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Image.tsx
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Image.tsx
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/**
* @license
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/IDuxFE/idux/blob/main/LICENSE
*/
import type { ImageProps, ImageStatus } from './types'
import type { ImageConfig } from '@idux/components/config'
import type { CSSProperties, ComputedRef, Ref, Slots } from 'vue'
import { computed, defineComponent, normalizeClass, ref, watch } from 'vue'
import { callEmit } from '@idux/cdk/utils'
import { useGlobalConfig } from '@idux/components/config'
import { IxIcon } from '@idux/components/icon'
import ImageViewer from './ImageViewer'
import { imageProps } from './types'
export default defineComponent({
name: 'IxImage',
inheritAttrs: false,
props: imageProps,
setup(props, { attrs, slots }) {
const { class: className, style, ...rest } = attrs
const common = useGlobalConfig('common')
const mergedPrefixCls = computed(() => `${common.prefixCls}-image`)
const config = useGlobalConfig('image')
const preview = usePreview(props, config)
const { status, setFailed, setLoaded } = useStatus(props)
const [viewerVisible, setVisible] = useViewerVisible()
const { outerClasses, overLayerClasses, imageClasses } = useClasses(
mergedPrefixCls,
className as string,
status,
preview,
)
return () => {
const imageViewerProps = {
visible: viewerVisible.value,
'onUpdate:visible': setVisible,
images: [props.src],
...(props.imageViewer ?? {}),
}
return (
<div class={outerClasses.value} style={style as CSSProperties}>
<div class={overLayerClasses.value}>
{renderPreviewIcon(props, slots, mergedPrefixCls, status, preview, setVisible)}
{renderPlaceholder(slots, mergedPrefixCls, status)}
{renderFallback(slots, mergedPrefixCls, status)}
<ImageViewer {...imageViewerProps}></ImageViewer>
</div>
<img {...rest} src={props.src} class={imageClasses.value} onLoad={setLoaded} onError={setFailed} />
</div>
)
}
},
})
function renderPreviewIcon(
props: ImageProps,
slots: Slots,
mergedPrefixCls: ComputedRef<string>,
status: Ref<ImageStatus>,
preview: ComputedRef<boolean>,
setVisible: (visible: boolean) => void,
) {
return (
status.value === 'loaded' &&
preview.value && (
<span class={`${mergedPrefixCls.value}-preview-wrapper`} onClick={() => setVisible(true)}>
{slots.previewIcon?.() ?? <IxIcon class={`${mergedPrefixCls.value}-preview-icon`} name="zoom-in" />}
</span>
)
)
}
function renderPlaceholder(slots: Slots, mergedPrefixCls: ComputedRef<string>, status: Ref<ImageStatus>) {
return (
status.value === 'loading' &&
(slots.placeholder?.() ?? <IxIcon class={`${mergedPrefixCls.value}-placeholder`} name="loading" />)
)
}
function renderFallback(slots: Slots, mergedPrefixCls: ComputedRef<string>, status: Ref<ImageStatus>) {
return (
status.value === 'failed' &&
(slots.fallback?.() ?? <IxIcon class={`${mergedPrefixCls.value}-fallback`} name="file-image" />)
)
}
function useViewerVisible(): [Ref<boolean>, (visible: boolean) => void] {
const viewerVisible = ref(false)
const setVisible = (visible: boolean) => {
viewerVisible.value = visible
}
return [viewerVisible, setVisible]
}
function useClasses(
mergedPrefixCls: ComputedRef<string>,
className: string,
status: Ref<ImageStatus>,
preview: ComputedRef<boolean>,
) {
const outerClasses = computed(() =>
normalizeClass([
mergedPrefixCls.value,
className,
`${mergedPrefixCls.value}-${status.value}`,
{ [`${mergedPrefixCls.value}-preview`]: preview.value },
]),
)
const overLayerClasses = computed(() => normalizeClass(`${mergedPrefixCls.value}-layer`))
const imageClasses = computed(() =>
normalizeClass([
`${mergedPrefixCls.value}-inner`,
{ [`${mergedPrefixCls.value}-inner-hidden`]: status.value !== 'loaded' },
]),
)
return {
outerClasses,
overLayerClasses,
imageClasses,
}
}
function usePreview(props: ImageProps, config: ImageConfig) {
return computed(() => props.preview ?? config.preview)
}
function useStatus(props: ImageProps) {
const status: Ref<ImageStatus> = ref('loading')
const setLoaded = (e: Event) => {
status.value = 'loaded'
callEmit(props.onLoad, e)
}
const setFailed = (e: Event) => {
status.value = 'failed'
callEmit(props.onError, e)
}
watch(
() => props.src,
() => {
status.value = 'loading'
},
{ immediate: true },
)
return {
status,
setLoaded,
setFailed,
}
}