Java Doc for LegacyCompressor.java in  » Ajax » dwr » org » directwebremoting » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Ajax » dwr » org.directwebremoting.impl   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.directwebremoting.impl.LegacyCompressor LegacyCompressor public class LegacyCompressor implements Compressor(Code) An implementation of Compressor that does nothing. author:    Joe Walker [joe at getahead dot ltd dot uk] Field Summary final public static  int COMPRESS_REMOVE_NEWLINES      Flag for use in javascript compression: Remove all lines endings. Warning: Javascript can add semi-colons in for you. final public static  int COMPRESS_SHRINK_VARS      Flag for use in javascript compression: Shrink variable names. final public static  int COMPRESS_STRIP_BLANKLINES      Flag for use in javascript compression: Remove blank lines. final public static  int COMPRESS_STRIP_ML_COMMENTS      Flag for use in javascript compression: Remove multi line comments. final public static  int COMPRESS_STRIP_SL_COMMENTS      Flag for use in javascript compression: Remove single line comments. final public static  int COMPRESS_TRIM_LINES      Flag for use in javascript compression: Remove whitespace at the start and end of a line. final public static  int LEVEL_DEBUGGABLE      Basic compression that leaves the source fully debuggable. final public static  int LEVEL_NONE      Compression level that leaves the source un-touched. final public static  int LEVEL_NORMAL      Normal compression makes all changes that will work for generic javascript. final public static  int LEVEL_ULTRA      LEVEL_ULTRA performs additional compression that makes some assumptions about the style of javascript. protected  int compressionLevel      Method Summary public static  String compress(String text, int level)      Compress the source code by removing java style comments and removing leading and trailing spaces. Parameters:   text - The javascript (or java) program to compress Parameters:   level - The compression level - see LEVEL_* and COMPRESS_* constants. public  String compressJavaScript(String script)      public  void setCompressionLevel(int compressionLevel)      public static  String shrinkVariableNames(String text)      Shrink variable names to a minimum. Parameters:   text - The javascript program to shrink the variable names in. public static  String stripBlankLines(String text)      Remove all blank lines from a string. public static  String stripMultiLineComments(String text)      public static  String stripNewlines(String text)      Remove all newline characters from a string. public static  String stripSingleLineComments(String text)      public static  String trimLines(String text)      Remove any leading or trailing spaces from a line of code. This function could be improved by making it strip unnecessary double spaces, but since we would need to leave double spaces inside strings this is not simple and since the benefit is small, we'll leave it for now Parameters:   text - The javascript program to strip spaces from. Field Detail COMPRESS_REMOVE_NEWLINES final public static int COMPRESS_REMOVE_NEWLINES(Code) Flag for use in javascript compression: Remove all lines endings. Warning: Javascript can add semi-colons in for you. If you make use of this feature then removing newlines may well break. For ease of use you may wish to use one of the LEVEL_* compression levels. COMPRESS_SHRINK_VARS final public static int COMPRESS_SHRINK_VARS(Code) Flag for use in javascript compression: Shrink variable names. This option is currently un-implemented. For ease of use you may wish to use one of the LEVEL_* compression levels. COMPRESS_STRIP_BLANKLINES final public static int COMPRESS_STRIP_BLANKLINES(Code) Flag for use in javascript compression: Remove blank lines. This option will make the javascript harder to debug because line number references are likely be altered. For ease of use you may wish to use one of the LEVEL_* compression levels. COMPRESS_STRIP_ML_COMMENTS final public static int COMPRESS_STRIP_ML_COMMENTS(Code) Flag for use in javascript compression: Remove multi line comments. For ease of use you may wish to use one of the LEVEL_* compression levels. COMPRESS_STRIP_SL_COMMENTS final public static int COMPRESS_STRIP_SL_COMMENTS(Code) Flag for use in javascript compression: Remove single line comments. For ease of use you may wish to use one of the LEVEL_* compression levels. COMPRESS_TRIM_LINES final public static int COMPRESS_TRIM_LINES(Code) Flag for use in javascript compression: Remove whitespace at the start and end of a line. For ease of use you may wish to use one of the LEVEL_* compression levels. LEVEL_DEBUGGABLE final public static int LEVEL_DEBUGGABLE(Code) Basic compression that leaves the source fully debuggable. This includes removing all comments and extraneous whitespace. LEVEL_NONE final public static int LEVEL_NONE(Code) Compression level that leaves the source un-touched. LEVEL_NORMAL final public static int LEVEL_NORMAL(Code) Normal compression makes all changes that will work for generic javascript. This adds variable name compression and blank line removal in addition to the compressions done by LEVEL_DEBUGGABLE. LEVEL_ULTRA final public static int LEVEL_ULTRA(Code) LEVEL_ULTRA performs additional compression that makes some assumptions about the style of javascript. Specifically it assumes that you are not using JavaScript's ability to infer where the ; should go. compressionLevel protected int compressionLevel(Code) How much do we compression javascript by? Method Detail compress public static String compress(String text, int level)(Code) Compress the source code by removing java style comments and removing leading and trailing spaces. Parameters:   text - The javascript (or java) program to compress Parameters:   level - The compression level - see LEVEL_* and COMPRESS_* constants. The compressed version compressJavaScript public String compressJavaScript(String script) throws IOException(Code) setCompressionLevel public void setCompressionLevel(int compressionLevel)(Code) Parameters:   compressionLevel - The compressionLevel to set. shrinkVariableNames public static String shrinkVariableNames(String text)(Code) Shrink variable names to a minimum. Parameters:   text - The javascript program to shrink the variable names in. The shrunk version of the javascript program. stripBlankLines public static String stripBlankLines(String text)(Code) Remove all blank lines from a string. A blank line is defined to be a line where the only characters are whitespace. We always ensure that the line contains a newline at the end. Parameters:   text - The string to strip blank lines from The blank line stripped reply stripMultiLineComments public static String stripMultiLineComments(String text)(Code) Remove all the multi-line comments from a block of text Parameters:   text - The text to remove multi-line comments from The multi-line comment free text stripNewlines public static String stripNewlines(String text)(Code) Remove all newline characters from a string. Parameters:   text - The string to strip newline characters from The stripped reply stripSingleLineComments public static String stripSingleLineComments(String text)(Code) Remove all the single-line comments from a block of text Parameters:   text - The text to remove single-line comments from The single-line comment free text trimLines public static String trimLines(String text)(Code) Remove any leading or trailing spaces from a line of code. This function could be improved by making it strip unnecessary double spaces, but since we would need to leave double spaces inside strings this is not simple and since the benefit is small, we'll leave it for now Parameters:   text - The javascript program to strip spaces from. The stripped program Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)