Documents some utilities

app/src/main/java/com/keylesspalace/tusky/util/CountUpDownLatch.java

@@ -15,6 +15,13 @@
 
 package com.keylesspalace.tusky.util;
 
+/**
+ * This is a synchronization primitive related to {@link java.util.concurrent.CountDownLatch}
+ * except that it starts at zero and can count upward.
+ * <p>
+ * The intended use case is for waiting for all tasks to be finished when the number of tasks isn't
+ * known ahead of time, or may change while waiting.
+ */
 public class CountUpDownLatch {
     private int count;
 

app/src/main/java/com/keylesspalace/tusky/util/DateUtils.java

@@ -20,8 +20,10 @@ import android.content.Context;
 import com.keylesspalace.tusky.R;
 
 public class DateUtils {
-    /* This is a rough duplicate of android.text.format.DateUtils.getRelativeTimeSpanString,
+    /**
-     * but even with the FORMAT_ABBREV_RELATIVE flag it wasn't abbreviating enough. */
+     * This is a rough duplicate of {@link android.text.format.DateUtils#getRelativeTimeSpanString},
+     * but even with the FORMAT_ABBREV_RELATIVE flag it wasn't abbreviating enough.
+     */
     public static String getRelativeTimeSpanString(Context context, long then, long now) {
         final long MINUTE = 60;
         final long HOUR = 60 * MINUTE;

app/src/main/java/com/keylesspalace/tusky/util/DownsizeImageTask.java

@@ -32,6 +32,10 @@ import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * Reduces the file size of images to fit under a given limit by resizing them, maintaining both
+ * aspect ratio and orientation.
+ */
 public class DownsizeImageTask extends AsyncTask<Uri, Void, Boolean> {
     private static final String TAG = "DownsizeImageTask";
     private int sizeLimit;
@@ -39,6 +43,11 @@ public class DownsizeImageTask extends AsyncTask<Uri, Void, Boolean> {
     private Listener listener;
     private List<byte[]> resultList;
 
+    /**
+     * @param sizeLimit the maximum number of bytes each image can take
+     * @param contentResolver to resolve the specified images' URIs
+     * @param listener to whom the results are given
+     */
     public DownsizeImageTask(int sizeLimit, ContentResolver contentResolver, Listener listener) {
         this.sizeLimit = sizeLimit;
         this.contentResolver = contentResolver;
@@ -223,6 +232,7 @@ public class DownsizeImageTask extends AsyncTask<Uri, Void, Boolean> {
         super.onPostExecute(successful);
     }
 
+    /** Used to communicate the results of the task. */
     public interface Listener {
         void onSuccess(List<byte[]> contentList);
         void onFailure();

app/src/main/java/com/keylesspalace/tusky/util/HttpHeaderLink.java

@@ -15,6 +15,11 @@ import android.support.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * Represents one link and its parameters from the link header of an HTTP message.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc5988">RFC5988</a>
+ */
 public class HttpHeaderLink {
     private static class Parameter {
         public String name;
@@ -114,6 +119,10 @@ public class HttpHeaderLink {
         return -1;
     }
 
+    /**
+     * @param line the entire link header, not including the initial "Link:"
+     * @return all links found in the header
+     */
     public static List<HttpHeaderLink> parse(@Nullable String line) {
         List<HttpHeaderLink> linkList = new ArrayList<>();
         if (line != null) {
@@ -133,6 +142,11 @@ public class HttpHeaderLink {
         return linkList;
     }
 
+    /**
+     * @param links intended to be those returned by parse()
+     * @param relationType of the parameter "rel", commonly "next" or "prev"
+     * @return the link matching the given relation type
+     */
     @Nullable
     public static HttpHeaderLink findByRelationType(List<HttpHeaderLink> links,
             String relationType) {

app/src/main/java/com/keylesspalace/tusky/util/LinkHelper.java

@@ -46,6 +46,16 @@ public class LinkHelper {
         }
     }
 
+    /**
+     * Finds links, mentions, and hashtags in a piece of text and makes them clickable, associating
+     * them with callbacks to notify when they're clicked.
+     *
+     * @param view the returned text will be put in
+     * @param content containing text with mentions, links, or hashtags
+     * @param mentions any '@' mentions which are known to be in the content
+     * @param useCustomTabs whether to use custom tabs when opening web links
+     * @param listener to notify about particular spans that are clicked
+     */
     public static void setClickableText(TextView view, Spanned content,
             @Nullable Status.Mention[] mentions, boolean useCustomTabs,
             final LinkListener listener) {

app/src/main/java/com/keylesspalace/tusky/util/MediaUtils.java

@@ -43,6 +43,10 @@ import java.io.InputStream;
 public class MediaUtils {
     public static final int MEDIA_SIZE_UNKNOWN = -1;
 
+    /**
+     * Copies the entire contents of the given stream into a byte array and returns it. Beware of
+     * OutOfMemoryError for streams of unknown size.
+     */
     @Nullable
     public static byte[] inputStreamGetBytes(InputStream stream) {
         ByteArrayOutputStream buffer = new ByteArrayOutputStream();
@@ -59,6 +63,12 @@ public class MediaUtils {
         return buffer.toByteArray();
     }
 
+    /**
+     * Fetches the size of the media represented by the given URI, assuming it is openable and
+     * the ContentResolver is able to resolve it.
+     *
+     * @return the size of the media or {@link MediaUtils#MEDIA_SIZE_UNKNOWN}
+     */
     public static long getMediaSize(ContentResolver contentResolver, Uri uri) {
         long mediaSize;
         Cursor cursor = contentResolver.query(uri, null, null, null, null);
@@ -73,7 +83,7 @@ public class MediaUtils {
         return mediaSize;
     }
 
-    // Download an image with picasso
+    /** Download an image with picasso asynchronously and call the given listener when completed. */
     public static Target picassoImageTarget(final Context context, final MediaListener mediaListener) {
         final String imageName = "temp";
         return new Target() {

app/src/main/java/com/keylesspalace/tusky/util/NotificationMaker.java

@@ -42,9 +42,16 @@ import org.json.JSONArray;
 import org.json.JSONException;
 
 public class NotificationMaker {
-
     public static final String TAG = "NotificationMaker";
 
+    /**
+     * Takes a given Mastodon notification and either creates a new Android notification or updates
+     * the state of the existing notification to reflect the new interaction.
+     *
+     * @param context to access application preferences and services
+     * @param notifyId an arbitrary number to reference this notification for any future action
+     * @param body a new Mastodon notification
+     */
     public static void make(final Context context, final int notifyId, Notification body) {
         final SharedPreferences preferences =
                 PreferenceManager.getDefaultSharedPreferences(context);

app/src/main/java/com/keylesspalace/tusky/util/OkHttpUtils.java

@@ -46,18 +46,18 @@ import okhttp3.Request;
 import okhttp3.Response;
 
 public class OkHttpUtils {
-    static final String TAG = "OkHttpUtils"; // logging tag
+    private static final String TAG = "OkHttpUtils"; // logging tag
 
     /**
      * Makes a Builder with the maximum range of TLS versions and cipher suites enabled.
-     *
+     * <p>
      * It first tries the "approved" list of cipher suites given in OkHttp (the default in
      * ConnectionSpec.MODERN_TLS) and if that doesn't work falls back to the set of ALL enabled,
      * then falls back to plain http.
-     *
+     * <p>
      * API level 24 has a regression in elliptic curves where it only supports secp256r1, so this
      * first tries a fallback without elliptic curves at all, and then tries them after.
-     *
+     * <p>
      * TLS 1.1 and 1.2 have to be manually enabled on API levels 16-20.
      */
     @NonNull
@@ -104,7 +104,6 @@ public class OkHttpUtils {
         };
     }
 
-
     /**
      * Android version Nougat has a regression where elliptic curve cipher suites are supported, but
      * only the curve secp256r1 is allowed. So, first it's best to just disable all elliptic

app/src/main/java/com/keylesspalace/tusky/util/ParserUtils.java

@@ -19,7 +19,7 @@ import java.util.List;
 import static com.keylesspalace.tusky.util.StringUtils.QUOTE;
 
 /**
- * Inspect and Get the information from an URL
+ * Inspect and get the information from a URL.
  */
 public class ParserUtils {
     private static final String TAG = "ParserUtils";
@@ -56,7 +56,7 @@ public class ParserUtils {
         clipboard.setPrimaryClip(clip);
     }
 
-    // parse the HTML page
+    /** parse the HTML page */
     private HeaderInfo parsePageHeaderInfo(String urlStr) throws Exception {
         Connection con = Jsoup.connect(urlStr);
         HeaderInfo headerInfo = new HeaderInfo();

app/src/main/java/com/keylesspalace/tusky/util/SpanUtils.java

@@ -23,8 +23,16 @@ import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 public class SpanUtils {
+    /**
+     * @see <a href="https://github.com/tootsuite/mastodon/blob/master/app/models/tag.rb">
+     *     Tag#HASHTAG_RE</a>.
+     */
     private static final String TAG_REGEX = "(?:^|[^/)\\w])#([\\w_]*[\\p{Alpha}_][\\w_]*)";
     private static Pattern TAG_PATTERN = Pattern.compile(TAG_REGEX, Pattern.CASE_INSENSITIVE);
+    /**
+     * @see <a href="https://github.com/tootsuite/mastodon/blob/master/app/models/account.rb">
+     *     Account#MENTION_RE</a>
+     */
     private static final String MENTION_REGEX =
             "(?:^|[^/[:word:]])@([a-z0-9_]+(?:@[a-z0-9\\.\\-]+[a-z0-9]+)?)";
     private static Pattern MENTION_PATTERN =
@@ -98,6 +106,7 @@ public class SpanUtils {
         }
     }
 
+    /** Takes text containing mentions and hashtags and makes them the given colour. */
     public static void highlightSpans(Spannable text, int colour) {
         // Strip all existing colour spans.
         int n = text.length();

app/src/main/java/com/keylesspalace/tusky/util/ThemeUtils.java

@@ -26,6 +26,10 @@ import android.support.v4.content.ContextCompat;
 import android.util.TypedValue;
 import android.widget.ImageView;
 
+/**
+ * Provides runtime compatibility to obtain theme information and re-theme views, especially where
+ * the ability to do so is not supported in resource files.
+ */
 public class ThemeUtils {
     public static Drawable getDrawable(Context context, @AttrRes int attribute,
             @DrawableRes int fallbackDrawable) {