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HTML: Put HTMLTextAreaElement selection helpers in FormAssociatedElement

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This will allow us to more closely follow the spec and share these
functions with HTMLInputElement.
This commit is contained in:
Shannon Booth
2024-07-28 15:55:09 +12:00
committed by Andreas Kling
parent 28ed8e5d0f
commit 62bf428a7f
Notes: github-actions[bot] 2024-08-01 10:17:57 +00:00 
Author: https://github.com/shannonbooth
Commit: https://github.com/LadybirdBrowser/ladybird/commit/62bf428a7f5
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/876
4 changed files with 64 additions and 63 deletions
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57
Userland/Libraries/LibWeb/HTML/FormAssociatedElement.cpp
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@@ -152,4 +152,61 @@ void FormAssociatedElement::reset_form_owner()
}
}
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-textarea/input-selectionstart
WebIDL::UnsignedLong FormAssociatedElement::selection_start() const
{
// FIXME: 1. If this element is an input element, and selectionStart does not apply to this element, return null.
// 2. If there is no selection, return the code unit offset within the relevant value to the character that
// immediately follows the text entry cursor.
if (auto navigable = form_associated_element_to_html_element().document().navigable()) {
if (auto cursor = navigable->cursor_position())
return cursor->offset();
}
// FIXME: 3. Return the code unit offset within the relevant value to the character that immediately follows the start of
// the selection.
return 0;
}
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#textFieldSelection:dom-textarea/input-selectionstart-2
WebIDL::ExceptionOr<void> FormAssociatedElement::set_selection_start(WebIDL::UnsignedLong)
{
// FIXME: 1. If this element is an input element, and selectionStart does not apply to this element, throw an
// "InvalidStateError" DOMException.
// FIXME: 2. Let end be the value of this element's selectionEnd attribute.
// FIXME: 3. If end is less than the given value, set end to the given value.
// FIXME: 4. Set the selection range with the given value, end, and the value of this element's selectionDirection attribute.
return {};
}
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-textarea/input-selectionend
WebIDL::UnsignedLong FormAssociatedElement::selection_end() const
{
// FIXME: 1. If this element is an input element, and selectionEnd does not apply to this element, return null.
// 2. If there is no selection, return the code unit offset within the relevant value to the character that
// immediately follows the text entry cursor.
if (auto navigable = form_associated_element_to_html_element().document().navigable()) {
if (auto cursor = navigable->cursor_position())
return cursor->offset();
}
// FIXME: 3. Return the code unit offset within the relevant value to the character that immediately follows the end of
// the selection.
return 0;
}
// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#textFieldSelection:dom-textarea/input-selectionend-3
WebIDL::ExceptionOr<void> FormAssociatedElement::set_selection_end(WebIDL::UnsignedLong)
{
// FIXME: 1. If this element is an input element, and selectionEnd does not apply to this element, throw an
// "InvalidStateError" DOMException.
// FIXME: 2. Set the selection range with the value of this element's selectionStart attribute, the given value, and the
// value of this element's selectionDirection attribute.
return {};
}
}