bootstrap-vue/src/components/carousel/carousel-slide.js

BootstrapVue, with over 40 plugins and more than 80 custom components, custom directives, and over 300 icons, provides one of the most comprehensive implementations of Bootstrap v4 components and grid system for Vue.js. With extensive and automated WAI-AR

import Vue from '../../utils/vue'
import idMixin from '../../mixins/id'
import normalizeSlotMixin from '../../mixins/normalize-slot'
import { hasTouchSupport } from '../../utils/env'
import { htmlOrText } from '../../utils/html'
import { BImg } from '../image/img'

export const props = {
  imgSrc: {
    type: String
    // default: undefined
  },
  imgAlt: {
    type: String
    // default: undefined
  },
  imgWidth: {
    type: [Number, String]
    // default: undefined
  },
  imgHeight: {
    type: [Number, String]
    // default: undefined
  },
  imgBlank: {
    type: Boolean,
    default: false
  },
  imgBlankColor: {
    type: String,
    default: 'transparent'
  },
  contentVisibleUp: {
    type: String
  },
  contentTag: {
    type: String,
    default: 'div'
  },
  caption: {
    type: String
  },
  captionHtml: {
    type: String
  },
  captionTag: {
    type: String,
    default: 'h3'
  },
  text: {
    type: String
  },
  textHtml: {
    type: String
  },
  textTag: {
    type: String,
    default: 'p'
  },
  background: {
    type: String
  }
}

// @vue/component
export const BCarouselSlide = /*#__PURE__*/ Vue.extend({
  name: 'BCarouselSlide',
  mixins: [idMixin, normalizeSlotMixin],
  inject: {
    bvCarousel: {
      default() {
        return {
          // Explicitly disable touch if not a child of carousel
          noTouch: true
        }
      }
    }
  },
  props,
  computed: {
    contentClasses() {
      return [
        this.contentVisibleUp ? 'd-none' : '',
        this.contentVisibleUp ? `d-${this.contentVisibleUp}-block` : ''
      ]
    },
    computedWidth() {
      // Use local width, or try parent width
      return this.imgWidth || this.bvCarousel.imgWidth || null
    },
    computedHeight() {
      // Use local height, or try parent height
      return this.imgHeight || this.bvCarousel.imgHeight || null
    }
  },
  render(h) {
    const noDrag = !this.bvCarousel.noTouch && hasTouchSupport

    let img = this.normalizeSlot('img')
    if (!img && (this.imgSrc || this.imgBlank)) {
      img = h(BImg, {
        props: {
          fluidGrow: true,
          block: true,
          src: this.imgSrc,
          blank: this.imgBlank,
          blankColor: this.imgBlankColor,
          width: this.computedWidth,
          height: this.computedHeight,
          alt: this.imgAlt
        },
        // Touch support event handler
        on: noDrag
          ? {
              dragstart: e => {
                /* istanbul ignore next: difficult to test in JSDOM */
                e.preventDefault()
              }
            }
          : {}
      })
    }
    if (!img) {
      img = h()
    }

    let content = h()

    const contentChildren = [
      this.caption || this.captionHtml
        ? h(this.captionTag, {
            domProps: htmlOrText(this.captionHtml, this.caption)
          })
        : false,
      this.text || this.textHtml
        ? h(this.textTag, { domProps: htmlOrText(this.textHtml, this.text) })
        : false,
      this.normalizeSlot('default') || false
    ]

    if (contentChildren.some(Boolean)) {
      content = h(
        this.contentTag,
        { staticClass: 'carousel-caption', class: this.contentClasses },
        contentChildren.map(i => i || h())
      )
    }

    return h(
      'div',
      {
        staticClass: 'carousel-item',
        style: { background: this.background || this.bvCarousel.background || null },
        attrs: { id: this.safeId(), role: 'listitem' }
      },
      [img, content]
    )
  }
})