Browse Source

Added a Reading Mode that can be accessed from the menu

Reading Mode utilizes the Snacktory library created by karussel which is
licensed under the Apache 2.0 license.
https://github.com/karussell/snacktory
master
Anthony Restaino 10 years ago
parent
commit
10668a019b
  1. 11
      AndroidManifest.xml
  2. BIN
      libs/jsoup-1.8.1.jar
  3. 34
      res/layout/license_activity.xml
  4. 39
      res/layout/reading_view.xml
  5. 4
      res/menu-xlarge/main.xml
  6. 1
      res/menu/main.xml
  7. 4
      res/values/strings.xml
  8. 16
      src/acr/browser/lightning/BrowserActivity.java
  9. 2
      src/acr/browser/lightning/Constants.java
  10. 4
      src/acr/browser/lightning/LicenseActivity.java
  11. 619
      src/acr/browser/lightning/Reading/ArticleTextExtractor.java
  12. 243
      src/acr/browser/lightning/Reading/Converter.java
  13. 445
      src/acr/browser/lightning/Reading/HtmlFetcher.java
  14. 31
      src/acr/browser/lightning/Reading/ImageResult.java
  15. 216
      src/acr/browser/lightning/Reading/JResult.java
  16. 80
      src/acr/browser/lightning/Reading/MapEntry.java
  17. 174
      src/acr/browser/lightning/Reading/OutputFormatter.java
  18. 29
      src/acr/browser/lightning/Reading/SCache.java
  19. 480
      src/acr/browser/lightning/Reading/SHelper.java
  20. 153
      src/acr/browser/lightning/ReadingActivity.java

11
AndroidManifest.xml

@ -200,6 +200,17 @@
<intent-filter> <intent-filter>
<action android:name="android.intent.action.BOOKMARK" /> <action android:name="android.intent.action.BOOKMARK" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="acr.browser.lightning.ReadingActivity"
android:configChanges="orientation|screenSize|keyboardHidden|keyboard"
android:label="@string/reading_mode"
android:theme="@style/Theme.SettingsTheme" >
<intent-filter>
<action android:name="android.intent.action.READING" />
<category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.DEFAULT" />
</intent-filter> </intent-filter>
</activity> </activity>

BIN
libs/jsoup-1.8.1.jar

Binary file not shown.

34
res/layout/license_activity.xml

@ -141,4 +141,38 @@
android:layout_marginRight="10dp" android:layout_marginRight="10dp"
android:background="#cdcdcd" /> android:background="#cdcdcd" />
<LinearLayout
android:id="@+id/licenseSnactory"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/listChoiceBackgroundIndicator"
android:orientation="vertical"
android:paddingBottom="10dp"
android:paddingTop="10dp" >
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="16dp"
android:text="@string/snacktory"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="16dp"
android:text="@string/apache"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="@color/light" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#cdcdcd" />
</LinearLayout> </LinearLayout>

39
res/layout/reading_view.xml

@ -0,0 +1,39 @@
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<include layout="@layout/toolbar_settings" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:orientation="vertical">
<TextView
android:id="@+id/textViewTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="20dp"
android:gravity="center_horizontal|center_vertical"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="@+id/textViewBody"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="start"
android:text="Medium Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
</LinearLayout>
</ScrollView>
</LinearLayout>

4
res/menu-xlarge/main.xml

@ -65,6 +65,10 @@
android:id="@+id/action_add_bookmark" android:id="@+id/action_add_bookmark"
android:title="@string/action_add_bookmark"> android:title="@string/action_add_bookmark">
</item> </item>
<item
android:id="@+id/action_reading_mode"
android:title="@string/reading_mode">
</item>
<item <item
android:id="@+id/action_settings" android:id="@+id/action_settings"
android:title="@string/settings"> android:title="@string/settings">

1
res/menu/main.xml

@ -23,6 +23,7 @@
<item android:id="@+id/action_copy" android:title="@string/action_copy" ></item> <item android:id="@+id/action_copy" android:title="@string/action_copy" ></item>
<item android:id="@+id/action_bookmarks" android:title="@string/action_bookmarks" ></item> <item android:id="@+id/action_bookmarks" android:title="@string/action_bookmarks" ></item>
<item android:id="@+id/action_add_bookmark" android:title="@string/action_add_bookmark" ></item> <item android:id="@+id/action_add_bookmark" android:title="@string/action_add_bookmark" ></item>
<item android:id="@+id/action_reading_mode" android:title="@string/reading_mode" ></item>
<item android:id="@+id/action_settings" android:title="@string/settings" ></item> <item android:id="@+id/action_settings" android:title="@string/settings" ></item>
</menu> </menu>

4
res/values/strings.xml

@ -198,4 +198,8 @@
<string name="third_party">Block 3rd Party Cookies</string> <string name="third_party">Block 3rd Party Cookies</string>
<string name="available_lollipop">This feature is only available on Android 5.0+</string> <string name="available_lollipop">This feature is only available on Android 5.0+</string>
<string name="color_mode">Enable Color Mode</string> <string name="color_mode">Enable Color Mode</string>
<string name="reading_mode">Reader Mode</string>
<string name="loading">Loading&#8230;</string>
<string name="loading_failed">Couldn\'t load anything from the page.</string>
<string name="snacktory">Snacktory</string>
</resources> </resources>

16
src/acr/browser/lightning/BrowserActivity.java

@ -350,7 +350,7 @@ public class BrowserActivity extends ActionBarActivity implements BrowserControl
}; };
anim.setDuration(300); anim.setDuration(300);
anim.setInterpolator(new DecelerateInterpolator()); anim.setInterpolator(new DecelerateInterpolator());
anim.setAnimationListener(new AnimationListener(){ anim.setAnimationListener(new AnimationListener() {
@Override @Override
public void onAnimationStart(Animation animation) { public void onAnimationStart(Animation animation) {
@ -493,7 +493,7 @@ public class BrowserActivity extends ActionBarActivity implements BrowserControl
@Override @Override
public void onDrawerClosed(View v) { public void onDrawerClosed(View v) {
if(v == mDrawerRight){ if (v == mDrawerRight) {
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED, mDrawerLeft); mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED, mDrawerLeft);
} else { } else {
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED, mDrawerRight); mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED, mDrawerRight);
@ -502,7 +502,7 @@ public class BrowserActivity extends ActionBarActivity implements BrowserControl
@Override @Override
public void onDrawerOpened(View v) { public void onDrawerOpened(View v) {
if(v == mDrawerRight){ if (v == mDrawerRight) {
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, mDrawerLeft); mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, mDrawerLeft);
} else { } else {
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, mDrawerRight); mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, mDrawerRight);
@ -596,6 +596,11 @@ public class BrowserActivity extends ActionBarActivity implements BrowserControl
case R.id.action_find: case R.id.action_find:
findInPage(); findInPage();
return true; return true;
case R.id.action_reading_mode:
Intent read = new Intent(this, ReadingActivity.class);
read.putExtra(Constants.LOAD_READING_URL, mCurrentView.getUrl());
startActivity(read);
return true;
default: default:
return super.onOptionsItemSelected(item); return super.onOptionsItemSelected(item);
} }
@ -912,6 +917,11 @@ public class BrowserActivity extends ActionBarActivity implements BrowserControl
case R.id.action_find: case R.id.action_find:
findInPage(); findInPage();
return true; return true;
case R.id.action_reading_mode:
Intent read = new Intent(this, ReadingActivity.class);
read.putExtra(Constants.LOAD_READING_URL, mCurrentView.getUrl());
startActivity(read);
return true;
default: default:
return super.onOptionsItemSelected(item); return super.onOptionsItemSelected(item);
} }

2
src/acr/browser/lightning/Constants.java

@ -29,6 +29,8 @@ public final class Constants {
public static final String JAVASCRIPT_INVERT_PAGE = "javascript:(function(){var e='img {-webkit-filter: invert(100%);'+'-moz-filter: invert(100%);'+'-o-filter: invert(100%);'+'-ms-filter: invert(100%); }',t=document.getElementsByTagName('head')[0],n=document.createElement('style');if(!window.counter){window.counter=1}else{window.counter++;if(window.counter%2==0){var e='html {-webkit-filter: invert(0%); -moz-filter: invert(0%); -o-filter: invert(0%); -ms-filter: invert(0%); }'}}n.type='text/css';if(n.styleSheet){n.styleSheet.cssText=e}else{n.appendChild(document.createTextNode(e))}t.appendChild(n)})();"; public static final String JAVASCRIPT_INVERT_PAGE = "javascript:(function(){var e='img {-webkit-filter: invert(100%);'+'-moz-filter: invert(100%);'+'-o-filter: invert(100%);'+'-ms-filter: invert(100%); }',t=document.getElementsByTagName('head')[0],n=document.createElement('style');if(!window.counter){window.counter=1}else{window.counter++;if(window.counter%2==0){var e='html {-webkit-filter: invert(0%); -moz-filter: invert(0%); -o-filter: invert(0%); -ms-filter: invert(0%); }'}}n.type='text/css';if(n.styleSheet){n.styleSheet.cssText=e}else{n.appendChild(document.createTextNode(e))}t.appendChild(n)})();";
public static final String JAVASCRIPT_TEXT_REFLOW = "javascript:document.getElementsByTagName('body')[0].style.width=window.innerWidth+'px';"; public static final String JAVASCRIPT_TEXT_REFLOW = "javascript:document.getElementsByTagName('body')[0].style.width=window.innerWidth+'px';";
public static final String LOAD_READING_URL = "ReadingUrl";
public static final String SEPARATOR = "\\|\\$\\|SEPARATOR\\|\\$\\|"; public static final String SEPARATOR = "\\|\\$\\|SEPARATOR\\|\\$\\|";
public static final String HTTP = "http://"; public static final String HTTP = "http://";
public static final String HTTPS = "https://"; public static final String HTTPS = "https://";

4
src/acr/browser/lightning/LicenseActivity.java

@ -30,6 +30,7 @@ public class LicenseActivity extends ActionBarActivity implements View.OnClickLi
findViewById(R.id.licenseAOSP).setOnClickListener(this); findViewById(R.id.licenseAOSP).setOnClickListener(this);
findViewById(R.id.licenseHosts).setOnClickListener(this); findViewById(R.id.licenseHosts).setOnClickListener(this);
findViewById(R.id.licenseOrbot).setOnClickListener(this); findViewById(R.id.licenseOrbot).setOnClickListener(this);
findViewById(R.id.licenseSnactory).setOnClickListener(this);
} }
@Override @Override
@ -47,6 +48,9 @@ public class LicenseActivity extends ActionBarActivity implements View.OnClickLi
case R.id.licenseOrbot: case R.id.licenseOrbot:
actionView("http://www.gnu.org/licenses/lgpl.html"); actionView("http://www.gnu.org/licenses/lgpl.html");
break; break;
case R.id.licenseSnactory:
actionView("http://www.apache.org/licenses/LICENSE-2.0");
break;
} }
} }

619
src/acr/browser/lightning/Reading/ArticleTextExtractor.java

@ -0,0 +1,619 @@
package acr.browser.lightning.Reading;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import android.util.Log;
/**
* This class is thread safe.
*
* @author Alex P (ifesdjeen from jreadability)
* @author Peter Karich
*/
public class ArticleTextExtractor {
// Interessting nodes
private static final Pattern NODES = Pattern.compile("p|div|td|h1|h2|article|section");
// Unlikely candidates
private String unlikelyStr;
private Pattern UNLIKELY;
// Most likely positive candidates
private String positiveStr;
private Pattern POSITIVE;
// Most likely negative candidates
private String negativeStr;
private Pattern NEGATIVE;
private static final Pattern NEGATIVE_STYLE = Pattern
.compile("hidden|display: ?none|font-size: ?small");
private static final Set<String> IGNORED_TITLE_PARTS = new LinkedHashSet<String>() {
{
add("hacker news");
add("facebook");
}
};
private static final OutputFormatter DEFAULT_FORMATTER = new OutputFormatter();
private OutputFormatter formatter = DEFAULT_FORMATTER;
public ArticleTextExtractor() {
setUnlikely("com(bx|ment|munity)|dis(qus|cuss)|e(xtra|[-]?mail)|foot|"
+ "header|menu|re(mark|ply)|rss|sh(are|outbox)|sponsor"
+ "a(d|ll|gegate|rchive|ttachment)|(pag(er|ination))|popup|print|"
+ "login|si(debar|gn|ngle)");
setPositive("(^(body|content|h?entry|main|page|post|text|blog|story|haupt))"
+ "|arti(cle|kel)|instapaper_body");
setNegative("nav($|igation)|user|com(ment|bx)|(^com-)|contact|"
+ "foot|masthead|(me(dia|ta))|outbrain|promo|related|scroll|(sho(utbox|pping))|"
+ "sidebar|sponsor|tags|tool|widget|player|disclaimer|toc|infobox|vcard");
}
public ArticleTextExtractor setUnlikely(String unlikelyStr) {
this.unlikelyStr = unlikelyStr;
UNLIKELY = Pattern.compile(unlikelyStr);
return this;
}
public ArticleTextExtractor addUnlikely(String unlikelyMatches) {
return setUnlikely(unlikelyStr + "|" + unlikelyMatches);
}
public ArticleTextExtractor setPositive(String positiveStr) {
this.positiveStr = positiveStr;
POSITIVE = Pattern.compile(positiveStr);
return this;
}
public ArticleTextExtractor addPositive(String pos) {
return setPositive(positiveStr + "|" + pos);
}
public ArticleTextExtractor setNegative(String negativeStr) {
this.negativeStr = negativeStr;
NEGATIVE = Pattern.compile(negativeStr);
return this;
}
public ArticleTextExtractor addNegative(String neg) {
setNegative(negativeStr + "|" + neg);
return this;
}
public void setOutputFormatter(OutputFormatter formatter) {
this.formatter = formatter;
}
/**
* @param html
* extracts article text from given html string. wasn't tested
* with improper HTML, although jSoup should be able to handle
* minor stuff.
* @returns extracted article, all HTML tags stripped
*/
public JResult extractContent(Document doc) throws Exception {
return extractContent(new JResult(), doc, formatter);
}
public JResult extractContent(Document doc, OutputFormatter formatter) throws Exception {
return extractContent(new JResult(), doc, formatter);
}
public JResult extractContent(String html) throws Exception {
return extractContent(new JResult(), html);
}
public JResult extractContent(JResult res, String html) throws Exception {
return extractContent(res, html, formatter);
}
public JResult extractContent(JResult res, String html, OutputFormatter formatter)
throws Exception {
if (html.isEmpty())
throw new IllegalArgumentException("html string is empty!?");
// http://jsoup.org/cookbook/extracting-data/selector-syntax
return extractContent(res, Jsoup.parse(html), formatter);
}
public JResult extractContent(JResult res, Document doc, OutputFormatter formatter)
throws Exception {
if (doc == null)
throw new NullPointerException("missing document");
res.setTitle(extractTitle(doc));
res.setDescription(extractDescription(doc));
res.setCanonicalUrl(extractCanonicalUrl(doc));
// now remove the clutter
prepareDocument(doc);
// init elements
Collection<Element> nodes = getNodes(doc);
int maxWeight = 0;
Element bestMatchElement = null;
for (Element entry : nodes) {
int currentWeight = getWeight(entry);
if (currentWeight > maxWeight) {
maxWeight = currentWeight;
bestMatchElement = entry;
if (maxWeight > 200)
break;
}
}
if (bestMatchElement != null) {
List<ImageResult> images = new ArrayList<ImageResult>();
Element imgEl = determineImageSource(bestMatchElement, images);
if (imgEl != null) {
res.setImageUrl(SHelper.replaceSpaces(imgEl.attr("src")));
// TODO remove parent container of image if it is contained in
// bestMatchElement
// to avoid image subtitles flooding in
res.setImages(images);
}
// clean before grabbing text
String text = formatter.getFormattedText(bestMatchElement);
text = removeTitleFromText(text, res.getTitle());
// this fails for short facebook post and probably tweets:
// text.length() > res.getDescription().length()
if (text.length() > res.getTitle().length()) {
res.setText(text);
// print("best element:", bestMatchElement);
}
res.setTextList(formatter.getTextList(bestMatchElement));
}
if (res.getImageUrl().isEmpty()) {
res.setImageUrl(extractImageUrl(doc));
}
res.setRssUrl(extractRssUrl(doc));
res.setVideoUrl(extractVideoUrl(doc));
res.setFaviconUrl(extractFaviconUrl(doc));
res.setKeywords(extractKeywords(doc));
return res;
}
protected String extractTitle(Document doc) {
String title = cleanTitle(doc.title());
if (title.isEmpty()) {
title = SHelper.innerTrim(doc.select("head title").text());
if (title.isEmpty()) {
title = SHelper.innerTrim(doc.select("head meta[name=title]").attr("content"));
if (title.isEmpty()) {
title = SHelper.innerTrim(doc.select("head meta[property=og:title]").attr(
"content"));
if (title.isEmpty()) {
title = SHelper.innerTrim(doc.select("head meta[name=twitter:title]").attr(
"content"));
}
}
}
}
return title;
}
protected String extractCanonicalUrl(Document doc) {
String url = SHelper.replaceSpaces(doc.select("head link[rel=canonical]").attr("href"));
if (url.isEmpty()) {
url = SHelper.replaceSpaces(doc.select("head meta[property=og:url]").attr("content"));
if (url.isEmpty()) {
url = SHelper.replaceSpaces(doc.select("head meta[name=twitter:url]").attr(
"content"));
}
}
return url;
}
protected String extractDescription(Document doc) {
String description = SHelper.innerTrim(doc.select("head meta[name=description]").attr(
"content"));
if (description.isEmpty()) {
description = SHelper.innerTrim(doc.select("head meta[property=og:description]").attr(
"content"));
if (description.isEmpty()) {
description = SHelper.innerTrim(doc.select("head meta[name=twitter:description]")
.attr("content"));
}
}
return description;
}
protected Collection<String> extractKeywords(Document doc) {
String content = SHelper.innerTrim(doc.select("head meta[name=keywords]").attr("content"));
if (content != null) {
if (content.startsWith("[") && content.endsWith("]"))
content = content.substring(1, content.length() - 1);
String[] split = content.split("\\s*,\\s*");
if (split.length > 1 || (split.length > 0 && !"".equals(split[0])))
return Arrays.asList(split);
}
return Collections.emptyList();
}
/**
* Tries to extract an image url from metadata if determineImageSource
* failed
*
* @return image url or empty str
*/
protected String extractImageUrl(Document doc) {
// use open graph tag to get image
String imageUrl = SHelper.replaceSpaces(doc.select("head meta[property=og:image]").attr(
"content"));
if (imageUrl.isEmpty()) {
imageUrl = SHelper.replaceSpaces(doc.select("head meta[name=twitter:image]").attr(
"content"));
if (imageUrl.isEmpty()) {
// prefer link over thumbnail-meta if empty
imageUrl = SHelper.replaceSpaces(doc.select("link[rel=image_src]").attr("href"));
if (imageUrl.isEmpty()) {
imageUrl = SHelper.replaceSpaces(doc.select("head meta[name=thumbnail]").attr(
"content"));
}
}
}
return imageUrl;
}
protected String extractRssUrl(Document doc) {
return SHelper.replaceSpaces(doc.select("link[rel=alternate]")
.select("link[type=application/rss+xml]").attr("href"));
}
protected String extractVideoUrl(Document doc) {
return SHelper.replaceSpaces(doc.select("head meta[property=og:video]").attr("content"));
}
protected String extractFaviconUrl(Document doc) {
String faviconUrl = SHelper.replaceSpaces(doc.select("head link[rel=icon]").attr("href"));
if (faviconUrl.isEmpty()) {
faviconUrl = SHelper.replaceSpaces(doc.select(
"head link[rel^=shortcut],link[rel$=icon]").attr("href"));
}
return faviconUrl;
}
/**
* Weights current element. By matching it with positive candidates and
* weighting child nodes. Since it's impossible to predict which exactly
* names, ids or class names will be used in HTML, major role is played by
* child nodes
*
* @param e
* Element to weight, along with child nodes
*/
protected int getWeight(Element e) {
int weight = calcWeight(e);
weight += (int) Math.round(e.ownText().length() / 100.0 * 10);
weight += weightChildNodes(e);
return weight;
}
/**
* Weights a child nodes of given Element. During tests some difficulties
* were met. For instanance, not every single document has nested paragraph
* tags inside of the major article tag. Sometimes people are adding one
* more nesting level. So, we're adding 4 points for every 100 symbols
* contained in tag nested inside of the current weighted element, but only
* 3 points for every element that's nested 2 levels deep. This way we give
* more chances to extract the element that has less nested levels,
* increasing probability of the correct extraction.
*
* @param rootEl
* Element, who's child nodes will be weighted
*/
protected int weightChildNodes(Element rootEl) {
int weight = 0;
Element caption = null;
List<Element> pEls = new ArrayList<Element>(5);
for (Element child : rootEl.children()) {
String ownText = child.ownText();
int ownTextLength = ownText.length();
if (ownTextLength < 20)
continue;
if (ownTextLength > 200)
weight += Math.max(50, ownTextLength / 10);
if (child.tagName().equals("h1") || child.tagName().equals("h2")) {
weight += 30;
} else if (child.tagName().equals("div") || child.tagName().equals("p")) {
weight += calcWeightForChild(child, ownText);
if (child.tagName().equals("p") && ownTextLength > 50)
pEls.add(child);
if (child.className().toLowerCase(Locale.getDefault()).equals("caption"))
caption = child;
}
}
// use caption and image
if (caption != null)
weight += 30;
if (pEls.size() >= 2) {
for (Element subEl : rootEl.children()) {
if ("h1;h2;h3;h4;h5;h6".contains(subEl.tagName())) {
weight += 20;
// headerEls.add(subEl);
} else if ("table;li;td;th".contains(subEl.tagName())) {
addScore(subEl, -30);
}
if ("p".contains(subEl.tagName()))
addScore(subEl, 30);
}
}
return weight;
}
public void addScore(Element el, int score) {
int old = getScore(el);
setScore(el, score + old);
}
public int getScore(Element el) {
int old = 0;
try {
old = Integer.parseInt(el.attr("gravityScore"));
} catch (Exception ex) {
}
return old;
}
public void setScore(Element el, int score) {
el.attr("gravityScore", Integer.toString(score));
}
private int calcWeightForChild(Element child, String ownText) {
int c = SHelper.count(ownText, "&quot;");
c += SHelper.count(ownText, "&lt;");
c += SHelper.count(ownText, "&gt;");
c += SHelper.count(ownText, "px");
int val;
if (c > 5)
val = -30;
else
val = (int) Math.round(ownText.length() / 25.0);
addScore(child, val);
return val;
}
private int calcWeight(Element e) {
int weight = 0;
if (POSITIVE.matcher(e.className()).find())
weight += 35;
if (POSITIVE.matcher(e.id()).find())
weight += 40;
if (UNLIKELY.matcher(e.className()).find())
weight -= 20;
if (UNLIKELY.matcher(e.id()).find())
weight -= 20;
if (NEGATIVE.matcher(e.className()).find())
weight -= 50;
if (NEGATIVE.matcher(e.id()).find())
weight -= 50;
String style = e.attr("style");
if (style != null && !style.isEmpty() && NEGATIVE_STYLE.matcher(style).find())
weight -= 50;
return weight;
}
public Element determineImageSource(Element el, List<ImageResult> images) {
int maxWeight = 0;
Element maxNode = null;
Elements els = el.select("img");
if (els.isEmpty())
els = el.parent().select("img");
double score = 1;
for (Element e : els) {
String sourceUrl = e.attr("src");
if (sourceUrl.isEmpty() || isAdImage(sourceUrl))
continue;
int weight = 0;
int height = 0;
try {
height = Integer.parseInt(e.attr("height"));
if (height >= 50)
weight += 20;
else
weight -= 20;
} catch (Exception ex) {
}
int width = 0;
try {
width = Integer.parseInt(e.attr("width"));
if (width >= 50)
weight += 20;
else
weight -= 20;
} catch (Exception ex) {
}
String alt = e.attr("alt");
if (alt.length() > 35)
weight += 20;
String title = e.attr("title");
if (title.length() > 35)
weight += 20;
String rel = null;
boolean noFollow = false;
if (e.parent() != null) {
rel = e.parent().attr("rel");
if (rel != null && rel.contains("nofollow")) {
noFollow = rel.contains("nofollow");
weight -= 40;
}
}
weight = (int) (weight * score);
if (weight > maxWeight) {
maxWeight = weight;
maxNode = e;
score = score / 2;
}
ImageResult image = new ImageResult(sourceUrl, weight, title, height, width, alt,
noFollow);
images.add(image);
}
Collections.sort(images, new ImageComparator());
return maxNode;
}
/**
* Prepares document. Currently only stipping unlikely candidates, since
* from time to time they're getting more score than good ones especially in
* cases when major text is short.
*
* @param doc
* document to prepare. Passed as reference, and changed inside
* of function
*/
protected void prepareDocument(Document doc) {
// stripUnlikelyCandidates(doc);
removeScriptsAndStyles(doc);
}
/**
* Removes unlikely candidates from HTML. Currently takes id and class name
* and matches them against list of patterns
*
* @param doc
* document to strip unlikely candidates from
*/
protected void stripUnlikelyCandidates(Document doc) {
for (Element child : doc.select("body").select("*")) {
String className = child.className().toLowerCase(Locale.getDefault());
String id = child.id().toLowerCase(Locale.getDefault());
if (NEGATIVE.matcher(className).find() || NEGATIVE.matcher(id).find()) {
// print("REMOVE:", child);
child.remove();
}
}
}
private Document removeScriptsAndStyles(Document doc) {
Elements scripts = doc.getElementsByTag("script");
for (Element item : scripts) {
item.remove();
}
Elements noscripts = doc.getElementsByTag("noscript");
for (Element item : noscripts) {
item.remove();
}
Elements styles = doc.getElementsByTag("style");
for (Element style : styles) {
style.remove();
}
return doc;
}
private boolean isAdImage(String imageUrl) {
return SHelper.count(imageUrl, "ad") >= 2;
}
/**
* Match only exact matching as longestSubstring can be too fuzzy
*/
public String removeTitleFromText(String text, String title) {
// don't do this as its terrible to read
// int index1 = text.toLowerCase().indexOf(title.toLowerCase());
// if (index1 >= 0)
// text = text.substring(index1 + title.length());
// return text.trim();
return text;
}
/**
* @return a set of all important nodes
*/
public Collection<Element> getNodes(Document doc) {
Set<Element> nodes = new HashSet<Element>(64);
int score = 100;
for (Element el : doc.select("body").select("*")) {
if (NODES.matcher(el.tagName()).matches()) {
nodes.add(el);
setScore(el, score);
score = score / 2;
}
}
return nodes;
}
public String cleanTitle(String title) {
StringBuilder res = new StringBuilder();
// int index = title.lastIndexOf("|");
// if (index > 0 && title.length() / 2 < index)
// title = title.substring(0, index + 1);
int counter = 0;
String[] strs = title.split("\\|");
for (String part : strs) {
if (IGNORED_TITLE_PARTS.contains(part.toLowerCase(Locale.getDefault()).trim()))
continue;
if (counter == strs.length - 1 && res.length() > part.length())
continue;
if (counter > 0)
res.append("|");
res.append(part);
counter++;
}
return SHelper.innerTrim(res.toString());
}
/**
* Comparator for Image by weight
*
* @author Chris Alexander, chris@chris-alexander.co.uk
*
*/
public class ImageComparator implements Comparator<ImageResult> {
@Override
public int compare(ImageResult o1, ImageResult o2) {
// Returns the highest weight first
return o2.weight.compareTo(o1.weight);
}
}
}

243
src/acr/browser/lightning/Reading/Converter.java

@ -0,0 +1,243 @@
/*
* Copyright 2011 Peter Karich
*
* 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 acr.browser.lightning.Reading;
import java.io.*;
import java.net.SocketTimeoutException;
import java.nio.charset.Charset;
import java.util.Locale;
import acr.browser.lightning.Constants;
import android.util.Log;
/**
* This class is not thread safe. Use one new instance every time due to
* encoding variable.
*
* @author Peter Karich
*/
public class Converter {
public final static String UTF8 = "UTF-8";
public final static String ISO = "ISO-8859-1";
public final static int K2 = 2048;
private int maxBytes = 1000000 / 2;
private String encoding;
private String url;
public Converter(String urlOnlyHint) {
url = urlOnlyHint;
}
public Converter() {
}
public Converter setMaxBytes(int maxBytes) {
this.maxBytes = maxBytes;
return this;
}
public static String extractEncoding(String contentType) {
String[] values;
if (contentType != null)
values = contentType.split(";");
else
values = new String[0];
String charset = "";
for (String value : values) {
value = value.trim().toLowerCase(Locale.getDefault());
if (value.startsWith("charset="))
charset = value.substring("charset=".length());
}
// http1.1 says ISO-8859-1 is the default charset
if (charset.length() == 0)
charset = ISO;
return charset;
}
public String getEncoding() {
if (encoding == null)
return "";
return encoding.toLowerCase(Locale.getDefault());
}
public String streamToString(InputStream is) {
return streamToString(is, maxBytes, encoding);
}
public String streamToString(InputStream is, String enc) {
return streamToString(is, maxBytes, enc);
}
/**
* reads bytes off the string and returns a string
*
* @param is
* @param maxBytes
* The max bytes that we want to read from the input stream
* @return String
*/
public String streamToString(InputStream is, int maxBytes, String enc) {
encoding = enc;
// Http 1.1. standard is iso-8859-1 not utf8 :(
// but we force utf-8 as youtube assumes it ;)
if (encoding == null || encoding.isEmpty())
encoding = UTF8;
BufferedInputStream in = null;
try {
in = new BufferedInputStream(is, K2);
ByteArrayOutputStream output = new ByteArrayOutputStream();
// detect encoding with the help of meta tag
try {
in.mark(K2 * 2);
String tmpEnc = detectCharset("charset=", output, in, encoding);
if (tmpEnc != null)
encoding = tmpEnc;
else {
Log.d(Constants.TAG, "no charset found in first stage");
// detect with the help of xml beginning ala
// encoding="charset"
tmpEnc = detectCharset("encoding=", output, in, encoding);
if (tmpEnc != null)
encoding = tmpEnc;
else
Log.d(Constants.TAG, "no charset found in second stage");
}
if (!Charset.isSupported(encoding))
throw new UnsupportedEncodingException(encoding);
} catch (UnsupportedEncodingException e) {
Log.d(Constants.TAG,
"Using default encoding:" + UTF8 + " problem:" + e.getMessage()
+ " encoding:" + encoding + " " + url);
encoding = UTF8;
}
// SocketException: Connection reset
// IOException: missing CR => problem on server (probably some xml
// character thing?)
// IOException: Premature EOF => socket unexpectly closed from
// server
int bytesRead = output.size();
byte[] arr = new byte[K2];
while (true) {
if (bytesRead >= maxBytes) {
Log.d(Constants.TAG, "Maxbyte of " + maxBytes
+ " exceeded! Maybe html is now broken but try it nevertheless. Url: "
+ url);
break;
}
int n = in.read(arr);
if (n < 0)
break;
bytesRead += n;
output.write(arr, 0, n);
}
return output.toString(encoding);
} catch (SocketTimeoutException e) {
Log.e(Constants.TAG, e.toString() + " url:" + url);
} catch (IOException e) {
Log.e(Constants.TAG, e.toString() + " url:" + url);
} finally {
if (in != null) {
try {
in.close();
} catch (Exception e) {
}
}
}
return "";
}
/**
* This method detects the charset even if the first call only returns some
* bytes. It will read until 4K bytes are reached and then try to determine
* the encoding
*
* @throws IOException
*/
protected String detectCharset(String key, ByteArrayOutputStream bos, BufferedInputStream in,
String enc) throws IOException {
// Grab better encoding from stream
byte[] arr = new byte[K2];
int nSum = 0;
while (nSum < K2) {
int n = in.read(arr);
if (n < 0)
break;
nSum += n;
bos.write(arr, 0, n);
}
String str = bos.toString(enc);
int encIndex = str.indexOf(key);
int clength = key.length();
if (encIndex > 0) {
char startChar = str.charAt(encIndex + clength);
int lastEncIndex;
if (startChar == '\'')
// if we have charset='something'
lastEncIndex = str.indexOf("'", ++encIndex + clength);
else if (startChar == '\"')
// if we have charset="something"
lastEncIndex = str.indexOf("\"", ++encIndex + clength);
else {
// if we have "text/html; charset=utf-8"
int first = str.indexOf("\"", encIndex + clength);
if (first < 0)
first = Integer.MAX_VALUE;
// or "text/html; charset=utf-8 "
int sec = str.indexOf(" ", encIndex + clength);
if (sec < 0)
sec = Integer.MAX_VALUE;
lastEncIndex = Math.min(first, sec);
// or "text/html; charset=utf-8 '
int third = str.indexOf("'", encIndex + clength);
if (third > 0)
lastEncIndex = Math.min(lastEncIndex, third);
}
// re-read byte array with different encoding
// assume that the encoding string cannot be greater than 40 chars
if (lastEncIndex > encIndex + clength && lastEncIndex < encIndex + clength + 40) {
String tmpEnc = SHelper.encodingCleanup(str.substring(encIndex + clength,
lastEncIndex));
try {
in.reset();
bos.reset();
return tmpEnc;
} catch (IOException ex) {
Log.e(Constants.TAG, "Couldn't reset stream to re-read with new encoding "
+ tmpEnc + " " + ex.toString());
}
}
}
return null;
}
}

445
src/acr/browser/lightning/Reading/HtmlFetcher.java

@ -0,0 +1,445 @@
/*
* Copyright 2011 Peter Karich
*
* 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 acr.browser.lightning.Reading;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.Proxy;
import java.net.URL;
import java.util.LinkedHashSet;
import java.util.Locale;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.zip.GZIPInputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;
import acr.browser.lightning.Constants;
import android.util.Log;
/**
* Class to fetch articles. This class is thread safe.
*
* @author Peter Karich
*/
public class HtmlFetcher {
static {
SHelper.enableCookieMgmt();
SHelper.enableUserAgentOverwrite();
SHelper.enableAnySSL();
}
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new FileReader("urls.txt"));
String line = null;
Set<String> existing = new LinkedHashSet<String>();
while ((line = reader.readLine()) != null) {
int index1 = line.indexOf("\"");
int index2 = line.indexOf("\"", index1 + 1);
String url = line.substring(index1 + 1, index2);
String domainStr = SHelper.extractDomain(url, true);
String counterStr = "";
// TODO more similarities
if (existing.contains(domainStr))
counterStr = "2";
else
existing.add(domainStr);
String html = new HtmlFetcher().fetchAsString(url, 20000);
String outFile = domainStr + counterStr + ".html";
BufferedWriter writer = new BufferedWriter(new FileWriter(outFile));
writer.write(html);
writer.close();
}
reader.close();
}
private String referrer = "https://github.com/karussell/snacktory";
private String userAgent = "Mozilla/5.0 (compatible; Snacktory; +" + referrer + ")";
private String cacheControl = "max-age=0";
private String language = "en-us";
private String accept = "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
private String charset = "UTF-8";
private SCache cache;
private AtomicInteger cacheCounter = new AtomicInteger(0);
private int maxTextLength = -1;
private ArticleTextExtractor extractor = new ArticleTextExtractor();
private Set<String> furtherResolveNecessary = new LinkedHashSet<String>() {
{
add("bit.ly");
add("cli.gs");
add("deck.ly");
add("fb.me");
add("feedproxy.google.com");
add("flic.kr");
add("fur.ly");
add("goo.gl");
add("is.gd");
add("ink.co");
add("j.mp");
add("lnkd.in");
add("on.fb.me");
add("ow.ly");
add("plurl.us");
add("sns.mx");
add("snurl.com");
add("su.pr");
add("t.co");
add("tcrn.ch");
add("tl.gd");
add("tiny.cc");
add("tinyurl.com");
add("tmi.me");
add("tr.im");
add("twurl.nl");
}
};
public HtmlFetcher() {
}
public void setExtractor(ArticleTextExtractor extractor) {
this.extractor = extractor;
}
public ArticleTextExtractor getExtractor() {
return extractor;
}
public HtmlFetcher setCache(SCache cache) {
this.cache = cache;
return this;
}
public SCache getCache() {
return cache;
}
public int getCacheCounter() {
return cacheCounter.get();
}
public HtmlFetcher clearCacheCounter() {
cacheCounter.set(0);
return this;
}
public HtmlFetcher setMaxTextLength(int maxTextLength) {
this.maxTextLength = maxTextLength;
return this;
}
public int getMaxTextLength() {
return maxTextLength;
}
public void setAccept(String accept) {
this.accept = accept;
}
public void setCharset(String charset) {
this.charset = charset;
}
public void setCacheControl(String cacheControl) {
this.cacheControl = cacheControl;
}
public String getLanguage() {
return language;
}
public void setLanguage(String language) {
this.language = language;
}
public String getReferrer() {
return referrer;
}
public HtmlFetcher setReferrer(String referrer) {
this.referrer = referrer;
return this;
}
public String getUserAgent() {
return userAgent;
}
public void setUserAgent(String userAgent) {
this.userAgent = userAgent;
}
public String getAccept() {
return accept;
}
public String getCacheControl() {
return cacheControl;
}
public String getCharset() {
return charset;
}
public JResult fetchAndExtract(String url, int timeout, boolean resolve) throws Exception {
String originalUrl = url;
url = SHelper.removeHashbang(url);
String gUrl = SHelper.getUrlFromUglyGoogleRedirect(url);
if (gUrl != null)
url = gUrl;
else {
gUrl = SHelper.getUrlFromUglyFacebookRedirect(url);
if (gUrl != null)
url = gUrl;
}
if (resolve) {
// check if we can avoid resolving the URL (which hits the website!)
JResult res = getFromCache(url, originalUrl);
if (res != null)
return res;
String resUrl = getResolvedUrl(url, timeout);
if (resUrl.isEmpty()) {
Log.d(Constants.TAG, "resolved url is empty. Url is: " + url);
JResult result = new JResult();
if (cache != null)
cache.put(url, result);
return result.setUrl(url);
}
// if resolved url is longer then use it!
if (resUrl != null && resUrl.trim().length() > url.length()) {
// this is necessary e.g. for some homebaken url resolvers which
// return
// the resolved url relative to url!
url = SHelper.useDomainOfFirstArg4Second(url, resUrl);
}
}
// check if we have the (resolved) URL in cache
JResult res = getFromCache(url, originalUrl);
if (res != null)
return res;
JResult result = new JResult();
// or should we use? <link rel="canonical"
// href="http://www.N24.de/news/newsitem_6797232.html"/>
result.setUrl(url);
result.setOriginalUrl(originalUrl);
result.setDate(SHelper.estimateDate(url));
// Immediately put the url into the cache as extracting content takes
// time.
if (cache != null) {
cache.put(originalUrl, result);
cache.put(url, result);
}
String lowerUrl = url.toLowerCase(Locale.getDefault());
if (SHelper.isDoc(lowerUrl) || SHelper.isApp(lowerUrl) || SHelper.isPackage(lowerUrl)) {
// skip
} else if (SHelper.isVideo(lowerUrl) || SHelper.isAudio(lowerUrl)) {
result.setVideoUrl(url);
} else if (SHelper.isImage(lowerUrl)) {
result.setImageUrl(url);
} else {
extractor.extractContent(result, fetchAsString(url, timeout));
if (result.getFaviconUrl().isEmpty())
result.setFaviconUrl(SHelper.getDefaultFavicon(url));
// some links are relative to root and do not include the domain of
// the url :(
result.setFaviconUrl(fixUrl(url, result.getFaviconUrl()));
result.setImageUrl(fixUrl(url, result.getImageUrl()));
result.setVideoUrl(fixUrl(url, result.getVideoUrl()));
result.setRssUrl(fixUrl(url, result.getRssUrl()));
}
result.setText(lessText(result.getText()));
synchronized (result) {
result.notifyAll();
}
return result;
}
public String lessText(String text) {
if (text == null)
return "";
if (maxTextLength >= 0 && text.length() > maxTextLength)
return text.substring(0, maxTextLength);
return text;
}
private static String fixUrl(String url, String urlOrPath) {
return SHelper.useDomainOfFirstArg4Second(url, urlOrPath);
}
public String fetchAsString(String urlAsString, int timeout) throws MalformedURLException,
IOException {
return fetchAsString(urlAsString, timeout, true);
}
public String fetchAsString(String urlAsString, int timeout, boolean includeSomeGooseOptions)
throws MalformedURLException, IOException {
HttpURLConnection hConn = createUrlConnection(urlAsString, timeout, includeSomeGooseOptions);
hConn.setInstanceFollowRedirects(true);
String encoding = hConn.getContentEncoding();
InputStream is;
if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
is = new GZIPInputStream(hConn.getInputStream());
} else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
is = new InflaterInputStream(hConn.getInputStream(), new Inflater(true));
} else {
is = hConn.getInputStream();
}
String enc = Converter.extractEncoding(hConn.getContentType());
String res = createConverter(urlAsString).streamToString(is, enc);
Log.d(Constants.TAG, res.length() + " FetchAsString:" + urlAsString);
return res;
}
public Converter createConverter(String url) {
return new Converter(url);
}
/**
* On some devices we have to hack:
* http://developers.sun.com/mobility/reference
* /techart/design_guidelines/http_redirection.html
*
* @param timeout
* Sets a specified timeout value, in milliseconds
* @return the resolved url if any. Or null if it couldn't resolve the url
* (within the specified time) or the same url if response code is
* OK
*/
public String getResolvedUrl(String urlAsString, int timeout) {
String newUrl = null;
int responseCode = -1;
try {
HttpURLConnection hConn = createUrlConnection(urlAsString, timeout, true);
// force no follow
hConn.setInstanceFollowRedirects(false);
// the program doesn't care what the content actually is !!
// http://java.sun.com/developer/JDCTechTips/2003/tt0422.html
hConn.setRequestMethod("HEAD");
hConn.connect();
responseCode = hConn.getResponseCode();
hConn.getInputStream().close();
if (responseCode == HttpURLConnection.HTTP_OK)
return urlAsString;
newUrl = hConn.getHeaderField("Location");
if (responseCode / 100 == 3 && newUrl != null) {
newUrl = newUrl.replaceAll(" ", "+");
// some services use (none-standard) utf8 in their location
// header
if (urlAsString.startsWith("http://bit.ly")
|| urlAsString.startsWith("http://is.gd"))
newUrl = encodeUriFromHeader(newUrl);
// fix problems if shortened twice. as it is often the case
// after twitters' t.co bullshit
if (furtherResolveNecessary.contains(SHelper.extractDomain(newUrl, true)))
newUrl = getResolvedUrl(newUrl, timeout);
return newUrl;
} else
return urlAsString;
} catch (Exception ex) {
Log.e(Constants.TAG, "getResolvedUrl:" + urlAsString + " Error:" + ex.getMessage());
return "";
} finally {
Log.e(Constants.TAG, responseCode + " url:" + urlAsString + " resolved:" + newUrl);
}
}
/**
* Takes a URI that was decoded as ISO-8859-1 and applies percent-encoding
* to non-ASCII characters. Workaround for broken origin servers that send
* UTF-8 in the Location: header.
*/
static String encodeUriFromHeader(String badLocation) {
StringBuilder sb = new StringBuilder();
for (char ch : badLocation.toCharArray()) {
if (ch < (char) 128) {
sb.append(ch);
} else {
// this is ONLY valid if the uri was decoded using ISO-8859-1
sb.append(String.format("%%%02X", (int) ch));
}
}
return sb.toString();
}
protected HttpURLConnection createUrlConnection(String urlAsStr, int timeout,
boolean includeSomeGooseOptions) throws MalformedURLException, IOException {
URL url = new URL(urlAsStr);
// using proxy may increase latency
HttpURLConnection hConn = (HttpURLConnection) url.openConnection(Proxy.NO_PROXY);
hConn.setRequestProperty("User-Agent", userAgent);
hConn.setRequestProperty("Accept", accept);
if (includeSomeGooseOptions) {
hConn.setRequestProperty("Accept-Language", language);
hConn.setRequestProperty("content-charset", charset);
hConn.addRequestProperty("Referer", referrer);
// avoid the cache for testing purposes only?
hConn.setRequestProperty("Cache-Control", cacheControl);
}
// suggest respond to be gzipped or deflated (which is just another
// compression)
// http://stackoverflow.com/q/3932117
hConn.setRequestProperty("Accept-Encoding", "gzip, deflate");
hConn.setConnectTimeout(timeout);
hConn.setReadTimeout(timeout);
return hConn;
}
private JResult getFromCache(String url, String originalUrl) throws Exception {
if (cache != null) {
JResult res = cache.get(url);
if (res != null) {
// e.g. the cache returned a shortened url as original url now
// we want to store the
// current original url! Also it can be that the cache response
// to url but the JResult
// does not contain it so overwrite it:
res.setUrl(url);
res.setOriginalUrl(originalUrl);
cacheCounter.addAndGet(1);
return res;
}
}
return null;
}
}

31
src/acr/browser/lightning/Reading/ImageResult.java

@ -0,0 +1,31 @@
package acr.browser.lightning.Reading;
import org.jsoup.nodes.Element;
/**
* Class which encapsulates the data from an image found under an element
*
* @author Chris Alexander, chris@chris-alexander.co.uk
*/
public class ImageResult {
public String src;
public Integer weight;
public String title;
public int height;
public int width;
public String alt;
public boolean noFollow;
public Element element;
public ImageResult(String src, Integer weight, String title, int height, int width, String alt,
boolean noFollow) {
this.src = src;
this.weight = weight;
this.title = title;
this.height = height;
this.width = width;
this.alt = alt;
this.noFollow = noFollow;
}
}

216
src/acr/browser/lightning/Reading/JResult.java

@ -0,0 +1,216 @@
/*
* Copyright 2011 Peter Karich
*
* 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 acr.browser.lightning.Reading;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* Parsed result from web page containing important title, text and image.
*
* @author Peter Karich
*/
public class JResult implements Serializable {
private String title;
private String url;
private String originalUrl;
private String canonicalUrl;
private String imageUrl;
private String videoUrl;
private String rssUrl;
private String text;
private String faviconUrl;
private String description;
private String dateString;
private List<String> textList;
private Collection<String> keywords;
private List<ImageResult> images = null;
public JResult() {
}
public String getUrl() {
if (url == null)
return "";
return url;
}
public JResult setUrl(String url) {
this.url = url;
return this;
}
public JResult setOriginalUrl(String originalUrl) {
this.originalUrl = originalUrl;
return this;
}
public String getOriginalUrl() {
return originalUrl;
}
public JResult setCanonicalUrl(String canonicalUrl) {
this.canonicalUrl = canonicalUrl;
return this;
}
public String getCanonicalUrl() {
return canonicalUrl;
}
public String getFaviconUrl() {
if (faviconUrl == null)
return "";
return faviconUrl;
}
public JResult setFaviconUrl(String faviconUrl) {
this.faviconUrl = faviconUrl;
return this;
}
public JResult setRssUrl(String rssUrl) {
this.rssUrl = rssUrl;
return this;
}
public String getRssUrl() {
if (rssUrl == null)
return "";
return rssUrl;
}
public String getDescription() {
if (description == null)
return "";
return description;
}
public JResult setDescription(String description) {
this.description = description;
return this;
}
public String getImageUrl() {
if (imageUrl == null)
return "";
return imageUrl;
}
public JResult setImageUrl(String imageUrl) {
this.imageUrl = imageUrl;
return this;
}
public String getText() {
if (text == null)
return "";
return text;
}
public JResult setText(String text) {
this.text = text;
return this;
}
public List<String> getTextList() {
if (this.textList == null)
return new ArrayList<String>();
return this.textList;
}
public JResult setTextList(List<String> textList) {
this.textList = textList;
return this;
}
public String getTitle() {
if (title == null)
return "";
return title;
}
public JResult setTitle(String title) {
this.title = title;
return this;
}
public String getVideoUrl() {
if (videoUrl == null)
return "";
return videoUrl;
}
public JResult setVideoUrl(String videoUrl) {
this.videoUrl = videoUrl;
return this;
}
public JResult setDate(String date) {
this.dateString = date;
return this;
}
public Collection<String> getKeywords() {
return keywords;
}
public void setKeywords(Collection<String> keywords) {
this.keywords = keywords;
}
/**
* @return get date from url or guessed from text
*/
public String getDate() {
return dateString;
}
/**
* @return images list
*/
public List<ImageResult> getImages() {
if (images == null)
return Collections.emptyList();
return images;
}
/**
* @return images count
*/
public int getImagesCount() {
if (images == null)
return 0;
return images.size();
}
/**
* set images list
*/
public void setImages(List<ImageResult> images) {
this.images = images;
}
@Override
public String toString() {
return "title:" + getTitle() + " imageUrl:" + getImageUrl() + " text:" + text;
}
}

80
src/acr/browser/lightning/Reading/MapEntry.java

@ -0,0 +1,80 @@
/**
* Copyright (C) 2010 Peter Karich <>
*
* 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 acr.browser.lightning.Reading;
import java.io.Serializable;
import java.util.Map;
/**
* Simple impl of Map.Entry. So that we can have ordered maps.
*
* @author Peter Karich, peat_hal at users dot sourceforge dot
* net
*/
public class MapEntry<K, V> implements Map.Entry<K, V>, Serializable {
private static final long serialVersionUID = 1L;
private K key;
private V value;
public MapEntry(K key, V value) {
this.key = key;
this.value = value;
}
@Override
public K getKey() {
return key;
}
@Override
public V getValue() {
return value;
}
@Override
public V setValue(V value) {
this.value = value;
return value;
}
@Override
public String toString() {
return getKey() + ", " + getValue();
}
@Override
public boolean equals(Object obj) {
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
final MapEntry<K, V> other = (MapEntry<K, V>) obj;
if (this.key != other.key && (this.key == null || !this.key.equals(other.key)))
return false;
if (this.value != other.value && (this.value == null || !this.value.equals(other.value)))
return false;
return true;
}
@Override
public int hashCode() {
int hash = 7;
hash = 19 * hash + (this.key != null ? this.key.hashCode() : 0);
hash = 19 * hash + (this.value != null ? this.value.hashCode() : 0);
return hash;
}
}

174
src/acr/browser/lightning/Reading/OutputFormatter.java

@ -0,0 +1,174 @@
package acr.browser.lightning.Reading;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import java.util.regex.Pattern;
import org.jsoup.nodes.Node;
import org.jsoup.nodes.TextNode;
/**
* @author goose | jim
* @author karussell
*
* this class will be responsible for taking our top node and stripping
* out junk we don't want and getting it ready for how we want it
* presented to the user
*/
public class OutputFormatter {
public static final int MIN_PARAGRAPH_TEXT = 50;
private static final List<String> NODES_TO_REPLACE = Arrays.asList("strong", "b", "i");
private Pattern unlikelyPattern = Pattern.compile("display\\:none|visibility\\:hidden");
protected final int minParagraphText;
protected final List<String> nodesToReplace;
protected String nodesToKeepCssSelector = "p";
public OutputFormatter() {
this(MIN_PARAGRAPH_TEXT, NODES_TO_REPLACE);
}
public OutputFormatter(int minParagraphText) {
this(minParagraphText, NODES_TO_REPLACE);
}
public OutputFormatter(int minParagraphText, List<String> nodesToReplace) {
this.minParagraphText = minParagraphText;
this.nodesToReplace = nodesToReplace;
}
/**
* set elements to keep in output text
*/
public void setNodesToKeepCssSelector(String nodesToKeepCssSelector) {
this.nodesToKeepCssSelector = nodesToKeepCssSelector;
}
/**
* takes an element and turns the P tags into \n\n
*/
public String getFormattedText(Element topNode) {
removeNodesWithNegativeScores(topNode);
StringBuilder sb = new StringBuilder();
append(topNode, sb, nodesToKeepCssSelector);
String str = SHelper.innerTrim(sb.toString());
if (str.length() > 100)
return str;
// no subelements
if (str.isEmpty() || !topNode.text().isEmpty()
&& str.length() <= topNode.ownText().length())
str = topNode.text();
// if jsoup failed to parse the whole html now parse this smaller
// snippet again to avoid html tags disturbing our text:
return Jsoup.parse(str).text();
}
/**
* Takes an element and returns a list of texts extracted from the P tags
*/
public List<String> getTextList(Element topNode) {
List<String> texts = new ArrayList<String>();
for (Element element : topNode.select(this.nodesToKeepCssSelector)) {
if (element.hasText()) {
texts.add(element.text());
}
}
return texts;
}
/**
* If there are elements inside our top node that have a negative gravity
* score remove them
*/
protected void removeNodesWithNegativeScores(Element topNode) {
Elements gravityItems = topNode.select("*[gravityScore]");
for (Element item : gravityItems) {
int score = Integer.parseInt(item.attr("gravityScore"));
if (score < 0 || item.text().length() < minParagraphText)
item.remove();
}
}
protected void append(Element node, StringBuilder sb, String tagName) {
// is select more costly then getElementsByTag?
MAIN: for (Element e : node.select(tagName)) {
Element tmpEl = e;
// check all elements until 'node'
while (tmpEl != null && !tmpEl.equals(node)) {
if (unlikely(tmpEl))
continue MAIN;
tmpEl = tmpEl.parent();
}
String text = node2Text(e);
if (text.isEmpty() || text.length() < minParagraphText
|| text.length() > SHelper.countLetters(text) * 2)
continue;
sb.append(text);
sb.append("\n\n");
}
}
boolean unlikely(Node e) {
if (e.attr("class") != null && e.attr("class").toLowerCase(Locale.getDefault()).contains("caption"))
return true;
String style = e.attr("style");
String clazz = e.attr("class");
if (unlikelyPattern.matcher(style).find() || unlikelyPattern.matcher(clazz).find())
return true;
return false;
}
void appendTextSkipHidden(Element e, StringBuilder accum) {
for (Node child : e.childNodes()) {
if (unlikely(child))
continue;
if (child instanceof TextNode) {
TextNode textNode = (TextNode) child;
String txt = textNode.text();
accum.append(txt);
} else if (child instanceof Element) {
Element element = (Element) child;
if (accum.length() > 0 && element.isBlock() && !lastCharIsWhitespace(accum))
accum.append(" ");
else if (element.tagName().equals("br"))
accum.append(" ");
appendTextSkipHidden(element, accum);
}
}
}
boolean lastCharIsWhitespace(StringBuilder accum) {
if (accum.length() == 0)
return false;
return Character.isWhitespace(accum.charAt(accum.length() - 1));
}
protected String node2TextOld(Element el) {
return el.text();
}
protected String node2Text(Element el) {
StringBuilder sb = new StringBuilder(200);
appendTextSkipHidden(el, sb);
return sb.toString();
}
public OutputFormatter setUnlikelyPattern(String unlikelyPattern) {
this.unlikelyPattern = Pattern.compile(unlikelyPattern);
return this;
}
public OutputFormatter appendUnlikelyPattern(String str) {
return setUnlikelyPattern(unlikelyPattern.toString() + "|" + str);
}
}

29
src/acr/browser/lightning/Reading/SCache.java

@ -0,0 +1,29 @@
/*
* Copyright 2011 Peter Karich
*
* 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 acr.browser.lightning.Reading;
/**
*
* @author Peter Karich
*/
public interface SCache {
JResult get(String url);
void put(String url, JResult res);
int getSize();
}

480
src/acr/browser/lightning/Reading/SHelper.java

@ -0,0 +1,480 @@
/*
* Copyright 2011 Peter Karich
*
* 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 acr.browser.lightning.Reading;
import java.io.UnsupportedEncodingException;
import java.net.CookieHandler;
import java.net.CookieManager;
import java.net.CookiePolicy;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.SimpleDateFormat;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.net.ssl.KeyManager;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.jsoup.nodes.Element;
/**
*
* @author Peter Karich
*/
public class SHelper {
public static final String UTF8 = "UTF-8";
private static final Pattern SPACE = Pattern.compile(" ");
public static String replaceSpaces(String url) {
if (!url.isEmpty()) {
url = url.trim();
if (url.contains(" ")) {
Matcher spaces = SPACE.matcher(url);
url = spaces.replaceAll("%20");
}
}
return url;
}
public static int count(String str, String substring) {
int c = 0;
int index1 = str.indexOf(substring);
if (index1 >= 0) {
c++;
c += count(str.substring(index1 + substring.length()), substring);
}
return c;
}
/**
* remove more than two spaces or newlines
*/
public static String innerTrim(String str) {
if (str.isEmpty())
return "";
StringBuilder sb = new StringBuilder();
boolean previousSpace = false;
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (c == ' ' || (int) c == 9 || c == '\n') {
previousSpace = true;
continue;
}
if (previousSpace)
sb.append(' ');
previousSpace = false;
sb.append(c);
}
return sb.toString().trim();
}
/**
* Starts reading the encoding from the first valid character until an
* invalid encoding character occurs.
*/
public static String encodingCleanup(String str) {
StringBuilder sb = new StringBuilder();
boolean startedWithCorrectString = false;
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (Character.isDigit(c) || Character.isLetter(c) || c == '-' || c == '_') {
startedWithCorrectString = true;
sb.append(c);
continue;
}
if (startedWithCorrectString)
break;
}
return sb.toString().trim();
}
/**
* @return the longest substring as str1.substring(result[0], result[1]);
*/
public static String getLongestSubstring(String str1, String str2) {
int res[] = longestSubstring(str1, str2);
if (res == null || res[0] >= res[1])
return "";
return str1.substring(res[0], res[1]);
}
public static int[] longestSubstring(String str1, String str2) {
if (str1 == null || str1.isEmpty() || str2 == null || str2.isEmpty())
return null;
// dynamic programming => save already identical length into array
// to understand this algo simply print identical length in every entry
// of the array
// i+1, j+1 then reuses information from i,j
// java initializes them already with 0
int[][] num = new int[str1.length()][str2.length()];
int maxlen = 0;
int lastSubstrBegin = 0;
int endIndex = 0;
for (int i = 0; i < str1.length(); i++) {
for (int j = 0; j < str2.length(); j++) {
if (str1.charAt(i) == str2.charAt(j)) {
if ((i == 0) || (j == 0))
num[i][j] = 1;
else
num[i][j] = 1 + num[i - 1][j - 1];
if (num[i][j] > maxlen) {
maxlen = num[i][j];
// generate substring from str1 => i
lastSubstrBegin = i - num[i][j] + 1;
endIndex = i + 1;
}
}
}
}
return new int[] { lastSubstrBegin, endIndex };
}
public static String getDefaultFavicon(String url) {
return useDomainOfFirstArg4Second(url, "/favicon.ico");
}
/**
* @param urlForDomain
* extract the domain from this url
* @param path
* this url does not have a domain
* @return
*/
public static String useDomainOfFirstArg4Second(String urlForDomain, String path) {
if (path.startsWith("http"))
return path;
if ("favicon.ico".equals(path))
path = "/favicon.ico";
if (path.startsWith("//")) {
// wikipedia special case, see tests
if (urlForDomain.startsWith("https:"))
return "https:" + path;
return "http:" + path;
} else if (path.startsWith("/"))
return "http://" + extractHost(urlForDomain) + path;
else if (path.startsWith("../")) {
int slashIndex = urlForDomain.lastIndexOf("/");
if (slashIndex > 0 && slashIndex + 1 < urlForDomain.length())
urlForDomain = urlForDomain.substring(0, slashIndex + 1);
return urlForDomain + path;
}
return path;
}
public static String extractHost(String url) {
return extractDomain(url, false);
}
public static String extractDomain(String url, boolean aggressive) {
if (url.startsWith("http://"))
url = url.substring("http://".length());
else if (url.startsWith("https://"))
url = url.substring("https://".length());
if (aggressive) {
if (url.startsWith("www."))
url = url.substring("www.".length());
// strip mobile from start
if (url.startsWith("m."))
url = url.substring("m.".length());
}
int slashIndex = url.indexOf("/");
if (slashIndex > 0)
url = url.substring(0, slashIndex);
return url;
}
public static boolean isVideoLink(String url) {
url = extractDomain(url, true);
return url.startsWith("youtube.com") || url.startsWith("video.yahoo.com")
|| url.startsWith("vimeo.com") || url.startsWith("blip.tv");
}
public static boolean isVideo(String url) {
return url.endsWith(".mpeg") || url.endsWith(".mpg") || url.endsWith(".avi")
|| url.endsWith(".mov") || url.endsWith(".mpg4") || url.endsWith(".mp4")
|| url.endsWith(".flv") || url.endsWith(".wmv");
}
public static boolean isAudio(String url) {
return url.endsWith(".mp3") || url.endsWith(".ogg") || url.endsWith(".m3u")
|| url.endsWith(".wav");
}
public static boolean isDoc(String url) {
return url.endsWith(".pdf") || url.endsWith(".ppt") || url.endsWith(".doc")
|| url.endsWith(".swf") || url.endsWith(".rtf") || url.endsWith(".xls");
}
public static boolean isPackage(String url) {
return url.endsWith(".gz") || url.endsWith(".tgz") || url.endsWith(".zip")
|| url.endsWith(".rar") || url.endsWith(".deb") || url.endsWith(".rpm")
|| url.endsWith(".7z");
}
public static boolean isApp(String url) {
return url.endsWith(".exe") || url.endsWith(".bin") || url.endsWith(".bat")
|| url.endsWith(".dmg");
}
public static boolean isImage(String url) {
return url.endsWith(".png") || url.endsWith(".jpeg") || url.endsWith(".gif")
|| url.endsWith(".jpg") || url.endsWith(".bmp") || url.endsWith(".ico")
|| url.endsWith(".eps");
}
/**
* @see http
* ://blogs.sun.com/CoreJavaTechTips/entry/cookie_handling_in_java_se
*/
public static void enableCookieMgmt() {
CookieManager manager = new CookieManager();
manager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
CookieHandler.setDefault(manager);
}
/**
* @see http
* ://stackoverflow.com/questions/2529682/setting-user-agent-of-a-java
* -urlconnection
*/
public static void enableUserAgentOverwrite() {
System.setProperty("http.agent", "");
}
public static String getUrlFromUglyGoogleRedirect(String url) {
if (url.startsWith("http://www.google.com/url?")) {
url = url.substring("http://www.google.com/url?".length());
String arr[] = urlDecode(url).split("\\&");
if (arr != null)
for (String str : arr) {
if (str.startsWith("q="))
return str.substring("q=".length());
}
}
return null;
}
public static String getUrlFromUglyFacebookRedirect(String url) {
if (url.startsWith("http://www.facebook.com/l.php?u=")) {
url = url.substring("http://www.facebook.com/l.php?u=".length());
return urlDecode(url);
}
return null;
}
public static String urlEncode(String str) {
try {
return URLEncoder.encode(str, UTF8);
} catch (UnsupportedEncodingException ex) {
return str;
}
}
public static String urlDecode(String str) {
try {
return URLDecoder.decode(str, UTF8);
} catch (UnsupportedEncodingException ex) {
return str;
}
}
/**
* Popular sites uses the #! to indicate the importance of the following
* chars. Ugly but true. Such as: facebook, twitter, gizmodo, ...
*/
public static String removeHashbang(String url) {
return url.replaceFirst("#!", "");
}
public static String printNode(Element root) {
return printNode(root, 0);
}
public static String printNode(Element root, int indentation) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < indentation; i++) {
sb.append(' ');
}
sb.append(root.tagName());
sb.append(":");
sb.append(root.ownText());
sb.append("\n");
for (Element el : root.children()) {
sb.append(printNode(el, indentation + 1));
sb.append("\n");
}
return sb.toString();
}
public static String estimateDate(String url) {
int index = url.indexOf("://");
if (index > 0)
url = url.substring(index + 3);
int year = -1;
int yearCounter = -1;
int month = -1;
int monthCounter = -1;
int day = -1;
String strs[] = url.split("/");
for (int counter = 0; counter < strs.length; counter++) {
String str = strs[counter];
if (str.length() == 4) {
try {
year = Integer.parseInt(str);
} catch (Exception ex) {
continue;
}
if (year < 1970 || year > 3000) {
year = -1;
continue;
}
yearCounter = counter;
} else if (str.length() == 2) {
if (monthCounter < 0 && counter == yearCounter + 1) {
try {
month = Integer.parseInt(str);
} catch (Exception ex) {
continue;
}
if (month < 1 || month > 12) {
month = -1;
continue;
}
monthCounter = counter;
} else if (counter == monthCounter + 1) {
try {
day = Integer.parseInt(str);
} catch (Exception ex) {
}
if (day < 1 || day > 31) {
day = -1;
continue;
}
break;
}
}
}
if (year < 0)
return null;
StringBuilder str = new StringBuilder();
str.append(year);
if (month < 1)
return str.toString();
str.append('/');
if (month < 10)
str.append('0');
str.append(month);
if (day < 1)
return str.toString();
str.append('/');
if (day < 10)
str.append('0');
str.append(day);
return str.toString();
}
public static String completeDate(String dateStr) {
if (dateStr == null)
return null;
int index = dateStr.indexOf('/');
if (index > 0) {
index = dateStr.indexOf('/', index + 1);
if (index > 0)
return dateStr;
else
return dateStr + "/01";
}
return dateStr + "/01/01";
}
/**
* keep in mind: simpleDateFormatter is not thread safe! call completeDate
* before applying this formatter.
*/
public static SimpleDateFormat createDateFormatter() {
return new SimpleDateFormat("yyyy/MM/dd", Locale.getDefault());
}
// with the help of
// http://stackoverflow.com/questions/1828775/httpclient-and-ssl
public static void enableAnySSL() {
try {
SSLContext ctx = SSLContext.getInstance("TLS");
ctx.init(new KeyManager[0], new TrustManager[] { new DefaultTrustManager() },
new SecureRandom());
SSLContext.setDefault(ctx);
} catch (Exception ex) {
ex.printStackTrace();
}
}
private static class DefaultTrustManager implements X509TrustManager {
@Override
public void checkClientTrusted(X509Certificate[] arg0, String arg1)
throws CertificateException {
}
@Override
public void checkServerTrusted(X509Certificate[] arg0, String arg1)
throws CertificateException {
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
}
}
public static int countLetters(String str) {
int len = str.length();
int chars = 0;
for (int i = 0; i < len; i++) {
if (Character.isLetter(str.charAt(i)))
chars++;
}
return chars;
}
}

153
src/acr/browser/lightning/ReadingActivity.java

@ -0,0 +1,153 @@
package acr.browser.lightning;
import java.util.ArrayList;
import java.util.List;
import acr.browser.lightning.Reading.HtmlFetcher;
import acr.browser.lightning.Reading.JResult;
import android.animation.ObjectAnimator;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
public class ReadingActivity extends ActionBarActivity {
private TextView mTitle;
private TextView mBody;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.reading_view);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
mTitle = (TextView) findViewById(R.id.textViewTitle);
mBody = (TextView) findViewById(R.id.textViewBody);
mTitle.setText(getString(R.string.untitled));
mBody.setText(getString(R.string.loading));
mTitle.setVisibility(View.INVISIBLE);
mBody.setVisibility(View.INVISIBLE);
Intent intent = getIntent();
if (!loadPage(intent)) {
setText(getString(R.string.untitled), getString(R.string.loading_failed));
}
}
protected boolean loadPage(Intent intent) {
if (intent == null) {
return false;
}
String url = intent.getStringExtra(Constants.LOAD_READING_URL);
if (url == null) {
return false;
}
getSupportActionBar().setTitle(Utils.getDomainName(url));
new PageLoader(this).execute(url);
return true;
}
private class PageLoader extends AsyncTask<String, Void, Void> {
private Context mContext;
private ProgressDialog mProgressDialog;
private String mTitleText;
private List<String> mBodyText;
public PageLoader(Context context) {
mContext = context;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog = new ProgressDialog(mContext);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
mProgressDialog.setCancelable(false);
mProgressDialog.setIndeterminate(true);
mProgressDialog.setMessage(mContext.getString(R.string.loading));
mProgressDialog.show();
}
@Override
protected Void doInBackground(String... params) {
HtmlFetcher fetcher = new HtmlFetcher();
try {
JResult result = fetcher.fetchAndExtract(params[0], 5000, true);
mTitleText = result.getTitle();
mBodyText = result.getTextList();
} catch (Exception e) {
mTitleText = "";
mBodyText = new ArrayList<>();
e.printStackTrace();
} catch (OutOfMemoryError e) {
System.gc();
mTitleText = "";
mBodyText = new ArrayList<>();
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
mProgressDialog.dismiss();
if (mTitleText.isEmpty() || mBodyText.isEmpty()) {
setText(getString(R.string.untitled), getString(R.string.loading_failed));
} else {
StringBuilder builder = new StringBuilder();
for (String text : mBodyText) {
builder.append(text + "\n\n");
}
setText(mTitleText, builder.toString());
}
super.onPostExecute(result);
}
}
private void setText(String title, String body) {
if (mTitle.getVisibility() == View.INVISIBLE) {
mTitle.setAlpha(0.0f);
mTitle.setVisibility(View.VISIBLE);
mTitle.setText(title);
ObjectAnimator animator = ObjectAnimator.ofFloat(mTitle, "alpha", 1.0f);
animator.setDuration(300);
animator.start();
} else {
mTitle.setText(title);
}
if (mBody.getVisibility() == View.INVISIBLE) {
mBody.setAlpha(0.0f);
mBody.setVisibility(View.VISIBLE);
mBody.setText(body);
ObjectAnimator animator = ObjectAnimator.ofFloat(mBody, "alpha", 1.0f);
animator.setDuration(300);
animator.start();
} else {
mBody.setText(body);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
finish();
return super.onOptionsItemSelected(item);
}
}
Loading…
Cancel
Save