The Tor Browser: mobile/android/base/toolbar/ToolbarProgressView.java@b8a032363ba2 (annotated)

mobile/android/base/toolbar/ToolbarProgressView.java@b8a032363ba2 (annotated)

mobile/android/base/toolbar/ToolbarProgressView.java

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * Copyright (C) 2010 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 org.mozilla.gecko.toolbar;
 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Handler;
 import android.os.Message;
 import android.util.AttributeSet;
 import android.widget.ImageView;
 import android.view.View;
 import android.view.animation.Animation;
 /**
  * Progress view used for page loads.
  *
  * Because we're given limited information about the page load progress, the
  * bar also includes incremental animation between each step to improve
  * perceived performance.
  */
 public class ToolbarProgressView extends ImageView {
     private static final int MAX_PROGRESS = 10000;
     private static final int MSG_UPDATE = 0;
     private static final int MSG_HIDE = 1;
     private static final int STEPS = 10;
     private static final int DELAY = 40;
     private static final boolean PRE_HONEYCOMB = Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB;
     private int mTargetProgress;
     private int mIncrement;
     private Rect mBounds;
     private Handler mHandler;
     private int mCurrentProgress;
     public ToolbarProgressView(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
         init(context);
     }
     public ToolbarProgressView(Context context, AttributeSet attrs) {
         super(context, attrs);
         init(context);
     }
     public ToolbarProgressView(Context context) {
         super(context);
         init(context);
     }
     private void init(Context ctx) {
         mBounds = new Rect(0,0,0,0);
         mTargetProgress = 0;
         mHandler = new Handler() {
             @Override
             public void handleMessage(Message msg) {
                 switch (msg.what) {
                     case MSG_UPDATE:
                         mCurrentProgress = Math.min(mTargetProgress, mCurrentProgress + mIncrement);
                         updateBounds();
                         if (mCurrentProgress < mTargetProgress) {
                             final int delay = (mTargetProgress < MAX_PROGRESS) ? DELAY : DELAY / 4;
                             sendMessageDelayed(mHandler.obtainMessage(msg.what), delay);
                         } else if (mCurrentProgress == MAX_PROGRESS) {
                             sendMessageDelayed(mHandler.obtainMessage(MSG_HIDE), DELAY);
                         }
                         break;
                     case MSG_HIDE:
                         setVisibility(View.GONE);
                         break;
                 }
             }
         };
     }
     @Override
     public void setVisibility(int visibility) {
         // On GB/Froyo, setting the visibility to GONE/HIDDEN alone does not
         // work with translations. Calling clearAnimation acts as a workaround.
         if (PRE_HONEYCOMB && visibility != VISIBLE) {
             clearAnimation();
         }
         super.setVisibility(visibility);
     }
     @Override
     public void setAnimation(Animation animation) {
         // On GB/Froyo, setting the animation after hiding the view causes it
         // to reappear. As a workaround, disallow setAnimation from being
         // called if the view is not shown.
         if (PRE_HONEYCOMB && isShown()) {
             super.setAnimation(animation);
         }
     }
     @Override
     public void onLayout(boolean f, int l, int t, int r, int b) {
         mBounds.left = 0;
         mBounds.right = (r - l) * mCurrentProgress / MAX_PROGRESS;
         mBounds.top = 0;
         mBounds.bottom = b - t;
     }
     @Override
     public void onDraw(Canvas canvas) {
         final Drawable d = getDrawable();
         d.setBounds(mBounds);
         d.draw(canvas);
     }
     /**
      * Immediately sets the progress bar to the given progress percentage.
      *
      * @param progress Percentage (0-100) to which progress bar should be set
      */
     void setProgress(int progressPercentage) {
         mCurrentProgress = mTargetProgress = getAbsoluteProgress(progressPercentage);
         updateBounds();
         clearMessages();
     }
     /**
      * Animates the progress bar from the current progress value to the given
      * progress percentage.
      *
      * @param progress Percentage (0-100) to which progress bar should be animated
      */
     void animateProgress(int progressPercentage) {
         final int absoluteProgress = getAbsoluteProgress(progressPercentage);
         if (absoluteProgress <= mTargetProgress) {
             // After we manually click stop, we can still receive page load
             // events (e.g., DOMContentLoaded). Updating for other updates
             // after a STOP event can freeze the progress bar, so guard against
             // that here.
             return;
         }
         mTargetProgress = absoluteProgress;
         mIncrement = (mTargetProgress - mCurrentProgress) / STEPS;
         clearMessages();
         mHandler.sendEmptyMessage(MSG_UPDATE);
     }
     private void clearMessages() {
         mHandler.removeMessages(MSG_UPDATE);
         mHandler.removeMessages(MSG_HIDE);
     }
     private int getAbsoluteProgress(int progressPercentage) {
         if (progressPercentage < 0) {
             return 0;
         }
         if (progressPercentage > 100) {
             return 100;
         }
         return progressPercentage * MAX_PROGRESS / 100;
     }
     private void updateBounds() {
         mBounds.right = getWidth() * mCurrentProgress / MAX_PROGRESS;
         invalidate();
     }
 }

The Tor Browser / annotate

mobile/android/base/toolbar/ToolbarProgressView.java@b8a032363ba2 (annotated)

mobile/android/base/toolbar/ToolbarProgressView.java