mirror of
https://github.com/ArthurSonzogni/FTXUI.git
synced 2024-10-06 12:03:35 +08:00
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>
98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
#ifndef FTXUI_SCREEN_SCREEN
|
|
#define FTXUI_SCREEN_SCREEN
|
|
|
|
#include <memory>
|
|
#include <string> // for string, allocator, basic_string
|
|
#include <vector> // for vector
|
|
|
|
#include "ftxui/screen/box.hpp" // for Box
|
|
#include "ftxui/screen/color.hpp" // for Color, Color::Default
|
|
#include "ftxui/screen/terminal.hpp" // for Dimensions
|
|
|
|
namespace ftxui {
|
|
|
|
/// @brief A unicode character and its associated style.
|
|
/// @ingroup screen
|
|
struct Pixel {
|
|
// The graphemes stored into the pixel. To support combining characters,
|
|
// like: a⃦, this can potentially contains multiple codepoitns.
|
|
std::string character = " ";
|
|
|
|
// Colors:
|
|
Color background_color = Color::Default;
|
|
Color foreground_color = Color::Default;
|
|
|
|
// A bit field representing the style:
|
|
bool blink : 1;
|
|
bool bold : 1;
|
|
bool dim : 1;
|
|
bool inverted : 1;
|
|
bool underlined : 1;
|
|
|
|
Pixel()
|
|
: blink(false),
|
|
bold(false),
|
|
dim(false),
|
|
inverted(false),
|
|
underlined(false) {}
|
|
};
|
|
|
|
/// @brief Define how the Screen's dimensions should look like.
|
|
/// @ingroup screen
|
|
namespace Dimension {
|
|
Dimensions Fixed(int);
|
|
Dimensions Full();
|
|
} // namespace Dimension
|
|
|
|
/// @brief A rectangular grid of Pixel.
|
|
/// @ingroup screen
|
|
class Screen {
|
|
public:
|
|
// Constructors:
|
|
Screen(int dimx, int dimy);
|
|
static Screen Create(Dimensions dimension);
|
|
static Screen Create(Dimensions width, Dimensions height);
|
|
|
|
// Node write into the screen using Screen::at.
|
|
std::string& at(int x, int y);
|
|
Pixel& PixelAt(int x, int y);
|
|
|
|
// Convert the screen into a printable string in the terminal.
|
|
std::string ToString();
|
|
void Print();
|
|
|
|
// Get screen dimensions.
|
|
int dimx() { return dimx_; }
|
|
int dimy() { return dimy_; }
|
|
|
|
// Move the terminal cursor n-lines up with n = dimy().
|
|
std::string ResetPosition(bool clear = false);
|
|
|
|
// Fill with space.
|
|
void Clear();
|
|
|
|
void ApplyShader();
|
|
Box stencil;
|
|
|
|
struct Cursor {
|
|
int x = 0;
|
|
int y = 0;
|
|
};
|
|
Cursor cursor() const { return cursor_; }
|
|
void SetCursor(Cursor cursor) { cursor_ = cursor; }
|
|
|
|
protected:
|
|
int dimx_;
|
|
int dimy_;
|
|
std::vector<std::vector<Pixel>> pixels_;
|
|
Cursor cursor_;
|
|
};
|
|
|
|
} // namespace ftxui
|
|
|
|
#endif /* end of include guard: FTXUI_SCREEN_SCREEN */
|
|
|
|
// Copyright 2020 Arthur Sonzogni. All rights reserved.
|
|
// Use of this source code is governed by the MIT license that can be found in
|
|
// the LICENSE file.
|