{"version":3,"file":"image-viewer2.js","sources":["../../../../../../packages/components/image-viewer/src/image-viewer.vue"],"sourcesContent":["<template>\n <el-teleport to=\"body\" :disabled=\"!teleported\">\n <transition name=\"viewer-fade\" appear>\n <div\n ref=\"wrapper\"\n :tabindex=\"-1\"\n :class=\"ns.e('wrapper')\"\n :style=\"{ zIndex }\"\n >\n <div :class=\"ns.e('mask')\" @click.self=\"hideOnClickModal && hide()\" />\n\n <!-- CLOSE -->\n <span :class=\"[ns.e('btn'), ns.e('close')]\" @click=\"hide\">\n <el-icon>\n <Close />\n </el-icon>\n </span>\n\n <!-- ARROW -->\n <template v-if=\"!isSingle\">\n <span :class=\"arrowPrevKls\" @click=\"prev\">\n <el-icon>\n <ArrowLeft />\n </el-icon>\n </span>\n <span :class=\"arrowNextKls\" @click=\"next\">\n <el-icon>\n <ArrowRight />\n </el-icon>\n </span>\n </template>\n <!-- ACTIONS -->\n <div :class=\"[ns.e('btn'), ns.e('actions')]\">\n <div :class=\"ns.e('actions__inner')\">\n <el-icon @click=\"handleActions('zoomOut')\">\n <ZoomOut />\n </el-icon>\n <el-icon @click=\"handleActions('zoomIn')\">\n <ZoomIn />\n </el-icon>\n <i :class=\"ns.e('actions__divider')\" />\n <el-icon @click=\"toggleMode\">\n <component :is=\"mode.icon\" />\n </el-icon>\n <i :class=\"ns.e('actions__divider')\" />\n <el-icon @click=\"handleActions('anticlockwise')\">\n <RefreshLeft />\n </el-icon>\n <el-icon @click=\"handleActions('clockwise')\">\n <RefreshRight />\n </el-icon>\n </div>\n </div>\n <!-- CANVAS -->\n <div :class=\"ns.e('canvas')\">\n <img\n v-for=\"(url, i) in urlList\"\n v-show=\"i === activeIndex\"\n :ref=\"(el) => (imgRefs[i] = el as HTMLImageElement)\"\n :key=\"url\"\n :src=\"url\"\n :style=\"imgStyle\"\n :class=\"ns.e('img')\"\n :crossorigin=\"crossorigin\"\n @load=\"handleImgLoad\"\n @error=\"handleImgError\"\n @mousedown=\"handleMouseDown\"\n />\n </div>\n <slot />\n </div>\n </transition>\n </el-teleport>\n</template>\n\n<script lang=\"ts\" setup>\nimport {\n computed,\n effectScope,\n markRaw,\n nextTick,\n onMounted,\n ref,\n shallowRef,\n watch,\n} from 'vue'\nimport { useEventListener } from '@vueuse/core'\nimport { throttle } from 'lodash-unified'\nimport { useLocale, useNamespace, useZIndex } from '@element-plus/hooks'\nimport { EVENT_CODE } from '@element-plus/constants'\nimport { keysOf } from '@element-plus/utils'\nimport ElTeleport from '@element-plus/components/teleport'\nimport ElIcon from '@element-plus/components/icon'\nimport {\n ArrowLeft,\n ArrowRight,\n Close,\n FullScreen,\n RefreshLeft,\n RefreshRight,\n ScaleToOriginal,\n ZoomIn,\n ZoomOut,\n} from '@element-plus/icons-vue'\nimport { imageViewerEmits, imageViewerProps } from './image-viewer'\n\nimport type { CSSProperties } from 'vue'\nimport type { ImageViewerAction, ImageViewerMode } from './image-viewer'\n\nconst modes: Record<'CONTAIN' | 'ORIGINAL', ImageViewerMode> = {\n CONTAIN: {\n name: 'contain',\n icon: markRaw(FullScreen),\n },\n ORIGINAL: {\n name: 'original',\n icon: markRaw(ScaleToOriginal),\n },\n}\n\ndefineOptions({\n name: 'ElImageViewer',\n})\n\nconst props = defineProps(imageViewerProps)\nconst emit = defineEmits(imageViewerEmits)\n\nconst { t } = useLocale()\nconst ns = useNamespace('image-viewer')\nconst { nextZIndex } = useZIndex()\nconst wrapper = ref<HTMLDivElement>()\nconst imgRefs = ref<HTMLImageElement[]>([])\n\nconst scopeEventListener = effectScope()\n\nconst loading = ref(true)\nconst activeIndex = ref(props.initialIndex)\nconst mode = shallowRef<ImageViewerMode>(modes.CONTAIN)\nconst transform = ref({\n scale: 1,\n deg: 0,\n offsetX: 0,\n offsetY: 0,\n enableTransition: false,\n})\nconst zIndex = ref(props.zIndex ?? nextZIndex())\n\nconst isSingle = computed(() => {\n const { urlList } = props\n return urlList.length <= 1\n})\n\nconst isFirst = computed(() => {\n return activeIndex.value === 0\n})\n\nconst isLast = computed(() => {\n return activeIndex.value === props.urlList.length - 1\n})\n\nconst currentImg = computed(() => {\n return props.urlList[activeIndex.value]\n})\n\nconst arrowPrevKls = computed(() => [\n ns.e('btn'),\n ns.e('prev'),\n ns.is('disabled', !props.infinite && isFirst.value),\n])\n\nconst arrowNextKls = computed(() => [\n ns.e('btn'),\n ns.e('next'),\n ns.is('disabled', !props.infinite && isLast.value),\n])\n\nconst imgStyle = computed(() => {\n const { scale, deg, offsetX, offsetY, enableTransition } = transform.value\n let translateX = offsetX / scale\n let translateY = offsetY / scale\n\n const radian = (deg * Math.PI) / 180\n const cosRadian = Math.cos(radian)\n const sinRadian = Math.sin(radian)\n translateX = translateX * cosRadian + translateY * sinRadian\n translateY = translateY * cosRadian - (offsetX / scale) * sinRadian\n\n const style: CSSProperties = {\n transform: `scale(${scale}) rotate(${deg}deg) translate(${translateX}px, ${translateY}px)`,\n transition: enableTransition ? 'transform .3s' : '',\n }\n if (mode.value.name === modes.CONTAIN.name) {\n style.maxWidth = style.maxHeight = '100%'\n }\n return style\n})\n\nfunction hide() {\n unregisterEventListener()\n emit('close')\n}\n\nfunction registerEventListener() {\n const keydownHandler = throttle((e: KeyboardEvent) => {\n switch (e.code) {\n // ESC\n case EVENT_CODE.esc:\n props.closeOnPressEscape && hide()\n break\n // SPACE\n case EVENT_CODE.space:\n toggleMode()\n break\n // LEFT_ARROW\n case EVENT_CODE.left:\n prev()\n break\n // UP_ARROW\n case EVENT_CODE.up:\n handleActions('zoomIn')\n break\n // RIGHT_ARROW\n case EVENT_CODE.right:\n next()\n break\n // DOWN_ARROW\n case EVENT_CODE.down:\n handleActions('zoomOut')\n break\n }\n })\n const mousewheelHandler = throttle((e: WheelEvent) => {\n const delta = e.deltaY || e.deltaX\n handleActions(delta < 0 ? 'zoomIn' : 'zoomOut', {\n zoomRate: props.zoomRate,\n enableTransition: false,\n })\n })\n\n scopeEventListener.run(() => {\n useEventListener(document, 'keydown', keydownHandler)\n useEventListener(document, 'wheel', mousewheelHandler)\n })\n}\n\nfunction unregisterEventListener() {\n scopeEventListener.stop()\n}\n\nfunction handleImgLoad() {\n loading.value = false\n}\n\nfunction handleImgError(e: Event) {\n loading.value = false\n ;(e.target as HTMLImageElement).alt = t('el.image.error')\n}\n\nfunction handleMouseDown(e: MouseEvent) {\n if (loading.value || e.button !== 0 || !wrapper.value) return\n transform.value.enableTransition = false\n\n const { offsetX, offsetY } = transform.value\n const startX = e.pageX\n const startY = e.pageY\n\n const dragHandler = throttle((ev: MouseEvent) => {\n transform.value = {\n ...transform.value,\n offsetX: offsetX + ev.pageX - startX,\n offsetY: offsetY + ev.pageY - startY,\n }\n })\n const removeMousemove = useEventListener(document, 'mousemove', dragHandler)\n useEventListener(document, 'mouseup', () => {\n removeMousemove()\n })\n\n e.preventDefault()\n}\n\nfunction reset() {\n transform.value = {\n scale: 1,\n deg: 0,\n offsetX: 0,\n offsetY: 0,\n enableTransition: false,\n }\n}\n\nfunction toggleMode() {\n if (loading.value) return\n\n const modeNames = keysOf(modes)\n const modeValues = Object.values(modes)\n const currentMode = mode.value.name\n const index = modeValues.findIndex((i) => i.name === currentMode)\n const nextIndex = (index + 1) % modeNames.length\n mode.value = modes[modeNames[nextIndex]]\n reset()\n}\n\nfunction setActiveItem(index: number) {\n const len = props.urlList.length\n activeIndex.value = (index + len) % len\n}\n\nfunction prev() {\n if (isFirst.value && !props.infinite) return\n setActiveItem(activeIndex.value - 1)\n}\n\nfunction next() {\n if (isLast.value && !props.infinite) return\n setActiveItem(activeIndex.value + 1)\n}\n\nfunction handleActions(action: ImageViewerAction, options = {}) {\n if (loading.value) return\n const { minScale, maxScale } = props\n const { zoomRate, rotateDeg, enableTransition } = {\n zoomRate: props.zoomRate,\n rotateDeg: 90,\n enableTransition: true,\n ...options,\n }\n switch (action) {\n case 'zoomOut':\n if (transform.value.scale > minScale) {\n transform.value.scale = Number.parseFloat(\n (transform.value.scale / zoomRate).toFixed(3)\n )\n }\n break\n case 'zoomIn':\n if (transform.value.scale < maxScale) {\n transform.value.scale = Number.parseFloat(\n (transform.value.scale * zoomRate).toFixed(3)\n )\n }\n break\n case 'clockwise':\n transform.value.deg += rotateDeg\n emit('rotate', transform.value.deg)\n break\n case 'anticlockwise':\n transform.value.deg -= rotateDeg\n emit('rotate', transform.value.deg)\n break\n }\n transform.value.enableTransition = enableTransition\n}\n\nwatch(currentImg, () => {\n nextTick(() => {\n const $img = imgRefs.value[0]\n if (!$img?.complete) {\n loading.value = true\n }\n 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