/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.crsh.text.renderers;
import org.crsh.text.Color;
import org.crsh.text.LineReader;
import org.crsh.text.LineRenderer;
import org.crsh.text.RenderAppendable;
import java.lang.management.MemoryUsage;
class MemoryUsageLineRenderer extends LineRenderer {
/** . */
private final MemoryUsage usage;
MemoryUsageLineRenderer(MemoryUsage usage) {
this.usage = usage;
}
@Override
public int getActualWidth() {
return 32;
}
@Override
public int getMinWidth() {
return 4;
}
@Override
public int getMinHeight(int width) {
return 1;
}
@Override
public int getActualHeight(int width) {
return 2;
}
@Override
public LineReader reader(int width) {
return reader(width, 2);
}
@Override
public LineReader reader(final int width, final int height) {
return new LineReader() {
/** . */
private int index = 0;
public boolean hasLine() {
return index < height;
}
public void renderLine(RenderAppendable to) throws IllegalStateException {
if (!hasLine()) {
throw new IllegalStateException();
}
long range = usage.getMax() - usage.getInit();
Color previous = null;
if (usage.getMax() > 0) {
long a = (width * usage.getUsed()) / (usage.getMax());
long b = (width * usage.getCommitted()) / (usage.getMax());
for (int i = 0;i < width;i++) {
Color current;
if (i >= b) {
// MAX
current = Color.green;
} else if (i >= a) {
// COMMITED
current = Color.blue;
} else {
// USED
current = Color.cyan;
}
if (previous != current) {
if (previous != null) {
to.leaveStyle();
}
to.enterStyle(current.bg());
previous = current;
}
to.append(' ');
}
if (previous != null) {
to.leaveStyle();
}
} else {
for (int i = 0;i < width;i++) {
to.append(' ');
}
}
index++;
}
};
}
}