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From: ddekany@apache.org
To: notifications@freemarker.incubator.apache.org
Date: Thu, 16 Feb 2017 23:08:33 -0000
Message-Id: <004a835b64834c36a570bfb1325c9c33@git.apache.org>
In-Reply-To: <e54acacd10ec4d29a45fc13c8bf3c7dc@git.apache.org>
References: <e54acacd10ec4d29a45fc13c8bf3c7dc@git.apache.org>
Subject: [08/54] [partial] incubator-freemarker git commit: Top level package
 name change to org.apache.freemarker,
 and some of of the internal package structure changes. Other smaller cleanup.
 To be continued...
archived-at: Thu, 16 Feb 2017 23:08:32 -0000

http://git-wip-us.apache.org/repos/asf/incubator-freemarker/blob/ecb4e230/src/main/java/freemarker/template/utility/StandardCompress.java
----------------------------------------------------------------------
diff --git a/src/main/java/freemarker/template/utility/StandardCompress.java b/src/main/java/freemarker/template/utility/StandardCompress.java
deleted file mode 100644
index 4a40acf..0000000
--- a/src/main/java/freemarker/template/utility/StandardCompress.java
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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.
- */
-
-package freemarker.template.utility;
-
-import java.io.IOException;
-import java.io.Writer;
-import java.util.Map;
-
-import freemarker.template.TemplateBooleanModel;
-import freemarker.template.TemplateModelException;
-import freemarker.template.TemplateNumberModel;
-import freemarker.template.TemplateTransformModel;
-
-/**
- * <p>A filter that compresses each sequence of consecutive whitespace
- * to a single line break (if the sequence contains a line break) or a
- * single space. In addition, leading and trailing whitespace is
- * completely removed.</p>
- * 
- * <p>Specify the transform parameter <code>single_line = true</code>
- * to always compress to a single space instead of a line break.</p>
- * 
- * <p>The default buffer size can be overridden by specifying a
- * <code>buffer_size</code> transform parameter (in bytes).</p>
- *
- * <p><b>Note:</b> The compress tag is implemented using this filter</p>
- * 
- * <p>Usage:<br>
- * From java:</p>
- * <pre>
- * SimpleHash root = new SimpleHash();
- *
- * root.put( "standardCompress", new freemarker.template.utility.StandardCompress() );
- *
- * ...
- * </pre>
- *
- * <p>From your FreeMarker template:</p>
- * <pre>
- * &lt;transform standardCompress&gt;
- *   &lt;p&gt;This    paragraph will have
- *       extraneous
- *
- * whitespace removed.&lt;/p&gt;
- * &lt;/transform&gt;
- * </pre>
- *
- * <p>Output:</p>
- * <pre>
- * &lt;p&gt;This paragraph will have
- * extraneous
- * whitespace removed.&lt;/p&gt;
- * </pre>
- */
-public class StandardCompress implements TemplateTransformModel {
-    private static final String BUFFER_SIZE_KEY = "buffer_size";
-    private static final String SINGLE_LINE_KEY = "single_line";
-    private int defaultBufferSize;
-
-    public static final StandardCompress INSTANCE = new StandardCompress();
-    
-    public StandardCompress() {
-        this(2048);
-    }
-
-    /**
-     * @param defaultBufferSize the default amount of characters to buffer
-     */
-    public StandardCompress(int defaultBufferSize) {
-        this.defaultBufferSize = defaultBufferSize;
-    }
-
-    public Writer getWriter(final Writer out, Map args)
-    throws TemplateModelException {
-        int bufferSize = defaultBufferSize;
-        boolean singleLine = false;
-        if (args != null) {
-            try {
-                TemplateNumberModel num = (TemplateNumberModel) args.get(BUFFER_SIZE_KEY);
-                if (num != null)
-                    bufferSize = num.getAsNumber().intValue();
-            } catch (ClassCastException e) {
-                throw new TemplateModelException("Expecting numerical argument to " + BUFFER_SIZE_KEY);
-            }
-            try {
-                TemplateBooleanModel flag = (TemplateBooleanModel) args.get(SINGLE_LINE_KEY);
-                if (flag != null)
-                    singleLine = flag.getAsBoolean();
-            } catch (ClassCastException e) {
-                throw new TemplateModelException("Expecting boolean argument to " + SINGLE_LINE_KEY);
-            }
-        }
-        return new StandardCompressWriter(out, bufferSize, singleLine);
-    }
-
-    private static class StandardCompressWriter extends Writer {
-        private static final int MAX_EOL_LENGTH = 2; // CRLF is two bytes
-        
-        private static final int AT_BEGINNING = 0;
-        private static final int SINGLE_LINE = 1;
-        private static final int INIT = 2;
-        private static final int SAW_CR = 3;
-        private static final int LINEBREAK_CR = 4;
-        private static final int LINEBREAK_CRLF = 5;
-        private static final int LINEBREAK_LF = 6;
-
-        private final Writer out;
-        private final char[] buf;
-        private final boolean singleLine;
-    
-        private int pos = 0;
-        private boolean inWhitespace = true;
-        private int lineBreakState = AT_BEGINNING;
-
-        public StandardCompressWriter(Writer out, int bufSize, boolean singleLine) {
-            this.out = out;
-            this.singleLine = singleLine;
-            buf = new char[bufSize];
-        }
-
-        @Override
-        public void write(char[] cbuf, int off, int len) throws IOException {
-            for (; ; ) {
-                // Need to reserve space for the EOL potentially left in the state machine
-                int room = buf.length - pos - MAX_EOL_LENGTH; 
-                if (room >= len) {
-                    writeHelper(cbuf, off, len);
-                    break;
-                } else if (room <= 0) {
-                    flushInternal();
-                } else {
-                    writeHelper(cbuf, off, room);
-                    flushInternal();
-                    off += room;
-                    len -= room;
-                }
-            }
-        }
-
-        private void writeHelper(char[] cbuf, int off, int len) {
-            for (int i = off, end = off + len; i < end; i++) {
-                char c = cbuf[i];
-                if (Character.isWhitespace(c)) {
-                    inWhitespace = true;
-                    updateLineBreakState(c);
-                } else if (inWhitespace) {
-                    inWhitespace = false;
-                    writeLineBreakOrSpace();
-                    buf[pos++] = c;
-                } else {
-                    buf[pos++] = c;
-                }
-            }
-        }
-
-        /*
-          \r\n    => CRLF
-          \r[^\n] => CR
-          \r$     => CR
-          [^\r]\n => LF
-          ^\n     => LF
-        */
-        private void updateLineBreakState(char c) {
-            switch (lineBreakState) {
-            case INIT:
-                if (c == '\r') {
-                    lineBreakState = SAW_CR;
-                } else if (c == '\n') {
-                    lineBreakState = LINEBREAK_LF;
-                }
-                break;
-            case SAW_CR:
-                if (c == '\n') {
-                    lineBreakState = LINEBREAK_CRLF;
-                } else {
-                    lineBreakState = LINEBREAK_CR;
-                }
-            }
-        }
-
-        private void writeLineBreakOrSpace() {
-            switch (lineBreakState) {
-            case SAW_CR:
-                // whitespace ended with CR, fall through
-            case LINEBREAK_CR:
-                buf[pos++] = '\r';
-                break;
-            case LINEBREAK_CRLF:
-                buf[pos++] = '\r';
-                // fall through
-            case LINEBREAK_LF:
-                buf[pos++] = '\n';
-                break;
-            case AT_BEGINNING:
-                // ignore leading whitespace
-                break;
-            case INIT:
-            case SINGLE_LINE:
-                buf[pos++] = ' ';
-            }
-            lineBreakState = (singleLine) ? SINGLE_LINE : INIT;
-        }
-
-        private void flushInternal() throws IOException {
-            out.write(buf, 0, pos);
-            pos = 0;
-        }
-
-        @Override
-        public void flush() throws IOException {
-            flushInternal();
-            out.flush();
-        }
-
-        @Override
-        public void close() throws IOException {
-            flushInternal();
-        }
-    }
-}