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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "log" | ||
| "math" | ||
|
|
||
| "github.com/alecthomas/chroma" | ||
| "github.com/alecthomas/chroma/lexers" | ||
| "github.com/alecthomas/chroma/styles" | ||
| ) | ||
|
|
||
| var c = chroma.MustParseColour | ||
|
|
||
| // ColorMap associates termui color names with a respective chroma color | ||
| var ColorMap = map[string]chroma.Colour{ | ||
| "red": c("#ff0000"), | ||
| "blue": c("#0000ff"), | ||
| "black": c("#000000"), | ||
| "cyan": c("#00ffff"), | ||
| "yellow": c("#ffff00"), | ||
| "white": c("#ffffff"), | ||
| "green": c("#00ff00"), | ||
| "magenta": c("#ff00ff"), | ||
| } | ||
|
|
||
| // Highlighter helps facilitate makefile syntax highlighting | ||
| type Highlighter struct { | ||
| style *chroma.Style | ||
| } | ||
|
|
||
| // NewHighlighter constructs a Highlighter and sets the style based on the given styleName | ||
| func NewHighlighter(styleName string) *Highlighter { | ||
| style := styles.Get(styleName) | ||
| if style == nil { | ||
| style = styles.Fallback | ||
| } | ||
| return &Highlighter{style} | ||
| } | ||
|
|
||
| // GetHighlightedContent iterates through the given content slice and returns it with inline style annotations | ||
| func (highlighter *Highlighter) GetHighlightedContent(content []string) []string { | ||
| lexer := lexers.Get("Base Makefile") | ||
|
|
||
| var highlightedContent []string | ||
| currentLine := "" | ||
| for _, line := range content { | ||
| iterator, err := lexer.Tokenise(nil, line) | ||
| if err != nil { | ||
| log.Fatal(err) | ||
| } | ||
| for token := iterator(); token != chroma.EOF; token = iterator() { | ||
| if token.Value == "\n" { | ||
| highlightedContent = append(highlightedContent, currentLine) | ||
| currentLine = "" | ||
| continue | ||
| } | ||
| entry := highlighter.style.Get(token.Type) | ||
| fg := "clear" | ||
| if entry.Colour.IsSet() { | ||
| fg = approximateColor(entry.Colour) | ||
| } | ||
| style := "fg:" + fg | ||
| if entry.Bold == chroma.Yes { | ||
| style += ",mod:bold" | ||
| } else if entry.Underline == chroma.Yes { | ||
| style += ",mod:underline" | ||
| } | ||
| currentLine += "[" + token.Value + "](" + style + ")" | ||
| } | ||
| if currentLine != "" { | ||
| highlightedContent = append(highlightedContent, currentLine) | ||
| currentLine = "" | ||
| } | ||
| } | ||
| return highlightedContent | ||
| } | ||
|
|
||
| func approximateColor(color chroma.Colour) string { | ||
| lowestDistance := math.MaxFloat64 | ||
| var bestColor string | ||
| for colorName, c := range ColorMap { | ||
| distance := color.Distance(c) | ||
| if distance < lowestDistance { | ||
| lowestDistance = distance | ||
| bestColor = colorName | ||
| } | ||
| } | ||
| return bestColor | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "testing" | ||
| ) | ||
|
|
||
| func TestGetHighlightedContent(t *testing.T) { | ||
| content := []string{ | ||
| "PROJECT = make-tui", | ||
| "BUILD_DIR ?= build", | ||
| "APP_SOURCES = parser.go \\", | ||
| " render.go \\", | ||
| " search.go \\", | ||
| " target.go \\", | ||
| " main.go \\", | ||
| "", | ||
| "build: $(APP_SOURCES)", | ||
| " go build -o $(BUILD_DIR)/make-tui $(APP_SOURCES)", | ||
| ".PHONY: build", | ||
| "", | ||
| "run: $(APP_SOURCES)", | ||
| " go run $(APP_SOURCES)", | ||
| ".PHONY: run", | ||
| "", | ||
| "test:", | ||
| " go test ./...", | ||
| ".PHONY: test", | ||
| "", | ||
| "clean:", | ||
| " rm -rf $(BUILD_DIR)", | ||
| ".PHONY: clean", | ||
| } | ||
| expected := len(content) | ||
| highlighter := NewHighlighter("emacs") | ||
| highlightedContent := highlighter.GetHighlightedContent(content) | ||
|
|
||
| result := len(highlightedContent) | ||
|
|
||
| if result != expected { | ||
| t.Errorf("expected highlighted content %d, received %d", expected, result) | ||
| } | ||
|
|
||
| } |
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