/* * Copyright (c) 2021, Luke Wilde * * SPDX-License-Identifier: BSD-2-Clause */ #include #include #include namespace Web::HTML { WebIDL::ExceptionOr> History::create(JS::Realm& realm, DOM::Document& document) { return MUST_OR_THROW_OOM(realm.heap().allocate(realm, realm, document)); } History::History(JS::Realm& realm, DOM::Document& document) : PlatformObject(realm) , m_associated_document(document) { } History::~History() = default; JS::ThrowCompletionOr History::initialize(JS::Realm& realm) { MUST_OR_THROW_OOM(Base::initialize(realm)); set_prototype(&Bindings::ensure_web_prototype(realm, "History")); return {}; } void History::visit_edges(Cell::Visitor& visitor) { Base::visit_edges(visitor); visitor.visit(m_associated_document.ptr()); } // https://html.spec.whatwg.org/multipage/history.html#dom-history-pushstate WebIDL::ExceptionOr History::push_state(JS::Value data, DeprecatedString const&, DeprecatedString const& url) { // NOTE: The second parameter of this function is intentionally unused. return shared_history_push_replace_state(data, url, IsPush::Yes); } // https://html.spec.whatwg.org/multipage/history.html#dom-history-replacestate WebIDL::ExceptionOr History::replace_state(JS::Value data, DeprecatedString const&, DeprecatedString const& url) { // NOTE: The second parameter of this function is intentionally unused. return shared_history_push_replace_state(data, url, IsPush::No); } // https://html.spec.whatwg.org/multipage/history.html#dom-history-length WebIDL::ExceptionOr History::length() const { // 1. If this's associated Document is not fully active, then throw a "SecurityError" DOMException. if (!m_associated_document->is_fully_active()) return WebIDL::SecurityError::create(realm(), "Cannot perform length on a document that isn't fully active."sv); // 2. Return the number of entries in the top-level browsing context's joint session history. auto const* browsing_context = m_associated_document->browsing_context(); // FIXME: We don't have the concept of "joint session history", this is an ad-hoc implementation. // See: https://html.spec.whatwg.org/multipage/history.html#joint-session-history return browsing_context->session_history().size(); } // https://html.spec.whatwg.org/multipage/history.html#dom-history-go WebIDL::ExceptionOr History::go(long delta = 0) { // 1. Let document be this's associated Document. // 2. If document is not fully active, then throw a "SecurityError" DOMException. if (!m_associated_document->is_fully_active()) return WebIDL::SecurityError::create(realm(), "Cannot perform go on a document that isn't fully active."sv); // 3. If delta is 0, then act as if the location.reload() method was called, and return. auto* browsing_context = m_associated_document->browsing_context(); auto current_entry_index = browsing_context->session_history_index(); auto next_entry_index = current_entry_index + delta; auto const& sessions = browsing_context->session_history(); if (next_entry_index < sessions.size()) { auto const& next_entry = sessions.at(next_entry_index); // FIXME: 4. Traverse the history by a delta with delta and document's browsing context. browsing_context->loader().load(next_entry.url, FrameLoader::Type::Reload); } return {}; } // https://html.spec.whatwg.org/multipage/history.html#dom-history-back WebIDL::ExceptionOr History::back() { // 1. Let document be this's associated Document. // 2. If document is not fully active, then throw a "SecurityError" DOMException. // NOTE: We already did this check in `go` method, so skip the fully active check here. // 3. Traverse the history by a delta with −1 and document's browsing context. return go(-1); } // https://html.spec.whatwg.org/multipage/history.html#dom-history-forward WebIDL::ExceptionOr History::forward() { // 1. Let document be this's associated Document. // 2. If document is not fully active, then throw a "SecurityError" DOMException. // NOTE: We already did this check in `go` method, so skip the fully active check here. // 3. Traverse the history by a delta with +1 and document's browsing context. return go(1); } // https://html.spec.whatwg.org/multipage/history.html#shared-history-push/replace-state-steps WebIDL::ExceptionOr History::shared_history_push_replace_state(JS::Value, DeprecatedString const&, IsPush) { // 1. Let document be history's associated Document. (NOTE: Not necessary) // 2. If document is not fully active, then throw a "SecurityError" DOMException. if (!m_associated_document->is_fully_active()) return WebIDL::SecurityError::create(realm(), "Cannot perform pushState or replaceState on a document that isn't fully active."sv); // 3. Optionally, return. (For example, the user agent might disallow calls to these methods that are invoked on a timer, // or from event listeners that are not triggered in response to a clear user action, or that are invoked in rapid succession.) dbgln("FIXME: Implement shared_history_push_replace_state."); return {}; // FIXME: Add the rest of the spec steps once they're added. } }