/plugins/XInsert/tags/release-2_5/src/InsertTextCommand.java

/*

 * InsertTextCommand.java

 * Copyright (C) 2001 Dominic Stolerman

 * dstolerman@jedit.org

 *

 * This program 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 2

 * of the License, or any later version.

 *

 * This program 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 this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */





/**

*@author Dominic Stolerman

*/



import org.gjt.sp.jedit.*;

import org.gjt.sp.jedit.textarea.JEditTextArea;

import org.gjt.sp.util.Log;



public class InsertTextCommand extends java.lang.Object implements Command {



  public static void insertText(String text, ScriptContext context) {

    InsertTextCommand cmd = new InsertTextCommand(text);

    cmd.run(context);

    }



  /* constructor */

  public InsertTextCommand(String text) {

    this.text = text;

    // this.src = MiscUtilities.escapesToChars(text);

    this.src = text;

    this.result = new StringBuffer(src.length());

    this.i = 0;

    }



  public void run(ScriptContext context) {

    XTreeNode node = context.getNode();

    View view = context.getView();

    JEditTextArea textarea = view.getTextArea();

    Buffer buffer = view.getBuffer();

    int tabSize = buffer.getTabSize();



    char c;

    boolean braced;

    int caretpos = -1;



    for (i = 0; i < src.length(); i++) {

      c = src.charAt(i);

      switch(c) {

      case '|':

        // double '|'

        if(nextCharIs('|')) {

            i++;

            result.append(c);

            }

        // insert selection

        else {

            result.append(context.getSelection());

            caretpos = result.length();

            }

        // pos = j;

        break;

      case '\\':

        // new line

        if(nextCharIs('n')) {

           i++;

           result.append('\n');

           }

        // tab

        else if(nextCharIs('t')) {

           i++;

           if(jEdit.getBooleanProperty("buffer.noTabs", false))

             for(int k = 0; k < tabSize; k++)

               result.append(" ");

           else

             result.append("\t");

             }

        // escaped dollar sign

        else if(nextCharIs('$')) {

           i++;

           result.append('$');

           }

        // escaped pipe

        else if(nextCharIs('|')) {

           i++;

           result.append('|');

           }

        // escaped backslash

        else if(nextCharIs('\\')) {

           i++;

           result.append(c);

           }

	    else

           result.append(c);

        break;

        // insert variable

      case '$':

	        braced = nextCharIs('{');

            // insertText ${varname}

	        if(braced) i++;

            i++;

            int temp = i;

            while(i < src.length() && Character.isLetterOrDigit(src.charAt(i)))

              i++;

            // Log.log(Log.DEBUG, this, "$ = " + src.substring(temp, i));

            String val = XScripter.getSubstituteFor(view, src.substring(temp, i), node);

            if(val == null)

              result.append(src.substring(temp, i));

            else

              result.append(val);

            if(!braced) i--;

        break;

      default:

        result.append(c);

        break;

      }

    }

    if(jEdit.getBooleanProperty("xtree.carriage", false))

      result.append('\n');

    int caret = textarea.getCaretPosition();

    int len = result.length();

    if(len > 0) {

      textarea.setSelectedText(result.toString());

      // set caret to end of insert or last "|" position

      textarea.setCaretPosition(caretpos > -1

	      ? caret + caretpos

	      : caret + len

	      );

      }

    }



  // enhances source readability

  private boolean nextCharIs(char ch) {

      return (i < src.length() - 1) && (src.charAt(i + 1) == ch);

      }



  private int i;

  private String text;

  private String src;

  private StringBuffer result;

}