ladybird/Userland/Libraries/LibWeb/DOM/Position.h
Aliaksandr Kalenik 906ac71eca LibWeb: Fix crashing after input into empty contenteditable
Change `EventHandler::handle_keydown()` to no longer assume the cursor
position's node is always a `DOM::Text`. While this assumption holds
for `HTMLInputElement` that has a shadow DOM with a text node, an empty
`contenteditable` might not have any children. With this change,
`handle_keydown()` creates a new text node if the cursor position's
node is not a text node.
2024-02-24 08:09:01 +01:00

64 lines
1.6 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Max Wipfli <mail@maxwipfli.ch>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <AK/RefPtr.h>
#include <AK/String.h>
#include <LibJS/Heap/Heap.h>
#include <LibWeb/DOM/Node.h>
#include <LibWeb/Forward.h>
namespace Web::DOM {
class Position final : public JS::Cell {
JS_CELL(Position, JS::Cell);
JS_DECLARE_ALLOCATOR(Position);
public:
[[nodiscard]] static JS::NonnullGCPtr<Position> create(JS::Realm& realm, JS::NonnullGCPtr<Node> node, unsigned offset)
{
return realm.heap().allocate<Position>(realm, node, offset);
}
JS::GCPtr<Node> node() { return m_node; }
JS::GCPtr<Node const> node() const { return m_node; }
void set_node(JS::NonnullGCPtr<Node> node) { m_node = node; }
unsigned offset() const { return m_offset; }
bool offset_is_at_end_of_node() const;
void set_offset(unsigned value) { m_offset = value; }
bool increment_offset();
bool decrement_offset();
bool equals(JS::NonnullGCPtr<Position> other) const
{
return m_node.ptr() == other->m_node.ptr() && m_offset == other->m_offset;
}
ErrorOr<String> to_string() const;
private:
Position(JS::GCPtr<Node>, unsigned offset);
virtual void visit_edges(Visitor&) override;
JS::GCPtr<Node> m_node;
unsigned m_offset { 0 };
};
}
template<>
struct AK::Formatter<Web::DOM::Position> : Formatter<StringView> {
ErrorOr<void> format(FormatBuilder& builder, Web::DOM::Position const& value)
{
return Formatter<StringView>::format(builder, TRY(value.to_string()));
}
};