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Commit fe12aa77 authored by Diego Perez's avatar Diego Perez
Browse files

Add support for the new native Builder class on StaticLayout. 

This patch updates StaticLayout_Delegate to support the new Builder
class introduced in ag/646289.

Change-Id: I9f8c528b8751ce69482e33ac6f1bc42406a0b606
parent 7f602b75

tools/layoutlib/bridge/src/android/text/StaticLayout_Delegate.java

+36 −2
Original line number Diff line number Diff line 
package android.text;



import com.android.annotations.NonNull;

import com.android.layoutlib.bridge.impl.DelegateManager;

import com.android.tools.layoutlib.annotations.LayoutlibDelegate;



import android.text.StaticLayout.LineBreaks;
@@ -27,14 +28,19 @@ public class StaticLayout_Delegate { 
    private static final char CHAR_NEWLINE   = 0x0A;

    private static final char CHAR_ZWSP      = 0x200B;  // Zero width space.



    // ---- Builder delegate manager ----

    private static final DelegateManager<Builder> sBuilderManager =

        new DelegateManager<Builder>(Builder.class);



    @LayoutlibDelegate

    /*package*/ static int nComputeLineBreaks(String locale, char[] inputText, float[] widths,

    /*package*/ static int nComputeLineBreaks(long nativeBuilder, char[] inputText, float[] widths,

            int length, float firstWidth, int firstWidthLineCount, float restWidth,

            int[] variableTabStops, int defaultTabStop, boolean optimize, LineBreaks recycle,

            int[] recycleBreaks, float[] recycleWidths, boolean[] recycleFlags, int recycleLength) {



        Builder builder = sBuilderManager.getDelegate(nativeBuilder);

        // compute all possible breakpoints.

        BreakIterator it = BreakIterator.getLineInstance(new ULocale(locale));

        BreakIterator it = BreakIterator.getLineInstance(new ULocale(builder.mLocale));

        it.setText(new Segment(inputText, 0, length));

        // average word length in english is 5. So, initialize the possible breaks with a guess.

        List<Integer> breaks = new ArrayList<Integer>((int) Math.ceil(length / 5d));
@@ -97,4 +103,32 @@ public class StaticLayout_Delegate { 
                PrimitiveType.PENALTY.getNewPrimitive(length, 0, -PrimitiveType.PENALTY_INFINITY));

        return primitives;

    }



    @LayoutlibDelegate

    /*package*/ static long nNewBuilder() {

        return sBuilderManager.addNewDelegate(new Builder());

    }



    @LayoutlibDelegate

    /*package*/ static void nFinishBuilder(long nativeBuilder) {

    }



    @LayoutlibDelegate

    /*package*/ static void nFreeBuilder(long nativeBuilder) {

        sBuilderManager.removeJavaReferenceFor(nativeBuilder);

    }



    @LayoutlibDelegate

    /*package*/ static void nBuilderSetLocale(long nativeBuilder, String locale) {

        Builder builder = sBuilderManager.getDelegate(nativeBuilder);

        builder.mLocale = locale;

    }



    /**

     * Java representation of the native Builder class. It currently only stores the locale

     * set by nBuilderSetLocale.

     */

    static class Builder {

        String mLocale;

    }

}