Add play in earth with photo overlays

MyTracks/src/com/google/android/apps/mytracks/io/file/KmlTrackWriter.java

@@ -18,6 +18,7 @@ package com.google.android.apps.mytracks.io.file;
 import com.google.android.apps.mytracks.content.DescriptionGenerator;
 import com.google.android.apps.mytracks.content.DescriptionGeneratorImpl;
 import com.google.android.apps.mytracks.content.MyTracksLocation;
+import com.google.android.apps.mytracks.content.MyTracksProviderUtils;
 import com.google.android.apps.mytracks.content.Sensor;
 import com.google.android.apps.mytracks.content.Sensor.SensorData;
 import com.google.android.apps.mytracks.content.Sensor.SensorDataSet;
@@ -30,7 +31,9 @@ import com.google.android.maps.mytracks.R;
 import com.google.common.annotations.VisibleForTesting;
 
 import android.content.Context;
+import android.database.Cursor;
 import android.location.Location;
+import android.net.Uri;
 
 import java.io.OutputStream;
 import java.io.PrintWriter;
@@ -66,6 +69,7 @@ public class KmlTrackWriter implements TrackFormatWriter {
 
   private final Context context;
   private final DescriptionGenerator descriptionGenerator;  
+  private final MyTracksProviderUtils myTracksProviderUtils;
   private PrintWriter printWriter;
   private ArrayList<Integer> powerList = new ArrayList<Integer>();
   private ArrayList<Integer> cadenceList = new ArrayList<Integer>();
@@ -82,6 +86,7 @@ public class KmlTrackWriter implements TrackFormatWriter {
   KmlTrackWriter(Context context, DescriptionGenerator descriptionGenerator) {
     this.context = context;
     this.descriptionGenerator = descriptionGenerator;
+    this.myTracksProviderUtils = MyTracksProviderUtils.Factory.get(context);
   }
 
   @Override
@@ -158,8 +163,15 @@ public class KmlTrackWriter implements TrackFormatWriter {
     if (printWriter != null) {
       String styleName = waypoint.getType() == WaypointType.STATISTICS ? STATISTICS_STYLE
           : WAYPOINT_STYLE;
-      writePlacemark(waypoint.getName(), waypoint.getCategory(), waypoint.getDescription(),
+      String photoUrl = waypoint.getPhotoUrl();
-          styleName, waypoint.getLocation());
+      if (photoUrl != null && !photoUrl.equals("")) {
+        float heading = getHeading(waypoint.getTrackId(), waypoint.getLocation());
+        writePhotoOverlay(waypoint.getName(), waypoint.getCategory(), waypoint.getDescription(),
+            styleName, waypoint.getLocation(), photoUrl, heading);
+      } else {
+        writePlacemark(waypoint.getName(), waypoint.getCategory(), waypoint.getDescription(),
+            styleName, waypoint.getLocation());
+      }
     }
   }
 
@@ -307,6 +319,76 @@ public class KmlTrackWriter implements TrackFormatWriter {
     }
   }
   
+  /**
+   * Writes a photo overlay.
+   * 
+   * @param name the name
+   * @param category the category
+   * @param description the description
+   * @param styleName the style name
+   * @param location the location
+   * @param photoUrl the photo url
+   * @param heading the heading
+   */
+  private void writePhotoOverlay(String name, String category, String description, String styleName,
+      Location location, String photoUrl, float heading) {
+    if (location != null) {
+      printWriter.println("<PhotoOverlay>");
+      printWriter.println("<name>" + StringUtils.formatCData(name) + "</name>");
+      printWriter.println("<description>"
+          + StringUtils.formatCData(StringUtils.getCategoryDescription(category, description))
+          + "</description>");
+      printWriter.print("<Camera>");
+      printWriter.print("<longitude>" + location.getLongitude() + "</longitude>");
+      printWriter.print("<latitude>" + location.getLatitude() + "</latitude>");
+      printWriter.print("<altitude>20</altitude>");
+      printWriter.print("<heading>" + heading + "</heading>");
+      printWriter.print("<tilt>90</tilt>");
+      printWriter.println("</Camera>");
+      printWriter.println("<styleUrl>#" + styleName + "</styleUrl>");
+      printWriter.println("<Icon><href>" + Uri.decode(photoUrl) + "</href></Icon>");
+      printWriter.print("<ViewVolume>");
+      printWriter.print("<near>10</near>");
+      printWriter.print("<leftFov>-60</leftFov>");
+      printWriter.print("<rightFov>60</rightFov>");
+      printWriter.print("<bottomFov>-45</bottomFov>");
+      printWriter.print("<topFov>45</topFov>");
+      printWriter.println("</ViewVolume>");
+      printWriter.println("<Point>");
+      printWriter.println("<coordinates>" + getCoordinates(location, ",") + "</coordinates>");
+      printWriter.println("</Point>");
+      printWriter.println("</PhotoOverlay>");
+    }
+  }
+
+  /**
+   * Gets the heading to a location.
+   * 
+   * @param trackId the track id containing the location
+   * @param location the location
+   */
+  private float getHeading(long trackId, Location location) {
+    long trackPointId = myTracksProviderUtils.getTrackPointId(trackId, location);
+    if (trackPointId == -1L) {
+      return location.getBearing();
+    }
+    Cursor cursor = null;
+    Location viewLocation;
+    try {
+      cursor = myTracksProviderUtils.getTrackPointCursor(trackId, trackPointId, 10, true);
+      if (cursor == null || cursor.getCount() == 0) {
+        return location.getBearing();
+      }
+      cursor.moveToPosition(cursor.getCount() - 1);
+      viewLocation = myTracksProviderUtils.createTrackPoint(cursor);
+    } finally {
+      if (cursor != null) {
+        cursor.close();
+      }
+    }  
+    return viewLocation.bearingTo(location);
+  }
+  
   private String getCoordinates(Location location, String separator) {
     StringBuffer buffer = new StringBuffer();
     buffer.append(location.getLongitude() + separator + location.getLatitude());

MyTracks/src/com/google/android/apps/mytracks/util/ListItemUtils.java

@@ -109,7 +109,8 @@ public class ListItemUtils {
 
     // Set category/description
     TextView descriptionTextView = (TextView) view.findViewById(R.id.list_item_description);
-    setTextView(descriptionTextView, getDescription(isRecording, category, description));
+    setTextView(descriptionTextView,
+        isRecording ? null : StringUtils.getCategoryDescription(category, description));
   }
 
   /**
@@ -146,30 +147,6 @@ public class ListItemUtils {
     return buffer.toString();
   }
 
-  /**
-   * Gets the description text.
-   * 
-   * @param isRecording true if recording
-   * @param category the category
-   * @param description the description
-   */
-  private static String getDescription(boolean isRecording, String category, String description) {
-    if (isRecording) {
-      return null;
-    }
-    if (category == null || category.length() == 0) {
-      return description;
-    }
-
-    StringBuffer buffer = new StringBuffer();
-
-    buffer.append("[" + category + "]");
-    if (description != null && description.length() != 0) {
-      buffer.append(" " + description);
-    }
-    return buffer.toString();
-  }
-
   /**
    * Gets the start time text.
    * 

MyTracks/src/com/google/android/apps/mytracks/util/StringUtils.java

@@ -228,6 +228,26 @@ public class StringUtils {
     return result;
   }
 
+  /**
+   * Gets a string for category and description.
+   * 
+   * @param category the category
+   * @param description the description
+   */
+  public static String getCategoryDescription(String category, String description) {
+    if (category == null || category.length() == 0) {
+      return description;
+    }
+
+    StringBuffer buffer = new StringBuffer();
+
+    buffer.append("[" + category + "]");
+    if (description != null && description.length() != 0) {
+      buffer.append(" " + description);
+    }
+    return buffer.toString();
+  }
+  
   /**
    * Formats the given text as a XML CDATA element. This includes adding the
    * starting and ending CDATA tags. Please notice that this may result in

MyTracksLib/src/com/google/android/apps/mytracks/content/MyTracksProviderUtils.java

@@ -237,6 +237,15 @@ public interface MyTracksProviderUtils {
    */
   public long getLastTrackPointId(long trackId);
 
+  /**
+   * Gets the track point id of a location.
+   * 
+   * @param trackId the track id
+   * @param location the location
+   * @return track point id if the location is in the track. -1L otherwise.
+   */
+  public long getTrackPointId(long trackId, Location location);
+  
   /**
    * Gets the first valid location for a track. Returns null if it doesn't
    * exist.

MyTracksLib/src/com/google/android/apps/mytracks/content/MyTracksProviderUtilsImpl.java

@@ -789,6 +789,31 @@ public class MyTracksProviderUtilsImpl implements MyTracksProviderUtils {
     return -1L;
   }
   
+  @Override
+  public long getTrackPointId(long trackId, Location location) {
+    if (trackId < 0) {
+      return -1L;
+    }
+    Cursor cursor = null;
+    try {
+      String selection = TrackPointsColumns._ID + "=(select max(" + TrackPointsColumns._ID
+          + ") from " + TrackPointsColumns.TABLE_NAME + " WHERE " + TrackPointsColumns.TRACKID
+          + "=? AND " + TrackPointsColumns.TIME + "=?)";
+      String[] selectionArgs = new String[] {
+          Long.toString(trackId), Long.toString(location.getTime()) };
+      cursor = getTrackPointCursor(new String[] { TrackPointsColumns._ID }, selection,
+          selectionArgs, TrackPointsColumns._ID);
+      if (cursor != null && cursor.moveToFirst()) {
+        return cursor.getLong(cursor.getColumnIndexOrThrow(TrackPointsColumns._ID));
+      }
+    } finally {
+      if (cursor != null) {
+        cursor.close();
+      }
+    }
+    return -1L;
+  }
+
   @Override
   public Location getFirstValidTrackPoint(long trackId) {
     if (trackId < 0) {