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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| package linebuffer | ||
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| import "github.com/charmbracelet/lipgloss/v2" | ||
|
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| // MultiLineBuffer implements LineBufferer by wrapping multiple LineBuffers without extra memory allocation | ||
| type MultiLineBuffer struct { | ||
| buffers []LineBuffer | ||
| currentBufferIdx int // tracks which buffer we're currently reading from | ||
| totalWidth int // cached total width across all buffers | ||
| } | ||
|
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| // type assertion that *MultiLineBuffer implements LineBufferer | ||
| var _ LineBufferer = (*MultiLineBuffer)(nil) | ||
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| func NewMulti(buffers ...LineBuffer) *MultiLineBuffer { | ||
| if len(buffers) == 0 { | ||
| return &MultiLineBuffer{} | ||
| } | ||
|
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| // calculate total width | ||
| totalWidth := 0 | ||
| for _, buf := range buffers { | ||
| totalWidth += buf.Width() | ||
| } | ||
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| return &MultiLineBuffer{ | ||
| buffers: buffers, | ||
| totalWidth: totalWidth, | ||
| } | ||
| } | ||
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| func (m *MultiLineBuffer) Width() int { | ||
| return m.totalWidth | ||
| } | ||
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| // TODO LEO: don't use this for e.g. search, instead inject filter into a Matches() bool method here | ||
| func (m *MultiLineBuffer) Content() string { | ||
| totalLen := 0 | ||
| for _, buf := range m.buffers { | ||
| totalLen += len(buf.Content()) | ||
| } | ||
|
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| result := make([]byte, 0, totalLen) | ||
| for _, buf := range m.buffers { | ||
| result = append(result, buf.Content()...) | ||
| } | ||
| return string(result) | ||
| } | ||
|
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| func (m *MultiLineBuffer) SeekToWidth(width int) { | ||
| if width <= 0 { | ||
| m.currentBufferIdx = 0 | ||
| if len(m.buffers) > 0 { | ||
| m.buffers[0].SeekToWidth(0) | ||
| } | ||
| return | ||
| } | ||
|
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| // find which buffer contains the target width | ||
| remainingWidth := width | ||
| for i, buf := range m.buffers { | ||
| bufWidth := buf.Width() | ||
| if remainingWidth <= bufWidth { | ||
| // found the buffer containing our target | ||
| m.currentBufferIdx = i | ||
| m.buffers[i].SeekToWidth(remainingWidth) | ||
| return | ||
| } | ||
| remainingWidth -= bufWidth | ||
| } | ||
|
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| // if we get here, we're seeking past the end | ||
| if len(m.buffers) > 0 { | ||
| m.currentBufferIdx = len(m.buffers) - 1 | ||
| m.buffers[m.currentBufferIdx].SeekToWidth(m.buffers[m.currentBufferIdx].Width()) | ||
| } | ||
| } | ||
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| func (m *MultiLineBuffer) PopLeft(width int, continuation, toHighlight string, highlightStyle lipgloss.Style) string { | ||
| if len(m.buffers) == 0 || width == 0 { | ||
| return "" | ||
| } | ||
|
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| // get content from current buffer | ||
| result := m.buffers[m.currentBufferIdx].PopLeft(width, continuation, toHighlight, highlightStyle) | ||
|
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| // if we got less than requested width and have more buffers, move to next buffer | ||
| if resultWidth := lipgloss.Width(result); resultWidth < width && m.currentBufferIdx < len(m.buffers)-1 { | ||
| m.currentBufferIdx++ | ||
| m.buffers[m.currentBufferIdx].SeekToWidth(0) | ||
| // get remaining content from next buffer | ||
| remainingWidth := width - resultWidth | ||
| nextResult := m.buffers[m.currentBufferIdx].PopLeft(remainingWidth, continuation, toHighlight, highlightStyle) | ||
| result += nextResult | ||
| } | ||
|
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| return result | ||
| } | ||
|
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| func (m *MultiLineBuffer) WrappedLines(width int, maxLinesEachEnd int, toHighlight string, toHighlightStyle lipgloss.Style) []string { | ||
| if width <= 0 { | ||
| return nil | ||
| } | ||
|
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| // reset position | ||
| m.SeekToWidth(0) | ||
|
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| var result []string | ||
| currentLine := m.PopLeft(width, "", toHighlight, toHighlightStyle) | ||
| for currentLine != "" { | ||
| result = append(result, currentLine) | ||
| currentLine = m.PopLeft(width, "", toHighlight, toHighlightStyle) | ||
| } | ||
|
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| // handle maxLinesEachEnd if specified | ||
| if maxLinesEachEnd > 0 && len(result) > maxLinesEachEnd*2 { | ||
| firstN := result[:maxLinesEachEnd] | ||
| lastN := result[len(result)-maxLinesEachEnd:] | ||
| result = append(firstN, lastN...) | ||
| } | ||
|
|
||
| return result | ||
| } |
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