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3b4ab618a3
In the past, FTXUI switched from std::string to std::wstring to support fullwidth characters. The reasons was that fullwidth characters can be stored inside a single wchar_t. Then FTXUI added support for combining characters. A single glygh doesn't even fit a wchar_t. Instead, a glyph can be arbitrary large. The usage of wstring doesn't really fit the new model and have several drawbacks: 1. It doesn't simplify the implementation of FTXUI, because of combining characters. 2. It reduces drawing performance by 2x. 3. It increase Screen's memory allocation by 2x. This patch converts FTXUI to use std::string internally. It now exposes std::string based API. The std::wstring API remains, but is now deprecated. Tests and examples haven't been update to show the breakage is limited. They will be updated in a second set of patches. Bug: https://github.com/ArthurSonzogni/FTXUI/issues/153 Co-authored-by: Tushar Maheshwari <tushar27192@gmail.com>
109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
#ifndef FTXUI_COMPONENT_EVENT_HPP
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#define FTXUI_COMPONENT_EVENT_HPP
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#include <ftxui/component/mouse.hpp> // for Mouse
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#include <string> // for string, operator==
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#include <vector>
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namespace ftxui {
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class ScreenInteractive;
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class ComponentBase;
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/// @brief Represent an event. It can be key press event, a terminal resize, or
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/// more ...
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///
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/// For example:
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/// - Printable character can be created using Event::Character('a').
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/// - Some special are predefined, like Event::ArrowLeft.
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/// - One can find arbitrary code for special Events using:
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/// ./example/util/print_key_press
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/// For instance, CTLR+A maps to Event::Special({1});
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///
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/// Useful documentation about xterm specification:
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/// https://invisible-island.net/xterm/ctlseqs/ctlseqs.html
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struct Event {
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// --- Constructor section ---------------------------------------------------
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static Event Character(std::string);
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static Event Character(char);
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static Event Character(wchar_t);
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static Event Special(std::string);
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static Event Mouse(std::string, Mouse mouse);
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static Event CursorReporting(std::string, int x, int y);
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// --- Arrow ---
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static const Event ArrowLeft;
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static const Event ArrowRight;
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static const Event ArrowUp;
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static const Event ArrowDown;
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// --- Other ---
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static const Event Backspace;
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static const Event Delete;
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static const Event Return;
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static const Event Escape;
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static const Event Tab;
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static const Event TabReverse;
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static const Event F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11, F12;
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static const Event Home;
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static const Event End;
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static const Event PageUp;
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static const Event PageDown;
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// --- Custom ---
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static Event Custom;
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//--- Method section ---------------------------------------------------------
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bool is_character() const { return type_ == Type::Character; }
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std::string character() const { return input_; }
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bool is_mouse() const { return type_ == Type::Mouse; }
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struct Mouse& mouse() {
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return mouse_;
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}
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bool is_cursor_reporting() const { return type_ == Type::CursorReporting; }
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int cursor_x() const { return cursor_.x; }
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int cursor_y() const { return cursor_.y; }
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const std::string& input() const { return input_; }
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bool operator==(const Event& other) const { return input_ == other.input_; }
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bool operator!=(const Event& other) const { return !operator==(other); }
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//--- State section ----------------------------------------------------------
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private:
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friend ComponentBase;
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friend ScreenInteractive;
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enum class Type {
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Unknown,
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Character,
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Mouse,
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CursorReporting,
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};
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Type type_ = Type::Unknown;
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struct Cursor {
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int x;
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int y;
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};
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union {
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struct Mouse mouse_;
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struct Cursor cursor_;
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};
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std::string input_;
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ScreenInteractive* screen_ = nullptr;
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};
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} // namespace ftxui
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#endif /* end of include guard: FTXUI_COMPONENT_EVENT_HPP */
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// Copyright 2020 Arthur Sonzogni. All rights reserved.
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// Use of this source code is governed by the MIT license that can be found in
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// the LICENSE file.
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