fix #1996: Translate is opening browser instead of translate app

3 files changed, 93 insertions, 5 deletions

diff --git a/main/src/cgeo/geocaching/utils/HtmlUtils.java b/main/src/cgeo/geocaching/utils/HtmlUtils.java
new file mode 100644
index 0000000..a54ba57
--- /dev/null
+++ b/main/src/cgeo/geocaching/utils/HtmlUtils.java
@@ -0,0 +1,56 @@
+package cgeo.geocaching.utils;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.tuple.Pair;
+
+import android.text.Spanned;
+import android.text.style.ImageSpan;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+
+public class HtmlUtils {
+
+    /**
+     * Extract the text from a HTML based string. This is similar to what HTML.fromHtml(...) does, but this method also
+     * removes the embedded images instead of replacing them by a small rectangular representation character.
+     *
+     * @param html
+     * @return
+     */
+    public static String extractText(CharSequence html) {
+        String result = html.toString();
+
+        // recognize images in textview HTML contents
+        if (html instanceof Spanned) {
+            Spanned text = (Spanned) html;
+            Object[] styles = text.getSpans(0, text.length(), Object.class);
+            ArrayList<Pair<Integer, Integer>> removals = new ArrayList<Pair<Integer, Integer>>();
+            for (Object style : styles) {
+                if (style instanceof ImageSpan) {
+                    int start = text.getSpanStart(style);
+                    int end = text.getSpanEnd(style);
+                    removals.add(Pair.of(start, end));
+                }
+            }
+
+            // sort reversed and delete image spans
+            Collections.sort(removals, new Comparator<Pair<Integer, Integer>>() {
+
+                @Override
+                public int compare(Pair<Integer, Integer> lhs, Pair<Integer, Integer> rhs) {
+                    return rhs.getRight().compareTo(lhs.getRight());
+                }
+            });
+            result = text.toString();
+            for (Pair<Integer, Integer> removal : removals) {
+                result = result.substring(0, removal.getLeft()) + result.substring(removal.getRight());
+            }
+        }
+
+        // some line breaks are still in the text, source is unknown
+        return StringUtils.replace(result, "<br />", "\n").trim();
+    }
+
+}
diff --git a/main/src/cgeo/geocaching/utils/ProcessUtils.java b/main/src/cgeo/geocaching/utils/ProcessUtils.java
new file mode 100644
index 0000000..53991fb
--- /dev/null
+++ b/main/src/cgeo/geocaching/utils/ProcessUtils.java
@@ -0,0 +1,27 @@
+package cgeo.geocaching.utils;
+
+import cgeo.geocaching.cgeoapplication;
+
+import android.content.Intent;
+import android.content.pm.PackageManager;
+
+public class ProcessUtils {
+
+    public static boolean isInstalled(final String packageName) {
+        return getLaunchIntent(packageName) != null;
+    }
+
+    public static Intent getLaunchIntent(final String packageName) {
+        if (packageName == null) {
+            return null;
+        }
+        final PackageManager packageManager = cgeoapplication.getInstance().getPackageManager();
+        try {
+            // This can throw an exception where the exception type is only defined on API Level > 3
+            // therefore surround with try-catch
+            return packageManager.getLaunchIntentForPackage(packageName);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+}
diff --git a/main/src/cgeo/geocaching/utils/TranslationUtils.java b/main/src/cgeo/geocaching/utils/TranslationUtils.java
index 0066d8e..a29c5a7 100644
--- a/main/src/cgeo/geocaching/utils/TranslationUtils.java
+++ b/main/src/cgeo/geocaching/utils/TranslationUtils.java
@@ -4,7 +4,6 @@ import cgeo.geocaching.activity.AbstractActivity;
 
 import android.content.Intent;
 import android.net.Uri;
-import android.text.Html;
 
 import java.net.URLEncoder;
 
@@ -16,9 +15,10 @@ public final class TranslationUtils {
     private static final String translationWebsite = "http://translate.google.com/";
     private static final String translationForceClassicMode = "?vi=c";
     private static final String translationAutoSelect = "#auto";
-    private static final String translationFieldSeparator = "/";
+    private static final String translationFieldSeparator = "|";
 
     public static final int translationTextLengthToWarn = 500;
+    private static final String TRANSLATION_APP = "com.google.android.apps.translate";
 
     /**
      * Build a URI for Google Translate
@@ -29,13 +29,18 @@ public final class TranslationUtils {
      *            The text to be translated
      * @return URI ready to be parsed
      */
-    public static String buildTranslationURI(final String toLang, final String text) {
-        return translationWebsite + translationForceClassicMode + translationAutoSelect + translationFieldSeparator + toLang + translationFieldSeparator + URLEncoder.encode(Html.fromHtml(text).toString());
+    private static String buildTranslationURI(final String toLang, final String text) {
+        String content = URLEncoder.encode(text);
+        // the app works better without the "+", the website works better with "+", therefore assume using the app if installed
+        if (ProcessUtils.isInstalled(TRANSLATION_APP)) {
+            content = content.replace("+", "%20");
+        }
+        return translationWebsite + translationForceClassicMode + translationAutoSelect + translationFieldSeparator + toLang + translationFieldSeparator + content;
     }
 
     /**
      * Send Intent for Google Translate. Can be caught by Google Translate App or browser
-     * 
+     *
      * @param toLang
      *            The two-letter lowercase ISO language codes as defined by ISO 639-1
      * @param text