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LibWeb: Add a basic KeyboardEvent and fire "keydown" events :^)
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9 changed files with 221 additions and 4 deletions
110
Userland/Libraries/LibWeb/UIEvents/KeyboardEvent.cpp
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110
Userland/Libraries/LibWeb/UIEvents/KeyboardEvent.cpp
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/*
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* Copyright (c) 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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#include <AK/CharacterTypes.h>
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#include <LibWeb/UIEvents/KeyboardEvent.h>
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namespace Web::UIEvents {
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// https://www.w3.org/TR/uievents/#determine-keydown-keyup-keyCode
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static unsigned long determine_key_code(KeyCode platform_key, u32 code_point)
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{
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// If input key when pressed without modifiers would insert a numerical character (0-9), return the ASCII code of that numerical character.
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if (is_ascii_digit(code_point))
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return code_point;
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// If input key when pressed without modifiers would insert a lower case character in the a-z alphabetical range, return the ASCII code of the upper case equivalent.
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if (is_ascii_lower_alpha(code_point))
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return to_ascii_uppercase(code_point);
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// If the key’s function, as determined in an implementation-specific way, corresponds to one of the keys in the §8.3.3 Fixed virtual key codes table, return the corresponding key code.
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// https://www.w3.org/TR/uievents/#fixed-virtual-key-codes
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switch (platform_key) {
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case KeyCode::Key_Backspace:
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return 8;
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case KeyCode::Key_Tab:
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return 9;
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case KeyCode::Key_Return:
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return 13;
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case KeyCode::Key_Shift:
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return 16;
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case KeyCode::Key_Control:
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return 17;
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case KeyCode::Key_Alt:
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return 18;
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case KeyCode::Key_CapsLock:
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return 20;
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case KeyCode::Key_Escape:
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return 27;
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case KeyCode::Key_Space:
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return 32;
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case KeyCode::Key_PageUp:
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return 33;
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case KeyCode::Key_PageDown:
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return 34;
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case KeyCode::Key_End:
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return 35;
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case KeyCode::Key_Home:
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return 36;
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case KeyCode::Key_Left:
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return 37;
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case KeyCode::Key_Up:
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return 38;
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case KeyCode::Key_Right:
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return 39;
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case KeyCode::Key_Down:
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return 40;
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default:
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break;
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}
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// Return the virtual key code from the operating system.
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return platform_key;
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}
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NonnullRefPtr<KeyboardEvent> KeyboardEvent::create_from_platform_event(FlyString event_name, KeyCode platform_key, unsigned modifiers, u32 code_point)
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{
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// FIXME: Figure out what these should actually contain.
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String event_key = key_code_to_string(platform_key);
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String event_code = "FIXME";
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auto key_code = determine_key_code(platform_key, code_point);
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return KeyboardEvent::create(move(event_name), move(event_key), move(event_code), 0, modifiers & Mod_Ctrl, modifiers & Mod_Shift, modifiers & Mod_Alt, false, false, false, key_code, code_point);
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}
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KeyboardEvent::KeyboardEvent(FlyString event_name, String key, String code, unsigned long location, bool ctrl_key, bool shift_key, bool alt_key, bool meta_key, bool repeat, bool is_composing, unsigned long key_code, unsigned long char_code)
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: UIEvent(move(event_name))
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, m_key(move(key))
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, m_code(move(code))
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, m_location(location)
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, m_ctrl_key(ctrl_key)
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, m_shift_key(shift_key)
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, m_alt_key(alt_key)
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, m_meta_key(meta_key)
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, m_repeat(repeat)
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, m_is_composing(is_composing)
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, m_key_code(key_code)
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, m_char_code(char_code)
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{
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}
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KeyboardEvent::~KeyboardEvent()
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{
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}
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bool KeyboardEvent::get_modifier_state(String const& key_arg)
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{
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if (key_arg == "Alt")
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return m_alt_key;
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if (key_arg == "Control")
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return m_ctrl_key;
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if (key_arg == "Shift")
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return m_shift_key;
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if (key_arg == "Meta")
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return m_meta_key;
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return false;
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}
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}
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