Cheng Zhou
490 lines
18 KiB
JavaScript
490 lines
18 KiB
JavaScript
import { defineComponent, markRaw, ref, effectScope, computed, shallowRef, watch, nextTick, onMounted, openBlock, createBlock, unref, withCtx, createVNode, Transition, createElementVNode, normalizeClass, normalizeStyle, withModifiers, createCommentVNode, createElementBlock, Fragment, renderSlot, createTextVNode, toDisplayString, resolveDynamicComponent } from 'vue';
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import { clamp, useEventListener } from '@vueuse/core';
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import { throttle } from 'lodash-unified';
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import ElFocusTrap from '../../focus-trap/src/focus-trap.mjs';
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import { ElTeleport } from '../../teleport/index.mjs';
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import { ElIcon } from '../../icon/index.mjs';
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import { FullScreen, ScaleToOriginal, Close, ArrowLeft, ArrowRight, ZoomOut, ZoomIn, RefreshLeft, RefreshRight } from '@element-plus/icons-vue';
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import { imageViewerProps, imageViewerEmits } from './image-viewer.mjs';
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import _export_sfc from '../../../_virtual/plugin-vue_export-helper.mjs';
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import { useLocale } from '../../../hooks/use-locale/index.mjs';
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import { useNamespace } from '../../../hooks/use-namespace/index.mjs';
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import { useZIndex } from '../../../hooks/use-z-index/index.mjs';
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import { useLockscreen } from '../../../hooks/use-lockscreen/index.mjs';
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import { getEventCode } from '../../../utils/dom/event.mjs';
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import { EVENT_CODE } from '../../../constants/aria.mjs';
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import { keysOf } from '../../../utils/objects.mjs';
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const __default__ = defineComponent({
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name: "ElImageViewer"
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});
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const _sfc_main = /* @__PURE__ */ defineComponent({
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...__default__,
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props: imageViewerProps,
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emits: imageViewerEmits,
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setup(__props, { expose, emit }) {
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var _a;
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const props = __props;
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const modes = {
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CONTAIN: {
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name: "contain",
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icon: markRaw(FullScreen)
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},
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ORIGINAL: {
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name: "original",
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icon: markRaw(ScaleToOriginal)
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}
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};
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let stopWheelListener;
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const { t } = useLocale();
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const ns = useNamespace("image-viewer");
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const { nextZIndex } = useZIndex();
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const wrapper = ref();
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const imgRef = ref();
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const scopeEventListener = effectScope();
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const scaleClamped = computed(() => {
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const { scale, minScale, maxScale } = props;
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return clamp(scale, minScale, maxScale);
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});
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const loading = ref(true);
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const loadError = ref(false);
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const visible = ref(false);
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const activeIndex = ref(props.initialIndex);
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const mode = shallowRef(modes.CONTAIN);
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const transform = ref({
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scale: scaleClamped.value,
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deg: 0,
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offsetX: 0,
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offsetY: 0,
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enableTransition: false
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});
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const zIndex = ref((_a = props.zIndex) != null ? _a : nextZIndex());
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useLockscreen(visible, { ns });
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const isSingle = computed(() => {
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const { urlList } = props;
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return urlList.length <= 1;
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});
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const isFirst = computed(() => activeIndex.value === 0);
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const isLast = computed(() => activeIndex.value === props.urlList.length - 1);
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const currentImg = computed(() => props.urlList[activeIndex.value]);
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const arrowPrevKls = computed(() => [
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ns.e("btn"),
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ns.e("prev"),
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ns.is("disabled", !props.infinite && isFirst.value)
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]);
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const arrowNextKls = computed(() => [
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ns.e("btn"),
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ns.e("next"),
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ns.is("disabled", !props.infinite && isLast.value)
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]);
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const imgStyle = computed(() => {
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const { scale, deg, offsetX, offsetY, enableTransition } = transform.value;
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let translateX = offsetX / scale;
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let translateY = offsetY / scale;
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const radian = deg * Math.PI / 180;
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const cosRadian = Math.cos(radian);
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const sinRadian = Math.sin(radian);
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translateX = translateX * cosRadian + translateY * sinRadian;
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translateY = translateY * cosRadian - offsetX / scale * sinRadian;
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const style = {
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transform: `scale(${scale}) rotate(${deg}deg) translate(${translateX}px, ${translateY}px)`,
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transition: enableTransition ? "transform .3s" : ""
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};
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if (mode.value.name === modes.CONTAIN.name) {
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style.maxWidth = style.maxHeight = "100%";
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}
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return style;
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});
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const progress = computed(() => `${activeIndex.value + 1} / ${props.urlList.length}`);
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function hide() {
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unregisterEventListener();
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stopWheelListener == null ? void 0 : stopWheelListener();
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visible.value = false;
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emit("close");
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}
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function registerEventListener() {
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const keydownHandler = throttle((e) => {
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const code = getEventCode(e);
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switch (code) {
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case EVENT_CODE.esc:
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props.closeOnPressEscape && hide();
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break;
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case EVENT_CODE.space:
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toggleMode();
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break;
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case EVENT_CODE.left:
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prev();
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break;
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case EVENT_CODE.up:
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handleActions("zoomIn");
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break;
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case EVENT_CODE.right:
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next();
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break;
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case EVENT_CODE.down:
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handleActions("zoomOut");
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break;
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}
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});
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const mousewheelHandler = throttle((e) => {
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const delta = e.deltaY || e.deltaX;
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handleActions(delta < 0 ? "zoomIn" : "zoomOut", {
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zoomRate: props.zoomRate,
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enableTransition: false
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});
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});
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scopeEventListener.run(() => {
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useEventListener(document, "keydown", keydownHandler);
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useEventListener(wrapper, "wheel", mousewheelHandler);
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});
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}
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function unregisterEventListener() {
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scopeEventListener.stop();
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}
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function handleImgLoad() {
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loading.value = false;
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}
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function handleImgError(e) {
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loadError.value = true;
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loading.value = false;
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emit("error", e);
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e.target.alt = t("el.image.error");
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}
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function handleMouseDown(e) {
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if (loading.value || e.button !== 0 || !wrapper.value)
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return;
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transform.value.enableTransition = false;
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const { offsetX, offsetY } = transform.value;
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const startX = e.pageX;
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const startY = e.pageY;
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const dragHandler = throttle((ev) => {
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transform.value = {
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...transform.value,
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offsetX: offsetX + ev.pageX - startX,
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offsetY: offsetY + ev.pageY - startY
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};
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});
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const removeMousemove = useEventListener(document, "mousemove", dragHandler);
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const removeMouseup = useEventListener(document, "mouseup", () => {
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removeMousemove();
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removeMouseup();
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});
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e.preventDefault();
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}
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function handleTouchStart(e) {
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if (loading.value || !wrapper.value || e.touches.length !== 1)
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return;
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transform.value.enableTransition = false;
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const { offsetX, offsetY } = transform.value;
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const { pageX: startX, pageY: startY } = e.touches[0];
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const dragHandler = throttle((ev) => {
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const targetTouch = ev.touches[0];
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transform.value = {
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...transform.value,
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offsetX: offsetX + targetTouch.pageX - startX,
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offsetY: offsetY + targetTouch.pageY - startY
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};
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});
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const removeTouchmove = useEventListener(document, "touchmove", dragHandler);
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const removeTouchend = useEventListener(document, "touchend", () => {
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removeTouchmove();
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removeTouchend();
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});
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e.preventDefault();
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}
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function reset() {
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transform.value = {
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scale: scaleClamped.value,
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deg: 0,
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offsetX: 0,
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offsetY: 0,
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enableTransition: false
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};
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}
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function toggleMode() {
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if (loading.value || loadError.value)
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return;
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const modeNames = keysOf(modes);
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const modeValues = Object.values(modes);
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const currentMode = mode.value.name;
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const index = modeValues.findIndex((i) => i.name === currentMode);
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const nextIndex = (index + 1) % modeNames.length;
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mode.value = modes[modeNames[nextIndex]];
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reset();
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}
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function setActiveItem(index) {
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loadError.value = false;
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const len = props.urlList.length;
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activeIndex.value = (index + len) % len;
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}
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function prev() {
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if (isFirst.value && !props.infinite)
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return;
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setActiveItem(activeIndex.value - 1);
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}
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function next() {
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if (isLast.value && !props.infinite)
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return;
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setActiveItem(activeIndex.value + 1);
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}
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function handleActions(action, options = {}) {
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if (loading.value || loadError.value)
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return;
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const { minScale, maxScale } = props;
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const { zoomRate, rotateDeg, enableTransition } = {
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zoomRate: props.zoomRate,
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rotateDeg: 90,
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enableTransition: true,
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...options
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};
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switch (action) {
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case "zoomOut":
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if (transform.value.scale > minScale) {
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transform.value.scale = Number.parseFloat((transform.value.scale / zoomRate).toFixed(3));
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}
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break;
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case "zoomIn":
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if (transform.value.scale < maxScale) {
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transform.value.scale = Number.parseFloat((transform.value.scale * zoomRate).toFixed(3));
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}
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break;
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case "clockwise":
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transform.value.deg += rotateDeg;
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emit("rotate", transform.value.deg);
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break;
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case "anticlockwise":
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transform.value.deg -= rotateDeg;
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emit("rotate", transform.value.deg);
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break;
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}
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transform.value.enableTransition = enableTransition;
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}
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function onFocusoutPrevented(event) {
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var _a2;
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if (((_a2 = event.detail) == null ? void 0 : _a2.focusReason) === "pointer") {
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event.preventDefault();
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}
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}
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function onCloseRequested() {
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if (props.closeOnPressEscape) {
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hide();
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}
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}
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function wheelHandler(e) {
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if (!e.ctrlKey)
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return;
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if (e.deltaY < 0) {
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e.preventDefault();
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return false;
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} else if (e.deltaY > 0) {
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e.preventDefault();
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return false;
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}
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}
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watch(() => scaleClamped.value, (val) => {
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transform.value.scale = val;
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});
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watch(currentImg, () => {
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nextTick(() => {
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const $img = imgRef.value;
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if (!($img == null ? void 0 : $img.complete)) {
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loading.value = true;
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}
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});
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});
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watch(activeIndex, (val) => {
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reset();
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emit("switch", val);
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});
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onMounted(() => {
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visible.value = true;
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registerEventListener();
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stopWheelListener = useEventListener("wheel", wheelHandler, {
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passive: false
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});
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});
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expose({
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setActiveItem
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});
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return (_ctx, _cache) => {
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return openBlock(), createBlock(unref(ElTeleport), {
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to: "body",
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disabled: !_ctx.teleported
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}, {
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default: withCtx(() => [
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createVNode(Transition, {
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name: "viewer-fade",
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appear: ""
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}, {
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default: withCtx(() => [
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createElementVNode("div", {
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ref_key: "wrapper",
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ref: wrapper,
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tabindex: -1,
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class: normalizeClass(unref(ns).e("wrapper")),
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style: normalizeStyle({ zIndex: zIndex.value })
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}, [
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createVNode(unref(ElFocusTrap), {
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loop: "",
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trapped: "",
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"focus-trap-el": wrapper.value,
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"focus-start-el": "container",
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onFocusoutPrevented,
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onReleaseRequested: onCloseRequested
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}, {
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default: withCtx(() => [
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createElementVNode("div", {
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class: normalizeClass(unref(ns).e("mask")),
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onClick: withModifiers(($event) => _ctx.hideOnClickModal && hide(), ["self"])
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}, null, 10, ["onClick"]),
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createCommentVNode(" CLOSE "),
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createElementVNode("span", {
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class: normalizeClass([unref(ns).e("btn"), unref(ns).e("close")]),
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onClick: hide
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}, [
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createVNode(unref(ElIcon), null, {
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default: withCtx(() => [
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createVNode(unref(Close))
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]),
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_: 1
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})
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], 2),
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createCommentVNode(" ARROW "),
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!unref(isSingle) ? (openBlock(), createElementBlock(Fragment, { key: 0 }, [
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createElementVNode("span", {
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class: normalizeClass(unref(arrowPrevKls)),
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onClick: prev
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}, [
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createVNode(unref(ElIcon), null, {
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default: withCtx(() => [
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createVNode(unref(ArrowLeft))
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]),
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_: 1
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})
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], 2),
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createElementVNode("span", {
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class: normalizeClass(unref(arrowNextKls)),
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onClick: next
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}, [
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createVNode(unref(ElIcon), null, {
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default: withCtx(() => [
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createVNode(unref(ArrowRight))
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]),
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_: 1
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})
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], 2)
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], 64)) : createCommentVNode("v-if", true),
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_ctx.$slots.progress || _ctx.showProgress ? (openBlock(), createElementBlock("div", {
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key: 1,
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class: normalizeClass([unref(ns).e("btn"), unref(ns).e("progress")])
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}, [
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renderSlot(_ctx.$slots, "progress", {
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activeIndex: activeIndex.value,
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total: _ctx.urlList.length
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}, () => [
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createTextVNode(toDisplayString(unref(progress)), 1)
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])
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], 2)) : createCommentVNode("v-if", true),
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createCommentVNode(" ACTIONS "),
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createElementVNode("div", {
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class: normalizeClass([unref(ns).e("btn"), unref(ns).e("actions")])
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}, [
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createElementVNode("div", {
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class: normalizeClass(unref(ns).e("actions__inner"))
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}, [
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renderSlot(_ctx.$slots, "toolbar", {
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actions: handleActions,
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prev,
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next,
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reset: toggleMode,
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activeIndex: activeIndex.value,
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setActiveItem
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}, () => [
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createVNode(unref(ElIcon), {
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onClick: ($event) => handleActions("zoomOut")
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}, {
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default: withCtx(() => [
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createVNode(unref(ZoomOut))
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]),
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_: 1
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}, 8, ["onClick"]),
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createVNode(unref(ElIcon), {
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onClick: ($event) => handleActions("zoomIn")
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}, {
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default: withCtx(() => [
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createVNode(unref(ZoomIn))
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]),
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_: 1
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}, 8, ["onClick"]),
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createElementVNode("i", {
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class: normalizeClass(unref(ns).e("actions__divider"))
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}, null, 2),
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createVNode(unref(ElIcon), { onClick: toggleMode }, {
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default: withCtx(() => [
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(openBlock(), createBlock(resolveDynamicComponent(unref(mode).icon)))
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]),
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_: 1
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}),
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createElementVNode("i", {
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class: normalizeClass(unref(ns).e("actions__divider"))
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}, null, 2),
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createVNode(unref(ElIcon), {
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onClick: ($event) => handleActions("anticlockwise")
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}, {
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default: withCtx(() => [
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createVNode(unref(RefreshLeft))
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]),
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_: 1
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}, 8, ["onClick"]),
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createVNode(unref(ElIcon), {
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onClick: ($event) => handleActions("clockwise")
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}, {
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default: withCtx(() => [
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createVNode(unref(RefreshRight))
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]),
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_: 1
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}, 8, ["onClick"])
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])
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], 2)
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], 2),
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createCommentVNode(" CANVAS "),
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createElementVNode("div", {
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class: normalizeClass(unref(ns).e("canvas"))
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}, [
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loadError.value && _ctx.$slots["viewer-error"] ? renderSlot(_ctx.$slots, "viewer-error", {
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key: 0,
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activeIndex: activeIndex.value,
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src: unref(currentImg)
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}) : (openBlock(), createElementBlock("img", {
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ref_key: "imgRef",
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ref: imgRef,
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key: unref(currentImg),
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src: unref(currentImg),
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style: normalizeStyle(unref(imgStyle)),
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class: normalizeClass(unref(ns).e("img")),
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crossorigin: _ctx.crossorigin,
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onLoad: handleImgLoad,
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onError: handleImgError,
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onMousedown: handleMouseDown,
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onTouchstart: handleTouchStart
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}, null, 46, ["src", "crossorigin"]))
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], 2),
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renderSlot(_ctx.$slots, "default")
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]),
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_: 3
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}, 8, ["focus-trap-el"])
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], 6)
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]),
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_: 3
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})
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]),
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_: 3
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}, 8, ["disabled"]);
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};
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}
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});
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var ImageViewer = /* @__PURE__ */ _export_sfc(_sfc_main, [["__file", "image-viewer.vue"]]);
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export { ImageViewer as default };
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//# sourceMappingURL=image-viewer2.mjs.map
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