Change default value of setElegantTextFlag

As a first step of deprecating UI fonts, make setElegantTextFlag as true
by default if the target SDK is set to Android 15 or later..

Bug: 279646685
Test: atest PaintDefaultsTest
Change-Id: If8e40c075122cafd2f89ae703bf6a5f07ebc7bd0
diff --git a/libs/hwui/FeatureFlags.h b/libs/hwui/FeatureFlags.h
index ffb329d..00d049c 100644
--- a/libs/hwui/FeatureFlags.h
+++ b/libs/hwui/FeatureFlags.h
@@ -33,6 +33,14 @@
 #endif  // __ANDROID__
 }
 
+inline bool deprecate_ui_fonts() {
+#ifdef __ANDROID__
+    return com_android_text_flags_deprecate_ui_fonts();
+#else
+    return true;
+#endif  // __ANDROID__
+}
+
 }  // namespace text_feature
 
 }  // namespace android
diff --git a/libs/hwui/hwui/MinikinUtils.cpp b/libs/hwui/hwui/MinikinUtils.cpp
index bcfb4c8..7552b56d 100644
--- a/libs/hwui/hwui/MinikinUtils.cpp
+++ b/libs/hwui/hwui/MinikinUtils.cpp
@@ -16,12 +16,15 @@
 
 #include "MinikinUtils.h"
 
-#include <string>
-
 #include <log/log.h>
-
+#include <minikin/FamilyVariant.h>
 #include <minikin/MeasuredText.h>
 #include <minikin/Measurement.h>
+
+#include <optional>
+#include <string>
+
+#include "FeatureFlags.h"
 #include "Paint.h"
 #include "SkPathMeasure.h"
 #include "Typeface.h"
@@ -43,9 +46,17 @@
     minikinPaint.wordSpacing = paint->getWordSpacing();
     minikinPaint.fontFlags = MinikinFontSkia::packFontFlags(font);
     minikinPaint.localeListId = paint->getMinikinLocaleListId();
-    minikinPaint.familyVariant = paint->getFamilyVariant();
     minikinPaint.fontStyle = resolvedFace->fStyle;
     minikinPaint.fontFeatureSettings = paint->getFontFeatureSettings();
+
+    const std::optional<minikin::FamilyVariant>& familyVariant = paint->getFamilyVariant();
+    if (familyVariant.has_value()) {
+        minikinPaint.familyVariant = familyVariant.value();
+    } else {
+        minikinPaint.familyVariant = text_feature::deprecate_ui_fonts()
+                                             ? minikin::FamilyVariant::ELEGANT
+                                             : minikin::FamilyVariant::DEFAULT;
+    }
     return minikinPaint;
 }
 
diff --git a/libs/hwui/hwui/Paint.h b/libs/hwui/hwui/Paint.h
index 4a8f3e1..caffdfc 100644
--- a/libs/hwui/hwui/Paint.h
+++ b/libs/hwui/hwui/Paint.h
@@ -94,9 +94,10 @@
 
     uint32_t getMinikinLocaleListId() const { return mMinikinLocaleListId; }
 
+    void resetFamilyVariant() { mFamilyVariant.reset(); }
     void setFamilyVariant(minikin::FamilyVariant variant) { mFamilyVariant = variant; }
 
-    minikin::FamilyVariant getFamilyVariant() const { return mFamilyVariant; }
+    std::optional<minikin::FamilyVariant> getFamilyVariant() const { return mFamilyVariant; }
 
     void setStartHyphenEdit(uint32_t startHyphen) {
         mHyphenEdit = minikin::packHyphenEdit(
@@ -171,7 +172,7 @@
     float mWordSpacing = 0;
     std::string mFontFeatureSettings;
     uint32_t mMinikinLocaleListId;
-    minikin::FamilyVariant mFamilyVariant;
+    std::optional<minikin::FamilyVariant> mFamilyVariant;
     uint32_t mHyphenEdit = 0;
     // The native Typeface object has the same lifetime of the Java Typeface
     // object. The Java Paint object holds a strong reference to the Java Typeface
diff --git a/libs/hwui/jni/Paint.cpp b/libs/hwui/jni/Paint.cpp
index 1463945..8c71d6f 100644
--- a/libs/hwui/jni/Paint.cpp
+++ b/libs/hwui/jni/Paint.cpp
@@ -935,15 +935,39 @@
         obj->setMinikinLocaleListId(minikinLocaleListId);
     }
 
-    static jboolean isElegantTextHeight(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+    // Note: Following three values must be equal to the ones in Java file: Paint.java.
+    constexpr jint ELEGANT_TEXT_HEIGHT_UNSET = -1;
+    constexpr jint ELEGANT_TEXT_HEIGHT_ENABLED = 0;
+    constexpr jint ELEGANT_TEXT_HEIGHT_DISABLED = 1;
+
+    static jint getElegantTextHeight(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
         Paint* obj = reinterpret_cast<Paint*>(paintHandle);
-        return obj->getFamilyVariant() == minikin::FamilyVariant::ELEGANT;
+        const std::optional<minikin::FamilyVariant>& familyVariant = obj->getFamilyVariant();
+        if (familyVariant.has_value()) {
+            if (familyVariant.value() == minikin::FamilyVariant::ELEGANT) {
+                return ELEGANT_TEXT_HEIGHT_ENABLED;
+            } else {
+                return ELEGANT_TEXT_HEIGHT_DISABLED;
+            }
+        } else {
+            return ELEGANT_TEXT_HEIGHT_UNSET;
+        }
     }
 
-    static void setElegantTextHeight(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean aa) {
+    static void setElegantTextHeight(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint value) {
         Paint* obj = reinterpret_cast<Paint*>(paintHandle);
-        obj->setFamilyVariant(
-                aa ? minikin::FamilyVariant::ELEGANT : minikin::FamilyVariant::DEFAULT);
+        switch (value) {
+            case ELEGANT_TEXT_HEIGHT_ENABLED:
+                obj->setFamilyVariant(minikin::FamilyVariant::ELEGANT);
+                return;
+            case ELEGANT_TEXT_HEIGHT_DISABLED:
+                obj->setFamilyVariant(minikin::FamilyVariant::DEFAULT);
+                return;
+            case ELEGANT_TEXT_HEIGHT_UNSET:
+            default:
+                obj->resetFamilyVariant();
+                return;
+        }
     }
 
     static jfloat getTextSize(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
@@ -1178,8 +1202,8 @@
         {"nSetTextAlign", "(JI)V", (void*)PaintGlue::setTextAlign},
         {"nSetTextLocalesByMinikinLocaleListId", "(JI)V",
          (void*)PaintGlue::setTextLocalesByMinikinLocaleListId},
-        {"nIsElegantTextHeight", "(J)Z", (void*)PaintGlue::isElegantTextHeight},
-        {"nSetElegantTextHeight", "(JZ)V", (void*)PaintGlue::setElegantTextHeight},
+        {"nGetElegantTextHeight", "(J)I", (void*)PaintGlue::getElegantTextHeight},
+        {"nSetElegantTextHeight", "(JI)V", (void*)PaintGlue::setElegantTextHeight},
         {"nGetTextSize", "(J)F", (void*)PaintGlue::getTextSize},
         {"nSetTextSize", "(JF)V", (void*)PaintGlue::setTextSize},
         {"nGetTextScaleX", "(J)F", (void*)PaintGlue::getTextScaleX},