Merge "DO NO MERGE -- Revert the following two commits as they're causing flickering" into nyc-mr1-dev
diff --git a/packages/Keyguard/src/com/android/keyguard/KeyguardPasswordView.java b/packages/Keyguard/src/com/android/keyguard/KeyguardPasswordView.java
index b75f529..ddccc14 100644
--- a/packages/Keyguard/src/com/android/keyguard/KeyguardPasswordView.java
+++ b/packages/Keyguard/src/com/android/keyguard/KeyguardPasswordView.java
@@ -42,16 +42,21 @@
  * Displays an alphanumeric (latin-1) key entry for the user to enter
  * an unlock password
  */
-
 public class KeyguardPasswordView extends KeyguardAbsKeyInputView
         implements KeyguardSecurityView, OnEditorActionListener, TextWatcher {
 
     private final boolean mShowImeAtScreenOn;
     private final int mDisappearYTranslation;
 
+    // A delay constant to be used in a workaround for the situation where InputMethodManagerService
+    // is not switched to the new user yet.
+    // TODO: Remove this by ensuring such a race condition never happens.
+    private static final int DELAY_MILLIS_TO_REEVALUATE_IME_SWITCH_ICON = 500;  // 500ms
+
     InputMethodManager mImm;
     private TextView mPasswordEntry;
     private TextViewInputDisabler mPasswordEntryDisabler;
+    private View mSwitchImeButton;
 
     private Interpolator mLinearOutSlowInInterpolator;
     private Interpolator mFastOutLinearInInterpolator;
@@ -141,12 +146,31 @@
         mPasswordEntry.requestFocus();
     }
 
+    private void updateSwitchImeButton() {
+        // If there's more than one IME, enable the IME switcher button
+        final boolean wasVisible = mSwitchImeButton.getVisibility() == View.VISIBLE;
+        final boolean shouldBeVisible = hasMultipleEnabledIMEsOrSubtypes(mImm, false);
+        if (wasVisible != shouldBeVisible) {
+            mSwitchImeButton.setVisibility(shouldBeVisible ? View.VISIBLE : View.GONE);
+        }
+
+        // TODO: Check if we still need this hack.
+        // If no icon is visible, reset the start margin on the password field so the text is
+        // still centered.
+        if (mSwitchImeButton.getVisibility() != View.VISIBLE) {
+            android.view.ViewGroup.LayoutParams params = mPasswordEntry.getLayoutParams();
+            if (params instanceof MarginLayoutParams) {
+                final MarginLayoutParams mlp = (MarginLayoutParams) params;
+                mlp.setMarginStart(0);
+                mPasswordEntry.setLayoutParams(params);
+            }
+        }
+    }
+
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
 
-        boolean imeOrDeleteButtonVisible = false;
-
         mImm = (InputMethodManager) getContext().getSystemService(
                 Context.INPUT_METHOD_SERVICE);
 
@@ -171,31 +195,29 @@
 
         mPasswordEntry.requestFocus();
 
-        // If there's more than one IME, enable the IME switcher button
-        View switchImeButton = findViewById(R.id.switch_ime_button);
-        if (switchImeButton != null && hasMultipleEnabledIMEsOrSubtypes(mImm, false)) {
-            switchImeButton.setVisibility(View.VISIBLE);
-            imeOrDeleteButtonVisible = true;
-            switchImeButton.setOnClickListener(new OnClickListener() {
-                @Override
-                public void onClick(View v) {
-                    mCallback.userActivity(); // Leave the screen on a bit longer
-                    // Do not show auxiliary subtypes in password lock screen.
-                    mImm.showInputMethodPicker(false /* showAuxiliarySubtypes */);
-                }
-            });
-        }
-
-        // If no icon is visible, reset the start margin on the password field so the text is
-        // still centered.
-        if (!imeOrDeleteButtonVisible) {
-            android.view.ViewGroup.LayoutParams params = mPasswordEntry.getLayoutParams();
-            if (params instanceof MarginLayoutParams) {
-                final MarginLayoutParams mlp = (MarginLayoutParams) params;
-                mlp.setMarginStart(0);
-                mPasswordEntry.setLayoutParams(params);
+        mSwitchImeButton = findViewById(R.id.switch_ime_button);
+        mSwitchImeButton.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                mCallback.userActivity(); // Leave the screen on a bit longer
+                // Do not show auxiliary subtypes in password lock screen.
+                mImm.showInputMethodPicker(false /* showAuxiliarySubtypes */);
             }
-        }
+        });
+
+        // If there's more than one IME, enable the IME switcher button
+        updateSwitchImeButton();
+
+        // When we the current user is switching, InputMethodManagerService sometimes has not
+        // switched internal state yet here. As a quick workaround, we check the keyboard state
+        // again.
+        // TODO: Remove this workaround by ensuring such a race condition never happens.
+        postDelayed(new Runnable() {
+            @Override
+            public void run() {
+                updateSwitchImeButton();
+            }
+        }, DELAY_MILLIS_TO_REEVALUATE_IME_SWITCH_ICON);
     }
 
     @Override
diff --git a/services/core/java/com/android/server/wm/WindowStateAnimator.java b/services/core/java/com/android/server/wm/WindowStateAnimator.java
index e374ee9..c2ec8c1 100644
--- a/services/core/java/com/android/server/wm/WindowStateAnimator.java
+++ b/services/core/java/com/android/server/wm/WindowStateAnimator.java
@@ -926,6 +926,22 @@
         mPendingDestroySurface = null;
     }
 
+    void applyMagnificationSpec(MagnificationSpec spec, Matrix transform) {
+        final int surfaceInsetLeft = mWin.mAttrs.surfaceInsets.left;
+        final int surfaceInsetTop = mWin.mAttrs.surfaceInsets.top;
+
+        if (spec != null && !spec.isNop()) {
+            float scale = spec.scale;
+            transform.postScale(scale, scale);
+            transform.postTranslate(spec.offsetX, spec.offsetY);
+
+            // As we are scaling the whole surface, to keep the content
+            // in the same position we will also have to scale the surfaceInsets.
+            transform.postTranslate(-(surfaceInsetLeft*scale - surfaceInsetLeft),
+                    -(surfaceInsetTop*scale - surfaceInsetTop));
+        }
+    }
+
     void computeShownFrameLocked() {
         final boolean selfTransformation = mHasLocalTransformation;
         Transformation attachedTransformation =
@@ -1016,10 +1032,7 @@
             if (mService.mAccessibilityController != null && displayId == DEFAULT_DISPLAY) {
                 MagnificationSpec spec = mService.mAccessibilityController
                         .getMagnificationSpecForWindowLocked(mWin);
-                if (spec != null && !spec.isNop()) {
-                    tmpMatrix.postScale(spec.scale, spec.scale);
-                    tmpMatrix.postTranslate(spec.offsetX, spec.offsetY);
-                }
+                applyMagnificationSpec(spec, tmpMatrix);
             }
 
             // "convert" it into SurfaceFlinger's format
@@ -1118,10 +1131,7 @@
             tmpMatrix.setScale(mWin.mGlobalScale, mWin.mGlobalScale);
             tmpMatrix.postTranslate(frame.left + mWin.mXOffset, frame.top + mWin.mYOffset);
 
-            if (spec != null && !spec.isNop()) {
-                tmpMatrix.postScale(spec.scale, spec.scale);
-                tmpMatrix.postTranslate(spec.offsetX, spec.offsetY);
-            }
+            applyMagnificationSpec(spec, tmpMatrix);
 
             tmpMatrix.getValues(tmpFloats);