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LibWeb: Add HTML::TraversableNavigable

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This is the "traversable navigable" concept from the HTML spec.

Co-authored-by: Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
This commit is contained in:
Andreas Kling 2022-12-12 12:01:09 +01:00
parent 2d602dcb34
commit 74a6f50c91
4 changed files with 81 additions and 0 deletions
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1
Userland/Libraries/LibWeb/CMakeLists.txt
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@ -349,6 +349,7 @@ set(SOURCES
HTML/Timer.cpp
HTML/TimeRanges.cpp
HTML/TrackEvent.cpp
HTML/TraversableNavigable.cpp
HTML/VideoTrack.cpp
HTML/VideoTrackList.cpp
HTML/Window.cpp

1
Userland/Libraries/LibWeb/Forward.h
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@ -385,6 +385,7 @@ class TextMetrics;
class Timer;
class TimeRanges;
class TrackEvent;
class TraversableNavigable;
class VideoTrack;
class VideoTrackList;
class Window;

30
Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp Normal file
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@ -0,0 +1,30 @@
/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/HTML/SessionHistoryEntry.h>
#include <LibWeb/HTML/TraversableNavigable.h>
namespace Web::HTML {
TraversableNavigable::TraversableNavigable() = default;
TraversableNavigable::~TraversableNavigable() = default;
void TraversableNavigable::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
for (auto& entry : m_session_history_entries)
visitor.visit(entry);
}
// https://html.spec.whatwg.org/multipage/document-sequences.html#top-level-traversable
bool TraversableNavigable::is_top_level_traversable() const
{
// A top-level traversable is a traversable navigable with a null parent.
return parent() == nullptr;
}
}

49
Userland/Libraries/LibWeb/HTML/TraversableNavigable.h Normal file
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@ -0,0 +1,49 @@
/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Vector.h>
#include <LibWeb/HTML/Navigable.h>
#include <LibWeb/HTML/VisibilityState.h>
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable
class TraversableNavigable final : public Navigable {
JS_CELL(TraversableNavigable, Navigable);
public:
virtual ~TraversableNavigable() override;
bool is_top_level_traversable() const;
int current_session_history_step() const { return m_current_session_history_step; };
Vector<JS::NonnullGCPtr<SessionHistoryEntry>> const& session_history_entries() const { return m_session_history_entries; };
bool running_nested_apply_history_step() const { return m_running_nested_apply_history_step; };
VisibilityState system_visibility_state() const { return m_system_visibility_state; };
private:
TraversableNavigable();
virtual void visit_edges(Cell::Visitor&) override;
// https://html.spec.whatwg.org/multipage/document-sequences.html#tn-current-session-history-step
int m_current_session_history_step { 0 };
// https://html.spec.whatwg.org/multipage/document-sequences.html#tn-session-history-entries
Vector<JS::NonnullGCPtr<SessionHistoryEntry>> m_session_history_entries;
// FIXME: https://html.spec.whatwg.org/multipage/document-sequences.html#tn-session-history-traversal-queue
// https://html.spec.whatwg.org/multipage/document-sequences.html#tn-running-nested-apply-history-step
bool m_running_nested_apply_history_step { false };
// https://html.spec.whatwg.org/multipage/document-sequences.html#system-visibility-state
VisibilityState m_system_visibility_state { VisibilityState::Visible };
};
}