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package com.intellij.structuralsearch.plugin.ui;
import com.intellij.codeInsight.hint.TooltipController;
import com.intellij.codeInsight.template.impl.TemplateImplUtil;
import com.intellij.codeInsight.template.impl.Variable;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.LogicalPosition;
import com.intellij.openapi.editor.event.*;
import com.intellij.openapi.util.Key;
import org.jetbrains.annotations.NotNull;
import java.util.ArrayList;
/**
* Created by IntelliJ IDEA.
* User: Maxim.Mossienko
* Date: Apr 23, 2004
* Time: 5:20:56 PM
* To change this template use File | Settings | File Templates.
*/
public class SubstitutionShortInfoHandler implements DocumentListener, EditorMouseMotionListener, CaretListener {
private long modificationTimeStamp;
private final ArrayList<Variable> variables = new ArrayList<Variable>();
private final Editor editor;
public static final Key<Configuration> CURRENT_CONFIGURATION_KEY = Key.create("SS.CurrentConfiguration");
SubstitutionShortInfoHandler(@NotNull Editor _editor) {
editor = _editor;
}
public void beforeDocumentChange(DocumentEvent event) {
}
public void documentChanged(DocumentEvent event) {
}
public void mouseMoved(EditorMouseEvent e) {
LogicalPosition position = editor.xyToLogicalPosition( e.getMouseEvent().getPoint() );
handleInputFocusMovement(position);
}
private void handleInputFocusMovement(LogicalPosition position) {
checkModelValidity();
String text = "";
final int offset = editor.logicalPositionToOffset(position);
final int length = editor.getDocument().getTextLength();
final CharSequence elements = editor.getDocument().getCharsSequence();
int start = offset-1;
int end = -1;
while(start >=0 && Character.isJavaIdentifierPart(elements.charAt(start)) && elements.charAt(start)!='$') start--;
if (start >=0 && elements.charAt(start)=='$') {
end = offset;
while(end < length && Character.isJavaIdentifierPart(elements.charAt(end)) && elements.charAt(end)!='$') end++;
if (end < length && elements.charAt(end)=='$') {
String varname = elements.subSequence(start + 1, end).toString();
Variable foundVar = null;
for (final Variable var : variables) {
if (var.getName().equals(varname)) {
foundVar = var;
break;
}
}
if (foundVar!=null) {
text = UIUtil.getShortParamString(editor.getUserData(CURRENT_CONFIGURATION_KEY),varname);
}
}
}
if (text.length() > 0) {
UIUtil.showTooltip(editor, start, end + 1, text);
}
else {
TooltipController.getInstance().cancelTooltips();
}
}
private void checkModelValidity() {
Document document = editor.getDocument();
if (modificationTimeStamp != document.getModificationStamp()) {
variables.clear();
variables.addAll(TemplateImplUtil.parseVariables(document.getCharsSequence()).values());
modificationTimeStamp = document.getModificationStamp();
}
}
public void mouseDragged(EditorMouseEvent e) {
}
public void caretPositionChanged(CaretEvent e) {
handleInputFocusMovement(e.getNewPosition());
}
@Override
public void caretAdded(CaretEvent e) {
}
@Override
public void caretRemoved(CaretEvent e) {
}
public ArrayList<Variable> getVariables() {
checkModelValidity();
return variables;
}
}
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