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ANNIE is a general purpose information extraction system that
provides the building blocks of many other GATE applications.
package gate.gui.jape;
import java.awt.BorderLayout;
import java.awt.Color;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.JTree;
import javax.swing.SwingUtilities;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeSelectionModel;
import gate.LanguageAnalyser;
import gate.Resource;
import gate.creole.ANNIEConstants;
import gate.creole.AbstractProcessingResource;
import gate.creole.AbstractVisualResource;
import gate.creole.ResourceInstantiationException;
import gate.creole.ResourceReference;
import gate.creole.metadata.CreoleResource;
import gate.creole.metadata.GuiType;
import gate.event.ProgressListener;
import gate.jape.parser.ParseCpslConstants;
import gate.jape.parser.ParseCpslTokenManager;
import gate.jape.parser.SimpleCharStream;
import gate.jape.parser.Token;
import gate.util.BomStrippingInputStreamReader;
import gate.util.GateRuntimeException;
/**
* A JAPE viewer that allows access to all phases of the grammar and
* provides syntax highlighting. Future versions may allow editing and
* reload of JAPE files.
*
* @author Mark A. Greenwood
*/
@CreoleResource(name="Jape Viewer", comment="A JAPE grammar file viewer", helpURL="http://gate.ac.uk/userguide/chap:jape", guiType=GuiType.LARGE, mainViewer=true, resourceDisplayed="gate.creole.Transducer")
public class JapeViewer extends AbstractVisualResource implements
ANNIEConstants,
ProgressListener {
private static final long serialVersionUID = -6026605466406110590L;
/**
* The text area where the JAPE source will be displayed
*/
private JTextPane textArea;
/**
* The tree in which the phases of the grammar will be shown
*/
private JTree treePhases;
private JScrollPane treeScroll;
/**
* A flag so we can know if we are currently reading a highlighting a
* JAPE source file
*/
private boolean updating = false;
/**
* The JAPE transducer for which we need to show the JAPE source
*/
private LanguageAnalyser transducer;
/**
* A map that associates the syntactic elements of JAPE files with a
* colour for performing syntax highlighting
*/
private Map colorMap = new HashMap();
/**
* The default style used by the text area. This is used so that we
* can ensure that normal text is displayed normally. This fixes a
* problem where sometime the highlighting goes screwy and shows
* everything as a comment.
*/
private Style defaultStyle;
@Override
public Resource init() {
initGuiComponents();
return this;
}
private void initGuiComponents() {
setLayout(new BorderLayout());
textArea = new JTextPane();
textArea.setEditable(false);
JScrollPane textScroll = new JScrollPane(textArea,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
add(textScroll, BorderLayout.CENTER);
treePhases = new JTree();
treeScroll = new JScrollPane(treePhases,
JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
add(treeScroll, BorderLayout.WEST);
treePhases.getSelectionModel().setSelectionMode(
TreeSelectionModel.SINGLE_TREE_SELECTION);
treePhases.addTreeSelectionListener(new TreeSelectionListener() {
@Override
public void valueChanged(TreeSelectionEvent e) {
if(updating) return;
if(e.getPath().getLastPathComponent() == null) return;
try {
readJAPEFileContents(new URL(((ResourceReference)transducer.getParameterValue("grammarURL")).toURL(), e.getPath()
.getLastPathComponent()
+ ".jape"));
}
catch(IOException | ResourceInstantiationException ioe) {
ioe.printStackTrace();
}
}
});
// if we want to set the jape to be monospaced (like most code
// editors) then
// do this...
/*
* MutableAttributeSet attrs = textArea.getInputAttributes();
* StyleConstants.setFontFamily(attrs, "monospaced"); StyledDocument
* doc = textArea.getStyledDocument(); doc.setCharacterAttributes(0,
* doc.getLength() + 1, attrs, false);
*/
defaultStyle = textArea.addStyle("default", null);
Style style = textArea.addStyle("brackets", null);
StyleConstants.setForeground(style, Color.red);
colorMap.put(ParseCpslConstants.leftBrace, style);
colorMap.put(ParseCpslConstants.rightBrace, style);
colorMap.put(ParseCpslConstants.leftBracket, style);
colorMap.put(ParseCpslConstants.rightBracket, style);
colorMap.put(ParseCpslConstants.leftSquare, style);
colorMap.put(ParseCpslConstants.rightSquare, style);
style = textArea.addStyle("keywords", null);
StyleConstants.setForeground(style, Color.blue);
colorMap.put(ParseCpslConstants.rule, style);
colorMap.put(ParseCpslConstants.priority, style);
colorMap.put(ParseCpslConstants.macro, style);
colorMap.put(ParseCpslConstants.bool, style);
colorMap.put(ParseCpslConstants.phase, style);
colorMap.put(ParseCpslConstants.input, style);
colorMap.put(ParseCpslConstants.option, style);
colorMap.put(ParseCpslConstants.multiphase, style);
colorMap.put(ParseCpslConstants.phases, style);
style = textArea.addStyle("strings", null);
StyleConstants.setForeground(style, new Color(0, 128, 128));
colorMap.put(ParseCpslConstants.string, style);
style = textArea.addStyle("comments", null);
StyleConstants.setForeground(style, new Color(0, 128, 0));
colorMap.put(ParseCpslConstants.singleLineCStyleComment, style);
colorMap.put(ParseCpslConstants.singleLineCpslStyleComment, style);
colorMap.put(ParseCpslConstants.commentStart, style);
colorMap.put(ParseCpslConstants.commentChars, style);
colorMap.put(ParseCpslConstants.commentEnd, style);
colorMap.put(ParseCpslConstants.phasesSingleLineCStyleComment, style);
colorMap.put(ParseCpslConstants.phasesSingleLineCpslStyleComment, style);
colorMap.put(ParseCpslConstants.phasesCommentStart, style);
colorMap.put(ParseCpslConstants.phasesCommentChars, style);
colorMap.put(ParseCpslConstants.phasesCommentEnd, style);
}
@Override
public void setTarget(final Object target) {
if(target == null) {
throw new NullPointerException("JAPE viewer received a null target");
}
// check that the target is one we can work with - it needs to be a
// LanguageAnalyser that has grammarURL and encoding parameters.
boolean targetOK = true;
if(target instanceof LanguageAnalyser) {
try {
((LanguageAnalyser)target).getParameterValue("grammarURL");
((LanguageAnalyser)target).getParameterValue("encoding");
} catch(ResourceInstantiationException rie) {
targetOK = false;
}
} else {
targetOK = false;
}
if(!targetOK) {
throw new IllegalArgumentException(
"The GATE jape viewer can only be used with a GATE jape transducer!\n"
+ target.getClass().toString()
+ " is not a GATE Jape Transducer!");
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
if(transducer != null && transducer instanceof AbstractProcessingResource) {
((AbstractProcessingResource)transducer).removeProgressListener(JapeViewer.this);
}
transducer = (LanguageAnalyser)target;
URL japeFileURL = null;
try {
japeFileURL = ((ResourceReference)transducer.getParameterValue("grammarURL")).toURL();
}
catch (ResourceInstantiationException | IOException rie) {
//ignore this for now and let the null catch take over
rie.printStackTrace();
}
if(japeFileURL == null) {
textArea.setText("The source for this JAPE grammar is not available!");
remove(treeScroll);
return;
}
String japePhaseName = japeFileURL.getFile();
japePhaseName = japePhaseName.substring(japePhaseName.lastIndexOf("/") + 1,
japePhaseName.length() - 5);
treePhases.setModel(new DefaultTreeModel(new DefaultMutableTreeNode(
japePhaseName)));
treePhases.setSelectionRow(0);
readJAPEFileContents(japeFileURL);
if(transducer instanceof AbstractProcessingResource) {
((AbstractProcessingResource)transducer).addProgressListener(JapeViewer.this);
}
}
});
}
private void readJAPEFileContents(URL url) {
if(treePhases.getLastSelectedPathComponent() == null) return;
updating = true;
try {
Reader japeReader = null;
String encoding = (String)transducer.getParameterValue("encoding");
if(encoding == null) {
japeReader = new BomStrippingInputStreamReader(url.openStream());
}
else {
japeReader = new BomStrippingInputStreamReader(url.openStream(), encoding);
}
BufferedReader br = new BufferedReader(japeReader);
String content = br.readLine();
StringBuilder japeFileContents = new StringBuilder();
List lineOffsets = new ArrayList();
while(content != null) {
lineOffsets.add(japeFileContents.length());
// replace tabs with spaces otherwise the highlighting fails
// TODO work out why this is needed and fix it properly
japeFileContents.append(content.replaceAll("\t", " ")).append("\n");
content = br.readLine();
}
textArea.setText(japeFileContents.toString());
textArea.updateUI();
br.close();
ParseCpslTokenManager tokenManager = new ParseCpslTokenManager(
new SimpleCharStream(
new StringReader(japeFileContents.toString())));
StyledDocument doc = textArea.getStyledDocument();
doc.setCharacterAttributes(0, japeFileContents.length(), defaultStyle,
true);
((DefaultMutableTreeNode)treePhases.getSelectionPath()
.getLastPathComponent()).removeAllChildren();
Token t;
while((t = tokenManager.getNextToken()).kind != 0) {
Token special = t.specialToken;
while(special != null) {
Style style = colorMap.get(special.kind);
if(style != null) {
int start = lineOffsets.get(special.beginLine - 1)
+ special.beginColumn - 1;
int end = lineOffsets.get(special.endLine - 1) + special.endColumn
- 1;
doc.setCharacterAttributes(start, end - start + 1, style, true);
}
special = special.specialToken;
}
Style style = colorMap.get(t.kind);
if(style != null) {
int start = lineOffsets.get(t.beginLine - 1) + t.beginColumn - 1;
int end = lineOffsets.get(t.endLine - 1) + t.endColumn - 1;
doc.setCharacterAttributes(start, end - start + 1, style, true);
}
if(t.kind == ParseCpslConstants.path) {
((DefaultMutableTreeNode)treePhases.getSelectionPath()
.getLastPathComponent()).add(new DefaultMutableTreeNode(t
.toString()));
}
}
}
catch(IOException ioe) {
throw new GateRuntimeException(ioe);
} catch(ResourceInstantiationException rie) {
throw new GateRuntimeException(rie);
}
if(treePhases.getSelectionRows() != null
&& treePhases.getSelectionRows().length > 0)
treePhases.expandRow(treePhases.getSelectionRows()[0]);
updating = false;
}
@Override
public void processFinished() {
setTarget(transducer);
}
@Override
public void progressChanged(int progress) {
}
}