[orca] Preface the page summary with "Page has"

[Joanmarie Diggs <joanied src gnome org>]

commit 837d87e28dd5f37ca997b1822fb9dbf7a671f3b0
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Mon Feb 15 01:48:54 2016 -0500

    Preface the page summary with "Page has"

 src/orca/messages.py                     |    7 +++++++
 src/orca/scripts/web/script_utilities.py |    4 +++-
 2 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/messages.py b/src/orca/messages.py
index c7e5f6f..2e9cf80 100644
--- a/src/orca/messages.py
+++ b/src/orca/messages.py
@@ -1554,6 +1554,13 @@ PAGE_LOADING_END = _("Finished loading.")
 # object which has just finished loading (most likely the page's title).
 PAGE_LOADING_END_NAMED = _("Finished loading %s.")
 
+# Translators: When the user loads a new web page, they can optionally have Orca
+# automatically summarize details about the page, such as the number of elements
+# (landmarks, forms, links, tables, etc.). The following string precedes the
+# presentation of the summary. The string substitution is a list of items, such
+# as "10 headings, 1 form, 52 links".
+PAGE_SUMMARY_PREFIX = _("Page has %s.")
+
 # Translators: when the user selects (highlights) or unselects text in a
 # document, Orca will speak information about what they have selected or
 # unselected. This message is presented when the user selects from the
diff --git a/src/orca/scripts/web/script_utilities.py b/src/orca/scripts/web/script_utilities.py
index 406283c..622a3a3 100644
--- a/src/orca/scripts/web/script_utilities.py
+++ b/src/orca/scripts/web/script_utilities.py
@@ -2906,8 +2906,10 @@ class Utilities(script_utilities.Utilities):
         result.append(messages.visitedLinkCount(counts.get('visitedLinks', 0), onlyIfFound))
         result.append(messages.unvisitedLinkCount(counts.get('unvisitedLinks', 0), onlyIfFound))
         result = filter(lambda x: x, result)
+        if not result:
+            return ""
 
-        return ", ".join(result)
+        return messages.PAGE_SUMMARY_PREFIX % ", ".join(result)
 
     def _getCtrlShiftSelectionsStrings(self):
         """Hacky and to-be-obsoleted method."""