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bndtools.jareditor.internal.JARPrintPage Maven / Gradle / Ivy
package bndtools.jareditor.internal;
import java.net.URI;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StackLayout;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.forms.IManagedForm;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.forms.editor.FormPage;
import org.eclipse.ui.forms.widgets.Form;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.ui.forms.widgets.ScrolledForm;
import aQute.bnd.osgi.Jar;
import aQute.bnd.print.JarPrinter;
public class JARPrintPage extends FormPage {
public static final Image IMAGE_CLOSE = Plugin.getInstance()
.getImageRegistry()
.get(Plugin.IMG_CLOSE);
public static final Image IMAGE_NEXT = Plugin.getInstance()
.getImageRegistry()
.get(Plugin.IMG_NEXT);
public static final Image IMAGE_NEXT_DISABLED = Plugin.getInstance()
.getImageRegistry()
.get(Plugin.IMG_NEXT_DISABLED);
public static final Image IMAGE_PREVIOUS = Plugin.getInstance()
.getImageRegistry()
.get(Plugin.IMG_PREVIOUS);
public static final Image IMAGE_PREVIOUS_DISABLED = Plugin.getInstance()
.getImageRegistry()
.get(Plugin.IMG_PREVIOUS_DISABLED);
private StyledText styledText;
private URI uri;
private boolean loading;
private int highlightIndex = -1;
private IAction findAction;
private IAction nextAction;
private IAction previousAction;
public JARPrintPage(FormEditor formEditor, String id, String title) {
super(formEditor, id, title);
}
@Override
protected void createFormContent(IManagedForm managedForm) {
FormToolkit toolkit = managedForm.getToolkit();
ScrolledForm scrolledForm = managedForm.getForm();
Form form = scrolledForm.getForm();
Composite header = form.getHead();
header.setLayout(GridLayoutFactory.createFrom(new GridLayout(1, true))
.margins(0, 0)
.create());
Composite findParent = toolkit.createComposite(header, SWT.BORDER);
findParent.setLayout(GridLayoutFactory.createFrom(new GridLayout(6, false))
.margins(5, 5)
.create());
findParent.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
findParent.setBackgroundMode(SWT.INHERIT_FORCE);
addChangeListener(event -> {
if (event instanceof HighlightEvent)
findParent.layout(true);
});
toolkit.setBorderStyle(SWT.NULL);
Text findText = toolkit.createText(findParent, "", SWT.SINGLE);
findText.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
findText.setMessage("Find...");
findText.addModifyListener(e -> fireChangeEvent(new FindTextEvent(findText.getText())));
findText.addKeyListener(new KeyAdapter() {
@Override
public void keyReleased(KeyEvent e) {
if (e.character == 13) { // enter key
int numHighlights = styledText.getStyleRanges().length;
if (highlightIndex == numHighlights - 1) {
highlightIndex = -1; // loop back from beginning
}
nextAction.run();
}
}
});
addChangeListener(event -> {
if (event instanceof FindTextEvent)
highlightText((String) event.data);
});
Label highlightStatus = toolkit.createLabel(findParent, "");
highlightStatus.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, true));
addChangeListener(e -> {
if (e instanceof HighlightEvent) {
HighlightEvent event = (HighlightEvent) e;
String text = event.findText;
StyleRange[] highlights = event.highlights;
int index = event.index;
if (highlights.length > 0) {
highlightStatus.setText(MessageFormat.format("{0}/{1}", index + 1, highlights.length));
} else {
if (text.isEmpty()) {
highlightStatus.setText("");
} else {
highlightStatus.setText("0/0");
}
}
}
});
Label separator = toolkit.createSeparator(findParent, SWT.SEPARATOR);
GridData sepData = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
sepData.heightHint = findText.computeSize(SWT.DEFAULT, SWT.DEFAULT).y;
separator.setLayoutData(sepData);
Label nextButton = toolkit.createLabel(findParent, "", SWT.BORDER);
nextButton.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, true));
nextButton.setImage(IMAGE_NEXT_DISABLED);
nextButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseUp(MouseEvent e) {
nextAction.run();
}
});
addChangeListener(e -> {
if (e instanceof HighlightEvent) {
HighlightEvent event = (HighlightEvent) e;
Image image;
if (event.highlights.length > 0 && event.index < event.highlights.length - 1) {
image = IMAGE_NEXT;
} else {
image = IMAGE_NEXT_DISABLED;
}
nextButton.setImage(image);
}
});
Label previousButton = toolkit.createLabel(findParent, "", SWT.BORDER);
previousButton.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, true));
previousButton.setImage(IMAGE_PREVIOUS_DISABLED);
previousButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseUp(MouseEvent e) {
previousAction.run();
}
});
addChangeListener(e -> {
if (e instanceof HighlightEvent) {
HighlightEvent event = (HighlightEvent) e;
Image image;
if (event.highlights.length > 0 && event.index - 1 >= 0) {
image = IMAGE_PREVIOUS;
} else {
image = IMAGE_PREVIOUS_DISABLED;
}
previousButton.setImage(image);
}
});
Label closeButton = toolkit.createLabel(findParent, "", SWT.BORDER);
closeButton.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, true));
closeButton.setImage(IMAGE_CLOSE);
closeButton.addMouseListener(new MouseAdapter() {
@Override
public void mouseUp(MouseEvent e) {
form.setHeadClient(null);
// save off the old findText to use as default for next time
findText.setData(findText.getText());
findText.setText("");
styledText.setFocus();
form.layout();
}
});
Composite body = form.getBody();
StackLayout stackLayout = new StackLayout() {
@Override
protected Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) {
Point size = super.computeSize(composite, wHint, hHint, flushCache);
// hack to make sure styledText never grows outside of body
size.y = SWT.DEFAULT;
return size;
}
};
stackLayout.marginHeight = stackLayout.marginWidth = 5;
body.setLayout(stackLayout);
styledText = new StyledText(body, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.READ_ONLY);
stackLayout.topControl = styledText;
styledText.setEditable(false);
styledText.setFont(JFaceResources.getTextFont());
styledText.addModifyListener(e -> {
String find = findText.getText();
if (find.length() > 0)
highlightText(find);
});
findAction = new Action() {
@Override
public void run() {
form.setHeadClient(findParent);
if (findText.getData() instanceof String)
findText.setText((String) findText.getData());
findText.setFocus();
}
};
nextAction = new Action() {
@Override
public void run() {
StyleRange[] highlights = styledText.getStyleRanges();
if (highlights.length <= 1 || highlightIndex == highlights.length - 1)
return;
nextHighlight(findText.getText(), highlights);
}
};
previousAction = new Action() {
@Override
public void run() {
StyleRange[] highlights = styledText.getStyleRanges();
if (highlights.length <= 1 || highlightIndex == 0)
return;
previousHighlight(findText.getText(), highlights);
}
};
}
private void nextHighlight(String findText, StyleRange[] highlights) {
int next = highlightIndex == highlights.length - 1 ? highlightIndex : highlightIndex + 1;
revealRange(highlights, next);
fireChangeEvent(new HighlightEvent(findText, highlights, next));
}
private void previousHighlight(String findText, StyleRange[] highlights) {
int previous = highlightIndex == 0 ? 0 : highlightIndex - 1;
revealRange(highlights, previous);
fireChangeEvent(new HighlightEvent(findText, highlights, previous));
}
private void highlightText(String findText) {
String currentText = styledText.getText();
StyleRange[] currentHighlights = styledText.getStyleRanges();
List hits = findOccurances(currentText, findText);
Color highlightColor = styledText.getSelectionBackground();
StyleRange[] highlights = hits
.stream()
.map(hit -> new StyleRange(hit, findText.length(), null,
highlightColor))
.toArray(StyleRange[]::new);
styledText.setStyleRanges(highlights);
highlightIndex = -1;
if (highlights.length > 0) {
revealRange(highlights, 0);
fireChangeEvent(new HighlightEvent(findText, highlights, 0));
} else {
Arrays.stream(currentHighlights).forEach(range-> styledText.redrawRange(range.start, range.length, true));
fireChangeEvent(new HighlightEvent(findText, highlights, -1));
}
}
private void revealRange(StyleRange[] highlights, int index) {
Arrays.stream(highlights)
.forEach(range -> {
range.background = styledText.getSelectionBackground();
range.foreground = null;
styledText.redrawRange(range.start, range.length, true);
});
StyleRange currentRange = highlights[index];
currentRange.background = styledText.getForeground();
currentRange.foreground = styledText.getSelectionBackground();
styledText.setStyleRanges(highlights);
styledText.redrawRange(currentRange.start, currentRange.length, true);
Rectangle firstRangeBounds = styledText.getTextBounds(currentRange.start,
currentRange.start + currentRange.length);
int topLine = styledText.getLineAtOffset(currentRange.start);
int topLineOffset = styledText.getOffsetAtLine(topLine);
int lineOffset = currentRange.start - topLineOffset;
styledText.setSelection(currentRange.start, currentRange.start);
styledText.redraw();
highlightIndex = index;
}
private List findOccurances(String content, String findText) {
if (findText == null || findText.isEmpty())
return Collections.emptyList();
content = content.toLowerCase();
findText = findText.toLowerCase();
List indexes = new ArrayList();
int index = 0;
int wordLength = 0;
while (index != -1) {
index = content.indexOf(findText, index + wordLength);
if (index != -1)
indexes.add(index);
wordLength = findText.length();
}
return indexes;
}
private static String print(URI uri) throws Exception {
try (JarPrinter printer = new JarPrinter()) {
int options = -1;
try (Jar jar = new Jar(uri.toString(), uri.toURL()
.openStream())) {
printer.doPrint(jar, options, false, false);
return printer.toString();
}
}
}
@Override
public void setActive(boolean active) {
super.setActive(active);
IActionBars actionBars = getEditorSite().getActionBars();
if (active) {
update();
actionBars.setGlobalActionHandler(ActionFactory.FIND.getId(), findAction);
actionBars.setGlobalActionHandler(ActionFactory.NEXT.getId(), nextAction);
actionBars.setGlobalActionHandler(ActionFactory.PREVIOUS.getId(), previousAction);
} else {
actionBars.setGlobalActionHandler(ActionFactory.FIND.getId(), null);
actionBars.setGlobalActionHandler(ActionFactory.NEXT.getId(), null);
actionBars.setGlobalActionHandler(ActionFactory.PREVIOUS.getId(), null);
}
}
private void update() {
if (loading || styledText == null || !isActive()) {
return;
}
loading = true;
JAREditor.background("Printing ZIP file", monitor -> {
return print(uri);
}, (text) -> {
styledText.setText(text);
styledText.setFocus();
});
}
public void setInput(URI uri) {
this.uri = uri;
loading = false;
update();
}
static class FindTextEvent extends Event {
String findText;
FindTextEvent(String s) {
data = s;
}
}
static class HighlightEvent extends Event {
String findText;
StyleRange[] highlights;
HighlightEvent(String text, StyleRange[] ranges, int i) {
findText = text;
highlights = ranges;
index = i;
}
}
private interface ChangeListener {
void handleEvent(Event event);
}
private void addChangeListener(ChangeListener listener) {
if (!changeListeners.contains(listener))
changeListeners.add(listener);
}
private void fireChangeEvent(Event event) {
changeListeners.forEach(listener -> {
try {
listener.handleEvent(event);
} catch (Exception e) {}
});
}
private List changeListeners = new CopyOnWriteArrayList<>();
}
