bootstrap-vue/esm/components/pagination/pagination.js

BootstrapVue, with more than 85 custom components, over 45 plugins, several 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 W

import Vue from '../../utils/vue';
import { getComponentConfig } from '../../utils/config';
import { isVisible } from '../../utils/dom';
import { isUndefinedOrNull } from '../../utils/inspect';
import { mathCeil, mathMax } from '../../utils/math';
import { toInteger } from '../../utils/number';
import paginationMixin from '../../mixins/pagination'; // --- Constants ---

var NAME = 'BPagination';
var DEFAULT_PER_PAGE = 20;
var DEFAULT_TOTAL_ROWS = 0;
var props = {
  size: {
    type: String,
    default: function _default() {
      return getComponentConfig(NAME, 'size');
    }
  },
  perPage: {
    type: [Number, String],
    default: DEFAULT_PER_PAGE
  },
  totalRows: {
    type: [Number, String],
    default: DEFAULT_TOTAL_ROWS
  },
  ariaControls: {
    type: String // default: null

  }
}; // --- Helper functions ---
// Sanitize the provided per page number (converting to a number)

var sanitizePerPage = function sanitizePerPage(val) {
  return mathMax(toInteger(val) || DEFAULT_PER_PAGE, 1);
}; // Sanitize the provided total rows number (converting to a number)


var sanitizeTotalRows = function sanitizeTotalRows(val) {
  return mathMax(toInteger(val) || DEFAULT_TOTAL_ROWS, 0);
}; // The render function is brought in via the `paginationMixin`
// @vue/component


export var BPagination = /*#__PURE__*/Vue.extend({
  name: NAME,
  mixins: [paginationMixin],
  props: props,
  computed: {
    numberOfPages: function numberOfPages() {
      var result = mathCeil(sanitizeTotalRows(this.totalRows) / sanitizePerPage(this.perPage));
      return result < 1 ? 1 : result;
    },
    pageSizeNumberOfPages: function pageSizeNumberOfPages() {
      // Used for watching changes to `perPage` and `numberOfPages`
      return {
        perPage: sanitizePerPage(this.perPage),
        totalRows: sanitizeTotalRows(this.totalRows),
        numberOfPages: this.numberOfPages
      };
    }
  },
  watch: {
    pageSizeNumberOfPages: function pageSizeNumberOfPages(newVal, oldVal) {
      if (!isUndefinedOrNull(oldVal)) {
        if (newVal.perPage !== oldVal.perPage && newVal.totalRows === oldVal.totalRows) {
          // If the page size changes, reset to page 1
          this.currentPage = 1;
        } else if (newVal.numberOfPages !== oldVal.numberOfPages && this.currentPage > newVal.numberOfPages) {
          // If `numberOfPages` changes and is less than
          // the `currentPage` number, reset to page 1
          this.currentPage = 1;
        }
      }

      this.localNumberOfPages = newVal.numberOfPages;
    }
  },
  created: function created() {
    var _this = this;

    // Set the initial page count
    this.localNumberOfPages = this.numberOfPages; // Set the initial page value

    var currentPage = toInteger(this.value, 0);

    if (currentPage > 0) {
      this.currentPage = currentPage;
    } else {
      this.$nextTick(function () {
        // If this value parses to NaN or a value less than 1
        // Trigger an initial emit of 'null' if no page specified
        _this.currentPage = 0;
      });
    }
  },
  mounted: function mounted() {
    // Set the initial page count
    this.localNumberOfPages = this.numberOfPages;
  },
  methods: {
    // These methods are used by the render function
    onClick: function onClick(num, evt) {
      var _this2 = this;

      // Handle edge cases where number of pages has changed (i.e. if perPage changes)
      // This should normally not happen, but just in case.
      if (num > this.numberOfPages) {
        /* istanbul ignore next */
        num = this.numberOfPages;
      } else if (num < 1) {
        /* istanbul ignore next */
        num = 1;
      } // Update the v-model


      this.currentPage = num; // Emit event triggered by user interaction

      this.$emit('change', this.currentPage);
      this.$nextTick(function () {
        // Keep the current button focused if possible
        var target = evt.target;

        if (isVisible(target) && _this2.$el.contains(target) && target.focus) {
          target.focus();
        } else {
          _this2.focusCurrent();
        }
      });
    },
    makePage: function makePage(pageNum) {
      return pageNum;
    },

    /* istanbul ignore next */
    linkProps: function linkProps() {
      // No props, since we render a plain button

      /* istanbul ignore next */
      return {};
    }
  }
});