tt-rss-android/src/org/fox/ttrss/ArticleFragment.java

package org.fox.ttrss;

import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.fox.ttrss.types.Article;
import org.fox.ttrss.types.Attachment;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Typeface;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.text.Html;
import android.util.Log;
import android.util.TypedValue;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebSettings.LayoutAlgorithm;
import android.webkit.WebView;
import android.webkit.WebView.HitTestResult;
import android.widget.TextView;
import android.widget.AdapterView.AdapterContextMenuInfo;

public class ArticleFragment extends Fragment implements GestureDetector.OnDoubleTapListener {
	private final String TAG = this.getClass().getSimpleName();

	private SharedPreferences m_prefs;
	private Article m_article;
	private OnlineActivity m_activity;
	private GestureDetector m_detector;

	public void initialize(Article article) {
		m_article = article;
	}
	
	private View.OnTouchListener m_gestureListener;
	
	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
	    ContextMenuInfo menuInfo) {

		if (v.getId() == R.id.content) {
			HitTestResult result = ((WebView)v).getHitTestResult();

			if (result != null && (result.getType() == HitTestResult.IMAGE_TYPE || result.getType() == HitTestResult.SRC_IMAGE_ANCHOR_TYPE)) {
				menu.setHeaderTitle(result.getExtra());
				getActivity().getMenuInflater().inflate(R.menu.article_content_img_context_menu, menu);
				
				/* FIXME I have no idea how to do this correctly ;( */
				
				m_activity.setLastContentImageHitTestUrl(result.getExtra());
				
			} else {
				menu.setHeaderTitle(m_article.title);
				getActivity().getMenuInflater().inflate(R.menu.article_link_context_menu, menu);
			}
		} else {
			menu.setHeaderTitle(m_article.title);
			getActivity().getMenuInflater().inflate(R.menu.article_link_context_menu, menu);
		}
		
		super.onCreateContextMenu(menu, v, menuInfo);		
		
	}
	
	@SuppressLint("NewApi")
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    	
		m_activity.setProgressBarVisibility(true);
		
		if (savedInstanceState != null) {
			m_article = savedInstanceState.getParcelable("article");
		}

		final View view = inflater.inflate(R.layout.article_fragment, container, false);

		WebView content = (WebView) view.findViewById(R.id.content);
		
		if (content != null) content.setVisibility(View.INVISIBLE);
		
	    // prevent flicker in ics
	    if (android.os.Build.VERSION.SDK_INT >= 11) {
	    	content.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
	    }
		
		new Handler().postDelayed(new Runnable() {
			@Override
			public void run() {
				if (isAdded()) {
				
					if (m_article != null) {
						
						TextView title = (TextView)view.findViewById(R.id.title);
						
						if (title != null) {
							
							String titleStr;
							
							if (m_article.title.length() > 200)
								titleStr = m_article.title.substring(0, 200) + "...";
							else
								titleStr = m_article.title;
							
							
							title.setText(Html.fromHtml(titleStr));
							//title.setPaintFlags(title.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG);
							title.setOnClickListener(new OnClickListener() {					
								@Override
								public void onClick(View v) {
									try {
										URL url = new URL(m_article.link.trim());
										String uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(),
											url.getPort(), url.getPath(), url.getQuery(), url.getRef()).toString();
										Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
										startActivity(intent);
									} catch (Exception e) {
										e.printStackTrace();
										m_activity.toast(R.string.error_other_error);
									}
								}
							});
							
							registerForContextMenu(title); 
						}
						
						TextView comments = (TextView)view.findViewById(R.id.comments);
						
						if (comments != null) {
							if (m_activity.getApiLevel() >= 4 && m_article.comments_count > 0) {
								String commentsTitle = getString(R.string.article_comments, m_article.comments_count);
								comments.setText(commentsTitle);
								//comments.setPaintFlags(title.getPaintFlags() | Paint.UNDERLINE_TEXT_FLAG);
								comments.setOnClickListener(new OnClickListener() {					
									@Override
									public void onClick(View v) {
										try {
											URL url = new URL((m_article.comments_link != null && m_article.comments_link.length() > 0) ?
												m_article.comments_link : m_article.link);
											String uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(),
													url.getPort(), url.getPath(), url.getQuery(), url.getRef()).toString();
											Intent intent = new Intent(Intent.ACTION_VIEW, 
													Uri.parse(uri));
												startActivity(intent);
										} catch (Exception e) {
											e.printStackTrace();
											m_activity.toast(R.string.error_other_error);
										}
									}
								});
								
							} else {
								comments.setVisibility(View.GONE);					
							}
						}
						
						WebView web = (WebView)view.findViewById(R.id.content);
						
						if (web != null) {
							registerForContextMenu(web);
							
							web.setWebChromeClient(new WebChromeClient() {					
								@Override
				                public void onProgressChanged(WebView view, int progress) {
				                	m_activity.setProgress(Math.round(((float)progress / 100f) * 10000));
				                	if (progress == 100) {
				                		m_activity.setProgressBarVisibility(false);
				                	}
				                }
							});
							
							web.setOnTouchListener(new View.OnTouchListener() {
								@Override
								public boolean onTouch(View v, MotionEvent event) {
									return m_detector.onTouchEvent(event);
								}
							});
							
							String content;
							String cssOverride = "";
							
							WebSettings ws = web.getSettings();
							ws.setSupportZoom(true);
							ws.setBuiltInZoomControls(false);

							web.getSettings().setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN);

							TypedValue tv = new TypedValue();				
						    getActivity().getTheme().resolveAttribute(R.attr.linkColor, tv, true);
						    
							if (m_prefs.getString("theme", "THEME_DARK").equals("THEME_DARK")) {
								cssOverride = "body { background : transparent; color : #e0e0e0}";
							} else if (m_prefs.getString("theme", "THEME_DARK").equals("THEME_DARK_GRAY")) {
								cssOverride = "body { background : transparent; color : #e0e0e0}";
							} else {
								cssOverride = "body { background : transparent; }";
							}
							web.setBackgroundColor(getResources().getColor(android.R.color.transparent));
							
							String hexColor = String.format("#%06X", (0xFFFFFF & tv.data));
						    cssOverride += " a:link {color: "+hexColor+";} a:visited { color: "+hexColor+";}";

						    cssOverride += " table { width : 100%; }";
						    
							String articleContent = m_article.content != null ? m_article.content : "";
							
							Document doc = Jsoup.parse(articleContent);
							
							if (doc != null) {
								// thanks webview for crashing on <video> tag
								Elements videos = doc.select("video");
								
								for (Element video : videos)
									video.remove();
								
								articleContent = doc.toString();
							}
							
							String align = m_prefs.getBoolean("justify_article_text", true) ? "text-align : justify;" : "";
							
							switch (Integer.parseInt(m_prefs.getString("font_size", "0"))) {
							case 0:
								cssOverride += "body { "+align+" font-size : 14px; } ";
								break;
							case 1:
								cssOverride += "body { "+align+" font-size : 18px; } ";
								break;
							case 2:
								cssOverride += "body { "+align+" font-size : 21px; } ";
								break;		
							}
							
							content = 
								"<html>" +
								"<head>" +
								"<meta content=\"text/html; charset=utf-8\" http-equiv=\"content-type\">" +
								"<style type=\"text/css\">" +
								"body { padding : 0px; margin : 0px; }" +
								cssOverride +
								/* "img { max-width : 98%; height : auto; }" + */
								"</style>" +
								"</head>" +
								"<body>" + articleContent;
							
							if (m_article.attachments != null && m_article.attachments.size() != 0) {
								String flatContent = articleContent.replaceAll("[\r\n]", "");
								boolean hasImages = flatContent.matches(".*?<img[^>+].*?");
								
								for (Attachment a : m_article.attachments) {
									if (a.content_type != null && a.content_url != null) {							
										try {
											if (a.content_type.indexOf("image") != -1 && 
													(!hasImages || m_article.always_display_attachments)) {
												
												URL url = new URL(a.content_url.trim());
												String strUrl = url.toString().trim();

												content += "<p><img src=\"" + strUrl.replace("\"", "\\\"") + "\"></p>";
											}

										} catch (MalformedURLException e) {
											//
										} catch (Exception e) {
											e.printStackTrace();
										}
									}					
								}
							}
							
							content += "<p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p></body></html>";
								
							try {
								web.loadDataWithBaseURL(null, content, "text/html", "utf-8", null);
							} catch (RuntimeException e) {					
								e.printStackTrace();
							}
							
							if (m_activity.isSmallScreen())
								web.setOnTouchListener(m_gestureListener);
							
							web.setVisibility(View.VISIBLE);
						}
						
						TextView dv = (TextView)view.findViewById(R.id.date);
						
						if (dv != null) {
							Date d = new Date(m_article.updated * 1000L);
							DateFormat df = new SimpleDateFormat("MMM dd, HH:mm");
							dv.setText(df.format(d));
						}
						
						TextView tagv = (TextView)view.findViewById(R.id.tags);
									
						if (tagv != null) {
							if (m_article.feed_title != null) {
								tagv.setText(m_article.feed_title);
							} else if (m_article.tags != null) {
								String tagsStr = "";
							
								for (String tag : m_article.tags)
									tagsStr += tag + ", ";
								
								tagsStr = tagsStr.replaceAll(", $", "");
							
								tagv.setText(tagsStr);
							} else {
								tagv.setVisibility(View.GONE);
							}
						}
						
						TextView author = (TextView)view.findViewById(R.id.author);

						if (author != null) {
							if (m_article.author != null && m_article.author.length() > 0) {
								author.setText(getString(R.string.author_formatted, m_article.author));				
							} else {
								author.setVisibility(View.GONE);
							}
						}
					} 
					
				}
			}
		}, 50);
		
		
		return view;    	
	}

	@Override
	public void onDestroy() {
		super.onDestroy();		
	}
	
	@Override
	public void onSaveInstanceState (Bundle out) {		
		super.onSaveInstanceState(out);

		out.putParcelable("article", m_article);
	}

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);		
		
		m_prefs = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
		m_activity = (OnlineActivity)activity;
		//m_article = m_onlineServices.getSelectedArticle(); 
		
		m_detector = new GestureDetector(m_activity, new GestureDetector.OnGestureListener() {			
			@Override
			public boolean onSingleTapUp(MotionEvent e) {
				// TODO Auto-generated method stub
				return false;
			}
			
			@Override
			public void onShowPress(MotionEvent e) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
					float distanceY) {
				// TODO Auto-generated method stub
				return false;
			}
			
			@Override
			public void onLongPress(MotionEvent e) {
				m_activity.openContextMenu(getView());				
			}
			
			@Override
			public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
					float velocityY) {
				// TODO Auto-generated method stub
				return false;
			}
			
			@Override
			public boolean onDown(MotionEvent e) {
				// TODO Auto-generated method stub
				return false;
			}
		});
		
		m_detector.setOnDoubleTapListener(this);
	}

	@Override
	public boolean onDoubleTap(MotionEvent arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public boolean onDoubleTapEvent(MotionEvent arg0) {
		// TODO Auto-generated method stub
		return false;
	}

	private void onLeftSideTapped() {
		ArticlePager ap = (ArticlePager) m_activity.getSupportFragmentManager().findFragmentByTag(CommonActivity.FRAG_ARTICLE);
		
		if (ap != null && ap.isAdded()) {
			ap.selectArticle(false);
		}
	}
	
	private void onRightSideTapped() {
		ArticlePager ap = (ArticlePager) m_activity.getSupportFragmentManager().findFragmentByTag(CommonActivity.FRAG_ARTICLE);
		
		if (ap != null && ap.isAdded()) {
			ap.selectArticle(true);
		}
	}
	
	@Override
	public boolean onSingleTapConfirmed(MotionEvent e) {

		int width = getView().getWidth();		
		int x = Math.round(e.getX());
		
		if (x <= width/15) {
			onLeftSideTapped();
			return true;
		} else if (x >= width-(width/15)) {
			onRightSideTapped();
			return true;
		} /* else if (!m_activity.isCompatMode()) {
			ActionBar bar = m_activity.getSupportActionBar();
			
			if (bar.isShowing()) {
				bar.hide();
			} else {
				bar.show();
			}
		} */
		return false;
	}

}