The Tor Browser: mobile/android/base/preferences/FontSizePreference.java@fc2d59ddac77 (annotated)

mobile/android/base/preferences/FontSizePreference.java@fc2d59ddac77 (annotated)

mobile/android/base/preferences/FontSizePreference.java

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /* -*- Mode: Java; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: nil; -*-
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 package org.mozilla.gecko.preferences;
 import org.mozilla.gecko.R;
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Color;
 import android.preference.DialogPreference;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.TypedValue;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.ScrollView;
 import android.widget.TextView;
 import java.util.HashMap;
 class FontSizePreference extends DialogPreference {
     private static final String LOGTAG = "FontSizePreference";
     private static final int TWIP_TO_PT_RATIO = 20; // 20 twip = 1 point.
     private static final int PREVIEW_FONT_SIZE_UNIT = TypedValue.COMPLEX_UNIT_PT;
     private static final int DEFAULT_FONT_INDEX = 2;
     private final Context mContext;
     /** Container for mPreviewFontView to allow for scrollable padding at the top of the view. */
     private ScrollView mScrollingContainer;
     private TextView mPreviewFontView;
     private Button mIncreaseFontButton;
     private Button mDecreaseFontButton;
     private final String[] mFontTwipValues;
     private final String[] mFontSizeNames; // Ex: "Small".
     /** Index into the above arrays for the saved preference value (from Gecko). */
     private int mSavedFontIndex = DEFAULT_FONT_INDEX;
     /** Index into the above arrays for the currently displayed font size (the preview). */
     private int mPreviewFontIndex = mSavedFontIndex;
     private final HashMap<String, Integer> mFontTwipToIndexMap;
     public FontSizePreference(Context context, AttributeSet attrs) {
         super(context, attrs);
         mContext = context;
         final Resources res = mContext.getResources();
         mFontTwipValues = res.getStringArray(R.array.pref_font_size_values);
         mFontSizeNames = res.getStringArray(R.array.pref_font_size_entries);
         mFontTwipToIndexMap = new HashMap<String, Integer>();
         for (int i = 0; i < mFontTwipValues.length; ++i) {
             mFontTwipToIndexMap.put(mFontTwipValues[i], i);
         }
     }
     @Override
     protected void onPrepareDialogBuilder(AlertDialog.Builder builder) {
         final LayoutInflater inflater =
             (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         View dialogView = inflater.inflate(R.layout.font_size_preference, null);
         initInternalViews(dialogView);
         updatePreviewFontSize(mFontTwipValues[mPreviewFontIndex]);
         builder.setTitle(null);
         builder.setView(dialogView);
     }
     /** Saves relevant views to instance variables and initializes their settings. */
     private void initInternalViews(View dialogView) {
         mScrollingContainer = (ScrollView) dialogView.findViewById(R.id.scrolling_container);
         // Background cannot be set in XML (see bug 783597 - TODO: Change this to XML when bug is fixed).
         mScrollingContainer.setBackgroundColor(Color.WHITE);
         mPreviewFontView = (TextView) dialogView.findViewById(R.id.preview);
         mDecreaseFontButton = (Button) dialogView.findViewById(R.id.decrease_preview_font_button);
         mIncreaseFontButton = (Button) dialogView.findViewById(R.id.increase_preview_font_button);
         setButtonState(mPreviewFontIndex);
         mDecreaseFontButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 mPreviewFontIndex = Math.max(mPreviewFontIndex - 1, 0);
                 updatePreviewFontSize(mFontTwipValues[mPreviewFontIndex]);
                 mIncreaseFontButton.setEnabled(true);
                 // If we reached the minimum index, disable the button.
                 if (mPreviewFontIndex == 0) {
                     mDecreaseFontButton.setEnabled(false);
                 }
             }
         });
         mIncreaseFontButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 mPreviewFontIndex = Math.min(mPreviewFontIndex + 1, mFontTwipValues.length - 1);
                 updatePreviewFontSize(mFontTwipValues[mPreviewFontIndex]);
                 mDecreaseFontButton.setEnabled(true);
                 // If we reached the maximum index, disable the button.
                 if (mPreviewFontIndex == mFontTwipValues.length - 1) {
                     mIncreaseFontButton.setEnabled(false);
                 }
             }
         });
     }
     @Override
     protected void onDialogClosed(boolean positiveResult) {
         super.onDialogClosed(positiveResult);
         if (!positiveResult) {
             mPreviewFontIndex = mSavedFontIndex;
             return;
         }
         mSavedFontIndex = mPreviewFontIndex;
         final String twipVal = mFontTwipValues[mSavedFontIndex];
         final OnPreferenceChangeListener prefChangeListener = getOnPreferenceChangeListener();
         if (prefChangeListener == null) {
             Log.e(LOGTAG, "PreferenceChangeListener is null. FontSizePreference will not be saved to Gecko.");
             return;
         }
         prefChangeListener.onPreferenceChange(this, twipVal);
     }
     /**
      * Finds the index of the given twip value and sets it as the saved preference value. Also the
      * current preview text size to the given value. Does not update the mPreviewFontView text size.
      */
     protected void setSavedFontSize(String twip) {
         final Integer index = mFontTwipToIndexMap.get(twip);
         if (index != null) {
             mSavedFontIndex = index;
             mPreviewFontIndex = mSavedFontIndex;
             return;
         }
         resetSavedFontSizeToDefault();
         Log.e(LOGTAG, "setSavedFontSize: Given font size does not exist in twip values map. Reverted to default font size.");
     }
     /**
      * Updates the mPreviewFontView to the given text size, resets the container's scroll to the top
      * left, and invalidates the view. Does not update the font indices.
      */
     private void updatePreviewFontSize(String twip) {
         float pt = convertTwipStrToPT(twip);
         // Android will not render a font size of 0 pt but for Gecko, 0 twip turns off font
         // inflation. Thus we special case 0 twip to display a renderable font size.
         if (pt == 0) {
             // Android adds an inexplicable extra margin on the smallest font size so to get around
             // this, we reinflate the view.
             ViewGroup parentView = (ViewGroup) mScrollingContainer.getParent();
             parentView.removeAllViews();
             final LayoutInflater inflater =
                 (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             View dialogView = inflater.inflate(R.layout.font_size_preference, parentView);
             initInternalViews(dialogView);
             mPreviewFontView.setTextSize(PREVIEW_FONT_SIZE_UNIT, 1);
         } else {
             mPreviewFontView.setTextSize(PREVIEW_FONT_SIZE_UNIT, pt);
         }
         mScrollingContainer.scrollTo(0, 0);
     }
     /**
      * Resets the font indices to the default value. Does not update the mPreviewFontView text size.
      */
     private void resetSavedFontSizeToDefault() {
         mSavedFontIndex = DEFAULT_FONT_INDEX;
         mPreviewFontIndex = mSavedFontIndex;
     }
     private void setButtonState(int index) {
         if (index == 0) {
             mDecreaseFontButton.setEnabled(false);
         } else if (index == mFontTwipValues.length - 1) {
             mIncreaseFontButton.setEnabled(false);
         }
     }
     /**
      * Returns the name of the font size (ex: "Small") at the currently saved preference value.
      */
     protected String getSavedFontSizeName() {
         return mFontSizeNames[mSavedFontIndex];
     }
     private float convertTwipStrToPT(String twip) {
         return Float.parseFloat(twip) / TWIP_TO_PT_RATIO;
     }
 }

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mobile/android/base/preferences/FontSizePreference.java@fc2d59ddac77 (annotated)

mobile/android/base/preferences/FontSizePreference.java