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85 lines
1.4 KiB
Go
85 lines
1.4 KiB
Go
package main
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import (
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"unicode/utf8"
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"github.com/mattn/go-runewidth"
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)
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func dropWrapAll(n *node) {
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for n != nil {
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if n.value != nil && n.value[0] == '"' {
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n.dropChunks()
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}
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if n.isCollapsed() {
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n = n.collapsed
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} else {
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n = n.next
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}
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}
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}
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func wrapAll(n *node, termWidth int) {
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if termWidth <= 0 {
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return
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}
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for n != nil {
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if n.value != nil && n.value[0] == '"' {
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n.dropChunks()
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lines, count := doWrap(n, termWidth)
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if count > 1 {
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n.chunk = lines[0]
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for i := 1; i < count; i++ {
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child := &node{
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directParent: n,
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depth: n.depth,
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chunk: lines[i],
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}
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if n.comma && i == count-1 {
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child.comma = true
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}
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n.insertChunk(child)
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}
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}
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}
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n = n.next
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}
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}
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func doWrap(n *node, termWidth int) ([][]byte, int) {
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lines := make([][]byte, 0, 1)
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width := int(n.depth) * 2
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if n.key != nil {
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for _, ch := range string(n.key) {
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width += runewidth.RuneWidth(ch)
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}
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width += 2 // for ": "
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}
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linesCount := 0
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start, end := 0, 0
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b := n.value
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for len(b) > 0 {
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r, size := utf8.DecodeRune(b)
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w := runewidth.RuneWidth(r)
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if width+w > termWidth {
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lines = append(lines, n.value[start:end])
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start = end
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width = int(n.depth) * 2
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linesCount++
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}
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width += w
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end += size
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b = b[size:]
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}
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if start < end {
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lines = append(lines, n.value[start:])
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linesCount++
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}
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return lines, linesCount
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}
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