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LibWeb: Implement Selection.collapse_to_start

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Rafał Babiarz 2022-12-09 22:08:16 +01:00 • committed by Andreas Kling
parent 6d46ebfe8a
commit bb5da1b4e2
2 changed files with 17 additions and 3 deletions
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18
Userland/Libraries/LibWeb/Selection/Selection.cpp
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@ -199,9 +199,23 @@ WebIDL::ExceptionOr<void> Selection::set_position(JS::GCPtr<DOM::Node> node, uns
}
// https://w3c.github.io/selection-api/#dom-selection-collapsetostart
void Selection::collapse_to_start()
WebIDL::ExceptionOr<void> Selection::collapse_to_start()
{
TODO();
// 1. The method must throw InvalidStateError exception if the this is empty.
if (!m_range) {
return WebIDL::InvalidStateError::create(realm(), "Selection.collapse_to_start() on empty range"sv);
}
// 2. Otherwise, it must create a new range
auto new_range = DOM::Range::create(*m_document);
// 3. Set the start both its start and end to the start of this's range
TRY(new_range->set_start(*anchor_node(), m_range->start_offset()));
TRY(new_range->set_end(*anchor_node(), m_range->start_offset()));
// 4. Then set this's range to the newly-created range.
m_range = new_range;
return {};
}
// https://w3c.github.io/selection-api/#dom-selection-collapsetoend