104 lines
3.1 KiB
Java
104 lines
3.1 KiB
Java
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.support.v7.internal.view;
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import android.content.Context;
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import android.content.ContextWrapper;
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import android.content.res.Resources;
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import android.support.v7.appcompat.R;
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import android.view.LayoutInflater;
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/**
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* A ContextWrapper that allows you to modify the theme from what is in the
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* wrapped context.
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*
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* @hide
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*/
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public class ContextThemeWrapper extends ContextWrapper {
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private int mThemeResource;
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private Resources.Theme mTheme;
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private LayoutInflater mInflater;
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public ContextThemeWrapper(Context base, int themeres) {
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super(base);
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mThemeResource = themeres;
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}
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@Override
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public void setTheme(int resid) {
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mThemeResource = resid;
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initializeTheme();
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}
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public int getThemeResId() {
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return mThemeResource;
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}
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@Override
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public Resources.Theme getTheme() {
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if (mTheme != null) {
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return mTheme;
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}
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if (mThemeResource == 0) {
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mThemeResource = R.style.Theme_AppCompat_Light;
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}
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initializeTheme();
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return mTheme;
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}
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@Override
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public Object getSystemService(String name) {
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if (LAYOUT_INFLATER_SERVICE.equals(name)) {
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if (mInflater == null) {
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mInflater = LayoutInflater.from(getBaseContext()).cloneInContext(this);
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}
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return mInflater;
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}
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return getBaseContext().getSystemService(name);
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}
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/**
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* Called by {@link #setTheme} and {@link #getTheme} to apply a theme
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* resource to the current Theme object. Can override to change the
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* default (simple) behavior. This method will not be called in multiple
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* threads simultaneously.
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*
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* @param theme The Theme object being modified.
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* @param resid The theme style resource being applied to <var>theme</var>.
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* @param first Set to true if this is the first time a style is being
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* applied to <var>theme</var>.
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*/
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protected void onApplyThemeResource(Resources.Theme theme, int resid, boolean first) {
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theme.applyStyle(resid, true);
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}
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private void initializeTheme() {
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final boolean first = mTheme == null;
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if (first) {
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mTheme = getResources().newTheme();
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Resources.Theme theme = getBaseContext().getTheme();
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if (theme != null) {
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mTheme.setTo(theme);
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}
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}
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onApplyThemeResource(mTheme, mThemeResource, first);
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}
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}
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