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}
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resizeObserver.observe(el.value);
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mutationObserver.observe(el.value, { attributes: true, childList: false, subtree: false });
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});
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return { triggerSizeCalculation, dimensions };
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}
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export function useBlockSizing() {
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const editorDimensions: Ref<BlockRect|null> = inject(SymEditorDimensions, ref(null));
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const blockDimensions: Ref<BlockRect|null> = inject(SymBlockDimensions, ref(null));
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return { editorDimensions, blockDimensions };
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}
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