com.handmark.pulltorefresh.library.PullToRefreshWebView Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright 2011, 2012 Chris Banes.
 *
 * 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.handmark.pulltorefresh.library;

import android.content.Context;
import android.util.AttributeSet;
import android.util.FloatMath;
import android.webkit.WebChromeClient;
import android.webkit.WebView;

public class PullToRefreshWebView extends PullToRefreshBase {

	private static final OnRefreshListener defaultOnRefreshListener = new OnRefreshListener() {

		@Override
		public void onRefresh(PullToRefreshBase refreshView) {
			refreshView.getRefreshableView().reload();
		}
	};

	private final WebChromeClient defaultWebChromeClient = new WebChromeClient() {

		@Override
		public void onProgressChanged(WebView view, int newProgress) {
			if (newProgress == 100) {
				onRefreshComplete();
			}
		}

	};

	public PullToRefreshWebView(Context context) {
		super(context);

		/**
		 * Added so that by default, Pull-to-Refresh refreshes the page
		 */
		setOnRefreshListener(defaultOnRefreshListener);
		mRefreshableView.setWebChromeClient(defaultWebChromeClient);
	}

	public PullToRefreshWebView(Context context, AttributeSet attrs) {
		super(context, attrs);

		/**
		 * Added so that by default, Pull-to-Refresh refreshes the page
		 */
		setOnRefreshListener(defaultOnRefreshListener);
		mRefreshableView.setWebChromeClient(defaultWebChromeClient);
	}

	public PullToRefreshWebView(Context context, Mode mode) {
		super(context, mode);

		/**
		 * Added so that by default, Pull-to-Refresh refreshes the page
		 */
		setOnRefreshListener(defaultOnRefreshListener);
		mRefreshableView.setWebChromeClient(defaultWebChromeClient);
	}

	@Override
	protected WebView createRefreshableView(Context context, AttributeSet attrs) {
		WebView webView = new WebView(context, attrs);

		webView.setId(R.id.webview);
		return webView;
	}

	@Override
	protected boolean isReadyForPullDown() {
		return mRefreshableView.getScrollY() == 0;
	}

	@Override
	protected boolean isReadyForPullUp() {
		float exactContentHeight = FloatMath.floor(mRefreshableView.getContentHeight() * mRefreshableView.getScale());
		return mRefreshableView.getScrollY() >= (exactContentHeight - mRefreshableView.getHeight());
	}
}