add parsers

README.md

@@ -22,7 +22,7 @@ $ go get -u github.com/probandula/figlet4go/...
 You can use the `figlet4go` command in the command-line.  
 For example (generates the banner on top):
 ```bash
-$ figlet4go -str "figlet4go" -font "larry3d" -colors "green;yellow;cyan"
+$ figlet4go -str "figlet4go" -font "larry3d" -colors "green;FF9900;cyan"
 ```
 For a usage instruction read the commands usage with `figlet4go -h`.
 
@@ -43,6 +43,7 @@ fmt.Print(renderStr)
 ### Colored
 The colors given in the `[]figlet4go.Color` slice are repeating if the string is longer than the slice. You have to call the `RenderOpts` instead of the `Render` method to give the Renderer the Options.  
 If you use a `TrueColor` color, you have to ensure that your [terminal supports](https://gist.github.com/XVilka/8346728/) it.  
+If you use a `AnsiColor` with an `TrueColor` only parser (f.e. `ParserHTML`), `TrueColor` objects are automatically generated.
 ```go
 import "github.com/probandula/figlet4go"
 
@@ -58,7 +59,7 @@ options.FontColor = []figlet4go.Color{
 	figlet4go.ColorYellow,
 	figlet4go.ColorCyan,
 	// ...or by an hex string...
-	figlet4go.GetTrueColorFromHexString("885DBA"),
+	figlet4go.NewTrueColorFromHexString("885DBA"),
 	// ...or by an TrueColor object with rgb values
 	figlet4go.TrueColor{136, 93, 186},
 }
@@ -87,6 +88,14 @@ renderStr, _ := ascii.RenderOpts("Hello Fonts", options)
 fmt.Print(renderStr)
 ```
 
+## Parsers
+There a currently these Parsers available:
+
+| Parser | What does it do?                                                     |
+| --------- | ------                                                     |
+| ParserTerminal  | Parses the result directly |
+| ParserHTML   | Parses a pasteable `<code>` html block  |
+
 ## Fonts
 
 ### Builtin

char.go

@@ -2,6 +2,7 @@ package figlet4go
 
 import (
 	"errors"
+	"strings"
 )
 
 // Represents a single ascii character
@@ -26,14 +27,28 @@ func newAsciiChar(font *font, char rune) (*asciiChar, error) {
 }
 
 // Return a line of the char as string with color if set
-func (char *asciiChar) GetLine(index int) string {
+func (char *asciiChar) GetLine(index int, p Parser) string {
 	prefix := ""
 	suffix := ""
 
+	line := handleReplaces(char.Lines[index], p)
+
 	if char.Color != nil {
-		prefix = char.Color.getPrefix()
-		suffix = char.Color.getSuffix()
+		prefix = char.Color.getPrefix(p)
+		suffix = char.Color.getSuffix(p)
 	}
 
-	return prefix + char.Lines[index] + suffix
+	return prefix + line + suffix
+}
+
+// Replace all parser specific things
+func handleReplaces(str string, p Parser) string {
+	if p.Replaces == nil {
+		return str
+	}
+	// Replace for each entry
+	for old, new := range p.Replaces {
+		str = strings.Replace(str, old, new, -1)
+	}
+	return str
 }

cmd/figlet4go/figlet4go.go

@@ -14,6 +14,7 @@ var (
 	font     *string = flag.String("font", "", "Font name to use")
 	fontpath *string = flag.String("fontpath", "", "Font path to load fonts from")
 	colors   *string = flag.String("colors", "", "Character colors separated by ';'\n\tPossible colors: black, red, green, yellow, blue, magenta, cyan, white, or any hexcode (f.e. '885DBA')")
+	parser   *string = flag.String("parser", "terminal", "Parser to use\tPossible parsers: terminal (default), html")
 )
 
 func main() {
@@ -35,6 +36,9 @@ func main() {
 	// Set the font
 	options.FontName = *font
 
+	// Set the parser
+	options.Parser = getParser(*parser)
+
 	// Set colors
 	if *colors != "" {
 		options.FontColor = getColorSlice(*colors)
@@ -49,6 +53,17 @@ func main() {
 	fmt.Print(renderStr)
 }
 
+// Get the parser for given flag argument
+func getParser(parserStr string) figlet4go.Parser {
+	switch parserStr {
+	case "html":
+		return figlet4go.ParserHTML
+	// Terminal parser is default
+	default:
+		return figlet4go.ParserTerminal
+	}
+}
+
 // Get a slice with colors to give to the RenderOptions
 // Splits the given string with the separator ";"
 func getColorSlice(colorStr string) []figlet4go.Color {
@@ -77,7 +92,7 @@ func getColorSlice(colorStr string) []figlet4go.Color {
 			colors[i] = figlet4go.ColorWhite
 		default:
 			// Try to parse the TrueColor from the string
-			color, err := figlet4go.GetTrueColorFromHexString(c)
+			color, err := figlet4go.NewTrueColorFromHexString(c)
 			if err != nil {
 				log.Fatal(err)
 			}

color.go

@@ -1,14 +1,15 @@
 package figlet4go
 
 import (
-	"fmt"
-	"errors"
 	"encoding/hex"
+	"errors"
+	"fmt"
 )
 
 // Escape char
 const escape string = "\x1b"
 
+// Terminal AnsiColors
 var (
 	ColorBlack   AnsiColor = AnsiColor{30}
 	ColorRed     AnsiColor = AnsiColor{31}
@@ -20,18 +21,32 @@ var (
 	ColorWhite   AnsiColor = AnsiColor{37}
 )
 
-// Every color has a pre- and a suffix
-type Color interface {
-	getPrefix() string
-	getSuffix() string
+// TrueColor lookalikes for displaying AnsiColor f.e. with the HTML parser
+// Colors based on http://clrs.cc/
+// "TrueColorForAnsiColor"
+var tcfac map[AnsiColor]TrueColor = map[AnsiColor]TrueColor{
+	ColorBlack:   TrueColor{0, 0, 0},
+	ColorRed:     TrueColor{255, 65, 54},
+	ColorGreen:   TrueColor{149, 189, 64},
+	ColorYellow:  TrueColor{255, 220, 0},
+	ColorBlue:    TrueColor{0, 116, 217},
+	ColorMagenta: TrueColor{177, 13, 201},
+	ColorCyan:    TrueColor{105, 206, 245},
+	ColorWhite:   TrueColor{255, 255, 255},
 }
 
-// Ansi color
+// Every color has a pre- and a suffix
+type Color interface {
+	getPrefix(p Parser) string
+	getSuffix(p Parser) string
+}
+
+// AnsiColor representation
 type AnsiColor struct {
 	code int
 }
 
-// Truecolor with rgb Attributes
+// TrueColor with rgb Attributes
 type TrueColor struct {
 	r int
 	g int
@@ -39,16 +54,35 @@ type TrueColor struct {
 }
 
 // Prefix for ansi color
-func (tc TrueColor) getPrefix() string {
+func (tc TrueColor) getPrefix(p Parser) string {
+	switch p.Name {
+
+	case "terminal":
 		return fmt.Sprintf("%v[38;2;%d;%d;%dm", escape, tc.r, tc.g, tc.b)
+
+	case "html":
+		return fmt.Sprintf("<span style='color: rgb(%d,%d,%d);'>", tc.r, tc.g, tc.b)
+	}
+
+	return ""
 }
 
 // Suffix for ansi color
-func (tc TrueColor) getSuffix() string {
+func (tc TrueColor) getSuffix(p Parser) string {
+	switch p.Name {
+
+	case "terminal":
 		return fmt.Sprintf("%v[0m", escape)
+
+	case "html":
+		return "</span>"
 	}
 
-func GetTrueColorFromHexString(c string) (*TrueColor, error) {
+	return ""
+}
+
+// NewTrueColorFromHexString returns a Truecolor object based on a hexadezimal string
+func NewTrueColorFromHexString(c string) (*TrueColor, error) {
 	rgb, err := hex.DecodeString(c)
 	if err != nil {
 		return nil, errors.New("Invalid color given (" + c + ")")
@@ -61,13 +95,35 @@ func GetTrueColorFromHexString(c string) (*TrueColor, error) {
 	}, nil
 }
 
-
 // Prefix for ansi color
-func (ac AnsiColor) getPrefix() string {
+func (ac AnsiColor) getPrefix(p Parser) string {
+	switch p.Name {
+
+	case "terminal":
 		return fmt.Sprintf("%v[0;%dm", escape, ac.code)
+
+	case "html":
+		// Get the TrueColor for the AnsiColor
+		tc := tcfac[ac]
+		return tc.getPrefix(p)
+	}
+
+	return ""
+	
 }
 
 // Suffix for ansi color
-func (ac AnsiColor) getSuffix() string {
+func (ac AnsiColor) getSuffix(p Parser) string {
+	switch p.Name {
+
+	case "terminal":
 		return fmt.Sprintf("%v[0m", escape)
+
+	case "html":
+		// Get the TrueColor for the AnsiColor
+		tc := tcfac[ac]
+		return tc.getSuffix(p)
+	}
+
+	return ""
 }

parser.go

@@ -0,0 +1,22 @@
+package figlet4go
+
+// Parser stores some output specific stuff
+type Parser struct {
+	// Name used for switching in colors.go
+	Name     string
+	// Parser prefix
+	Prefix   string
+	// Parser suffix
+	Suffix   string
+	// Newline representation
+	NewLine  string
+	// Things to be replaced (f.e. \n to <br>)
+	Replaces map[string]string
+}
+
+var (
+	// Default terminal parser
+	ParserTerminal Parser = Parser{"terminal", "", "", "\n", nil}
+	// Parser for HTML code
+	ParserHTML Parser = Parser{"html", "<code>", "</code>", "<br>", map[string]string{" ": "&nbsp;"}}
+)

render.go

@@ -7,6 +7,8 @@ type RenderOptions struct {
 	FontName string
 	// Colors of the font
 	FontColor []Color
+	// Parser
+	Parser Parser
 }
 
 // NewRenderOptions creates new RenderOptions
@@ -14,6 +16,7 @@ type RenderOptions struct {
 func NewRenderOptions() *RenderOptions {
 	return &RenderOptions{
 		FontName: defaultFont,
+		Parser:   ParserTerminal,
 	}
 }
 
@@ -83,15 +86,19 @@ func (ar *AsciiRender) RenderOpts(str string, opt *RenderOptions) (string, error
 	// Result which will be returned
 	result := ""
 
+	result += opt.Parser.Prefix
+
 	// Foreach line of the font height
 	for curLine := 0; curLine < font.height; curLine++ {
 		// Add the current line of the char to the result
 		for i := range chars {
-			result += chars[i].GetLine(curLine)
+			result += chars[i].GetLine(curLine, opt.Parser)
 		}
 		// A new line at the end
-		result += "\n"
+		result += opt.Parser.NewLine
 	}
 
+	result += opt.Parser.Suffix
+
 	return result, nil
 }