[Omnibox] When in keyword mode, don't allow shortcut matches of different...

[Omnibox] When in keyword mode, don't allow shortcut matches of different keywords to be the default match.

Prior to this cl, when the user has searched for `searchProvder searchTerm` (not in keyword mode) then typing in `searchProvider `, entering keyword mode, and typing `s` could result in the shortcut match for the earlier search becoming the default match and causing him to leave keyword mode.

Bug: 632215
Change-Id: I19ee38e3e5c9ee68f8f7703afccef1276027b521
Reviewed-on: https://chromium-review.googlesource.com/c/1182295
Commit-Queue: manuk hovanesian <manukh@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#597202}

chrome/browser/autocomplete/shortcuts_provider_extension_unittest.cc

@@ -41,7 +41,7 @@ struct TestShortcutData shortcut_test_db[] = {
     {"BD85DBA2-8C29-49F9-84AE-48E1E90880F1", "echo echo", "echo echo",
      "chrome-extension://cedabbhfglmiikkmdgcpjdkocfcmbkee/?q=echo",
      "Run Echo command: echo", "0,0", "Echo", "0,4", ui::PAGE_TRANSITION_TYPED,
-     AutocompleteMatchType::EXTENSION_APP_DEPRECATED, "echo", 1, 1},
+     AutocompleteMatchType::EXTENSION_APP_DEPRECATED, "", 1, 1},
 };
 
 }  // namespace

components/omnibox/browser/shortcuts_provider.cc

@@ -17,6 +17,7 @@
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
+#include "base/strings/strcat.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ -388,15 +389,31 @@ AutocompleteMatch ShortcutsProvider::ShortcutToACMatch(
                              base::UTF16ToUTF8(shortcut.text));
 
   // Set |inline_autocompletion| and |allowed_to_be_default_match| if possible.
-  // If the match is a search query this is easy: simply check whether the
-  // user text is a prefix of the query.  If the match is a navigation, we
-  // assume the fill_into_edit looks something like a URL, so we use
-  // URLPrefix::GetInlineAutocompleteOffset() to try and strip off any prefixes
-  // that the user might not think would change the meaning, but would
-  // otherwise prevent inline autocompletion.  This allows, for example, the
-  // input of "foo.c" to autocomplete to "foo.com" for a fill_into_edit of
-  // "http://foo.com".
+  // If the input is in keyword mode, navigation matches cannot be the default
+  // match, and search query matches can only be the default match if their
+  // keywords matches the input's keyword, as otherwise, default,
+  // different-keyword matches may result in leaving keyword mode. Additionally,
+  // if the match is a search query, check whether the user text is a prefix of
+  // the query. If the match is a navigation, we assume the fill_into_edit looks
+  // something like a URL, so we use URLPrefix::GetInlineAutocompleteOffset() to
+  // try and strip off any prefixes that the user might not think would change
+  // the meaning, but would otherwise prevent inline autocompletion. This
+  // allows, for example, the input of "foo.c" to autocomplete to "foo.com" for
+  // a fill_into_edit of "http://foo.com".
   const bool is_search_type = AutocompleteMatch::IsSearchType(match.type);
+
+  DCHECK(is_search_type != match.keyword.empty());
+
+  // True if input is in keyword mode and the match is a URL suggestion or the
+  // match has a different keyword.
+  bool would_cause_leaving_keyboard_mode =
+      input.prefer_keyword() &&
+      (!is_search_type ||
+       !base::StartsWith(base::UTF16ToUTF8(input.text()),
+                         base::StrCat({base::UTF16ToUTF8(match.keyword), " "}),
+                         base::CompareCase::INSENSITIVE_ASCII));
+
+  if (!would_cause_leaving_keyboard_mode) {
     if (is_search_type) {
       if (match.fill_into_edit.size() >= input.text().size() &&
           std::equal(match.fill_into_edit.begin(),
@@ -421,6 +438,7 @@ AutocompleteMatch ShortcutsProvider::ShortcutToACMatch(
             match.inline_autocompletion.empty();
       }
     }
+  }
 
   // Try to mark pieces of the contents and description as matches if they
   // appear in |input.text()|.