jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/css2/layout/CSSInlineFlowLayout.java - jsf/webtools.jsf - Git at Google

 /*******************************************************************************
  * 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.ArrayList;
 import java.util.List;

 import org.eclipse.draw2d.FigureUtilities;
 import org.eclipse.draw2d.geometry.Rectangle;
 import org.eclipse.jst.pagedesigner.css2.ICSSStyle;
 import org.eclipse.jst.pagedesigner.css2.property.ICSSPropertyID;
 import org.eclipse.jst.pagedesigner.css2.style.ITagEditInfo;

 /**
  * The layout manager for {@link CSSFigure}figures. This class is based on
  * InlineFlowLayout of draw2d.
  *
  * @author mengbo
  */
 public class CSSInlineFlowLayout extends CSSLayout {
 	List _fragments = new ArrayList();

 	/**
 	 * Creates a new InlineFlowLayout with the given FlowFigure.
 	 *
 	 * @param flow
 	 *            The FlowFigure
 	 */
 	public CSSInlineFlowLayout(CSSFigure flow) {
 		super(flow);
 	}

 	/**
 	 * Clears out all fragments prior to the call to layoutChildren().
 	 */
 	public void preLayout() {
 		super.preLayout();
 		_fragments.clear();
 		// force creating of the first line. avoid empty element don't have
 		// fragments.
 		// createFirstLine();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.layout.FlowContainerLayout#layoutChildren()
 	 */
 	protected void layoutChildren() {
 		// For designer, to make it to have some size. otherwise can't
 		// be found on screen.
 		// List children = getCSSFigure().getChildren();
 		// if (children.size() == 0)
 		// {
 		// FlowBox box = new FlowBox();
 		// box._height = getCSSStyle().getCSSFont().getFontSize();
 		// box._width = 2;
 		// addToCurrentLine(box);
 		//
 		// }
 		super.layoutChildren();
 	}

 	/**
 	 * Adds the given FlowBox to the current line of this InlineFlowLayout.
 	 *
 	 * @param block
 	 *            the FlowBox to add to the current line
 	 */
 	public void addToCurrentLine(FlowBox block) {
 		getCurrentLine().add(block);
 		// XXX: ???: will currentLine be added multiple times to fragments?
 		// (yang)
 		// _fragments.add(_currentLine);
 	}

 	private void createFirstLine() {
 		_currentLine = new LineBox();
 		setupLine(_currentLine, true);
 		_fragments.add(_currentLine);
 	}

 	/**
 	 * @see FlowContainerLayout#createNewLine()
 	 */
 	protected void createNewLine() {
 		_currentLine = new LineBox();
 		setupLine(_currentLine, false);
 		_fragments.add(_currentLine);
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.layout.FlowContainerLayout#createNewLine(int)
 	 */
 	protected void createNewLine(int topMargin) {
 		// inline flow don't support vertical margin.
 		createNewLine();
 	}

 	/**
 	 * @see FlowContainerLayout#cleanup()
 	 */
 	protected void cleanup() {
 		_currentLine = null;
 	}

 	/**
 	 * @see FlowContainerLayout#flush()
 	 */
 	protected void flush() {
 		if (_fragments.isEmpty()) {
 			createFirstLine();
 		} else if (_fragments.size() == 1) {

 			ICSSStyle style = getCSSStyle();
 			int minWidth = 0, minHeight = 0;
 			// try to see whether there is any designer specified min size
 			ITagEditInfo info = (ITagEditInfo) style
 					.getAdapter(ITagEditInfo.class);
 			if (info != null) {
 				minWidth = info.getMinWidth();
 				minHeight = info.getMinHeight();
 			}
 			FlowBox box = (FlowBox) _fragments.get(0);
 			if (minWidth > box._width) {
 				box._width = minWidth;
 			}
 			if (minHeight > box._height) {
 				box._height = minHeight;
 			}
 		}

 		if (_currentLine != null /* && _currentLine.isOccupied() */) {
 			_currentLine._marginInsets.right = getCSSStyle().getMarginInsets().right;
 			getFlowContext().addToCurrentLine(_currentLine);
 		}

 	}

 	/**
 	 * @see FlowContext#endLine()
 	 */
 	public void endLine() {
 		if (_currentLine == null) {
 			getFlowContext().endLine();
 			return;
 		}
 		// If nothing was ever placed in the line, ignore it. and if the line is
 		// the first line, just remove it.
 		if (_currentLine.isOccupied()) {
 			getFlowContext().addToCurrentLine(_currentLine);
 		} else if (_fragments.size() == 1) {
 			_fragments.remove(0);
 		}
 		getFlowContext().endLine();
 		_currentLine = null;
 	}

 	/**
 	 * @see org.eclipse.jst.pagedesigner.css2.layout.FlowContext#getCurrentY()
 	 */
 	public int getCurrentY() {
 		return getCurrentLine()._y;
 	}

 	/**
 	 * @see org.eclipse.jst.pagedesigner.css2.layout.FlowContainerLayout#isCurrentLineOccupied()
 	 */
 	public boolean isCurrentLineOccupied() {
 		if (_currentLine == null) {
 			return getFlowContext().isCurrentLineOccupied();
 		} else if (_currentLine.getFragments().isEmpty()) {
 			return getFlowContext().isCurrentLineOccupied();
 		} else {
 			return true;
 		}
 	}

 	/**
 	 * Initializes the given LineBox. Called by createNewLine().
 	 *
 	 * @param line
 	 *            The LineBox to initialize.
 	 */
 	protected void setupLine(LineBox line, boolean firstline) {
 		LineBox parent = getFlowContext().getCurrentLine();
 		line._x = 0;
 		line._y = getFlowContext().getCurrentY();

 		line.setRecommendedWidth(parent.getAvailableWidth());

 		setLineVerticalAlign(line);
 		setFontinfoForLine(line);

 		if (firstline && getCSSStyle() != null) {
 			ICSSStyle style = getCSSStyle();
 			int minWidth = 0, minHeight = 0;
 			// try to see whether there is any designer specified min size
 			ITagEditInfo info = (ITagEditInfo) style
 					.getAdapter(ITagEditInfo.class);
 			if (info != null) {
 				minWidth = info.getMinWidth();
 				minHeight = info.getMinHeight();
 			}

 			// // CSS also has the min-width/min-height property. We should also
 			// get that,
 			// // and using the max of the "min-width" css property and the
 			// designer specified min size.
 			// int height =
 			// getLengthValue(style,ICSSPropertyID.ATTR_MIN_HEIGHT);
 			// if(height > minHeight)
 			// {
 			// minHeight = height;
 			// }
 			// int width = getLengthValue(style,ICSSPropertyID.ATTR_MIN_WIDTH);
 			// if(width > minWidth)
 			// {
 			// minWidth = width;
 			// }
 			if (minWidth > 0) {
 				line.setWidth(minWidth);
 			}
 			int fontHeight = this.getCSSStyle().getCSSFont().getXHeight();
 			if (minHeight > 0 && minHeight > fontHeight) {
 				line.setHeight(minHeight);
 			} else {
 				line.setHeight(fontHeight);
 			}
 		}
 	}

 	private void setLineVerticalAlign(LineBox box) {
 		ICSSStyle style = getCSSStyle();
 		if (style != null) {
 			box.setVerticalAlignData(style
 					.getStyleProperty(ICSSPropertyID.ATTR_VERTICAL_ALIGN));
 		}
 	}

 	private void setFontinfoForLine(LineBox line) {

 		ICSSStyle style = getCSSStyle();
 		if (style != null) {
 			line.setFontMetrics(FigureUtilities.getFontMetrics(style
 					.getCSSFont().getSwtFont()));
 		}
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.layout.FlowFigureLayout#dispose()
 	 */
 	public void dispose() {
 		//

 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.layout.ICSSLayout#getFragmentsForRead()
 	 */
 	public List getFragmentsForRead() {
 		return _fragments;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.layout.ICSSLayout#postValidate()
 	 */
 	public void postValidate() {
 		List list = _fragments;

 		FlowBox box;
 		int left = Integer.MAX_VALUE, top = left;
 		int right = Integer.MIN_VALUE, bottom = right;
 		for (int i = 0; i < list.size(); i++) {
 			box = (FlowBox) list.get(i);
 			// if (box instanceof LineBox && !((LineBox) box).isOccupied())
 			// {
 			// continue; // skip unoccupied line
 			// }
 			left = Math.min(left, box._x);
 			right = Math.max(right, box._x + box._width);
 			top = Math.min(top, box._y);
 			bottom = Math.max(bottom, box._y + box._height);
 		}
 		getCSSFigure().setBounds(
 				new Rectangle(left, top, right - left, bottom - top));
 		list = getCSSFigure().getChildren();
 		for (int i = 0; i < list.size(); i++) {
 			((FlowFigure) list.get(i)).postValidate();
 		}
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.jst.pagedesigner.css2.layout.FlowContext#getContainerWidth()
 	 */
 	public int getContainerWidth() {
 		// FIXME: don't really understand what means for inline
 		return this.getFlowContext().getContainerWidth();
 	}
 }
	/*******************************************************************************
	* 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.ArrayList;
	import java.util.List;

	import org.eclipse.draw2d.FigureUtilities;
	import org.eclipse.draw2d.geometry.Rectangle;
	import org.eclipse.jst.pagedesigner.css2.ICSSStyle;
	import org.eclipse.jst.pagedesigner.css2.property.ICSSPropertyID;
	import org.eclipse.jst.pagedesigner.css2.style.ITagEditInfo;

	/**
	* The layout manager for {@link CSSFigure}figures. This class is based on
	* InlineFlowLayout of draw2d.
	*
	* @author mengbo
	*/
	public class CSSInlineFlowLayout extends CSSLayout {
	List _fragments = new ArrayList();

	/**
	* Creates a new InlineFlowLayout with the given FlowFigure.
	*
	* @param flow
	* The FlowFigure
	*/
	public CSSInlineFlowLayout(CSSFigure flow) {
	super(flow);
	}

	/**
	* Clears out all fragments prior to the call to layoutChildren().
	*/
	public void preLayout() {
	super.preLayout();
	_fragments.clear();
	// force creating of the first line. avoid empty element don't have
	// fragments.
	// createFirstLine();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.layout.FlowContainerLayout#layoutChildren()
	*/
	protected void layoutChildren() {
	// For designer, to make it to have some size. otherwise can't
	// be found on screen.
	// List children = getCSSFigure().getChildren();
	// if (children.size() == 0)
	// {
	// FlowBox box = new FlowBox();
	// box._height = getCSSStyle().getCSSFont().getFontSize();
	// box._width = 2;
	// addToCurrentLine(box);
	//
	// }
	super.layoutChildren();
	}

	/**
	* Adds the given FlowBox to the current line of this InlineFlowLayout.
	*
	* @param block
	* the FlowBox to add to the current line
	*/
	public void addToCurrentLine(FlowBox block) {
	getCurrentLine().add(block);
	// XXX: ???: will currentLine be added multiple times to fragments?
	// (yang)
	// _fragments.add(_currentLine);
	}

	private void createFirstLine() {
	_currentLine = new LineBox();
	setupLine(_currentLine, true);
	_fragments.add(_currentLine);
	}

	/**
	* @see FlowContainerLayout#createNewLine()
	*/
	protected void createNewLine() {
	_currentLine = new LineBox();
	setupLine(_currentLine, false);
	_fragments.add(_currentLine);
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.layout.FlowContainerLayout#createNewLine(int)
	*/
	protected void createNewLine(int topMargin) {
	// inline flow don't support vertical margin.
	createNewLine();
	}

	/**
	* @see FlowContainerLayout#cleanup()
	*/
	protected void cleanup() {
	_currentLine = null;
	}

	/**
	* @see FlowContainerLayout#flush()
	*/
	protected void flush() {
	if (_fragments.isEmpty()) {
	createFirstLine();
	} else if (_fragments.size() == 1) {

	ICSSStyle style = getCSSStyle();
	int minWidth = 0, minHeight = 0;
	// try to see whether there is any designer specified min size
	ITagEditInfo info = (ITagEditInfo) style
	.getAdapter(ITagEditInfo.class);
	if (info != null) {
	minWidth = info.getMinWidth();
	minHeight = info.getMinHeight();
	}
	FlowBox box = (FlowBox) _fragments.get(0);
	if (minWidth > box._width) {
	box._width = minWidth;
	}
	if (minHeight > box._height) {
	box._height = minHeight;
	}
	}

	if (_currentLine != null /* && _currentLine.isOccupied() */) {
	_currentLine._marginInsets.right = getCSSStyle().getMarginInsets().right;
	getFlowContext().addToCurrentLine(_currentLine);
	}

	}

	/**
	* @see FlowContext#endLine()
	*/
	public void endLine() {
	if (_currentLine == null) {
	getFlowContext().endLine();
	return;
	}
	// If nothing was ever placed in the line, ignore it. and if the line is
	// the first line, just remove it.
	if (_currentLine.isOccupied()) {
	getFlowContext().addToCurrentLine(_currentLine);
	} else if (_fragments.size() == 1) {
	_fragments.remove(0);
	}
	getFlowContext().endLine();
	_currentLine = null;
	}

	/**
	* @see org.eclipse.jst.pagedesigner.css2.layout.FlowContext#getCurrentY()
	*/
	public int getCurrentY() {
	return getCurrentLine()._y;
	}

	/**
	* @see org.eclipse.jst.pagedesigner.css2.layout.FlowContainerLayout#isCurrentLineOccupied()
	*/
	public boolean isCurrentLineOccupied() {
	if (_currentLine == null) {
	return getFlowContext().isCurrentLineOccupied();
	} else if (_currentLine.getFragments().isEmpty()) {
	return getFlowContext().isCurrentLineOccupied();
	} else {
	return true;
	}
	}

	/**
	* Initializes the given LineBox. Called by createNewLine().
	*
	* @param line
	* The LineBox to initialize.
	*/
	protected void setupLine(LineBox line, boolean firstline) {
	LineBox parent = getFlowContext().getCurrentLine();
	line._x = 0;
	line._y = getFlowContext().getCurrentY();

	line.setRecommendedWidth(parent.getAvailableWidth());

	setLineVerticalAlign(line);
	setFontinfoForLine(line);

	if (firstline && getCSSStyle() != null) {
	ICSSStyle style = getCSSStyle();
	int minWidth = 0, minHeight = 0;
	// try to see whether there is any designer specified min size
	ITagEditInfo info = (ITagEditInfo) style
	.getAdapter(ITagEditInfo.class);
	if (info != null) {
	minWidth = info.getMinWidth();
	minHeight = info.getMinHeight();
	}

	// // CSS also has the min-width/min-height property. We should also
	// get that,
	// // and using the max of the "min-width" css property and the
	// designer specified min size.
	// int height =
	// getLengthValue(style,ICSSPropertyID.ATTR_MIN_HEIGHT);
	// if(height > minHeight)
	// {
	// minHeight = height;
	// }
	// int width = getLengthValue(style,ICSSPropertyID.ATTR_MIN_WIDTH);
	// if(width > minWidth)
	// {
	// minWidth = width;
	// }
	if (minWidth > 0) {
	line.setWidth(minWidth);
	}
	int fontHeight = this.getCSSStyle().getCSSFont().getXHeight();
	if (minHeight > 0 && minHeight > fontHeight) {
	line.setHeight(minHeight);
	} else {
	line.setHeight(fontHeight);
	}
	}
	}

	private void setLineVerticalAlign(LineBox box) {
	ICSSStyle style = getCSSStyle();
	if (style != null) {
	box.setVerticalAlignData(style
	.getStyleProperty(ICSSPropertyID.ATTR_VERTICAL_ALIGN));
	}
	}

	private void setFontinfoForLine(LineBox line) {

	ICSSStyle style = getCSSStyle();
	if (style != null) {
	line.setFontMetrics(FigureUtilities.getFontMetrics(style
	.getCSSFont().getSwtFont()));
	}
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.layout.FlowFigureLayout#dispose()
	*/
	public void dispose() {
	//

	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.layout.ICSSLayout#getFragmentsForRead()
	*/
	public List getFragmentsForRead() {
	return _fragments;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.layout.ICSSLayout#postValidate()
	*/
	public void postValidate() {
	List list = _fragments;

	FlowBox box;
	int left = Integer.MAX_VALUE, top = left;
	int right = Integer.MIN_VALUE, bottom = right;
	for (int i = 0; i < list.size(); i++) {
	box = (FlowBox) list.get(i);
	// if (box instanceof LineBox && !((LineBox) box).isOccupied())
	// {
	// continue; // skip unoccupied line
	// }
	left = Math.min(left, box._x);
	right = Math.max(right, box._x + box._width);
	top = Math.min(top, box._y);
	bottom = Math.max(bottom, box._y + box._height);
	}
	getCSSFigure().setBounds(
	new Rectangle(left, top, right - left, bottom - top));
	list = getCSSFigure().getChildren();
	for (int i = 0; i < list.size(); i++) {
	((FlowFigure) list.get(i)).postValidate();
	}
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.jst.pagedesigner.css2.layout.FlowContext#getContainerWidth()
	*/
	public int getContainerWidth() {
	// FIXME: don't really understand what means for inline
	return this.getFlowContext().getContainerWidth();
	}
	}