1 files changed, 116 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/wm/StrictModeFlash.java b/services/core/java/com/android/server/wm/StrictModeFlash.java
new file mode 100644
index 0000000..fb5876b
--- /dev/null
+++ b/services/core/java/com/android/server/wm/StrictModeFlash.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.wm;
+
+
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.PixelFormat;
+import android.graphics.Rect;
+import android.graphics.Region;
+import android.view.Display;
+import android.view.Surface.OutOfResourcesException;
+import android.view.Surface;
+import android.view.SurfaceControl;
+import android.view.SurfaceSession;
+
+class StrictModeFlash {
+    private static final String TAG = "StrictModeFlash";
+
+    private final SurfaceControl mSurfaceControl;
+    private final Surface mSurface = new Surface();
+    private int mLastDW;
+    private int mLastDH;
+    private boolean mDrawNeeded;
+    private final int mThickness = 20;
+
+    public StrictModeFlash(Display display, SurfaceSession session) {
+        SurfaceControl ctrl = null;
+        try {
+            ctrl = new SurfaceControl(session, "StrictModeFlash",
+                1, 1, PixelFormat.TRANSLUCENT, SurfaceControl.HIDDEN);
+            ctrl.setLayerStack(display.getLayerStack());
+            ctrl.setLayer(WindowManagerService.TYPE_LAYER_MULTIPLIER * 101);  // one more than Watermark? arbitrary.
+            ctrl.setPosition(0, 0);
+            ctrl.show();
+            mSurface.copyFrom(ctrl);
+        } catch (OutOfResourcesException e) {
+        }
+        mSurfaceControl = ctrl;
+        mDrawNeeded = true;
+    }
+
+    private void drawIfNeeded() {
+        if (!mDrawNeeded) {
+            return;
+        }
+        mDrawNeeded = false;
+        final int dw = mLastDW;
+        final int dh = mLastDH;
+
+        Rect dirty = new Rect(0, 0, dw, dh);
+        Canvas c = null;
+        try {
+            c = mSurface.lockCanvas(dirty);
+        } catch (IllegalArgumentException e) {
+        } catch (Surface.OutOfResourcesException e) {
+        }
+        if (c == null) {
+            return;
+        }
+
+        // Top
+        c.clipRect(new Rect(0, 0, dw, mThickness), Region.Op.REPLACE);
+        c.drawColor(Color.RED);
+        // Left
+        c.clipRect(new Rect(0, 0, mThickness, dh), Region.Op.REPLACE);
+        c.drawColor(Color.RED);
+        // Right
+        c.clipRect(new Rect(dw - mThickness, 0, dw, dh), Region.Op.REPLACE);
+        c.drawColor(Color.RED);
+        // Bottom
+        c.clipRect(new Rect(0, dh - mThickness, dw, dh), Region.Op.REPLACE);
+        c.drawColor(Color.RED);
+
+        mSurface.unlockCanvasAndPost(c);
+    }
+
+    // Note: caller responsible for being inside
+    // Surface.openTransaction() / closeTransaction()
+    public void setVisibility(boolean on) {
+        if (mSurfaceControl == null) {
+            return;
+        }
+        drawIfNeeded();
+        if (on) {
+            mSurfaceControl.show();
+        } else {
+            mSurfaceControl.hide();
+        }
+    }
+
+    void positionSurface(int dw, int dh) {
+        if (mLastDW == dw && mLastDH == dh) {
+            return;
+        }
+        mLastDW = dw;
+        mLastDH = dh;
+        mSurfaceControl.setSize(dw, dh);
+        mDrawNeeded = true;
+    }
+
+}