/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.draw2d.text;
import java.util.List;
/**
* The layout manager for {@link InlineFlow} figures.
*
* <P>WARNING: This class is not intended to be subclassed by clients.
* @author hudsonr
* @since 2.1
*/
public class InlineFlowLayout
extends FlowContainerLayout
{
/**
* Creates a new InlineFlowLayout with the given FlowFigure.
* @param flow The FlowFigure
*/
public InlineFlowLayout(FlowFigure flow) {
super(flow);
}
/**
* Adds the given box as a line below the current line.
* @param box the box to add
*/
public void addLine(CompositeBox box) {
endLine();
getContext().addLine(box);
}
/**
* @see FlowContainerLayout#createNewLine()
*/
protected void createNewLine() {
currentLine = new NestedLine((InlineFlow)getFlowFigure());
setupLine(currentLine);
}
/**
* @see FlowContext#endLine()
*/
public void endLine() {
flush();
getContext().endLine();
}
/**
* @see FlowContainerLayout#flush()
*/
protected void flush() {
if (currentLine != null && currentLine.isOccupied()) {
// We want to preserve the state when a linebox is being added
boolean sameLine = getContext().getContinueOnSameLine();
getContext().addToCurrentLine(currentLine);
((InlineFlow)getFlowFigure()).getFragments().add(currentLine);
currentLine = null;
getContext().setContinueOnSameLine(sameLine);
}
}
/**
* InlineFlowLayout gets this information from its context.
* @see FlowContext#getContinueOnSameLine()
*/
public boolean getContinueOnSameLine() {
return getContext().getContinueOnSameLine();
}
/**
* @see FlowContext#getWidthLookahead(FlowFigure, int[])
*/
public void getWidthLookahead(FlowFigure child, int result[]) {
List children = getFlowFigure().getChildren();
int index = -1;
if (child != null)
index = children.indexOf(child);
for (int i = index + 1; i < children.size(); i++)
if (((FlowFigure)children.get(i)).addLeadingWordRequirements(result))
return;
getContext().getWidthLookahead(getFlowFigure(), result);
}
/**
* @see FlowContainerLayout#isCurrentLineOccupied()
*/
public boolean isCurrentLineOccupied() {
return (currentLine != null && !currentLine.getFragments().isEmpty())
|| getContext().isCurrentLineOccupied();
}
/**
* Clears out all fragments prior to the call to layoutChildren().
*/
public void preLayout() {
((InlineFlow)getFlowFigure()).getFragments().clear();
}
/**
* InlineFlow passes this information to its context.
* @see FlowContext#setContinueOnSameLine(boolean)
*/
public void setContinueOnSameLine(boolean value) {
getContext().setContinueOnSameLine(value);
}
/**
* Initializes the given LineBox. Called by createNewLine().
* @param line The LineBox to initialize.
*/
protected void setupLine(LineBox line) {
line.setX(0);
line.setRecommendedWidth(getContext().getRemainingLineWidth());
}
}