javacodehighlighter.java

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     *
     * @param numberStart the HTML tag to start bracket blocks.
     */
    public void setNumberStart(String numberStart) {
        this.numberStart = numberStart;
        viewer.setNumberStart(numberStart);
    }

    /**
     * Returns the HTML tag that ends character blocks. For example, it could be
     * <code>&lt;/font&gt;</code>.  This should correspond to the start tag
     * for bracket blocks.
     *
     * @return the HTML tag to end bracket blocks.
     */
    public String getNumberEnd() {
        return numberEnd;
    }

    /**
	 * Sets the HTML tag that ends number literals. For example, it could be
	 * <code>&lt;/font&gt;</code>.  This should  correspond to the start tag 
     * for number literals.
     *
     * @param numberEnd the HTML tag to end number literals.
     */
    public void setNumberEnd(String numberEnd) {
        this.numberEnd = numberEnd;
        viewer.setNumberEnd(numberEnd);
    }

    /**
     * See if method filtering is enabled.
     */
    public boolean getFilterMethod() {
        return filterMethod;
    }

    /**
     * Enables or disables method filtering.
     */
    public void setFilterMethod(boolean filterMethod) {
        this.filterMethod = filterMethod;
        viewer.setFilterMethod(filterMethod);
    }

    /**
     * See if number filtering is enabled.
     */
    public boolean getFilterNumber() {
        return filterNumber;
    }

    /**
     * Enables or disables number filtering.
     */
    public void setFilterNumber(boolean filterNumber) {
        this.filterNumber = filterNumber;
        viewer.setFilterNumber(filterNumber);
    }

    /**
     * Syntax highlights Java code that appears inside [code][/code] tags
     *
     * @param input the input string that possibly contains Java code
     * @return the input string, syntax highlighted with HTML
     */
    private String highlightCode(String input, boolean doTable) {
        // Check if the string is null or zero length -- if so, return what was sent in.
        if (input == null || input.length() == 0) {
            return input;
        }
        else {
            StringBuffer codeBuf = new StringBuffer(input.length());
            int i = 0;
            int j = 0;
            int oldend = 0;
            boolean doFilter = true;
            boolean noClosingTag = false;

            // This processes all [code][/code] tags inside an input string, iteratively.
            // Each iteration advances the i and j pointers to point to the positions of
            // the next pair of [code][/code] tags in the input, until all are processed
            while ((i=input.indexOf("[code]", oldend)) >= 0) {    // get the first unprocessed start position
                // Check to see where the ending code tag is and store this position in j
                if ((j=input.indexOf("[/code]", i+6)) < 0) {      // get the first unprocessed end position
                    if(input.length()>"[code]".length()) {
                        // End at end of input if no closing tag is given
                        // which is the first character after [code]
                        // [code]1afadsfasdfafasfasd
                        j = input.length()-7;
                        doFilter = true;
                        noClosingTag = true;
                    }
                    else {
                        // nothing to filter
                        i = -1;
                        j = i+6;
                        //j = input.length()-6;
                        doFilter = false;
                        noClosingTag = true;
                    }
                }
    //++++//
        if(doFilter) {
    //++++//
                // Take the string up to the code, append the string returned by JavaCodeViewer
                codeBuf.append(input.substring(oldend,i));

                // if we don't want a code table <pre> must be appended
                if(!doTable) {
                    codeBuf.append("<pre>");
                }

                String temp = codeBuf.toString();
                codeBuf = new StringBuffer();

                // start looking after the initial [code] tag
                // [code]123[/code]
                String edit = "";
                // String edit = input.substring(i+6,j);
                if(noClosingTag) {
                    edit = input.substring(i+6,j+7);
                }
                else {
                    edit = input.substring(i+6,j);
                }
                int editLength = edit.length();
                boolean endInNewline = true;
                boolean startWithNewline = true;

                if (editLength > 0) {
                    // if the last character is not a carriage return nor a newline
                    if(edit.charAt(editLength-1) != '\r' && edit.charAt(editLength-1) != '\n') {
                        endInNewline = false;
                    }
                    // if the first character is not a carriage return nor a newline
                    if (edit.charAt(0) != '\r' && edit.charAt(0) != '\n') {
                        startWithNewline = false;
                    }

                    String currSection = "";
                    if (endInNewline) {
                        if (startWithNewline) {
                            // get rid of initial newline and carriage return
                            // [code]\n\r(tokens)\n\r[/code]
                            currSection = deleteCarriages(edit.substring(2));
                            //codeBuf.append(temp).append(viewer.javaCodeFilter(deleteCarriages(edit.substring(2))));
                            if (doTable) {
                                codeBuf.append(temp).append(surroundWithTable(viewer.javaCodeFilter(currSection), 
                                                                              countLines(currSection)));    // what a hack
                            }
                            else {
                                codeBuf.append(temp).append(viewer.javaCodeFilter(currSection));
                            }
                        }
                        else {
                            // filter normally
                            // [code](tokens)\n\r[/code]
                            currSection = deleteCarriages(edit);
                            if (doTable) {
                                codeBuf.append(temp).append(surroundWithTable(viewer.javaCodeFilter(currSection), countLines(currSection)));
                            }
                            else {
                                codeBuf.append(temp).append(viewer.javaCodeFilter(currSection));
                            }
                            //codeBuf.append(temp).append(viewer.javaCodeFilter(deleteCarriages(edit)));
                        }
                    }
                    else {
                        if (startWithNewline) {
                            // get rid of initial newline and carriage return, then append an extra newline to compensate
                            // [code]\n\r(tokens)[/code]
                            currSection = deleteCarriages(edit.substring(2)+"\n");
                            if (doTable) {
                                codeBuf.append(temp).append(surroundWithTable(viewer.javaCodeFilter(currSection), countLines(currSection)));
                            }
                            else {
                                codeBuf.append(temp).append(viewer.javaCodeFilter(currSection));
                            }
                            //codeBuf.append(temp).append(viewer.javaCodeFilter(deleteCarriages(edit.substring(2)+"\n")));
                        }
                        else {
                            // append an extra newline to compensate
                            // [code](tokens)[/code]
                            currSection = deleteCarriages(edit+"\n");
                            if (doTable) {
                                codeBuf.append(temp).append(surroundWithTable(viewer.javaCodeFilter(currSection), countLines(currSection)));
                            }
                            else {
                                codeBuf.append(temp).append(viewer.javaCodeFilter(currSection));
                            }
                            //codeBuf.append(temp).append(viewer.javaCodeFilter(deleteCarriages(edit+"\n")));
                        }
                    }
                }
                else {
                    codeBuf.append(temp);
                }

                // escape braces to workaround TextStyle filter
                String code = codeBuf.toString();
                code = StringUtils.replace(code, "[", "&#91;");
                code = StringUtils.replace(code, "]", "&#93;");

                codeBuf = new StringBuffer().append(code);

                // if we don't want a code table <pre> must be appended
                if(!doTable) {
                    codeBuf.append("</pre>");
                }

                // Next time, start looking after the ending [/code] tag
                oldend = j+7;
                // the newline filter which is applied before this one
                // substitutes <BR> for \n\r or \n, so check to see
                // if a <BR> is immediately after [/code]
                if(input.length()>=oldend+3) {
                    // found one, so advance pointer ahead to ignore the <BR>
                    if(input.charAt(oldend)=='<' && input.charAt(oldend+1)=='B' && input.charAt(oldend+2)=='R' && input.charAt(oldend+3)=='>') {
                        //input = input.substring(0,oldend)+StringUtils.replace(input.substring(oldend,oldend+1), "\n", " ")+input.substring(oldend+1);
                        //if(input.charAt(oldend+1)=='\n' || input.charAt(oldend+1)=='\r') {
                        //}
                        oldend = oldend + 4;
                    }
                }
        }
        oldend = j+7;
            }
        if(doFilter) {
            codeBuf.append(input.substring(oldend,input.length()));
        }
            return codeBuf.toString();
        }
    }

    private final int countLines(String text) {
        int lineCount = 0;
        BufferedReader reader = new BufferedReader(new StringReader(text));
        try {
            while(reader.readLine() != null) {
                lineCount++;
            }
        }
        catch(IOException ioe) {
            ioe.printStackTrace();
        }
        return lineCount;
    }

    private final String deleteCarriages(String line) {
        char curr_char;
        int i=0;

        // lineCount = 0;  // reset the line count
        StringBuffer buf = new StringBuffer();
        while (i<line.length()) {
            curr_char = line.charAt(i);
            if (curr_char == '\r') {    // waste some cpu cycles
                ;
            }
/*          // for printing line numbers
            else if(curr_char == '\n') {
                buf.append(curr_char);
                lineCount++;
            }
*/
            else {
                buf.append(curr_char);
            }
            i++;
        }
        return buf.toString();
    }
}