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package org.eclipse.swt.widgets;
/*
* Licensed Materials - Property of IBM,
* SWT - The Simple Widget Toolkit,
* (c) Copyright IBM Corp 1998, 1999.
*/
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import java.util.*;
/**
* This class stores the extended styles that are available for a
* font as well as the sizes and styles that are available for each
* extended styles.
*/
class FontExtStyles {
final static String MEDIUM = "medium";
final static String BOLD = "bold";
final static String ITALIC = "italic";
private String faceName;
private boolean isScalable = false;
private Hashtable extStyles = new Hashtable(); // keys are extended styles,
// values a Vector with the
// corresponding sizes or null
// if the font is scalable
/**
* Create a new instance of the receiver for the font with the
* name 'faceName'.
*/
FontExtStyles(String faceName) {
this.faceName = faceName;
}
/**
* Add the extended style, style and size data of 'fontData'
* to the receiver.
* The face name in 'fontData' has to match the face name of
* the receiver.
*/
void add(FontData fontData) {
Hashtable extStyles = getExtStyles();
FontExtStyle extStyle;
Integer height;
String style;
if (fontData.getName().equals(getFaceName()) == false) {
return;
}
extStyle = (FontExtStyle) extStyles.get(fontData.addStyle);
if (extStyle == null) {
extStyle = new FontExtStyle();
extStyles.put(fontData.addStyle, extStyle);
}
if (fontData.getHeight() == 0) {
setScalable(true);
}
else { // add the font size if the font is not scalable
extStyle.addSize(fontData.getHeight());
}
// add the style
style = getStyleString(fontData.getStyle());
extStyle.addStyle(style);
}
/**
* Answer the extended styles stored by the receiver.
* See the class definition for an explanation of the returned
* data structure.
*/
Hashtable getExtStyles() {
return extStyles;
}
/**
* Answer the face name of the receiver.
* The extended styles are stored for this face name.
*/
String getFaceName() {
return faceName;
}
/**
* Answer the font sizes of the receiver for the extended style
* identified by 'extStyle'.
* @return the font sizes of the receiver for the extended style
* identified by 'extStyle'.
* Empty collection if isScalable() answers true.
*/
Vector getSizes(String extStyle) {
return ((FontExtStyle) getExtStyles().get(extStyle)).getSizes();
}
/**
* Answer the string displayed for 'style'
* @param style - the font style. Can be SWT.BOLD, SWT.ITALIC
* or both combined with logical OR.
*/
static String getStyleString(int style) {
String styleString;
if ((style & SWT.BOLD) != 0) {
styleString = BOLD;
}
else {
styleString = MEDIUM;
}
if ((style & SWT.ITALIC) != 0) {
styleString += ' ' + ITALIC;
}
return styleString;
}
/**
* Answer the font styles of the receiver for the extended style
* identified by 'extStyle'.
*/
Vector getStyles(String extStyle) {
return ((FontExtStyle) getExtStyles().get(extStyle)).getStyles();
}
/**
* Answer whether the receiver is scalable or not.
* @return true=receiver is scalable. false=receiver is not
* scalable. It stores all available font sizes.
*/
boolean isScalable() {
return isScalable;
}
/**
* Set whether the receiveris scalable..
* @param newIsScalable - true=receiver is scalable.
* false=receiver is not scalable. It stores all available font sizes.
*/
void setScalable(boolean newIsScalable) {
isScalable = newIsScalable;
}
}
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