/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.css2.layout;
import java.util.List;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
/**
* This layout if for those thigns that it's parent will decide its size. Such
* as table cell.
*
* @author mengbo
* @version 1.5
*/
public class CSSPageFlowLayout extends CSSBlockFlowLayout {
private Dimension _pageSize = new Dimension();
private int _recommendedWidth;
private int _pageSizeCacheKeys[] = new int[4];
private Dimension _pageSizeCacheValues[] = new Dimension[4];
/**
* @param cssfigure
*/
public CSSPageFlowLayout(CSSFigure cssfigure) {
super(cssfigure);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.css2.layout.FlowFigureLayout#invalidate()
*/
public void invalidate() {
super.invalidate();
_pageSizeCacheKeys = new int[4];
_pageSizeCacheValues = new Dimension[4];
_pageSize = new Dimension();
_recommendedWidth = 0;
}
protected void endBlock() {
layoutLines();
}
/**
* TODO: This method is not being called.
*/
public void postValidate() {
Rectangle r = new Rectangle(_blockBox._x, _blockBox._y, _blockBox
.getWidth(), _blockBox.getHeight());
r = r.expand(getCSSFigure().getInsets());
_pageSize.width = r.width;
_pageSize.height = r.height;
List list = getCSSFigure().getChildren();
for (int i = 0; i < list.size(); i++) {
((FlowFigure) list.get(i)).postValidate();
}
}
/**
* Setup blockBox to the initial bounds of the Page
*/
protected void setupBlock() {
// Remove all current Fragments
_blockBox.clear();
// Setup the one fragment for this Block with the correct X and
// available width
int recommendedWidth = getRecommendedWidth();
_blockBox.setRecommendedWidth(recommendedWidth);
if (recommendedWidth > 0 && recommendedWidth != Integer.MAX_VALUE) {
_blockBox.setWidth(recommendedWidth);
}
_blockBox._x = 0;
}
private int getRecommendedWidth() {
return _recommendedWidth;
}
private void setRecommendedWidth(int width) {
if (_recommendedWidth == width) {
return;
}
_recommendedWidth = width;
getCSSFigure().invalidate2();
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jst.pagedesigner.css2.layout.CSSLayout#setBoundsCalled(org.eclipse.jst.pagedesigner.css2.layout.CSSFigure,
* org.eclipse.draw2d.geometry.Rectangle, boolean)
*/
public void setBoundsCalled(Rectangle r, boolean invalidate) {
super.setBoundsCalled(r, invalidate);
CSSFigure figure = getCSSFigure();
int newWidth = r.width - figure.getInsets().getWidth();
if (invalidate || getRecommendedWidth() != newWidth) {
setRecommendedWidth(newWidth);
figure.getUpdateManager().addInvalidFigure(figure);
}
}
/**
* @see org.eclipse.draw2d.Figure#getPreferredSize(int, int)
*/
public Dimension getPreferredSize(IFigure container, int width, int h) {
if (width >= 0) {
width = Math.max(0, width - container.getInsets().getWidth());
}
for (int i = 0; i < 4; i++) {
if (_pageSizeCacheKeys[i] == width
&& _pageSizeCacheValues[i] != null) {
return _pageSizeCacheValues[i];
}
}
_pageSizeCacheKeys[3] = _pageSizeCacheKeys[2];
_pageSizeCacheKeys[2] = _pageSizeCacheKeys[1];
_pageSizeCacheKeys[1] = _pageSizeCacheKeys[0];
_pageSizeCacheKeys[0] = width;
_pageSizeCacheValues[3] = _pageSizeCacheValues[2];
_pageSizeCacheValues[2] = _pageSizeCacheValues[1];
_pageSizeCacheValues[1] = _pageSizeCacheValues[0];
// Flowpage must temporarily layout to determine its preferred size
int oldWidth = getRecommendedWidth();
setRecommendedWidth(width);
container.validate();
_pageSizeCacheValues[0] = _pageSize.getExpanded(container.getInsets()
.getWidth(), container.getInsets().getHeight());
if (width != oldWidth) {
setRecommendedWidth(oldWidth);
container.getUpdateManager().addInvalidFigure(container);
}
return _pageSizeCacheValues[0];
}
}