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Commit bf0adf3b authored by Diego Perez's avatar Diego Perez Committed by Android (Google) Code Review
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Merge "More layoutlib delegate native methods to do text rendering."

parents 6a38e43b 6386b8da

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

+57 −6
Original line number Diff line number Diff line
@@ -4,10 +4,15 @@ import com.android.annotations.NonNull; 
import com.android.layoutlib.bridge.impl.DelegateManager;

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



import android.graphics.BidiRenderer;

import android.graphics.Paint;

import android.graphics.Paint_Delegate;

import android.graphics.RectF;

import android.text.StaticLayout.LineBreaks;

import android.text.Primitive.PrimitiveType;



import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;



import com.ibm.icu.text.BreakIterator;
@@ -33,7 +38,7 @@ public class StaticLayout_Delegate { 
        new DelegateManager<Builder>(Builder.class);



    @LayoutlibDelegate

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

    /*package*/ static int nComputeLineBreaks(long nativeBuilder,

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

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

            int[] recycleBreaks, float[] recycleWidths, boolean[] recycleFlags, int recycleLength) {
@@ -41,7 +46,7 @@ public class StaticLayout_Delegate { 
        Builder builder = sBuilderManager.getDelegate(nativeBuilder);

        // compute all possible breakpoints.

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

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

        it.setText(new Segment(builder.mText, 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));

        int loc;
@@ -52,7 +57,7 @@ public class StaticLayout_Delegate { 


        LineWidth lineWidth = new LineWidth(firstWidth, firstWidthLineCount, restWidth);

        TabStops tabStopCalculator = new TabStops(variableTabStops, defaultTabStop);

        List<Primitive> primitives = computePrimitives(inputText, widths, length, breaks);

        List<Primitive> primitives = computePrimitives(builder.mText, builder.mWidths, length, breaks);

        LineBreaker lineBreaker;

        if (optimize) {

            lineBreaker = new OptimizingLineBreaker(primitives, lineWidth, tabStopCalculator);
@@ -119,16 +124,62 @@ public class StaticLayout_Delegate { 
    }



    @LayoutlibDelegate

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

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

        Builder builder = sBuilderManager.getDelegate(nativeBuilder);

        builder.mLocale = locale;

    }



    @LayoutlibDelegate

    /*package*/ static void nSetText(long nativeBuilder, char[] text, int length) {

        Builder builder = sBuilderManager.getDelegate(nativeBuilder);

        builder.mText = text;

        builder.mWidths = new float[length];

    }





    @LayoutlibDelegate

    /*package*/ static float nAddStyleRun(long nativeBuilder, long nativePaint, long nativeTypeface,

            int start, int end, boolean isRtl) {

        Builder builder = sBuilderManager.getDelegate(nativeBuilder);



        int bidiFlags = isRtl ? Paint.BIDI_FORCE_RTL : Paint.BIDI_FORCE_LTR;

        return measureText(nativePaint, builder.mText, start, end - start, builder.mWidths, bidiFlags);

    }





    @LayoutlibDelegate

    /*package*/ static void nAddMeasuredRun(long nativeBuilder, int start, int end, float[] widths) {

        Builder builder = sBuilderManager.getDelegate(nativeBuilder);

        System.arraycopy(widths, start, builder.mWidths, start, end - start);

    }



    @LayoutlibDelegate

    /*package*/ static void nAddReplacementRun(long nativeBuilder, int start, int end, float width) {

        Builder builder = sBuilderManager.getDelegate(nativeBuilder);

        builder.mWidths[start] = width;

        Arrays.fill(builder.mWidths, start + 1, end, 0.0f);

    }



    @LayoutlibDelegate

    /*package*/ static void nGetWidths(long nativeBuilder, float[] floatsArray) {

        Builder builder = sBuilderManager.getDelegate(nativeBuilder);

        System.arraycopy(builder.mWidths, 0, floatsArray, 0, builder.mWidths.length);

    }



    private static float measureText(long nativePaint, char []text, int index, int count,

            float[] widths, int bidiFlags) {

        Paint_Delegate paint = Paint_Delegate.getDelegate(nativePaint);

        RectF bounds = new BidiRenderer(null, paint, text)

            .renderText(index, index + count, bidiFlags, widths, 0, false);

        return bounds.right - bounds.left;

    }



    /**

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

     * set by nBuilderSetLocale.

     * Java representation of the native Builder class.

     */

    static class Builder {

        String mLocale;

        char[] mText;

        float[] mWidths;

    }

}