diff options
Diffstat (limited to 'io.go')
| -rw-r--r-- | io.go | 168 |
1 files changed, 93 insertions, 75 deletions
@@ -22,127 +22,145 @@ package main // Some functions for dealing with user input import ( - "bufio" - "strconv" - "strings" - "fmt" + "bufio" + "fmt" "github.com/pommicket/autoart/autoart" + "strconv" + "strings" ) - // Reads an int64 from a buffered reader, after giving the user the given prompt // If the number that the user entered does not satisfy valid, the user will // be prompted again. If the user enters nothing, the default will be used. func readInt64(reader *bufio.Reader, prompt string, - valid func (int64) bool, def int64) (int64, error) { - fmt.Print(prompt) - for { - line, err := reader.ReadString('\n') - if err != nil { - return 0, err - } - line = strings.TrimSpace(line) - if line == "" { - return def, nil - } - num, err := strconv.ParseInt(line, 0, 64) - if err != nil { - fmt.Println("Please enter a number.") - fmt.Print(prompt) - continue - } - if !valid(num) { - fmt.Println("Please enter a valid option.") - fmt.Print(prompt) - continue - } - return num, nil - } + valid func(int64) bool, def int64) (int64, error) { + fmt.Print(prompt) + for { + line, err := reader.ReadString('\n') + if err != nil { + return 0, err + } + line = strings.TrimSpace(line) + if line == "" { + return def, nil + } + num, err := strconv.ParseInt(line, 0, 64) + if err != nil { + fmt.Println("Please enter a number.") + fmt.Print(prompt) + continue + } + if !valid(num) { + fmt.Println("Please enter a valid option.") + fmt.Print(prompt) + continue + } + return num, nil + } } // Reads a bool from the reader, prompting the user until they enter y/n. func readBool(reader *bufio.Reader, prompt string, def bool) (bool, error) { for { - fmt.Print(prompt) - line, err := reader.ReadString('\n') - if err != nil { return false, err } - line = strings.ToLower(strings.TrimSpace(line)) - if line == "" { - return def, nil - } - switch line[0] { - case 'y': - return true, nil - case 'n': - return false, nil - } + fmt.Print(prompt) + line, err := reader.ReadString('\n') + if err != nil { + return false, err + } + line = strings.ToLower(strings.TrimSpace(line)) + if line == "" { + return def, nil + } + switch line[0] { + case 'y': + return true, nil + case 'n': + return false, nil + } fmt.Println("Please enter yes or no.") - } + } } // Reads an autoart.Config func readConf(reader *bufio.Reader, conf *autoart.Config) error { - positive := func (i int64) bool { return i > 0 } + positive := func(i int64) bool { return i > 0 } functionLength, err := readInt64(reader, "Function length (default: 40)? ", positive, 40) - if err != nil { return err } - colorSpace, err := readInt64(reader, `Which color space should be used? + if err != nil { + return err + } + colorSpace, err := readInt64(reader, `Which color space should be used? 1. RGB 2. Grayscale 3. CMYK 4. HSV 5. YCbCr -Please enter a number between 1 and 5 (default: 1): `, func (i int64) bool { - return i >= 1 && i <= 5 - }, 1) - - if err != nil { return err } - alpha, err := readBool(reader, "Should an alpha channel be included (yes/no, default: no)? ", false) - if err != nil { return err } +Please enter a number between 1 and 5 (default: 1): `, func(i int64) bool { + return i >= 1 && i <= 5 + }, 1) + if err != nil { + return err + } + alpha, err := readBool(reader, "Should an alpha channel be included (yes/no, default: no)? ", false) + if err != nil { + return err + } - rectifier, err := readInt64(reader, `How should out of range values be dealt with? + rectifier, err := readInt64(reader, `How should out of range values be dealt with? 1. Modulo 2. Clamp 3. Sigmoid -Please enter 1, 2, or 3 (default: 1): `, func (i int64) bool { - return i >= 1 && i <= 3 - }, 1) - if err != nil { return err } - - coords, err := readInt64(reader, `Which coordinate system should be used? +Please enter 1, 2, or 3 (default: 1): `, func(i int64) bool { + return i >= 1 && i <= 3 + }, 1) + if err != nil { + return err + } + + coords, err := readInt64(reader, `Which coordinate system should be used? 1. x, y 2. r, theta -Please enter 1 or 2 (default: 1): `, func (i int64) bool { - return i >= 1 && i <= 2 - }, 1) - if err != nil { return err } +Please enter 1 or 2 (default: 1): `, func(i int64) bool { + return i >= 1 && i <= 2 + }, 1) + if err != nil { + return err + } conf.FunctionLength = int(functionLength) conf.ColorSpace = int(colorSpace - 1) conf.Alpha = alpha conf.Rectifier = int(rectifier - 1) - conf.CoordinateSys = int(coords - 1) + conf.CoordinateSys = int(coords - 1) return nil } func readPaletteConf(reader *bufio.Reader, conf *autoart.PaletteConfig) error { - positive := func (i int64) bool { return i > 0 } + positive := func(i int64) bool { return i > 0 } ncolors, err := readInt64(reader, "How many colors do you want (default: 10)? ", positive, 10) - if err != nil { return err } + if err != nil { + return err + } alpha, err := readBool(reader, "Should an alpha channel be included (yes/no, default: no)? ", false) - if err != nil { return err } + if err != nil { + return err + } functionLength, err := readInt64(reader, "Function length (default: 40)? ", positive, 40) - if err != nil { return err } - coords, err := readInt64(reader, `Which coordinate system should be used? + if err != nil { + return err + } + coords, err := readInt64(reader, `Which coordinate system should be used? 1. x, y 2. r, theta -Please enter 1 or 2 (default: 1): `, func (i int64) bool { - return i >= 1 && i <= 2 - }, 1) - if err != nil { return err } +Please enter 1 or 2 (default: 1): `, func(i int64) bool { + return i >= 1 && i <= 2 + }, 1) + if err != nil { + return err + } conf.NColors = int(ncolors) conf.Alpha = alpha conf.FunctionLength = int(functionLength) - conf.CoordinateSys = int(coords - 1) + conf.CoordinateSys = int(coords - 1) return nil } |