Revert of [Andorid] Migrate to ClipDrawable progress bar.

chrome/android/java/src/org/chromium/chrome/browser/widget/ClipDrawableProgressBar.java

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/ClipDrawableProgressBar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/ClipDrawableProgressBar.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/ClipDrawableProgressBar.java
deleted file mode 100644
index eabd8e3fa80c023bace448cfc7261f561d89fa75..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/widget/ClipDrawableProgressBar.java
+++ /dev/null
@@ -1,248 +0,0 @@
-// Copyright 2015 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.widget;
-
-import android.content.Context;
-import android.content.res.TypedArray;
-import android.graphics.Color;
-import android.graphics.Rect;
-import android.graphics.drawable.ClipDrawable;
-import android.graphics.drawable.ColorDrawable;
-import android.support.v4.view.ViewCompat;
-import android.util.AttributeSet;
-import android.view.Gravity;
-import android.widget.ImageView;
-
-import org.chromium.base.ApiCompatibilityUtils;
-import org.chromium.chrome.R;
-
-/**
- * An alternative progress bar implemented using ClipDrawable for simplicity and performance.
- */
-public class ClipDrawableProgressBar extends ImageView {
-
-    // ClipDrawable's max is a fixed constant 10000.
-    // http://developer.android.com/reference/android/graphics/drawable/ClipDrawable.html
-    private static final int CLIP_DRAWABLE_MAX = 10000;
-
-    private final Rect mDirtyBound = new Rect();
-    private InvalidationListener mListener;
-    private int mProgressBarColor = Color.TRANSPARENT;
-    private int mBackgroundColor = Color.TRANSPARENT;
-    private boolean mIsLastInvalidationProgressChange;
-    private float mProgress;
-    private int mDesiredVisibility;
-
-    /**
-     * Interface for listening to drawing invalidation.
-     */
-    public interface InvalidationListener {
-        /**
-         * Called on drawing invalidation.
-         * @param dirtyRect Invalidated area.
-         */
-        void onInvalidation(Rect dirtyRect);
-    }
-
-    /**
-     * Constructor for inflating from XML.
-     */
-    public ClipDrawableProgressBar(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        init(context, attrs, 0);
-    }
-
-    private void init(Context context, AttributeSet attrs, int defStyle) {
-        mDesiredVisibility = getVisibility();
-
-        assert attrs != null;
-        TypedArray a = context.obtainStyledAttributes(
-                attrs, R.styleable.ClipDrawableProgressBar, defStyle, 0);
-        mProgressBarColor = a.getColor(
-                R.styleable.ClipDrawableProgressBar_progressBarColor, Color.TRANSPARENT);
-        assert mProgressBarColor != Color.TRANSPARENT;
-        mBackgroundColor = a.getColor(
-                R.styleable.ClipDrawableProgressBar_backgroundColor, Color.TRANSPARENT);
-        a.recycle();
-
-        setImageDrawable(new ClipDrawable(new ColorDrawable(mProgressBarColor), Gravity.START,
-                ClipDrawable.HORIZONTAL));
-        setBackgroundColor(mBackgroundColor);
-    }
-
-    /**
-     * Get the progress bar's current level of progress.
-     *
-     * @return The current progress, between 0.0 and 1.0.
-     */
-    public float getProgress() {
-        return mProgress;
-    }
-
-    /**
-     * Set the current progress to the specified value.
-     *
-     * @param progress The new progress, between 0.0 and 1.0.
-     */
-    public void setProgress(float progress) {
-        assert 0.0f <= progress && progress <= 1.0f;
-        if (mProgress == progress) return;
-
-        float currentProgress = mProgress;
-        mProgress = progress;
-        getDrawable().setLevel(Math.round(progress * CLIP_DRAWABLE_MAX));
-
-        if (getVisibility() == VISIBLE && mListener != null) {
-            if (mIsLastInvalidationProgressChange) {
-                float left = Math.min(currentProgress, progress);
-                float right = Math.max(currentProgress, progress);
-
-                if (ApiCompatibilityUtils.isLayoutRtl(this)) {
-                    float leftTemp = left;
-                    left = 1.0f - right;
-                    right = 1.0f - leftTemp;
-                }
-
-                mDirtyBound.set((int) (left * getWidth()), 0,
-                        (int) Math.ceil(right * getWidth()), getHeight());
-                mListener.onInvalidation(mDirtyBound);
-            } else {
-                mListener.onInvalidation(null);
-            }
-
-            mIsLastInvalidationProgressChange = true;
-        }
-    }
-
-    /**
-     * @return Background color of this progress bar.
-     */
-    public int getProgressBarBackgroundColor() {
-        return mBackgroundColor;
-    }
-
-    /**
-     * Adds an observer to be notified of drawing invalidation.
-     *
-     * @param listener The observer to be added.
-     */
-    public void setInvalidationListener(InvalidationListener listener) {
-        mListener = listener;
-        mIsLastInvalidationProgressChange = false;
-    }
-
-    /**
-     * Get a rect that contains all the non-opaque pixels.
-     * @param alphaBound Instance used to return the result.
-     */
-    public void getAlphaDrawRegion(Rect alphaBound) {
-        if (getAlpha() < 1.0f) {
-            alphaBound.set(0, 0, getWidth(), getHeight());
-            return;
-        }
-
-        alphaBound.setEmpty();
-        if (Color.alpha(mBackgroundColor) < 255) {
-            if (ApiCompatibilityUtils.isLayoutRtl(this)) {
-                alphaBound.set(0, 0, (int) Math.ceil(mProgress * getWidth()), getHeight());
-            } else {
-                alphaBound.set((int) (mProgress * getWidth()), 0, getWidth(), getHeight());
-            }
-        }
-        if (Color.alpha(mProgressBarColor) < 255) {
-            if (ApiCompatibilityUtils.isLayoutRtl(this)) {
-                alphaBound.union((int) (mProgress * getWidth()), 0, getWidth(), getHeight());
-            } else {
-                alphaBound.union(0, 0, (int) Math.ceil(mProgress * getWidth()), getHeight());
-            }
-        }
-
-        return;
-    }
-
-    /**
-     * @return Whether the actual internal visibility is changed.
-     */
-    private boolean updateInternalVisibility() {
-        int oldVisibility = getVisibility();
-        int newVisibility = mDesiredVisibility;
-        if (getAlpha() == 0 && mDesiredVisibility == VISIBLE) {
-            newVisibility = INVISIBLE;
-        }
-
-        if (oldVisibility != newVisibility) {
-            super.setVisibility(newVisibility);
-            if (mListener != null) {
-                mListener.onInvalidation(null);
-                mIsLastInvalidationProgressChange = false;
-            }
-            return true;
-        }
-
-        return false;
-    }
-
-    // View implementations.
-
-    /**
-     * Note that this visibility might not be respected for optimization. For example, if alpha
-     * is 0, it will remain View#INVISIBLE even if this is called with View#VISIBLE.
-     */
-    @Override
-    public void setVisibility(int visibility) {
-        mDesiredVisibility = visibility;
-        updateInternalVisibility();
-    }
-
-    @Override
-    public void setBackgroundColor(int color) {
-        if (color == Color.TRANSPARENT) {
-            setBackground(null);
-        } else {
-            super.setBackgroundColor(color);
-        }
-
-        mBackgroundColor = color;
-
-        if (mListener != null && getVisibility() == VISIBLE) {
-            mListener.onInvalidation(null);
-            mIsLastInvalidationProgressChange = false;
-        }
-    }
-
-    @Override
-    protected boolean onSetAlpha(int alpha) {
-        boolean result = super.onSetAlpha(alpha);
-
-        if (mListener != null && !updateInternalVisibility()) {
-            mListener.onInvalidation(null);
-            mIsLastInvalidationProgressChange = false;
-        }
-
-        return result;
-    }
-
-    @Override
-    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
-        super.onSizeChanged(w, h, oldw, oldh);
-
-        if (mListener != null && getVisibility() == VISIBLE && (w != oldw || h != oldh)) {
-            mListener.onInvalidation(null);
-            mIsLastInvalidationProgressChange = false;
-        }
-    }
-
-    @Override
-    public void onRtlPropertiesChanged(int layoutDirection) {
-        int currentLayoutDirection = ViewCompat.getLayoutDirection(this);
-        super.onRtlPropertiesChanged(layoutDirection);
-
-        if (mListener != null && getVisibility() == VISIBLE
-                && currentLayoutDirection != layoutDirection) {
-            mListener.onInvalidation(null);
-            mIsLastInvalidationProgressChange = false;
-        }
-    }
-}