Method Srender

barchart.go:103–416

Srender renders the BarChart as a string.

()

// Srender renders the BarChart as a string.
func (p BarChartPrinter) Srender() (string, error) {
	maxAbsValue := func(value1 int, value2 int) int {
		min := value1
		max := value2

		if value1 > value2 {
			min = value2
			max = value1
		}

		maxAbs := max

		if min < 0 && -min > max { // This is to avoid something like "int(math.Abs(float64(minBarValue)))"
			maxAbs = -min // (--) == (+)
		}

		return maxAbs
	}

	abs := func(value int) int {
		if value < 0 {
			return -value
		}

		return value
	}
	// =================================== VERTICAL BARS RENDERER ======================================================

	type renderParams struct {
		repeatCount             int
		bar                     Bar
		positiveChartPartHeight int
		negativeChartPartHeight int
		positiveChartPartWidth  int
		negativeChartPartWidth  int
		indent                  string
		showValue               bool
		moveUp                  bool
		moveRight               bool
	}

	renderPositiveVerticalBar := func(renderedBarRef *string, rParams renderParams) {
		if rParams.showValue {
			*renderedBarRef += Sprint(rParams.indent + strconv.Itoa(rParams.bar.Value) + rParams.indent + "\n")
		}

		for i := rParams.positiveChartPartHeight; i > 0; i-- {
			if i > rParams.repeatCount {
				*renderedBarRef += rParams.indent + "  " + rParams.indent + " \n"
			} else {
				*renderedBarRef += rParams.indent + rParams.bar.Style.Sprint(p.VerticalBarCharacter) + rParams.indent + " \n"
			}
		}

		// Used when we draw diagram with both POSITIVE and NEGATIVE values.
		// In such case we separately draw top and bottom half of chart.
		// And we need MOVE UP positive part to top part of chart,
		// technically by adding empty pillars with height == height of chart's bottom part.