org.wings.plaf.css.PaddingVoodoo Maven / Gradle / Ivy
// (c) copyright 2006 by eXXcellent solutions, Ulm. Author: bschmid
package org.wings.plaf.css;
import org.wings.SComponent;
import org.wings.border.SBorder;
import org.wings.io.Device;
import org.wings.plaf.css.Utils;
import java.io.IOException;
import java.awt.*;
/**
* This class collect various rendering workaround methods needed to fix issues with the Microsoft Internet Explorer.
* It is primarily kept as separate utility class for documentational and reference purpose!
*
* The methods call here should extensively document what they do and why to be maintainable.
*
* @author Benjamin Schmid
*/
public final class PaddingVoodoo
{
private PaddingVoodoo() {
}
//
// MSIE TABLE Padding Voodooo section --------------------------------------------------------------------------------------
//
/**
* @param component The component to inspect
* @return true if the componentn has any padding insets requiring workaround
*/
public static boolean hasPaddingInsets(final SComponent component) {
if (component == null || component.getBorder() == null)
return false;
final Insets insets = component.getBorder().getInsets();
return insets != null && (insets.top > 0 || insets.left >0 || insets.right > 0 || insets.bottom > 0);
}
/**
* Utility method to add selected border's insets to the targetInsets.
* @param border border containing insets
* @param targetInsets Target inset to modify
* @param firstRow if true, add top to top
* @param firstCol if true, add left to left
* @param lastCol if true, add right to right
* @param lastRow if true, add bottom to bottom
*/
public static void doBorderPaddingsWorkaround(final SBorder border, final Insets targetInsets,
boolean firstRow, boolean firstCol, boolean lastCol, boolean lastRow) {
if (border != null && border.getInsets() != null) {
final Insets paddingInset = border.getInsets();
if (firstRow)
targetInsets.top += paddingInset.top;
if (firstCol)
targetInsets.left += paddingInset.left;
if (lastCol)
targetInsets.right+= paddingInset.right;
if (lastRow)
targetInsets.bottom+= paddingInset.bottom;
}
}
/**
* MSIE does not support PADDING on table elements.
* For borders we re-render their insets (which are paddings) on the inner TD elements.
*
* Call this method after <TD and before >
* @param d target device
* @param component source component
*/
public static void doSimpleTablePaddingWorkaround(final Device d, final SComponent component) throws IOException {
if (component == null)
return;
if (component.getBorder() != null && Utils.hasInsets(component.getBorder().getInsets())) {
final StringBuilder stringBuilder = new StringBuilder();
Utils.createInlineStylesForInsets(stringBuilder, component.getBorder().getInsets());
Utils.optAttribute(d, "style", stringBuilder);
}
}
//
// MSIE ????????????????? section --------------------------------------------------------------------------------------
//
}