Reset fb and bg to default at the end of the output (#96)

Fix #95

Author: arl

testdata/default.output.txt

@@ -51,4 +51,4 @@ with some different content
 
 -- empty_file --
 -- output.golden --
-#[fg=default]#[fg=default]#[fg=white,bold]⎇ #[fg=default]#[fg=white,bold]main#[fg=default] - #[fg=default]#[fg=green,bold]● 1 #[fg=red,bold]✚ 1 #[fg=cyan,bold]⚑ 1 #[fg=magenta,bold]… 2
+#[fg=default]#[fg=default]#[fg=white,bold]⎇ #[fg=default]#[fg=white,bold]main#[fg=default] - #[fg=default]#[fg=green,bold]● 1 #[fg=red,bold]✚ 1 #[fg=cyan,bold]⚑ 1 #[fg=magenta,bold]… 2#[fg=default,bg=default]

tmux/formater.go

@@ -148,6 +148,8 @@ func (f *Formater) Format(w io.Writer, st *gitstatus.Status) error {
 	return err
 }
 
+const resetStyles = "#[fg=default,bg=default]"
+
 func (f *Formater) format() string {
 	var comps []string
 
@@ -188,6 +190,10 @@ func (f *Formater) format() string {
 	}
 
 	sb.WriteString(joinComps())
+
+	// Reset foreground and background styles to default, since there could be
+	// successive elements in user tmux status strings.
+	sb.WriteString(resetStyles)
 	return sb.String()
 }
 

tmux/formater_test.go

@@ -396,7 +396,8 @@ func TestFormat(t *testing.T) {
 				"StyleClear" + " .. " +
 				"StyleClear" + "StyleRemoteRemote" +
 				"StyleClear" + " - " +
-				"StyleClear" + "StyleModSymbolMod2",
+				"StyleClear" + "StyleModSymbolMod2" +
+				resetStyles,
 		},
 		{
 			name: "branch, different delimiter, flags",
@@ -423,7 +424,8 @@ func TestFormat(t *testing.T) {
 			want: "StyleClear" + "StyleBranchSymbolBranch" +
 				"StyleClear" + "StyleBranch" + "Local" +
 				"StyleClear" + "~~" +
-				"StyleClear" + "StyleModSymbolMod2",
+				"StyleClear" + "StyleModSymbolMod2" +
+				resetStyles,
 		},
 		{
 			name: "remote only",
@@ -445,7 +447,8 @@ func TestFormat(t *testing.T) {
 				},
 			},
 			want: "StyleClear" + "StyleRemoteRemote " +
-				"StyleClear" + "SymbolAhead1",
+				"StyleClear" + "SymbolAhead1" +
+				resetStyles,
 		},
 		{
 			name: "empty",
@@ -465,7 +468,7 @@ func TestFormat(t *testing.T) {
 					NumModified: 2,
 				},
 			},
-			want: "",
+			want: resetStyles,
 		},
 		{
 			name: "branch and remote, branch_max_len not zero",
@@ -492,7 +495,8 @@ func TestFormat(t *testing.T) {
 			want: "StyleClear" + "StyleBranch" + "SymbolBranch" +
 				"StyleClear" + "StyleBranch" + "branchNa…" +
 				"StyleClear" + "/" +
-				"StyleClear" + "StyleRemote" + "remote/b…",
+				"StyleClear" + "StyleRemote" + "remote/b…" +
+				resetStyles,
 		},
 		{
 			name: "branch and remote, branch_max_len not zero and trim left",
@@ -518,7 +522,8 @@ func TestFormat(t *testing.T) {
 			},
 			want: "StyleClear" + "StyleBranch" + "SymbolBranch" +
 				"StyleClear" + "StyleBranch" + "...Branch " +
-				"StyleClear" + "StyleRemote" + "...Branch",
+				"StyleClear" + "StyleRemote" + "...Branch" +
+				resetStyles,
 		},
 		{
 			name: "issue-32",
@@ -536,7 +541,8 @@ func TestFormat(t *testing.T) {
 				},
 			},
 			want: "StyleClear" + "StyleBranch" + "SymbolBranch" +
-				"StyleClear" + "StyleBranch" + "branchName",
+				"StyleClear" + "StyleBranch" + "branchName" +
+				resetStyles,
 		},
 		{
 			name: "hide clean option true",
@@ -554,7 +560,7 @@ func TestFormat(t *testing.T) {
 			options: options{
 				HideClean: true,
 			},
-			want: "",
+			want: resetStyles,
 		},
 		{
 			name: "hide clean option false",
@@ -572,7 +578,7 @@ func TestFormat(t *testing.T) {
 			options: options{
 				HideClean: false,
 			},
-			want: "StyleClear" + "StyleCleanSymbolClean",
+			want: "StyleClear" + "StyleCleanSymbolClean" + resetStyles,
 		},
 	}
 	for _, tt := range tests {