--- /dev/null
+/**
+ * Jexer - Java Text User Interface
+ *
+ * Version: $Id$
+ *
+ * Author: Kevin Lamonte, <a href="mailto:kevin.lamonte@gmail.com">kevin.lamonte@gmail.com</a>
+ *
+ * License: LGPLv3 or later
+ *
+ * Copyright: This module is licensed under the GNU Lesser General
+ * Public License Version 3. Please see the file "COPYING" in this
+ * directory for more information about the GNU Lesser General Public
+ * License Version 3.
+ *
+ * Copyright (C) 2015 Kevin Lamonte
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see
+ * http://www.gnu.org/licenses/, or write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+package jexer.session;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.util.Date;
+import java.util.StringTokenizer;
+
+/**
+ * TTYSessionInfo queries environment variables and the tty window size for
+ * the session information. The username is taken from
+ * getpwuid(geteuid()).pw_name, language is taken from LANG, and text window
+ * size from ioctl(TIOCGWINSIZ).
+ */
+public class TTYSessionInfo implements SessionInfo {
+
+ /**
+ * User name
+ */
+ private String username = "";
+
+ /**
+ * Language
+ */
+ private String language = "";
+
+ /**
+ * Text window width. Default is 80x24 (same as VT100-ish terminals).
+ */
+ private int windowWidth = 80;
+
+ /**
+ * Text window height. Default is 80x24 (same as VT100-ish terminals).
+ */
+ private int windowHeight = 24;
+
+ /**
+ * Time at which the window size was refreshed
+ */
+ private Date lastQueryWindowTime;
+
+ /**
+ * Username getter
+ *
+ * @return the username
+ */
+ public String getUsername() {
+ return this.username;
+ }
+
+ /**
+ * Username setter
+ *
+ * @param username the value
+ */
+ public void setUsername(String username) {
+ this.username = username;
+ }
+
+ /**
+ * Language getter
+ *
+ * @return the language
+ */
+ public String getLanguage() {
+ return this.language;
+ }
+
+ /**
+ * Language setter
+ *
+ * @param language the value
+ */
+ public void setLanguage(String language) {
+ this.language = language;
+ }
+
+ /**
+ * Call 'stty size' to obtain the tty window size. windowWidth and
+ * windowHeight are set automatically.
+ */
+ private void sttyWindowSize() {
+ String [] cmd = {
+ "/bin/sh", "-c", "stty size < /dev/tty"
+ };
+ try {
+ System.out.println("spawn stty");
+
+ Process process = Runtime.getRuntime().exec(cmd);
+ BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream(), "UTF-8"));
+ String line = in.readLine();
+ if ((line != null) && (line.length() > 0)) {
+ StringTokenizer tokenizer = new StringTokenizer(line);
+ windowHeight = Integer.parseInt(tokenizer.nextToken());
+ windowWidth = Integer.parseInt(tokenizer.nextToken());
+ }
+ while (true) {
+ BufferedReader err = new BufferedReader(new InputStreamReader(process.getErrorStream(), "UTF-8"));
+ line = err.readLine();
+ if ((line != null) && (line.length() > 0)) {
+ System.err.println("Error output from stty: " + line);
+ }
+ try{
+ process.waitFor();
+ break;
+ } catch (InterruptedException e) {
+ e.printStackTrace();
+ }
+ }
+ int rc = process.exitValue();
+ if (rc != 0) {
+ System.err.println("stty returned error code: " + rc);
+ }
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+
+ /**
+ * Text window width getter
+ *
+ * @return the window width
+ */
+ public int getWindowWidth() {
+ if (System.getProperty("os.name").startsWith("Windows")) {
+ // Always use 80x25 for Windows (same as DOS)
+ return 80;
+ }
+ return windowWidth;
+ }
+
+ /**
+ * Text window height getter
+ *
+ * @return the window height
+ */
+ public int getWindowHeight() {
+ if (System.getProperty("os.name").startsWith("Windows")) {
+ // Always use 80x25 for Windows (same as DOS)
+ return 25;
+ }
+ return windowHeight;
+ }
+
+ /**
+ * Re-query the text window size
+ */
+ public void queryWindowSize() {
+ if (lastQueryWindowTime == null) {
+ lastQueryWindowTime = new Date();
+ } else {
+ Date now = new Date();
+ if (now.getTime() - lastQueryWindowTime.getTime() < 3000) {
+ // Don't re-spawn stty, it's been too soon.
+ return;
+ }
+ }
+ if (System.getProperty("os.name").startsWith("Linux") ||
+ System.getProperty("os.name").startsWith("Mac OS X") ||
+ System.getProperty("os.name").startsWith("SunOS") ||
+ System.getProperty("os.name").startsWith("FreeBSD")
+ ) {
+ // Use stty to get the window size
+ sttyWindowSize();
+ }
+ }
+
+ /**
+ * Public constructor
+ */
+ public TTYSessionInfo() {
+ // Populate lang and user from the environment
+ username = System.getProperty("user.name");
+ language = System.getProperty("user.language");
+ queryWindowSize();
+ }
+}
git://git.nikiroo.be / nikiroo-utils.git / commitdiff