Add API for obtaining changing configurations bitmask from Theme

Required to know when to reload the system context's theme in response
to configuration changes, and thus needed to support the DayNight theme.

Bug: 20267825
Change-Id: I7df5e28b7a6d8b611ea030032544cf4800788514

1 files changed, 10 insertions, 0 deletions

diff --git a/libs/androidfw/ResourceTypes.cpp b/libs/androidfw/ResourceTypes.cpp
index 04ebe70..19a5beb 100644
--- a/libs/androidfw/ResourceTypes.cpp
+++ b/libs/androidfw/ResourceTypes.cpp
@@ -3147,6 +3147,7 @@ struct ResTable::bag_set
 
 ResTable::Theme::Theme(const ResTable& table)
     : mTable(table)
+    , mTypeSpecFlags(0)
 {
     memset(mPackages, 0, sizeof(mPackages));
 }
@@ -3205,6 +3206,8 @@ status_t ResTable::Theme::applyStyle(uint32_t resID, bool force)
         return N;
     }
 
+    mTypeSpecFlags |= bagTypeSpecFlags;
+
     uint32_t curPackage = 0xffffffff;
     ssize_t curPackageIndex = 0;
     package_info* curPI = NULL;
@@ -3323,6 +3326,8 @@ status_t ResTable::Theme::setTo(const Theme& other)
         }
     }
 
+    mTypeSpecFlags = other.mTypeSpecFlags;
+
     if (kDebugTableTheme) {
         ALOGI("Final theme:");
         dumpToLog();
@@ -3417,6 +3422,11 @@ ssize_t ResTable::Theme::resolveAttributeReference(Res_value* inOutValue,
             inoutTypeSpecFlags, inoutConfig);
 }
 
+uint32_t ResTable::Theme::getChangingConfigurations() const
+{
+    return mTypeSpecFlags;
+}
+
 void ResTable::Theme::dumpToLog() const
 {
     ALOGI("Theme %p:\n", this);