Add files from jline for diff visibility

src/main/java/jline/AnsiWindowsTerminal.java

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+/*
+ * Copyright (C) 2009 the original author(s).
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * MODIFICATIONS: methods to deal with wrapping the output stream.
+ */
+
+package jline;
+
+import org.fusesource.jansi.AnsiConsole;
+import org.fusesource.jansi.AnsiOutputStream;
+import org.fusesource.jansi.WindowsAnsiOutputStream;
+
+import java.io.ByteArrayOutputStream;
+import java.io.OutputStream;
+
+/**
+ * ANSI-supported {@link WindowsTerminal}.
+ *
+ * @since 2.0
+ */
+public class AnsiWindowsTerminal
+    extends WindowsTerminal
+{
+    private final boolean ansiSupported = detectAnsiSupport();
+
+    @Override
+    public OutputStream wrapOutIfNeeded(OutputStream out) {
+        return wrapOutputStream(out);
+    }
+
+    /**
+     * Returns an ansi output stream handler. We return whatever was
+     * passed if we determine we cannot handle ansi based on Kernel32 calls.
+     * 
+     * @return an @{link AltWindowAnsiOutputStream} instance or the passed 
+     * stream.
+     */
+    private static OutputStream wrapOutputStream(final OutputStream stream) {
+        String os = System.getProperty("os.name");
+        if( os.startsWith("Windows") ) {
+            // On windows we know the console does not interpret ANSI codes..
+            try {
+                return new WindowsAnsiOutputStream(stream);
+            } catch (Throwable ignore) {
+                // this happens when JNA is not in the path.. or
+                // this happens when the stdout is being redirected to a file.
+            }
+            // Use the ANSIOutputStream to strip out the ANSI escape sequences.
+            return new AnsiOutputStream(stream);
+        }
+        return stream;
+    }
+
+    private static boolean detectAnsiSupport() {
+        OutputStream out = AnsiConsole.wrapOutputStream(new ByteArrayOutputStream());
+        try {
+            out.close();
+        }
+        catch (Exception e) {
+            // ignore;
+        }
+        return out instanceof WindowsAnsiOutputStream;
+    }
+
+    public AnsiWindowsTerminal() throws Exception {
+        super();
+    }
+
+    @Override
+    public boolean isAnsiSupported() {
+        return ansiSupported;
+    }
+
+    @Override
+    public boolean hasWeirdWrap() {
+        return false;
+    }
+}

src/main/java/jline/internal/TerminalLineSettings.java

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+/*
+ * Copyright (c) 2002-2007, Marc Prud'hommeaux. All rights reserved.
+ *
+ * This software is distributable under the BSD license. See the terms of the
+ * BSD license in the documentation provided with this software.
+ */
+
+package jline.internal;
+
+import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.text.MessageFormat;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Provides access to terminal line settings via <tt>stty</tt>.
+ *
+ * @author <a href="mailto:mwp1@cornell.edu">Marc Prud'hommeaux</a>
+ * @author <a href="mailto:dwkemp@gmail.com">Dale Kemp</a>
+ * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
+ * @author <a href="mailto:jbonofre@apache.org">Jean-Baptiste Onofré</a>
+ * @since 2.0
+ */
+public final class TerminalLineSettings
+{
+    public static final String JLINE_STTY = "jline.stty";
+
+    public static final String DEFAULT_STTY = "stty";
+
+    public static final String JLINE_SH = "jline.sh";
+
+    public static final String DEFAULT_SH = "sh";
+
+    private String sttyCommand;
+
+    private String shCommand;
+
+    private String config;
+
+    private long configLastFetched;
+
+    public TerminalLineSettings() throws IOException, InterruptedException {
+        sttyCommand = Configuration.getString(JLINE_STTY, DEFAULT_STTY);
+        shCommand = Configuration.getString(JLINE_SH, DEFAULT_SH);
+        config = get("-a");
+        configLastFetched = System.currentTimeMillis();
+
+        Log.debug("Config: ", config);
+
+        // sanity check
+        if (config.length() == 0) {
+            throw new IOException(MessageFormat.format("Unrecognized stty code: {0}", config));
+        }
+    }
+
+    public String getConfig() {
+        return config;
+    }
+
+    public void restore() throws IOException, InterruptedException {
+        set("sane");
+    }
+
+    public String get(final String args) throws IOException, InterruptedException {
+        return stty(args);
+    }
+
+    public void set(final String args) throws IOException, InterruptedException {
+        stty(args);
+    }
+
+    /**
+     * <p>
+     * Get the value of a stty property, including the management of a cache.
+     * </p>
+     *
+     * @param name the stty property.
+     * @return the stty property value.                        
+     */
+    public int getProperty(String name) {
+        assert name != null;
+        try {
+            // tty properties are cached so we don't have to worry too much about getting term widht/height
+            if (config == null || System.currentTimeMillis() - configLastFetched > 1000 ) {
+                config = get("-a");
+                configLastFetched = System.currentTimeMillis();
+            }
+            return this.getProperty(name, config);
+        } catch (Exception e) {
+            Log.warn("Failed to query stty ", name, e);            
+            return -1;
+        }
+    }
+
+    /**
+     * <p>
+     * Parses a stty output (provided by stty -a) and return the value of a given property.
+     * </p>
+     *
+     * @param name property name.
+     * @param stty string resulting of stty -a execution.
+     * @return value of the given property.
+     */
+    protected static int getProperty(String name, String stty) {
+        // try the first kind of regex
+        Pattern pattern = Pattern.compile(name + "\\s+=\\s+([^;]*)[;\\n\\r]");
+        Matcher matcher = pattern.matcher(stty);
+        if (!matcher.find()) {
+            // try a second kind of regex
+            pattern = Pattern.compile(name + "\\s+([^;]*)[;\\n\\r]");
+            matcher = pattern.matcher(stty);
+            if (!matcher.find()) {
+                // try a second try of regex
+                pattern = Pattern.compile("(\\S*)\\s+" + name);
+                matcher = pattern.matcher(stty);
+                if (!matcher.find()) {
+                    return -1;
+                }
+            }
+        }
+        return parseControlChar(matcher.group(1));
+    }
+
+    private static int parseControlChar(String str) {
+        // under
+        if ("<undef>".equals(str)) {
+            return -1;
+        }
+        // octal
+        if (str.charAt(0) == '0') {
+            return Integer.parseInt(str, 8);
+        }
+        // decimal
+        if (str.charAt(0) >= '1' && str.charAt(0) <= '9') {
+            return Integer.parseInt(str, 10);
+        }
+        // control char
+        if (str.charAt(0) == '^') {
+            if (str.charAt(1) == '?') {
+                return 127;
+            } else {
+                return str.charAt(1) - 64;
+            }
+        } else if (str.charAt(0) == 'M' && str.charAt(1) == '-') {
+            if (str.charAt(2) == '^') {
+                if (str.charAt(3) == '?') {
+                    return 127 + 128;
+                } else {
+                    return str.charAt(3) - 64 + 128;
+                }
+            } else {
+                return str.charAt(2) + 128;
+            }
+        } else {
+            return str.charAt(0);
+        }
+    }
+
+    private String stty(final String args) throws IOException, InterruptedException {
+        assert args != null;
+        return exec(String.format("%s %s < /dev/tty", sttyCommand, args));
+    }
+
+    private String exec(final String cmd) throws IOException, InterruptedException {
+        assert cmd != null;
+        return exec(shCommand, "-c", cmd);
+    }
+
+    private String exec(final String... cmd) throws IOException, InterruptedException {
+        assert cmd != null;
+
+        ByteArrayOutputStream bout = new ByteArrayOutputStream();
+
+        Log.trace("Running: ", cmd);
+
+        Process p = Runtime.getRuntime().exec(cmd);
+
+        InputStream in = null;
+        InputStream err = null;
+        OutputStream out = null;
+        try {
+            int c;
+            in = p.getInputStream();
+            while ((c = in.read()) != -1) {
+                bout.write(c);
+            }
+            err = p.getErrorStream();
+            while ((c = err.read()) != -1) {
+                bout.write(c);
+            }
+            out = p.getOutputStream();
+            p.waitFor();
+        }
+        finally {
+            close(in, out, err);
+        }
+
+        String result = bout.toString();
+
+        Log.trace("Result: ", result);
+
+        return result;
+    }
+
+    private static void close(final Closeable... closeables) {
+        for (Closeable c : closeables) {
+            try {
+                c.close();
+            }
+            catch (Exception e) {
+                // Ignore
+            }
+        }
+    }
+}