[fmtc] Added method 'IsColorsSupported'

CHANGELOG.md

@@ -3,6 +3,7 @@
 ### 12.88.0
 
 * `[pager]` Added new package for pager (`less`/`more`) setup
+* `[fmtc]` Added method `IsColorsSupported`
 
 ### 12.87.0
 

fmtc/examples_test.go

@@ -337,6 +337,10 @@ func ExampleClean() {
 	// Output: Text
 }
 
+func ExampleIsColorsSupported() {
+	fmt.Printf("16 Colors Supported: %t\n", IsColorsSupported())
+}
+
 func ExampleIs256ColorsSupported() {
 	fmt.Printf("256 Colors Supported: %t\n", Is256ColorsSupported())
 }

fmtc/fmtc.go

@@ -75,8 +75,9 @@ var DisableColors = os.Getenv("NO_COLOR") != ""
 
 // ////////////////////////////////////////////////////////////////////////////////// //
 
-var colors256Supported bool
-var colorsTCSupported bool
+var colorsSupported bool    // 16 colors support
+var colors256Supported bool // 256 colors support
+var colorsTCSupported bool  // 24bit (TrueColor) colors support
 var colorsSupportChecked bool
 
 var colorsMap *sync.Map
@@ -328,6 +329,17 @@ func Bell() {
 	fmt.Print(_CODE_BELL)
 }
 
+// IsColorsSupported returns true if 16 colors is supported by terminal
+func IsColorsSupported() bool {
+	if colorsSupportChecked {
+		return colorsSupported
+	}
+
+	checkForColorsSupport()
+
+	return colorsSupported
+}
+
 // Is256ColorsSupported returns true if 256 colors is supported by terminal
 func Is256ColorsSupported() bool {
 	if colorsSupportChecked {
@@ -644,6 +656,13 @@ func isValidNamedTag(tag string) bool {
 }
 
 func checkForColorsSupport() {
+	switch {
+	case strings.Contains(term, "xterm"),
+		strings.Contains(term, "color"),
+		term == "screen":
+		colorsSupported = true
+	}
+
 	if strings.Contains(term, "256color") {
 		colors256Supported = true
 	}

fmtc/fmtc_test.go

@@ -146,6 +146,7 @@ func (s *FormatSuite) Test24BitColors(c *C) {
 
 	c.Assert(IsTrueColorSupported(), Equals, true)
 	c.Assert(Is256ColorsSupported(), Equals, true)
+	c.Assert(IsColorsSupported(), Equals, true)
 
 	colorsSupportChecked = false
 	colors256Supported = false