Spell checking (#1137)

This adds dictionary-based spell checking to the keyboard. The keyboard looks at the word being typed and matches it against a dictionary to either complete the rest of the word or find alternative spellings.

The core of this feature is implemented in cdict, which is included as a
submodule in vendor/cidct.

Cdict is developped at https://github.com/Julow/cdict
The dictionaries are hosted at https://github.com/Julow/Unexpected-Keyboard-dictionaries/
The wordlists used to build the dictionaries are the same ones used by
HeliBoard from https://codeberg.org/Helium314/aosp-dictionaries

- Add an activity accessible from the launcher app that lists available
  dictionaries with a download button.
  The DictionaryListView view shows the list of available dictionaries and
  handles downloading and installing them.

- The Dictionaries class manages installed dictionaries. Dictionaries are
  installed as individual files into the app's private directory.

- Available dictionaries are listed in dictionaries.xml, which is generated
  when building Unexpected-Keyboard-dictionaries.
  method.xml mentions the dictionary name for each locales.

4 files changed, 15 insertions, 1 deletions

diff --git a/res/layout/candidates_status_no_dict.xml b/res/layout/candidates_status_no_dict.xml
index 6ba20b9..8bd1e37 100644
--- a/res/layout/candidates_status_no_dict.xml
+++ b/res/layout/candidates_status_no_dict.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" style="@style/candidates_status">
   <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/candidates_status_no_dict"/>
-  <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/candidates_status_install"/>
+  <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/candidates_status_install" android:onClick="launch_dictionaries_activity"/>
 </LinearLayout>
diff --git a/res/layout/dictionaries_activity.xml b/res/layout/dictionaries_activity.xml
new file mode 100644
index 0000000..96b1bcb
--- /dev/null
+++ b/res/layout/dictionaries_activity.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:fillViewport="true" android:fitsSystemWindows="true">
+  <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical">
+    <TextView style="@style/paragraph" android:text="@string/dictionaries_from_internet"/>
+    <juloo.keyboard2.dict.DictionaryListView style="@style/dictionary_list_view"/>
+  </LinearLayout>
+</ScrollView>
diff --git a/res/layout/dictionary_download_item.xml b/res/layout/dictionary_download_item.xml
new file mode 100644
index 0000000..e6dd3c6
--- /dev/null
+++ b/res/layout/dictionary_download_item.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" style="@style/dictionary_download_item">
+  <TextView android:id="@+id/dictionary_download_locale" style="@style/dictionary_download_locale"/>
+  <TextView android:id="@+id/dictionary_download_size" style="@style/dictionary_download_size"/>
+  <View android:id="@+id/dictionary_download_button" style="@style/dictionary_download_button" android:background="@drawable/ic_download"/>
+</LinearLayout>
diff --git a/res/layout/launcher_activity.xml b/res/layout/launcher_activity.xml
index 20df09a..b4c23ab 100644
--- a/res/layout/launcher_activity.xml
+++ b/res/layout/launcher_activity.xml
@@ -4,6 +4,7 @@
     <TextView style="@style/paragraph" android:text="@string/launcher_description"/>
     <Button style="@style/paragraph" android:text="@string/launcher_button_imesettings" android:onClick="launch_imesettings" android:layout_width="wrap_content"/>
     <Button style="@style/paragraph" android:text="@string/launcher_button_imepicker" android:onClick="launch_imepicker" android:layout_width="wrap_content"/>
+    <Button style="@style/paragraph" android:text="@string/launcher_button_dictionaries" android:onClick="launch_dictionaries_activity" android:layout_width="wrap_content"/>
     <LinearLayout style="@style/anim_box">
       <ImageView style="@style/anim" android:id="@+id/launcher_anim_swipe" android:background="@drawable/doc_key_u" android:src="@drawable/doc_anim_swipe"/>
       <TextView style="@style/anim_text" android:text="@string/launcher_anim_7"/>