1 files changed, 71 insertions, 0 deletions
diff --git a/main/src/cgeo/geocaching/speech/TextFactory.java b/main/src/cgeo/geocaching/speech/TextFactory.java
new file mode 100644
index 0000000..0e13564
--- /dev/null
+++ b/main/src/cgeo/geocaching/speech/TextFactory.java
@@ -0,0 +1,71 @@
+package cgeo.geocaching.speech;
+
+import cgeo.geocaching.R;
+import cgeo.geocaching.Settings;
+import cgeo.geocaching.cgeoapplication;
+import cgeo.geocaching.geopoint.Geopoint;
+import cgeo.geocaching.geopoint.IConversion;
+import cgeo.geocaching.utils.AngleUtils;
+
+import java.util.Locale;
+
+/**
+ * Creates the output to be read by TTS.
+ *
+ */
+public class TextFactory {
+    public static String getText(Geopoint position, Geopoint target, float direction) {
+        if (position == null || target == null) {
+            return null;
+        }
+        return getDirection(position, target, direction) + ". " + getDistance(position, target);
+    }
+
+    private static String getDistance(Geopoint position, Geopoint target) {
+        float kilometers = position.distanceTo(target);
+
+        if (Settings.isUseMetricUnits()) {
+            if (kilometers >= 5.0) {
+                return getString(R.string.tts_kilometers, String.valueOf(Math.round(kilometers)));
+            }
+            if (kilometers >= 1.0) {
+                String digits = String.format(Locale.getDefault(), "%.1f", kilometers);
+                return getString(R.string.tts_kilometers, digits);
+            }
+            int meters = (int) (kilometers * 1000.0);
+            if (meters > 50) {
+                return getString(R.string.tts_meters, String.valueOf(Math.round(meters / 10.0) * 10));
+            }
+            return getString(R.string.tts_meters, String.valueOf(meters));
+        }
+
+        float miles = kilometers / IConversion.MILES_TO_KILOMETER;
+        if (miles >= 3.0) {
+            return getString(R.string.tts_miles, String.valueOf(Math.round(miles)));
+        }
+        if (miles >= 0.2) { // approx 1000 ft
+            String digits = String.format(Locale.getDefault(), "%.1f", miles);
+            return getString(R.string.tts_miles, digits);
+        }
+        int feet = (int) (kilometers * 1000.0 * IConversion.METERS_TO_FEET);
+        if (feet > 300) {
+            return getString(R.string.tts_feet, String.valueOf(Math.round(feet / 10.0) * 10));
+        }
+        return getString(R.string.tts_feet, String.valueOf(feet));
+    }
+
+    private static String getString(int resourceId, Object... formatArgs) {
+        return cgeoapplication.getInstance().getString(resourceId, formatArgs);
+    }
+
+    private static String getDirection(Geopoint position, Geopoint target, float direction) {
+        final int bearing = (int) position.bearingTo(target);
+        int degrees = (int) AngleUtils.normalize(bearing - direction);
+
+        int hours = (degrees + 15) / 30;
+        if (hours == 0) {
+            hours = 12;
+        }
+        return getString(R.string.tts_oclock, String.valueOf(hours));
+    }
+}