Add cursorline option

cmd/micro/settings.go

@@ -74,6 +74,7 @@ func DefaultSettings() map[string]interface{} {
 	return map[string]interface{}{
 		"autoindent":   true,
 		"colorscheme":  "default",
+		"cursorline":   false,
 		"ignorecase":   false,
 		"indentchar":   " ",
 		"ruler":        true,

cmd/micro/view.go

@@ -559,6 +559,13 @@ func (v *View) DisplayView() {
 				lineStyle = highlightStyle
 			}
 
+			if settings["cursorline"].(bool) && v.Cursor.Y == lineN+v.Topline {
+				if style, ok := colorscheme["cursor-line"]; ok {
+					fg, _, _ := style.Decompose()
+					lineStyle = lineStyle.Background(fg)
+				}
+			}
+
 			if ch == '\t' {
 				lineIndentStyle := defStyle
 				if style, ok := colorscheme["indent-char"]; ok {
@@ -574,6 +581,12 @@ func (v *View) DisplayView() {
 						lineIndentStyle = style
 					}
 				}
+				if settings["cursorline"].(bool) && v.Cursor.Y == lineN+v.Topline {
+					if style, ok := colorscheme["cursor-line"]; ok {
+						fg, _, _ := style.Decompose()
+						lineIndentStyle = lineIndentStyle.Background(fg)
+					}
+				}
 				indentChar := []rune(settings["indentchar"].(string))
 				screen.SetContent(x-v.leftCol, lineN, indentChar[0], nil, lineIndentStyle)
 				tabSize := int(settings["tabsize"].(float64))
@@ -610,7 +623,14 @@ func (v *View) DisplayView() {
 		charNum++
 
 		for i := 0; i < v.width-x; i++ {
-			screen.SetContent(x+i, lineN, ' ', nil, defStyle)
+			lineStyle := tcell.StyleDefault
+			if settings["cursorline"].(bool) && v.Cursor.Y == lineN+v.Topline {
+				if style, ok := colorscheme["cursor-line"]; ok {
+					fg, _, _ := style.Decompose()
+					lineStyle = lineStyle.Background(fg)
+				}
+			}
+			screen.SetContent(x+i, lineN, ' ', nil, lineStyle)
 		}
 	}
 }

runtime/colorschemes/default.micro

@@ -12,3 +12,4 @@ color-link indent-char "black"
 color-link line-number "yellow"
 color-link gutter-error ",red"
 color-link gutter-warning "red"
+color-link cursor-line "white"

runtime/colorschemes/solarized-tc.micro

@@ -14,3 +14,4 @@ color-link indent-char "#586E75,#002833"
 color-link line-number "#586E75,#003541"
 color-link gutter-error "#003541,#CB4B16"
 color-link gutter-warning "#CB4B16,#002833"
+color-link cursor-line "#003541"

runtime/colorschemes/solarized.micro

@@ -13,3 +13,4 @@ color-link indent-char "black"
 color-link line-number "brightgreen,black"
 color-link gutter-error "black,brightred"
 color-link gutter-warning "brightred,default"
+color-link cursor-line "black"

runtime/help/help.md

@@ -184,6 +184,11 @@ Here are the options that you can set:
 
 	default value: `on`
 
+* `cursorline`: highlight the line that the cursor is on in a different color
+   (the color is defined by the colorscheme you are using)
+
+    default value: `off`
+
 * `ruler`: display line numbers
 
 	default value: `on`