fix tests

internal/filterable_viewport/filterable_viewport_test.go

@@ -33,7 +33,7 @@ type TestItem struct {
 
 func (t TestItem) Render() linebuffer.LineBufferer {
 	lb := linebuffer.New(t.content)
-	return &lb
+	return lb
 }
 
 func (t TestItem) String() string {

internal/viewport/linebuffer/multilinebuffer.go

@@ -70,17 +70,24 @@ func (m *MultiLineBuffer) SeekToWidth(width int) {
 		return
 	}
 
+	// reset all buffers before seeking
+	for _, buf := range m.buffers {
+		buf.SeekToWidth(0)
+	}
+
 	// find which buffer contains the target width
 	remainingWidth := width
+	m.currentBufferIdx = 0
+
 	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)
+			buf.SeekToWidth(remainingWidth)
 			return
 		}
 		remainingWidth -= bufWidth
+		m.currentBufferIdx = i + 1
 	}
 
 	// if we get here, we're seeking past the end
@@ -95,17 +102,27 @@ func (m *MultiLineBuffer) PopLeft(width int, continuation, toHighlight string, h
 		return ""
 	}
 
-	// get content from current buffer
-	result := m.buffers[m.currentBufferIdx].PopLeft(width, continuation, toHighlight, highlightStyle)
+	var result string
+	remainingWidth := width
+
+	for remainingWidth > 0 && m.currentBufferIdx < len(m.buffers) {
+		currentBuffer := m.buffers[m.currentBufferIdx]
+		chunk := currentBuffer.PopLeft(remainingWidth, continuation, toHighlight, highlightStyle)
+
+		if chunk == "" {
+			if m.currentBufferIdx < len(m.buffers)-1 {
+				m.currentBufferIdx++
+				continue
+			}
+			break
+		}
 
-	// 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
+		result += chunk
+		remainingWidth -= lipgloss.Width(chunk)
+
+		if remainingWidth > 0 && m.currentBufferIdx < len(m.buffers)-1 {
+			m.currentBufferIdx++
+		}
 	}
 
 	return result

internal/viewport/linebuffer/multlinebuffer_test.go

@@ -6,6 +6,7 @@ import (
 )
 
 var equivalentLineBuffers = map[string][]LineBufferer{
+	// TODO LEO: add ansi, unicode
 	"hello world": {
 		New("hello world"),
 		NewMulti(
@@ -71,6 +72,30 @@ func TestMultiLineBuffer_SeekToWidth(t *testing.T) {
 			continuation:    "",
 			expectedPopLeft: "hello w",
 		},
+		{
+			name:            "hello world 1",
+			key:             "hello world",
+			seekToWidth:     1,
+			takeWidth:       7,
+			continuation:    "",
+			expectedPopLeft: "ello wo",
+		},
+		{
+			name:            "hello world end",
+			key:             "hello world",
+			seekToWidth:     10,
+			takeWidth:       3,
+			continuation:    "",
+			expectedPopLeft: "d",
+		},
+		{
+			name:            "hello world past end",
+			key:             "hello world",
+			seekToWidth:     11,
+			takeWidth:       3,
+			continuation:    "",
+			expectedPopLeft: "",
+		},
 	}
 
 	for _, tt := range tests {
@@ -84,5 +109,3 @@ func TestMultiLineBuffer_SeekToWidth(t *testing.T) {
 		})
 	}
 }
-
-//func TestMultiLin