Cannot replace root elements in html-fragment

[shtse8]

<p>Paragraph 1</p> <p>Paragraph 2</p><p>Paragraph 3</p>

As there is no root, how can I search the p and replace it?
I tired to use filter and replace, but it will remove all my matched elements.

$dom = FluentDOM::QueryCss('<p>Paragraph 1</p> <p>Paragraph 2</p><p>Paragraph 3</p>', 'html-fragment');
$dom->filter('p')->first()->each(function($element) {
	$element->replace('hi');
});
echo $dom;

Expected:

hi <p>Paragraph 2</p><p>Paragraph 3</p>

Actual:

 <p>Paragraph 2</p><p>Paragraph 3</p>

[ThomasWeinert]

If you're loading an HTML fragment the top level elements should be automatically selected. Here is a problem with replace() however.

At current implementation required the node to have a parent that is an element node. But in this case it is the document node. I added a test and a fix.

[shtse8]

I have tried the new commit. filter seems can search deeply.

Code:

$dom = FluentDOM::QueryCss('<div><b>5</b><p>4</p></div>', 'html-fragment');
$dom->filter('p')->each(function($element) {
	$element->replace('hi');
});
echo $dom;

Expected:

<div><b>5</b><p>4</p></div>

Actual:

hi

In jquery:

var test = $("<div><b>5</b><p>4</p></div>");
test.filter("p").replaceWith('hi');
console.log(test.outerHTML());

Result:

<div><b>5</b><p>4</p></div>

And with the following Code, the result is also wrong:

$dom = FluentDOM::QueryCss('<p>Paragraph 1</p> <p>Paragraph 2</p><p>Paragraph 3</p><div><b>5</b><p>4</p></div>', 'html-fragment');
$dom->filter('p')->last()->replaceWith('hi');
echo $dom;

Expected:

<p>Paragraph 1</p> <p>Paragraph 2</p>hi<div><b>5</b><p>4</p></div>

Actual:

<p>Paragraph 1</p> <p>Paragraph 2</p><p>Paragraph 3</p>hi

[ThomasWeinert]

filter() reduces the current selection. You're filtering the current selection for any node that is a 'p' or has a 'p' descendant. The div has a p descendant so it matches. The div is replaced.

Why don't you use find()?

[shtse8]

But the result is different from the jquery version as I posted above.

The reason why I don't use find because I can't find the root elements.

code:

$dom = FluentDOM::QueryCss('<p>Paragraph 1</p> <p>Paragraph 2</p><p>Paragraph 3</p><div><b>5</b><p>4</p></div>', 'html-fragment');
$dom->find('p')->first()->replaceWith('hi');
echo $dom;

Result:

<p>Paragraph 1</p> <p>Paragraph 2</p><p>Paragraph 3</p><div><b>5</b>hi</div>

the first it finds is the p inside the div.

[shtse8]

Hi, any updates?

[ThomasWeinert]

The actual problem left seems to be with the CSS Selector to Xpath conversion. I added some tests using specific Xpath expressions and it works:

FluentDOM/FluentDOM@a8c925b

This is difficult to debug because the conversion is not part of FluentDOM itself and an edge case.
I will look into it further but it will take time.