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https://github.com/fish-shell/fish-shell.git
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266 lines
9.5 KiB
C++
266 lines
9.5 KiB
C++
/** \file color.cpp Color class implementation
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*/
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#include "color.h"
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#include "fallback.h"
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bool rgb_color_t::try_parse_special(const wcstring &special) {
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bzero(&data, sizeof data);
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const wchar_t *name = special.c_str();
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if (! wcscasecmp(name, L"normal")) {
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this->type = type_normal;
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} else if (! wcscasecmp(name, L"reset")) {
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this->type = type_reset;
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} else if (! wcscasecmp(name, L"ignore")) {
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this->type = type_ignore;
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} else {
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this->type = type_none;
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}
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return this->type != type_none;
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}
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static int parse_hex_digit(wchar_t x) {
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switch (x) {
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case L'0': return 0x0;
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case L'1': return 0x1;
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case L'2': return 0x2;
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case L'3': return 0x3;
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case L'4': return 0x4;
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case L'5': return 0x5;
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case L'6': return 0x6;
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case L'7': return 0x7;
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case L'8': return 0x8;
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case L'9': return 0x9;
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case L'a':case L'A': return 0xA;
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case L'b':case L'B': return 0xB;
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case L'c':case L'C': return 0xC;
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case L'd':case L'D': return 0xD;
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case L'e':case L'E': return 0xE;
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case L'f':case L'F': return 0xF;
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default: return -1;
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}
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}
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static unsigned char convert_color(const unsigned char rgb[3], const uint32_t *colors, size_t color_count) {
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long r = rgb[0], g = rgb[1], b = rgb[2];
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unsigned long best_distance = (unsigned long)(-1);
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unsigned char best_index = (unsigned char)(-1);
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for (unsigned char idx = 0; idx < color_count; idx++) {
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uint32_t color = colors[idx];
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long test_r = (color >> 16) & 0xFF, test_g = (color >> 8) & 0xFF, test_b = (color >> 0) & 0xFF;
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unsigned long distance = 0;
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distance += (r - test_r) * (r - test_r);
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distance += (g - test_g) * (g - test_g);
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distance += (b - test_b) * (b - test_b);
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if (distance <= best_distance) {
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best_index = idx;
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best_distance = distance;
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}
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}
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return best_index;
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}
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bool rgb_color_t::try_parse_rgb(const wcstring &name) {
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bzero(&data, sizeof data);
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/* We support the following style of rgb formats (case insensitive):
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#FA3
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#F3A035
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FA3
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F3A035
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*/
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size_t digit_idx = 0, len = name.size();
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/* Skip any leading # */
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if (len > 0 && name.at(0) == L'#')
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digit_idx++;
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bool success = false;
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size_t i;
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if (len - digit_idx == 3) {
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// type FA3
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for (i=0; i < 3; i++) {
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int val = parse_hex_digit(name.at(digit_idx++));
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if (val < 0) break;
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data.rgb[i] = val*16+val;
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}
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success = (i == 3);
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} else if (len - digit_idx == 6) {
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// type F3A035
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for (i=0; i < 3; i++) {
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int hi = parse_hex_digit(name.at(digit_idx++));
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int lo = parse_hex_digit(name.at(digit_idx++));
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if (lo < 0 || hi < 0) break;
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data.rgb[i] = hi*16+lo;
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}
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success = (i == 3);
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}
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if (success) {
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this->type = type_rgb;
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}
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return success;
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}
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struct named_color_t {
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const wchar_t * name;
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unsigned char idx;
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unsigned char rgb[3];
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};
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static const named_color_t named_colors[11] = {
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{L"black", 0, {0, 0, 0}},
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{L"red", 1, {0xFF, 0, 0}},
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{L"green", 2, {0, 0xFF, 0}},
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{L"brown", 3, {0x72, 0x50, 0}},
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{L"yellow", 3, {0xFF, 0xFF, 0}},
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{L"blue", 4, {0, 0, 0xFF}},
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{L"magenta", 5, {0xFF, 0, 0xFF}},
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{L"purple", 5, {0xFF, 0, 0xFF}},
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{L"cyan", 6, {0, 0xFF, 0xFF}},
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{L"white", 7, {0xFF, 0xFF, 0xFF}},
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{L"normal", 8, {0xFF, 0xFF, 0XFF}}
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};
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bool rgb_color_t::try_parse_named(const wcstring &str) {
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bzero(&data, sizeof data);
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size_t max = sizeof named_colors / sizeof *named_colors;
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for (size_t idx=0; idx < max; idx++) {
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if (0 == wcscasecmp(str.c_str(), named_colors[idx].name)) {
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data.name_idx = named_colors[idx].idx;
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this->type = type_named;
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return true;
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}
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}
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return false;
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}
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static const wchar_t *name_for_color_idx(unsigned char idx) {
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size_t max = sizeof named_colors / sizeof *named_colors;
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for (size_t i=0; i < max; i++) {
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if (named_colors[i].idx == idx) {
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return named_colors[i].name;
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}
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}
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return L"unknown";
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}
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rgb_color_t::rgb_color_t(unsigned char t, unsigned char i) : type(t), flags(), data() {
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data.name_idx = i;
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}
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rgb_color_t rgb_color_t::normal() { return rgb_color_t(type_normal); }
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rgb_color_t rgb_color_t::reset() { return rgb_color_t(type_reset); }
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rgb_color_t rgb_color_t::ignore() { return rgb_color_t(type_ignore); }
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rgb_color_t rgb_color_t::none() { return rgb_color_t(type_none); }
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rgb_color_t rgb_color_t::white() { return rgb_color_t(type_named, 7); }
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rgb_color_t rgb_color_t::black() { return rgb_color_t(type_named, 0); }
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static unsigned char term8_color_for_rgb(const unsigned char rgb[3]) {
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const uint32_t kColors[] = {
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0x000000, //Black
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0xFF0000, //Red
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0x00FF00, //Green
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0x725000, //Brown
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0xFFFF00, //Yellow
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0x0000FF, //Blue
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0xFF00FF, //Magenta
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0xFF00FF, //Purple
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0x00FFFF, //Cyan
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0xFFFFFF, //White
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};
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return convert_color(rgb, kColors, sizeof kColors / sizeof *kColors);
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}
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static unsigned char term256_color_for_rgb(const unsigned char rgb[3]) {
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const uint32_t kColors[240] = {
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0x000000, 0x00005f, 0x000087, 0x0000af, 0x0000d7, 0x0000ff, 0x005f00, 0x005f5f,
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0x005f87, 0x005faf, 0x005fd7, 0x005fff, 0x008700, 0x00875f, 0x008787, 0x0087af,
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0x0087d7, 0x0087ff, 0x00af00, 0x00af5f, 0x00af87, 0x00afaf, 0x00afd7, 0x00afff,
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0x00d700, 0x00d75f, 0x00d787, 0x00d7af, 0x00d7d7, 0x00d7ff, 0x00ff00, 0x00ff5f,
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0x00ff87, 0x00ffaf, 0x00ffd7, 0x00ffff, 0x5f0000, 0x5f005f, 0x5f0087, 0x5f00af,
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0x5f00d7, 0x5f00ff, 0x5f5f00, 0x5f5f5f, 0x5f5f87, 0x5f5faf, 0x5f5fd7, 0x5f5fff,
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0x5f8700, 0x5f875f, 0x5f8787, 0x5f87af, 0x5f87d7, 0x5f87ff, 0x5faf00, 0x5faf5f,
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0x5faf87, 0x5fafaf, 0x5fafd7, 0x5fafff, 0x5fd700, 0x5fd75f, 0x5fd787, 0x5fd7af,
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0x5fd7d7, 0x5fd7ff, 0x5fff00, 0x5fff5f, 0x5fff87, 0x5fffaf, 0x5fffd7, 0x5fffff,
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0x870000, 0x87005f, 0x870087, 0x8700af, 0x8700d7, 0x8700ff, 0x875f00, 0x875f5f,
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0x875f87, 0x875faf, 0x875fd7, 0x875fff, 0x878700, 0x87875f, 0x878787, 0x8787af,
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0x8787d7, 0x8787ff, 0x87af00, 0x87af5f, 0x87af87, 0x87afaf, 0x87afd7, 0x87afff,
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0x87d700, 0x87d75f, 0x87d787, 0x87d7af, 0x87d7d7, 0x87d7ff, 0x87ff00, 0x87ff5f,
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0x87ff87, 0x87ffaf, 0x87ffd7, 0x87ffff, 0xaf0000, 0xaf005f, 0xaf0087, 0xaf00af,
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0xaf00d7, 0xaf00ff, 0xaf5f00, 0xaf5f5f, 0xaf5f87, 0xaf5faf, 0xaf5fd7, 0xaf5fff,
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0xaf8700, 0xaf875f, 0xaf8787, 0xaf87af, 0xaf87d7, 0xaf87ff, 0xafaf00, 0xafaf5f,
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0xafaf87, 0xafafaf, 0xafafd7, 0xafafff, 0xafd700, 0xafd75f, 0xafd787, 0xafd7af,
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0xafd7d7, 0xafd7ff, 0xafff00, 0xafff5f, 0xafff87, 0xafffaf, 0xafffd7, 0xafffff,
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0xd70000, 0xd7005f, 0xd70087, 0xd700af, 0xd700d7, 0xd700ff, 0xd75f00, 0xd75f5f,
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0xd75f87, 0xd75faf, 0xd75fd7, 0xd75fff, 0xd78700, 0xd7875f, 0xd78787, 0xd787af,
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0xd787d7, 0xd787ff, 0xd7af00, 0xd7af5f, 0xd7af87, 0xd7afaf, 0xd7afd7, 0xd7afff,
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0xd7d700, 0xd7d75f, 0xd7d787, 0xd7d7af, 0xd7d7d7, 0xd7d7ff, 0xd7ff00, 0xd7ff5f,
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0xd7ff87, 0xd7ffaf, 0xd7ffd7, 0xd7ffff, 0xff0000, 0xff005f, 0xff0087, 0xff00af,
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0xff00d7, 0xff00ff, 0xff5f00, 0xff5f5f, 0xff5f87, 0xff5faf, 0xff5fd7, 0xff5fff,
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0xff8700, 0xff875f, 0xff8787, 0xff87af, 0xff87d7, 0xff87ff, 0xffaf00, 0xffaf5f,
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0xffaf87, 0xffafaf, 0xffafd7, 0xffafff, 0xffd700, 0xffd75f, 0xffd787, 0xffd7af,
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0xffd7d7, 0xffd7ff, 0xffff00, 0xffff5f, 0xffff87, 0xffffaf, 0xffffd7, 0xffffff,
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0x080808, 0x121212, 0x1c1c1c, 0x262626, 0x303030, 0x3a3a3a, 0x444444, 0x4e4e4e,
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0x585858, 0x626262, 0x6c6c6c, 0x767676, 0x808080, 0x8a8a8a, 0x949494, 0x9e9e9e,
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0xa8a8a8, 0xb2b2b2, 0xbcbcbc, 0xc6c6c6, 0xd0d0d0, 0xdadada, 0xe4e4e4, 0xeeeeee
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};
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return 16 + convert_color(rgb, kColors, sizeof kColors / sizeof *kColors);
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}
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unsigned char rgb_color_t::to_term256_index() const {
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assert(type == type_rgb);
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return term256_color_for_rgb(data.rgb);
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}
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unsigned char rgb_color_t::to_name_index() const {
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assert(type == type_named || type == type_rgb);
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if (type == type_named) {
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return data.name_idx;
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} else if (type == type_rgb) {
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return term8_color_for_rgb(data.rgb);
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} else {
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/* This is an error */
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return -1;
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}
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}
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void rgb_color_t::parse(const wcstring &str) {
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bool success = false;
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if (! success) success = try_parse_special(str);
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if (! success) success = try_parse_named(str);
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if (! success) success = try_parse_rgb(str);
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if (! success) {
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bzero(this->data.rgb, sizeof this->data.rgb);
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this->type = type_none;
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}
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}
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rgb_color_t::rgb_color_t(const wcstring &str) {
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this->parse(str);
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}
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rgb_color_t::rgb_color_t(const std::string &str) {
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this->parse(str2wcstring(str));
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}
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wcstring rgb_color_t::description() const {
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switch (type) {
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case type_none:
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return L"none";
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case type_named:
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return format_string(L"named(%d: %ls)", (int)data.name_idx, name_for_color_idx(data.name_idx));
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case type_rgb:
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return format_string(L"rgb(0x%02x%02x%02x)", data.rgb[0], data.rgb[1], data.rgb[2]);
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case type_reset:
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return L"reset";
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case type_normal:
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return L"normal";
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case type_ignore:
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return L"ignore";
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default:
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abort();
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return L"";
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}
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}
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