launcher: Animated vector describing swipe gesture

Replace the short video with an animated vector image that shows the
swipe gesture.

This is much lighter and reliable than the mp4 video, which failed to
play on many devices.

Source for the image of the key is in inkscape SVG format in srcs/res
and is converted to an android drawable when needed. The swipe animation
is hand-written.

4 files changed, 281 insertions, 29 deletions

diff --git a/srcs/juloo.keyboard2/LauncherActivity.java b/srcs/juloo.keyboard2/LauncherActivity.java
index 2ca241a..57c5e2b 100644
--- a/srcs/juloo.keyboard2/LauncherActivity.java
+++ b/srcs/juloo.keyboard2/LauncherActivity.java
@@ -3,11 +3,14 @@ package juloo.keyboard2;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Intent;
+import android.graphics.drawable.Animatable;
 import android.media.AudioManager;
 import android.media.MediaPlayer;
 import android.net.Uri;
 import android.os.Build.VERSION;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
 import android.provider.Settings;
 import android.view.KeyEvent;
 import android.view.Menu;
@@ -15,28 +18,49 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
+import android.widget.ImageView;
 import android.widget.TextView;
-import android.widget.VideoView;
+import java.util.ArrayList;
+import java.util.List;
 
-public class LauncherActivity extends Activity
+public class LauncherActivity extends Activity implements Handler.Callback
 {
   /** Text is replaced when receiving key events. */
-  VideoView _intro_video;
   TextView _tryhere_text;
   EditText _tryhere_area;
+  /** Periodically restart the animations. */
+  List<Animatable> _animations;
+  Handler _handler;
 
   @Override
   public void onCreate(Bundle savedInstanceState)
   {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.launcher_activity);
-    _intro_video = (VideoView)findViewById(R.id.launcher_intro_video);
     _tryhere_text = (TextView)findViewById(R.id.launcher_tryhere_text);
     _tryhere_area = (EditText)findViewById(R.id.launcher_tryhere_area);
     if (VERSION.SDK_INT >= 28)
       _tryhere_area.addOnUnhandledKeyEventListener(
           this.new Tryhere_OnUnhandledKeyEventListener());
-    setup_intro_video(_intro_video);
+  }
+
+  @Override
+  public void onStart()
+  {
+    super.onStart();
+    _animations = new ArrayList<Animatable>();
+    _animations.add(find_anim(R.id.launcher_anim_swipe));
+    _handler = new Handler(getMainLooper(), this);
+    _handler.sendEmptyMessageDelayed(0, 500);
+  }
+
+  @Override
+  public boolean handleMessage(Message _msg)
+  {
+    for (Animatable anim : _animations)
+      anim.start();
+    _handler.sendEmptyMessageDelayed(0, 3000);
+    return true;
   }
 
   @Override
@@ -70,31 +94,10 @@ public class LauncherActivity extends Activity
     imm.showInputMethodPicker();
   }
 
-  static void setup_intro_video(final VideoView v)
+  Animatable find_anim(int id)
   {
-    if (VERSION.SDK_INT >= 26)
-      v.setAudioFocusRequest(AudioManager.AUDIOFOCUS_NONE);
-    v.setVideoURI(Uri.parse("android.resource://" +
-          v.getContext().getPackageName() + "/" + R.raw.intro_video));
-    v.setOnPreparedListener(new MediaPlayer.OnPreparedListener()
-        {
-          @Override
-          public void onPrepared(MediaPlayer mp)
-          {
-            mp.setLooping(true);
-          }
-        });
-    v.setOnErrorListener(new MediaPlayer.OnErrorListener()
-        {
-          @Override
-          public boolean onError(MediaPlayer mp, int what, int extra)
-          {
-            v.stopPlayback();
-            v.setVisibility(View.GONE);
-            return true;
-          }
-        });
-    v.start();
+    ImageView img = (ImageView)findViewById(id);
+    return (Animatable)img.getDrawable();
   }
 
   @TargetApi(28)
diff --git a/srcs/res/SvgToVector.java b/srcs/res/SvgToVector.java
new file mode 100644
index 0000000..78486fe
--- /dev/null
+++ b/srcs/res/SvgToVector.java
@@ -0,0 +1,32 @@
+package srcs.res;
+
+import com.android.ide.common.vectordrawable.Svg2Vector;
+import java.io.File;
+import java.io.FileOutputStream;
+
+/** Inspired from Bernard Ladenthin's answer:
+    https://stackoverflow.com/a/78898372 */
+public class SvgToVector
+{
+  public static void main(String[] args)
+  {
+    if (args.length != 2)
+    {
+      System.out.println("Usage: svg_to_vector <input_file> <output_file>");
+      return;
+    }
+    try
+    {
+      File input_file = new File(args[0]);
+      FileOutputStream output_stream = new FileOutputStream(args[1]);
+      String warnings;
+      warnings = Svg2Vector.parseSvgToXml(input_file, output_stream);
+      System.err.println(warnings);
+    }
+    catch (Exception e)
+    {
+      e.printStackTrace();
+      System.exit(2);
+    }
+  }
+}
diff --git a/srcs/res/doc_key.svg b/srcs/res/doc_key.svg
new file mode 100644
index 0000000..73e6a2a
--- /dev/null
+++ b/srcs/res/doc_key.svg
@@ -0,0 +1,192 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="35mm"
+   height="40mm"
+   viewBox="0 0 35 40"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.3.2 (091e20ef0f, 2023-11-25)"
+   sodipodi:docname="doc_key.svg"
+   inkscape:export-filename="key_u.svg"
+   inkscape:export-xdpi="96"
+   inkscape:export-ydpi="96"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#1b1b1b"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#1b1b1b"
+     inkscape:document-units="mm"
+     inkscape:zoom="4.6038101"
+     inkscape:cx="160.95364"
+     inkscape:cy="75.69817"
+     inkscape:window-width="2560"
+     inkscape:window-height="1440"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer2">
+    <inkscape:page
+       x="0"
+       y="0"
+       width="35"
+       height="40"
+       id="page1"
+       margin="0"
+       bleed="0"
+       inkscape:label="g" />
+    <inkscape:page
+       x="45"
+       y="0"
+       width="35"
+       height="40"
+       id="page2"
+       margin="0"
+       bleed="0"
+       inkscape:label="u" />
+  </sodipodi:namedview>
+  <defs
+     id="defs1" />
+  <g
+     inkscape:groupmode="layer"
+     id="layer2"
+     inkscape:label="U"
+     style="display:inline">
+    <g
+       inkscape:label="Background"
+       inkscape:groupmode="layer"
+       id="layer1"
+       style="display:inline"
+       transform="translate(42.916821,-9.9998472)">
+      <rect
+         style="display:inline;fill:#333333;fill-opacity:1;stroke:#404040;stroke-width:0.251;stroke-dasharray:none;stroke-opacity:1;paint-order:fill markers stroke"
+         id="rect1"
+         width="14.749311"
+         height="19.74971"
+         x="12.208678"
+         y="20.125347"
+         ry="1.1332803"
+         inkscape:label="rect1" />
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:8.48996px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;display:inline;fill:#fdfdfd;fill-opacity:1;stroke:none;stroke-width:0.265729;stroke-dasharray:none;stroke-opacity:1;paint-order:fill markers stroke"
+       x="59.864403"
+       y="22.246796"
+       id="text1"
+       inkscape:label="text1"
+       inkscape:transform-center-x="-0.00074323194"
+       inkscape:transform-center-y="-0.001350474"
+       transform="scale(1.0003873,0.99961285)"><tspan
+         id="tspan1"
+         sodipodi:role="line"
+         x="59.864403"
+         y="22.246796"
+         style="stroke-width:0.265729">u</tspan><tspan
+         id="tspan2"
+         sodipodi:role="line"
+         x="59.864403"
+         y="32.859245"
+         style="stroke-width:0.265729" /></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;display:inline;fill:#cccccc;fill-opacity:1;stroke:none;stroke-width:0.265728;stroke-dasharray:none;stroke-opacity:1;paint-order:fill markers stroke"
+       x="55.882885"
+       y="28.802013"
+       id="text3"
+       transform="scale(1.0003873,0.99961285)"
+       inkscape:label="text3"><tspan
+         sodipodi:role="line"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;fill:#cccccc;fill-opacity:1;stroke-width:0.265729"
+         x="55.882885"
+         y="28.802013"
+         id="tspan4">&amp;</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;display:inline;fill:#cccccc;fill-opacity:1;stroke:none;stroke-width:0.265728;stroke-dasharray:none;stroke-opacity:1;paint-order:fill markers stroke"
+       x="65.686905"
+       y="15.189408"
+       id="text5"
+       transform="scale(1.0003873,0.99961285)"><tspan
+         sodipodi:role="line"
+         id="tspan5"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;fill:#cccccc;fill-opacity:1;stroke-width:0.265729"
+         x="65.686905"
+         y="15.189408">7</tspan></text>
+  </g>
+  <g
+     inkscape:groupmode="layer"
+     id="layer3"
+     inkscape:label="G"
+     style="display:inline">
+    <g
+       inkscape:label="Background"
+       inkscape:groupmode="layer"
+       id="g2"
+       style="display:inline">
+      <rect
+         style="display:inline;fill:#333333;fill-opacity:1;stroke:#404040;stroke-width:0.251;stroke-dasharray:none;stroke-opacity:1;paint-order:fill markers stroke"
+         id="rect2"
+         width="14.749311"
+         height="19.74971"
+         x="10.125345"
+         y="10.125347"
+         ry="1.1332803"
+         inkscape:label="rect1" />
+    </g>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;display:inline;fill:#cccccc;fill-opacity:1;stroke:none;stroke-width:0.265728;stroke-dasharray:none;stroke-opacity:1;paint-order:fill markers stroke"
+       x="10.887006"
+       y="27.77977"
+       id="text3-3"
+       transform="scale(1.0003873,0.99961285)"
+       inkscape:label="text3"><tspan
+         sodipodi:role="line"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;fill:#cccccc;fill-opacity:1;stroke-width:0.265729"
+         x="10.887006"
+         y="27.77977"
+         id="tspan4-7">_</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:8.48996px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;display:inline;fill:#fdfdfd;fill-opacity:1;stroke:none;stroke-width:0.265729;stroke-dasharray:none;stroke-opacity:1;paint-order:fill markers stroke"
+       x="14.868526"
+       y="22.204519"
+       id="text1-2"
+       inkscape:label="text1"
+       inkscape:transform-center-x="-0.00074323194"
+       inkscape:transform-center-y="-0.001350474"
+       transform="scale(1.0003873,0.99961285)"><tspan
+         id="tspan1-0"
+         sodipodi:role="line"
+         x="14.868526"
+         y="22.204519"
+         style="stroke-width:0.265729">g</tspan><tspan
+         id="tspan2-2"
+         sodipodi:role="line"
+         x="14.868526"
+         y="32.816971"
+         style="stroke-width:0.265729" /></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;display:inline;fill:#cccccc;fill-opacity:1;stroke:none;stroke-width:0.265728;stroke-dasharray:none;stroke-opacity:1;paint-order:fill markers stroke"
+       x="20.691027"
+       y="15.147132"
+       id="text5-5"
+       transform="scale(1.0003873,0.99961285)"><tspan
+         sodipodi:role="line"
+         id="tspan5-9"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.65997px;font-family:'Fira Code';-inkscape-font-specification:'Fira Code, @wght=500';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-variation-settings:'wght' 500;fill:#cccccc;fill-opacity:1;stroke-width:0.265729"
+         x="20.691027"
+         y="15.147132">-</tspan></text>
+  </g>
+</svg>
diff --git a/srcs/res/gen_doc_key_drawables.sh b/srcs/res/gen_doc_key_drawables.sh
new file mode 100644
index 0000000..ff89793
--- /dev/null
+++ b/srcs/res/gen_doc_key_drawables.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+set -e
+cd "$(dirname $0)"
+
+DRAWABLE_DIR=../../res/drawable
+ANDROID_LIB=$ANDROID_SDK_ROOT/tools/lib
+
+first () { echo "$1"; }
+JAVA_ARGS=(
+  -classpath
+  "$(first $ANDROID_LIB/sdk-common-*.jar):$(first $ANDROID_LIB/common-*.jar)"
+)
+svg_to_vector ()
+{
+  java "${JAVA_ARGS[@]}" SvgToVector.java "$@"
+}
+
+TMP=`mktemp -d`
+trap "rm -r '$TMP'" EXIT
+set -x
+
+inkscape doc_key.svg -o "$TMP/doc_key_u.svg" -C --export-page 2 --export-plain-svg --export-text-to-path
+
+svg_to_vector "$TMP/doc_key_u.svg" "$DRAWABLE_DIR/doc_key_u.xml"