Add bounding box based text layout APIs. (6e39dafc) · Commits · e / os / android_frameworks_base

core/api/current.txt

+9 −0

Original line number	Diff line number	Diff line
		@@ -17679,6 +17679,7 @@ package android.graphics.text {
		method @NonNull public android.graphics.text.LineBreaker.Builder setHyphenationFrequency(int);
		method @NonNull public android.graphics.text.LineBreaker.Builder setIndents(@Nullable int[]);
		method @NonNull public android.graphics.text.LineBreaker.Builder setJustificationMode(int);
		method @NonNull public android.graphics.text.LineBreaker.Builder setUseBoundsForWidth(boolean);
		}

		public static class LineBreaker.ParagraphConstraints {
		@@ -47302,6 +47303,7 @@ package android.text {

		public static class BoringLayout.Metrics extends android.graphics.Paint.FontMetricsInt {
		ctor public BoringLayout.Metrics();
		method @NonNull public android.graphics.RectF getDrawingBoundingBox();
		field public int width;
		}

		@@ -47343,6 +47345,7 @@ package android.text {
		method @NonNull public android.text.DynamicLayout.Builder setLineBreakConfig(@NonNull android.graphics.text.LineBreakConfig);
		method @NonNull public android.text.DynamicLayout.Builder setLineSpacing(float, @FloatRange(from=0.0) float);
		method @NonNull public android.text.DynamicLayout.Builder setTextDirection(@NonNull android.text.TextDirectionHeuristic);
		method @NonNull public android.text.DynamicLayout.Builder setUseBoundsForWidth(boolean);
		method @NonNull public android.text.DynamicLayout.Builder setUseLineSpacingFromFallbacks(boolean);
		}

		@@ -47485,6 +47488,7 @@ package android.text {

		public abstract class Layout {
		ctor protected Layout(CharSequence, android.text.TextPaint, int, android.text.Layout.Alignment, float, float);
		method @NonNull public android.graphics.RectF computeDrawingBoundingBox();
		method public void draw(android.graphics.Canvas);
		method public void draw(android.graphics.Canvas, android.graphics.Path, android.graphics.Paint, int);
		method public void draw(@NonNull android.graphics.Canvas, @Nullable java.util.List<android.graphics.Path>, @Nullable java.util.List<android.graphics.Paint>, @Nullable android.graphics.Path, @Nullable android.graphics.Paint, int);
		@@ -47546,6 +47550,7 @@ package android.text {
		method @NonNull public final CharSequence getText();
		method @NonNull public final android.text.TextDirectionHeuristic getTextDirectionHeuristic();
		method public abstract int getTopPadding();
		method public boolean getUseBoundsForWidth();
		method @IntRange(from=0) public final int getWidth();
		method public final void increaseWidthTo(int);
		method public boolean isFallbackLineSpacingEnabled();
		@@ -47595,6 +47600,7 @@ package android.text {
		method @NonNull public android.text.Layout.Builder setMaxLines(@IntRange(from=1) int);
		method @NonNull public android.text.Layout.Builder setRightIndents(@Nullable int[]);
		method @NonNull public android.text.Layout.Builder setTextDirectionHeuristic(@NonNull android.text.TextDirectionHeuristic);
		method @NonNull public android.text.Layout.Builder setUseBoundsForWidth(boolean);
		}

		public static class Layout.Directions {
		@@ -47863,6 +47869,7 @@ package android.text {
		method @NonNull public android.text.StaticLayout.Builder setMaxLines(@IntRange(from=0) int);
		method public android.text.StaticLayout.Builder setText(CharSequence);
		method @NonNull public android.text.StaticLayout.Builder setTextDirection(@NonNull android.text.TextDirectionHeuristic);
		method @NonNull public android.text.StaticLayout.Builder setUseBoundsForWidth(boolean);
		method @NonNull public android.text.StaticLayout.Builder setUseLineSpacingFromFallbacks(boolean);
		}

		@@ -60548,6 +60555,7 @@ package android.widget {
		method public final android.text.method.TransformationMethod getTransformationMethod();
		method public android.graphics.Typeface getTypeface();
		method public android.text.style.URLSpan[] getUrls();
		method public boolean getUseBoundsForWidth();
		method public boolean hasSelection();
		method public boolean isAllCaps();
		method public boolean isCursorVisible();
		@@ -60690,6 +60698,7 @@ package android.widget {
		method public final void setTransformationMethod(android.text.method.TransformationMethod);
		method public void setTypeface(@Nullable android.graphics.Typeface, int);
		method public void setTypeface(@Nullable android.graphics.Typeface);
		method public void setUseBoundsForWidth(boolean);
		method public void setWidth(int);
		field public static final int AUTO_SIZE_TEXT_TYPE_NONE = 0; // 0x0
		field public static final int AUTO_SIZE_TEXT_TYPE_UNIFORM = 1; // 0x1

core/java/android/text/BoringLayout.java

+84 −11

Original line number	Diff line number	Diff line
		@@ -23,6 +23,7 @@ import android.compat.annotation.UnsupportedAppUsage;
		import android.graphics.Canvas;
		import android.graphics.Paint;
		import android.graphics.Path;
		import android.graphics.RectF;
		import android.graphics.text.LineBreakConfig;
		import android.text.style.ParagraphStyle;

		@@ -191,6 +192,17 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		@NonNull Alignment align, @NonNull BoringLayout.Metrics metrics, boolean includePad,
		@Nullable TextUtils.TruncateAt ellipsize, @IntRange(from = 0) int ellipsizedWidth,
		boolean useFallbackLineSpacing) {
		return replaceOrMake(source, paint, outerWidth, align, 1.0f, 0.0f, metrics, includePad,
		ellipsize, ellipsizedWidth, useFallbackLineSpacing, false /* useBoundsForWidth */);
		}

		/** @hide */
		public @NonNull BoringLayout replaceOrMake(@NonNull CharSequence source,
		@NonNull TextPaint paint, @IntRange(from = 0) int outerWidth,
		@NonNull Alignment align, float spacingMultiplier, float spacingAmount,
		@NonNull BoringLayout.Metrics metrics, boolean includePad,
		@Nullable TextUtils.TruncateAt ellipsize, @IntRange(from = 0) int ellipsizedWidth,
		boolean useFallbackLineSpacing, boolean useBoundsForWidth) {
		boolean trust;

		if (ellipsize == null \|\| ellipsize == TextUtils.TruncateAt.MARQUEE) {
		@@ -202,7 +214,7 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		trust = true;
		} else {
		replaceWith(TextUtils.ellipsize(source, paint, ellipsizedWidth, ellipsize, true, this),
		paint, outerWidth, align, 1f, 0f);
		paint, outerWidth, align, spacingMultiplier, spacingAmount);

		mEllipsizedWidth = ellipsizedWidth;
		trust = false;
		@@ -263,8 +275,7 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		spacingAdd, includePad, false /* fallbackLineSpacing */,
		outerwidth /* ellipsizedWidth /, null / ellipsize /, 1 / maxLines */,
		BREAK_STRATEGY_SIMPLE, HYPHENATION_FREQUENCY_NONE, null /* leftIndents */,
		null /* rightIndents */, JUSTIFICATION_MODE_NONE,
		LineBreakConfig.NONE);
		null /* rightIndents */, JUSTIFICATION_MODE_NONE, LineBreakConfig.NONE, false);

		mEllipsizedWidth = outerwidth;
		mEllipsizedStart = 0;
		@@ -341,7 +352,28 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		ellipsizedWidth, ellipsize, 1 /* maxLines */,
		BREAK_STRATEGY_SIMPLE, HYPHENATION_FREQUENCY_NONE, null /* leftIndents */,
		null /* rightIndents */, JUSTIFICATION_MODE_NONE,
		LineBreakConfig.NONE, metrics);
		LineBreakConfig.NONE, metrics, false /* useBoundsForWidth */);
		}

		/** @hide */
		public BoringLayout(
		CharSequence text,
		TextPaint paint,
		int width,
		Alignment align,
		float spacingMult,
		float spacingAdd,
		boolean includePad,
		boolean fallbackLineSpacing,
		int ellipsizedWidth,
		TextUtils.TruncateAt ellipsize,
		Metrics metrics,
		boolean useBoundsForWidth) {
		this(text, paint, width, align, TextDirectionHeuristics.LTR,
		spacingMult, spacingAdd, includePad, fallbackLineSpacing, ellipsizedWidth,
		ellipsize, 1 /* maxLines */, Layout.BREAK_STRATEGY_SIMPLE,
		Layout.HYPHENATION_FREQUENCY_NONE, null, null, Layout.JUSTIFICATION_MODE_NONE,
		LineBreakConfig.NONE, metrics, useBoundsForWidth);
		}

		/* package */ BoringLayout(
		@@ -363,12 +395,13 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		int[] rightIndents,
		int justificationMode,
		LineBreakConfig lineBreakConfig,
		Metrics metrics) {
		Metrics metrics,
		boolean useBoundsForWidth) {

		super(text, paint, width, align, textDir, spacingMult, spacingAdd, includePad,
		fallbackLineSpacing, ellipsizedWidth, ellipsize, maxLines, breakStrategy,
		hyphenationFrequency, leftIndents, rightIndents, justificationMode,
		lineBreakConfig);
		lineBreakConfig, useBoundsForWidth);


		boolean trust;
		@@ -425,7 +458,7 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		line.set(paint, source, 0, source.length(), Layout.DIR_LEFT_TO_RIGHT,
		Layout.DIRS_ALL_LEFT_TO_RIGHT, false, null,
		mEllipsizedStart, mEllipsizedStart + mEllipsizedCount, useFallbackLineSpacing);
		mMax = (int) Math.ceil(line.metrics(null));
		mMax = (int) Math.ceil(line.metrics(null, null, false));
		TextLine.recycle(line);
		}

		@@ -433,6 +466,9 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		mTopPadding = metrics.top - metrics.ascent;
		mBottomPadding = metrics.bottom - metrics.descent;
		}

		mDrawingBounds.set(metrics.mDrawingBounds);
		mDrawingBounds.offset(0, mBottom - mDesc);
		}

		/**
		@@ -555,7 +591,7 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		0 /* ellipsisStart, 0 since text has not been ellipsized at this point */,
		0 /* ellipsisEnd, 0 since text has not been ellipsized at this point */,
		useFallbackLineSpacing);
		fm.width = (int) Math.ceil(line.metrics(fm));
		fm.width = (int) Math.ceil(line.metrics(fm, fm.mDrawingBounds, false));
		TextLine.recycle(line);

		return fm;
		@@ -604,13 +640,21 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback

		@Override
		public float getLineMax(int line) {
		if (getUseBoundsForWidth()) {
		return super.getLineMax(line);
		} else {
		return mMax;
		}
		}

		@Override
		public float getLineWidth(int line) {
		if (getUseBoundsForWidth()) {
		return super.getLineWidth(line);
		} else {
		return (line == 0 ? mMax : 0);
		}
		}

		@Override
		public final Directions getLineDirections(int line) {
		@@ -647,12 +691,29 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		return mUseFallbackLineSpacing;
		}

		@Override
		public @NonNull RectF computeDrawingBoundingBox() {
		return mDrawingBounds;
		}

		// Override draw so it will be faster.
		@Override
		public void draw(Canvas c, Path highlight, Paint highlightpaint,
		int cursorOffset) {
		if (mDirect != null && highlight == null) {
		if (getUseBoundsForWidth()) {
		c.save();
		RectF drawingRect = computeDrawingBoundingBox();
		if (drawingRect.left < 0) {
		c.translate(-drawingRect.left, 0);
		}
		}

		c.drawText(mDirect, 0, mBottom - mDesc, mPaint);

		if (getUseBoundsForWidth()) {
		c.restore();
		}
		} else {
		super.draw(c, highlight, highlightpaint, cursorOffset);
		}
		@@ -674,12 +735,23 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		private int mTopPadding, mBottomPadding;
		private float mMax;
		private int mEllipsizedWidth, mEllipsizedStart, mEllipsizedCount;
		private final RectF mDrawingBounds = new RectF();

		public static class Metrics extends Paint.FontMetricsInt {
		public int width;
		private final RectF mDrawingBounds = new RectF();

		/**
		* Returns drawing bounding box.
		*
		* @return a drawing bounding box.
		*/
		@NonNull public RectF getDrawingBoundingBox() {
		return mDrawingBounds;
		}

		@Override public String toString() {
		return super.toString() + " width=" + width;
		return super.toString() + " width=" + width + ", drawingBounds = " + mDrawingBounds;
		}

		private void reset() {
		@@ -689,6 +761,7 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		descent = 0;
		width = 0;
		leading = 0;
		mDrawingBounds.setEmpty();
		}
		}
		}

core/java/android/text/DynamicLayout.java

+32 −3

Original line number	Diff line number	Diff line
		@@ -285,6 +285,29 @@ public class DynamicLayout extends Layout {
		return this;
		}

		/**
		* Set true for using width of bounding box as a source of automatic line breaking and
		* drawing.
		*
		* If this value is false, the Layout determines the drawing offset and automatic line
		* breaking based on total advances. By setting true, use all joined glyph's bounding boxes
		* as a source of text width.
		*
		* If the font has glyphs that have negative bearing X or its xMax is greater than advance,
		* the glyph clipping can happen because the drawing area may be bigger. By setting this to
		* true, the Layout will reserve more spaces for drawing.
		*
		* @param useBoundsForWidth True for using bounding box, false for advances.
		* @return this builder instance
		* @see Layout#getUseBoundsForWidth()
		* @see Layout.Builder#setUseBoundsForWidth(boolean)
		*/
		@NonNull
		public Builder setUseBoundsForWidth(boolean useBoundsForWidth) {
		mUseBoundsForWidth = useBoundsForWidth;
		return this;
		}

		/**
		* Build the {@link DynamicLayout} after options have been set.
		*
		@@ -317,6 +340,7 @@ public class DynamicLayout extends Layout {
		private TextUtils.TruncateAt mEllipsize;
		private int mEllipsizedWidth;
		private LineBreakConfig mLineBreakConfig = LineBreakConfig.NONE;
		private boolean mUseBoundsForWidth;

		private final Paint.FontMetricsInt mFontMetricsInt = new Paint.FontMetricsInt();

		@@ -392,7 +416,7 @@ public class DynamicLayout extends Layout {
		false /* fallbackLineSpacing */, ellipsizedWidth, ellipsize,
		Integer.MAX_VALUE /* maxLines */, breakStrategy, hyphenationFrequency,
		null /* leftIndents /, null / rightIndents */, justificationMode,
		lineBreakConfig);
		lineBreakConfig, false /* useBoundsForWidth */);

		final Builder b = Builder.obtain(base, paint, width)
		.setAlignment(align)
		@@ -418,7 +442,7 @@ public class DynamicLayout extends Layout {
		b.mIncludePad, b.mFallbackLineSpacing, b.mEllipsizedWidth, b.mEllipsize,
		Integer.MAX_VALUE /* maxLines */, b.mBreakStrategy, b.mHyphenationFrequency,
		null /* leftIndents /, null / rightIndents */, b.mJustificationMode,
		b.mLineBreakConfig);
		b.mLineBreakConfig, b.mUseBoundsForWidth);

		mDisplay = b.mDisplay;
		mIncludePad = b.mIncludePad;
		@@ -445,6 +469,7 @@ public class DynamicLayout extends Layout {
		private void generate(@NonNull Builder b) {
		mBase = b.mBase;
		mFallbackLineSpacing = b.mFallbackLineSpacing;
		mUseBoundsForWidth = b.mUseBoundsForWidth;
		if (b.mEllipsize != null) {
		mInts = new PackedIntVector(COLUMNS_ELLIPSIZE);
		mEllipsizedWidth = b.mEllipsizedWidth;
		@@ -639,7 +664,9 @@ public class DynamicLayout extends Layout {
		.setJustificationMode(mJustificationMode)
		.setLineBreakConfig(mLineBreakConfig)
		.setAddLastLineLineSpacing(!islast)
		.setIncludePad(false);
		.setIncludePad(false)
		.setUseBoundsForWidth(mUseBoundsForWidth)
		.setCalculateBounds(true);

		reflowed = b.buildPartialStaticLayoutForDynamicLayout(true /* trackpadding */, reflowed);
		int n = reflowed.getLineCount();
		@@ -1290,6 +1317,8 @@ public class DynamicLayout extends Layout {

		private Rect mTempRect = new Rect();

		private boolean mUseBoundsForWidth;

		@UnsupportedAppUsage
		private static StaticLayout sStaticLayout = null;
		private static StaticLayout.Builder sBuilder = null;

core/java/android/text/Layout.java

+144 −11

File changed.

Preview size limit exceeded, changes collapsed.

core/java/android/text/MeasuredParagraph.java

+6 −3

Original line number	Diff line number	Diff line
		@@ -460,10 +460,11 @@ public class MeasuredParagraph {
		@NonNull TextDirectionHeuristic textDir,
		int hyphenationMode,
		boolean computeLayout,
		boolean computeBounds,
		@Nullable MeasuredParagraph hint,
		@Nullable MeasuredParagraph recycle) {
		return buildForStaticLayoutInternal(paint, lineBreakConfig, text, start, end, textDir,
		hyphenationMode, computeLayout, hint, recycle, null);
		hyphenationMode, computeLayout, computeBounds, hint, recycle, null);
		}

		/**
		@@ -498,7 +499,7 @@ public class MeasuredParagraph {
		boolean computeLayout,
		@Nullable StyleRunCallback testCallback) {
		return buildForStaticLayoutInternal(paint, lineBreakConfig, text, start, end, textDir,
		hyphenationMode, computeLayout, null, null, testCallback);
		hyphenationMode, computeLayout, false, null, null, testCallback);
		}

		private static @NonNull MeasuredParagraph buildForStaticLayoutInternal(
		@@ -510,6 +511,7 @@ public class MeasuredParagraph {
		@NonNull TextDirectionHeuristic textDir,
		int hyphenationMode,
		boolean computeLayout,
		boolean computeBounds,
		@Nullable MeasuredParagraph hint,
		@Nullable MeasuredParagraph recycle,
		@Nullable StyleRunCallback testCallback) {
		@@ -519,7 +521,8 @@ public class MeasuredParagraph {
		if (hint == null) {
		builder = new MeasuredText.Builder(mt.mCopiedBuffer)
		.setComputeHyphenation(hyphenationMode)
		.setComputeLayout(computeLayout);
		.setComputeLayout(computeLayout)
		.setComputeBounds(computeBounds);
		} else {
		builder = new MeasuredText.Builder(hint.mMeasuredText);
		}