Add an initial menu for the reader, and some minor changes.

app/src/main/AndroidManifest.xml

@@ -15,7 +15,6 @@
         android:theme="@style/AppTheme" >
         <activity
             android:name=".ui.main.MainActivity"
-            android:launchMode="singleTop"
             android:theme="@style/AppTheme.NoActionBar" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/eu/kanade/mangafeed/data/database/models/Chapter.java

@@ -60,8 +60,10 @@ public class Chapter {
         return url.hashCode();
     }
 
-    public static Chapter newChapter() {
+    public static Chapter create() {
-        return new Chapter();
+        Chapter chapter = new Chapter();
+        chapter.chapter_number = -1;
+        return chapter;
     }
 
 }

app/src/main/java/eu/kanade/mangafeed/data/preference/PreferencesHelper.java

@@ -36,8 +36,8 @@ public class PreferencesHelper {
         prefs.edit().clear().apply();
     }
 
-    public boolean useFullscreenSet() {
+    public boolean isHideStatusBarSet() {
-        return prefs.getBoolean(getKey(R.string.pref_fullscreen_key), false);
+        return prefs.getBoolean(getKey(R.string.pref_hide_status_bar_key), true);
     }
 
     public int getDefaultViewer() {

app/src/main/java/eu/kanade/mangafeed/data/source/base/BaseSource.java

@@ -92,9 +92,4 @@ public abstract class BaseSource {
         return builder;
     }
 
-    // Number of images to download at the same time. 3 by default
-    protected int overrideNumberOfConcurrentPageDownloads() {
-        return 3;
-    }
-
 }

app/src/main/java/eu/kanade/mangafeed/data/source/base/Source.java

@@ -97,8 +97,7 @@ public abstract class Source extends BaseSource {
     public Observable<Page> getRemainingImageUrlsFromPageList(final List<Page> pages) {
         return Observable.from(pages)
                 .filter(page -> page.getImageUrl() == null)
-                .window(overrideNumberOfConcurrentPageDownloads())
+                .concatMap(this::getImageUrlFromPage);
-                .concatMap(batchedPages -> batchedPages.concatMap(this::getImageUrlFromPage));
     }
 
     public Observable<Page> getImageUrlFromPage(final Page page) {

app/src/main/java/eu/kanade/mangafeed/data/source/online/english/Batoto.java

@@ -305,7 +305,7 @@ public class Batoto extends Source {
     }
 
     private Chapter constructChapterFromHtmlBlock(Element chapterElement) {
-        Chapter newChapter = Chapter.newChapter();
+        Chapter newChapter = Chapter.create();
 
         Element urlElement = chapterElement.select("a[href^=http://bato.to/reader").first();
         Element nameElement = urlElement;

app/src/main/java/eu/kanade/mangafeed/data/source/online/english/Mangahere.java

@@ -288,7 +288,7 @@ public class Mangahere extends Source {
     }
 
     private Chapter constructChapterFromHtmlBlock(Element chapterElement) {
-        Chapter newChapter = Chapter.newChapter();
+        Chapter newChapter = Chapter.create();
 
         Element urlElement = chapterElement.select("a").first();
         Element nameElement = chapterElement.select("a").first();

app/src/main/java/eu/kanade/mangafeed/ui/base/activity/BaseActivity.java

@@ -3,6 +3,7 @@ package eu.kanade.mangafeed.ui.base.activity;
 import android.content.Context;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
+import android.view.MenuItem;
 
 public class BaseActivity extends AppCompatActivity {
 
@@ -22,7 +23,28 @@ public class BaseActivity extends AppCompatActivity {
             getSupportActionBar().setTitle(getString(titleResource));
     }
 
+    public void setToolbarSubtitle(String title) {
+        if (getSupportActionBar() != null)
+            getSupportActionBar().setSubtitle(title);
+    }
+
+    public void setToolbarSubtitle(int titleResource) {
+        if (getSupportActionBar() != null)
+            getSupportActionBar().setSubtitle(getString(titleResource));
+    }
+
     public Context getActivity() {
         return this;
     }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case android.R.id.home:
+                onBackPressed();
+                return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
 }

app/src/main/java/eu/kanade/mangafeed/ui/manga/MangaActivity.java

@@ -10,7 +10,6 @@ import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentPagerAdapter;
 import android.support.v4.view.ViewPager;
 import android.support.v7.widget.Toolbar;
-import android.view.MenuItem;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
@@ -61,16 +60,6 @@ public class MangaActivity extends BaseRxActivity<MangaPresenter> {
             getPresenter().queryManga(manga_id);
     }
 
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        switch (item.getItemId()) {
-            case android.R.id.home:
-                finish();
-                return true;
-        }
-        return super.onOptionsItemSelected(item);
-    }
-
     private void disableToolbarElevation() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
             toolbar.setElevation(0);

app/src/main/java/eu/kanade/mangafeed/ui/reader/ReaderActivity.java

@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.v7.widget.Toolbar;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.WindowManager;
@@ -18,6 +19,8 @@ import butterknife.Bind;
 import butterknife.ButterKnife;
 import eu.kanade.mangafeed.App;
 import eu.kanade.mangafeed.R;
+import eu.kanade.mangafeed.data.database.models.Chapter;
+import eu.kanade.mangafeed.data.database.models.Manga;
 import eu.kanade.mangafeed.data.preference.PreferencesHelper;
 import eu.kanade.mangafeed.data.source.model.Page;
 import eu.kanade.mangafeed.ui.base.activity.BaseRxActivity;
@@ -34,11 +37,14 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
 
     @Bind(R.id.page_number) TextView pageNumber;
     @Bind(R.id.reader) FrameLayout container;
+    @Bind(R.id.toolbar) Toolbar toolbar;
 
     @Inject PreferencesHelper prefs;
 
     private BaseReader viewer;
-    private boolean isFullscreen;
+    private ReaderMenu readerMenu;
+
+    private int uiFlags;
 
     private static final int LEFT_TO_RIGHT = 1;
     private static final int RIGHT_TO_LEFT = 2;
@@ -57,27 +63,19 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
         setContentView(R.layout.activity_reader);
         ButterKnife.bind(this);
 
-        if (prefs.useFullscreenSet())
+        setupToolbar(toolbar);
-            enableFullScreen();
 
+        readerMenu = new ReaderMenu(this, prefs);
+        createUiHideFlags();
         enableHardwareAcceleration();
 
         viewer = getViewer();
     }
-    
-    public void onPageListReady(List<Page> pages) {
-        viewer.onPageListReady(pages);
-        viewer.updatePageNumber();
-    }
 
-    public void onPageListError() {
+    @Override
-        finish();
+    protected void onResume() {
-        ToastUtil.showShort(this, R.string.page_list_error);
+        super.onResume();
-    }
+        hideSystemUI();
-
-    public void onPageChanged(int currentPageIndex, int totalPages) {
-        String page = (currentPageIndex + 1) + "/" + totalPages;
-        pageNumber.setText(page);
     }
 
     @Override
@@ -87,42 +85,37 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
         super.onPause();
     }
 
+    private void createUiHideFlags() {
+        uiFlags |= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
+        if (prefs.isHideStatusBarSet())
+            uiFlags |= View.SYSTEM_UI_FLAG_FULLSCREEN;
+        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT)
+            uiFlags |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
+    }
+
+    public void onChapterReady(List<Page> pages, Manga manga, Chapter chapter) {
+        viewer.onPageListReady(pages);
+        viewer.updatePageNumber();
+        readerMenu.onChapterReady(pages.size(), manga, chapter);
+    }
+
+    public void onChapterError() {
+        finish();
+        ToastUtil.showShort(this, R.string.page_list_error);
+    }
+
+    public void onPageChanged(int currentPageIndex, int totalPages) {
+        String page = (currentPageIndex + 1) + "/" + totalPages;
+        pageNumber.setText(page);
+        readerMenu.onPageChanged(currentPageIndex);
+    }
+
     public void setSelectedPage(int pageIndex) {
         viewer.setSelectedPage(pageIndex);
     }
 
-    public void enableFullScreen() {
+    public void hideSystemUI() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
+        getWindow().getDecorView().setSystemUiVisibility(uiFlags);
-            getWindow().getDecorView().setSystemUiVisibility(
-                    View.SYSTEM_UI_FLAG_LOW_PROFILE
-                            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
-                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
-                            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
-                            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
-                            | View.SYSTEM_UI_FLAG_FULLSCREEN
-                            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
-            );
-        } else {
-            getWindow().getDecorView().setSystemUiVisibility(
-                    View.SYSTEM_UI_FLAG_LOW_PROFILE
-            );
-        }
-        isFullscreen = true;
-    }
-
-    public void disableFullscreen() {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-            getWindow().getDecorView().setSystemUiVisibility(
-                    View.SYSTEM_UI_FLAG_LAYOUT_STABLE
-                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
-                            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
-            );
-        } else {
-            getWindow().getDecorView().setSystemUiVisibility(
-                    View.VISIBLE
-            );
-        }
-        isFullscreen = false;
     }
 
     public void enableHardwareAcceleration() {
@@ -136,14 +129,7 @@ public class ReaderActivity extends BaseRxActivity<ReaderPresenter> {
     }
 
     public void onCenterSingleTap() {
-        toggleFullscreen();
+        readerMenu.toggle();
-    }
-
-    private void toggleFullscreen() {
-        if (isFullscreen)
-            disableFullscreen();
-        else
-            enableFullScreen();
     }
 
     private BaseReader getViewer() {

app/src/main/java/eu/kanade/mangafeed/ui/reader/ReaderMenu.java

@@ -0,0 +1,80 @@
+package eu.kanade.mangafeed.ui.reader;
+
+import android.view.View;
+import android.widget.RelativeLayout;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+import java.text.DecimalFormat;
+
+import butterknife.Bind;
+import butterknife.ButterKnife;
+import eu.kanade.mangafeed.R;
+import eu.kanade.mangafeed.data.database.models.Chapter;
+import eu.kanade.mangafeed.data.database.models.Manga;
+import eu.kanade.mangafeed.data.preference.PreferencesHelper;
+
+public class ReaderMenu {
+
+    @Bind(R.id.reader_menu) RelativeLayout menu;
+    @Bind(R.id.current_page) TextView currentPage;
+    @Bind(R.id.page_seeker) SeekBar seekBar;
+    @Bind(R.id.total_pages) TextView totalPages;
+
+
+    private ReaderActivity activity;
+    private PreferencesHelper preferences;
+    private boolean showing;
+    private DecimalFormat decimalFormat;
+
+    public ReaderMenu(ReaderActivity activity, PreferencesHelper preferences) {
+        this.activity = activity;
+        this.preferences = preferences;
+        ButterKnife.bind(this, activity);
+
+        seekBar.setOnSeekBarChangeListener(new PageSeekBarChangeListener());
+        decimalFormat = new DecimalFormat("#.##");
+    }
+
+    public void toggle() {
+        toggle(!showing);
+    }
+
+    private void toggle(boolean show) {
+        menu.setVisibility(show ? View.VISIBLE : View.GONE);
+        showing = show;
+    }
+
+    public void onChapterReady(int numPages, Manga manga, Chapter chapter) {
+        totalPages.setText("" + numPages);
+        seekBar.setMax(numPages - 1);
+
+        activity.setToolbarTitle(manga.title);
+        activity.setToolbarSubtitle(chapter.chapter_number != -1 ?
+                        activity.getString(R.string.chapter_subtitle,
+                                decimalFormat.format(chapter.chapter_number)) :
+                        chapter.name);
+
+    }
+
+    public void onPageChanged(int pageIndex) {
+        currentPage.setText("" + (pageIndex + 1));
+        seekBar.setProgress(pageIndex);
+    }
+
+    class PageSeekBarChangeListener implements SeekBar.OnSeekBarChangeListener {
+
+        @Override
+        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+            if (fromUser) {
+                activity.setSelectedPage(progress);
+            }
+        }
+
+        @Override
+        public void onStartTrackingTouch(SeekBar seekBar) {}
+
+        @Override
+        public void onStopTrackingTouch(SeekBar seekBar) {}
+    }
+}

app/src/main/java/eu/kanade/mangafeed/ui/reader/ReaderPresenter.java

@@ -66,12 +66,12 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
                             start(RETRY_IMAGES);
                         }),
                 (view, pages) -> {
-                    view.onPageListReady(pages);
+                    view.onChapterReady(pages, manga, chapter);
                     if (currentPage != 0)
                         view.setSelectedPage(currentPage);
                 },
                 (view, error) -> {
-                    view.onPageListError();
+                    view.onChapterError();
                 });
 
         restartableReplay(GET_PAGE_IMAGES,
@@ -158,7 +158,7 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
             pages = Observable.from(pageList)
                     .filter(page -> page.getImageUrl() != null)
                     .mergeWith(source.getRemainingImageUrlsFromPageList(pageList))
-                    .flatMap(source::getCachedImage);
+                    .flatMap(source::getCachedImage, 3);
         } else {
             File chapterDir = downloadManager.getAbsoluteChapterDirectory(source, manga, chapter);
 
@@ -178,7 +178,8 @@ public class ReaderPresenter extends BasePresenter<ReaderActivity> {
                     return Observable.just(page);
                 })
                 .flatMap(source::getCachedImage)
-                .subscribeOn(Schedulers.io());
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread());
     }
 
     public void setCurrentPage(int currentPage) {

app/src/main/java/eu/kanade/mangafeed/ui/setting/SettingsActivity.java

@@ -2,7 +2,6 @@ package eu.kanade.mangafeed.ui.setting;
 
 import android.os.Bundle;
 import android.support.v7.widget.Toolbar;
-import android.view.MenuItem;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
@@ -32,14 +31,4 @@ public class SettingsActivity extends BaseActivity {
         if( !getFragmentManager().popBackStackImmediate() ) super.onBackPressed();
     }
 
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        switch (item.getItemId()) {
-            case android.R.id.home:
-                onBackPressed();
-                return true;
-        }
-        return super.onOptionsItemSelected(item);
-    }
-
 }

app/src/main/java/eu/kanade/mangafeed/util/ChapterRecognition.java

@@ -14,7 +14,7 @@ public class ChapterRecognition {
     private static Pattern p2 = Pattern.compile("(\\d+[\\.,]?\\d*)");
 
     public static void parseChapterNumber(Chapter chapter, Manga manga) {
-        if (chapter.chapter_number != 0)
+        if (chapter.chapter_number != -1)
             return;
 
         // Remove spaces and convert to lower case

app/src/main/res/layout/activity_reader.xml

@@ -6,17 +6,19 @@
     <FrameLayout
         android:id="@+id/reader"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content">
+        android:layout_height="match_parent">
     </FrameLayout>
 
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:padding="8dp"
+        android:padding="4dp"
         android:layout_gravity="bottom|left"
-        android:background="@color/bg_light_grey"
+        android:background="@color/page_number_background"
         android:textColor="@color/black_87pc"
         android:textSize="12sp"
         android:id="@+id/page_number"/>
 
+    <include layout="@layout/reader_menu"/>
+
 </FrameLayout>

app/src/main/res/layout/reader_menu.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:id="@+id/reader_menu"
+    android:visibility="gone">
+
+    <include layout="@layout/toolbar"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@color/reader_menu_background"
+        android:layout_alignParentBottom="true">
+
+        <TextView
+            android:id="@+id/current_page"
+            android:layout_width="32dp"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="8dp"
+            android:layout_gravity="center_vertical"
+            android:textColor="@color/light_grey"
+            android:gravity="center_horizontal" />
+
+        <SeekBar
+            android:id="@+id/page_seeker"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:layout_gravity="center_vertical" />
+
+        <TextView
+            android:id="@+id/total_pages"
+            android:layout_width="32dp"
+            android:layout_height="wrap_content"
+            android:layout_marginRight="8dp"
+            android:layout_gravity="center_vertical"
+            android:textColor="@color/light_grey"
+            android:gravity="center_horizontal" />
+
+    </LinearLayout>
+
+</RelativeLayout>

app/src/main/res/values/colors.xml

@@ -17,4 +17,6 @@
     <color name="library_text_background">#E8E8E8</color>
     <color name="chapter_read_text">#909090</color>
     <color name="list_choice_pressed_bg_light">#607D8B</color>
+    <color name="page_number_background">#AAE9E9E9</color>
+    <color name="reader_menu_background">#333333</color>
 </resources>

app/src/main/res/values/keys.xml

@@ -3,7 +3,7 @@
     <string name="pref_category_reader_key">pref_category_reader_key</string>
     <string name="pref_category_accounts_key">pref_category_accounts_key</string>
     <string name="pref_category_downloads_key">pref_category_downloads_key</string>
-    <string name="pref_fullscreen_key">pref_fullscreen_key</string>
+    <string name="pref_hide_status_bar_key">pref_hide_status_bar_key</string>
     <string name="pref_default_viewer_key">pref_default_viewer_key</string>
     <string name="pref_download_directory_key">pref_download_directory_key</string>
     <string name="pref_download_threads_key">pref_download_threads_key</string>

app/src/main/res/values/strings.xml

@@ -27,7 +27,7 @@
     <string name="pref_category_downloads">Downloads</string>
 
       <!-- Reader section -->
-    <string name="pref_fullscreen_mode">Read in fullscreen</string>
+    <string name="pref_hide_status_bar">Hide status bar</string>
     <string name="pref_viewer_type">Default viewer</string>
     <string name="left_to_right_viewer">Left to right</string>
     <string name="right_to_left_viewer">Right to left</string>
@@ -75,6 +75,7 @@
     <string name="download_progress">Downloaded %1$d%%</string>
     <string name="chapter_progress">Page: %1$d</string>
     <string name="page_list_error">Error fetching page list. Is network available?</string>
+    <string name="chapter_subtitle">Chapter %1$s</string>
 
     <!-- Library update service notifications -->
     <string name="notification_progress">Update progress: %1$d/%2$d</string>

app/src/main/res/xml/pref_reader.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <CheckBoxPreference android:title="@string/pref_fullscreen_mode"
+    <CheckBoxPreference android:title="@string/pref_hide_status_bar"
-        android:key="@string/pref_fullscreen_key"
+        android:key="@string/pref_hide_status_bar_key"
         android:defaultValue="true" />
 
     <ListPreference android:title="@string/pref_viewer_type"