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rewrote decodeHexColor func, add more formats

This commit is contained in:
bagomot 2023-04-21 13:00:54 +03:00
parent 51d1eabb8d
commit ab32887748
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1 changed files with 78 additions and 36 deletions
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114
src/dlangui/graphics/colors.d
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@ -312,44 +312,86 @@ bool isFullyTransparentColor(uint color) pure nothrow {
return (color >> 24) == 0xFF; return (color >> 24) == 0xFF;
} }
/// decode color string supported formats: #RGB #ARGB #RRGGBB #AARRGGBB /// decode color string supported formats: #RGB, #ARGB, #RRGGBB, #AARRGGBB, rgb(r,g,b), rgba(r,g,b,a), rgba(r,g,b,a%)
uint decodeHexColor(string s, uint defValue = 0) pure { //TODO: the name doesn't match function
s = strip(s); uint decodeHexColor(string s, uint defValue = 0) pure
switch (s) { {
case "@null": s = s.strip.toLower;
case "transparent": if (s.empty)
return COLOR_TRANSPARENT; return defValue;
case "black": if (s == "@null" || s == "transparent")
return 0x000000; return COLOR_TRANSPARENT;
case "white": if (s.startsWith("#") && (s.length == 4 || s.length == 5 || s.length == 7 || s.length == 9))
return 0xFFFFFF; { //#RGB #ARGB #RRGGBB #AARRGGBB
case "red": s = s[1 .. $];
return 0xFF0000; auto color = parse!uint(s, 16); //RGB(A) by default
case "green": if (s.length == 4)
return 0x00FF00; { //ARGB
case "blue": color = ((color & 0xF00) >> 4) | ((color & 0xF0) << 8) | ((color & 0xF) << 20);
return 0x0000FF; }
case "gray": else if (s.length == 8)
return 0x808080; { //AARRGGBB
case "lightgray": color = ((color & 0xFF00) >> 8) | ((color & 0xFF) << 24) | (
case "silver": (color & 0xFF0000) >> 8) | ((color & 0xFF000000) >> 24);
return 0xC0C0C0; }
default: return color;
break;
} }
if (s.length != 4 && s.length != 5 && s.length != 7 && s.length != 9) else if (s.startsWith("rgba(") && s.endsWith(")"))
return defValue; {
if (s[0] != '#') s = s[5 .. $ - 1];
return defValue; auto parts = s.split(",");
uint value = 0; if (parts.length != 4)
foreach(i; 1 .. s.length) {
uint digit = parseHexDigit(s[i]);
if (digit == uint.max)
return defValue; return defValue;
value = (value << 4) | digit; uint r = to!uint(parts[0].strip);
if (s.length < 7) // double the same digit for short forms uint g = to!uint(parts[1].strip);
value = (value << 4) | digit; uint b = to!uint(parts[2].strip);
if (r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255)
return defValue;
uint a = 1;
auto ap = parts[3].strip;
if (ap.endsWith("%")) //rgba(r,g,b,a%)
a = cast(uint) round(to!float(ap[0 .. $ - 1].strip) / 100.0 * 255.0);
else //rgba(r,g,b,a)
a = cast(uint) round(to!float(parts[3].strip) * 255.0);
if (a < 0)
a = 0;
else if (a > 255)
a = 255;
return (a << 24) | (r << 16) | (g << 8) | b;
} }
return value; else if (s.startsWith("rgb(") && s.endsWith(")"))
{
s = s[4 .. $ - 1];
auto parts = s.split(",");
if (parts.length != 3)
return defValue;
uint r = to!uint(parts[0].strip);
uint g = to!uint(parts[1].strip);
uint b = to!uint(parts[2].strip);
if (r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255)
return defValue;
return (r << 16) | (g << 8) | b;
}
foreach (color; __traits(allMembers, Color))
{
if (color == s)
return color.to!Color;
}
return defValue;
}
unittest
{
static assert(decodeHexColor("") == 0);
static assert(decodeHexColor("@null") == COLOR_TRANSPARENT);
static assert(decodeHexColor("trAnsParent") == COLOR_TRANSPARENT);
static assert(decodeHexColor("grAy") == 0x808080);
static assert(decodeHexColor("#8B008B") == 0x8B008B);
static assert(decodeHexColor("#fFf") == 0xfff);
static assert(decodeHexColor("#f0F0") == 0xf0f0);
static assert(decodeHexColor("#80ff0000") == 0x80ff0000);
static assert(decodeHexColor("rgba(255, 0, 0,.5 )") == 0x80ff0000);
static assert(decodeHexColor("rgba(255,0, 0, 50%)") == 0x80ff0000);
static assert(decodeHexColor("rgb(255,255, 255)") == 0xffffff);
} }