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-rw-r--r--src/web_buffer_svg.c616
1 files changed, 616 insertions, 0 deletions
diff --git a/src/web_buffer_svg.c b/src/web_buffer_svg.c
new file mode 100644
index 00000000..2f7627cc
--- /dev/null
+++ b/src/web_buffer_svg.c
@@ -0,0 +1,616 @@
+#include "common.h"
+
+#define BADGE_HORIZONTAL_PADDING 4
+#define VERDANA_KERNING 0.2
+#define VERDANA_PADDING 1.0
+
+/*
+ * verdana11_widths[] has been generated with this method:
+ * https://github.com/badges/shields/blob/master/measure-text.js
+*/
+
+double verdana11_widths[256] = {
+ [0] = 0.0,
+ [1] = 0.0,
+ [2] = 0.0,
+ [3] = 0.0,
+ [4] = 0.0,
+ [5] = 0.0,
+ [6] = 0.0,
+ [7] = 0.0,
+ [8] = 0.0,
+ [9] = 0.0,
+ [10] = 0.0,
+ [11] = 0.0,
+ [12] = 0.0,
+ [13] = 0.0,
+ [14] = 0.0,
+ [15] = 0.0,
+ [16] = 0.0,
+ [17] = 0.0,
+ [18] = 0.0,
+ [19] = 0.0,
+ [20] = 0.0,
+ [21] = 0.0,
+ [22] = 0.0,
+ [23] = 0.0,
+ [24] = 0.0,
+ [25] = 0.0,
+ [26] = 0.0,
+ [27] = 0.0,
+ [28] = 0.0,
+ [29] = 0.0,
+ [30] = 0.0,
+ [31] = 0.0,
+ [32] = 3.8671874999999996, //
+ [33] = 4.3291015625, // !
+ [34] = 5.048828125, // "
+ [35] = 9.001953125, // #
+ [36] = 6.9931640625, // $
+ [37] = 11.837890625, // %
+ [38] = 7.992187499999999, // &
+ [39] = 2.9541015625, // '
+ [40] = 4.9951171875, // (
+ [41] = 4.9951171875, // )
+ [42] = 6.9931640625, // *
+ [43] = 9.001953125, // +
+ [44] = 4.00146484375, // ,
+ [45] = 4.9951171875, // -
+ [46] = 4.00146484375, // .
+ [47] = 4.9951171875, // /
+ [48] = 6.9931640625, // 0
+ [49] = 6.9931640625, // 1
+ [50] = 6.9931640625, // 2
+ [51] = 6.9931640625, // 3
+ [52] = 6.9931640625, // 4
+ [53] = 6.9931640625, // 5
+ [54] = 6.9931640625, // 6
+ [55] = 6.9931640625, // 7
+ [56] = 6.9931640625, // 8
+ [57] = 6.9931640625, // 9
+ [58] = 4.9951171875, // :
+ [59] = 4.9951171875, // ;
+ [60] = 9.001953125, // <
+ [61] = 9.001953125, // =
+ [62] = 9.001953125, // >
+ [63] = 5.99951171875, // ?
+ [64] = 11.0, // @
+ [65] = 7.51953125, // A
+ [66] = 7.541015625, // B
+ [67] = 7.680664062499999, // C
+ [68] = 8.4755859375, // D
+ [69] = 6.95556640625, // E
+ [70] = 6.32177734375, // F
+ [71] = 8.529296875, // G
+ [72] = 8.26611328125, // H
+ [73] = 4.6298828125, // I
+ [74] = 5.00048828125, // J
+ [75] = 7.62158203125, // K
+ [76] = 6.123046875, // L
+ [77] = 9.2705078125, // M
+ [78] = 8.228515625, // N
+ [79] = 8.658203125, // O
+ [80] = 6.63330078125, // P
+ [81] = 8.658203125, // Q
+ [82] = 7.6484375, // R
+ [83] = 7.51953125, // S
+ [84] = 6.7783203125, // T
+ [85] = 8.05126953125, // U
+ [86] = 7.51953125, // V
+ [87] = 10.87646484375, // W
+ [88] = 7.53564453125, // X
+ [89] = 6.767578125, // Y
+ [90] = 7.53564453125, // Z
+ [91] = 4.9951171875, // [
+ [92] = 4.9951171875, // backslash
+ [93] = 4.9951171875, // ]
+ [94] = 9.001953125, // ^
+ [95] = 6.9931640625, // _
+ [96] = 6.9931640625, // `
+ [97] = 6.6064453125, // a
+ [98] = 6.853515625, // b
+ [99] = 5.73095703125, // c
+ [100] = 6.853515625, // d
+ [101] = 6.552734375, // e
+ [102] = 3.8671874999999996, // f
+ [103] = 6.853515625, // g
+ [104] = 6.9609375, // h
+ [105] = 3.0185546875, // i
+ [106] = 3.78662109375, // j
+ [107] = 6.509765625, // k
+ [108] = 3.0185546875, // l
+ [109] = 10.69921875, // m
+ [110] = 6.9609375, // n
+ [111] = 6.67626953125, // o
+ [112] = 6.853515625, // p
+ [113] = 6.853515625, // q
+ [114] = 4.6943359375, // r
+ [115] = 5.73095703125, // s
+ [116] = 4.33447265625, // t
+ [117] = 6.9609375, // u
+ [118] = 6.509765625, // v
+ [119] = 9.001953125, // w
+ [120] = 6.509765625, // x
+ [121] = 6.509765625, // y
+ [122] = 5.779296875, // z
+ [123] = 6.982421875, // {
+ [124] = 4.9951171875, // |
+ [125] = 6.982421875, // }
+ [126] = 9.001953125, // ~
+ [127] = 0.0,
+ [128] = 0.0,
+ [129] = 0.0,
+ [130] = 0.0,
+ [131] = 0.0,
+ [132] = 0.0,
+ [133] = 0.0,
+ [134] = 0.0,
+ [135] = 0.0,
+ [136] = 0.0,
+ [137] = 0.0,
+ [138] = 0.0,
+ [139] = 0.0,
+ [140] = 0.0,
+ [141] = 0.0,
+ [142] = 0.0,
+ [143] = 0.0,
+ [144] = 0.0,
+ [145] = 0.0,
+ [146] = 0.0,
+ [147] = 0.0,
+ [148] = 0.0,
+ [149] = 0.0,
+ [150] = 0.0,
+ [151] = 0.0,
+ [152] = 0.0,
+ [153] = 0.0,
+ [154] = 0.0,
+ [155] = 0.0,
+ [156] = 0.0,
+ [157] = 0.0,
+ [158] = 0.0,
+ [159] = 0.0,
+ [160] = 0.0,
+ [161] = 0.0,
+ [162] = 0.0,
+ [163] = 0.0,
+ [164] = 0.0,
+ [165] = 0.0,
+ [166] = 0.0,
+ [167] = 0.0,
+ [168] = 0.0,
+ [169] = 0.0,
+ [170] = 0.0,
+ [171] = 0.0,
+ [172] = 0.0,
+ [173] = 0.0,
+ [174] = 0.0,
+ [175] = 0.0,
+ [176] = 0.0,
+ [177] = 0.0,
+ [178] = 0.0,
+ [179] = 0.0,
+ [180] = 0.0,
+ [181] = 0.0,
+ [182] = 0.0,
+ [183] = 0.0,
+ [184] = 0.0,
+ [185] = 0.0,
+ [186] = 0.0,
+ [187] = 0.0,
+ [188] = 0.0,
+ [189] = 0.0,
+ [190] = 0.0,
+ [191] = 0.0,
+ [192] = 0.0,
+ [193] = 0.0,
+ [194] = 0.0,
+ [195] = 0.0,
+ [196] = 0.0,
+ [197] = 0.0,
+ [198] = 0.0,
+ [199] = 0.0,
+ [200] = 0.0,
+ [201] = 0.0,
+ [202] = 0.0,
+ [203] = 0.0,
+ [204] = 0.0,
+ [205] = 0.0,
+ [206] = 0.0,
+ [207] = 0.0,
+ [208] = 0.0,
+ [209] = 0.0,
+ [210] = 0.0,
+ [211] = 0.0,
+ [212] = 0.0,
+ [213] = 0.0,
+ [214] = 0.0,
+ [215] = 0.0,
+ [216] = 0.0,
+ [217] = 0.0,
+ [218] = 0.0,
+ [219] = 0.0,
+ [220] = 0.0,
+ [221] = 0.0,
+ [222] = 0.0,
+ [223] = 0.0,
+ [224] = 0.0,
+ [225] = 0.0,
+ [226] = 0.0,
+ [227] = 0.0,
+ [228] = 0.0,
+ [229] = 0.0,
+ [230] = 0.0,
+ [231] = 0.0,
+ [232] = 0.0,
+ [233] = 0.0,
+ [234] = 0.0,
+ [235] = 0.0,
+ [236] = 0.0,
+ [237] = 0.0,
+ [238] = 0.0,
+ [239] = 0.0,
+ [240] = 0.0,
+ [241] = 0.0,
+ [242] = 0.0,
+ [243] = 0.0,
+ [244] = 0.0,
+ [245] = 0.0,
+ [246] = 0.0,
+ [247] = 0.0,
+ [248] = 0.0,
+ [249] = 0.0,
+ [250] = 0.0,
+ [251] = 0.0,
+ [252] = 0.0,
+ [253] = 0.0,
+ [254] = 0.0,
+ [255] = 0.0
+};
+
+// find the width of the string using the verdana 11points font
+// re-write the string in place, skiping zero-length characters
+static inline int verdana11_width(char *s) {
+ double w = 0.0;
+ char *d = s;
+
+ while(*s) {
+ double t = verdana11_widths[(unsigned char)*s];
+ if(t == 0.0)
+ s++;
+ else {
+ w += t + VERDANA_KERNING;
+ if(d != s)
+ *d++ = *s++;
+ else
+ d = ++s;
+ }
+ }
+
+ *d = '\0';
+ w -= VERDANA_KERNING;
+ w += VERDANA_PADDING;
+ return ceil(w);
+}
+
+static inline size_t escape_xmlz(char *dst, const char *src, size_t len) {
+ size_t i = len;
+
+ // required escapes from
+ // https://github.com/badges/shields/blob/master/badge.js
+ while(*src && i) {
+ switch(*src) {
+ case '\\':
+ *dst++ = '/';
+ src++;
+ i--;
+ break;
+
+ case '&':
+ if(i > 5) {
+ strcpy(dst, "&amp;");
+ i -= 5;
+ dst += 5;
+ src++;
+ }
+ else goto cleanup;
+ break;
+
+ case '<':
+ if(i > 4) {
+ strcpy(dst, "&lt;");
+ i -= 4;
+ dst += 4;
+ src++;
+ }
+ else goto cleanup;
+ break;
+
+ case '>':
+ if(i > 4) {
+ strcpy(dst, "&gt;");
+ i -= 4;
+ dst += 4;
+ src++;
+ }
+ else goto cleanup;
+ break;
+
+ case '"':
+ if(i > 6) {
+ strcpy(dst, "&quot;");
+ i -= 6;
+ dst += 6;
+ src++;
+ }
+ else goto cleanup;
+ break;
+
+ case '\'':
+ if(i > 6) {
+ strcpy(dst, "&apos;");
+ i -= 6;
+ dst += 6;
+ src++;
+ }
+ else goto cleanup;
+ break;
+
+ default:
+ i--;
+ *dst++ = *src++;
+ break;
+ }
+ }
+
+cleanup:
+ *dst = '\0';
+ return len - i;
+}
+
+static inline const char *fix_units(const char *units) {
+ if(!units || !*units || !strcmp(units, "empty") || !strcmp(units, "null")) return "";
+ if(!strcmp(units, "percentage") || !strcmp(units, "percent") || !strcmp(units, "pcent")) return "%";
+ return units;
+}
+
+static inline const char *color_map(const char *color) {
+ // colors from:
+ // https://github.com/badges/shields/blob/master/colorscheme.json
+ if(!strcmp(color, "brightgreen")) return "#4c1";
+ else if(!strcmp(color, "green")) return "#97CA00";
+ else if(!strcmp(color, "yellow")) return "#dfb317";
+ else if(!strcmp(color, "yellowgreen")) return "#a4a61d";
+ else if(!strcmp(color, "orange")) return "#fe7d37";
+ else if(!strcmp(color, "red")) return "#e05d44";
+ else if(!strcmp(color, "blue")) return "#007ec6";
+ else if(!strcmp(color, "grey")) return "#555";
+ else if(!strcmp(color, "gray")) return "#555";
+ else if(!strcmp(color, "lightgrey")) return "#9f9f9f";
+ else if(!strcmp(color, "lightgray")) return "#9f9f9f";
+ return color;
+}
+
+static inline void calc_colorz(const char *color, char *final, size_t len, calculated_number value, int value_is_null) {
+ char color_buffer[256 + 1] = "";
+ char value_buffer[256 + 1] = "";
+ char comparison = '>';
+
+ // example input:
+ // color<max|color>min|color:null...
+
+ const char *c = color;
+ while(*c) {
+ char *dc = color_buffer, *dv = NULL;
+ size_t ci = 0, vi = 0;
+
+ const char *t = c;
+
+ while(*t && *t != '|') {
+ switch(*t) {
+ case ':':
+ comparison = '=';
+ dv = value_buffer;
+ break;
+
+ case '}':
+ case ')':
+ case '>':
+ if(t[1] == '=') {
+ comparison = ')';
+ t++;
+ }
+ else
+ comparison = '>';
+ dv = value_buffer;
+ break;
+
+ case '{':
+ case '(':
+ case '<':
+ if(t[1] == '=') {
+ comparison = '(';
+ t++;
+ }
+ else
+ comparison = '<';
+ dv = value_buffer;
+ break;
+
+ default:
+ if(dv) {
+ if(vi < 256) {
+ vi++;
+ *dv++ = *t;
+ }
+ }
+ else {
+ if(ci < 256) {
+ ci++;
+ *dc++ = *t;
+ }
+ }
+ break;
+ }
+
+ t++;
+ }
+
+ // prepare for next iteration
+ if(*t == '|') t++;
+ c = t;
+
+ // do the math
+ *dc = '\0';
+ if(dv) {
+ *dv = '\0';
+
+ if(value_is_null) {
+ if(!*value_buffer || !strcmp(value_buffer, "null"))
+ break;
+ }
+ else {
+ calculated_number v = strtold(value_buffer, NULL);
+
+ if(comparison == '<' && value < v) break;
+ else if(comparison == '(' && value <= v) break;
+ else if(comparison == '>' && value > v) break;
+ else if(comparison == ')' && value >= v) break;
+ else if(comparison == '=' && value == v) break;
+ }
+ }
+ else
+ break;
+ }
+
+ const char *b;
+ if(color_buffer[0])
+ b = color_buffer;
+ else
+ b = color;
+
+ strncpyz(final, b, len);
+}
+
+// value + units
+#define VALUE_STRING_SIZE 100
+
+// label
+#define LABEL_STRING_SIZE 200
+
+// colors
+#define COLOR_STRING_SIZE 100
+
+void buffer_svg(BUFFER *wb, const char *label, calculated_number value, const char *units, const char *label_color, const char *value_color, int value_is_null, int precision) {
+ char label_buffer[LABEL_STRING_SIZE + 1]
+ , value_color_buffer[COLOR_STRING_SIZE + 1]
+ , value_string[VALUE_STRING_SIZE + 1]
+ , label_escaped[LABEL_STRING_SIZE + 1]
+ , value_escaped[VALUE_STRING_SIZE + 1]
+ , label_color_escaped[COLOR_STRING_SIZE + 1]
+ , value_color_escaped[COLOR_STRING_SIZE + 1];
+
+ int label_width, value_width, total_width;
+
+ if(unlikely(!label_color || !*label_color))
+ label_color = "#555";
+
+ if(unlikely(!value_color || !*value_color))
+ value_color = (value_is_null)?"#999":"#4c1";
+
+ units = fix_units(units);
+ calc_colorz(value_color, value_color_buffer, COLOR_STRING_SIZE, value, value_is_null);
+
+ char *separator = "";
+ if(unlikely(isalnum(*units)))
+ separator = " ";
+
+ if(unlikely(value_is_null))
+ strcpy(value_string, "-");
+
+ else if(precision < 0) {
+ int len, l, lstop = 0;
+
+ calculated_number abs = value;
+ if(isless(value, 0)) {
+ lstop = 1;
+ abs = -value;
+ }
+
+ if(isgreaterequal(abs, 1000)) len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.0Lf", (long double)value);
+ else if(isgreaterequal(abs, 100)) len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.1Lf", (long double)value);
+ else if(isgreaterequal(abs, 1)) len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.2Lf", (long double)value);
+ else if(isgreaterequal(abs, 0.1)) len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.3Lf", (long double)value);
+ else len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.4Lf", (long double)value);
+
+ // remove trailing zeros
+ for(l = len - 1; l > lstop ; l--) {
+ if(likely(value_string[l] == '0')) {
+ value_string[l] = '\0';
+ len--;
+ }
+
+ else if(unlikely(value_string[l] == '.')) {
+ value_string[l] = '\0';
+ len--;
+ break;
+ }
+
+ else
+ break;
+ }
+
+ if(len >= 0)
+ snprintfz(&value_string[len], VALUE_STRING_SIZE - len, "%s%s", separator, units);
+ }
+ else {
+ if(precision > 50) precision = 50;
+ snprintfz(value_string, VALUE_STRING_SIZE, "%0.*Lf%s%s", precision, (long double)value, separator, units);
+ }
+
+ // we need to copy the label, since verdana11_width may write to it
+ strncpyz(label_buffer, label, LABEL_STRING_SIZE);
+
+ label_width = verdana11_width(label_buffer) + (BADGE_HORIZONTAL_PADDING * 2);
+ value_width = verdana11_width(value_string) + (BADGE_HORIZONTAL_PADDING * 2);
+ total_width = label_width + value_width;
+
+ escape_xmlz(label_escaped, label_buffer, LABEL_STRING_SIZE);
+ escape_xmlz(value_escaped, value_string, VALUE_STRING_SIZE);
+ escape_xmlz(label_color_escaped, color_map(label_color), COLOR_STRING_SIZE);
+ escape_xmlz(value_color_escaped, color_map(value_color_buffer), COLOR_STRING_SIZE);
+
+ wb->contenttype = CT_IMAGE_SVG_XML;
+
+ // svg template from:
+ // https://raw.githubusercontent.com/badges/shields/master/templates/flat-template.svg
+ buffer_sprintf(wb,
+ "<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"%d\" height=\"20\">"
+ "<linearGradient id=\"smooth\" x2=\"0\" y2=\"100%%\">"
+ "<stop offset=\"0\" stop-color=\"#bbb\" stop-opacity=\".1\"/>"
+ "<stop offset=\"1\" stop-opacity=\".1\"/>"
+ "</linearGradient>"
+ "<mask id=\"round\">"
+ "<rect width=\"%d\" height=\"20\" rx=\"3\" fill=\"#fff\"/>"
+ "</mask>"
+ "<g mask=\"url(#round)\">"
+ "<rect width=\"%d\" height=\"20\" fill=\"%s\"/>"
+ "<rect x=\"%d\" width=\"%d\" height=\"20\" fill=\"%s\"/>"
+ "<rect width=\"%d\" height=\"20\" fill=\"url(#smooth)\"/>"
+ "</g>"
+ "<g fill=\"#fff\" text-anchor=\"middle\" font-family=\"DejaVu Sans,Verdana,Geneva,sans-serif\" font-size=\"11\">"
+ "<text x=\"%d\" y=\"15\" fill=\"#010101\" fill-opacity=\".3\">%s</text>"
+ "<text x=\"%d\" y=\"14\">%s</text>"
+ "<text x=\"%d\" y=\"15\" fill=\"#010101\" fill-opacity=\".3\">%s</text>"
+ "<text x=\"%d\" y=\"14\">%s</text>"
+ "</g>"
+ "</svg>",
+ total_width, total_width,
+ label_width, label_color_escaped,
+ label_width, value_width, value_color_escaped,
+ total_width,
+ label_width / 2, label_escaped,
+ label_width / 2, label_escaped,
+ label_width + value_width / 2 -1, value_escaped,
+ label_width + value_width / 2 -1, value_escaped);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 00:55:20 +0000