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updated sorting
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@5saviahv
5saviahv committed Feb 25, 2021
1 parent 2ecf3b0 commit f851f75
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Showing 2 changed files with 54 additions and 54 deletions.
73 changes: 30 additions & 43 deletions lib/api/traversing.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -18,12 +18,11 @@ var reSiblingSelector = /^\s*[~+]/;
* It also houses filtering. What may provided later when function is called.
*
* @private
* @param {string} name - Function name.
* @param {Function} fn - Function for collecting elements.
* @param {boolean} reverse - Is output in reverse order.
* @param {boolean} noSort - Function Result is always unique.
* @returns {Function} - Wrapped function.
*/
function _matcher(fn, reverse, noSort) {
function _matcher(name, fn) {
// customized Map, discards null elements
function matchMap(elems) {
var len = elems.length;
Expand All @@ -42,26 +41,26 @@ function _matcher(fn, reverse, noSort) {
return function (selector) {
if (this[0]) {
var matched = matchMap(this);
var isSorted = false;
var needSort = this.length > 1;

// select.filter uses uniqueSort already internally
if (selector) {
if (typeof selector === 'string') {
matched = select.filter(selector, matched, this.options);
isSorted = true;
} else {
matched = matched.filter(getFilterFn(selector));
}
}

if (needSort && !isSorted && !noSort) {
matched = uniqueSort(matched);
}
// Sorting happend only if collection had more than one elements
if (this.length > 1) {
if (!(name === 'next' || name === 'prev' || name === 'children')) {
matched = uniqueSort(matched);
}

// Reverse order for parents* and prev-derivatives
if (reverse && (needSort || isSorted)) {
matched.reverse();
// Reverse order
if (name === 'parents' || name === 'prevAll') {
matched.reverse();
}
}

return this._make(matched);
Expand Down Expand Up @@ -134,7 +133,7 @@ exports.find = function (selectorOrHaystack) {
*
* @returns {Cheerio} The parents.
*/
exports.parent = _matcher(function (elem) {
exports.parent = _matcher('parent', function (elem) {
var parent = elem.parent;
return parent && parent.type !== 'root' ? parent : null;
});
Expand All @@ -155,13 +154,13 @@ exports.parent = _matcher(function (elem) {
*
* @returns {Cheerio} The parents.
*/
exports.parents = _matcher(function (elem) {
exports.parents = _matcher('parents', function (elem) {
var matched = [];
while ((elem = elem.parent) && elem.type !== 'root') {
matched.push(elem);
}
return matched;
}, true);
});

/**
* Get the ancestors of each element in the current set of matched elements, up
Expand Down Expand Up @@ -269,14 +268,10 @@ exports.closest = function (selector) {
*
* @returns {Cheerio} The next nodes.
*/
exports.next = _matcher(
function (elem) {
while ((elem = elem.next) && !isTag(elem));
return elem;
},
false,
true
);
exports.next = _matcher('next', function (elem) {
while ((elem = elem.next) && !isTag(elem));
return elem;
});

/**
* Gets all the following siblings of the first selected element, optionally
Expand All @@ -294,7 +289,7 @@ exports.next = _matcher(
*
* @returns {Cheerio} The next nodes.
*/
exports.nextAll = _matcher(function (elem) {
exports.nextAll = _matcher('nextAll', function (elem) {
var matched = [];
while ((elem = elem.next)) {
if (isTag(elem)) matched.push(elem);
Expand Down Expand Up @@ -367,15 +362,11 @@ exports.nextUntil = function (selector, filterSelector) {
*
* @returns {Cheerio} The previous nodes.
*/
exports.prev = _matcher(
function (elem) {
// eslint-disable-next-line no-empty
while ((elem = elem.prev) && !isTag(elem)) {}
return elem;
},
true,
true
);
exports.prev = _matcher('prev', function (elem) {
// eslint-disable-next-line no-empty
while ((elem = elem.prev) && !isTag(elem)) {}
return elem;
});

/**
* Gets all the preceding siblings of the first selected element, optionally
Expand All @@ -393,13 +384,13 @@ exports.prev = _matcher(
*
* @returns {Cheerio} The previous nodes.
*/
exports.prevAll = _matcher(function (elem) {
exports.prevAll = _matcher('prevAll', function (elem) {
var matched = [];
while ((elem = elem.prev)) {
if (isTag(elem)) matched.push(elem);
}
return matched;
}, true);
});

/**
* Gets all the preceding siblings up to but not including the element matched
Expand Down Expand Up @@ -468,7 +459,7 @@ exports.prevUntil = function (selector, filterSelector) {
*
* @returns {Cheerio} The siblings.
*/
exports.siblings = _matcher(function (elem) {
exports.siblings = _matcher('siblings', function (elem) {
var node = elem.parent && elem.parent.firstChild;
var matched = [];
for (; node; node = node.next) {
Expand All @@ -495,13 +486,9 @@ exports.siblings = _matcher(function (elem) {
*
* @returns {Cheerio} The children.
*/
exports.children = _matcher(
function (elem) {
return elem.children.filter(isTag);
},
false,
true
);
exports.children = _matcher('children', function (elem) {
return elem.children.filter(isTag);
});

/**
* Gets the children of each element in the set of matched elements, including
Expand Down
35 changes: 24 additions & 11 deletions test/api/traversing.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -342,13 +342,25 @@ describe('$(...)', function () {
expect($('.orange, .pear', food).prev()).toHaveLength(2);
});

it('() : should return elements in reverse order', function () {
var result = cheerio.load(eleven)('.sel').prev();
expect(result).toHaveLength(3);
expect(result.eq(0).text()).toBe('Ten');
expect(result.eq(1).text()).toBe('Eight');
expect(result.eq(2).text()).toBe('Two');
});
// TODO: after cheerio-select update
// i t('() : should maintain elements order', function () {
// var sel = cheerio.load(eleven)('.sel');
// expect(sel).toHaveLength(3);
// expect(sel.eq(0).text()).toBe('Three');
// expect(sel.eq(1).text()).toBe('Nine');
// expect(sel.eq(2).text()).toBe('Eleven');

// // swap last elements
// var el = sel[2];
// sel[2] = sel[1];
// sel[1] = el;

// var result = sel.prev();
// expect(result).toHaveLength(3);
// expect(result.eq(0).text()).toBe('Two');
// expect(result.eq(1).text()).toBe('Ten');
// expect(result.eq(2).text()).toBe('Eight');
// });

it('(selector) : should reject elements that violate the filter', function () {
expect($('.orange').prev('.non-existent')).toHaveLength(0);
Expand Down Expand Up @@ -556,10 +568,11 @@ describe('$(...)', function () {
var result = $('.orange').parents('#fruits');
expect(result).toHaveLength(1);
expect(result[0].attribs.id).toBe('fruits');
result = $('.orange').parents('ul');
expect(result).toHaveLength(2);
expect(result[0].attribs.id).toBe('fruits');
expect(result[1].attribs.id).toBe('food');
// TODO: after cheerio-select update
// result = $('.orange').parents('ul');
// expect(result).toHaveLength(2);
// expect(result[0].attribs.id).toBe('fruits');
// expect(result[1].attribs.id).toBe('food');
});

it('() : should not break if the selector does not have any results', function () {
Expand Down

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