334 lines
12 KiB
JavaScript
334 lines
12 KiB
JavaScript
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import { createVNode as _createVNode } from "vue";
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// Styles
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import "./VSlideGroup.css";
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// Components
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import { VFadeTransition } from "../transitions/index.mjs";
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import { VIcon } from "../VIcon/index.mjs"; // Composables
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import { makeComponentProps } from "../../composables/component.mjs";
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import { makeDisplayProps, useDisplay } from "../../composables/display.mjs";
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import { makeGroupProps, useGroup } from "../../composables/group.mjs";
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import { IconValue } from "../../composables/icons.mjs";
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import { useRtl } from "../../composables/locale.mjs";
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import { useResizeObserver } from "../../composables/resizeObserver.mjs";
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import { makeTagProps } from "../../composables/tag.mjs"; // Utilities
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import { computed, shallowRef, watch } from 'vue';
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import { bias, calculateCenteredOffset, calculateUpdatedOffset } from "./helpers.mjs";
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import { clamp, focusableChildren, genericComponent, IN_BROWSER, propsFactory, useRender } from "../../util/index.mjs"; // Types
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export const VSlideGroupSymbol = Symbol.for('vuetify:v-slide-group');
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export const makeVSlideGroupProps = propsFactory({
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centerActive: Boolean,
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direction: {
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type: String,
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default: 'horizontal'
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},
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symbol: {
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type: null,
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default: VSlideGroupSymbol
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},
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nextIcon: {
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type: IconValue,
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default: '$next'
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},
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prevIcon: {
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type: IconValue,
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default: '$prev'
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},
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showArrows: {
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type: [Boolean, String],
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validator: v => typeof v === 'boolean' || ['always', 'desktop', 'mobile'].includes(v)
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},
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...makeComponentProps(),
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...makeDisplayProps(),
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...makeTagProps(),
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...makeGroupProps({
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selectedClass: 'v-slide-group-item--active'
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})
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}, 'VSlideGroup');
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export const VSlideGroup = genericComponent()({
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name: 'VSlideGroup',
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props: makeVSlideGroupProps(),
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emits: {
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'update:modelValue': value => true
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},
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setup(props, _ref) {
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let {
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slots
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} = _ref;
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const {
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isRtl
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} = useRtl();
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const {
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displayClasses,
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mobile
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} = useDisplay(props);
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const group = useGroup(props, props.symbol);
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const isOverflowing = shallowRef(false);
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const scrollOffset = shallowRef(0);
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const containerSize = shallowRef(0);
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const contentSize = shallowRef(0);
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const isHorizontal = computed(() => props.direction === 'horizontal');
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const {
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resizeRef: containerRef,
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contentRect: containerRect
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} = useResizeObserver();
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const {
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resizeRef: contentRef,
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contentRect
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} = useResizeObserver();
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const firstSelectedIndex = computed(() => {
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if (!group.selected.value.length) return -1;
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return group.items.value.findIndex(item => item.id === group.selected.value[0]);
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});
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const lastSelectedIndex = computed(() => {
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if (!group.selected.value.length) return -1;
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return group.items.value.findIndex(item => item.id === group.selected.value[group.selected.value.length - 1]);
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});
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if (IN_BROWSER) {
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let frame = -1;
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watch(() => [group.selected.value, containerRect.value, contentRect.value, isHorizontal.value], () => {
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cancelAnimationFrame(frame);
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frame = requestAnimationFrame(() => {
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if (containerRect.value && contentRect.value) {
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const sizeProperty = isHorizontal.value ? 'width' : 'height';
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containerSize.value = containerRect.value[sizeProperty];
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contentSize.value = contentRect.value[sizeProperty];
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isOverflowing.value = containerSize.value + 1 < contentSize.value;
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}
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if (firstSelectedIndex.value >= 0 && contentRef.value) {
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// TODO: Is this too naive? Should we store element references in group composable?
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const selectedElement = contentRef.value.children[lastSelectedIndex.value];
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if (firstSelectedIndex.value === 0 || !isOverflowing.value) {
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scrollOffset.value = 0;
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} else if (props.centerActive) {
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scrollOffset.value = calculateCenteredOffset({
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selectedElement,
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containerSize: containerSize.value,
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contentSize: contentSize.value,
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isRtl: isRtl.value,
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isHorizontal: isHorizontal.value
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});
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} else if (isOverflowing.value) {
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scrollOffset.value = calculateUpdatedOffset({
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selectedElement,
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containerSize: containerSize.value,
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contentSize: contentSize.value,
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isRtl: isRtl.value,
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currentScrollOffset: scrollOffset.value,
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isHorizontal: isHorizontal.value
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});
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}
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}
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});
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});
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}
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const disableTransition = shallowRef(false);
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let startTouch = 0;
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let startOffset = 0;
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function onTouchstart(e) {
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const sizeProperty = isHorizontal.value ? 'clientX' : 'clientY';
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const sign = isRtl.value && isHorizontal.value ? -1 : 1;
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startOffset = sign * scrollOffset.value;
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startTouch = e.touches[0][sizeProperty];
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disableTransition.value = true;
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}
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function onTouchmove(e) {
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if (!isOverflowing.value) return;
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const sizeProperty = isHorizontal.value ? 'clientX' : 'clientY';
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const sign = isRtl.value && isHorizontal.value ? -1 : 1;
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scrollOffset.value = sign * (startOffset + startTouch - e.touches[0][sizeProperty]);
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}
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function onTouchend(e) {
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const maxScrollOffset = contentSize.value - containerSize.value;
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if (scrollOffset.value < 0 || !isOverflowing.value) {
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scrollOffset.value = 0;
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} else if (scrollOffset.value >= maxScrollOffset) {
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scrollOffset.value = maxScrollOffset;
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}
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disableTransition.value = false;
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}
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function onScroll() {
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if (!containerRef.value) return;
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containerRef.value[isHorizontal.value ? 'scrollLeft' : 'scrollTop'] = 0;
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}
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const isFocused = shallowRef(false);
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function onFocusin(e) {
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isFocused.value = true;
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if (!isOverflowing.value || !contentRef.value) return;
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// Focused element is likely to be the root of an item, so a
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// breadth-first search will probably find it in the first iteration
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for (const el of e.composedPath()) {
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for (const item of contentRef.value.children) {
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if (item === el) {
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scrollOffset.value = calculateUpdatedOffset({
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selectedElement: item,
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containerSize: containerSize.value,
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contentSize: contentSize.value,
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isRtl: isRtl.value,
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currentScrollOffset: scrollOffset.value,
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isHorizontal: isHorizontal.value
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});
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return;
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}
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}
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}
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}
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function onFocusout(e) {
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isFocused.value = false;
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}
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function onFocus(e) {
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if (!isFocused.value && !(e.relatedTarget && contentRef.value?.contains(e.relatedTarget))) focus();
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}
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function onKeydown(e) {
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if (!contentRef.value) return;
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if (isHorizontal.value) {
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if (e.key === 'ArrowRight') {
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focus(isRtl.value ? 'prev' : 'next');
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} else if (e.key === 'ArrowLeft') {
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focus(isRtl.value ? 'next' : 'prev');
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}
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} else {
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if (e.key === 'ArrowDown') {
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focus('next');
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} else if (e.key === 'ArrowUp') {
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focus('prev');
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}
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}
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if (e.key === 'Home') {
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focus('first');
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} else if (e.key === 'End') {
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focus('last');
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}
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}
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function focus(location) {
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if (!contentRef.value) return;
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if (!location) {
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const focusable = focusableChildren(contentRef.value);
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focusable[0]?.focus();
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} else if (location === 'next') {
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const el = contentRef.value.querySelector(':focus')?.nextElementSibling;
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if (el) el.focus();else focus('first');
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} else if (location === 'prev') {
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const el = contentRef.value.querySelector(':focus')?.previousElementSibling;
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if (el) el.focus();else focus('last');
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} else if (location === 'first') {
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contentRef.value.firstElementChild?.focus();
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} else if (location === 'last') {
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contentRef.value.lastElementChild?.focus();
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}
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}
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function scrollTo(location) {
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const newAbsoluteOffset = scrollOffset.value + (location === 'prev' ? -1 : 1) * containerSize.value;
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scrollOffset.value = clamp(newAbsoluteOffset, 0, contentSize.value - containerSize.value);
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}
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const contentStyles = computed(() => {
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// This adds friction when scrolling the 'wrong' way when at max offset
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let scrollAmount = scrollOffset.value > contentSize.value - containerSize.value ? -(contentSize.value - containerSize.value) + bias(contentSize.value - containerSize.value - scrollOffset.value) : -scrollOffset.value;
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// This adds friction when scrolling the 'wrong' way when at min offset
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if (scrollOffset.value <= 0) {
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scrollAmount = bias(-scrollOffset.value);
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}
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const sign = isRtl.value && isHorizontal.value ? -1 : 1;
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return {
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transform: `translate${isHorizontal.value ? 'X' : 'Y'}(${sign * scrollAmount}px)`,
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transition: disableTransition.value ? 'none' : '',
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willChange: disableTransition.value ? 'transform' : ''
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};
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});
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const slotProps = computed(() => ({
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next: group.next,
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prev: group.prev,
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select: group.select,
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isSelected: group.isSelected
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}));
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const hasAffixes = computed(() => {
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switch (props.showArrows) {
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// Always show arrows on desktop & mobile
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case 'always':
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return true;
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// Always show arrows on desktop
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case 'desktop':
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return !mobile.value;
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// Show arrows on mobile when overflowing.
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// This matches the default 2.2 behavior
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case true:
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return isOverflowing.value || Math.abs(scrollOffset.value) > 0;
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// Always show on mobile
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case 'mobile':
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return mobile.value || isOverflowing.value || Math.abs(scrollOffset.value) > 0;
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// https://material.io/components/tabs#scrollable-tabs
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// Always show arrows when
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// overflowed on desktop
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default:
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return !mobile.value && (isOverflowing.value || Math.abs(scrollOffset.value) > 0);
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}
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});
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const hasPrev = computed(() => {
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return Math.abs(scrollOffset.value) > 0;
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});
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const hasNext = computed(() => {
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// Check one scroll ahead to know the width of right-most item
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return contentSize.value > Math.abs(scrollOffset.value) + containerSize.value;
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});
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useRender(() => _createVNode(props.tag, {
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"class": ['v-slide-group', {
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'v-slide-group--vertical': !isHorizontal.value,
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'v-slide-group--has-affixes': hasAffixes.value,
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'v-slide-group--is-overflowing': isOverflowing.value
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}, displayClasses.value, props.class],
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"style": props.style,
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"tabindex": isFocused.value || group.selected.value.length ? -1 : 0,
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"onFocus": onFocus
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}, {
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default: () => [hasAffixes.value && _createVNode("div", {
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"key": "prev",
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"class": ['v-slide-group__prev', {
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'v-slide-group__prev--disabled': !hasPrev.value
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}],
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"onClick": () => hasPrev.value && scrollTo('prev')
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}, [slots.prev?.(slotProps.value) ?? _createVNode(VFadeTransition, null, {
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default: () => [_createVNode(VIcon, {
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"icon": isRtl.value ? props.nextIcon : props.prevIcon
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}, null)]
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})]), _createVNode("div", {
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"key": "container",
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"ref": containerRef,
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"class": "v-slide-group__container",
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"onScroll": onScroll
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}, [_createVNode("div", {
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"ref": contentRef,
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"class": "v-slide-group__content",
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"style": contentStyles.value,
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"onTouchstartPassive": onTouchstart,
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"onTouchmovePassive": onTouchmove,
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"onTouchendPassive": onTouchend,
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"onFocusin": onFocusin,
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"onFocusout": onFocusout,
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"onKeydown": onKeydown
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}, [slots.default?.(slotProps.value)])]), hasAffixes.value && _createVNode("div", {
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"key": "next",
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"class": ['v-slide-group__next', {
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'v-slide-group__next--disabled': !hasNext.value
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}],
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"onClick": () => hasNext.value && scrollTo('next')
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}, [slots.next?.(slotProps.value) ?? _createVNode(VFadeTransition, null, {
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default: () => [_createVNode(VIcon, {
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"icon": isRtl.value ? props.prevIcon : props.nextIcon
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}, null)]
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})])]
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}));
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return {
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selected: group.selected,
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scrollTo,
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scrollOffset,
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focus
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};
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}
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});
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//# sourceMappingURL=VSlideGroup.mjs.map
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