forked from sloum/bombadillo
93 lines
2.2 KiB
Go
93 lines
2.2 KiB
Go
package main
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import (
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"strings"
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)
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//------------------------------------------------\\
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// + + + T Y P E S + + + \\
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//--------------------------------------------------\\
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type Page struct {
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WrappedContent []string
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RawContent string
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Links []string
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Location Url
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ScrollPosition int
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}
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//------------------------------------------------\\
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// + + + R E C E I V E R S + + + \\
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//--------------------------------------------------\\
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func (p *Page) ScrollPositionRange(termHeight int) (int, int) {
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termHeight -= 3
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if len(p.WrappedContent) - p.ScrollPosition < termHeight {
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p.ScrollPosition = len(p.WrappedContent) - termHeight
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}
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if p.ScrollPosition < 0 {
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p.ScrollPosition = 0
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}
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var end int
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if len(p.WrappedContent) < termHeight {
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end = len(p.WrappedContent)
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} else {
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end = p.ScrollPosition + termHeight
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}
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return p.ScrollPosition, end
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}
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// Performs a hard wrap to the requested
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// width and updates the WrappedContent
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// of the Page struct width a string slice
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// of the wrapped data
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func (p *Page) WrapContent(width int) {
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counter := 0
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var content strings.Builder
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content.Grow(len(p.RawContent))
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for _, ch := range []rune(p.RawContent) {
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if ch == '\n' {
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content.WriteRune(ch)
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counter = 0
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} else if ch == '\t' {
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if counter + 4 < width {
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content.WriteString(" ")
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counter += 4
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} else {
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content.WriteRune('\n')
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counter = 0
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}
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} else if ch == '\r' || ch == '\v' || ch == '\b' || ch == '\f' || ch == 27 {
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// Get rid of control characters we dont want
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continue
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} else {
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if counter < width {
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content.WriteRune(ch)
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counter++
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} else {
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content.WriteRune('\n')
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counter = 0
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if p.Location.Mime == "1" {
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spacer := " "
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content.WriteString(spacer)
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counter += len(spacer)
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}
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content.WriteRune(ch)
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}
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}
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}
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p.WrappedContent = strings.Split(content.String(), "\n")
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}
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//------------------------------------------------\\
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// + + + F U N C T I O N S + + + \\
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//--------------------------------------------------\\
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func MakePage(url Url, content string, links []string) Page {
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p := Page{make([]string, 0), content, links, url, 0}
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return p
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}
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