added arrangement into empty space, if available

component/textbox/textbox.go

@@ -48,7 +48,7 @@ func (t *TextBox) Draw(buffer *ui.Buffer) {
 	rows := ui.SplitCells(cells, '\n')
 
 	for y, row := range rows {
-		if y+t.Inner.Min.Y >= t.Inner.Max.Y {
+		if y+t.Inner.Min.Y >= t.Inner.Max.Y-1 {
 			break
 		}
 		row = ui.TrimCells(row, t.Inner.Dx()-2)

config/arrangement.go

@@ -1,7 +1,9 @@
 package config
 
 import (
+	ui "github.com/gizak/termui/v3"
 	"github.com/sqshq/sampler/console"
+	"image"
 )
 
 func (c *Config) setDefaultArrangement() {
@@ -13,11 +15,23 @@ func (c *Config) setDefaultArrangement() {
 	}
 
 	for _, component := range components {
-		if component.Position == nil {
+		if component.Position == nil || len(component.Position) == 0 {
 
 			lc := getLargestComponent(components)
-			lr := lc.GetRectangle()
+			le := getLargestEmptySpaceRectangle(components)
 
+			if getSquare(lc) > le.Dx()*le.Dy()*2 {
+				arrangeIntoLargestComponent(component, lc)
+			} else {
+				arrangeIntoLargestEmptySpace(component, le)
+			}
+		}
+	}
+}
+
+func arrangeIntoLargestComponent(component *ComponentConfig, lc *ComponentConfig) {
+
+	lr := lc.GetRectangle()
 	var w, h, ws, hs int
 
 	if lr.Dx()/2 > lr.Dy() {
@@ -31,17 +45,20 @@ func (c *Config) setDefaultArrangement() {
 		ws = 0
 		hs = h
 	}
-
 	component.Position = [][]int{
 		{lr.Min.X + ws, lr.Min.Y + hs},
 		{w, h},
 	}
-
 	lc.Position = [][]int{
 		{lr.Min.X, lr.Min.Y},
 		{w, h},
 	}
 }
+
+func arrangeIntoLargestEmptySpace(component *ComponentConfig, le image.Rectangle) {
+	component.Position = [][]int{
+		{le.Min.X, le.Min.Y},
+		{le.Dx(), le.Dy()},
 	}
 }
 
@@ -99,10 +116,82 @@ func getComponents(c *Config) []*ComponentConfig {
 }
 
 func setSingleComponentPosition(c *ComponentConfig) {
-	w := int(console.ColumnsCount * 0.8)
-	h := int(console.RowsCount * 0.7)
+	w := int(console.ColumnsCount)
+	h := int(console.RowsCount * 0.6)
 	c.Position = [][]int{
 		{(console.ColumnsCount - w) / 2, (console.RowsCount - h) / 2},
 		{w, h},
 	}
 }
+
+func getLargestEmptySpaceRectangle(components []*ComponentConfig) image.Rectangle {
+
+	grid := [console.RowsCount][console.ColumnsCount]int{}
+
+	for _, component := range components {
+		rect := component.GetRectangle()
+		for r := ui.MinInt(console.RowsCount, rect.Min.Y); r < ui.MinInt(console.RowsCount, rect.Max.Y); r++ {
+			for c := ui.MinInt(console.ColumnsCount, rect.Min.X); c < ui.MinInt(console.ColumnsCount, rect.Max.X); c++ {
+				grid[r][c] = 1
+			}
+		}
+	}
+
+	mr := image.ZR
+
+	for row := 0; row < console.RowsCount; row++ {
+		histogram := createHistogram(grid, row)
+		r := calcMaxRectangle(histogram, row)
+		if r.Dx()*r.Dy() > mr.Dx()*mr.Dy() {
+			mr = r
+		}
+	}
+
+	return mr
+}
+
+func calcMaxRectangle(histogram [console.ColumnsCount]int, row int) image.Rectangle {
+
+	maxRectangle := image.ZR
+	maxArea := 0
+
+	for i := 0; i < len(histogram); i++ {
+
+		height := histogram[i]
+		if height > maxArea {
+			maxArea = height
+			maxRectangle = image.Rect(i, row, i, row+height)
+		}
+
+		for j := i - 1; j >= 0; j-- {
+			width := i - j + 1
+			height = ui.MinInt(height, histogram[j])
+			if width*height > maxArea {
+				maxArea = width * height
+				maxRectangle = image.Rect(j, row, j+width, row+height)
+			}
+		}
+	}
+
+	return maxRectangle
+}
+
+func createHistogram(grid [console.RowsCount][console.ColumnsCount]int, row int) [console.ColumnsCount]int {
+	histogram := [console.ColumnsCount]int{}
+	for column := 0; column < console.ColumnsCount; column++ {
+		histogram[column] = countEmptyCellsBelow(grid, row, column)
+	}
+	return histogram
+}
+
+func countEmptyCellsBelow(grid [console.RowsCount][console.ColumnsCount]int, row int, column int) int {
+	count := 0
+	for r := row; r < console.RowsCount; r++ {
+		if grid[r][column] == 1 {
+			return count
+		} else {
+			count++
+		}
+	}
+	return count
+}

config/component.go

@@ -34,7 +34,7 @@ func (c *ComponentConfig) GetSize() Size {
 }
 
 func (c *ComponentConfig) GetRectangle() image.Rectangle {
-	if c.Position == nil {
+	if c.Position == nil || len(c.Position) == 0 {
 		return image.ZR
 	} else {
 		return image.Rect(c.Position[0][0], c.Position[0][1], c.Position[0][0]+c.Position[1][0], c.Position[0][1]+c.Position[1][1])