ladybird/Libraries/LibWeb/HTML/SessionHistoryEntry.h
Aliaksandr Kalenik ce81f16530 LibWeb: Remove SessionHistoryEntry::clone() and DocumentState::clone()
With apply_to() now self-contained (carrying its own replacement
DocumentState rather than reading from the live entry), the clone at
the traversal call site is no longer needed.

The clone previously served two purposes:
1. Input snapshot: freeze entry fields before deferred population.
   Now solved by changing populate_session_history_entry_document() to
   take explicit input parameters, snapshotted before the
   deferred_invoke.
2. Output isolation: absorb apply_to() and post-population adjustments
   without mutating the live entry during unload. Now solved by storing
   the PopulateSessionHistoryEntryDocumentOutput on the continuation
   state and deferring all mutations (including the origin-based
   classic_history_api_state reset and navigable_target_name clear)
   to after_potential_unload.

The post-population adjustments run unconditionally in
after_potential_unload, covering both the population path and the
non-population path (e.g. traversal to an already-populated error
entry).
2026-03-27 02:34:55 +01:00

127 lines
6 KiB
C++

/*
* Copyright (c) 2022, Andreas Kling <andreas@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/WeakPtr.h>
#include <LibGC/Ptr.h>
#include <LibJS/Heap/Cell.h>
#include <LibURL/URL.h>
#include <LibWeb/Forward.h>
#include <LibWeb/HTML/PolicyContainers.h>
#include <LibWeb/HTML/StructuredSerializeTypes.h>
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/history.html#scroll-restoration-mode
enum class ScrollRestorationMode {
// https://html.spec.whatwg.org/multipage/history.html#dom-scrollrestoration-auto
// The user agent is responsible for restoring the scroll position upon navigation.
Auto,
// https://html.spec.whatwg.org/multipage/history.html#dom-scrollrestoration-manual
// The page is responsible for restoring the scroll position and the user agent does not attempt to do so automatically.
Manual,
};
// https://html.spec.whatwg.org/multipage/history.html#session-history-entry
class SessionHistoryEntry final : public JS::Cell {
GC_CELL(SessionHistoryEntry, JS::Cell);
GC_DECLARE_ALLOCATOR(SessionHistoryEntry);
public:
SessionHistoryEntry();
void visit_edges(Cell::Visitor&) override;
GC::Ptr<DOM::Document> document() const;
enum class Pending {
Tag,
};
[[nodiscard]] Variant<int, Pending> step() const { return m_step; }
void set_step(Variant<int, Pending> step) { m_step = step; }
[[nodiscard]] URL::URL const& url() const { return m_url; }
void set_url(URL::URL url) { m_url = move(url); }
[[nodiscard]] GC::Ptr<HTML::DocumentState> document_state() const { return m_document_state; }
void set_document_state(GC::Ptr<HTML::DocumentState> document_state) { m_document_state = document_state; }
[[nodiscard]] SerializationRecord const& classic_history_api_state() const { return m_classic_history_api_state; }
void set_classic_history_api_state(SerializationRecord classic_history_api_state) { m_classic_history_api_state = move(classic_history_api_state); }
[[nodiscard]] SerializationRecord const& navigation_api_state() const { return m_navigation_api_state; }
void set_navigation_api_state(SerializationRecord navigation_api_state) { m_navigation_api_state = move(navigation_api_state); }
[[nodiscard]] String const& navigation_api_key() const { return m_navigation_api_key; }
void set_navigation_api_key(String navigation_api_key) { m_navigation_api_key = move(navigation_api_key); }
[[nodiscard]] String const& navigation_api_id() const { return m_navigation_api_id; }
void set_navigation_api_id(String navigation_api_id) { m_navigation_api_id = move(navigation_api_id); }
[[nodiscard]] ScrollRestorationMode scroll_restoration_mode() const { return m_scroll_restoration_mode; }
void set_scroll_restoration_mode(ScrollRestorationMode scroll_restoration_mode) { m_scroll_restoration_mode = scroll_restoration_mode; }
[[nodiscard]] GC::Ptr<PolicyContainer> policy_container() const { return m_policy_container; }
void set_policy_container(GC::Ptr<PolicyContainer> policy_container) { m_policy_container = policy_container; }
[[nodiscard]] Optional<ByteString> const& browsing_context_name() const { return m_browsing_context_name; }
void set_browsing_context_name(Optional<ByteString> browsing_context_name) { m_browsing_context_name = move(browsing_context_name); }
[[nodiscard]] GC::Ptr<BrowsingContext> original_source_browsing_context() const { return m_original_source_browsing_context; }
void set_original_source_browsing_context(GC::Ptr<BrowsingContext> original_source_browsing_context) { m_original_source_browsing_context = original_source_browsing_context; }
private:
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-step
// step, a non-negative integer or "pending", initially "pending".
Variant<int, Pending> m_step { Pending::Tag };
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-url
// URL, a URL
URL::URL m_url;
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state
GC::Ptr<HTML::DocumentState> m_document_state;
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-classic-history-api-state
// classic history API state, which is serialized state, initially StructuredSerializeForStorage(null).
SerializationRecord m_classic_history_api_state;
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-navigation-api-state
// navigation API state, which is a serialized state, initially StructuredSerializeForStorage(undefined).
SerializationRecord m_navigation_api_state;
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-navigation-api-key
// navigation API key, which is a string, initially set to the result of generating a random UUID.
String m_navigation_api_key;
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-navigation-api-id
// navigation API ID, which is a string, initially set to the result of generating a random UUID.
String m_navigation_api_id;
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-scroll-restoration-mode
// scroll restoration mode, a scroll restoration mode, initially "auto"
ScrollRestorationMode m_scroll_restoration_mode { ScrollRestorationMode::Auto };
// policy container, a policy container or null
GC::Ptr<PolicyContainer> m_policy_container;
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-scroll-position
// FIXME: scroll position data, which is scroll position data for the document's restorable scrollable regions
// browsing context name, a browsing context name or null, initially null
Optional<ByteString> m_browsing_context_name;
// https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-other
// FIXME: persisted user state, which is implementation-defined, initially null
// NOTE: This is where we could remember the state of form controls, for example.
GC::Ptr<BrowsingContext> m_original_source_browsing_context;
};
}