Package com.itextpdf.layout.margincollapse

Class MarginsCollapseHandler

  • public class MarginsCollapseHandler
extends java.lang.Object
    Rules of the margins collapsing are taken from Mozilla Developer Network: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Box_Model/Mastering_margin_collapsing See also: https://www.w3.org/TR/CSS2/box.html#collapsing-margins

    • Field Detail

      • firstNotEmptyKidIndex

        private int firstNotEmptyKidIndex

      • processedChildrenNum

        private int processedChildrenNum

      • rendererChildren

        private java.util.List<IRenderer> rendererChildren

      • backupLayoutBox

        private Rectangle backupLayoutBox

      • lastKidCollapsedAfterHasClearanceApplied

        private boolean lastKidCollapsedAfterHasClearanceApplied

    • Method Detail

      • processFixedHeightAdjustment

        public void processFixedHeightAdjustment​(float heightDelta)

      • applyClearance

        public void applyClearance​(float clearHeightCorrection)

      • createMarginsInfoForBlockChild

        private MarginsCollapseInfo createMarginsInfoForBlockChild​(int childIndex)

      • endChildMarginsHandling

        public void endChildMarginsHandling​(Rectangle layoutBox)
        This method shall be called after child occupied area is included into parent occupied area.
        Parameters:
        layoutBox - available area for child and its siblings layout. It might be adjusted inside the method

      • startMarginsCollapse

        public void startMarginsCollapse​(Rectangle parentBBox)

      • endMarginsCollapse

        public void endMarginsCollapse​(Rectangle layoutBox)

      • updateCollapseBeforeIfPrevKidIsFirstAndSelfCollapsed

        private void updateCollapseBeforeIfPrevKidIsFirstAndSelfCollapsed​(MarginsCollapse collapseAfter)

      • prepareBoxForLayoutAttempt

        private void prepareBoxForLayoutAttempt​(Rectangle layoutBox,
                                        int childIndex,
                                        boolean childIsBlockElement)

      • restoreLayoutBoxAfterFailedLayoutAttempt

        private void restoreLayoutBoxAfterFailedLayoutAttempt​(Rectangle layoutBox)

      • applyTopMargin

        private void applyTopMargin​(Rectangle box,
                            float topIndent)

      • applyBottomMargin

        private void applyBottomMargin​(Rectangle box,
                               float bottomIndent)

      • processUsedChildBufferSpaceOnTop

        private void processUsedChildBufferSpaceOnTop​(Rectangle layoutBox)

      • subtractUsedTopBufferFromBottomBuffer

        private void subtractUsedTopBufferFromBottomBuffer​(float usedTopBuffer)

      • fixPrevChildOccupiedArea

        private void fixPrevChildOccupiedArea​(int childIndex)

      • addNotYetAppliedTopMargin

        private void addNotYetAppliedTopMargin​(Rectangle layoutBox)

      • applySelfCollapsedKidMarginWithClearance

        private void applySelfCollapsedKidMarginWithClearance​(Rectangle layoutBox)

      • getRendererChild

        private IRenderer getRendererChild​(int index)

      • removeRendererChild

        private IRenderer removeRendererChild​(int index)

      • getRidOfCollapseArtifactsAtopOccupiedArea

        private void getRidOfCollapseArtifactsAtopOccupiedArea()

      • marginsCouldBeSelfCollapsing

        private static boolean marginsCouldBeSelfCollapsing​(IRenderer renderer)

      • firstChildMarginAdjoinedToParent

        private static boolean firstChildMarginAdjoinedToParent​(IRenderer parent)

      • lastChildMarginAdjoinedToParent

        private static boolean lastChildMarginAdjoinedToParent​(IRenderer parent)

      • isBlockElement

        private static boolean isBlockElement​(IRenderer renderer)

      • hasHeightProp

        private static boolean hasHeightProp​(IRenderer renderer)

      • hasPositiveHeight

        private static boolean hasPositiveHeight​(IRenderer renderer)

      • hasTopPadding

        private static boolean hasTopPadding​(IRenderer renderer)

      • hasBottomPadding

        private static boolean hasBottomPadding​(IRenderer renderer)

      • hasTopBorders

        private static boolean hasTopBorders​(IRenderer renderer)

      • hasBottomBorders

        private static boolean hasBottomBorders​(IRenderer renderer)

      • rendererIsFloated

        private static boolean rendererIsFloated​(IRenderer renderer)

      • defineTopMarginValueForCollapse

        private static float defineTopMarginValueForCollapse​(IRenderer renderer)

      • ignoreModelTopMargin

        private static void ignoreModelTopMargin​(IRenderer renderer)

      • overrideModelTopMargin

        private static void overrideModelTopMargin​(IRenderer renderer,
                                           float collapsedMargins)

      • defineBottomMarginValueForCollapse

        private static float defineBottomMarginValueForCollapse​(IRenderer renderer)

      • ignoreModelBottomMargin

        private static void ignoreModelBottomMargin​(IRenderer renderer)

      • overrideModelBottomMargin

        private static void overrideModelBottomMargin​(IRenderer renderer,
                                              float collapsedMargins)

      • defineMarginValueForCollapse

        private static float defineMarginValueForCollapse​(IRenderer renderer,
                                                  int property)

      • overrideModelMargin

        private static void overrideModelMargin​(IRenderer renderer,
                                        int property,
                                        float collapsedMargins)

      • hasPadding

        private static boolean hasPadding​(IRenderer renderer,
                                  int property)