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/*******************************************************************************
* Copyright (C) 2016, Thomas Wolf <thomas.wolf@paranor.ch>
*
* 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
*******************************************************************************/
package org.eclipse.egit.ui.internal.commit;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.source.LineNumberRulerColumn;
import org.eclipse.jgit.annotations.NonNull;
import org.eclipse.jgit.diff.DiffEntry;
/**
* A {@link LineNumberRulerColumn} that uses an
* {@link ILogicalLineNumberProvider} to determine the line numbers to show.
*/
public class LogicalLineNumberRulerColumn extends LineNumberRulerColumn {
private ILogicalLineNumberProvider logicalLineNumberProvider;
private final @NonNull DiffEntry.Side side;
/**
* Zoom level for workaround for HiDPI line number rulers on macOS retina.
*
* @see <a href="https://bugs.eclipse.org/516322">Bug 516322</a>
*/
int zoom = 100;
/**
* @param side
*/
public LogicalLineNumberRulerColumn(@NonNull DiffEntry.Side side) {
this.side = side;
}
/**
* @return the {@link DiffEntry} side
*/
protected @NonNull DiffEntry.Side getSide() {
return side;
}
/**
* Retrieves the {@link ILogicalLineNumberProvider} to use. This
* implementation returns a {@link LogicalLineNumberProvider}.
*
* @return the {@link ILogicalLineNumberProvider}
*/
protected ILogicalLineNumberProvider getLogicalLineNumberProvider() {
if (logicalLineNumberProvider == null) {
ITextViewer viewer = getParentRuler().getTextViewer();
Assert.isNotNull(viewer);
logicalLineNumberProvider = new LogicalLineNumberProvider(getSide(),
viewer);
}
return logicalLineNumberProvider;
}
@Override
protected String createDisplayString(int line) {
int logicalLine = getLogicalLineNumberProvider().getLogicalLine(line);
return logicalLine < 0 ? "" : Integer.toString(logicalLine + 1); //$NON-NLS-1$
}
@Override
protected int computeNumberOfDigits() {
int max = getLogicalLineNumberProvider().getMaximum();
int digits = 2;
while (max > Math.pow(10, digits) - 1) {
++digits;
}
return digits;
}
/**
* Enable workaround for HiDPI line number rulers on macOS retina. This
* method will override an internal method in Oxygen (4.7).
*
* @return true
* @see <a href="https://bugs.eclipse.org/516322">Bug 516322</a>
*/
protected boolean internalSupportsZoomedPaint() {
return true;
}
/**
* Store zoom level for workaround for HiDPI line number rulers on macOS
* retina. This method will override an internal method in Oxygen (4.7).
*
* @param zoomLevel
* the zoom level to use for drawing operations
* @see <a href="https://bugs.eclipse.org/516322">Bug 516322</a>
*/
protected void internalSetZoom(int zoomLevel) {
this.zoom = zoomLevel;
}
}
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