Package org.opencms.ade.editprovider.client

Class CmsEditablePositionCalculator

java.lang.Object

org.opencms.ade.editprovider.client.CmsEditablePositionCalculator

public class CmsEditablePositionCalculator
extends Object

This class is used to calculate positions for a set of direct edit buttons so that they don't overlap.

Since:

8.0.0

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	CmsEditablePositionCalculator.LeftComparator	A comparator class which compares position beans by their left edge.

Constructor Summary

Constructors

Constructor	Description
CmsEditablePositionCalculator(Map<String,CmsPositionBean> positions)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
Map<String,CmsPositionBean>	calculatePositions()	Calculates non-overlapping positions for the button bars and returns them in a map with the element ids as keys.
protected boolean	checkCollision()	Checks whether a collision occurs and handle it if necessary.
protected void	handleCollision(CmsPositionBean p1, CmsPositionBean p2)	Handles a collision by moving the lower position down.
protected boolean	intersectIntervals(int a1, int a2, int b1, int b2)	Checks for intersection of two one-dimensional intervals.
protected boolean	intersectsHorizontally(CmsPositionBean p1, CmsPositionBean p2)	Checks whether two positions intersect horizontally.
protected boolean	intersectsVertically(CmsPositionBean p1, CmsPositionBean p2)	Checks whether two positions intersect vertically.
protected void	sortByLeft()	Sorts the internal list of positions by their left edge.

Methods inherited from class java.lang.Object

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

Constructor Details

CmsEditablePositionCalculator

public CmsEditablePositionCalculator(Map<String,CmsPositionBean> positions)

Creates a new instance.

Parameters:

positions - the map of original positions by element id (will not be altered)

Method Details

calculatePositions

public Map<String,CmsPositionBean> calculatePositions()

Calculates non-overlapping positions for the button bars and returns them in a map with the element ids as keys.

Returns:

the map of non-overlapping positions

checkCollision

protected boolean checkCollision()

Checks whether a collision occurs and handle it if necessary.

Returns:

true if a collision occured

handleCollision

protected void handleCollision(CmsPositionBean p1,
 CmsPositionBean p2)

Handles a collision by moving the lower position down.

Parameters:

p1 - the first position

p2 - the second position

intersectIntervals

protected boolean intersectIntervals(int a1,
 int a2,
 int b1,
 int b2)

Checks for intersection of two one-dimensional intervals.

Parameters:

a1 - the left edge of the first interval

a2 - the right edge of the first interval

b1 - the left edge of the second interval

b2 - the right edge of the second interval

Returns:

true if the intervals intersect

intersectsHorizontally

protected boolean intersectsHorizontally(CmsPositionBean p1,
 CmsPositionBean p2)

Checks whether two positions intersect horizontally.

Parameters:

p1 - the first position

p2 - the second position

Returns:

true if the positions intersect horizontally

intersectsVertically

protected boolean intersectsVertically(CmsPositionBean p1,
 CmsPositionBean p2)

Checks whether two positions intersect vertically.

Parameters:

p1 - the first position

p2 - the second position

Returns:

if the positions intersect vertically

sortByLeft

protected void sortByLeft()

Sorts the internal list of positions by their left edge.