started color customization

1 files changed, 65 insertions, 0 deletions

diff --git a/colors.c b/colors.c
new file mode 100644
index 0000000..d3952c3
--- /dev/null
+++ b/colors.c
@@ -0,0 +1,65 @@
+ENUM_U16 {
+	COLOR_UNKNOWN,
+
+	COLOR_BG,
+	COLOR_CURSOR,
+	COLOR_CURSOR_LINE_BG,
+	COLOR_BORDER,
+	COLOR_TEXT,
+	COLOR_SELECTION_BG,
+	COLOR_SELECTION_TEXT,
+
+	COLOR_COUNT
+} ENUM_U16_END(ColorSetting);
+
+typedef struct {
+	ColorSetting setting;
+	char const *name;
+} ColorName;
+
+static ColorName const color_names[COLOR_COUNT] = {
+	{COLOR_UNKNOWN, "unknown"},
+	{COLOR_BG, "bg"},
+	{COLOR_CURSOR, "cursor"},
+	{COLOR_CURSOR_LINE_BG, "cursor-line-bg"},
+	{COLOR_BORDER, "border"},
+	{COLOR_TEXT, "text"},
+	{COLOR_SELECTION_BG, "selection-bg"},
+	{COLOR_SELECTION_TEXT, "selection-text"}
+};
+
+static ColorSetting color_setting_from_str(char const *str) {
+	// @OPTIM: sort color_names, binary search
+	for (int i = 0; i < COLOR_COUNT; ++i) {
+		ColorName const *n = &color_names[i];
+		if (streq(n->name, str))
+			return n->setting;
+	}
+	return COLOR_UNKNOWN;
+}
+
+static char const *color_setting_to_str(ColorSetting s) {
+	for (int i = 0; i < COLOR_COUNT; ++i) {
+		ColorName const *n = &color_names[i];
+		if (n->setting == s)
+			return n->name;
+	}
+	return "???";
+}
+
+// converts #rrggbb/#rrggbbaa to a color. returns false if it's not in the right format.
+static Status color_from_str(char const *str, u32 *color) {
+	uint r = 0, g = 0, b = 0, a = 0xff;
+	size_t len = strlen(str);
+	if (len == 7) {
+		sscanf(str, "#%02x%02x%02x", &r, &g, &b);
+	} else if (len == 9) {
+		sscanf(str, "#%02x%02x%02x%02x", &r, &g, &b, &a);
+	} else {
+		return false;
+	}
+	if (r > 0xff || g > 0xff || b > 0xff) return false;
+	if (color)
+		*color = (u32)r << 24 | (u32)g << 16 | (u32)b << 8 | (u32)a;
+	return true;
+}