Remove nSetLocales

nSetLocales needed to be done at the same time of addStyleRun.
So it is natural to be the arguments of addStyleRun.

Since locale change detection take longer time in native, check it
in Java and pass null if not changed.

Here is an example of StaticLayoutPerfTestResult.
Before (median):
 createRandom: 3,422,247
 createRandom(breakBalanced): 3,448,865
 create: 183,642

After:
 createRandom: 3,493,079
 createRandom(breakBalanced): 3,495,381
 create: 193,363

Test: bit CtsWidgetTestCases:android.widget.cts.TextViewTest
Test: bit CtsTextTestCases:android.text.cts.DynamicLayoutTest
Test: bit CtsTextTestCases:android.text.cts.StaticLayoutTest
Test: minikin_tests
Bug: 65175766
Bug: 65024629
Change-Id: I4586cef626f631d4736b0db59ba9f3f6abd3d4ff

1 files changed, 20 insertions, 16 deletions

diff --git a/core/java/android/text/StaticLayout.java b/core/java/android/text/StaticLayout.java
index 3303b54e462b..77e381a2d828 100644
--- a/core/java/android/text/StaticLayout.java
+++ b/core/java/android/text/StaticLayout.java
@@ -101,6 +101,7 @@ public class StaticLayout extends Layout {
             b.mBreakStrategy = Layout.BREAK_STRATEGY_SIMPLE;
             b.mHyphenationFrequency = Layout.HYPHENATION_FREQUENCY_NONE;
             b.mJustificationMode = Layout.JUSTIFICATION_MODE_NONE;
+            b.mLocales = null;
 
             b.mMeasuredText = MeasuredText.obtain();
             return b;
@@ -117,6 +118,7 @@ public class StaticLayout extends Layout {
             b.mMeasuredText = null;
             b.mLeftIndents = null;
             b.mRightIndents = null;
+            b.mLocales = null;
             nFinishBuilder(b.mNativePtr);
             sPool.release(b);
         }
@@ -401,7 +403,6 @@ public class StaticLayout extends Layout {
          * future).
          *
          * Then, for each run within the paragraph:
-         *  - setLocales (this must be done at least for the first run, optional afterwards)
          *  - one of the following, depending on the type of run:
          *    + addStyleRun (a text run, to be measured in native code)
          *    + addMeasuredRun (a run already measured in Java, passed into native code)
@@ -413,16 +414,21 @@ public class StaticLayout extends Layout {
          * After all paragraphs, call finish() to release expensive buffers.
          */
 
-        private void setLocales(LocaleList locales) {
+        /* package */ float addStyleRun(TextPaint paint, int start, int end, boolean isRtl) {
+            final LocaleList locales = paint.getTextLocales();
+            final String languageTags;
+            long[] hyphenators;
             if (!locales.equals(mLocales)) {
-                nSetLocales(mNativePtr, locales.toLanguageTags(), getHyphenators(locales));
-                mLocales = locales;
+                languageTags = locales.toLanguageTags();
+                hyphenators = getHyphenators(locales);
+            } else {
+                // passing null means keep current locale.
+                // TODO: move locale change detection to native.
+                languageTags = null;
+                hyphenators = null;
             }
-        }
-
-        /* package */ float addStyleRun(TextPaint paint, int start, int end, boolean isRtl) {
-            setLocales(paint.getTextLocales());
-            return nAddStyleRun(mNativePtr, paint.getNativeInstance(), start, end, isRtl);
+            return nAddStyleRun(mNativePtr, paint.getNativeInstance(), start, end, isRtl,
+                    languageTags, hyphenators);
         }
 
         /* package */ void addMeasuredRun(int start, int end, float[] widths) {
@@ -662,7 +668,6 @@ public class StaticLayout extends Layout {
         // store fontMetrics per span range
         // must be a multiple of 4 (and > 0) (store top, bottom, ascent, and descent per range)
         int[] fmCache = new int[4 * 4];
-        b.setLocales(paint.getTextLocales());
 
         mLineCount = 0;
         mEllipsized = false;
@@ -1494,20 +1499,19 @@ public class StaticLayout extends Layout {
     /* package */ static native long nLoadHyphenator(ByteBuffer buf, int offset,
             int minPrefix, int minSuffix);
 
-    private static native void nSetLocales(long nativePtr, String locales,
-            long[] nativeHyphenators);
-
     // Set up paragraph text and settings; done as one big method to minimize jni crossings
     private static native void nSetupParagraph(
-            @NonNull long nativePtr, @NonNull char[] text, @IntRange(from = 0) int length,
+            /* non zero */ long nativePtr, @NonNull char[] text, @IntRange(from = 0) int length,
             @FloatRange(from = 0.0f) float firstWidth, @IntRange(from = 0) int firstWidthLineCount,
             @FloatRange(from = 0.0f) float restWidth, @Nullable int[] variableTabStops,
             int defaultTabStop, @BreakStrategy int breakStrategy,
             @HyphenationFrequency int hyphenationFrequency, boolean isJustified,
             @Nullable int[] indents, @IntRange(from = 0) int indentsOffset);
 
-    private static native float nAddStyleRun(long nativePtr, long nativePaint, int start, int end,
-            boolean isRtl);
+    private static native float nAddStyleRun(
+            /* non zero */ long nativePtr, /* non zero */ long nativePaint,
+            @IntRange(from = 0) int start, @IntRange(from = 0) int end, boolean isRtl,
+            @Nullable String languageTags, @Nullable long[] hyphenators);
 
     private static native void nAddMeasuredRun(long nativePtr,
             int start, int end, float[] widths);