gecko/mobile/android/base/gfx/ImmutableViewportMetrics.java

110 lines
3.7 KiB
Java

/* -*- 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 pageRectLeft;
public final float pageRectTop;
public final float pageRectRight;
public final float pageRectBottom;
public final float cssPageRectLeft;
public final float cssPageRectTop;
public final float cssPageRectRight;
public final float cssPageRectBottom;
public final float viewportRectLeft;
public final float viewportRectTop;
public final float viewportRectRight;
public final float viewportRectBottom;
public final float zoomFactor;
public ImmutableViewportMetrics(ViewportMetrics m) {
RectF viewportRect = m.getViewport();
viewportRectLeft = viewportRect.left;
viewportRectTop = viewportRect.top;
viewportRectRight = viewportRect.right;
viewportRectBottom = viewportRect.bottom;
RectF pageRect = m.getPageRect();
pageRectLeft = pageRect.left;
pageRectTop = pageRect.top;
pageRectRight = pageRect.right;
pageRectBottom = pageRect.bottom;
RectF cssPageRect = m.getCssPageRect();
cssPageRectLeft = cssPageRect.left;
cssPageRectTop = cssPageRect.top;
cssPageRectRight = cssPageRect.right;
cssPageRectBottom = cssPageRect.bottom;
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 RectF getCssViewport() {
return RectUtils.scale(getViewport(), 1/zoomFactor);
}
public RectF getPageRect() {
return new RectF(pageRectLeft, pageRectTop, pageRectRight, pageRectBottom);
}
public float getPageWidth() {
return pageRectRight - pageRectLeft;
}
public float getPageHeight() {
return pageRectBottom - pageRectTop;
}
public RectF getCssPageRect() {
return new RectF(cssPageRectLeft, cssPageRectTop, cssPageRectRight, cssPageRectBottom);
}
@Override
public String toString() {
return "ImmutableViewportMetrics v=(" + viewportRectLeft + "," + viewportRectTop + ","
+ viewportRectRight + "," + viewportRectBottom + ") p=(" + pageRectLeft + ","
+ pageRectTop + "," + pageRectRight + "," + pageRectBottom + ") c=("
+ cssPageRectLeft + "," + cssPageRectTop + "," + cssPageRectRight + ","
+ cssPageRectBottom + ") z=" + zoomFactor;
}
}