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https://github.com/LadybirdBrowser/ladybird
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2d4728d353
When editing or changing the selection inside an <input> or <textarea>, we should scroll the container so the cursor is always visible. Note that currently the cursor might still become invisible at the end of the container since we do not reserve enough space for it to be made visible.
113 lines
4.5 KiB
C++
113 lines
4.5 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <andreas@ladybird.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/Forward.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/WeakPtr.h>
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#include <LibGC/Ptr.h>
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#include <LibGfx/Forward.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibUnicode/Forward.h>
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#include <LibWeb/CSS/ComputedValues.h>
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#include <LibWeb/Export.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Gamepad/SDLGamepadForward.h>
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#include <LibWeb/Page/EventResult.h>
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#include <LibWeb/Page/InputEvent.h>
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#include <LibWeb/PixelUnits.h>
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#include <LibWeb/UIEvents/KeyCode.h>
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namespace Web {
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class WEB_API EventHandler {
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public:
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explicit EventHandler(Badge<HTML::Navigable>, HTML::Navigable&);
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~EventHandler();
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EventResult handle_mouseup(CSSPixelPoint, CSSPixelPoint screen_position, unsigned button, unsigned buttons, unsigned modifiers);
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EventResult handle_mousedown(CSSPixelPoint, CSSPixelPoint screen_position, unsigned button, unsigned buttons, unsigned modifiers);
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EventResult handle_mousemove(CSSPixelPoint, CSSPixelPoint screen_position, unsigned buttons, unsigned modifiers);
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EventResult handle_mouseleave();
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EventResult handle_mousewheel(CSSPixelPoint, CSSPixelPoint screen_position, unsigned button, unsigned buttons, unsigned modifiers, int wheel_delta_x, int wheel_delta_y);
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EventResult handle_doubleclick(CSSPixelPoint, CSSPixelPoint screen_position, unsigned button, unsigned buttons, unsigned modifiers);
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EventResult handle_tripleclick(CSSPixelPoint, CSSPixelPoint screen_position, unsigned button, unsigned buttons, unsigned modifiers);
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EventResult handle_drag_and_drop_event(DragEvent::Type, CSSPixelPoint, CSSPixelPoint screen_position, unsigned button, unsigned buttons, unsigned modifiers, Vector<HTML::SelectedFile> files);
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EventResult handle_pinch_event(CSSPixelPoint, double scale_delta);
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EventResult handle_keydown(UIEvents::KeyCode, unsigned modifiers, u32 code_point, bool repeat);
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EventResult handle_keyup(UIEvents::KeyCode, unsigned modifiers, u32 code_point, bool repeat);
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void set_mouse_event_tracking_paintable(GC::Ptr<Painting::Paintable>);
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void set_element_resize_in_progress(DOM::Element& element, CSSPixelPoint viewport_position);
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EventResult handle_paste(Utf16String const& text);
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void handle_sdl_input_events();
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void visit_edges(JS::Cell::Visitor& visitor) const;
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Unicode::Segmenter& word_segmenter();
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enum class SelectionMode : u8 {
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None,
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Character,
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Word,
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Paragraph,
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};
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bool is_handling_mouse_selection() const { return m_selection_mode != SelectionMode::None; }
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private:
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EventResult focus_next_element();
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EventResult focus_previous_element();
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EventResult fire_keyboard_event(FlyString const& event_name, HTML::Navigable&, UIEvents::KeyCode, unsigned modifiers, u32 code_point, bool repeat);
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[[nodiscard]] EventResult input_event(FlyString const& event_name, FlyString const& input_type, HTML::Navigable&, Variant<u32, Utf16String> code_point_or_string);
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CSSPixelPoint compute_mouse_event_client_offset(CSSPixelPoint event_page_position) const;
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CSSPixelPoint compute_mouse_event_page_offset(CSSPixelPoint event_client_offset) const;
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CSSPixelPoint compute_mouse_event_movement(CSSPixelPoint event_client_offset) const;
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struct Target {
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GC::Ptr<Painting::Paintable> paintable;
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Optional<int> index_in_node;
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Optional<CSS::CursorPredefined> cursor_override;
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};
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Optional<Target> target_for_mouse_position(CSSPixelPoint position);
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void update_mouse_selection(CSSPixelPoint visual_viewport_position);
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GC::Ptr<Painting::PaintableBox> paint_root();
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GC::Ptr<Painting::PaintableBox const> paint_root() const;
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bool should_ignore_device_input_event() const;
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void handle_gamepad_connected(SDL_JoystickID);
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void handle_gamepad_updated(SDL_JoystickID);
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void handle_gamepad_disconnected(SDL_JoystickID);
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GC::Ref<HTML::Navigable> m_navigable;
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SelectionMode m_selection_mode { SelectionMode::None };
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InputEventsTarget* m_mouse_selection_target { nullptr };
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GC::Ptr<DOM::Range> m_selection_origin;
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GC::Ptr<Painting::Paintable> m_mouse_event_tracking_paintable;
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NonnullOwnPtr<DragAndDropEventHandler> m_drag_and_drop_event_handler;
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OwnPtr<ElementResizeAction> m_element_resize_in_progress;
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GC::Weak<DOM::EventTarget> m_mousedown_target;
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Optional<CSSPixelPoint> m_mousemove_previous_screen_position;
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OwnPtr<Unicode::Segmenter> m_word_segmenter;
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};
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}
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