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https://github.com/LadybirdBrowser/ladybird.git
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1b6824d296
A Frame now knows about its nesting-level. The FrameLoader checks whether the recursion level of the current frame allows it to be displayed and if not doesn't even load the requested resource. The nesting-check is done on a per-URL-basis, so there can be many many nested Frames as long as they have different URLs. If there are however Frames with the same URL nested inside each other we only allow this to happen 3 times. This mitigates infinetely recursing <iframe>s in an HTML-document crashing the browser with an OOM.
118 lines
3.6 KiB
C++
118 lines
3.6 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Function.h>
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#include <AK/Noncopyable.h>
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#include <AK/RefPtr.h>
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#include <AK/WeakPtr.h>
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#include <LibCore/Timer.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Rect.h>
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#include <LibGfx/Size.h>
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#include <LibWeb/DOM/Position.h>
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#include <LibWeb/Loader/FrameLoader.h>
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#include <LibWeb/Page/EventHandler.h>
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#include <LibWeb/TreeNode.h>
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namespace Web {
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class Frame : public TreeNode<Frame> {
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public:
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static NonnullRefPtr<Frame> create_subframe(DOM::Element& host_element, Frame& main_frame) { return adopt_ref(*new Frame(host_element, main_frame)); }
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static NonnullRefPtr<Frame> create(Page& page) { return adopt_ref(*new Frame(page)); }
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~Frame();
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class ViewportClient {
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public:
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virtual ~ViewportClient() { }
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virtual void frame_did_set_viewport_rect(const Gfx::IntRect&) = 0;
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};
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void register_viewport_client(ViewportClient&);
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void unregister_viewport_client(ViewportClient&);
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bool is_main_frame() const { return this == &m_main_frame; }
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bool is_focused_frame() const;
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const DOM::Document* document() const { return m_document; }
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DOM::Document* document() { return m_document; }
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void set_document(DOM::Document*);
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Page* page() { return m_page; }
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const Page* page() const { return m_page; }
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const Gfx::IntSize& size() const { return m_size; }
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void set_size(const Gfx::IntSize&);
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void set_needs_display(const Gfx::IntRect&);
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void set_viewport_scroll_offset(const Gfx::IntPoint&);
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Gfx::IntRect viewport_rect() const { return { m_viewport_scroll_offset, m_size }; }
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void set_viewport_rect(const Gfx::IntRect&);
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FrameLoader& loader() { return m_loader; }
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const FrameLoader& loader() const { return m_loader; }
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EventHandler& event_handler() { return m_event_handler; }
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const EventHandler& event_handler() const { return m_event_handler; }
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void scroll_to_anchor(const String&);
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Frame& main_frame() { return m_main_frame; }
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const Frame& main_frame() const { return m_main_frame; }
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DOM::Element* host_element() { return m_host_element; }
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const DOM::Element* host_element() const { return m_host_element; }
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Gfx::IntPoint to_main_frame_position(const Gfx::IntPoint&);
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Gfx::IntRect to_main_frame_rect(const Gfx::IntRect&);
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const DOM::Position& cursor_position() const { return m_cursor_position; }
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void set_cursor_position(DOM::Position);
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bool cursor_blink_state() const { return m_cursor_blink_state; }
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String selected_text() const;
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void did_edit(Badge<EditEventHandler>);
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void register_frame_nesting(URL const&);
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bool is_frame_nesting_allowed(URL const&) const;
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void set_frame_nesting_levels(const HashMap<URL, size_t> frame_nesting_levels) { m_frame_nesting_levels = move(frame_nesting_levels); };
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HashMap<URL, size_t> const& frame_nesting_levels() const { return m_frame_nesting_levels; }
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private:
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explicit Frame(DOM::Element& host_element, Frame& main_frame);
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explicit Frame(Page&);
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void reset_cursor_blink_cycle();
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void setup();
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WeakPtr<Page> m_page;
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Frame& m_main_frame;
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FrameLoader m_loader;
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EventHandler m_event_handler;
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WeakPtr<DOM::Element> m_host_element;
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RefPtr<DOM::Document> m_document;
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Gfx::IntSize m_size;
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Gfx::IntPoint m_viewport_scroll_offset;
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DOM::Position m_cursor_position;
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RefPtr<Core::Timer> m_cursor_blink_timer;
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bool m_cursor_blink_state { false };
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HashTable<ViewportClient*> m_viewport_clients;
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HashMap<URL, size_t> m_frame_nesting_levels;
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};
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}
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