add rrow background color setting by first assigned label

1 files changed, 119 insertions, 0 deletions

diff --git a/include/colors.php b/include/colors.php
new file mode 100644
index 000000000..dcd79a941
--- /dev/null
+++ b/include/colors.php
@@ -0,0 +1,119 @@
+<?php
+### RGB >> HSL
+function _color_rgb2hsl($rgb) {
+  $r = $rgb[0]; $g = $rgb[1]; $b = $rgb[2];
+  $min = min($r, min($g, $b)); $max = max($r, max($g, $b));
+  $delta = $max - $min; $l = ($min + $max) / 2; $s = 0;
+  if ($l > 0 && $l < 1) {
+    $s = $delta / ($l < 0.5 ? (2 * $l) : (2 - 2 * $l));
+  }
+  $h = 0;
+  if ($delta > 0) {
+    if ($max == $r && $max != $g) $h += ($g - $b) / $delta;
+    if ($max == $g && $max != $b) $h += (2 + ($b - $r) / $delta);
+    if ($max == $b && $max != $r) $h += (4 + ($r - $g) / $delta);
+    $h /= 6;
+  } return array($h, $s, $l);
+}
+
+### HSL >> RGB
+function _color_hsl2rgb($hsl) {
+  $h = $hsl[0]; $s = $hsl[1]; $l = $hsl[2];
+  $m2 = ($l <= 0.5) ? $l * ($s + 1) : $l + $s - $l*$s;
+  $m1 = $l * 2 - $m2;
+  return array(_color_hue2rgb($m1, $m2, $h + 0.33333),
+               _color_hue2rgb($m1, $m2, $h),
+               _color_hue2rgb($m1, $m2, $h - 0.33333));
+}
+
+### Helper function for _color_hsl2rgb().
+function _color_hue2rgb($m1, $m2, $h) {
+  $h = ($h < 0) ? $h + 1 : (($h > 1) ? $h - 1 : $h);
+  if ($h * 6 < 1) return $m1 + ($m2 - $m1) * $h * 6;
+  if ($h * 2 < 1) return $m2;
+  if ($h * 3 < 2) return $m1 + ($m2 - $m1) * (0.66666 - $h) * 6;
+  return $m1;
+}
+
+### Convert a hex color into an RGB triplet.
+function _color_unpack($hex, $normalize = false) {
+  if (strlen($hex) == 4) {
+    $hex = $hex[1] . $hex[1] . $hex[2] . $hex[2] . $hex[3] . $hex[3];
+  } $c = hexdec($hex);
+  for ($i = 16; $i >= 0; $i -= 8) {
+    $out[] = (($c >> $i) & 0xFF) / ($normalize ? 255 : 1);
+  } return $out;
+}
+
+### Convert an RGB triplet to a hex color.
+function _color_pack($rgb, $normalize = false) {
+  foreach ($rgb as $k => $v) {
+    $out |= (($v * ($normalize ? 255 : 1)) << (16 - $k * 8));
+  }return '#'. str_pad(dechex($out), 6, 0, STR_PAD_LEFT);
+}
+
+function rgb2hsl($arr) {
+	$r = $arr[0];
+	$g = $arr[1];
+	$b = $arr[2];
+
+   $var_R = ($r / 255);
+   $var_G = ($g / 255);
+   $var_B = ($b / 255);
+
+   $var_Min = min($var_R, $var_G, $var_B);
+   $var_Max = max($var_R, $var_G, $var_B);
+   $del_Max = $var_Max - $var_Min;
+
+   $v = $var_Max;
+
+   if ($del_Max == 0) {
+      $h = 0;
+      $s = 0;
+   } else {
+      $s = $del_Max / $var_Max;
+
+      $del_R = ( ( ( $max - $var_R ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
+      $del_G = ( ( ( $max - $var_G ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
+      $del_B = ( ( ( $max - $var_B ) / 6 ) + ( $del_Max / 2 ) ) / $del_Max;
+
+      if      ($var_R == $var_Max) $h = $del_B - $del_G;
+      else if ($var_G == $var_Max) $h = ( 1 / 3 ) + $del_R - $del_B;
+      else if ($var_B == $var_Max) $h = ( 2 / 3 ) + $del_G - $del_R;
+
+      if ($H < 0) $h++;
+      if ($H > 1) $h--;
+   }
+
+   return array($h, $s, $v);
+}
+
+function hsl2rgb($arr) {
+	$h = $arr[0];
+	$s = $arr[1];
+	$v = $arr[2];
+
+    if($s == 0) {
+        $r = $g = $B = $v * 255;
+    } else {
+        $var_H = $h * 6;
+        $var_i = floor( $var_H );
+        $var_1 = $v * ( 1 - $s );
+        $var_2 = $v * ( 1 - $s * ( $var_H - $var_i ) );
+        $var_3 = $v * ( 1 - $s * (1 - ( $var_H - $var_i ) ) );
+
+        if       ($var_i == 0) { $var_R = $v     ; $var_G = $var_3  ; $var_B = $var_1 ; }
+        else if  ($var_i == 1) { $var_R = $var_2 ; $var_G = $v      ; $var_B = $var_1 ; }
+        else if  ($var_i == 2) { $var_R = $var_1 ; $var_G = $v      ; $var_B = $var_3 ; }
+        else if  ($var_i == 3) { $var_R = $var_1 ; $var_G = $var_2  ; $var_B = $v     ; }
+        else if  ($var_i == 4) { $var_R = $var_3 ; $var_G = $var_1  ; $var_B = $v     ; }
+        else                   { $var_R = $v     ; $var_G = $var_1  ; $var_B = $var_2 ; }
+
+        $r = $var_R * 255;
+        $g = $var_G * 255;
+        $B = $var_B * 255;
+    }
+    return array($r, $g, $B);
+}
+
+?>