content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2001-2004 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.
   */
  /*
   * $Id: Text.java,v 1.2.4.1 2005/09/12 11:33:09 pvedula Exp $
   */
  
  package jaxp.sun.org.apache.xalan.internal.xsltc.compiler;
  
  import jaxp.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
  import jaxp.sun.org.apache.bcel.internal.generic.GETSTATIC;
  import jaxp.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
  import jaxp.sun.org.apache.bcel.internal.generic.InstructionList;
  import jaxp.sun.org.apache.bcel.internal.generic.PUSH;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
  import jaxp.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
  
  /**
   * @author Jacek Ambroziak
   * @author Santiago Pericas-Geertsen
   * @author Morten Jorgensen
   */
  final class Text extends Instruction {
  
      private String _text;
      private boolean _escaping = true;
      private boolean _ignore = false;
      private boolean _textElement = false;
  
      /**
       * Create a blank Text syntax tree node.
       */
      public Text() {
          _textElement = true;
      }
  
      /**
       * Create text syntax tree node.
       * @param text is the text to put in the node.
       */
      public Text(String text) {
          _text = text;
      }
  
      /**
       * Returns the text wrapped inside this node
       * @return The text wrapped inside this node
       */
      protected String getText() {
          return _text;
      }
  
      /**
       * Set the text for this node. Appends the given text to any already
       * existing text (using string concatenation, so use only when needed).
       * @param text is the text to wrap inside this node.
       */
      protected void setText(String text) {
          if (_text == null)
              _text = text;
          else
              _text = _text + text;
      }
  
      public void display(int indent) {
          indent(indent);
          Util.println("Text");
          indent(indent + IndentIncrement);
          Util.println(_text);
      }
  
      public void parseContents(Parser parser) {
          final String str = getAttribute("disable-output-escaping");
          if ((str != null) && (str.equals("yes"))) _escaping = false;
  
          parseChildren(parser);
  
          if (_text == null) {
              if (_textElement) {
                  _text = EMPTYSTRING;
              }
              else {
                  _ignore = true;
              }
          }
          else if (_textElement) {
              if (_text.length() == 0) _ignore = true;
          }
          else if (getParent() instanceof LiteralElement) {
              LiteralElement element = (LiteralElement)getParent();
              String space = element.getAttribute("xml:space");
              if ((space == null) || (!space.equals("preserve")))
          {
              int i;
              final int textLength = _text.length();
              for (i = 0; i < textLength; i++) {
                  char c = _text.charAt(i);
                  if (!isWhitespace(c))
                      break;
              }
              if (i == textLength)
                  _ignore = true;
          }
          }
          else {
          int i;
          final int textLength = _text.length();
          for (i = 0; i < textLength; i++)
          {
              char c = _text.charAt(i);
              if (!isWhitespace(c))
                  break;
          }
          if (i == textLength)
              _ignore = true;
          }
      }
  
      public void ignore() {
          _ignore = true;
      }
  
      public boolean isIgnore() {
          return _ignore;
      }
  
      public boolean isTextElement() {
          return _textElement;
      }
  
      protected boolean contextDependent() {
          return false;
      }
  
      private static boolean isWhitespace(char c)
      {
          return (c == 0x20 || c == 0x09 || c == 0x0A || c == 0x0D);
      }
  
      public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
          final ConstantPoolGen cpg = classGen.getConstantPool();
          final InstructionList il = methodGen.getInstructionList();
  
          if (!_ignore) {
              // Turn off character escaping if so is wanted.
              final int esc = cpg.addInterfaceMethodref(OUTPUT_HANDLER,
                                                        "setEscaping", "(Z)Z");
              if (!_escaping) {
                  il.append(methodGen.loadHandler());
                  il.append(new PUSH(cpg, false));
                  il.append(new INVOKEINTERFACE(esc, 2));
              }
  
              il.append(methodGen.loadHandler());
  
              // Call characters(String) or characters(char[],int,int), as
              // appropriate.
              if (!canLoadAsArrayOffsetLength()) {
                  final int characters = cpg.addInterfaceMethodref(OUTPUT_HANDLER,
                                                             "characters",
                                                             "("+STRING_SIG+")V");
                  il.append(new PUSH(cpg, _text));
                  il.append(new INVOKEINTERFACE(characters, 2));
              } else {
                  final int characters = cpg.addInterfaceMethodref(OUTPUT_HANDLER,
                                                                   "characters",
                                                                   "([CII)V");
                  loadAsArrayOffsetLength(classGen, methodGen);
                  il.append(new INVOKEINTERFACE(characters, 4));
              }
  
              // Restore character escaping setting to whatever it was.
              // Note: setEscaping(bool) returns the original (old) value
              if (!_escaping) {
                  il.append(methodGen.loadHandler());
                  il.append(SWAP);
                  il.append(new INVOKEINTERFACE(esc, 2));
                  il.append(POP);
              }
          }
          translateContents(classGen, methodGen);
      }
  
      /**
       * Check whether this Text node can be stored in a char[] in the translet.
       * Calling this is precondition to calling loadAsArrayOffsetLength.
       * @see #loadAsArrayOffsetLength(ClassGenerator,MethodGenerator)
       * @return true if this Text node can be
       */
      public boolean canLoadAsArrayOffsetLength() {
          // Magic number!  21845*3 == 65535.  BCEL uses a DataOutputStream to
          // serialize class files.  The Java run-time places a limit on the size
          // of String data written using a DataOutputStream - it cannot require
          // more than 64KB when represented as UTF-8.  The number of bytes
          // required to represent a Java string as UTF-8 cannot be greater
          // than three times the number of char's in the string, hence the
          // check for 21845.
  
          return (_text.length() <= 21845);
      }
  
      /**
       * Generates code that loads the array that will contain the character
       * data represented by this Text node, followed by the offset of the
       * data from the start of the array, and then the length of the data.
       *
       * The pre-condition to calling this method is that
       * canLoadAsArrayOffsetLength() returns true.
       * @see #canLoadArrayOffsetLength()
       */
      public void loadAsArrayOffsetLength(ClassGenerator classGen,
                                          MethodGenerator methodGen) {
          final ConstantPoolGen cpg = classGen.getConstantPool();
          final InstructionList il = methodGen.getInstructionList();
          final XSLTC xsltc = classGen.getParser().getXSLTC();
  
          // The XSLTC object keeps track of character data
          // that is to be stored in char arrays.
          final int offset = xsltc.addCharacterData(_text);
          final int length = _text.length();
          String charDataFieldName =
              STATIC_CHAR_DATA_FIELD + (xsltc.getCharacterDataCount()-1);
  
          il.append(new GETSTATIC(cpg.addFieldref(xsltc.getClassName(),
                                         charDataFieldName,
                                         STATIC_CHAR_DATA_FIELD_SIG)));
          il.append(new PUSH(cpg, offset));
          il.append(new PUSH(cpg, _text.length()));
      }
  }
  