1 files changed, 108 insertions, 0 deletions
diff --git a/core/java/android/view/NotificationHeaderView.java b/core/java/android/view/NotificationHeaderView.java
new file mode 100644
index 000000000000..659820fba33c
--- /dev/null
+++ b/core/java/android/view/NotificationHeaderView.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2015 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 android.view;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+import android.widget.LinearLayout;
+import android.widget.RemoteViews;
+
+import com.android.internal.R;
+
+/**
+ * A header of a notification view
+ *
+ * @hide
+ */
+@RemoteViews.RemoteView
+public class NotificationHeaderView extends LinearLayout {
+    private final int mHeaderMinWidth;
+    private View mAppName;
+    private View mSubTextView;
+
+    public NotificationHeaderView(Context context) {
+        this(context, null);
+    }
+
+    public NotificationHeaderView(Context context, @Nullable AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public NotificationHeaderView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public NotificationHeaderView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        mHeaderMinWidth = getResources().getDimensionPixelSize(
+                com.android.internal.R.dimen.notification_header_shrink_min_width);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        mAppName = findViewById(com.android.internal.R.id.app_name_text);
+        mSubTextView = findViewById(com.android.internal.R.id.header_sub_text);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        final int givenWidth = MeasureSpec.getSize(widthMeasureSpec);
+        final int givenHeight = MeasureSpec.getSize(heightMeasureSpec);
+        int wrapContentWidthSpec = MeasureSpec.makeMeasureSpec(givenWidth,
+                MeasureSpec.AT_MOST);
+        int wrapContentHeightSpec = MeasureSpec.makeMeasureSpec(givenHeight,
+                MeasureSpec.AT_MOST);
+        int totalWidth = getPaddingStart() + getPaddingEnd();
+        for (int i = 0; i < getChildCount(); i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() == GONE) {
+                // We'll give it the rest of the space in the end
+                continue;
+            }
+            final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
+            int childWidthSpec = getChildMeasureSpec(wrapContentWidthSpec,
+                    lp.leftMargin + lp.rightMargin, lp.width);
+            int childHeightSpec = getChildMeasureSpec(wrapContentHeightSpec,
+                    lp.topMargin + lp.bottomMargin, lp.height);
+            child.measure(childWidthSpec, childHeightSpec);
+            totalWidth += lp.leftMargin + lp.rightMargin + child.getMeasuredWidth();
+        }
+        if (totalWidth > givenWidth) {
+            int overFlow = totalWidth - givenWidth;
+            // We are overflowing, lets shrink
+            final int appWidth = mAppName.getMeasuredWidth();
+            if (appWidth > mHeaderMinWidth) {
+                int newSize = appWidth - Math.min(appWidth - mHeaderMinWidth, overFlow);
+                int childWidthSpec = MeasureSpec.makeMeasureSpec(newSize, MeasureSpec.AT_MOST);
+                mAppName.measure(childWidthSpec, wrapContentHeightSpec);
+                overFlow -= appWidth - newSize;
+            }
+            if (overFlow > 0 && mSubTextView.getVisibility() != GONE) {
+                // we're still too big
+                final int subTextWidth = mSubTextView.getMeasuredWidth();
+                int newSize = Math.max(0, subTextWidth - overFlow);
+                int childWidthSpec = MeasureSpec.makeMeasureSpec(newSize, MeasureSpec.AT_MOST);
+                mSubTextView.measure(childWidthSpec, wrapContentHeightSpec);
+            }
+            totalWidth = givenWidth;
+        }
+        setMeasuredDimension(totalWidth, givenHeight);
+    }
+}