bootstrap-vue/es/directives/popover/popover.js

BootstrapVue provides one of the most comprehensive implementations of Bootstrap 4 components and grid system for Vue.js and with extensive and automated WAI-ARIA accessibility markup.

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

import Popper from 'popper.js';
import PopOver from '../../utils/popover.class';
import { assign, keys } from '../../utils/object';
import warn from '../../utils/warn';

var inBrowser = typeof window !== 'undefined' && typeof document !== 'undefined';

// Key which we use to store tooltip object on element
var BVPO = '__BV_PopOver__';

// Valid event triggers
var validTriggers = {
  'focus': true,
  'hover': true,
  'click': true,
  'blur': true

  // Build a PopOver config based on bindings (if any)
  // Arguments and modifiers take precedence over pased value config object
  /* istanbul ignore next: not easy to test */
};function parseBindings(bindings) {
  // We start out with a blank config
  var config = {};

  // Process bindings.value
  if (typeof bindings.value === 'string') {
    // Value is popover content (html optionally supported)
    config.content = bindings.value;
  } else if (typeof bindings.value === 'function') {
    // Content generator function
    config.content = bindings.value;
  } else if (_typeof(bindings.value) === 'object') {
    // Value is config object, so merge
    config = assign(bindings.value);
  }

  // If Argument, assume element ID of container element
  if (bindings.arg) {
    // Element ID specified as arg. We must prepend '#' to become a CSS selector
    config.container = '#' + bindings.arg;
  }

  // Process modifiers
  keys(bindings.modifiers).forEach(function (mod) {
    if (/^html$/.test(mod)) {
      // Title allows HTML
      config.html = true;
    } else if (/^nofade$/.test(mod)) {
      // no animation
      config.animation = false;
    } else if (/^(auto|top(left|right)?|bottom(left|right)?|left(top|bottom)?|right(top|bottom)?)$/.test(mod)) {
      // placement of popover
      config.placement = mod;
    } else if (/^(window|viewport)$/.test(mod)) {
      // bounday of popover
      config.boundary = mod;
    } else if (/^d\d+$/.test(mod)) {
      // delay value
      var delay = parseInt(mod.slice(1), 10) || 0;
      if (delay) {
        config.delay = delay;
      }
    } else if (/^o-?\d+$/.test(mod)) {
      // offset value (negative allowed)
      var offset = parseInt(mod.slice(1), 10) || 0;
      if (offset) {
        config.offset = offset;
      }
    }
  });

  // Special handling of event trigger modifiers Trigger is a space separated list
  var selectedTriggers = {};

  // parse current config object trigger
  var triggers = typeof config.trigger === 'string' ? config.trigger.trim().split(/\s+/) : [];
  triggers.forEach(function (trigger) {
    if (validTriggers[trigger]) {
      selectedTriggers[trigger] = true;
    }
  });

  // Parse Modifiers for triggers
  keys(validTriggers).forEach(function (trigger) {
    if (bindings.modifiers[trigger]) {
      selectedTriggers[trigger] = true;
    }
  });

  // Sanitize triggers
  config.trigger = keys(selectedTriggers).join(' ');
  if (config.trigger === 'blur') {
    // Blur by itself is useless, so convert it to focus
    config.trigger = 'focus';
  }
  if (!config.trigger) {
    // remove trigger config
    delete config.trigger;
  }

  return config;
}

//
// Add or Update popover on our element
//
/* istanbul ignore next: not easy to test */
function applyBVPO(el, bindings, vnode) {
  if (!inBrowser) {
    return;
  }
  if (!Popper) {
    // Popper is required for tooltips to work
    warn('v-b-popover: Popper.js is required for popovers to work');
    return;
  }
  if (el[BVPO]) {
    el[BVPO].updateConfig(parseBindings(bindings));
  } else {
    el[BVPO] = new PopOver(el, parseBindings(bindings), vnode.context.$root);
  }
};

//
// Remove popover on our element
//
/* istanbul ignore next */
function removeBVPO(el) {
  if (!inBrowser) {
    return;
  }
  if (el[BVPO]) {
    el[BVPO].destroy();
    el[BVPO] = null;
    delete el[BVPO];
  }
}

/*
 * Export our directive
 */
/* istanbul ignore next: not easy to test */
export default {
  bind: function bind(el, bindings, vnode) {
    applyBVPO(el, bindings, vnode);
  },
  inserted: function inserted(el, bindings, vnode) {
    applyBVPO(el, bindings, vnode);
  },
  update: function update(el, bindings, vnode) {
    if (bindings.value !== bindings.oldValue) {
      applyBVPO(el, bindings, vnode);
    }
  },
  componentUpdated: function componentUpdated(el, bindings, vnode) {
    if (bindings.value !== bindings.oldValue) {
      applyBVPO(el, bindings, vnode);
    }
  },
  unbind: function unbind(el) {
    removeBVPO(el);
  }
};