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427 lines
14 KiB
C++
427 lines
14 KiB
C++
/* Copyright 2021 Aristocratos (jakob@qvantnet.com)
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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indent = tab
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tab-size = 4
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*/
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#include <cmath>
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#include <vector>
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#include <ranges>
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#include <algorithm>
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#include <fstream>
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#include <btop_tools.hpp>
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#include <btop_config.hpp>
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#include <btop_theme.hpp>
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using std::round, std::vector, std::stoi, std::views::iota,
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std::clamp, std::max, std::min, std::ceil, std::to_string;
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using namespace Tools;
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namespace rng = std::ranges;
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namespace fs = std::filesystem;
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string Term::fg, Term::bg;
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string Fx::reset = reset_base;
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namespace Theme {
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fs::path theme_dir;
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fs::path user_theme_dir;
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vector<string> themes;
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unordered_flat_map<string, string> colors;
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unordered_flat_map<string, array<int, 3>> rgbs;
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unordered_flat_map<string, array<string, 101>> gradients;
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const unordered_flat_map<string, string> Default_theme = {
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{ "main_bg", "#00" },
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{ "main_fg", "#cc" },
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{ "title", "#ee" },
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{ "hi_fg", "#969696" },
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{ "selected_bg", "#7e2626" },
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{ "selected_fg", "#ee" },
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{ "inactive_fg", "#40" },
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{ "graph_text", "#60" },
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{ "meter_bg", "#40" },
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{ "proc_misc", "#0de756" },
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{ "cpu_box", "#3d7b46" },
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{ "mem_box", "#8a882e" },
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{ "net_box", "#423ba5" },
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{ "proc_box", "#923535" },
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{ "div_line", "#30" },
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{ "temp_start", "#4897d4" },
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{ "temp_mid", "#5474e8" },
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{ "temp_end", "#ff40b6" },
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{ "cpu_start", "#50f095" },
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{ "cpu_mid", "#f2e266" },
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{ "cpu_end", "#fa1e1e" },
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{ "free_start", "#223014" },
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{ "free_mid", "#b5e685" },
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{ "free_end", "#dcff85" },
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{ "cached_start", "#0b1a29" },
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{ "cached_mid", "#74e6fc" },
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{ "cached_end", "#26c5ff" },
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{ "available_start", "#292107" },
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{ "available_mid", "#ffd77a" },
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{ "available_end", "#ffb814" },
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{ "used_start", "#3b1f1c" },
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{ "used_mid", "#d9626d" },
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{ "used_end", "#ff4769" },
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{ "download_start", "#231a63" },
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{ "download_mid", "#4f43a3" },
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{ "download_end", "#b0a9de" },
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{ "upload_start", "#510554" },
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{ "upload_mid", "#7d4180" },
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{ "upload_end", "#dcafde" },
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{ "process_start", "#80d0a3" },
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{ "process_mid", "#dcd179" },
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{ "process_end", "#d45454" }
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};
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const unordered_flat_map<string, string> TTY_theme = {
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{ "main_bg", "\x1b[0;40m" },
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{ "main_fg", "\x1b[37m" },
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{ "title", "\x1b[97m" },
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{ "hi_fg", "\x1b[31m" },
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{ "selected_bg", "\x1b[41m" },
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{ "selected_fg", "\x1b[97m" },
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{ "inactive_fg", "\x1b[90m" },
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{ "graph_text", "\x1b[37m" },
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{ "meter_bg", "\x1b[90m" },
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{ "proc_misc", "\x1b[92m" },
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{ "cpu_box", "\x1b[32m" },
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{ "mem_box", "\x1b[33m" },
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{ "net_box", "\x1b[35m" },
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{ "proc_box", "\x1b[31m" },
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{ "div_line", "\x1b[90m" },
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{ "temp_start", "\x1b[94m" },
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{ "temp_mid", "\x1b[96m" },
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{ "temp_end", "\x1b[95m" },
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{ "cpu_start", "\x1b[92m" },
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{ "cpu_mid", "\x1b[93m" },
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{ "cpu_end", "\x1b[91m" },
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{ "free_start", "\x1b[32m" },
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{ "free_mid", "" },
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{ "free_end", "\x1b[92m" },
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{ "cached_start", "\x1b[36m" },
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{ "cached_mid", "" },
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{ "cached_end", "\x1b[96m" },
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{ "available_start", "\x1b[33m" },
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{ "available_mid", "" },
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{ "available_end", "\x1b[93m" },
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{ "used_start", "\x1b[31m" },
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{ "used_mid", "" },
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{ "used_end", "\x1b[91m" },
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{ "download_start", "\x1b[34m" },
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{ "download_mid", "" },
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{ "download_end", "\x1b[94m" },
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{ "upload_start", "\x1b[35m" },
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{ "upload_mid", "" },
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{ "upload_end", "\x1b[95m" },
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{ "process_start", "\x1b[32m" },
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{ "process_mid", "\x1b[33m" },
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{ "process_end", "\x1b[31m" }
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};
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namespace {
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//* Convert 24-bit colors to 256 colors
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int truecolor_to_256(const int& r, const int& g, const int& b) {
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//? Use upper 232-255 greyscale values if the downscaled red, green and blue are the same value
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if (int red = round((double)r / 11); red == round((double)g / 11) and round((double)g / 11) == round((double)b / 11)) {
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return 232 + red;
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}
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//? Else use 6x6x6 color cube to calculate approximate colors
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else {
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return round((double)r / 51) * 36 + round((double)g / 51) * 6 + round((double)b / 51) + 16;
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}
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}
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}
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string hex_to_color(string hexa, const bool& t_to_256, const string& depth) {
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if (hexa.size() > 1) {
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hexa.erase(0, 1);
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for (auto& c : hexa) if (not isxdigit(c)) {
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Logger::error("Invalid hex value: " + hexa);
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return "";
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}
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string pre = Fx::e + (depth == "fg" ? "38" : "48") + ";" + (t_to_256 ? "5;" : "2;");
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if (hexa.size() == 2) {
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int h_int = stoi(hexa, 0, 16);
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if (t_to_256) {
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return pre + to_string(truecolor_to_256(h_int, h_int, h_int)) + "m";
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} else {
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string h_str = to_string(h_int);
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return pre + h_str + ";" + h_str + ";" + h_str + "m";
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}
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}
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else if (hexa.size() == 6) {
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if (t_to_256) {
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return pre + to_string(truecolor_to_256(
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stoi(hexa.substr(0, 2), 0, 16),
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stoi(hexa.substr(2, 2), 0, 16),
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stoi(hexa.substr(4, 2), 0, 16))) + "m";
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} else {
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return pre +
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to_string(stoi(hexa.substr(0, 2), 0, 16)) + ";" +
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to_string(stoi(hexa.substr(2, 2), 0, 16)) + ";" +
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to_string(stoi(hexa.substr(4, 2), 0, 16)) + "m";
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}
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}
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else Logger::error("Invalid size of hex value: " + hexa);
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}
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else Logger::error("Hex value missing: " + hexa);
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return "";
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}
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string dec_to_color(int r, int g, int b, const bool& t_to_256, const string& depth) {
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string pre = Fx::e + (depth == "fg" ? "38" : "48") + ";" + (t_to_256 ? "5;" : "2;");
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r = std::clamp(r, 0, 255);
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g = std::clamp(g, 0, 255);
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b = std::clamp(b, 0, 255);
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if (t_to_256) return pre + to_string(truecolor_to_256(r, g, b)) + "m";
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else return pre + to_string(r) + ";" + to_string(g) + ";" + to_string(b) + "m";
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}
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namespace {
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//* Convert hex color to a array of decimals
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array<int, 3> hex_to_dec(string hexa) {
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if (hexa.size() > 1) {
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hexa.erase(0, 1);
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for (auto& c : hexa) if (not isxdigit(c)) return array<int, 3>{-1, -1, -1};
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if (hexa.size() == 2) {
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int h_int = stoi(hexa, 0, 16);
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return array<int, 3>{h_int, h_int, h_int};
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}
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else if (hexa.size() == 6) {
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return array<int, 3>{
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stoi(hexa.substr(0, 2), 0, 16),
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stoi(hexa.substr(2, 2), 0, 16),
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stoi(hexa.substr(4, 2), 0, 16)
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};
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}
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}
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return {-1 ,-1 ,-1};
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}
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//* Generate colors and rgb decimal vectors for the theme
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void generateColors(const unordered_flat_map<string, string>& source) {
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vector<string> t_rgb;
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string depth;
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const bool& t_to_256 = Config::getB("lowcolor");
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colors.clear(); rgbs.clear();
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for (const auto& [name, color] : Default_theme) {
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if (name == "main_bg" and not Config::getB("theme_background")) {
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colors[name] = "\x1b[49m";
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rgbs[name] = {-1, -1, -1};
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continue;
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}
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depth = (name.ends_with("bg") and name != "meter_bg") ? "bg" : "fg";
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if (source.contains(name)) {
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if (name == "main_bg" and source.at(name).empty()) {
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colors[name] = "\x1b[49m";
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rgbs[name] = {-1, -1, -1};
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continue;
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}
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else if (source.at(name).empty() and (name.ends_with("_mid") or name.ends_with("_end"))) {
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colors[name] = "";
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rgbs[name] = {-1, -1, -1};
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continue;
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}
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else if (source.at(name).starts_with('#')) {
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colors[name] = hex_to_color(source.at(name), t_to_256, depth);
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rgbs[name] = hex_to_dec(source.at(name));
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}
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else if (not source.at(name).empty()) {
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t_rgb = ssplit(source.at(name));
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if (t_rgb.size() != 3)
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Logger::error("Invalid RGB decimal value: \"" + source.at(name) + "\"");
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else {
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colors[name] = dec_to_color(stoi(t_rgb[0]), stoi(t_rgb[1]), stoi(t_rgb[2]), t_to_256, depth);
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rgbs[name] = array<int, 3>{stoi(t_rgb[0]), stoi(t_rgb[1]), stoi(t_rgb[2])};
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}
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}
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}
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if (not colors.contains(name) and not is_in(name, "meter_bg", "process_start", "process_mid", "process_end", "graph_text")) {
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Logger::debug("Missing color value for \"" + name + "\". Using value from default.");
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colors[name] = hex_to_color(color, t_to_256, depth);
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rgbs[name] = hex_to_dec(color);
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}
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}
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//? Set fallback values for optional colors not defined in theme file
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if (not colors.contains("meter_bg")) {
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colors["meter_bg"] = colors.at("inactive_fg");
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rgbs["meter_bg"] = rgbs.at("inactive_fg");
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}
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if (not colors.contains("process_start")) {
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colors["process_start"] = colors.at("cpu_start");
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colors["process_mid"] = colors.at("cpu_mid");
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colors["process_end"] = colors.at("cpu_end");
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rgbs["process_start"] = rgbs.at("cpu_start");
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rgbs["process_mid"] = rgbs.at("cpu_mid");
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rgbs["process_end"] = rgbs.at("cpu_end");
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}
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if (not colors.contains("graph_text")) {
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colors["graph_text"] = colors.at("inactive_fg");
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rgbs["graph_text"] = rgbs.at("inactive_fg");
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}
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}
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//* Generate color gradients from two or three colors, 101 values indexed 0-100
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void generateGradients() {
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gradients.clear();
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const bool& t_to_256 = Config::getB("lowcolor");
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//? Insert values for processes greyscale gradient and processes color gradient
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rgbs.insert({ { "proc_start", rgbs["main_fg"] },
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{ "proc_mid", {-1, -1, -1} },
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{ "proc_end", rgbs["inactive_fg"] },
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{ "proc_color_start", rgbs["inactive_fg"] },
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{ "proc_color_mid", {-1, -1, -1} },
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{ "proc_color_end", rgbs["process_start"] },
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});
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for (const auto& [name, source_arr] : rgbs) {
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if (not name.ends_with("_start")) continue;
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const string color_name = rtrim(name, "_start");
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//? input_colors[start,mid,end][red,green,blue]
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const array<array<int, 3>, 3> input_colors = {
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source_arr,
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rgbs[color_name + "_mid"],
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rgbs[color_name + "_end"]
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};
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//? output_colors[red,green,blue][0-100]
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array<array<int, 3>, 101> output_colors;
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output_colors[0][0] = -1;
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//? Only start iteration if gradient has an end color defined
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if (input_colors[2][0] >= 0) {
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//? Split iteration in two passes of 50 + 51 instead of one pass of 101 if gradient has start, mid and end values defined
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int current_range = (input_colors[1][0] >= 0) ? 50 : 100;
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for (const int& rgb : iota(0, 3)) {
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int start = 0, offset = 0;
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int end = (current_range == 50) ? 1 : 2;
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for (const int& i : iota(0, 101)) {
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output_colors[i][rgb] = input_colors[start][rgb] + (i - offset) * (input_colors[end][rgb] - input_colors[start][rgb]) / current_range;
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//? Switch source arrays from start->mid to mid->end at 50 passes if mid is defined
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if (i == current_range) { ++start; ++end; offset = 50; }
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}
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}
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}
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//? Generate color escape codes for the generated rgb decimals
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array<string, 101> color_gradient;
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if (output_colors[0][0] != -1) {
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for (int y = 0; const auto& [red, green, blue] : output_colors)
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color_gradient[y++] = dec_to_color(red, green, blue, t_to_256);
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}
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else {
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//? If only start was defined fill array with start color
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color_gradient.fill(colors[name]);
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}
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gradients[color_name] = std::move(color_gradient);
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}
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}
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//* Set colors and generate gradients for the TTY theme
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void generateTTYColors() {
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rgbs.clear();
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gradients.clear();
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colors = TTY_theme;
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for (const auto& c : colors) {
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if (not c.first.ends_with("_start")) continue;
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const string base_name = rtrim(c.first, "_start");
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string section = "_start";
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int split = colors.at(base_name + "_mid").empty() ? 50 : 33;
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for (const int& i : iota(0, 101)) {
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gradients[base_name][i] = colors.at(base_name + section);
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if (i == split) {
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section = (split == 33) ? "_mid" : "_end";
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split *= 2;
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}
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}
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}
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}
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//* Load a .theme file from disk
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auto loadFile(const string& filename) {
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unordered_flat_map<string, string> theme_out;
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const fs::path filepath = filename;
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if (not fs::exists(filepath))
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return Default_theme;
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std::ifstream themefile(filepath);
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if (themefile.good()) {
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Logger::debug("Loading theme file: " + filename);
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while (not themefile.bad()) {
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themefile.ignore(SSmax, '[');
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if (themefile.eof()) break;
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string name, value;
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getline(themefile, name, ']');
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if (not Default_theme.contains(name)) {
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continue;
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}
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themefile.ignore(SSmax, '=');
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themefile >> std::ws;
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if (themefile.eof()) break;
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if (themefile.peek() == '"') {
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themefile.ignore(1);
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getline(themefile, value, '"');
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}
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else getline(themefile, value, '\n');
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theme_out[name] = value;
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}
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return theme_out;
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}
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return Default_theme;
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}
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}
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void updateThemes() {
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themes.clear();
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themes.push_back("Default");
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themes.push_back("TTY");
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for (const auto& path : { theme_dir, user_theme_dir } ) {
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if (path.empty()) continue;
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for (auto& file : fs::directory_iterator(path)) {
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if (file.path().extension() == ".theme" and access(file.path().c_str(), R_OK) != -1) {
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themes.push_back(file.path().c_str());
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}
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}
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}
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}
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void setTheme() {
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string theme = Config::getS("color_theme");
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if (theme == "TTY" or Config::getB("tty_mode"))
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generateTTYColors();
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else {
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generateColors((theme == "Default" ? Default_theme : loadFile(theme)));
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generateGradients();
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}
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Term::fg = colors.at("main_fg");
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Term::bg = colors.at("main_bg");
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Fx::reset = Fx::reset_base + Term::fg + Term::bg;
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}
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} |