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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.gfx;
import android.graphics.PointF;
import android.graphics.RectF;
/**
* ImmutableViewportMetrics are used to store the viewport metrics
* in way that we can access a version of them from multiple threads
* without having to take a lock
*/
public class ImmutableViewportMetrics {
// We need to flatten the RectF and FloatSize structures
// because Java doesn't have the concept of const classes
public final float pageSizeWidth;
public final float pageSizeHeight;
public final float viewportRectBottom;
public final float viewportRectLeft;
public final float viewportRectRight;
public final float viewportRectTop;
public final float zoomFactor;
public ImmutableViewportMetrics(ViewportMetrics m) {
RectF viewportRect = m.getViewport();
viewportRectBottom = viewportRect.bottom;
viewportRectLeft = viewportRect.left;
viewportRectRight = viewportRect.right;
viewportRectTop = viewportRect.top;
FloatSize pageSize = m.getPageSize();
pageSizeWidth = pageSize.width;
pageSizeHeight = pageSize.height;
zoomFactor = m.getZoomFactor();
}
public float getWidth() {
return viewportRectRight - viewportRectLeft;
}
public float getHeight() {
return viewportRectBottom - viewportRectTop;
}
// some helpers to make ImmutableViewportMetrics act more like ViewportMetrics
public PointF getOrigin() {
return new PointF(viewportRectLeft, viewportRectTop);
}
public FloatSize getSize() {
return new FloatSize(viewportRectRight - viewportRectLeft, viewportRectBottom - viewportRectTop);
}
public RectF getViewport() {
return new RectF(viewportRectLeft,
viewportRectTop,
viewportRectRight,
viewportRectBottom);
}
public FloatSize getPageSize() {
return new FloatSize(pageSizeWidth, pageSizeHeight);
}
}
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