| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * 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. |
| */ |
| package org.apache.jasper.compiler; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| |
| /** |
| * This is what is used to generate servlets. |
| * |
| * @author Anil K. Vijendran |
| * @author Kin-man Chung |
| */ |
| public class ServletWriter { |
| public static int TAB_WIDTH = 2; |
| public static String SPACES = " "; |
| |
| // Current indent level: |
| private int indent = 0; |
| private int virtual_indent = 0; |
| |
| // The sink writer: |
| PrintWriter writer; |
| |
| // servlet line numbers start from 1 |
| private int javaLine = 1; |
| |
| |
| public ServletWriter(PrintWriter writer) { |
| this.writer = writer; |
| } |
| |
| public void close() throws IOException { |
| writer.close(); |
| } |
| |
| |
| // -------------------- Access informations -------------------- |
| |
| public int getJavaLine() { |
| return javaLine; |
| } |
| |
| |
| // -------------------- Formatting -------------------- |
| |
| public void pushIndent() { |
| virtual_indent += TAB_WIDTH; |
| if (virtual_indent >= 0 && virtual_indent <= SPACES.length()) |
| indent = virtual_indent; |
| } |
| |
| public void popIndent() { |
| virtual_indent -= TAB_WIDTH; |
| if (virtual_indent >= 0 && virtual_indent <= SPACES.length()) |
| indent = virtual_indent; |
| } |
| |
| /** |
| * Print a standard comment for echo outputed chunk. |
| * @param start The starting position of the JSP chunk being processed. |
| * @param stop The ending position of the JSP chunk being processed. |
| */ |
| public void printComment(Mark start, Mark stop, char[] chars) { |
| if (start != null && stop != null) { |
| println("// from="+start); |
| println("// to="+stop); |
| } |
| |
| if (chars != null) |
| for(int i = 0; i < chars.length;) { |
| printin(); |
| print("// "); |
| while (chars[i] != '\n' && i < chars.length) |
| writer.print(chars[i++]); |
| } |
| } |
| |
| /** |
| * Prints the given string followed by '\n' |
| */ |
| public void println(String s) { |
| javaLine++; |
| writer.println(s); |
| } |
| |
| /** |
| * Prints a '\n' |
| */ |
| public void println() { |
| javaLine++; |
| writer.println(""); |
| } |
| |
| /** |
| * Prints the current indention |
| */ |
| public void printin() { |
| writer.print(SPACES.substring(0, indent)); |
| } |
| |
| /** |
| * Prints the current indention, followed by the given string |
| */ |
| public void printin(String s) { |
| writer.print(SPACES.substring(0, indent)); |
| writer.print(s); |
| } |
| |
| /** |
| * Prints the current indention, and then the string, and a '\n'. |
| */ |
| public void printil(String s) { |
| javaLine++; |
| writer.print(SPACES.substring(0, indent)); |
| writer.println(s); |
| } |
| |
| /** |
| * Prints the given char. |
| * |
| * Use println() to print a '\n'. |
| */ |
| public void print(char c) { |
| writer.print(c); |
| } |
| |
| /** |
| * Prints the given int. |
| */ |
| public void print(int i) { |
| writer.print(i); |
| } |
| |
| /** |
| * Prints the given string. |
| * |
| * The string must not contain any '\n', otherwise the line count will be |
| * off. |
| */ |
| public void print(String s) { |
| writer.print(s); |
| } |
| |
| /** |
| * Prints the given string. |
| * |
| * If the string spans multiple lines, the line count will be adjusted |
| * accordingly. |
| */ |
| public void printMultiLn(String s) { |
| int index = 0; |
| |
| // look for hidden newlines inside strings |
| while ((index=s.indexOf('\n',index)) > -1 ) { |
| javaLine++; |
| index++; |
| } |
| |
| writer.print(s); |
| } |
| } |