ui: Cleanup class/struct forward declarations

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelTextViewInflater.java

Index: chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelTextViewInflater.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelTextViewInflater.java b/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelTextViewInflater.java
new file mode 100644
index 0000000000000000000000000000000000000000..97eb0e8391c188ca8f866e9b2765c59f8c2c0a09
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelTextViewInflater.java
@@ -0,0 +1,88 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.compositor.bottombar;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.util.LayoutDirection;
+import android.view.Gravity;
+import android.view.View;
+import android.view.View.OnLayoutChangeListener;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import org.chromium.ui.base.LocalizationUtils;
+import org.chromium.ui.resources.dynamics.DynamicResourceLoader;
+
+/**
+ * Provides an {@link OverlayPanelInflater} that adjusts a text view to override the RTL/LTR
+ * ordering when the initial text fragment is short.
+ * Details in this issue: crbug.com/651389.
+ */
+public abstract class OverlayPanelTextViewInflater
+        extends OverlayPanelInflater implements OnLayoutChangeListener {
+    private static final float SHORTNESS_FACTOR = 0.5f;
+
+    private boolean mDidAdjustViewDirection;
+
+    /**
+     * Constructs an instance similar to an {@link OverlayPanelInflater} that can adjust the RTL/LTR
+     * ordering of text fragments whose initial values are considered short relative to the width
+     * of the view.
+     */
+    public OverlayPanelTextViewInflater(OverlayPanel panel, int layoutId, int viewId,
+            Context context, ViewGroup container, DynamicResourceLoader resourceLoader) {
+        super(panel, layoutId, viewId, context, container, resourceLoader);
+    }
+
+    /**
+     * Subclasses must override to return the {@link TextView} once it's inflated.
+     * @return The {@link TextView} or {@code null} if not yet inflated.
+     */
+    protected abstract TextView getTextView();
+
+    //========================================================================================
+    // OverlayPanelInflater overrides
+    //========================================================================================
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+
+        View view = getView();
+        view.addOnLayoutChangeListener(this);
+    }
+
+    @Override
+    public void onLayoutChange(View view, int left, int top, int right, int bottom, int oldLeft,
+            int oldTop, int oldRight, int oldBottom) {
+        TextView textView = getTextView();
+        if (!mDidAdjustViewDirection && textView != null) {
+            // We only adjust the view once, based on the initial value set at layout time.
+            mDidAdjustViewDirection = true;
+            adjustViewDirection(textView);
+        }
+    }
+
+    //========================================================================================
+    // Private methods
+    //========================================================================================
+
+    /**
+     * Adjusts the given {@code TextView} to have a layout direction that matches the UI direction
+     * when the contents of the view is considered short (based on SHORTNESS_FACTOR).
+     * @param textView The text view to adjust.
+     */
+    @SuppressLint("RtlHardcoded")
+    private void adjustViewDirection(TextView textView) {
+        float textWidth = textView.getPaint().measureText(textView.getText().toString());
+        if (textWidth < SHORTNESS_FACTOR * textView.getWidth()) {
+            int layoutDirection =
+                    LocalizationUtils.isLayoutRtl() ? LayoutDirection.RTL : LayoutDirection.LTR;
+            if (layoutDirection == LayoutDirection.LTR) textView.setGravity(Gravity.LEFT);
+            if (layoutDirection == LayoutDirection.RTL) textView.setGravity(Gravity.RIGHT);
+        }
+    }
+}