Adds ansi_escapes.

Adds minimal WORKSPACE.
2023-05-06 10:54:24 -07:00
parent 2c66d66729
commit 859e5761d4
5 changed files with 380 additions and 0 deletions
--- a/ansi_escapes.h
+++ b/ansi_escapes.h
@@ -0,0 +1,86 @@
+#ifndef CPP_Utils__ansi_escapes_h__
+#define CPP_Utils__ansi_escapes_h__
+/***************************************************************************************
+ * @file ansi_escapes.h                                                                *
+ *                                                                                     *
+ * @brief Defines constants and functions for working with screen colors.              *
+ * @copyright                                                                          *
+ * Copyright 2023 Tom Hicks                                                            *
+ * Licensed under the MIT license see the LICENSE file for details.                    *
+ ***************************************************************************************/
+#include <cstdint>
+#include <ostream>
+#include <vector>
+
+/** \addtogroup Ansi Escape Sequences
+ * @{
+ */
+namespace CPPUtils {
+constexpr uint8_t GetRedComponent(uint32_t color) {
+  return (color & 0x00FF0000) >> 16;
+}
+
+constexpr uint8_t GetGreenComponent(uint32_t color) {
+  return (color & 0x0000FF00) >> 8;
+}
+
+constexpr uint8_t GetBlueComponent(uint32_t color) {
+  return (color & 0x000000FF);
+}
+
+template <typename TChar, typename TTraits>
+auto& Escape(std::basic_ostream<TChar, TTraits>& os, const std::basic_string<TChar, TTraits>& escape_code) {
+  return os << "\033[" << escape_code << "m";
+}
+
+template <typename TChar, typename TTraits>
+auto& Escape(std::basic_ostream<TChar, TTraits>& os, const std::basic_string_view<TChar, TTraits>& escape_code) {
+  return os << "\033[" << escape_code << "m";
+}
+
+template <typename TChar, typename TTraits>
+auto& Escape(std::basic_ostream<TChar, TTraits>& os, const TChar* escape_code) {
+  return os << "\033[" << escape_code << "m";
+}
+
+template <typename TChar, typename TTraits>
+auto& ForegroundColor8Bit(std::basic_ostream<TChar, TTraits>& os, uint8_t color) {
+  return Escape(os, "38;5;" + std::to_string(color));
+}
+
+template <typename TChar, typename TTraits>
+auto& BackgroundColor8Bit(std::basic_ostream<TChar, TTraits>& os, uint8_t color) {
+  return Escape(os, "48;5;" + std::to_string(color));
+}
+
+template <typename TChar, typename TTraits>
+auto& ForegroundTrueColor(std::basic_ostream<TChar, TTraits>& os, uint8_t red, uint8_t green, uint8_t blue) {
+  return os << "\033["
+            << "38;2;" << (uint16_t)red << ";" << (uint16_t)green << ";" << (uint16_t)blue << "m";
+}
+
+template <typename TChar, typename TTraits>
+auto& ForegroundTrueColor(std::basic_ostream<TChar, TTraits>& os, uint32_t color) {
+  return ForegroundTrueColor(os, GetRedComponent(color), GetGreenComponent(color), GetBlueComponent(color));
+}
+
+template <typename TChar, typename TTraits>
+auto& BackgroundTrueColor(std::basic_ostream<TChar, TTraits>& os, uint8_t red, uint8_t green, uint8_t blue) {
+  return os << "\033["
+            << "48;2;" << (uint16_t)red << ";" << (uint16_t)green << ";" << (uint16_t)blue << "m";
+}
+
+template <typename TChar, typename TTraits>
+auto& BackgroundTrueColor(std::basic_ostream<TChar, TTraits>& os, uint32_t color) {
+  return BackgroundTrueColor(os, GetRedComponent(color), GetGreenComponent(color), GetBlueComponent(color));
+}
+
+template <typename TChar, typename TTraits>
+auto& Reset(std::basic_ostream<TChar, TTraits>& os) {
+  return os << "\033["
+            << "m";
+}
+}  // End namespace CPPUtils
+
+/** @}*/
+#endif  // End !defined CPP_Utils__ansi_escapes_h__