Always consider a new line the start of a sentence

Bug: 7282523
Change-Id: I10a73e99efdfe6acb9a16819694b98c6714fd451

2 files changed, 17 insertions, 5 deletions

diff --git a/java/src/com/android/inputmethod/latin/StringUtils.java b/java/src/com/android/inputmethod/latin/StringUtils.java
index 7b65b7343..df7709892 100644
--- a/java/src/com/android/inputmethod/latin/StringUtils.java
+++ b/java/src/com/android/inputmethod/latin/StringUtils.java
@@ -250,15 +250,19 @@ public final class StringUtils {
 
         // Step 3 : Search for the start of a paragraph. From the starting point computed in step 2,
         // we go back over any space or tab char sitting there. We find the start of a paragraph
-        // if the first char that's not a space or tab is a start of line (as in, either \n or
-        // start of text).
+        // if the first char that's not a space or tab is a start of line (as in \n, start of text,
+        // or some other similar characters).
         int j = i;
+        char prevChar = Keyboard.CODE_SPACE;
         if (hasSpaceBefore) --j;
-        while (j > 0 && Character.isWhitespace(cs.charAt(j - 1))) {
+        while (j > 0) {
+            prevChar = cs.charAt(j - 1);
+            if (!Character.isSpaceChar(prevChar) && prevChar != Keyboard.CODE_TAB) break;
             j--;
         }
-        if (j == 0) {
-            // There is only whitespace between the start of the text and the cursor. Both
+        if (j <= 0 || Character.isWhitespace(prevChar)) {
+            // There are only spacing chars between the start of the paragraph and the cursor,
+            // defined as a isWhitespace() char that is neither a isSpaceChar() nor a tab. Both
             // MODE_WORDS and MODE_SENTENCES should be active.
             return (TextUtils.CAP_MODE_CHARACTERS | TextUtils.CAP_MODE_WORDS
                     | TextUtils.CAP_MODE_SENTENCES) & reqModes;
diff --git a/tests/src/com/android/inputmethod/latin/StringUtilsTests.java b/tests/src/com/android/inputmethod/latin/StringUtilsTests.java
index be3494dc7..3142bd602 100644
--- a/tests/src/com/android/inputmethod/latin/StringUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/StringUtilsTests.java
@@ -140,6 +140,14 @@ public class StringUtilsTests extends AndroidTestCase {
         allPathsForCaps("Word", c | w, l, true);
         allPathsForCaps("Word.", c | w | s, l, true);
 
+        // Tests after some whitespace
+        allPathsForCaps("Word\n", c | w | s, l, false);
+        allPathsForCaps("Word\n", c | w | s, l, true);
+        allPathsForCaps("Word\n ", c | w | s, l, true);
+        allPathsForCaps("Word.\n", c | w | s, l, false);
+        allPathsForCaps("Word.\n", c | w | s, l, true);
+        allPathsForCaps("Word.\n ", c | w | s, l, true);
+
         l = Locale.FRENCH;
         allPathsForCaps("\"Word.\" ", c | w, l, false);
         allPathsForCaps("\"Word\". ", c | w | s, l, false);