Revert of 📰 Adjust the card display depending on the screen width.

chrome/android/java/src/org/chromium/chrome/browser/ntp/UiConfig.java

-// 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.ntp;
-
-import android.content.Context;
-import android.support.annotation.IntDef;
-import android.view.View;
-
-import org.chromium.base.Log;
-import org.chromium.ui.widget.Toast;
-
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Exposes general configuration info about the NTP UI.
- */
-public class UiConfig {
-    /** The different supported UI setups. Observers can register to be notified of changes.*/
-    @Retention(RetentionPolicy.SOURCE)
-    @IntDef({DISPLAY_STYLE_UNDEFINED, DISPLAY_STYLE_NARROW, DISPLAY_STYLE_REGULAR,
-            DISPLAY_STYLE_WIDE})
-    public @interface DisplayStyle {}
-    public static final int DISPLAY_STYLE_UNDEFINED = -1;
-    public static final int DISPLAY_STYLE_NARROW = 0;
-    public static final int DISPLAY_STYLE_REGULAR = 1;
-    public static final int DISPLAY_STYLE_WIDE = 2;
-
-    private static final int REGULAR_CARD_MIN_WIDTH_DP = 360;
-    private static final int WIDE_CARD_MIN_WIDTH_DP = 600;
-
-    private static final String TAG = "Ntp";
-    private static final boolean DEBUG = false;
-
-    @DisplayStyle
-    private int mCurrentDisplayStyle;
-
-    private final List<DisplayStyleObserver> mObservers = new ArrayList<>();
-    private final Context mContext;
-
-    /**
-     * @param referenceView the View we observe to deduce the configuration from.
-     */
-    public UiConfig(View referenceView) {
-        mContext = referenceView.getContext();
-        mCurrentDisplayStyle = computeDisplayStyleForCurrentConfig();
-
-        referenceView.addOnAttachStateChangeListener(new View.OnAttachStateChangeListener() {
-            @Override
-            public void onViewAttachedToWindow(View v) {
-                updateDisplayStyle();
-            }
-
-            @Override
-            public void onViewDetachedFromWindow(View v) {}
-        });
-    }
-
-    /**
-     * Registers a {@link DisplayStyleObserver}. It will be notified right away with the current
-     * display style.
-     */
-    public void addObserver(DisplayStyleObserver observer) {
-        mObservers.add(observer);
-        observer.onDisplayStyleChanged(mCurrentDisplayStyle);
-    }
-
-    /**
-     * Refresh the display style, notify observers of changes.
-     */
-    public void updateDisplayStyle() {
-        @DisplayStyle
-        int newDisplayStyle = computeDisplayStyleForCurrentConfig();
-
-        if (newDisplayStyle == mCurrentDisplayStyle) return;
-
-        mCurrentDisplayStyle = newDisplayStyle;
-        for (DisplayStyleObserver observer : mObservers) {
-            observer.onDisplayStyleChanged(newDisplayStyle);
-        }
-    }
-
-    @DisplayStyle
-    private int computeDisplayStyleForCurrentConfig() {
-        int widthDp = mContext.getResources().getConfiguration().screenWidthDp;
-
-        String debugString;
-
-        @DisplayStyle
-        int newDisplayStyle;
-        if (widthDp < REGULAR_CARD_MIN_WIDTH_DP) {
-            newDisplayStyle = DISPLAY_STYLE_NARROW;
-            if (DEBUG) debugString = String.format("DISPLAY_STYLE_NARROW (w=%ddp)", widthDp);
-        } else if (widthDp >= WIDE_CARD_MIN_WIDTH_DP) {
-            newDisplayStyle = DISPLAY_STYLE_WIDE;
-            if (DEBUG) debugString = String.format("DISPLAY_STYLE_WIDE (w=%ddp)", widthDp);
-        } else {
-            newDisplayStyle = DISPLAY_STYLE_REGULAR;
-            if (DEBUG) debugString = String.format("DISPLAY_STYLE_REGULAR (w=%ddp)", widthDp);
-        }
-
-        if (DEBUG) {
-            Log.d(TAG, debugString);
-            Toast.makeText(mContext, debugString, Toast.LENGTH_SHORT).show();
-        }
-
-        return newDisplayStyle;
-    }
-}