Package com.openhtmltopdf.layout

Class BlockBoxing

java.lang.Object

com.openhtmltopdf.layout.BlockBoxing

public class BlockBoxing
extends java.lang.Object

Utility class for laying block content. It is called when a block box contains block level content. BoxBuilder will have made sure that the block we're working on will either contain only inline or block content. If we're in a paged media environment, the various page break related properties are also handled here. If a rule is violated, the affected run of boxes will be layed out again. If the rule still cannot be satisfied, the rule will be dropped.

IMPORTANT: This is quite hard to get right without causing an explosion of layouts caused by re-attempts to satisfy page-break-inside: avoid in deeply nested content. Please be careful when editing these functions.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	BlockBoxing.AbstractRelayoutDataList
private static class	BlockBoxing.LiteRelayoutDataList

Field Summary

Fields

Modifier and Type	Field	Description
private static int	NO_PAGE_TRIM

Constructor Summary

Constructors

Modifier	Constructor	Description
private	BlockBoxing()

Method Summary

Modifier and Type	Method	Description
static boolean	avoidPageBreakBetween(BlockBox previous, BlockBox current)	If we should try to avoid a page break between two block boxes.
private static LineBox	getFirstLine(Box box)
private static boolean	isPageBreakBetweenChildBoxes(BlockBoxing.AbstractRelayoutDataList relayoutDataList, int runStart, int runEnd, LayoutContext c, BlockBox block)
private static void	layoutBlockChild(LayoutContext c, BlockBox parent, BlockBox child, boolean needPageClear, int childOffset, int trimmedPageCount, LayoutState layoutState)
private static void	layoutBlockChild0(LayoutContext c, BlockBox parent, BlockBox child, boolean needPageClear, int childOffset, int trimmedPageCount)
static void	layoutContent(LayoutContext c, BlockBox block, int contentStart)	Lays out a BlockBox where BlockBox.getChildrenContentType() is BlockBox.ContentType.BLOCK.
private static java.lang.Integer	processPageBreakAvoidRun(LayoutContext c, BlockBox block, java.util.List<Box> localChildren, int offset, BlockBoxing.AbstractRelayoutDataList relayoutDataList, BlockBox childBox)
private static int	relayoutRun(LayoutContext c, java.util.List<Box> localChildren, BlockBox block, BlockBoxing.AbstractRelayoutDataList relayoutDataList, int start, int end, boolean onNewPage)
private static void	repositionBox(LayoutContext c, BlockBox child, int trimmedPageCount)

Methods inherited from class java.lang.Object

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

Field Detail

NO_PAGE_TRIM

private static final int NO_PAGE_TRIM

See Also:

Constant Field Values

Constructor Detail

BlockBoxing

private BlockBoxing()

Method Detail

layoutContent

public static void layoutContent(LayoutContext c,
                                 BlockBox block,
                                 int contentStart)

Lays out a BlockBox where BlockBox.getChildrenContentType() is BlockBox.ContentType.BLOCK.

processPageBreakAvoidRun

private static java.lang.Integer processPageBreakAvoidRun(LayoutContext c,
                                                          BlockBox block,
                                                          java.util.List<Box> localChildren,
                                                          int offset,
                                                          BlockBoxing.AbstractRelayoutDataList relayoutDataList,
                                                          BlockBox childBox)

isPageBreakBetweenChildBoxes

private static boolean isPageBreakBetweenChildBoxes(BlockBoxing.AbstractRelayoutDataList relayoutDataList,
                                                    int runStart,
                                                    int runEnd,
                                                    LayoutContext c,
                                                    BlockBox block)

getFirstLine

private static LineBox getFirstLine(Box box)

relayoutRun

private static int relayoutRun(LayoutContext c,
                               java.util.List<Box> localChildren,
                               BlockBox block,
                               BlockBoxing.AbstractRelayoutDataList relayoutDataList,
                               int start,
                               int end,
                               boolean onNewPage)

layoutBlockChild

private static void layoutBlockChild(LayoutContext c,
                                     BlockBox parent,
                                     BlockBox child,
                                     boolean needPageClear,
                                     int childOffset,
                                     int trimmedPageCount,
                                     LayoutState layoutState)

layoutBlockChild0

private static void layoutBlockChild0(LayoutContext c,
                                      BlockBox parent,
                                      BlockBox child,
                                      boolean needPageClear,
                                      int childOffset,
                                      int trimmedPageCount)

repositionBox

private static void repositionBox(LayoutContext c,
                                  BlockBox child,
                                  int trimmedPageCount)

avoidPageBreakBetween

public static boolean avoidPageBreakBetween(BlockBox previous,
                                            BlockBox current)

If we should try to avoid a page break between two block boxes.