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Merge "More layoutlib delegate native methods to do text rendering."

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This commit is contained in:
Diego Perez
2015-03-26 15:35:08 +00:00
committed by Android (Google) Code Review
parent 6a38e43b8b 6386b8dae7
commit bf0adf3ba8
1 changed files with 57 additions and 6 deletions
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63
tools/layoutlib/bridge/src/android/text/StaticLayout_Delegate.java
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@@ -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;
}
}