Merge "Add BoringLayout constructor API docs" (b097553b) · Commits · e / os / android_frameworks_base

core/java/android/text/BoringLayout.java

+131 −75

Original line number	Diff line number	Diff line
		@@ -35,46 +35,80 @@ import android.text.style.ParagraphStyle;
		* Canvas.drawText()} directly.</p>
		*/
		public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback {
		public static BoringLayout make(CharSequence source,
		TextPaint paint, int outerwidth,
		Alignment align,
		float spacingmult, float spacingadd,
		BoringLayout.Metrics metrics, boolean includepad) {
		return new BoringLayout(source, paint, outerwidth, align,
		spacingmult, spacingadd, metrics,
		includepad);
		}

		public static BoringLayout make(CharSequence source,
		TextPaint paint, int outerwidth,
		Alignment align,
		float spacingmult, float spacingadd,
		BoringLayout.Metrics metrics, boolean includepad,
		TextUtils.TruncateAt ellipsize, int ellipsizedWidth) {
		return new BoringLayout(source, paint, outerwidth, align,
		spacingmult, spacingadd, metrics,
		includepad, ellipsize, ellipsizedWidth);

		/**
		* Utility function to construct a BoringLayout instance.
		*
		* @param source the text to render
		* @param paint the default paint for the layout
		* @param outerWidth the wrapping width for the text
		* @param align whether to left, right, or center the text
		* @param spacingMult this value is no longer used by BoringLayout
		* @param spacingAdd this value is no longer used by BoringLayout
		* @param metrics {@code #Metrics} instance that contains information about FontMetrics and
		* line width
		* @param includePad set whether to include extra space beyond font ascent and descent which is
		* needed to avoid clipping in some scripts
		*/
		public static BoringLayout make(CharSequence source, TextPaint paint, int outerWidth,
		Alignment align, float spacingMult, float spacingAdd, BoringLayout.Metrics metrics,
		boolean includePad) {
		return new BoringLayout(source, paint, outerWidth, align, spacingMult, spacingAdd, metrics,
		includePad);
		}

		/**
		* Utility function to construct a BoringLayout instance.
		*
		* @param source the text to render
		* @param paint the default paint for the layout
		* @param outerWidth the wrapping width for the text
		* @param align whether to left, right, or center the text
		* @param spacingmult this value is no longer used by BoringLayout
		* @param spacingadd this value is no longer used by BoringLayout
		* @param metrics {@code #Metrics} instance that contains information about FontMetrics and
		* line width
		* @param includePad set whether to include extra space beyond font ascent and descent which is
		* needed to avoid clipping in some scripts
		* @param ellipsize whether to ellipsize the text if width of the text is longer than the
		* requested width
		* @param ellipsizedWidth the width to which this Layout is ellipsizing. If {@code ellipsize} is
		* {@code null}, or is {@link TextUtils.TruncateAt#MARQUEE} this value is
		* not used, {@code outerWidth} is used instead
		*/
		public static BoringLayout make(CharSequence source, TextPaint paint, int outerWidth,
		Alignment align, float spacingmult, float spacingadd, BoringLayout.Metrics metrics,
		boolean includePad, TextUtils.TruncateAt ellipsize, int ellipsizedWidth) {
		return new BoringLayout(source, paint, outerWidth, align, spacingmult, spacingadd, metrics,
		includePad, ellipsize, ellipsizedWidth);
		}

		/**
		* Returns a BoringLayout for the specified text, potentially reusing
		* this one if it is already suitable. The caller must make sure that
		* no one is still using this Layout.
		*
		* @param source the text to render
		* @param paint the default paint for the layout
		* @param outerwidth the wrapping width for the text
		* @param align whether to left, right, or center the text
		* @param spacingMult this value is no longer used by BoringLayout
		* @param spacingAdd this value is no longer used by BoringLayout
		* @param metrics {@code #Metrics} instance that contains information about FontMetrics and
		* line width
		* @param includePad set whether to include extra space beyond font ascent and descent which is
		* needed to avoid clipping in some scripts
		*/
		public BoringLayout replaceOrMake(CharSequence source, TextPaint paint,
		int outerwidth, Alignment align,
		float spacingmult, float spacingadd,
		BoringLayout.Metrics metrics,
		boolean includepad) {
		replaceWith(source, paint, outerwidth, align, spacingmult,
		spacingadd);
		public BoringLayout replaceOrMake(CharSequence source, TextPaint paint, int outerwidth,
		Alignment align, float spacingMult, float spacingAdd, BoringLayout.Metrics metrics,
		boolean includePad) {
		replaceWith(source, paint, outerwidth, align, spacingMult, spacingAdd);

		mEllipsizedWidth = outerwidth;
		mEllipsizedStart = 0;
		mEllipsizedCount = 0;

		init(source, paint, outerwidth, align, spacingmult, spacingadd,
		metrics, includepad, true);
		init(source, paint, align, metrics, includePad, true);
		return this;
		}

		@@ -82,95 +116,118 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		* Returns a BoringLayout for the specified text, potentially reusing
		* this one if it is already suitable. The caller must make sure that
		* no one is still using this Layout.
		*
		* @param source the text to render
		* @param paint the default paint for the layout
		* @param outerWidth the wrapping width for the text
		* @param align whether to left, right, or center the text
		* @param spacingMult this value is no longer used by BoringLayout
		* @param spacingAdd this value is no longer used by BoringLayout
		* @param metrics {@code #Metrics} instance that contains information about FontMetrics and
		* line width
		* @param includePad set whether to include extra space beyond font ascent and descent which is
		* needed to avoid clipping in some scripts
		* @param ellipsize whether to ellipsize the text if width of the text is longer than the
		* requested width
		* @param ellipsizedWidth the width to which this Layout is ellipsizing. If {@code ellipsize} is
		* {@code null}, or is {@link TextUtils.TruncateAt#MARQUEE} this value is
		* not used, {@code outerwidth} is used instead
		*/
		public BoringLayout replaceOrMake(CharSequence source, TextPaint paint,
		int outerwidth, Alignment align,
		float spacingmult, float spacingadd,
		BoringLayout.Metrics metrics,
		boolean includepad,
		TextUtils.TruncateAt ellipsize,
		int ellipsizedWidth) {
		public BoringLayout replaceOrMake(CharSequence source, TextPaint paint, int outerWidth,
		Alignment align, float spacingMult, float spacingAdd, BoringLayout.Metrics metrics,
		boolean includePad, TextUtils.TruncateAt ellipsize, int ellipsizedWidth) {
		boolean trust;

		if (ellipsize == null \|\| ellipsize == TextUtils.TruncateAt.MARQUEE) {
		replaceWith(source, paint, outerwidth, align, spacingmult,
		spacingadd);
		replaceWith(source, paint, outerWidth, align, spacingMult, spacingAdd);

		mEllipsizedWidth = outerwidth;
		mEllipsizedWidth = outerWidth;
		mEllipsizedStart = 0;
		mEllipsizedCount = 0;
		trust = true;
		} else {
		replaceWith(TextUtils.ellipsize(source, paint, ellipsizedWidth,
		ellipsize, true, this),
		paint, outerwidth, align, spacingmult,
		spacingadd);
		replaceWith(TextUtils.ellipsize(source, paint, ellipsizedWidth, ellipsize, true, this),
		paint, outerWidth, align, spacingMult, spacingAdd);

		mEllipsizedWidth = ellipsizedWidth;
		trust = false;
		}

		init(getText(), paint, outerwidth, align, spacingmult, spacingadd,
		metrics, includepad, trust);
		init(getText(), paint, align, metrics, includePad, trust);
		return this;
		}

		public BoringLayout(CharSequence source,
		TextPaint paint, int outerwidth,
		Alignment align,
		float spacingmult, float spacingadd,
		BoringLayout.Metrics metrics, boolean includepad) {
		super(source, paint, outerwidth, align, spacingmult, spacingadd);
		/**
		* @param source the text to render
		* @param paint the default paint for the layout
		* @param outerwidth the wrapping width for the text
		* @param align whether to left, right, or center the text
		* @param spacingMult this value is no longer used by BoringLayout
		* @param spacingAdd this value is no longer used by BoringLayout
		* @param metrics {@code #Metrics} instance that contains information about FontMetrics and
		* line width
		* @param includePad set whether to include extra space beyond font ascent and descent which is
		* needed to avoid clipping in some scripts
		*/
		public BoringLayout(CharSequence source, TextPaint paint, int outerwidth, Alignment align,
		float spacingMult, float spacingAdd, BoringLayout.Metrics metrics, boolean includePad) {
		super(source, paint, outerwidth, align, spacingMult, spacingAdd);

		mEllipsizedWidth = outerwidth;
		mEllipsizedStart = 0;
		mEllipsizedCount = 0;

		init(source, paint, outerwidth, align, spacingmult, spacingadd,
		metrics, includepad, true);
		init(source, paint, align, metrics, includePad, true);
		}

		public BoringLayout(CharSequence source,
		TextPaint paint, int outerwidth,
		Alignment align,
		float spacingmult, float spacingadd,
		BoringLayout.Metrics metrics, boolean includepad,
		/**
		*
		* @param source the text to render
		* @param paint the default paint for the layout
		* @param outerWidth the wrapping width for the text
		* @param align whether to left, right, or center the text
		* @param spacingMult this value is no longer used by BoringLayout
		* @param spacingAdd this value is no longer used by BoringLayout
		* @param metrics {@code #Metrics} instance that contains information about FontMetrics and
		* line width
		* @param includePad set whether to include extra space beyond font ascent and descent which is
		* needed to avoid clipping in some scripts
		* @param ellipsize whether to ellipsize the text if width of the text is longer than the
		* requested {@code outerwidth}
		* @param ellipsizedWidth the width to which this Layout is ellipsizing. If {@code ellipsize} is
		* {@code null}, or is {@link TextUtils.TruncateAt#MARQUEE} this value is
		* not used, {@code outerwidth} is used instead
		*/
		public BoringLayout(CharSequence source, TextPaint paint, int outerWidth, Alignment align,
		float spacingMult, float spacingAdd, BoringLayout.Metrics metrics, boolean includePad,
		TextUtils.TruncateAt ellipsize, int ellipsizedWidth) {
		/*
		* It is silly to have to call super() and then replaceWith(),
		* but we can't use "this" for the callback until the call to
		* super() finishes.
		*/
		super(source, paint, outerwidth, align, spacingmult, spacingadd);
		super(source, paint, outerWidth, align, spacingMult, spacingAdd);

		boolean trust;

		if (ellipsize == null \|\| ellipsize == TextUtils.TruncateAt.MARQUEE) {
		mEllipsizedWidth = outerwidth;
		mEllipsizedWidth = outerWidth;
		mEllipsizedStart = 0;
		mEllipsizedCount = 0;
		trust = true;
		} else {
		replaceWith(TextUtils.ellipsize(source, paint, ellipsizedWidth,
		ellipsize, true, this),
		paint, outerwidth, align, spacingmult,
		spacingadd);

		replaceWith(TextUtils.ellipsize(source, paint, ellipsizedWidth, ellipsize, true, this),
		paint, outerWidth, align, spacingMult, spacingAdd);

		mEllipsizedWidth = ellipsizedWidth;
		trust = false;
		}

		init(getText(), paint, outerwidth, align, spacingmult, spacingadd,
		metrics, includepad, trust);
		init(getText(), paint, align, metrics, includePad, trust);
		}

		/* package */ void init(CharSequence source,
		TextPaint paint, int outerwidth,
		Alignment align,
		float spacingmult, float spacingadd,
		BoringLayout.Metrics metrics, boolean includepad,
		boolean trustWidth) {
		/* package */ void init(CharSequence source, TextPaint paint, Alignment align,
		BoringLayout.Metrics metrics, boolean includePad, boolean trustWidth) {
		int spacing;

		if (source instanceof String && align == Layout.Alignment.ALIGN_NORMAL) {
		@@ -181,7 +238,7 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback

		mPaint = paint;

		if (includepad) {
		if (includePad) {
		spacing = metrics.bottom - metrics.top;
		mDesc = metrics.bottom;
		} else {
		@@ -206,7 +263,7 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		TextLine.recycle(line);
		}

		if (includepad) {
		if (includePad) {
		mTopPadding = metrics.top - metrics.ascent;
		mBottomPadding = metrics.bottom - metrics.descent;
		}
		@@ -215,8 +272,7 @@ public class BoringLayout extends Layout implements TextUtils.EllipsizeCallback
		/**
		* Returns null if not boring; the width, ascent, and descent if boring.
		*/
		public static Metrics isBoring(CharSequence text,
		TextPaint paint) {
		public static Metrics isBoring(CharSequence text, TextPaint paint) {
		return isBoring(text, paint, TextDirectionHeuristics.FIRSTSTRONG_LTR, null);
		}