| /* |
| * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.javadoc.internal.doclets.formats.html.markup; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| |
| import jdk.javadoc.internal.doclets.toolkit.Content; |
| import jdk.javadoc.internal.doclets.toolkit.util.DocletConstants; |
| |
| /** |
| * A builder for HTML script elements. |
| * |
| * <p><b>This is NOT part of any supported API. |
| * If you write code that depends on this, you do so at your own risk. |
| * This code and its internal interfaces are subject to change or |
| * deletion without notice.</b> |
| */ |
| public class Script { |
| private final StringBuilder sb; |
| |
| /** |
| * Creates an empty script. |
| */ |
| public Script() { |
| sb = new StringBuilder(); |
| } |
| |
| /** |
| * Creates a new script containing the specified code. |
| * |
| * @param code the code |
| */ |
| public Script(String code) { |
| this(); |
| append(code); |
| } |
| |
| /** |
| * Appends the given code to the script. |
| * |
| * @param code the code |
| * @return this object |
| */ |
| public Script append(CharSequence code) { |
| sb.append(code); |
| return this; |
| } |
| |
| /** |
| * Appends the given text as a string constant to the string. |
| * Characters within the string will be escaped as needed. |
| * |
| * @param text the text |
| * @return this object |
| */ |
| public Script appendStringLiteral(CharSequence text) { |
| sb.append(stringLiteral(text, '"')); |
| return this; |
| } |
| |
| /** |
| * Appends the given text as a string constant to the string. |
| * Characters within the string will be escaped as needed. |
| * |
| * @param text the text |
| * @param quoteChar the quote character to use |
| * @return this object |
| */ |
| // The ability to specify the quote character is for backwards |
| // compatibility. Ideally, we should simplify the code so that |
| // the same quote character is always used. |
| public Script appendStringLiteral(CharSequence text, char quoteChar) { |
| sb.append(stringLiteral(text, quoteChar)); |
| return this; |
| } |
| |
| /** |
| * Returns a "live" view of the script as a {@code Content} object. |
| * Any later modifications to the script will be reflected in the |
| * object that is returned. |
| * @return the script, as a {@code Content} object. |
| */ |
| public Content asContent() { |
| ScriptContent scriptContent = new ScriptContent(sb); |
| HtmlTree tree = new HtmlTree(HtmlTag.SCRIPT) { |
| @Override |
| public void addContent(CharSequence s) { |
| throw new UnsupportedOperationException(); |
| } |
| @Override |
| public void addContent(Content c) { |
| if (c != scriptContent) { |
| throw new IllegalArgumentException(); |
| } |
| super.addContent(scriptContent); |
| } |
| }; |
| tree.addAttr(HtmlAttr.TYPE, "text/javascript"); |
| tree.addContent(scriptContent); |
| return tree; |
| } |
| |
| /** |
| * Returns a JavaScript string literal containing a specified string, |
| * escaping the characters of that string as needed. |
| * |
| * @param s the string |
| * @return a string literal containing the string |
| */ |
| public static String stringLiteral(CharSequence s) { |
| return stringLiteral(s, '"'); |
| } |
| |
| /** |
| * Returns a JavaScript string literal containing a specified string, |
| * escaping the characters of that string as needed. |
| * |
| * @param s the string |
| * @param quoteChar the quote character to use for the literal |
| * @return a string literal containing the string |
| */ |
| // The ability to specify the quote character is for backwards |
| // compatibility. Ideally, we should simplify the code so that |
| // the same quote character is always used. |
| public static String stringLiteral(CharSequence s, char quoteChar) { |
| if (quoteChar != '"' && quoteChar != '\'') { |
| throw new IllegalArgumentException(); |
| } |
| StringBuilder sb = new StringBuilder(); |
| sb.append(quoteChar); |
| for (int i = 0; i < s.length(); i++) { |
| char ch = s.charAt(i); |
| switch (ch) { |
| case '\b': |
| sb.append("\\b"); |
| break; |
| case '\t': |
| sb.append("\\t"); |
| break; |
| case '\n': |
| sb.append("\\n"); |
| break; |
| case '\f': |
| sb.append("\\f"); |
| break; |
| case '\r': |
| sb.append("\\r"); |
| break; |
| case '"': |
| sb.append("\\\""); |
| break; |
| case '\'': |
| sb.append("\\\'"); |
| break; |
| case '\\': |
| sb.append("\\\\"); |
| break; |
| default: |
| if (ch < 32 || ch >= 127) { |
| sb.append(String.format("\\u%04X", (int)ch)); |
| } else { |
| sb.append(ch); |
| } |
| break; |
| } |
| } |
| sb.append(quoteChar); |
| return sb.toString(); |
| } |
| |
| private static class ScriptContent extends Content { |
| private final StringBuilder sb; |
| |
| ScriptContent(StringBuilder sb) { |
| this.sb = sb; |
| } |
| |
| @Override |
| public void addContent(Content content) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void addContent(CharSequence code) { |
| sb.append(code); |
| } |
| |
| @Override |
| public boolean write(Writer writer, boolean atNewline) throws IOException { |
| String s = sb.toString(); |
| writer.write(s.replace("\n", DocletConstants.NL)); |
| return s.endsWith("\n"); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return false; |
| } |
| } |
| } |