package com.fxexperience.javafx.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javafx.scene.text.Font;
/**
* This is a simple helper class that lets you use fonts from the Google
* Web Fonts service inside JavaFX. You can use the fonts in code or CSS.
*
* In Code all you need to do is:
* Font myFont = Font.font(GoogleWebFontHelper.loadFont("http://....."), 40);
*
* In CSS you need to first load the font in Code early in your app before you
* load any stylesheets. Using a line like:
* Font.font(GoogleWebFontHelper.loadFont("http://....."), 40);
* Then you can just use the name of the font in CSS like:
* #MyNodeID {
* -fx-font-family: 'Seaweed Script';
* -fx-font-size: 30px;
* }
*
* In both of these uses the http://..... is the URL to the stylesheet you get
* from the google web fonts quick use page. They have something like this:
*
* 3. Add this code to your website:
* <link href='http://fonts.googleapis.com/css?family=Raleway:100' rel='stylesheet' type='text/css'>
*
* All you need is the http url to copy and paste into your loadFont() call.
*
* @author Jasper Potts
*/
public class GoogleWebFontHelper {
private static final Pattern TTF_PATTERN = Pattern.compile("http:.*\\.ttf");
private static final Pattern OTF_PATTERN = Pattern.compile("http:.*\\.otf");
/**
* Load a font from Google Web Fonts Service
*
* Note: this is only designed to work with simple stylesheets with single
* font in them.
*
* @param googleFontCssUrl The url to css stylesheet with @fontface definition
* @return The name of the font family, or "System" if there was a error
*/
public static String loadFont(String googleFontCssUrl) {
String fontName = "System";
try {
URL cssUrl = new URL(googleFontCssUrl);
URLConnection con = cssUrl.openConnection();
InputStream in = con.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line = null;
String fontUrl = null;
StringBuilder srcs = new StringBuilder();
while((line = reader.readLine()) != null) {
// System.out.println(line);
if (line.contains("src:")) {
Matcher matcher = TTF_PATTERN.matcher(line);
if (matcher.find()) {
fontUrl = matcher.group(0);
// System.out.println("FOUND fontUrl = " + fontUrl);
break;
}
matcher = OTF_PATTERN.matcher(line);
if (matcher.find()) {
fontUrl = matcher.group(0);
// System.out.println("FOUND fontUrl = " + fontUrl);
break;
}
srcs.append(line);
srcs.append('\n');
}
}
if (fontUrl != null) {
Font font = Font.loadFont(fontUrl, 10);
fontName = font.getFamily();
} else {
System.err.println("Failed to find any supported fonts "
+ "(TTF or OTF) in CSS src:\n"+srcs.toString());
}
} catch (IOException ex) {
System.err.println("Error loading Google Font CSS");
}
return fontName;
}
}