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121 lines
3.3 KiB
121 lines
3.3 KiB
import ScrollSpy from './scrollspy.class';
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import { isBrowser } from '../../utils/env';
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import { isNumber, isObject, isString } from '../../utils/inspect';
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import { mathRound } from '../../utils/math';
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import { toInteger } from '../../utils/number';
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import { keys } from '../../utils/object'; // Key we use to store our instance
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var BV_SCROLLSPY = '__BV_ScrollSpy__'; // Pre-compiled regular expressions
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var onlyDigitsRE = /^\d+$/;
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var offsetRE = /^(auto|position|offset)$/; // Build a ScrollSpy config based on bindings (if any)
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// Arguments and modifiers take precedence over passed value config object
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/* istanbul ignore next: not easy to test */
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var parseBindings = function parseBindings(bindings)
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/* istanbul ignore next: not easy to test */
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{
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var config = {}; // If argument, assume element ID
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if (bindings.arg) {
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// Element ID specified as arg
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// We must prepend '#' to become a CSS selector
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config.element = "#".concat(bindings.arg);
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} // Process modifiers
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keys(bindings.modifiers).forEach(function (mod) {
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if (onlyDigitsRE.test(mod)) {
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// Offset value
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config.offset = toInteger(mod, 0);
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} else if (offsetRE.test(mod)) {
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// Offset method
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config.method = mod;
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}
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}); // Process value
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if (isString(bindings.value)) {
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// Value is a CSS ID or selector
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config.element = bindings.value;
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} else if (isNumber(bindings.value)) {
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// Value is offset
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config.offset = mathRound(bindings.value);
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} else if (isObject(bindings.value)) {
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// Value is config object
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// Filter the object based on our supported config options
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keys(bindings.value).filter(function (k) {
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return !!ScrollSpy.DefaultType[k];
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}).forEach(function (k) {
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config[k] = bindings.value[k];
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});
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}
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return config;
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}; // Add or update ScrollSpy on our element
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var applyScrollspy = function applyScrollspy(el, bindings, vnode)
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/* istanbul ignore next: not easy to test */
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{
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if (!isBrowser) {
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/* istanbul ignore next */
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return;
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}
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var config = parseBindings(bindings);
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if (el[BV_SCROLLSPY]) {
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el[BV_SCROLLSPY].updateConfig(config, vnode.context.$root);
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} else {
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el[BV_SCROLLSPY] = new ScrollSpy(el, config, vnode.context.$root);
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}
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}; // Remove ScrollSpy on our element
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/* istanbul ignore next: not easy to test */
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var removeScrollspy = function removeScrollspy(el)
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/* istanbul ignore next: not easy to test */
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{
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if (el[BV_SCROLLSPY]) {
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el[BV_SCROLLSPY].dispose();
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el[BV_SCROLLSPY] = null;
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delete el[BV_SCROLLSPY];
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}
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};
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/*
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* Export our directive
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*/
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export var VBScrollspy = {
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/* istanbul ignore next: not easy to test */
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bind: function bind(el, bindings, vnode) {
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applyScrollspy(el, bindings, vnode);
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},
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/* istanbul ignore next: not easy to test */
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inserted: function inserted(el, bindings, vnode) {
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applyScrollspy(el, bindings, vnode);
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},
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/* istanbul ignore next: not easy to test */
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update: function update(el, bindings, vnode) {
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if (bindings.value !== bindings.oldValue) {
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applyScrollspy(el, bindings, vnode);
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}
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},
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/* istanbul ignore next: not easy to test */
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componentUpdated: function componentUpdated(el, bindings, vnode) {
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if (bindings.value !== bindings.oldValue) {
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applyScrollspy(el, bindings, vnode);
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}
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},
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/* istanbul ignore next: not easy to test */
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unbind: function unbind(el) {
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removeScrollspy(el);
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}
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};
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