/*******************************************************************************
* Copyright (c) 2000, 2008 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.jface.text.source;
import java.util.ArrayList;
import java.util.EventListener;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.ControlListener;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.events.HelpListener;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.MouseMoveListener;
import org.eclipse.swt.events.MouseTrackListener;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.ITextViewerExtension;
import org.eclipse.jface.text.ITextViewerExtension5;
/**
* Standard implementation of
* {@link org.eclipse.jface.text.source.IVerticalRuler}.
* <p>
* This ruler does not have a a visual representation of its own. The
* presentation comes from the configurable list of vertical ruler columns. Such
* columns must implement the
* {@link org.eclipse.jface.text.source.IVerticalRulerColumn}. interface.</p>
* <p>
* Clients may instantiate and configure this class.</p>
*
* @see org.eclipse.jface.text.source.IVerticalRulerColumn
* @see org.eclipse.jface.text.ITextViewer
* @since 2.0
*/
public class CompositeRuler implements IVerticalRuler, IVerticalRulerExtension, IVerticalRulerInfoExtension {
/**
* Layout of the composite vertical ruler. Arranges the list of columns.
*/
class RulerLayout extends Layout {
/**
* Creates the new ruler layout.
*/
protected RulerLayout() {
}
/*
* @see Layout#computeSize(Composite, int, int, boolean)
*/
protected Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) {
Control[] children= composite.getChildren();
Point size= new Point(0, 0);
for (int i= 0; i < children.length; i++) {
Point s= children[i].computeSize(SWT.DEFAULT, SWT.DEFAULT, flushCache);
size.x += s.x;
size.y= Math.max(size.y, s.y);
}
size.x += (Math.max(0, children.length -1) * fGap);
return size;
}
/*
* @see Layout#layout(Composite, boolean)
*/
protected void layout(Composite composite, boolean flushCache) {
Rectangle clArea= composite.getClientArea();
int rulerHeight= clArea.height;
int x= 0;
Iterator e= fDecorators.iterator();
while (e.hasNext()) {
IVerticalRulerColumn column= (IVerticalRulerColumn) e.next();
int columnWidth= column.getWidth();
column.getControl().setBounds(x, 0, columnWidth, rulerHeight);
x += (columnWidth + fGap);
}
}
}
/**
* A canvas that adds listeners to all its children. Used by the implementation of the
* vertical ruler to propagate listener additions and removals to the ruler's columns.
*/
static class CompositeRulerCanvas extends Canvas {
/**
* Keeps the information for which event type a listener object has been added.
*/
static class ListenerInfo {
Class fClass;
EventListener fListener;
}
/** The list of listeners added to this canvas. */
private List fCachedListeners= new ArrayList();
/**
* Internal listener for opening the context menu.
* @since 3.0
*/
private Listener fMenuDetectListener;
/**
* Creates a new composite ruler canvas.
*
* @param parent the parent composite
* @param style the SWT styles
*/
public CompositeRulerCanvas(Composite parent, int style) {
super(parent, style);
fMenuDetectListener= new Listener() {
public void handleEvent(Event event) {
if (event.type == SWT.MenuDetect) {
Menu menu= getMenu();
if (menu != null) {
menu.setLocation(event.x, event.y);
menu.setVisible(true);
}
}
}
};
super.addDisposeListener(new DisposeListener() {
public void widgetDisposed(DisposeEvent e) {
if (fCachedListeners != null) {
fCachedListeners.clear();
fCachedListeners= null;
}
}
});
}
/**
* Adds the given listener object as listener of the given type (<code>clazz</code>) to
* the given control.
*
* @param clazz the listener type
* @param control the control to add the listener to
* @param listener the listener to be added
*/
private void addListener(Class clazz, Control control, EventListener listener) {
if (ControlListener.class.equals(clazz)) {
control. addControlListener((ControlListener) listener);
return;
}
if (FocusListener.class.equals(clazz)) {
control. addFocusListener((FocusListener) listener);
return;
}
if (HelpListener.class.equals(clazz)) {
control. addHelpListener((HelpListener) listener);
return;
}
if (KeyListener.class.equals(clazz)) {
control. addKeyListener((KeyListener) listener);
return;
}
if (MouseListener.class.equals(clazz)) {
control. addMouseListener((MouseListener) listener);
return;
}
if (MouseMoveListener.class.equals(clazz)) {
control. addMouseMoveListener((MouseMoveListener) listener);
return;
}
if (MouseTrackListener.class.equals(clazz)) {
control. addMouseTrackListener((MouseTrackListener) listener);
return;
}
if (PaintListener.class.equals(clazz)) {
control. addPaintListener((PaintListener) listener);
return;
}
if (TraverseListener.class.equals(clazz)) {
control. addTraverseListener((TraverseListener) listener);
return;
}
if (DisposeListener.class.equals(clazz)) {
control. addDisposeListener((DisposeListener) listener);
return;
}
}
/**
* Removes the given listener object as listener of the given type (<code>clazz</code>) from
* the given control.
*
* @param clazz the listener type
* @param control the control to remove the listener from
* @param listener the listener to be removed
*/
private void removeListener(Class clazz, Control control, EventListener listener) {
if (ControlListener.class.equals(clazz)) {
control. removeControlListener((ControlListener) listener);
return;
}
if (FocusListener.class.equals(clazz)) {
control. removeFocusListener((FocusListener) listener);
return;
}
if (HelpListener.class.equals(clazz)) {
control. removeHelpListener((HelpListener) listener);
return;
}
if (KeyListener.class.equals(clazz)) {
control. removeKeyListener((KeyListener) listener);
return;
}
if (MouseListener.class.equals(clazz)) {
control. removeMouseListener((MouseListener) listener);
return;
}
if (MouseMoveListener.class.equals(clazz)) {
control. removeMouseMoveListener((MouseMoveListener) listener);
return;
}
if (MouseTrackListener.class.equals(clazz)) {
control. removeMouseTrackListener((MouseTrackListener) listener);
return;
}
if (PaintListener.class.equals(clazz)) {
control. removePaintListener((PaintListener) listener);
return;
}
if (TraverseListener.class.equals(clazz)) {
control. removeTraverseListener((TraverseListener) listener);
return;
}
if (DisposeListener.class.equals(clazz)) {
control. removeDisposeListener((DisposeListener) listener);
return;
}
}
/**
* Adds the given listener object to the internal book keeping under
* the given listener type (<code>clazz</code>).
*
* @param clazz the listener type
* @param listener the listener object
*/
private void addListener(Class clazz, EventListener listener) {
Control[] children= getChildren();
for (int i= 0; i < children.length; i++) {
if (children[i] != null && !children[i].isDisposed())
addListener(clazz, children[i], listener);
}
ListenerInfo info= new ListenerInfo();
info.fClass= clazz;
info.fListener= listener;
fCachedListeners.add(info);
}
/**
* Removes the given listener object from the internal book keeping under
* the given listener type (<code>clazz</code>).
*
* @param clazz the listener type
* @param listener the listener object
*/
private void removeListener(Class clazz, EventListener listener) {
int length= fCachedListeners.size();
for (int i= 0; i < length; i++) {
ListenerInfo info= (ListenerInfo) fCachedListeners.get(i);
if (listener == info.fListener && clazz.equals(info.fClass)) {
fCachedListeners.remove(i);
break;
}
}
Control[] children= getChildren();
for (int i= 0; i < children.length; i++) {
if (children[i] != null && !children[i].isDisposed())
removeListener(clazz, children[i], listener);
}
}
/**
* Tells this canvas that a child has been added.
*
* @param child the child
*/
public void childAdded(Control child) {
if (child != null && !child.isDisposed()) {
int length= fCachedListeners.size();
for (int i= 0; i < length; i++) {
ListenerInfo info= (ListenerInfo) fCachedListeners.get(i);
addListener(info.fClass, child, info.fListener);
}
child.addListener(SWT.MenuDetect, fMenuDetectListener);
}
}
/**
* Tells this canvas that a child has been removed.
*
* @param child the child
*/
public void childRemoved(Control child) {
if (child != null && !child.isDisposed()) {
int length= fCachedListeners.size();
for (int i= 0; i < length; i++) {
ListenerInfo info= (ListenerInfo) fCachedListeners.get(i);
removeListener(info.fClass, child, info.fListener);
}
child.removeListener(SWT.MenuDetect, fMenuDetectListener);
}
}
/*
* @see Control#removeControlListener(ControlListener)
*/
public void removeControlListener(ControlListener listener) {
removeListener(ControlListener.class, listener);
super.removeControlListener(listener);
}
/*
* @see Control#removeFocusListener(FocusListener)
*/
public void removeFocusListener(FocusListener listener) {
removeListener(FocusListener.class, listener);
super.removeFocusListener(listener);
}
/*
* @see Control#removeHelpListener(HelpListener)
*/
public void removeHelpListener(HelpListener listener) {
removeListener(HelpListener.class, listener);
super.removeHelpListener(listener);
}
/*
* @see Control#removeKeyListener(KeyListener)
*/
public void removeKeyListener(KeyListener listener) {
removeListener(KeyListener.class, listener);
super.removeKeyListener(listener);
}
/*
* @see Control#removeMouseListener(MouseListener)
*/
public void removeMouseListener(MouseListener listener) {
removeListener(MouseListener.class, listener);
super.removeMouseListener(listener);
}
/*
* @see Control#removeMouseMoveListener(MouseMoveListener)
*/
public void removeMouseMoveListener(MouseMoveListener listener) {
removeListener(MouseMoveListener.class, listener);
super.removeMouseMoveListener(listener);
}
/*
* @see Control#removeMouseTrackListener(MouseTrackListener)
*/
public void removeMouseTrackListener(MouseTrackListener listener) {
removeListener(MouseTrackListener.class, listener);
super.removeMouseTrackListener(listener);
}
/*
* @see Control#removePaintListener(PaintListener)
*/
public void removePaintListener(PaintListener listener) {
removeListener(PaintListener.class, listener);
super.removePaintListener(listener);
}
/*
* @see Control#removeTraverseListener(TraverseListener)
*/
public void removeTraverseListener(TraverseListener listener) {
removeListener(TraverseListener.class, listener);
super.removeTraverseListener(listener);
}
/*
* @see Widget#removeDisposeListener(DisposeListener)
*/
public void removeDisposeListener(DisposeListener listener) {
removeListener(DisposeListener.class, listener);
super.removeDisposeListener(listener);
}
/*
* @seeControl#addControlListener(ControlListener)
*/
public void addControlListener(ControlListener listener) {
super.addControlListener(listener);
addListener(ControlListener.class, listener);
}
/*
* @see Control#addFocusListener(FocusListener)
*/
public void addFocusListener(FocusListener listener) {
super.addFocusListener(listener);
addListener(FocusListener.class, listener);
}
/*
* @see Control#addHelpListener(HelpListener)
*/
public void addHelpListener(HelpListener listener) {
super.addHelpListener(listener);
addListener(HelpListener.class, listener);
}
/*
* @see Control#addKeyListener(KeyListener)
*/
public void addKeyListener(KeyListener listener) {
super.addKeyListener(listener);
addListener(KeyListener.class, listener);
}
/*
* @see Control#addMouseListener(MouseListener)
*/
public void addMouseListener(MouseListener listener) {
super.addMouseListener(listener);
addListener(MouseListener.class, listener);
}
/*
* @see Control#addMouseMoveListener(MouseMoveListener)
*/
public void addMouseMoveListener(MouseMoveListener listener) {
super.addMouseMoveListener(listener);
addListener(MouseMoveListener.class, listener);
}
/*
* @see Control#addMouseTrackListener(MouseTrackListener)
*/
public void addMouseTrackListener(MouseTrackListener listener) {
super.addMouseTrackListener(listener);
addListener(MouseTrackListener.class, listener);
}
/*
* @seeControl#addPaintListener(PaintListener)
*/
public void addPaintListener(PaintListener listener) {
super.addPaintListener(listener);
addListener(PaintListener.class, listener);
}
/*
* @see Control#addTraverseListener(TraverseListener)
*/
public void addTraverseListener(TraverseListener listener) {
super.addTraverseListener(listener);
addListener(TraverseListener.class, listener);
}
/*
* @see Widget#addDisposeListener(DisposeListener)
*/
public void addDisposeListener(DisposeListener listener) {
super.addDisposeListener(listener);
addListener(DisposeListener.class, listener);
}
}
/** The ruler's viewer */
private ITextViewer fTextViewer;
/** The ruler's canvas to which to add the ruler columns */
private CompositeRulerCanvas fComposite;
/** The ruler's annotation model */
private IAnnotationModel fModel;
/** The list of columns */
private List fDecorators= new ArrayList(2);
/** The cached location of the last mouse button activity */
private Point fLocation= new Point(-1, -1);
/** The cached line of the list mouse button activity */
private int fLastMouseButtonActivityLine= -1;
/** The gap between the individual columns of this composite ruler */
private int fGap;
/**
* The set of annotation listeners.
* @since 3.0
*/
private Set fAnnotationListeners= new HashSet();
/**
* Constructs a new composite vertical ruler.
*/
public CompositeRuler() {
this(0);
}
/**
* Constructs a new composite ruler with the given gap between its columns.
*
* @param gap
*/
public CompositeRuler(int gap) {
fGap= gap;
}
/**
* Inserts the given column at the specified slot to this composite ruler.
* Columns are counted from left to right.
*
* @param index the index
* @param rulerColumn the decorator to be inserted
*/
public void addDecorator(int index, IVerticalRulerColumn rulerColumn) {
rulerColumn.setModel(getModel());
if (index > fDecorators.size())
fDecorators.add(rulerColumn);
else
fDecorators.add(index, rulerColumn);
if (fComposite != null && !fComposite.isDisposed()) {
rulerColumn.createControl(this, fComposite);
fComposite.childAdded(rulerColumn.getControl());
layoutTextViewer();
}
}
/**
* Removes the decorator in the specified slot from this composite ruler.
*
* @param index the index
*/
public void removeDecorator(int index) {
IVerticalRulerColumn rulerColumn= (IVerticalRulerColumn) fDecorators.get(index);
removeDecorator(rulerColumn);
}
/**
* Removes the given decorator from the composite ruler.
*
* @param rulerColumn the ruler column to be removed
* @since 3.0
*/
public void removeDecorator(IVerticalRulerColumn rulerColumn) {
fDecorators.remove(rulerColumn);
if (rulerColumn != null) {
Control cc= rulerColumn.getControl();
if (cc != null && !cc.isDisposed()) {
fComposite.childRemoved(cc);
cc.dispose();
}
}
layoutTextViewer();
}
/**
* Layouts the text viewer. This also causes this ruler to get
* be layouted.
*/
private void layoutTextViewer() {
Control parent= fTextViewer.getTextWidget();
if (fTextViewer instanceof ITextViewerExtension) {
ITextViewerExtension extension= (ITextViewerExtension) fTextViewer;
parent= extension.getControl();
}
if (parent instanceof Composite && !parent.isDisposed())
((Composite) parent).layout(true);
}
/*
* @see IVerticalRuler#getControl()
*/
public Control getControl() {
return fComposite;
}
/*
* @see IVerticalRuler#createControl(Composite, ITextViewer)
*/
public Control createControl(Composite parent, ITextViewer textViewer) {
fTextViewer= textViewer;
fComposite= new CompositeRulerCanvas(parent, SWT.NONE);
fComposite.setLayout(new RulerLayout());
Iterator iter= fDecorators.iterator();
while (iter.hasNext()) {
IVerticalRulerColumn column= (IVerticalRulerColumn) iter.next();
column.createControl(this, fComposite);
fComposite.childAdded(column.getControl());
}
return fComposite;
}
/*
* @see IVerticalRuler#setModel(IAnnotationModel)
*/
public void setModel(IAnnotationModel model) {
fModel= model;
Iterator e= fDecorators.iterator();
while (e.hasNext()) {
IVerticalRulerColumn column= (IVerticalRulerColumn) e.next();
column.setModel(model);
}
}
/*
* @see IVerticalRuler#getModel()
*/
public IAnnotationModel getModel() {
return fModel;
}
/*
* @see IVerticalRuler#update()
*/
public void update() {
if (fComposite != null && !fComposite.isDisposed()) {
Display d= fComposite.getDisplay();
if (d != null) {
d.asyncExec(new Runnable() {
public void run() {
immediateUpdate();
}
});
}
}
}
/**
* Immediately redraws the entire ruler (without asynchronous posting).
*
* @since 3.2
*/
public void immediateUpdate() {
Iterator e= fDecorators.iterator();
while (e.hasNext()) {
IVerticalRulerColumn column= (IVerticalRulerColumn) e.next();
column.redraw();
}
}
/*
* @see IVerticalRulerExtension#setFont(Font)
*/
public void setFont(Font font) {
Iterator e= fDecorators.iterator();
while (e.hasNext()) {
IVerticalRulerColumn column= (IVerticalRulerColumn) e.next();
column.setFont(font);
}
}
/*
* @see IVerticalRulerInfo#getWidth()
*/
public int getWidth() {
int width= 0;
Iterator e= fDecorators.iterator();
while (e.hasNext()) {
IVerticalRulerColumn column= (IVerticalRulerColumn) e.next();
width += (column.getWidth() + fGap);
}
return Math.max(0, width - fGap);
}
/*
* @see IVerticalRulerInfo#getLineOfLastMouseButtonActivity()
*/
public int getLineOfLastMouseButtonActivity() {
if (fLastMouseButtonActivityLine == -1)
fLastMouseButtonActivityLine= toDocumentLineNumber(fLocation.y);
else if (fTextViewer.getDocument() == null || fLastMouseButtonActivityLine >= fTextViewer.getDocument().getNumberOfLines())
fLastMouseButtonActivityLine= -1;
return fLastMouseButtonActivityLine;
}
/*
* @see IVerticalRulerInfo#toDocumentLineNumber(int)
*/
public int toDocumentLineNumber(int y_coordinate) {
if (fTextViewer == null || y_coordinate == -1)
return -1;
StyledText text= fTextViewer.getTextWidget();
int line= text.getLineIndex(y_coordinate);
if (line == text.getLineCount() - 1) {
// check whether y_coordinate exceeds last line
if (y_coordinate > text.getLinePixel(line + 1))
return -1;
}
return widgetLine2ModelLine(fTextViewer, line);
}
/**
* Returns the line in the given viewer's document that correspond to the given
* line of the viewer's widget.
*
* @param viewer the viewer
* @param widgetLine the widget line
* @return the corresponding line the viewer's document
* @since 2.1
*/
protected final static int widgetLine2ModelLine(ITextViewer viewer, int widgetLine) {
if (viewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension= (ITextViewerExtension5) viewer;
return extension.widgetLine2ModelLine(widgetLine);
}
try {
IRegion r= viewer.getVisibleRegion();
IDocument d= viewer.getDocument();
return widgetLine += d.getLineOfOffset(r.getOffset());
} catch (BadLocationException x) {
}
return widgetLine;
}
/**
* Returns this ruler's text viewer.
*
* @return this ruler's text viewer
*/
public ITextViewer getTextViewer() {
return fTextViewer;
}
/*
* @see IVerticalRulerExtension#setLocationOfLastMouseButtonActivity(int, int)
*/
public void setLocationOfLastMouseButtonActivity(int x, int y) {
fLocation.x= x;
fLocation.y= y;
fLastMouseButtonActivityLine= -1;
}
/**
* Returns an iterator over the <code>IVerticalRulerColumns</code> that make up this
* composite column.
*
* @return an iterator over the contained columns.
* @since 3.0
*/
public Iterator getDecoratorIterator() {
Assert.isNotNull(fDecorators, "fDecorators must be initialized"); //$NON-NLS-1$
return fDecorators.iterator();
}
/*
* @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#getHover()
* @since 3.0
*/
public IAnnotationHover getHover() {
return null;
}
/*
* @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#addVerticalRulerListener(org.eclipse.jface.text.source.IVerticalRulerListener)
* @since 3.0
*/
public void addVerticalRulerListener(IVerticalRulerListener listener) {
fAnnotationListeners.add(listener);
}
/*
* @see org.eclipse.jface.text.source.IVerticalRulerInfoExtension#removeVerticalRulerListener(org.eclipse.jface.text.source.IVerticalRulerListener)
* @since 3.0
*/
public void removeVerticalRulerListener(IVerticalRulerListener listener) {
fAnnotationListeners.remove(listener);
}
/**
* Fires the annotation selected event to all registered vertical ruler
* listeners.
* TODO use robust iterators
*
* @param event the event to fire
* @since 3.0
*/
public void fireAnnotationSelected(VerticalRulerEvent event) {
// forward to listeners
for (Iterator it= fAnnotationListeners.iterator(); it.hasNext();) {
IVerticalRulerListener listener= (IVerticalRulerListener) it.next();
listener.annotationSelected(event);
}
}
/**
* Fires the annotation default selected event to all registered vertical
* ruler listeners.
* TODO use robust iterators
*
* @param event the event to fire
* @since 3.0
*/
public void fireAnnotationDefaultSelected(VerticalRulerEvent event) {
// forward to listeners
for (Iterator it= fAnnotationListeners.iterator(); it.hasNext();) {
IVerticalRulerListener listener= (IVerticalRulerListener) it.next();
listener.annotationDefaultSelected(event);
}
}
/**
* Informs all registered vertical ruler listeners that the content menu on a selected annotation\
* is about to be shown.
* TODO use robust iterators
*
* @param event the event to fire
* @param menu the menu that is about to be shown
* @since 3.0
*/
public void fireAnnotationContextMenuAboutToShow(VerticalRulerEvent event, Menu menu) {
// forward to listeners
for (Iterator it= fAnnotationListeners.iterator(); it.hasNext();) {
IVerticalRulerListener listener= (IVerticalRulerListener) it.next();
listener.annotationContextMenuAboutToShow(event, menu);
}
}
/**
* Relayouts the receiver.
*
* @since 3.3
*/
public void relayout() {
layoutTextViewer();
}
}