Class FlexUtil

java.lang.Object

com.itextpdf.layout.renderer.FlexUtil

final class FlexUtil
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	FlexUtil.FlexItemCalculationInfo

Field Summary

Fields

Modifier and Type	Field	Description
private static final float	EPSILON
private static final float	FLEX_GROW_INITIAL_VALUE
private static final float	FLEX_SHRINK_INITIAL_VALUE
private static final org.slf4j.Logger	logger

Constructor Summary

Constructors

Modifier	Constructor	Description
private	FlexUtil()

Method Summary

Modifier and Type	Method	Description
private static void	applyAlignContent(List<List<FlexUtil.FlexItemCalculationInfo>> lines, AlignContentPropertyValue alignContent, float freeSpace, boolean isColumnDirection)
private static void	applyAlignContent(List<List<FlexUtil.FlexItemCalculationInfo>> lines, FlexContainerRenderer renderer, Float crossSize, Rectangle layoutBox)
private static void	applyAlignItemsAndAlignSelf(List<List<FlexUtil.FlexItemCalculationInfo>> lines, FlexContainerRenderer renderer, List<Float> lineCrossSizes)
private static void	applyCentralAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines, float freeSpace, boolean isColumnDirection)
private static void	applyFlexEndAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines, float freeSpace, boolean isColumnDirection)
private static void	applyJustifyContent(List<List<FlexUtil.FlexItemCalculationInfo>> lines, FlexContainerRenderer renderer, float mainSize, float containerMainSize)
private static void	applySpaceAroundAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines, float freeSpace, boolean isColumnDirection)
private static void	applySpaceBetweenAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines, float freeSpace, boolean isColumnDirection)
private static void	applySpaceEvenlyAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines, float freeSpace, boolean isColumnDirection)
static List<List<FlexItemInfo>>	calculateChildrenRectangles(Rectangle flexContainerBBox, FlexContainerRenderer flexContainerRenderer)	Performs flex layout algorithm.
(package private) static List<Float>	calculateColumnDirectionCrossSizes(List<List<FlexItemInfo>> lines)
(package private) static List<Float>	calculateCrossSizeOfEachFlexLine(List<List<FlexUtil.FlexItemCalculationInfo>> lines, Float minCrossSize, Float crossSize, Float maxCrossSize)
private static float	calculateFreeSpace(List<FlexUtil.FlexItemCalculationInfo> line, float initialFreeSpace)
private static float	calculateHeight(AbstractRenderer flexItemRenderer, float width)
private static float	calculateMaxMainSize(AbstractRenderer flexItemRenderer, float flexContainerMainSize, boolean isColumnDirection, float crossSize)
(package private) static List<List<FlexUtil.FlexItemCalculationInfo>>	collectFlexItemsIntoFlexLines(List<FlexUtil.FlexItemCalculationInfo> flexItemCalculationInfos, float mainSize, boolean isSingleLine)
private static List<FlexUtil.FlexItemCalculationInfo>	createFlexItemCalculationInfos(FlexContainerRenderer flexContainerRenderer, float flexContainerMainSize, float crossSize)
(package private) static void	determineFlexBasisAndHypotheticalMainSizeForFlexItems(List<FlexUtil.FlexItemCalculationInfo> flexItemCalculationInfos, float crossSize, boolean isColumnDirection)
private static void	determineHypotheticalCrossSizeForFlexItem(FlexUtil.FlexItemCalculationInfo info, boolean isColumnDirection, float crossSize)
(package private) static void	determineHypotheticalCrossSizeForFlexItems(List<List<FlexUtil.FlexItemCalculationInfo>> lines, boolean isColumnDirection, float crossSize)
(package private) static void	determineUsedCrossSizeOfEachFlexItem(List<List<FlexUtil.FlexItemCalculationInfo>> lines, List<Float> lineCrossSizes, FlexContainerRenderer flexContainerRenderer)
private static Float[]	getCrossSizes(FlexContainerRenderer renderer, Rectangle layoutBox)
private static float	getItemMaxCrossSize(List<FlexUtil.FlexItemCalculationInfo> line)
(package private) static float	getMainSize(FlexContainerRenderer renderer, Rectangle layoutBox)
(package private) static void	handleAlignContentStretch(FlexContainerRenderer flexContainerRenderer, List<List<FlexUtil.FlexItemCalculationInfo>> lines, Float crossSize, List<Float> lineCrossSizes, Rectangle layoutBox)
private static boolean	hasFlexibleItems(List<FlexUtil.FlexItemCalculationInfo> line)
(package private) static boolean	isColumnDirection(FlexContainerRenderer renderer)
(package private) static boolean	isZero(float value)
(package private) static void	resolveFlexibleLengths(List<List<FlexUtil.FlexItemCalculationInfo>> lines, float mainSize)
private static void	resolveFlexibleLengths(List<List<FlexUtil.FlexItemCalculationInfo>> lines, float layoutBoxSize, float containerSize)
private static Float	resolveUnitValue(FlexContainerRenderer renderer, int property, float baseValue)
private static List<Float>	retrieveCurrentPageLineCrossSizes(FlexContainerRenderer flexContainerRenderer, List<List<FlexUtil.FlexItemCalculationInfo>> lines, List<Float> lineCrossSizes, Float crossSize, Rectangle layoutBox)
private static Float	retrieveMaxHeightForMainDirection(AbstractRenderer renderer)
private static Float	retrieveMinHeightForMainDirection(AbstractRenderer renderer)

Methods inherited from class Object

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

Field Details

EPSILON

private static final float EPSILON

See Also:

• Constant Field Values

FLEX_GROW_INITIAL_VALUE

private static final float FLEX_GROW_INITIAL_VALUE

See Also:

• Constant Field Values

FLEX_SHRINK_INITIAL_VALUE

private static final float FLEX_SHRINK_INITIAL_VALUE

See Also:

• Constant Field Values

logger

private static final org.slf4j.Logger logger

Constructor Details

FlexUtil

private FlexUtil()

Method Details

calculateChildrenRectangles

public static List<List<FlexItemInfo>> calculateChildrenRectangles(Rectangle flexContainerBBox,
 FlexContainerRenderer flexContainerRenderer)

Performs flex layout algorithm.

The algorithm could be found here:

Parameters:

flexContainerBBox - bounding box in which flex container should be rendered

flexContainerRenderer - flex container's renderer

Returns:

list of lines

applyAlignContent

private static void applyAlignContent(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 FlexContainerRenderer renderer,
 Float crossSize,
 Rectangle layoutBox)

applyAlignContent

private static void applyAlignContent(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 AlignContentPropertyValue alignContent,
 float freeSpace,
 boolean isColumnDirection)

applyFlexEndAlignment

private static void applyFlexEndAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 float freeSpace,
 boolean isColumnDirection)

applySpaceBetweenAlignment

private static void applySpaceBetweenAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 float freeSpace,
 boolean isColumnDirection)

applySpaceEvenlyAlignment

private static void applySpaceEvenlyAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 float freeSpace,
 boolean isColumnDirection)

applySpaceAroundAlignment

private static void applySpaceAroundAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 float freeSpace,
 boolean isColumnDirection)

applyCentralAlignment

private static void applyCentralAlignment(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 float freeSpace,
 boolean isColumnDirection)

getItemMaxCrossSize

private static float getItemMaxCrossSize(List<FlexUtil.FlexItemCalculationInfo> line)

isColumnDirection

static boolean isColumnDirection(FlexContainerRenderer renderer)

getMainSize

static float getMainSize(FlexContainerRenderer renderer,
 Rectangle layoutBox)

resolveUnitValue

private static Float resolveUnitValue(FlexContainerRenderer renderer,
 int property,
 float baseValue)

getCrossSizes

private static Float[] getCrossSizes(FlexContainerRenderer renderer,
 Rectangle layoutBox)

determineFlexBasisAndHypotheticalMainSizeForFlexItems

static void determineFlexBasisAndHypotheticalMainSizeForFlexItems(List<FlexUtil.FlexItemCalculationInfo> flexItemCalculationInfos,
 float crossSize,
 boolean isColumnDirection)

collectFlexItemsIntoFlexLines

static List<List<FlexUtil.FlexItemCalculationInfo>> collectFlexItemsIntoFlexLines(List<FlexUtil.FlexItemCalculationInfo> flexItemCalculationInfos,
 float mainSize,
 boolean isSingleLine)

resolveFlexibleLengths

static void resolveFlexibleLengths(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 float mainSize)

resolveFlexibleLengths

private static void resolveFlexibleLengths(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 float layoutBoxSize,
 float containerSize)

determineHypotheticalCrossSizeForFlexItems

static void determineHypotheticalCrossSizeForFlexItems(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 boolean isColumnDirection,
 float crossSize)

determineHypotheticalCrossSizeForFlexItem

private static void determineHypotheticalCrossSizeForFlexItem(FlexUtil.FlexItemCalculationInfo info,
 boolean isColumnDirection,
 float crossSize)

calculateColumnDirectionCrossSizes

static List<Float> calculateColumnDirectionCrossSizes(List<List<FlexItemInfo>> lines)

calculateCrossSizeOfEachFlexLine

static List<Float> calculateCrossSizeOfEachFlexLine(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 Float minCrossSize,
 Float crossSize,
 Float maxCrossSize)

handleAlignContentStretch

static void handleAlignContentStretch(FlexContainerRenderer flexContainerRenderer,
 List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 Float crossSize,
 List<Float> lineCrossSizes,
 Rectangle layoutBox)

determineUsedCrossSizeOfEachFlexItem

static void determineUsedCrossSizeOfEachFlexItem(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 List<Float> lineCrossSizes,
 FlexContainerRenderer flexContainerRenderer)

retrieveMaxHeightForMainDirection

private static Float retrieveMaxHeightForMainDirection(AbstractRenderer renderer)

retrieveMinHeightForMainDirection

private static Float retrieveMinHeightForMainDirection(AbstractRenderer renderer)

applyAlignItemsAndAlignSelf

private static void applyAlignItemsAndAlignSelf(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 FlexContainerRenderer renderer,
 List<Float> lineCrossSizes)

applyJustifyContent

private static void applyJustifyContent(List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 FlexContainerRenderer renderer,
 float mainSize,
 float containerMainSize)

calculateFreeSpace

private static float calculateFreeSpace(List<FlexUtil.FlexItemCalculationInfo> line,
 float initialFreeSpace)

hasFlexibleItems

private static boolean hasFlexibleItems(List<FlexUtil.FlexItemCalculationInfo> line)

isZero

static boolean isZero(float value)

createFlexItemCalculationInfos

private static List<FlexUtil.FlexItemCalculationInfo> createFlexItemCalculationInfos(FlexContainerRenderer flexContainerRenderer,
 float flexContainerMainSize,
 float crossSize)

calculateMaxMainSize

private static float calculateMaxMainSize(AbstractRenderer flexItemRenderer,
 float flexContainerMainSize,
 boolean isColumnDirection,
 float crossSize)

retrieveCurrentPageLineCrossSizes

private static List<Float> retrieveCurrentPageLineCrossSizes(FlexContainerRenderer flexContainerRenderer,
 List<List<FlexUtil.FlexItemCalculationInfo>> lines,
 List<Float> lineCrossSizes,
 Float crossSize,
 Rectangle layoutBox)

calculateHeight

private static float calculateHeight(AbstractRenderer flexItemRenderer,
 float width)