1 files changed, 142 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/wm/FocusedStackFrame.java b/services/core/java/com/android/server/wm/FocusedStackFrame.java
new file mode 100644
index 0000000..f1f5fe8
--- /dev/null
+++ b/services/core/java/com/android/server/wm/FocusedStackFrame.java
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2013 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 static com.android.server.wm.WindowManagerService.DEBUG_STACK;
+import static com.android.server.wm.WindowManagerService.DEBUG_SURFACE_TRACE;
+
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.PixelFormat;
+import android.graphics.Rect;
+import android.graphics.Region;
+import android.util.Slog;
+import android.view.Display;
+import android.view.Surface.OutOfResourcesException;
+import android.view.Surface;
+import android.view.SurfaceControl;
+import android.view.SurfaceSession;
+
+import com.android.server.wm.WindowStateAnimator.SurfaceTrace;
+
+class FocusedStackFrame {
+    private static final String TAG = "FocusedStackFrame";
+    private static final int THICKNESS = 10;
+    private static final float ALPHA = 0.3f;
+
+    private final SurfaceControl mSurfaceControl;
+    private final Surface mSurface = new Surface();
+    private final Rect mLastBounds = new Rect();
+    final Rect mBounds = new Rect();
+    private final Rect mTmpDrawRect = new Rect();
+
+    public FocusedStackFrame(Display display, SurfaceSession session) {
+        SurfaceControl ctrl = null;
+        try {
+            if (DEBUG_SURFACE_TRACE) {
+                ctrl = new SurfaceTrace(session, "FocusedStackFrame",
+                    1, 1, PixelFormat.TRANSLUCENT, SurfaceControl.HIDDEN);
+            } else {
+                ctrl = new SurfaceControl(session, "FocusedStackFrame",
+                    1, 1, PixelFormat.TRANSLUCENT, SurfaceControl.HIDDEN);
+            }
+            ctrl.setLayerStack(display.getLayerStack());
+            ctrl.setAlpha(ALPHA);
+            mSurface.copyFrom(ctrl);
+        } catch (OutOfResourcesException e) {
+        }
+        mSurfaceControl = ctrl;
+    }
+
+    private void draw(Rect bounds, int color) {
+        if (false && DEBUG_STACK) Slog.i(TAG, "draw: bounds=" + bounds.toShortString() +
+                " color=" + Integer.toHexString(color));
+        mTmpDrawRect.set(bounds);
+        Canvas c = null;
+        try {
+            c = mSurface.lockCanvas(mTmpDrawRect);
+        } catch (IllegalArgumentException e) {
+        } catch (Surface.OutOfResourcesException e) {
+        }
+        if (c == null) {
+            return;
+        }
+
+        final int w = bounds.width();
+        final int h = bounds.height();
+
+        // Top
+        mTmpDrawRect.set(0, 0, w, THICKNESS);
+        c.clipRect(mTmpDrawRect, Region.Op.REPLACE);
+        c.drawColor(color);
+        // Left (not including Top or Bottom stripe).
+        mTmpDrawRect.set(0, THICKNESS, THICKNESS, h - THICKNESS);
+        c.clipRect(mTmpDrawRect, Region.Op.REPLACE);
+        c.drawColor(color);
+        // Right (not including Top or Bottom stripe).
+        mTmpDrawRect.set(w - THICKNESS, THICKNESS, w, h - THICKNESS);
+        c.clipRect(mTmpDrawRect, Region.Op.REPLACE);
+        c.drawColor(color);
+        // Bottom
+        mTmpDrawRect.set(0, h - THICKNESS, w, h);
+        c.clipRect(mTmpDrawRect, Region.Op.REPLACE);
+        c.drawColor(color);
+
+        mSurface.unlockCanvasAndPost(c);
+    }
+
+    private void positionSurface(Rect bounds) {
+        if (false && DEBUG_STACK) Slog.i(TAG, "positionSurface: bounds=" + bounds.toShortString());
+        mSurfaceControl.setSize(bounds.width(), bounds.height());
+        mSurfaceControl.setPosition(bounds.left, bounds.top);
+    }
+
+    // Note: caller responsible for being inside
+    // Surface.openTransaction() / closeTransaction()
+    public void setVisibility(boolean on) {
+        if (false && DEBUG_STACK) Slog.i(TAG, "setVisibility: on=" + on +
+                " mLastBounds=" + mLastBounds.toShortString() +
+                " mBounds=" + mBounds.toShortString());
+        if (mSurfaceControl == null) {
+            return;
+        }
+        if (on) {
+            if (!mLastBounds.equals(mBounds)) {
+                // Erase the previous rectangle.
+                positionSurface(mLastBounds);
+                draw(mLastBounds, Color.TRANSPARENT);
+                // Draw the latest rectangle.
+                positionSurface(mBounds);
+                draw(mBounds, Color.WHITE);
+                // Update the history.
+                mLastBounds.set(mBounds);
+            }
+            mSurfaceControl.show();
+        } else {
+            mSurfaceControl.hide();
+        }
+    }
+
+    public void setBounds(TaskStack stack) {
+        stack.getBounds(mBounds);
+        if (false && DEBUG_STACK) Slog.i(TAG, "setBounds: bounds=" + mBounds);
+    }
+
+    public void setLayer(int layer) {
+        mSurfaceControl.setLayer(layer);
+    }
+}