org.bitbucket.johness.javacef.CefHelper Maven / Gradle / Ivy

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java-cef maven support by johness
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package org.bitbucket.johness.javacef;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.nio.file.Files;

/**
 * Cef natives file extract helper
 */
public final class CefHelper {

	private static String[] localeFiles = new String[] { "am.pak", "ar.pak", "bg.pak", "bn.pak", "ca.pak", "cs.pak",
			"da.pak", "de.pak", "el.pak", "en-GB.pak", "en-US.pak", "es-419.pak", "es.pak", "et.pak", "fa.pak", "fi.pak",
			"fil.pak", "fr.pak", "gu.pak", "he.pak", "hi.pak", "hr.pak", "hu.pak", "id.pak", "it.pak", "ja.pak",
			"kn.pak", "ko.pak", "lt.pak", "lv.pak", "ml.pak", "mr.pak", "ms.pak", "nb.pak", "nl.pak", "pl.pak",
			"pt-BR.pak", "pt-PT.pak", "ro.pak", "ru.pak", "sk.pak", "sl.pak", "sr.pak", "sv.pak", "sw.pak", "ta.pak",
			"te.pak", "th.pak", "tr.pak", "uk.pak", "vi.pak", "zh-CN.pak", "zh-TW.pak" };
	private static String[] cefFiles = new String[] { "cef.pak", "cef_100_percent.pak", "cef_200_percent.pak",
			"cef_extensions.pak", "d3dcompiler_43.dll", "d3dcompiler_47.dll", "devtools_resources.pak", "icudtl.dat",
			"jcef.dll", "jcef_helper.exe", "libcef.dll", "libEGL.dll", "libGLESv2.dll", "natives_blob.bin",
			"snapshot_blob.bin" };

	/**
	 * exract native and resource files to temp dir and set to
	 * "java.library.path"
	 * @throws Exception 
	 */
	public static void extractNativeAndResource() throws Exception {
		// create temp dir first
		File tempDir = Files.createTempDirectory(null).toFile();
		// localesDir
		File localesDir = new File(tempDir.getPath() + File.separator + "locales");
		if (!localesDir.mkdir())
			return;

		// extract cef files
		for (String cefFileName : cefFiles) {
			File cefFile = new File(tempDir.getPath() + File.separator + cefFileName);
			cefFile.createNewFile();
			InputStream is = CefHelper.class.getResourceAsStream("/" + cefFileName);
			FileOutputStream fos = new FileOutputStream(cefFile);
			int byteCount = 0;

			byte[] bytes = new byte[1024];

			while ((byteCount = is.read(bytes)) != -1) {
				fos.write(bytes, 0, byteCount);
			}
			is.close();
			fos.close();
		}

		// extrac locale files
		for (String localFileName : localeFiles) {
			File localeFile = new File(localesDir.getPath() + File.separator + localFileName);
			localeFile.createNewFile();
			InputStream is = CefHelper.class.getResourceAsStream("/locales/" + localFileName);
			FileOutputStream fos = new FileOutputStream(localeFile);
			int byteCount = 0;

			byte[] bytes = new byte[1024];

			while ((byteCount = is.read(bytes)) != -1) {
				fos.write(bytes, 0, byteCount);
			}
			is.close();
			fos.close();
		}

		addLibraryDir(tempDir.getPath());
	}

	private static void addLibraryDir(String libraryPath) throws Exception {
		Field userPathsField = ClassLoader.class.getDeclaredField("usr_paths");
		userPathsField.setAccessible(true);
		String[] paths = (String[]) userPathsField.get(null);
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < paths.length; i++) {
			if (libraryPath.equals(paths[i])) {
				continue;
			}
			sb.append(paths[i]).append(File.pathSeparatorChar);
		}
		sb.append(libraryPath);
		System.setProperty("java.library.path", sb.toString());
		final Field sysPathsField = ClassLoader.class.getDeclaredField("sys_paths");
		sysPathsField.setAccessible(true);
		sysPathsField.set(null, null);
	}
	
	/*public static void addLibraryDir(String libraryPath) throws IOException {
		try {
			Field field = ClassLoader.class.getDeclaredField("usr_paths");
			field.setAccessible(true);
			String[] paths = (String[]) field.get(null);
			for (int i = 0; i < paths.length; i++) {
				if (libraryPath.equals(paths[i])) {
					return;
				}
			}

			String[] tmp = new String[paths.length + 1];
			System.arraycopy(paths, 0, tmp, 0, paths.length);
			tmp[paths.length] = libraryPath;
			field.set(null, tmp);
		} catch (IllegalAccessException e) {
			throw new IOException(
					"Failedto get permissions to set library path");
		} catch (NoSuchFieldException e) {
			throw new IOException(
					"Failedto get field handle to set library path");
		}
	}*/
}