fix(table): do not shrink table with offset (#373)

* test(table): test to show table shrinking with offset

* fix(table): do not shrink table height

Author: bashbunni

table/table.go

@@ -371,6 +371,11 @@ func (t *Table) String() string {
 			topHeight := lipgloss.Height(sb.String()) - 1
 			availableLines := t.height - (topHeight + lipgloss.Height(bottom))
 
+			// if the height is larger than the number of rows, use the number
+			// of rows.
+			if availableLines > t.data.Rows() {
+				availableLines = t.data.Rows()
+			}
 			sb.WriteString(t.constructRows(availableLines))
 
 		default:
@@ -496,13 +501,19 @@ func (t *Table) constructRows(availableLines int) string {
 	offsetRowCount := t.data.Rows() - t.offset
 
 	// The number of rows to render. We always render at least one row.
-	rowsToRender := min(availableLines, offsetRowCount)
+	rowsToRender := availableLines
 	rowsToRender = max(rowsToRender, 1)
 
 	// Check if we need to render an overflow row.
 	needsOverflow := rowsToRender < offsetRowCount
 
+	// only use the offset as the starting value if there is overflow.
 	rowIdx := t.offset
+	if !needsOverflow {
+		// if there is no overflow, just render to the height of the table
+		// check there's enough content to fill the table
+		rowIdx = t.data.Rows() - rowsToRender
+	}
 	for rowsToRender > 0 && rowIdx < t.data.Rows() {
 		// Whenever the height is too small to render all rows, the bottom row will be an overflow row (ellipsis).
 		isOverflow := needsOverflow && rowsToRender == 1

table/table_test.go

@@ -1214,6 +1214,120 @@ func TestCarriageReturn(t *testing.T) {
 	}
 }
 
+func TestTableShrinkWithOffset(t *testing.T) {
+	rows := [][]string{
+		{"1", "Tokyo", "Japan", "37,274,000"},
+		{"2", "Delhi", "India", "32,065,760"},
+		{"3", "Shanghai", "China", "28,516,904"},
+		{"4", "Dhaka", "Bangladesh", "22,478,116"},
+		{"5", "São Paulo", "Brazil", "22,429,800"},
+		{"6", "Mexico City", "Mexico", "22,085,140"},
+		{"7", "Cairo", "Egypt", "21,750,020"},
+		{"8", "Beijing", "China", "21,333,332"},
+		{"9", "Mumbai", "India", "20,961,472"},
+		{"10", "Osaka", "Japan", "19,059,856"},
+		{"11", "Chongqing", "China", "16,874,740"},
+		{"12", "Karachi", "Pakistan", "16,839,950"},
+		{"13", "Istanbul", "Turkey", "15,636,243"},
+		{"14", "Kinshasa", "DR Congo", "15,628,085"},
+		{"15", "Lagos", "Nigeria", "15,387,639"},
+		{"16", "Buenos Aires", "Argentina", "15,369,919"},
+		{"17", "Kolkata", "India", "15,133,888"},
+		{"18", "Manila", "Philippines", "14,406,059"},
+		{"19", "Tianjin", "China", "14,011,828"},
+		{"20", "Guangzhou", "China", "13,964,637"},
+		{"21", "Rio De Janeiro", "Brazil", "13,634,274"},
+		{"22", "Lahore", "Pakistan", "13,541,764"},
+		{"23", "Bangalore", "India", "13,193,035"},
+		{"24", "Shenzhen", "China", "12,831,330"},
+		{"25", "Moscow", "Russia", "12,640,818"},
+		{"26", "Chennai", "India", "11,503,293"},
+		{"27", "Bogota", "Colombia", "11,344,312"},
+		{"28", "Paris", "France", "11,142,303"},
+		{"29", "Jakarta", "Indonesia", "11,074,811"},
+		{"30", "Lima", "Peru", "11,044,607"},
+		{"31", "Bangkok", "Thailand", "10,899,698"},
+		{"32", "Hyderabad", "India", "10,534,418"},
+		{"33", "Seoul", "South Korea", "9,975,709"},
+		{"34", "Nagoya", "Japan", "9,571,596"},
+		{"35", "London", "United Kingdom", "9,540,576"},
+		{"36", "Chengdu", "China", "9,478,521"},
+		{"37", "Nanjing", "China", "9,429,381"},
+		{"38", "Tehran", "Iran", "9,381,546"},
+		{"39", "Ho Chi Minh City", "Vietnam", "9,077,158"},
+		{"40", "Luanda", "Angola", "8,952,496"},
+		{"41", "Wuhan", "China", "8,591,611"},
+		{"42", "Xi An Shaanxi", "China", "8,537,646"},
+		{"43", "Ahmedabad", "India", "8,450,228"},
+		{"44", "Kuala Lumpur", "Malaysia", "8,419,566"},
+		{"45", "New York City", "United States", "8,177,020"},
+		{"46", "Hangzhou", "China", "8,044,878"},
+		{"47", "Surat", "India", "7,784,276"},
+		{"48", "Suzhou", "China", "7,764,499"},
+		{"49", "Hong Kong", "Hong Kong", "7,643,256"},
+		{"50", "Riyadh", "Saudi Arabia", "7,538,200"},
+		{"51", "Shenyang", "China", "7,527,975"},
+		{"52", "Baghdad", "Iraq", "7,511,920"},
+		{"53", "Dongguan", "China", "7,511,851"},
+		{"54", "Foshan", "China", "7,497,263"},
+		{"55", "Dar Es Salaam", "Tanzania", "7,404,689"},
+		{"56", "Pune", "India", "6,987,077"},
+		{"57", "Santiago", "Chile", "6,856,939"},
+		{"58", "Madrid", "Spain", "6,713,557"},
+		{"59", "Haerbin", "China", "6,665,951"},
+		{"60", "Toronto", "Canada", "6,312,974"},
+		{"61", "Belo Horizonte", "Brazil", "6,194,292"},
+		{"62", "Khartoum", "Sudan", "6,160,327"},
+		{"63", "Johannesburg", "South Africa", "6,065,354"},
+		{"64", "Singapore", "Singapore", "6,039,577"},
+		{"65", "Dalian", "China", "5,930,140"},
+		{"66", "Qingdao", "China", "5,865,232"},
+		{"67", "Zhengzhou", "China", "5,690,312"},
+		{"68", "Ji Nan Shandong", "China", "5,663,015"},
+		{"69", "Barcelona", "Spain", "5,658,472"},
+		{"70", "Saint Petersburg", "Russia", "5,535,556"},
+		{"71", "Abidjan", "Ivory Coast", "5,515,790"},
+		{"72", "Yangon", "Myanmar", "5,514,454"},
+		{"73", "Fukuoka", "Japan", "5,502,591"},
+		{"74", "Alexandria", "Egypt", "5,483,605"},
+		{"75", "Guadalajara", "Mexico", "5,339,583"},
+		{"76", "Ankara", "Turkey", "5,309,690"},
+		{"77", "Chittagong", "Bangladesh", "5,252,842"},
+		{"78", "Addis Ababa", "Ethiopia", "5,227,794"},
+		{"79", "Melbourne", "Australia", "5,150,766"},
+		{"80", "Nairobi", "Kenya", "5,118,844"},
+		{"81", "Hanoi", "Vietnam", "5,067,352"},
+		{"82", "Sydney", "Australia", "5,056,571"},
+		{"83", "Monterrey", "Mexico", "5,036,535"},
+		{"84", "Changsha", "China", "4,809,887"},
+		{"85", "Brasilia", "Brazil", "4,803,877"},
+		{"86", "Cape Town", "South Africa", "4,800,954"},
+		{"87", "Jiddah", "Saudi Arabia", "4,780,740"},
+		{"88", "Urumqi", "China", "4,710,203"},
+		{"89", "Kunming", "China", "4,657,381"},
+		{"90", "Changchun", "China", "4,616,002"},
+		{"91", "Hefei", "China", "4,496,456"},
+		{"92", "Shantou", "China", "4,490,411"},
+		{"93", "Xinbei", "Taiwan", "4,470,672"},
+		{"94", "Kabul", "Afghanistan", "4,457,882"},
+		{"95", "Ningbo", "China", "4,405,292"},
+		{"96", "Tel Aviv", "Israel", "4,343,584"},
+		{"97", "Yaounde", "Cameroon", "4,336,670"},
+		{"98", "Rome", "Italy", "4,297,877"},
+		{"99", "Shijiazhuang", "China", "4,285,135"},
+		{"100", "Montreal", "Canada", "4,276,526"},
+	}
+	table := New().
+		Rows(rows...).
+		Offset(80).
+		Height(45)
+
+	got := lipgloss.Height(table.String())
+	if got != table.height {
+		t.Fatalf("expected the height to be %d with an offset of %d. got: table with height %d\n%s", table.height, table.offset, got, table.String())
+	}
+}
+
 func debug(s string) string {
 	return strings.ReplaceAll(s, " ", ".")
 }