91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
package utils
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import (
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"strings"
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"unicode"
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"git.fromouter.space/crunchy-rocks/draw2d"
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)
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func abs(i int) int {
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if i < 0 {
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return -i
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}
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return i
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}
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func SplitCenter(text string) []string {
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centerIndex := int(len(text) / 2)
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whitespaceFrontIndex := strings.IndexRune(text[centerIndex:], ' ')
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whitespaceBackIndex := strings.LastIndex(text[:centerIndex], " ")
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frontIndex := centerIndex + whitespaceFrontIndex
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frontDiff := 9999
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backDiff := 9999
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if whitespaceFrontIndex < 1 && whitespaceBackIndex < 1 {
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return []string{text}
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}
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if whitespaceFrontIndex >= 0 {
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frontDiff = len(text[:frontIndex]) - len(text[frontIndex:])
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}
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if whitespaceBackIndex >= 0 {
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backDiff = len(text[:whitespaceBackIndex]) - len(text[whitespaceBackIndex:])
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}
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if abs(frontDiff) < abs(backDiff) {
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return []string{strings.TrimSpace(text[:frontIndex]), strings.TrimSpace(text[frontIndex:])}
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}
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return []string{strings.TrimSpace(text[:whitespaceBackIndex]), strings.TrimSpace(text[whitespaceBackIndex:])}
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}
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// Word wrapping code from https://github.com/fogleman/gg
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// Copyright (C) 2016 Michael Fogleman
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// Licensed under MIT (https://github.com/fogleman/gg/blob/master/LICENSE.md)
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func splitOnSpace(x string) []string {
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var result []string
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pi := 0
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ps := false
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for i, c := range x {
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s := unicode.IsSpace(c)
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if s != ps && i > 0 {
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result = append(result, x[pi:i])
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pi = i
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}
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ps = s
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}
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result = append(result, x[pi:])
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return result
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}
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func WordWrap(gc draw2d.GraphicContext, s string, width float64) []string {
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var result []string
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for _, line := range strings.Split(s, "\n") {
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fields := splitOnSpace(line)
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if len(fields)%2 == 1 {
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fields = append(fields, "")
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}
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x := ""
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for i := 0; i < len(fields); i += 2 {
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left, _, right, _ := gc.GetStringBounds(x + fields[i])
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w := right - left
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if w > width {
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if x == "" {
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result = append(result, fields[i])
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x = ""
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continue
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} else {
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result = append(result, x)
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x = ""
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}
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}
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x += fields[i] + fields[i+1]
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}
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if x != "" {
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result = append(result, x)
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}
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}
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for i, line := range result {
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result[i] = strings.TrimSpace(line)
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}
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return result
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}
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