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/*
* Copyright (C) 2011 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 com.android.browser.preferences;
import com.android.browser.BrowserSettings;
import com.android.browser.PreferenceKeys;
import com.android.browser.R;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.content.res.Resources;
import android.preference.Preference;
import android.preference.PreferenceManager;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebSettings;
import android.webkit.WebView;
public class WebViewPreview extends Preference implements OnSharedPreferenceChangeListener {
static final String HTML_FORMAT = "<html><head><style type=\"text/css\">p { margin: 2px auto;}</style><body><p style=\"font-size: 4pt\">%s</p><p style=\"font-size: 8pt\">%s</p><p style=\"font-size: 10pt\">%s</p><p style=\"font-size: 14pt\">%s</p><p style=\"font-size: 18pt\">%s</p></body></html>";
String mHtml;
private WebView mWebView;
public WebViewPreview(
Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
public WebViewPreview(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public WebViewPreview(Context context) {
super(context);
init(context);
}
void init(Context context) {
Resources res = context.getResources();
Object[] visualNames = res.getStringArray(R.array.pref_text_size_choices);
mHtml = String.format(HTML_FORMAT, visualNames);
setLayoutResource(R.layout.webview_preview);
}
void updatePreview() {
if (mWebView == null) return;
WebSettings ws = mWebView.getSettings();
BrowserSettings bs = BrowserSettings.getInstance();
ws.setMinimumFontSize(bs.getMinimumFontSize());
ws.setTextZoom(bs.getTextZoom());
ws.setProperty(PreferenceKeys.PREF_INVERTED_CONTRAST, Float.toString(bs.getInvertedContrast()));
mWebView.loadData(mHtml, "text/html", "utf-8");
}
@Override
protected View onCreateView(ViewGroup parent) {
View root = super.onCreateView(parent);
WebView webView = (WebView) root.findViewById(R.id.webview);
webView.setFocusable(false);
webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
return root;
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
mWebView = (WebView) view.findViewById(R.id.webview);
updatePreview();
}
@Override
protected void onAttachedToHierarchy(PreferenceManager preferenceManager) {
super.onAttachedToHierarchy(preferenceManager);
getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
}
@Override
protected void onPrepareForRemoval() {
getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
super.onPrepareForRemoval();
}
@Override
public void onSharedPreferenceChanged(
SharedPreferences sharedPreferences, String key) {
updatePreview();
}
}
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