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LibWeb: Implement Selection.setBaseAndExtent
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2 changed files with 42 additions and 7 deletions
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@ -237,13 +237,48 @@ WebIDL::ExceptionOr<void> Selection::extend(JS::NonnullGCPtr<DOM::Node> node, un
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}
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// https://w3c.github.io/selection-api/#dom-selection-setbaseandextent
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void Selection::set_base_and_extent(JS::NonnullGCPtr<DOM::Node> anchor_node, unsigned anchor_offset, JS::NonnullGCPtr<DOM::Node> focus_node, unsigned focus_offset)
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WebIDL::ExceptionOr<void> Selection::set_base_and_extent(JS::NonnullGCPtr<DOM::Node> anchor_node, unsigned anchor_offset, JS::NonnullGCPtr<DOM::Node> focus_node, unsigned focus_offset)
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{
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(void)anchor_node;
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(void)anchor_offset;
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(void)focus_node;
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(void)focus_offset;
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TODO();
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// 1. If anchorOffset is longer than anchorNode's length or if focusOffset is longer than focusNode's length, throw an IndexSizeError exception and abort these steps.
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if (anchor_offset > anchor_node->length())
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return WebIDL::IndexSizeError::create(realm(), "Anchor offset points outside of the anchor node");
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if (focus_offset > focus_node->length())
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return WebIDL::IndexSizeError::create(realm(), "Focus offset points outside of the focus node");
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// 2. If the roots of anchorNode or focusNode are not the document associated with this, abort these steps.
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if (&anchor_node->root() != m_document.ptr())
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return {};
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if (&focus_node->root() != m_document.ptr())
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return {};
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// 3. Let anchor be the boundary point (anchorNode, anchorOffset) and let focus be the boundary point (focusNode, focusOffset).
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// 4. Let newRange be a new range.
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auto new_range = DOM::Range::create(*m_document);
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// 5. If anchor is before focus, set the start the newRange's start to anchor and its end to focus. Otherwise, set the start them to focus and anchor respectively.
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auto position_of_anchor_relative_to_focus = DOM::position_of_boundary_point_relative_to_other_boundary_point(anchor_node, anchor_offset, focus_node, focus_offset);
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if (position_of_anchor_relative_to_focus == DOM::RelativeBoundaryPointPosition::Before) {
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TRY(new_range->set_start(anchor_node, anchor_offset));
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TRY(new_range->set_end(focus_node, focus_offset));
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} else {
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TRY(new_range->set_start(focus_node, focus_offset));
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TRY(new_range->set_end(anchor_node, anchor_offset));
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}
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// 6. Set this's range to newRange.
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m_range = new_range;
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// 7. If focus is before anchor, set this's direction to backwards. Otherwise, set it to forwards
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// NOTE: "Otherwise" can be seen as "focus is equal to or after anchor".
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if (position_of_anchor_relative_to_focus == DOM::RelativeBoundaryPointPosition::After)
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m_direction = Direction::Backwards;
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else
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m_direction = Direction::Forwards;
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return {};
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}
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// https://w3c.github.io/selection-api/#dom-selection-selectallchildren
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