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/*******************************************************************************
* Copyright (c) 2000, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.graphics;
import org.eclipse.swt.*;
/**
* Instances of this class describe operating system fonts.
*
* For platform-independent behaviour, use the get and set methods
* corresponding to the following properties:
*
* - height
- the height of the font in points
* - name
- the face name of the font, which may include the foundry
* - style
- A bitwise combination of NORMAL, ITALIC and BOLD
*
* If extra, platform-dependent functionality is required:
*
* - On Windows, the data member of the
FontData
* corresponds to a Windows LOGFONT structure whose fields
* may be retrieved and modified.
* - On X, the fields of the
FontData correspond
* to the entries in the font's XLFD name and may be retrieved and modified.
*
* Application code does not need to explicitly release the
* resources managed by each instance when those instances are no longer
* required, and thus no dispose() method is provided.
*
* @see Font
* @see Sample code and further information
*/
public final class FontData {
/**
* the font name
* (Warning: This field is platform dependent)
*
* IMPORTANT: This field is not part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
*
*
* @noreference This field is not intended to be referenced by clients.
*/
public String name;
/**
* The height of the font data in points
* (Warning: This field is platform dependent)
*
* IMPORTANT: This field is not part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
*
*
* @noreference This field is not intended to be referenced by clients.
*/
public float height;
/**
* the font style
* (Warning: This field is platform dependent)
*
* IMPORTANT: This field is not part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
*
*
* @noreference This field is not intended to be referenced by clients.
*/
public int style;
/**
* the Pango string
* (Warning: This field is platform dependent)
*
* IMPORTANT: This field is not part of the SWT
* public API. It is marked public only so that it can be shared
* within the packages provided by SWT. It is not available on all
* platforms and should never be accessed from application code.
*
*
* @noreference This field is not intended to be referenced by clients.
*/
public byte[] string;
/**
* The locales of the font
*/
String lang, country, variant;
/**
* Constructs a new uninitialized font data.
*/
public FontData () {
this("", 12, SWT.NORMAL);
}
/**
* Constructs a new FontData given a string representation
* in the form generated by the FontData.toString
* method.
*
* Note that the representation varies between platforms,
* and a FontData can only be created from a string that was
* generated on the same platform.
*
*
* @param string the string representation of a FontData (must not be null)
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the argument is null
* - ERROR_INVALID_ARGUMENT - if the argument does not represent a valid description
*
*
* @see #toString
*/
public FontData(String string) {
if (string == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
int start = 0;
int end = string.indexOf('|');
if (end == -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
String version1 = string.substring(start, end);
try {
if (Integer.parseInt(version1) != 1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
} catch (NumberFormatException e) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
start = end + 1;
end = string.indexOf('|', start);
if (end == -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
String name = string.substring(start, end);
start = end + 1;
end = string.indexOf('|', start);
if (end == -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
float height = 0;
try {
height = Float.parseFloat(string.substring(start, end));
} catch (NumberFormatException e) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
start = end + 1;
end = string.indexOf('|', start);
if (end == -1) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
int style = 0;
try {
style = Integer.parseInt(string.substring(start, end));
} catch (NumberFormatException e) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
start = end + 1;
end = string.indexOf('|', start);
setName(name);
setHeight(height);
setStyle(style);
if (end == -1) return;
String platform = string.substring(start, end);
start = end + 1;
end = string.indexOf('|', start);
if (end == -1) return;
String version2 = string.substring(start, end);
if (platform.equals("GTK") && version2.equals("1")) {
return;
}
}
/**
* Constructs a new font data given a font name,
* the height of the desired font in points,
* and a font style.
*
* @param name the name of the font (must not be null)
* @param height the font height in points
* @param style a bit or combination of NORMAL, BOLD, ITALIC
*
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - when the font name is null
* - ERROR_INVALID_ARGUMENT - if the height is negative
*
*/
public FontData(String name, int height, int style) {
setName(name);
setHeight(height);
setStyle(style);
}
/*public*/ FontData(String name, float height, int style) {
setName(name);
setHeight(height);
setStyle(style);
}
/**
* Compares the argument to the receiver, and returns true
* if they represent the same object using a class
* specific comparison.
*
* @param object the object to compare with this object
* @return true if the object is the same as this object and false otherwise
*
* @see #hashCode
*/
@Override
public boolean equals (Object object) {
if (object == this) return true;
if (!(object instanceof FontData)) return false;
FontData data = (FontData)object;
return name.equals(data.name) && height == data.height && style == data.style;
}
/**
* Returns the height of the receiver in points.
*
* @return the height of this FontData
*
* @see #setHeight(int)
*/
public int getHeight() {
return (int)(0.5f + height);
}
/*public*/ float getHeightF() {
return height;
}
/**
* Returns the locale of the receiver.
*
* The locale determines which platform character set this
* font is going to use. Widgets and graphics operations that
* use this font will convert UNICODE strings to the platform
* character set of the specified locale.
*
*
* On platforms where there are multiple character sets for a
* given language/country locale, the variant portion of the
* locale will determine the character set.
*
*
* @return the String representing a Locale object
* @since 3.0
*/
public String getLocale () {
StringBuilder buffer = new StringBuilder ();
char sep = '_';
if (lang != null) {
buffer.append (lang);
buffer.append (sep);
}
if (country != null) {
buffer.append (country);
buffer.append (sep);
}
if (variant != null) {
buffer.append (variant);
}
String result = buffer.toString ();
int length = result.length ();
if (length > 0) {
if (result.charAt (length - 1) == sep) {
result = result.substring (0, length - 1);
}
}
return result;
}
/**
* Returns the name of the receiver.
* On platforms that support font foundries, the return value will
* be the foundry followed by a dash ("-") followed by the face name.
*
* @return the name of this FontData
*
* @see #setName
*/
public String getName() {
return name;
}
/**
* Returns the style of the receiver which is a bitwise OR of
* one or more of the SWT constants NORMAL, BOLD
* and ITALIC.
*
* @return the style of this FontData
*
* @see #setStyle
*/
public int getStyle() {
return style;
}
/**
* Returns an integer hash code for the receiver. Any two
* objects that return true when passed to
* equals must return the same value for this
* method.
*
* @return the receiver's hash
*
* @see #equals
*/
@Override
public int hashCode () {
return name.hashCode() ^ getHeight() << 8 ^ style;
}
/**
* Sets the height of the receiver. The parameter is
* specified in terms of points, where a point is one
* seventy-second of an inch.
*
* @param height the height of the FontData
*
* @exception IllegalArgumentException
* - ERROR_INVALID_ARGUMENT - if the height is negative
*
*
* @see #getHeight
*/
public void setHeight(int height) {
if (height < 0) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
this.height = height;
this.string = null;
}
/*public*/ void setHeight(float height) {
if (height < 0 || Float.isNaN(height) || Float.isInfinite(height)) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
this.height = height;
this.string = null;
}
/**
* Sets the locale of the receiver.
*
* The locale determines which platform character set this
* font is going to use. Widgets and graphics operations that
* use this font will convert UNICODE strings to the platform
* character set of the specified locale.
*
*
* On platforms where there are multiple character sets for a
* given language/country locale, the variant portion of the
* locale will determine the character set.
*
*
* @param locale the String representing a Locale object
* @see java.util.Locale#toString
*/
public void setLocale(String locale) {
lang = country = variant = null;
if (locale != null) {
char sep = '_';
int length = locale.length();
int firstSep, secondSep;
firstSep = locale.indexOf(sep);
if (firstSep == -1) {
firstSep = secondSep = length;
} else {
secondSep = locale.indexOf(sep, firstSep + 1);
if (secondSep == -1) secondSep = length;
}
if (firstSep > 0) lang = locale.substring(0, firstSep);
if (secondSep > firstSep + 1) country = locale.substring(firstSep + 1, secondSep);
if (length > secondSep + 1) variant = locale.substring(secondSep + 1);
}
}
/**
* Sets the name of the receiver.
*
* Some platforms support font foundries. On these platforms, the name
* of the font specified in setName() may have one of the following forms:
*
* - a face name (for example, "courier")
* - a foundry followed by a dash ("-") followed by a face name (for example, "adobe-courier")
*
*
* In either case, the name returned from getName() will include the
* foundry.
*
*
* On platforms that do not support font foundries, only the face name
* (for example, "courier") is used in setName() and
* getName().
*
*
* @param name the name of the font data (must not be null)
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - when the font name is null
*
*
* @see #getName
*/
public void setName(String name) {
if (name == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
this.name = name;
this.string = null;
}
/**
* Sets the style of the receiver to the argument which must
* be a bitwise OR of one or more of the SWT
* constants NORMAL, BOLD and ITALIC. All other style bits are
* ignored.
*
* @param style the new style for this FontData
*
* @see #getStyle
*/
public void setStyle(int style) {
this.style = style;
this.string = null;
}
/**
* Returns a string representation of the receiver which is suitable
* for constructing an equivalent instance using the
* FontData(String) constructor.
*
* @return a string representation of the FontData
*
* @see FontData
*/
@Override
public String toString() {
StringBuilder buffer = new StringBuilder(128);
buffer.append("1|");
buffer.append(getName());
buffer.append("|");
buffer.append(getHeightF());
buffer.append("|");
buffer.append(getStyle());
buffer.append("|");
buffer.append("GTK|1|");
return buffer.toString();
}
}