v0.1.6 tui clipped box, scrollbar, and keyvalue improvements, single column document widget added
This commit is contained in:
+27
-15
@@ -38,7 +38,14 @@ const (
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// Box draws border around region edge
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func (r Region) Box(line LineType, fg color.RGB) {
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if r.W < 2 || r.H < 2 {
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r.BoxClipped(line, fg, r.H, 0)
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}
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// BoxClipped draws the visible slice of a box whose logical height is totalH,
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// with off rows scrolled past its top edge. Rows outside the box are skipped,
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// so a partially visible box keeps its sides and grows no false edges.
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func (r Region) BoxClipped(line LineType, fg color.RGB, totalH, off int) {
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if r.W < 2 || r.H < 1 || totalH < 2 {
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return
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}
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if line >= LineType(len(boxChars)) {
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@@ -48,24 +55,30 @@ func (r Region) Box(line LineType, fg color.RGB) {
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chars := boxChars[line]
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bg := color.RGB{} // Transparent (use existing bg)
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// Corners
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r.Cell(0, 0, chars[boxTL], fg, bg, terminal.AttrNone)
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r.Cell(r.W-1, 0, chars[boxTR], fg, bg, terminal.AttrNone)
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r.Cell(0, r.H-1, chars[boxBL], fg, bg, terminal.AttrNone)
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r.Cell(r.W-1, r.H-1, chars[boxBR], fg, bg, terminal.AttrNone)
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// Horizontal edges
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for x := 1; x < r.W-1; x++ {
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r.Cell(x, 0, chars[boxH], fg, bg, terminal.AttrNone)
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r.Cell(x, r.H-1, chars[boxH], fg, bg, terminal.AttrNone)
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for y := range r.H {
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c := off + y
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if c < 0 || c >= totalH {
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continue
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}
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// Vertical edges
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for y := 1; y < r.H-1; y++ {
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switch c {
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case 0:
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r.Cell(0, y, chars[boxTL], fg, bg, terminal.AttrNone)
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r.Cell(r.W-1, y, chars[boxTR], fg, bg, terminal.AttrNone)
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for x := 1; x < r.W-1; x++ {
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r.Cell(x, y, chars[boxH], fg, bg, terminal.AttrNone)
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}
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case totalH - 1:
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r.Cell(0, y, chars[boxBL], fg, bg, terminal.AttrNone)
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r.Cell(r.W-1, y, chars[boxBR], fg, bg, terminal.AttrNone)
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for x := 1; x < r.W-1; x++ {
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r.Cell(x, y, chars[boxH], fg, bg, terminal.AttrNone)
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}
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default:
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r.Cell(0, y, chars[boxV], fg, bg, terminal.AttrNone)
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r.Cell(r.W-1, y, chars[boxV], fg, bg, terminal.AttrNone)
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}
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}
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}
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// BoxFilled draws border and fills interior with background
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func (r Region) BoxFilled(line LineType, fg, bg color.RGB) {
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@@ -158,4 +171,3 @@ func (r Region) Card(title string, line LineType, fg color.RGB) Region {
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return r.Inset(1)
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}
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+224
@@ -0,0 +1,224 @@
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package tui
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// DocKind classifies a document block
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type DocKind uint8
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const (
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DocSection DocKind = iota // Section header with an inline rule
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DocEntry // Key + description in aligned columns
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DocPara // Wrapped paragraph across the document width
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DocGap // One blank row
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)
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// DocBlock is one logical unit of a document
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type DocBlock struct {
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Kind DocKind
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Key string // DocEntry only
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Text string
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}
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// DocOpts configures document layout and rendering
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// Layout-affecting fields must not change between Layout and Doc
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type DocOpts struct {
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HeaderStyle Style
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KeyStyle Style
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TextStyle Style
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RuleStyle Style
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Rule LineType // Header rule; LineNone draws the header alone
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KeyWidth int // Fixed key column, 0 = measured from the entries
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KeyMaxW int // Cap for the measured key column, 0 = 40% of width
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MinTextW int // Text column narrower than this stacks every entry
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Gap int // Columns between key and text, minimum 1
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Indent int // Left indent of section content
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StackIndent int // Indent of a stacked description
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SectionGap int // Blank rows before a section header
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MaxWidth int // Document width cap, 0 = region width
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Center bool // Center the document when the cap applies
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}
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// Row kinds in the flattened document
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const (
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docRowBlank uint8 = iota
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docRowSection
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docRowKey // Stacked entry key, left-aligned
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docRowEntry // Key column plus the first description line
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docRowText // Continuation or stacked description line
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)
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type docRow struct {
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key string
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text string
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x int
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kind uint8
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}
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// DocState holds a laid-out document and its scroll position
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type DocState struct {
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Viewport *ViewportScroll
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rows []docRow
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width int // Document width used by the layout
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xOff int // Document offset within the render region
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keyW int
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gap int
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}
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// NewDocState creates document state
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func NewDocState() *DocState {
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return &DocState{Viewport: NewViewportScroll()}
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}
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// SetViewport updates viewport height
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func (d *DocState) SetViewport(h int) {
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d.Viewport.ViewportH = h
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d.Viewport.ScrollTo(d.Viewport.Offset)
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}
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// Layout flattens blocks into rows for the given width; the row count becomes
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// the viewport content height. Entries stack when the text column is too
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// narrow, and an over-long key stacks on its own rather than truncating.
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func (d *DocState) Layout(blocks []DocBlock, width int, opts DocOpts) {
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d.rows = d.rows[:0]
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if width < 1 {
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d.width, d.Viewport.ContentH = 0, 0
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return
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}
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docW := width
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if opts.MaxWidth > 0 && docW > opts.MaxWidth {
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docW = opts.MaxWidth
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}
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d.width = docW
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d.xOff = 0
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if opts.Center {
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d.xOff = (width - docW) / 2
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}
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d.gap = max(opts.Gap, 1)
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indent := min(max(opts.Indent, 0), docW-1)
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keyMax := opts.KeyMaxW
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if keyMax <= 0 {
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keyMax = docW * 2 / 5
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}
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keyMax = min(keyMax, max(docW/2, 1))
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keyW := opts.KeyWidth
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if keyW <= 0 {
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for i := range blocks {
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if blocks[i].Kind != DocEntry {
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continue
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}
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if n := RuneLen(blocks[i].Key); n > keyW && n <= keyMax {
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keyW = n
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}
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}
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}
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d.keyW = min(max(keyW, 1), keyMax)
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textX := indent + d.keyW + d.gap
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textW := docW - textX
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stackX := min(indent+max(opts.StackIndent, 0), docW-1)
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stackW := max(docW-stackX, 1)
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stacked := textW < opts.MinTextW || textW < 1
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for i := range blocks {
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b := &blocks[i]
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switch b.Kind {
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case DocGap:
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d.rows = append(d.rows, docRow{kind: docRowBlank})
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case DocSection:
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for range opts.SectionGap {
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if len(d.rows) > 0 {
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d.rows = append(d.rows, docRow{kind: docRowBlank})
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}
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}
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d.rows = append(d.rows, docRow{kind: docRowSection, text: b.Text})
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case DocPara:
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for _, line := range WrapText(b.Text, max(docW-indent, 1)) {
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d.rows = append(d.rows, docRow{kind: docRowText, x: indent, text: line})
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}
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case DocEntry:
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// Narrow document: every entry stacks at the stack indent
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if stacked {
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d.rows = append(d.rows, docRow{kind: docRowKey, x: indent, key: b.Key})
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for _, line := range WrapText(b.Text, stackW) {
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d.rows = append(d.rows, docRow{kind: docRowText, x: stackX, text: line})
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}
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continue
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}
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// Over-long key stacks alone but keeps the shared text column
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if RuneLen(b.Key) > d.keyW {
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d.rows = append(d.rows, docRow{kind: docRowKey, x: indent, key: b.Key})
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for _, line := range WrapText(b.Text, textW) {
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d.rows = append(d.rows, docRow{kind: docRowText, x: textX, text: line})
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}
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continue
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}
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lines := WrapText(b.Text, textW)
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d.rows = append(d.rows, docRow{kind: docRowEntry, x: indent, key: b.Key, text: lines[0]})
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for _, line := range lines[1:] {
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d.rows = append(d.rows, docRow{kind: docRowText, x: textX, text: line})
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}
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}
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}
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d.Viewport.ContentH = len(d.rows)
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}
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// Doc renders the visible window of a laid-out document
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func (r Region) Doc(d *DocState, opts DocOpts) {
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if d == nil || r.H < 1 || r.W < 1 {
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return
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}
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d.Viewport.SetDimensions(len(d.rows), r.H)
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for y := range r.H {
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i := d.Viewport.Offset + y
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if i >= len(d.rows) {
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break
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}
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row := &d.rows[i]
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x := d.xOff + row.x
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switch row.kind {
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case docRowSection:
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r.docSection(y, d.xOff, d.width, row.text, opts)
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case docRowKey:
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r.TextStyled(x, y, row.key, opts.KeyStyle)
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case docRowEntry:
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r.TextStyled(x+d.keyW-RuneLen(row.key), y, row.key, opts.KeyStyle)
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r.TextStyled(x+d.keyW+d.gap, y, row.text, opts.TextStyle)
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case docRowText:
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r.TextStyled(x, y, row.text, opts.TextStyle)
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}
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}
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}
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// docSection draws a full-width rule with the label inset from the left
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func (r Region) docSection(y, x, w int, label string, opts DocOpts) {
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if opts.Rule == LineNone {
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r.TextStyled(x, y, label, opts.HeaderStyle)
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return
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}
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line := opts.Rule
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if line >= LineType(len(boxChars)) {
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line = LineSingle
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}
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ch := boxChars[line][boxH]
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for i := range w {
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r.Cell(x+i, y, ch, opts.RuleStyle.Fg, opts.RuleStyle.Bg, opts.RuleStyle.Attr)
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}
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if label == "" {
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return
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}
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const lead = 2
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text := " " + label + " "
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if RuneLen(text)+lead > w {
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text = Truncate(text, max(w-lead, 1))
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}
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r.TextStyled(x+lead, y, text, opts.HeaderStyle)
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}
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+50
-156
@@ -4,82 +4,57 @@ import (
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"github.com/lixenwraith/terminal"
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)
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// KeyValue renders right-aligned key, separator, left-aligned value on row
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// Key width auto-sizes based on content, capped at 40% of region width
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// Value gets remainder, minimum 30% of region width
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// keyValueSplit divides a row between the key and value columns, excluding the
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// separator. Each column takes the width it needs and yields only when that
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// would push the other below a third of the row.
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func keyValueSplit(width, keyLen, valLen int) (keyW, valW int) {
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avail := width - 1 // Separator column
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if avail < 2 {
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return 1, 1
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}
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third := max(avail/3, 1)
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keyW = max(keyLen, 1)
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if valFloor := min(valLen, third); avail-keyW < valFloor {
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keyW = avail - valFloor
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}
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keyW = min(max(keyW, min(keyLen, third)), avail-1)
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return keyW, avail - keyW
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}
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// KeyValue renders right-aligned key, separator and left-aligned value on row y,
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// sizing the key column to this row alone
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func (r Region) KeyValue(y int, key, value string, keyStyle, valStyle Style, sep rune) {
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r.KeyValueColumn(y, 0, key, value, keyStyle, valStyle, sep)
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}
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// KeyValueColumn renders a key-value row against an explicit key column, so a
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// set of rows aligns on the separator; keyW <= 0 sizes the column to this row
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func (r Region) KeyValueColumn(y, keyW int, key, value string, keyStyle, valStyle Style, sep rune) {
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if y < 0 || y >= r.H || r.W < 3 {
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return
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}
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keyLen := RuneLen(key)
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// Dynamic allocation: key gets what it needs up to 40%
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maxKeyW := (r.W * 2) / 5 // 40%
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minValW := (r.W * 3) / 10 // 30%
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keyW := keyLen
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if keyW > maxKeyW {
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keyW = maxKeyW
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}
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if keyW < 1 {
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keyW = 1
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}
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valW := r.W - keyW - 1 // -1 for separator
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if valW < minValW && r.W > minValW+2 {
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// Reclaim from key to meet minimum value width
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valW = minValW
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keyW = r.W - valW - 1
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if keyW < 1 {
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keyW = 1
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valW = r.W - 2
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}
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}
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if valW < 1 {
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valW = 1
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}
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// Truncate key if needed
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keyRunes := []rune(key)
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if len(keyRunes) > keyW {
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if keyW > 1 {
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keyRunes = keyRunes[:keyW-1]
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keyRunes = append(keyRunes, '…')
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var valW int
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if keyW <= 0 {
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keyW, valW = keyValueSplit(r.W, RuneLen(key), RuneLen(value))
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} else {
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keyRunes = keyRunes[:1]
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}
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keyW = min(max(keyW, 1), r.W-2)
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valW = r.W - keyW - 1
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}
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// Truncate value if needed
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valRunes := []rune(value)
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if len(valRunes) > valW {
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if valW > 1 {
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valRunes = valRunes[:valW-1]
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valRunes = append(valRunes, '…')
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} else {
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valRunes = valRunes[:1]
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}
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}
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key = Truncate(key, keyW)
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value = Truncate(value, valW)
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// Right-align key within allocated width
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keyX := keyW - len(keyRunes)
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for i, ch := range keyRunes {
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r.Cell(keyX+i, y, ch, keyStyle.Fg, keyStyle.Bg, keyStyle.Attr)
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}
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// Separator
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// Key is right-aligned within its column, so the separators line up when
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// callers share a column width
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r.TextStyled(keyW-RuneLen(key), y, key, keyStyle)
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r.Cell(keyW, y, sep, keyStyle.Fg, keyStyle.Bg, terminal.AttrDim)
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// Left-align value
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for i, ch := range valRunes {
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r.Cell(keyW+1+i, y, ch, valStyle.Fg, valStyle.Bg, valStyle.Attr)
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}
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r.TextStyled(keyW+1, y, value, valStyle)
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}
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// KeyValueWrap renders key-value with value wrapping to subsequent lines
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// Returns number of lines used
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// Layout:
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// KeyValueWrap renders a key with its value wrapped into the value column,
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// returning the number of lines used
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//
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// key: value text that is
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// long and wraps to
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@@ -89,111 +64,30 @@ func (r Region) KeyValueWrap(y int, key, value string, keyStyle, valStyle Style,
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return 0
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}
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keyLen := RuneLen(key)
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keyW, valW := keyValueSplit(r.W, RuneLen(key), RuneLen(value))
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k := Truncate(key, keyW)
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// Dynamic allocation same as KeyValue
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maxKeyW := (r.W * 2) / 5 // 40%
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minValW := (r.W * 3) / 10 // 30%
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keyW := keyLen
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if keyW > maxKeyW {
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keyW = maxKeyW
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}
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if keyW < 1 {
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keyW = 1
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}
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valW := r.W - keyW - 1 // -1 for separator
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if valW < minValW && r.W > minValW+2 {
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valW = minValW
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keyW = r.W - valW - 1
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if keyW < 1 {
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keyW = 1
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valW = r.W - 2
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}
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}
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if valW < 1 {
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valW = 1
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}
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// Truncate key if needed
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keyRunes := []rune(key)
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if len(keyRunes) > keyW {
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if keyW > 1 {
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keyRunes = keyRunes[:keyW-1]
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keyRunes = append(keyRunes, '…')
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} else {
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keyRunes = keyRunes[:1]
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}
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}
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// Right-align key within allocated width
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keyX := keyW - len(keyRunes)
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for i, ch := range keyRunes {
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r.Cell(keyX+i, y, ch, keyStyle.Fg, keyStyle.Bg, keyStyle.Attr)
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}
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// Separator
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r.TextStyled(keyW-RuneLen(k), y, k, keyStyle)
|
||||
r.Cell(keyW, y, sep, keyStyle.Fg, keyStyle.Bg, terminal.AttrDim)
|
||||
|
||||
// Wrap value text
|
||||
valueX := keyW + 1
|
||||
lines := WrapText(value, valW)
|
||||
if len(lines) == 0 {
|
||||
return 1
|
||||
}
|
||||
|
||||
rendered := 0
|
||||
for i, line := range lines {
|
||||
lineY := y + i
|
||||
if lineY >= r.H {
|
||||
for i, line := range WrapText(value, valW) {
|
||||
if y+i >= r.H {
|
||||
break
|
||||
}
|
||||
r.Text(valueX, lineY, line, valStyle.Fg, valStyle.Bg, valStyle.Attr)
|
||||
r.TextStyled(keyW+1, y+i, line, valStyle)
|
||||
rendered++
|
||||
}
|
||||
|
||||
if rendered < 1 {
|
||||
rendered = 1
|
||||
}
|
||||
return rendered
|
||||
return max(rendered, 1)
|
||||
}
|
||||
|
||||
// MeasureKeyValueWrap calculates lines needed for KeyValueWrap without rendering
|
||||
// Useful for layout pre-calculation
|
||||
// MeasureKeyValueWrap returns the line count KeyValueWrap needs, for layout
|
||||
// pre-calculation. Shares the column split with the renderer, so the two agree.
|
||||
func (r Region) MeasureKeyValueWrap(key, value string) int {
|
||||
if r.W < 3 {
|
||||
return 1
|
||||
}
|
||||
|
||||
keyLen := RuneLen(key)
|
||||
maxKeyW := (r.W * 2) / 5
|
||||
minValW := (r.W * 3) / 10
|
||||
|
||||
keyW := keyLen
|
||||
if keyW > maxKeyW {
|
||||
keyW = maxKeyW
|
||||
}
|
||||
if keyW < 1 {
|
||||
keyW = 1
|
||||
_, valW := keyValueSplit(r.W, RuneLen(key), RuneLen(value))
|
||||
return max(len(WrapText(value, valW)), 1)
|
||||
}
|
||||
|
||||
valW := r.W - keyW - 1
|
||||
if valW < minValW && r.W > minValW+2 {
|
||||
valW = minValW
|
||||
keyW = r.W - valW - 1
|
||||
if keyW < 1 {
|
||||
keyW = 1
|
||||
valW = r.W - 2
|
||||
}
|
||||
}
|
||||
if valW < 1 {
|
||||
valW = 1
|
||||
}
|
||||
|
||||
lines := WrapText(value, valW)
|
||||
if len(lines) == 0 {
|
||||
return 1
|
||||
}
|
||||
return len(lines)
|
||||
}
|
||||
+11
-17
@@ -16,7 +16,8 @@ type MasonryLayout struct {
|
||||
// MasonryOpts configures masonry layout
|
||||
type MasonryOpts struct {
|
||||
Columns int
|
||||
Gap int
|
||||
GapX int // Columns between masonry columns
|
||||
GapY int // Rows between stacked items
|
||||
MinColW int
|
||||
Breakpoints map[int]int
|
||||
}
|
||||
@@ -24,7 +25,8 @@ type MasonryOpts struct {
|
||||
// DefaultMasonryOpts returns sensible defaults
|
||||
func DefaultMasonryOpts() MasonryOpts {
|
||||
return MasonryOpts{
|
||||
Gap: 1,
|
||||
GapX: 2,
|
||||
GapY: 1,
|
||||
MinColW: 30,
|
||||
Breakpoints: map[int]int{
|
||||
140: 4,
|
||||
@@ -54,15 +56,10 @@ func (m *MasonryState) CalculateLayout(items []MasonryItem, width int, opts Maso
|
||||
cols = m.autoColumns(width, opts)
|
||||
}
|
||||
|
||||
gap := opts.Gap
|
||||
if gap < 0 {
|
||||
gap = 1
|
||||
}
|
||||
gapX := max(opts.GapX, 0)
|
||||
gapY := max(opts.GapY, 0)
|
||||
|
||||
colW := (width - (cols-1)*gap) / cols
|
||||
if colW < 1 {
|
||||
colW = 1
|
||||
}
|
||||
colW := max((width-(cols-1)*gapX)/cols, 1)
|
||||
|
||||
m.Layouts = make([]MasonryLayout, 0, len(items))
|
||||
colHeights := make([]int, cols)
|
||||
@@ -77,7 +74,7 @@ func (m *MasonryState) CalculateLayout(items []MasonryItem, width int, opts Maso
|
||||
}
|
||||
}
|
||||
|
||||
x := minCol * (colW + gap)
|
||||
x := minCol * (colW + gapX)
|
||||
y := colHeights[minCol]
|
||||
|
||||
m.Layouts = append(m.Layouts, MasonryLayout{
|
||||
@@ -85,7 +82,7 @@ func (m *MasonryState) CalculateLayout(items []MasonryItem, width int, opts Maso
|
||||
Item: item,
|
||||
})
|
||||
|
||||
colHeights[minCol] += item.Height + gap
|
||||
colHeights[minCol] += item.Height + gapY
|
||||
}
|
||||
|
||||
totalH := 0
|
||||
@@ -95,7 +92,7 @@ func (m *MasonryState) CalculateLayout(items []MasonryItem, width int, opts Maso
|
||||
}
|
||||
}
|
||||
if totalH > 0 {
|
||||
totalH -= gap
|
||||
totalH -= gapY
|
||||
}
|
||||
|
||||
m.Viewport.ContentH = totalH
|
||||
@@ -114,10 +111,7 @@ func (m *MasonryState) autoColumns(width int, opts MasonryOpts) int {
|
||||
return best
|
||||
}
|
||||
|
||||
cols := width / opts.MinColW
|
||||
if cols < 1 {
|
||||
cols = 1
|
||||
}
|
||||
cols := max(width/opts.MinColW, 1)
|
||||
return cols
|
||||
}
|
||||
|
||||
|
||||
+31
-15
@@ -5,45 +5,61 @@ import (
|
||||
"github.com/lixenwraith/terminal"
|
||||
)
|
||||
|
||||
// ScrollBar draws vertical scrollbar track with thumb
|
||||
// ScrollBarOpts configures scrollbar rendering
|
||||
type ScrollBarOpts struct {
|
||||
ThumbFg color.RGB
|
||||
TrackFg color.RGB
|
||||
Bg color.RGB // Zero inherits the existing cell background
|
||||
Thumb rune // 0 = '█'
|
||||
Track rune // 0 = '░'
|
||||
HideIdle bool // Draw nothing when content fits the viewport
|
||||
}
|
||||
|
||||
// ScrollBar draws a vertical scrollbar track with thumb in a single color
|
||||
func (r Region) ScrollBar(x int, offset, visible, total int, fg color.RGB) {
|
||||
r.ScrollBarStyled(x, offset, visible, total, ScrollBarOpts{ThumbFg: fg, TrackFg: fg})
|
||||
}
|
||||
|
||||
// ScrollBarStyled draws a vertical scrollbar at column x with explicit styling
|
||||
func (r Region) ScrollBarStyled(x int, offset, visible, total int, opts ScrollBarOpts) {
|
||||
if x < 0 || x >= r.W || r.H < 1 {
|
||||
return
|
||||
}
|
||||
|
||||
thumbCh, trackCh := opts.Thumb, opts.Track
|
||||
if thumbCh == 0 {
|
||||
thumbCh = '█'
|
||||
}
|
||||
if trackCh == 0 {
|
||||
trackCh = '░'
|
||||
}
|
||||
|
||||
trackH := r.H
|
||||
if total <= visible || trackH < 3 {
|
||||
// No scrolling needed or track too small
|
||||
if opts.HideIdle {
|
||||
return
|
||||
}
|
||||
for y := range trackH {
|
||||
r.Cell(x, y, '│', fg, color.RGB{}, terminal.AttrDim)
|
||||
r.Cell(x, y, '│', opts.TrackFg, opts.Bg, terminal.AttrDim)
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
// Calculate thumb size and position
|
||||
thumbH := min(max((visible*trackH)/total, 1), trackH)
|
||||
|
||||
maxScroll := total - visible
|
||||
thumbY := 0
|
||||
if maxScroll > 0 {
|
||||
thumbY = (offset * (trackH - thumbH)) / maxScroll
|
||||
}
|
||||
if thumbY < 0 {
|
||||
thumbY = 0
|
||||
}
|
||||
if thumbY+thumbH > trackH {
|
||||
thumbY = trackH - thumbH
|
||||
}
|
||||
thumbY = min(max(thumbY, 0), trackH-thumbH)
|
||||
|
||||
// Draw track and thumb
|
||||
for y := range trackH {
|
||||
var ch rune
|
||||
if y >= thumbY && y < thumbY+thumbH {
|
||||
ch = '█'
|
||||
r.Cell(x, y, thumbCh, opts.ThumbFg, opts.Bg, terminal.AttrNone)
|
||||
} else {
|
||||
ch = '░'
|
||||
r.Cell(x, y, trackCh, opts.TrackFg, opts.Bg, terminal.AttrDim)
|
||||
}
|
||||
r.Cell(x, y, ch, fg, color.RGB{}, terminal.AttrNone)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@@ -105,3 +105,15 @@ func (v *ViewportScroll) ClipToViewport(y, h int) (viewY, viewH, contentOffset i
|
||||
|
||||
return viewY, viewH, contentOffset, viewH > 0
|
||||
}
|
||||
|
||||
// EnsureRange scrolls the least distance that brings a content row range into
|
||||
// view; a range taller than the viewport is top-aligned
|
||||
func (v *ViewportScroll) EnsureRange(y, h int) {
|
||||
switch {
|
||||
case h >= v.ViewportH || y < v.Offset:
|
||||
v.Offset = y
|
||||
case y+h > v.Offset+v.ViewportH:
|
||||
v.Offset = y + h - v.ViewportH
|
||||
}
|
||||
v.clamp()
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user