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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /mobile/android/geckoview/src/main/java/org/mozilla/gecko/MagnifiableSurfaceView.java | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'mobile/android/geckoview/src/main/java/org/mozilla/gecko/MagnifiableSurfaceView.java')
-rw-r--r-- | mobile/android/geckoview/src/main/java/org/mozilla/gecko/MagnifiableSurfaceView.java | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/mobile/android/geckoview/src/main/java/org/mozilla/gecko/MagnifiableSurfaceView.java b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/MagnifiableSurfaceView.java new file mode 100644 index 0000000000..2003abcc6f --- /dev/null +++ b/mobile/android/geckoview/src/main/java/org/mozilla/gecko/MagnifiableSurfaceView.java @@ -0,0 +1,137 @@ +/* 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; + +import android.content.Context; +import android.graphics.Canvas; +import android.graphics.Rect; +import android.view.Surface; +import android.view.SurfaceHolder; +import android.view.SurfaceView; + +/** + * A {@link android.view.SurfaceView} which allows a {@link android.widget.Magnifier} widget to + * magnify a custom {@link android.view.Surface} rather than the SurfaceView's default Surface. + */ +public class MagnifiableSurfaceView extends SurfaceView { + private static final String LOGTAG = "MagnifiableSurfaceView"; + + private SurfaceHolderWrapper mHolder; + + public MagnifiableSurfaceView(final Context context) { + super(context); + } + + @Override + public SurfaceHolder getHolder() { + if (mHolder != null) { + // Only return our custom holder if we are being called from the Magnifier class. + // Throwable.getStackTrace() is faster than Thread.getStackTrace(), but still has a cost, + // hence why we only check the caller if we have set an override Surface. + final StackTraceElement[] stackTrace = new Throwable().getStackTrace(); + if (stackTrace.length >= 2 + && stackTrace[1].getClassName().equals("android.widget.Magnifier")) { + return mHolder; + } + } + return super.getHolder(); + } + + /** + * Sets the Surface that should be magnified by a Magnifier widget. + * + * <p>This should be set immediately before calling {@link android.widget.Magnifier#show()} or + * {@link android.widget.Magnifier#update()}, and unset immediately afterwards. + * + * @param surface The Surface to be magnified. If null, the SurfaceView's default Surface will be + * used. + */ + public void setMagnifierSurface(final Surface surface) { + if (surface != null) { + mHolder = new SurfaceHolderWrapper(getHolder(), surface); + } else { + mHolder = null; + } + } + + /** + * A {@link android.view.SurfaceHolder} implementation that simply forwards all methods to a + * provided SurfaceHolder instance, except for getSurface() which returns a custom Surface. + */ + private class SurfaceHolderWrapper implements SurfaceHolder { + private final SurfaceHolder mHolder; + private final Surface mSurface; + + public SurfaceHolderWrapper(final SurfaceHolder holder, final Surface surface) { + mHolder = holder; + mSurface = surface; + } + + @Override + public void addCallback(final Callback callback) { + mHolder.addCallback(callback); + } + + @Override + public void removeCallback(final Callback callback) { + mHolder.removeCallback(callback); + } + + @Override + public boolean isCreating() { + return mHolder.isCreating(); + } + + @Override + public void setType(final int type) { + mHolder.setType(type); + } + + @Override + public void setFixedSize(final int width, final int height) { + mHolder.setFixedSize(width, height); + } + + @Override + public void setSizeFromLayout() { + mHolder.setSizeFromLayout(); + } + + @Override + public void setFormat(final int format) { + mHolder.setFormat(format); + } + + @Override + public void setKeepScreenOn(final boolean screenOn) { + mHolder.setKeepScreenOn(screenOn); + } + + @Override + public Canvas lockCanvas() { + return mHolder.lockCanvas(); + } + + @Override + public Canvas lockCanvas(final Rect dirty) { + return mHolder.lockCanvas(dirty); + } + + @Override + public void unlockCanvasAndPost(final Canvas canvas) { + mHolder.unlockCanvasAndPost(canvas); + } + + @Override + public Rect getSurfaceFrame() { + return mHolder.getSurfaceFrame(); + } + + @Override + public Surface getSurface() { + return mSurface; + } + } +} |