1 /*
2  * Copyright (C) 2013 Google Inc.
3  * Licensed to The Android Open Source Project.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *      http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 package com.android.mail.utils;
19 
20 import android.content.res.Resources;
21 import android.webkit.WebSettings;
22 
23 import com.android.mail.R;
24 
25 public class ConversationViewUtils {
setTextZoom(Resources resources, WebSettings settings)26     public static void setTextZoom(Resources resources, WebSettings settings) {
27         final float fontScale = resources.getConfiguration().fontScale;
28         final int desiredFontSizePx = resources.getInteger(
29                 R.integer.conversation_desired_font_size_px);
30         final int unstyledFontSizePx = resources.getInteger(
31                 R.integer.conversation_unstyled_font_size_px);
32 
33         int textZoom = settings.getTextZoom();
34         // apply a correction to the default body text style to get regular text to the size we want
35         textZoom = textZoom * desiredFontSizePx / unstyledFontSizePx;
36         // then apply any system font scaling
37         textZoom = (int) (textZoom * fontScale);
38         settings.setTextZoom(textZoom);
39     }
40 }
41