Class ColumnWidthCalculator

java.lang.Object

dev.jcputney.mjml.util.ColumnWidthCalculator

public final class ColumnWidthCalculator
extends Object

Calculates column pixel widths and responsive width specifications from a list of column nodes and a container width. Shared by MjSection and MjGroup.

Method Summary

Modifier and Type	Method	Description
static double[]	calculatePixelWidths(List<MjmlNode> columns, double containerWidth, boolean usePercentAuto)	Calculates pixel widths for each column.
static String[]	calculateWidthSpecs(List<MjmlNode> columns)	Calculates column width specifications for responsive media queries.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

calculatePixelWidths

public static double[] calculatePixelWidths(List<MjmlNode> columns,
 double containerWidth,
 boolean usePercentAuto)

Calculates pixel widths for each column. Columns with explicit widths get their specified value; auto columns share remaining space equally using percentage-based distribution to match MJML's floating-point behavior.

Parameters:

columns - the column nodes

containerWidth - the available width in pixels

usePercentAuto - if true, auto columns use pct*containerWidth/100 (MJML section behavior); if false, auto columns use (remaining)/count (MJML group behavior)

Returns:

an array of pixel widths corresponding to each column

calculateWidthSpecs

public static String[] calculateWidthSpecs(List<MjmlNode> columns)

Calculates column width specifications for responsive media queries. Returns strings like "100" (percentage), "33.33" (percentage), or "150px" (pixel).

Parameters:

columns - the list of column nodes to calculate width specs for

Returns:

an array of width specification strings for each column