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/*******************************************************************************
* Copyright (c) 2000, 2007 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.fx.text.ui.contentassist;
import static com.sun.javafx.PlatformUtil.isMac;
import java.util.Collections;
import java.util.List;
import java.util.function.Function;
import javafx.application.Platform;
import javafx.collections.FXCollections;
import javafx.geometry.Point2D;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.ListView;
import javafx.scene.control.PopupControl;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.BorderPane;
import javafx.stage.PopupWindow;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import org.eclipse.fx.text.ui.ITextViewer;
import org.eclipse.fx.ui.controls.list.SimpleListCell;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
public class ContentProposalPopup {
private ITextViewer viewer;
private PopupWindow stage;
private ListView<ICompletionProposal> proposalList;
private String prefix;
private int offset;
private Function<Integer, List<ICompletionProposal>> proposalComputer;
public ContentProposalPopup(ITextViewer viewer, Function<Integer, List<ICompletionProposal>> proposalComputer) {
this.viewer = viewer;
this.proposalComputer = proposalComputer;
}
public void displayProposals(List<ICompletionProposal> proposalList, int offset, Point2D position) {
setup();
this.prefix = "";
this.offset = offset;
this.proposalList.setItems(FXCollections.observableArrayList(proposalList));
this.proposalList.getSelectionModel().select(0);
this.stage.setX(position.getX());
this.stage.setY(position.getY());
this.stage.setWidth(300);
this.stage.setHeight(200);
this.stage.show(viewer.getTextWidget().getScene().getWindow());
this.stage.requestFocus();
}
private void handleKeyTyped(KeyEvent event) {
if( event.getCharacter().length() == 0 ) {
return;
}
String character = event.getCharacter();
if( character.length() == 0 ) {
return;
}
if (event.isControlDown() || event.isAltDown() || (isMac() && event.isMetaDown())) {
if (!((event.isControlDown() || isMac()) && event.isAltDown())) {
return;
}
}
if (character.charAt(0) > 0x1F
&& character.charAt(0) != 0x7F ) {
// try {
this.prefix = this.prefix+character;
// viewer.getDocument().replace(offset, 0, character);
this.offset += event.getCharacter().length();
// viewer.getTextWidget().setCaretOffset(offset);
updateProposals();
// } catch (BadLocationException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
}
}
private void updateProposals() {
List<ICompletionProposal> list = proposalComputer.apply(offset);
if( ! list.isEmpty() ) {
proposalList.setItems(FXCollections.observableArrayList(list));
proposalList.scrollTo(0);
proposalList.getSelectionModel().select(0);
} else {
stage.hide();
}
}
private void handleKeyPressed(KeyEvent event) {
if( event.getCode() == KeyCode.ESCAPE ) {
event.consume();
stage.hide();
} else if( event.getCode() == KeyCode.BACK_SPACE ) {
event.consume();
this.offset -= 1;
try {
this.viewer.getDocument().replace(offset, 1, "");
viewer.getTextWidget().setCaretOffset(offset);
updateProposals();
} catch (BadLocationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else if( event.getCode() == KeyCode.ENTER ) {
event.consume();
applySelection();
} else if( event.getCode() == KeyCode.LEFT ) {
event.consume();
this.offset -= 1;
this.offset = Math.max(0, this.offset);
viewer.getTextWidget().setCaretOffset(offset);
updateProposals();
} else if( event.getCode() == KeyCode.RIGHT ) {
event.consume();
this.offset += 1;
this.offset = Math.min(viewer.getDocument().getLength()-1, this.offset);
viewer.getTextWidget().setCaretOffset(offset);
updateProposals();
}
}
private void applySelection() {
ICompletionProposal selectedItem = proposalList.getSelectionModel().getSelectedItem();
if( selectedItem != null ) {
IDocument document = viewer.getDocument();
selectedItem.apply(document);
viewer.getTextWidget().setSelection(selectedItem.getSelection(document));
stage.hide();
}
}
private void setup() {
if( stage == null ) {
stage = new PopupWindow() {
};
stage.setAutoFix(false);
stage.setWidth(300);
stage.setHeight(200);
BorderPane p = new BorderPane();
p.setPrefHeight(200);
p.setPrefWidth(400);
stage.getScene().addEventFilter(KeyEvent.KEY_TYPED, this::handleKeyTyped);
stage.getScene().addEventFilter(KeyEvent.KEY_PRESSED, this::handleKeyPressed);
stage.getScene().getStylesheets().addAll(viewer.getTextWidget().getScene().getStylesheets());
proposalList = new ListView<>();
proposalList.setOnMouseClicked((e) -> {
if(e.getClickCount() == 1) {
applySelection();
}
});
Function<ICompletionProposal, CharSequence> label = (c) -> c.getLabel();
Function<ICompletionProposal, Node> graphic = (c) -> c.getGraphic();
Function<ICompletionProposal, List<String>> css = (c) -> Collections.emptyList();
proposalList.setCellFactory((v) -> new SimpleListCell<ICompletionProposal>(label,graphic,css));
p.setCenter(proposalList);
stage.getScene().setRoot(p);
stage.focusedProperty().addListener((o) -> {
if( stage != null && ! stage.isFocused() ) {
Platform.runLater(stage::hide);
}
});
// Fix CSS warnings
stage.setOnHidden((o) -> {
stage = null;
});
}
}
}
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