68 lines
1.4 KiB
Go
68 lines
1.4 KiB
Go
package prompt
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type Render struct {
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Prefix string
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out *VT100Writer
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row uint16
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col uint16 // sigwinchで送られてくる列数を常に見ながら、prefixのlengthとbufferのcursor positionを比べて、completionの表示位置をずらす
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}
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func (r *Render) PrepareArea(lines int) {
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for i := 0; i < lines; i++ {
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r.out.ScrollDown()
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}
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for i := 0; i < lines; i++ {
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r.out.ScrollUp()
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}
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return
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}
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func (r *Render) UpdateWinSize(ws *WinSize) {
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r.row = ws.Row
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r.col = ws.Col
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return
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}
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func (r *Render) RenderCompletion(words []string) {
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formatted, width := formatCompletions(words)
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l := len(formatted)
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r.PrepareArea(l)
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r.out.SetColor("white", "teal")
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for i := 0; i < l; i++ {
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r.out.CursorDown(1)
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r.out.WriteStr(" " + formatted[i] + " ")
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r.out.SetColor("white", "darkGray")
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r.out.Write([]byte(" "))
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r.out.SetColor("white", "teal")
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r.out.CursorBackward(width + 3)
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}
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r.out.CursorUp(l)
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r.out.SetColor("default", "default")
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return
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}
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func formatCompletions(words []string) ([]string, int) {
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num := len(words)
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width := 0
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for i := 0; i < num; i++ {
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if width < len([]rune(words[i])) {
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width = len([]rune(words[i]))
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}
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}
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for i := 0; i < num; i++ {
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spaces := width - len([]rune(words[i]))
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for j := 0; j < spaces; j++ {
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words[i] += " "
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}
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}
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return words, width
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}
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func (r *Render) Render(buffer *Buffer, completions []string) {
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r.out.Flush()
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}
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