Add gradients and borders to FormSpec boxes (#8676)

src/gui/StyleSpec.h

@@ -24,6 +24,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "util/string.h"
 #include <algorithm>
 #include <array>
+#include <vector>
 
 #pragma once
 
@@ -50,6 +51,9 @@ public:
 		PADDING,
 		FONT,
 		FONT_SIZE,
+		COLORS,
+		BORDERCOLORS,
+		BORDERWIDTHS,
 		NUM_PROPERTIES,
 		NONE
 	};
@@ -106,6 +110,12 @@ public:
 			return FONT;
 		} else if (name == "font_size") {
 			return FONT_SIZE;
+		} else if (name == "colors") {
+			return COLORS;
+		} else if (name == "bordercolors") {
+			return BORDERCOLORS;
+		} else if (name == "borderwidths") {
+			return BORDERWIDTHS;
 		} else {
 			return NONE;
 		}
@@ -187,6 +197,42 @@ public:
 		return color;
 	}
 
+	std::array<video::SColor, 4> getColorArray(Property prop,
+		std::array<video::SColor, 4> def) const
+	{
+		const auto &val = properties[prop];
+		if (val.empty())
+			return def;
+
+		std::vector<std::string> strs;
+		if (!parseArray(val, strs))
+			return def;
+
+		for (size_t i = 0; i <= 3; i++) {
+			video::SColor color;
+			if (parseColorString(strs[i], color, false, 0xff))
+				def[i] = color;
+		}
+
+		return def;
+	}
+
+	std::array<s32, 4> getIntArray(Property prop, std::array<s32, 4> def) const
+	{
+		const auto &val = properties[prop];
+		if (val.empty())
+			return def;
+
+		std::vector<std::string> strs;
+		if (!parseArray(val, strs))
+			return def;
+
+		for (size_t i = 0; i <= 3; i++)
+			def[i] = stoi(strs[i]);
+
+		return def;
+	}
+
 	irr::core::rect<s32> getRect(Property prop, irr::core::rect<s32> def) const
 	{
 		const auto &val = properties[prop];
@@ -334,6 +380,24 @@ public:
 	}
 
 private:
+	bool parseArray(const std::string &value, std::vector<std::string> &arr) const
+	{
+		std::vector<std::string> strs = split(value, ',');
+
+		if (strs.size() == 1) {
+			arr = {strs[0], strs[0], strs[0], strs[0]};
+		} else if (strs.size() == 2) {
+			arr = {strs[0], strs[1], strs[0], strs[1]};
+		} else if (strs.size() == 4) {
+			arr = strs;
+		} else {
+			warningstream << "Invalid array size (" << strs.size()
+					<< " arguments): \"" << value << "\"" << std::endl;
+			return false;
+		}
+		return true;
+	}
+
 	bool parseRect(const std::string &value, irr::core::rect<s32> *parsed_rect) const
 	{
 		irr::core::rect<s32> rect;