66 lines
2.4 KiB
Java
66 lines
2.4 KiB
Java
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// StringEvaluationSource.java
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// FESI Copyright (c) Jean-Marc Lugrin, 1999
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package FESI.Interpreter;
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import java.util.StringTokenizer;
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/**
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* Describe a string used as a source. The string is trimmed
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* to its first significant characters during display.
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*/
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public class StringEvaluationSource extends EvaluationSource {
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private String theString;
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/**
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* Create a string source description
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* @param theString Describe the source
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* @param previousSource Describe the calling source
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*/
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public StringEvaluationSource(String theString, EvaluationSource previousSource) {
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super(previousSource);
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this.theString = theString;
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}
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protected String getEvaluationSourceText() {
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String displayString = new String("");
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// All this to print just first line of string...
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boolean firstLineFound = false;
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boolean moreLinesFound = false;
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StringTokenizer t = new StringTokenizer(theString, "\n\r");
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while (t.hasMoreTokens()) {
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String theLine = t.nextToken();
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if (theLine.equals("\n") || theLine.equals("\r")) continue;
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if (theLine.trim().length()>0) { // Skip any leading empty lines
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if (!firstLineFound) {
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displayString = theLine;
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firstLineFound = true;
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continue;
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}
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moreLinesFound = true;
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break;
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}
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}
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if (moreLinesFound) {
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return "in string starting with: '" + displayString + "'...";
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} else {
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return "in string: '" + displayString + "'";
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}
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}
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}
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