--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/classes/java/awt/font/TextLayout.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,2762 @@
+/*
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * (C) Copyright Taligent, Inc. 1996 - 1997, All Rights Reserved
+ * (C) Copyright IBM Corp. 1996-2003, All Rights Reserved
+ *
+ * The original version of this source code and documentation is
+ * copyrighted and owned by Taligent, Inc., a wholly-owned subsidiary
+ * of IBM. These materials are provided under terms of a License
+ * Agreement between Taligent and Sun. This technology is protected
+ * by multiple US and International patents.
+ *
+ * This notice and attribution to Taligent may not be removed.
+ * Taligent is a registered trademark of Taligent, Inc.
+ *
+ */
+
+package java.awt.font;
+
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.Graphics2D;
+import java.awt.Rectangle;
+import java.awt.Shape;
+import java.awt.font.NumericShaper;
+import java.awt.font.TextLine.TextLineMetrics;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.GeneralPath;
+import java.awt.geom.NoninvertibleTransformException;
+import java.awt.geom.Point2D;
+import java.awt.geom.Rectangle2D;
+import java.text.AttributedString;
+import java.text.AttributedCharacterIterator;
+import java.text.AttributedCharacterIterator.Attribute;
+import java.text.CharacterIterator;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.Hashtable;
+import sun.font.AttributeValues;
+import sun.font.CodePointIterator;
+import sun.font.CoreMetrics;
+import sun.font.Decoration;
+import sun.font.FontLineMetrics;
+import sun.font.FontResolver;
+import sun.font.GraphicComponent;
+import sun.font.LayoutPathImpl;
+
+/**
+ *
+ * <code>TextLayout</code> is an immutable graphical representation of styled
+ * character data.
+ * <p>
+ * It provides the following capabilities:
+ * <ul>
+ * <li>implicit bidirectional analysis and reordering,
+ * <li>cursor positioning and movement, including split cursors for
+ * mixed directional text,
+ * <li>highlighting, including both logical and visual highlighting
+ * for mixed directional text,
+ * <li>multiple baselines (roman, hanging, and centered),
+ * <li>hit testing,
+ * <li>justification,
+ * <li>default font substitution,
+ * <li>metric information such as ascent, descent, and advance, and
+ * <li>rendering
+ * </ul>
+ * <p>
+ * A <code>TextLayout</code> object can be rendered using
+ * its <code>draw</code> method.
+ * <p>
+ * <code>TextLayout</code> can be constructed either directly or through
+ * the use of a {@link LineBreakMeasurer}. When constructed directly, the
+ * source text represents a single paragraph. <code>LineBreakMeasurer</code>
+ * allows styled text to be broken into lines that fit within a particular
+ * width. See the <code>LineBreakMeasurer</code> documentation for more
+ * information.
+ * <p>
+ * <code>TextLayout</code> construction logically proceeds as follows:
+ * <ul>
+ * <li>paragraph attributes are extracted and examined,
+ * <li>text is analyzed for bidirectional reordering, and reordering
+ * information is computed if needed,
+ * <li>text is segmented into style runs
+ * <li>fonts are chosen for style runs, first by using a font if the
+ * attribute {@link TextAttribute#FONT} is present, otherwise by computing
+ * a default font using the attributes that have been defined
+ * <li>if text is on multiple baselines, the runs or subruns are further
+ * broken into subruns sharing a common baseline,
+ * <li>glyphvectors are generated for each run using the chosen font,
+ * <li>final bidirectional reordering is performed on the glyphvectors
+ * </ul>
+ * <p>
+ * All graphical information returned from a <code>TextLayout</code>
+ * object's methods is relative to the origin of the
+ * <code>TextLayout</code>, which is the intersection of the
+ * <code>TextLayout</code> object's baseline with its left edge. Also,
+ * coordinates passed into a <code>TextLayout</code> object's methods
+ * are assumed to be relative to the <code>TextLayout</code> object's
+ * origin. Clients usually need to translate between a
+ * <code>TextLayout</code> object's coordinate system and the coordinate
+ * system in another object (such as a
+ * {@link java.awt.Graphics Graphics} object).
+ * <p>
+ * <code>TextLayout</code> objects are constructed from styled text,
+ * but they do not retain a reference to their source text. Thus,
+ * changes in the text previously used to generate a <code>TextLayout</code>
+ * do not affect the <code>TextLayout</code>.
+ * <p>
+ * Three methods on a <code>TextLayout</code> object
+ * (<code>getNextRightHit</code>, <code>getNextLeftHit</code>, and
+ * <code>hitTestChar</code>) return instances of {@link TextHitInfo}.
+ * The offsets contained in these <code>TextHitInfo</code> objects
+ * are relative to the start of the <code>TextLayout</code>, <b>not</b>
+ * to the text used to create the <code>TextLayout</code>. Similarly,
+ * <code>TextLayout</code> methods that accept <code>TextHitInfo</code>
+ * instances as parameters expect the <code>TextHitInfo</code> object's
+ * offsets to be relative to the <code>TextLayout</code>, not to any
+ * underlying text storage model.
+ * <p>
+ * <strong>Examples</strong>:<p>
+ * Constructing and drawing a <code>TextLayout</code> and its bounding
+ * rectangle:
+ * <blockquote><pre>
+ * Graphics2D g = ...;
+ * Point2D loc = ...;
+ * Font font = Font.getFont("Helvetica-bold-italic");
+ * FontRenderContext frc = g.getFontRenderContext();
+ * TextLayout layout = new TextLayout("This is a string", font, frc);
+ * layout.draw(g, (float)loc.getX(), (float)loc.getY());
+ *
+ * Rectangle2D bounds = layout.getBounds();
+ * bounds.setRect(bounds.getX()+loc.getX(),
+ * bounds.getY()+loc.getY(),
+ * bounds.getWidth(),
+ * bounds.getHeight());
+ * g.draw(bounds);
+ * </pre>
+ * </blockquote>
+ * <p>
+ * Hit-testing a <code>TextLayout</code> (determining which character is at
+ * a particular graphical location):
+ * <blockquote><pre>
+ * Point2D click = ...;
+ * TextHitInfo hit = layout.hitTestChar(
+ * (float) (click.getX() - loc.getX()),
+ * (float) (click.getY() - loc.getY()));
+ * </pre>
+ * </blockquote>
+ * <p>
+ * Responding to a right-arrow key press:
+ * <blockquote><pre>
+ * int insertionIndex = ...;
+ * TextHitInfo next = layout.getNextRightHit(insertionIndex);
+ * if (next != null) {
+ * // translate graphics to origin of layout on screen
+ * g.translate(loc.getX(), loc.getY());
+ * Shape[] carets = layout.getCaretShapes(next.getInsertionIndex());
+ * g.draw(carets[0]);
+ * if (carets[1] != null) {
+ * g.draw(carets[1]);
+ * }
+ * }
+ * </pre></blockquote>
+ * <p>
+ * Drawing a selection range corresponding to a substring in the source text.
+ * The selected area may not be visually contiguous:
+ * <blockquote><pre>
+ * // selStart, selLimit should be relative to the layout,
+ * // not to the source text
+ *
+ * int selStart = ..., selLimit = ...;
+ * Color selectionColor = ...;
+ * Shape selection = layout.getLogicalHighlightShape(selStart, selLimit);
+ * // selection may consist of disjoint areas
+ * // graphics is assumed to be tranlated to origin of layout
+ * g.setColor(selectionColor);
+ * g.fill(selection);
+ * </pre></blockquote>
+ * <p>
+ * Drawing a visually contiguous selection range. The selection range may
+ * correspond to more than one substring in the source text. The ranges of
+ * the corresponding source text substrings can be obtained with
+ * <code>getLogicalRangesForVisualSelection()</code>:
+ * <blockquote><pre>
+ * TextHitInfo selStart = ..., selLimit = ...;
+ * Shape selection = layout.getVisualHighlightShape(selStart, selLimit);
+ * g.setColor(selectionColor);
+ * g.fill(selection);
+ * int[] ranges = getLogicalRangesForVisualSelection(selStart, selLimit);
+ * // ranges[0], ranges[1] is the first selection range,
+ * // ranges[2], ranges[3] is the second selection range, etc.
+ * </pre></blockquote>
+ * <p>
+ * Note: Font rotations can cause text baselines to be rotated, and
+ * multiple runs with different rotations can cause the baseline to
+ * bend or zig-zag. In order to account for this (rare) possibility,
+ * some APIs are specified to return metrics and take parameters 'in
+ * baseline-relative coordinates' (e.g. ascent, advance), and others
+ * are in 'in standard coordinates' (e.g. getBounds). Values in
+ * baseline-relative coordinates map the 'x' coordinate to the
+ * distance along the baseline, (positive x is forward along the
+ * baseline), and the 'y' coordinate to a distance along the
+ * perpendicular to the baseline at 'x' (positive y is 90 degrees
+ * clockwise from the baseline vector). Values in standard
+ * coordinates are measured along the x and y axes, with 0,0 at the
+ * origin of the TextLayout. Documentation for each relevant API
+ * indicates what values are in what coordinate system. In general,
+ * measurement-related APIs are in baseline-relative coordinates,
+ * while display-related APIs are in standard coordinates.
+ *
+ * @see LineBreakMeasurer
+ * @see TextAttribute
+ * @see TextHitInfo
+ * @see LayoutPath
+ */
+public final class TextLayout implements Cloneable {
+
+ private int characterCount;
+ private boolean isVerticalLine = false;
+ private byte baseline;
+ private float[] baselineOffsets; // why have these ?
+ private TextLine textLine;
+
+ // cached values computed from GlyphSets and set info:
+ // all are recomputed from scratch in buildCache()
+ private TextLine.TextLineMetrics lineMetrics = null;
+ private float visibleAdvance;
+ private int hashCodeCache;
+
+ /*
+ * TextLayouts are supposedly immutable. If you mutate a TextLayout under
+ * the covers (like the justification code does) you'll need to set this
+ * back to false. Could be replaced with textLine != null <--> cacheIsValid.
+ */
+ private boolean cacheIsValid = false;
+
+
+ // This value is obtained from an attribute, and constrained to the
+ // interval [0,1]. If 0, the layout cannot be justified.
+ private float justifyRatio;
+
+ // If a layout is produced by justification, then that layout
+ // cannot be justified. To enforce this constraint the
+ // justifyRatio of the justified layout is set to this value.
+ private static final float ALREADY_JUSTIFIED = -53.9f;
+
+ // dx and dy specify the distance between the TextLayout's origin
+ // and the origin of the leftmost GlyphSet (TextLayoutComponent,
+ // actually). They were used for hanging punctuation support,
+ // which is no longer implemented. Currently they are both always 0,
+ // and TextLayout is not guaranteed to work with non-zero dx, dy
+ // values right now. They were left in as an aide and reminder to
+ // anyone who implements hanging punctuation or other similar stuff.
+ // They are static now so they don't take up space in TextLayout
+ // instances.
+ private static float dx;
+ private static float dy;
+
+ /*
+ * Natural bounds is used internally. It is built on demand in
+ * getNaturalBounds.
+ */
+ private Rectangle2D naturalBounds = null;
+
+ /*
+ * boundsRect encloses all of the bits this TextLayout can draw. It
+ * is build on demand in getBounds.
+ */
+ private Rectangle2D boundsRect = null;
+
+ /*
+ * flag to supress/allow carets inside of ligatures when hit testing or
+ * arrow-keying
+ */
+ private boolean caretsInLigaturesAreAllowed = false;
+
+ /**
+ * Defines a policy for determining the strong caret location.
+ * This class contains one method, <code>getStrongCaret</code>, which
+ * is used to specify the policy that determines the strong caret in
+ * dual-caret text. The strong caret is used to move the caret to the
+ * left or right. Instances of this class can be passed to
+ * <code>getCaretShapes</code>, <code>getNextLeftHit</code> and
+ * <code>getNextRightHit</code> to customize strong caret
+ * selection.
+ * <p>
+ * To specify alternate caret policies, subclass <code>CaretPolicy</code>
+ * and override <code>getStrongCaret</code>. <code>getStrongCaret</code>
+ * should inspect the two <code>TextHitInfo</code> arguments and choose
+ * one of them as the strong caret.
+ * <p>
+ * Most clients do not need to use this class.
+ */
+ public static class CaretPolicy {
+
+ /**
+ * Constructs a <code>CaretPolicy</code>.
+ */
+ public CaretPolicy() {
+ }
+
+ /**
+ * Chooses one of the specified <code>TextHitInfo</code> instances as
+ * a strong caret in the specified <code>TextLayout</code>.
+ * @param hit1 a valid hit in <code>layout</code>
+ * @param hit2 a valid hit in <code>layout</code>
+ * @param layout the <code>TextLayout</code> in which
+ * <code>hit1</code> and <code>hit2</code> are used
+ * @return <code>hit1</code> or <code>hit2</code>
+ * (or an equivalent <code>TextHitInfo</code>), indicating the
+ * strong caret.
+ */
+ public TextHitInfo getStrongCaret(TextHitInfo hit1,
+ TextHitInfo hit2,
+ TextLayout layout) {
+
+ // default implementation just calls private method on layout
+ return layout.getStrongHit(hit1, hit2);
+ }
+ }
+
+ /**
+ * This <code>CaretPolicy</code> is used when a policy is not specified
+ * by the client. With this policy, a hit on a character whose direction
+ * is the same as the line direction is stronger than a hit on a
+ * counterdirectional character. If the characters' directions are
+ * the same, a hit on the leading edge of a character is stronger
+ * than a hit on the trailing edge of a character.
+ */
+ public static final CaretPolicy DEFAULT_CARET_POLICY = new CaretPolicy();
+
+ /**
+ * Constructs a <code>TextLayout</code> from a <code>String</code>
+ * and a {@link Font}. All the text is styled using the specified
+ * <code>Font</code>.
+ * <p>
+ * The <code>String</code> must specify a single paragraph of text,
+ * because an entire paragraph is required for the bidirectional
+ * algorithm.
+ * @param string the text to display
+ * @param font a <code>Font</code> used to style the text
+ * @param frc contains information about a graphics device which is needed
+ * to measure the text correctly.
+ * Text measurements can vary slightly depending on the
+ * device resolution, and attributes such as antialiasing. This
+ * parameter does not specify a translation between the
+ * <code>TextLayout</code> and user space.
+ */
+ public TextLayout(String string, Font font, FontRenderContext frc) {
+
+ if (font == null) {
+ throw new IllegalArgumentException("Null font passed to TextLayout constructor.");
+ }
+
+ if (string == null) {
+ throw new IllegalArgumentException("Null string passed to TextLayout constructor.");
+ }
+
+ if (string.length() == 0) {
+ throw new IllegalArgumentException("Zero length string passed to TextLayout constructor.");
+ }
+
+ Map<? extends Attribute, ?> attributes = null;
+ if (font.hasLayoutAttributes()) {
+ attributes = font.getAttributes();
+ }
+
+ char[] text = string.toCharArray();
+ if (sameBaselineUpTo(font, text, 0, text.length) == text.length) {
+ fastInit(text, font, attributes, frc);
+ } else {
+ AttributedString as = attributes == null
+ ? new AttributedString(string)
+ : new AttributedString(string, attributes);
+ as.addAttribute(TextAttribute.FONT, font);
+ standardInit(as.getIterator(), text, frc);
+ }
+ }
+
+ /**
+ * Constructs a <code>TextLayout</code> from a <code>String</code>
+ * and an attribute set.
+ * <p>
+ * All the text is styled using the provided attributes.
+ * <p>
+ * <code>string</code> must specify a single paragraph of text because an
+ * entire paragraph is required for the bidirectional algorithm.
+ * @param string the text to display
+ * @param attributes the attributes used to style the text
+ * @param frc contains information about a graphics device which is needed
+ * to measure the text correctly.
+ * Text measurements can vary slightly depending on the
+ * device resolution, and attributes such as antialiasing. This
+ * parameter does not specify a translation between the
+ * <code>TextLayout</code> and user space.
+ */
+ public TextLayout(String string, Map<? extends Attribute,?> attributes,
+ FontRenderContext frc)
+ {
+ if (string == null) {
+ throw new IllegalArgumentException("Null string passed to TextLayout constructor.");
+ }
+
+ if (attributes == null) {
+ throw new IllegalArgumentException("Null map passed to TextLayout constructor.");
+ }
+
+ if (string.length() == 0) {
+ throw new IllegalArgumentException("Zero length string passed to TextLayout constructor.");
+ }
+
+ char[] text = string.toCharArray();
+ Font font = singleFont(text, 0, text.length, attributes);
+ if (font != null) {
+ fastInit(text, font, attributes, frc);
+ } else {
+ AttributedString as = new AttributedString(string, attributes);
+ standardInit(as.getIterator(), text, frc);
+ }
+ }
+
+ /*
+ * Determines a font for the attributes, and if a single font can render
+ * all the text on one baseline, return it, otherwise null. If the
+ * attributes specify a font, assume it can display all the text without
+ * checking.
+ * If the AttributeSet contains an embedded graphic, return null.
+ */
+ private static Font singleFont(char[] text,
+ int start,
+ int limit,
+ Map<? extends Attribute, ?> attributes) {
+
+ if (attributes.get(TextAttribute.CHAR_REPLACEMENT) != null) {
+ return null;
+ }
+
+ Font font = null;
+ try {
+ font = (Font)attributes.get(TextAttribute.FONT);
+ }
+ catch (ClassCastException e) {
+ }
+ if (font == null) {
+ if (attributes.get(TextAttribute.FAMILY) != null) {
+ font = Font.getFont(attributes);
+ if (font.canDisplayUpTo(text, start, limit) != -1) {
+ return null;
+ }
+ } else {
+ FontResolver resolver = FontResolver.getInstance();
+ CodePointIterator iter = CodePointIterator.create(text, start, limit);
+ int fontIndex = resolver.nextFontRunIndex(iter);
+ if (iter.charIndex() == limit) {
+ font = resolver.getFont(fontIndex, attributes);
+ }
+ }
+ }
+
+ if (sameBaselineUpTo(font, text, start, limit) != limit) {
+ return null;
+ }
+
+ return font;
+ }
+
+ /**
+ * Constructs a <code>TextLayout</code> from an iterator over styled text.
+ * <p>
+ * The iterator must specify a single paragraph of text because an
+ * entire paragraph is required for the bidirectional
+ * algorithm.
+ * @param text the styled text to display
+ * @param frc contains information about a graphics device which is needed
+ * to measure the text correctly.
+ * Text measurements can vary slightly depending on the
+ * device resolution, and attributes such as antialiasing. This
+ * parameter does not specify a translation between the
+ * <code>TextLayout</code> and user space.
+ */
+ public TextLayout(AttributedCharacterIterator text, FontRenderContext frc) {
+
+ if (text == null) {
+ throw new IllegalArgumentException("Null iterator passed to TextLayout constructor.");
+ }
+
+ int start = text.getBeginIndex();
+ int limit = text.getEndIndex();
+ if (start == limit) {
+ throw new IllegalArgumentException("Zero length iterator passed to TextLayout constructor.");
+ }
+
+ int len = limit - start;
+ text.first();
+ char[] chars = new char[len];
+ int n = 0;
+ for (char c = text.first();
+ c != CharacterIterator.DONE;
+ c = text.next())
+ {
+ chars[n++] = c;
+ }
+
+ text.first();
+ if (text.getRunLimit() == limit) {
+
+ Map<? extends Attribute, ?> attributes = text.getAttributes();
+ Font font = singleFont(chars, 0, len, attributes);
+ if (font != null) {
+ fastInit(chars, font, attributes, frc);
+ return;
+ }
+ }
+
+ standardInit(text, chars, frc);
+ }
+
+ /**
+ * Creates a <code>TextLayout</code> from a {@link TextLine} and
+ * some paragraph data. This method is used by {@link TextMeasurer}.
+ * @param textLine the line measurement attributes to apply to the
+ * the resulting <code>TextLayout</code>
+ * @param baseline the baseline of the text
+ * @param baselineOffsets the baseline offsets for this
+ * <code>TextLayout</code>. This should already be normalized to
+ * <code>baseline</code>
+ * @param justifyRatio <code>0</code> if the <code>TextLayout</code>
+ * cannot be justified; <code>1</code> otherwise.
+ */
+ TextLayout(TextLine textLine,
+ byte baseline,
+ float[] baselineOffsets,
+ float justifyRatio) {
+
+ this.characterCount = textLine.characterCount();
+ this.baseline = baseline;
+ this.baselineOffsets = baselineOffsets;
+ this.textLine = textLine;
+ this.justifyRatio = justifyRatio;
+ }
+
+ /**
+ * Initialize the paragraph-specific data.
+ */
+ private void paragraphInit(byte aBaseline, CoreMetrics lm,
+ Map<? extends Attribute, ?> paragraphAttrs,
+ char[] text) {
+
+ baseline = aBaseline;
+
+ // normalize to current baseline
+ baselineOffsets = TextLine.getNormalizedOffsets(lm.baselineOffsets, baseline);
+
+ justifyRatio = AttributeValues.getJustification(paragraphAttrs);
+ NumericShaper shaper = AttributeValues.getNumericShaping(paragraphAttrs);
+ if (shaper != null) {
+ shaper.shape(text, 0, text.length);
+ }
+ }
+
+ /*
+ * the fast init generates a single glyph set. This requires:
+ * all one style
+ * all renderable by one font (ie no embedded graphics)
+ * all on one baseline
+ */
+ private void fastInit(char[] chars, Font font,
+ Map<? extends Attribute, ?> attrs,
+ FontRenderContext frc) {
+
+ // Object vf = attrs.get(TextAttribute.ORIENTATION);
+ // isVerticalLine = TextAttribute.ORIENTATION_VERTICAL.equals(vf);
+ isVerticalLine = false;
+
+ LineMetrics lm = font.getLineMetrics(chars, 0, chars.length, frc);
+ CoreMetrics cm = CoreMetrics.get(lm);
+ byte glyphBaseline = (byte) cm.baselineIndex;
+
+ if (attrs == null) {
+ baseline = glyphBaseline;
+ baselineOffsets = cm.baselineOffsets;
+ justifyRatio = 1.0f;
+ } else {
+ paragraphInit(glyphBaseline, cm, attrs, chars);
+ }
+
+ characterCount = chars.length;
+
+ textLine = TextLine.fastCreateTextLine(frc, chars, font, cm, attrs);
+ }
+
+ /*
+ * the standard init generates multiple glyph sets based on style,
+ * renderable, and baseline runs.
+ * @param chars the text in the iterator, extracted into a char array
+ */
+ private void standardInit(AttributedCharacterIterator text, char[] chars, FontRenderContext frc) {
+
+ characterCount = chars.length;
+
+ // set paragraph attributes
+ {
+ // If there's an embedded graphic at the start of the
+ // paragraph, look for the first non-graphic character
+ // and use it and its font to initialize the paragraph.
+ // If not, use the first graphic to initialize.
+
+ Map<? extends Attribute, ?> paragraphAttrs = text.getAttributes();
+
+ boolean haveFont = TextLine.advanceToFirstFont(text);
+
+ if (haveFont) {
+ Font defaultFont = TextLine.getFontAtCurrentPos(text);
+ int charsStart = text.getIndex() - text.getBeginIndex();
+ LineMetrics lm = defaultFont.getLineMetrics(chars, charsStart, charsStart+1, frc);
+ CoreMetrics cm = CoreMetrics.get(lm);
+ paragraphInit((byte)cm.baselineIndex, cm, paragraphAttrs, chars);
+ }
+ else {
+ // hmmm what to do here? Just try to supply reasonable
+ // values I guess.
+
+ GraphicAttribute graphic = (GraphicAttribute)
+ paragraphAttrs.get(TextAttribute.CHAR_REPLACEMENT);
+ byte defaultBaseline = getBaselineFromGraphic(graphic);
+ CoreMetrics cm = GraphicComponent.createCoreMetrics(graphic);
+ paragraphInit(defaultBaseline, cm, paragraphAttrs, chars);
+ }
+ }
+
+ textLine = TextLine.standardCreateTextLine(frc, text, chars, baselineOffsets);
+ }
+
+ /*
+ * A utility to rebuild the ascent/descent/leading/advance cache.
+ * You'll need to call this if you clone and mutate (like justification,
+ * editing methods do)
+ */
+ private void ensureCache() {
+ if (!cacheIsValid) {
+ buildCache();
+ }
+ }
+
+ private void buildCache() {
+ lineMetrics = textLine.getMetrics();
+
+ // compute visibleAdvance
+ if (textLine.isDirectionLTR()) {
+
+ int lastNonSpace = characterCount-1;
+ while (lastNonSpace != -1) {
+ int logIndex = textLine.visualToLogical(lastNonSpace);
+ if (!textLine.isCharSpace(logIndex)) {
+ break;
+ }
+ else {
+ --lastNonSpace;
+ }
+ }
+ if (lastNonSpace == characterCount-1) {
+ visibleAdvance = lineMetrics.advance;
+ }
+ else if (lastNonSpace == -1) {
+ visibleAdvance = 0;
+ }
+ else {
+ int logIndex = textLine.visualToLogical(lastNonSpace);
+ visibleAdvance = textLine.getCharLinePosition(logIndex)
+ + textLine.getCharAdvance(logIndex);
+ }
+ }
+ else {
+
+ int leftmostNonSpace = 0;
+ while (leftmostNonSpace != characterCount) {
+ int logIndex = textLine.visualToLogical(leftmostNonSpace);
+ if (!textLine.isCharSpace(logIndex)) {
+ break;
+ }
+ else {
+ ++leftmostNonSpace;
+ }
+ }
+ if (leftmostNonSpace == characterCount) {
+ visibleAdvance = 0;
+ }
+ else if (leftmostNonSpace == 0) {
+ visibleAdvance = lineMetrics.advance;
+ }
+ else {
+ int logIndex = textLine.visualToLogical(leftmostNonSpace);
+ float pos = textLine.getCharLinePosition(logIndex);
+ visibleAdvance = lineMetrics.advance - pos;
+ }
+ }
+
+ // naturalBounds, boundsRect will be generated on demand
+ naturalBounds = null;
+ boundsRect = null;
+
+ // hashCode will be regenerated on demand
+ hashCodeCache = 0;
+
+ cacheIsValid = true;
+ }
+
+ /**
+ * The 'natural bounds' encloses all the carets the layout can draw.
+ *
+ */
+ private Rectangle2D getNaturalBounds() {
+ ensureCache();
+
+ if (naturalBounds == null) {
+ naturalBounds = textLine.getItalicBounds();
+ }
+
+ return naturalBounds;
+ }
+
+ /**
+ * Creates a copy of this <code>TextLayout</code>.
+ */
+ protected Object clone() {
+ /*
+ * !!! I think this is safe. Once created, nothing mutates the
+ * glyphvectors or arrays. But we need to make sure.
+ * {jbr} actually, that's not quite true. The justification code
+ * mutates after cloning. It doesn't actually change the glyphvectors
+ * (that's impossible) but it replaces them with justified sets. This
+ * is a problem for GlyphIterator creation, since new GlyphIterators
+ * are created by cloning a prototype. If the prototype has outdated
+ * glyphvectors, so will the new ones. A partial solution is to set the
+ * prototypical GlyphIterator to null when the glyphvectors change. If
+ * you forget this one time, you're hosed.
+ */
+ try {
+ return super.clone();
+ }
+ catch (CloneNotSupportedException e) {
+ throw new InternalError(e);
+ }
+ }
+
+ /*
+ * Utility to throw an expection if an invalid TextHitInfo is passed
+ * as a parameter. Avoids code duplication.
+ */
+ private void checkTextHit(TextHitInfo hit) {
+ if (hit == null) {
+ throw new IllegalArgumentException("TextHitInfo is null.");
+ }
+
+ if (hit.getInsertionIndex() < 0 ||
+ hit.getInsertionIndex() > characterCount) {
+ throw new IllegalArgumentException("TextHitInfo is out of range");
+ }
+ }
+
+ /**
+ * Creates a copy of this <code>TextLayout</code> justified to the
+ * specified width.
+ * <p>
+ * If this <code>TextLayout</code> has already been justified, an
+ * exception is thrown. If this <code>TextLayout</code> object's
+ * justification ratio is zero, a <code>TextLayout</code> identical
+ * to this <code>TextLayout</code> is returned.
+ * @param justificationWidth the width to use when justifying the line.
+ * For best results, it should not be too different from the current
+ * advance of the line.
+ * @return a <code>TextLayout</code> justified to the specified width.
+ * @exception Error if this layout has already been justified, an Error is
+ * thrown.
+ */
+ public TextLayout getJustifiedLayout(float justificationWidth) {
+
+ if (justificationWidth <= 0) {
+ throw new IllegalArgumentException("justificationWidth <= 0 passed to TextLayout.getJustifiedLayout()");
+ }
+
+ if (justifyRatio == ALREADY_JUSTIFIED) {
+ throw new Error("Can't justify again.");
+ }
+
+ ensureCache(); // make sure textLine is not null
+
+ // default justification range to exclude trailing logical whitespace
+ int limit = characterCount;
+ while (limit > 0 && textLine.isCharWhitespace(limit-1)) {
+ --limit;
+ }
+
+ TextLine newLine = textLine.getJustifiedLine(justificationWidth, justifyRatio, 0, limit);
+ if (newLine != null) {
+ return new TextLayout(newLine, baseline, baselineOffsets, ALREADY_JUSTIFIED);
+ }
+
+ return this;
+ }
+
+ /**
+ * Justify this layout. Overridden by subclassers to control justification
+ * (if there were subclassers, that is...)
+ *
+ * The layout will only justify if the paragraph attributes (from the
+ * source text, possibly defaulted by the layout attributes) indicate a
+ * non-zero justification ratio. The text will be justified to the
+ * indicated width. The current implementation also adjusts hanging
+ * punctuation and trailing whitespace to overhang the justification width.
+ * Once justified, the layout may not be rejustified.
+ * <p>
+ * Some code may rely on immutablity of layouts. Subclassers should not
+ * call this directly, but instead should call getJustifiedLayout, which
+ * will call this method on a clone of this layout, preserving
+ * the original.
+ *
+ * @param justificationWidth the width to use when justifying the line.
+ * For best results, it should not be too different from the current
+ * advance of the line.
+ * @see #getJustifiedLayout(float)
+ */
+ protected void handleJustify(float justificationWidth) {
+ // never called
+ }
+
+
+ /**
+ * Returns the baseline for this <code>TextLayout</code>.
+ * The baseline is one of the values defined in <code>Font</code>,
+ * which are roman, centered and hanging. Ascent and descent are
+ * relative to this baseline. The <code>baselineOffsets</code>
+ * are also relative to this baseline.
+ * @return the baseline of this <code>TextLayout</code>.
+ * @see #getBaselineOffsets()
+ * @see Font
+ */
+ public byte getBaseline() {
+ return baseline;
+ }
+
+ /**
+ * Returns the offsets array for the baselines used for this
+ * <code>TextLayout</code>.
+ * <p>
+ * The array is indexed by one of the values defined in
+ * <code>Font</code>, which are roman, centered and hanging. The
+ * values are relative to this <code>TextLayout</code> object's
+ * baseline, so that <code>getBaselineOffsets[getBaseline()] == 0</code>.
+ * Offsets are added to the position of the <code>TextLayout</code>
+ * object's baseline to get the position for the new baseline.
+ * @return the offsets array containing the baselines used for this
+ * <code>TextLayout</code>.
+ * @see #getBaseline()
+ * @see Font
+ */
+ public float[] getBaselineOffsets() {
+ float[] offsets = new float[baselineOffsets.length];
+ System.arraycopy(baselineOffsets, 0, offsets, 0, offsets.length);
+ return offsets;
+ }
+
+ /**
+ * Returns the advance of this <code>TextLayout</code>.
+ * The advance is the distance from the origin to the advance of the
+ * rightmost (bottommost) character. This is in baseline-relative
+ * coordinates.
+ * @return the advance of this <code>TextLayout</code>.
+ */
+ public float getAdvance() {
+ ensureCache();
+ return lineMetrics.advance;
+ }
+
+ /**
+ * Returns the advance of this <code>TextLayout</code>, minus trailing
+ * whitespace. This is in baseline-relative coordinates.
+ * @return the advance of this <code>TextLayout</code> without the
+ * trailing whitespace.
+ * @see #getAdvance()
+ */
+ public float getVisibleAdvance() {
+ ensureCache();
+ return visibleAdvance;
+ }
+
+ /**
+ * Returns the ascent of this <code>TextLayout</code>.
+ * The ascent is the distance from the top (right) of the
+ * <code>TextLayout</code> to the baseline. It is always either
+ * positive or zero. The ascent is sufficient to
+ * accommodate superscripted text and is the maximum of the sum of the
+ * ascent, offset, and baseline of each glyph. The ascent is
+ * the maximum ascent from the baseline of all the text in the
+ * TextLayout. It is in baseline-relative coordinates.
+ * @return the ascent of this <code>TextLayout</code>.
+ */
+ public float getAscent() {
+ ensureCache();
+ return lineMetrics.ascent;
+ }
+
+ /**
+ * Returns the descent of this <code>TextLayout</code>.
+ * The descent is the distance from the baseline to the bottom (left) of
+ * the <code>TextLayout</code>. It is always either positive or zero.
+ * The descent is sufficient to accommodate subscripted text and is the
+ * maximum of the sum of the descent, offset, and baseline of each glyph.
+ * This is the maximum descent from the baseline of all the text in
+ * the TextLayout. It is in baseline-relative coordinates.
+ * @return the descent of this <code>TextLayout</code>.
+ */
+ public float getDescent() {
+ ensureCache();
+ return lineMetrics.descent;
+ }
+
+ /**
+ * Returns the leading of the <code>TextLayout</code>.
+ * The leading is the suggested interline spacing for this
+ * <code>TextLayout</code>. This is in baseline-relative
+ * coordinates.
+ * <p>
+ * The leading is computed from the leading, descent, and baseline
+ * of all glyphvectors in the <code>TextLayout</code>. The algorithm
+ * is roughly as follows:
+ * <blockquote><pre>
+ * maxD = 0;
+ * maxDL = 0;
+ * for (GlyphVector g in all glyphvectors) {
+ * maxD = max(maxD, g.getDescent() + offsets[g.getBaseline()]);
+ * maxDL = max(maxDL, g.getDescent() + g.getLeading() +
+ * offsets[g.getBaseline()]);
+ * }
+ * return maxDL - maxD;
+ * </pre></blockquote>
+ * @return the leading of this <code>TextLayout</code>.
+ */
+ public float getLeading() {
+ ensureCache();
+ return lineMetrics.leading;
+ }
+
+ /**
+ * Returns the bounds of this <code>TextLayout</code>.
+ * The bounds are in standard coordinates.
+ * <p>Due to rasterization effects, this bounds might not enclose all of the
+ * pixels rendered by the TextLayout.</p>
+ * It might not coincide exactly with the ascent, descent,
+ * origin or advance of the <code>TextLayout</code>.
+ * @return a {@link Rectangle2D} that is the bounds of this
+ * <code>TextLayout</code>.
+ */
+ public Rectangle2D getBounds() {
+ ensureCache();
+
+ if (boundsRect == null) {
+ Rectangle2D vb = textLine.getVisualBounds();
+ if (dx != 0 || dy != 0) {
+ vb.setRect(vb.getX() - dx,
+ vb.getY() - dy,
+ vb.getWidth(),
+ vb.getHeight());
+ }
+ boundsRect = vb;
+ }
+
+ Rectangle2D bounds = new Rectangle2D.Float();
+ bounds.setRect(boundsRect);
+
+ return bounds;
+ }
+
+ /**
+ * Returns the pixel bounds of this <code>TextLayout</code> when
+ * rendered in a graphics with the given
+ * <code>FontRenderContext</code> at the given location. The
+ * graphics render context need not be the same as the
+ * <code>FontRenderContext</code> used to create this
+ * <code>TextLayout</code>, and can be null. If it is null, the
+ * <code>FontRenderContext</code> of this <code>TextLayout</code>
+ * is used.
+ * @param frc the <code>FontRenderContext</code> of the <code>Graphics</code>.
+ * @param x the x-coordinate at which to render this <code>TextLayout</code>.
+ * @param y the y-coordinate at which to render this <code>TextLayout</code>.
+ * @return a <code>Rectangle</code> bounding the pixels that would be affected.
+ * @see GlyphVector#getPixelBounds
+ * @since 1.6
+ */
+ public Rectangle getPixelBounds(FontRenderContext frc, float x, float y) {
+ return textLine.getPixelBounds(frc, x, y);
+ }
+
+ /**
+ * Returns <code>true</code> if this <code>TextLayout</code> has
+ * a left-to-right base direction or <code>false</code> if it has
+ * a right-to-left base direction. The <code>TextLayout</code>
+ * has a base direction of either left-to-right (LTR) or
+ * right-to-left (RTL). The base direction is independent of the
+ * actual direction of text on the line, which may be either LTR,
+ * RTL, or mixed. Left-to-right layouts by default should position
+ * flush left. If the layout is on a tabbed line, the
+ * tabs run left to right, so that logically successive layouts position
+ * left to right. The opposite is true for RTL layouts. By default they
+ * should position flush left, and tabs run right-to-left.
+ * @return <code>true</code> if the base direction of this
+ * <code>TextLayout</code> is left-to-right; <code>false</code>
+ * otherwise.
+ */
+ public boolean isLeftToRight() {
+ return textLine.isDirectionLTR();
+ }
+
+ /**
+ * Returns <code>true</code> if this <code>TextLayout</code> is vertical.
+ * @return <code>true</code> if this <code>TextLayout</code> is vertical;
+ * <code>false</code> otherwise.
+ */
+ public boolean isVertical() {
+ return isVerticalLine;
+ }
+
+ /**
+ * Returns the number of characters represented by this
+ * <code>TextLayout</code>.
+ * @return the number of characters in this <code>TextLayout</code>.
+ */
+ public int getCharacterCount() {
+ return characterCount;
+ }
+
+ /*
+ * carets and hit testing
+ *
+ * Positions on a text line are represented by instances of TextHitInfo.
+ * Any TextHitInfo with characterOffset between 0 and characterCount-1,
+ * inclusive, represents a valid position on the line. Additionally,
+ * [-1, trailing] and [characterCount, leading] are valid positions, and
+ * represent positions at the logical start and end of the line,
+ * respectively.
+ *
+ * The characterOffsets in TextHitInfo's used and returned by TextLayout
+ * are relative to the beginning of the text layout, not necessarily to
+ * the beginning of the text storage the client is using.
+ *
+ *
+ * Every valid TextHitInfo has either one or two carets associated with it.
+ * A caret is a visual location in the TextLayout indicating where text at
+ * the TextHitInfo will be displayed on screen. If a TextHitInfo
+ * represents a location on a directional boundary, then there are two
+ * possible visible positions for newly inserted text. Consider the
+ * following example, in which capital letters indicate right-to-left text,
+ * and the overall line direction is left-to-right:
+ *
+ * Text Storage: [ a, b, C, D, E, f ]
+ * Display: a b E D C f
+ *
+ * The text hit info (1, t) represents the trailing side of 'b'. If 'q',
+ * a left-to-right character is inserted into the text storage at this
+ * location, it will be displayed between the 'b' and the 'E':
+ *
+ * Text Storage: [ a, b, q, C, D, E, f ]
+ * Display: a b q E D C f
+ *
+ * However, if a 'W', which is right-to-left, is inserted into the storage
+ * after 'b', the storage and display will be:
+ *
+ * Text Storage: [ a, b, W, C, D, E, f ]
+ * Display: a b E D C W f
+ *
+ * So, for the original text storage, two carets should be displayed for
+ * location (1, t): one visually between 'b' and 'E' and one visually
+ * between 'C' and 'f'.
+ *
+ *
+ * When two carets are displayed for a TextHitInfo, one caret is the
+ * 'strong' caret and the other is the 'weak' caret. The strong caret
+ * indicates where an inserted character will be displayed when that
+ * character's direction is the same as the direction of the TextLayout.
+ * The weak caret shows where an character inserted character will be
+ * displayed when the character's direction is opposite that of the
+ * TextLayout.
+ *
+ *
+ * Clients should not be overly concerned with the details of correct
+ * caret display. TextLayout.getCaretShapes(TextHitInfo) will return an
+ * array of two paths representing where carets should be displayed.
+ * The first path in the array is the strong caret; the second element,
+ * if non-null, is the weak caret. If the second element is null,
+ * then there is no weak caret for the given TextHitInfo.
+ *
+ *
+ * Since text can be visually reordered, logically consecutive
+ * TextHitInfo's may not be visually consecutive. One implication of this
+ * is that a client cannot tell from inspecting a TextHitInfo whether the
+ * hit represents the first (or last) caret in the layout. Clients
+ * can call getVisualOtherHit(); if the visual companion is
+ * (-1, TRAILING) or (characterCount, LEADING), then the hit is at the
+ * first (last) caret position in the layout.
+ */
+
+ private float[] getCaretInfo(int caret,
+ Rectangle2D bounds,
+ float[] info) {
+
+ float top1X, top2X;
+ float bottom1X, bottom2X;
+
+ if (caret == 0 || caret == characterCount) {
+
+ float pos;
+ int logIndex;
+ if (caret == characterCount) {
+ logIndex = textLine.visualToLogical(characterCount-1);
+ pos = textLine.getCharLinePosition(logIndex)
+ + textLine.getCharAdvance(logIndex);
+ }
+ else {
+ logIndex = textLine.visualToLogical(caret);
+ pos = textLine.getCharLinePosition(logIndex);
+ }
+ float angle = textLine.getCharAngle(logIndex);
+ float shift = textLine.getCharShift(logIndex);
+ pos += angle * shift;
+ top1X = top2X = pos + angle*textLine.getCharAscent(logIndex);
+ bottom1X = bottom2X = pos - angle*textLine.getCharDescent(logIndex);
+ }
+ else {
+
+ {
+ int logIndex = textLine.visualToLogical(caret-1);
+ float angle1 = textLine.getCharAngle(logIndex);
+ float pos1 = textLine.getCharLinePosition(logIndex)
+ + textLine.getCharAdvance(logIndex);
+ if (angle1 != 0) {
+ pos1 += angle1 * textLine.getCharShift(logIndex);
+ top1X = pos1 + angle1*textLine.getCharAscent(logIndex);
+ bottom1X = pos1 - angle1*textLine.getCharDescent(logIndex);
+ }
+ else {
+ top1X = bottom1X = pos1;
+ }
+ }
+ {
+ int logIndex = textLine.visualToLogical(caret);
+ float angle2 = textLine.getCharAngle(logIndex);
+ float pos2 = textLine.getCharLinePosition(logIndex);
+ if (angle2 != 0) {
+ pos2 += angle2*textLine.getCharShift(logIndex);
+ top2X = pos2 + angle2*textLine.getCharAscent(logIndex);
+ bottom2X = pos2 - angle2*textLine.getCharDescent(logIndex);
+ }
+ else {
+ top2X = bottom2X = pos2;
+ }
+ }
+ }
+
+ float topX = (top1X + top2X) / 2;
+ float bottomX = (bottom1X + bottom2X) / 2;
+
+ if (info == null) {
+ info = new float[2];
+ }
+
+ if (isVerticalLine) {
+ info[1] = (float) ((topX - bottomX) / bounds.getWidth());
+ info[0] = (float) (topX + (info[1]*bounds.getX()));
+ }
+ else {
+ info[1] = (float) ((topX - bottomX) / bounds.getHeight());
+ info[0] = (float) (bottomX + (info[1]*bounds.getMaxY()));
+ }
+
+ return info;
+ }
+
+ /**
+ * Returns information about the caret corresponding to <code>hit</code>.
+ * The first element of the array is the intersection of the caret with
+ * the baseline, as a distance along the baseline. The second element
+ * of the array is the inverse slope (run/rise) of the caret, measured
+ * with respect to the baseline at that point.
+ * <p>
+ * This method is meant for informational use. To display carets, it
+ * is better to use <code>getCaretShapes</code>.
+ * @param hit a hit on a character in this <code>TextLayout</code>
+ * @param bounds the bounds to which the caret info is constructed.
+ * The bounds is in baseline-relative coordinates.
+ * @return a two-element array containing the position and slope of
+ * the caret. The returned caret info is in baseline-relative coordinates.
+ * @see #getCaretShapes(int, Rectangle2D, TextLayout.CaretPolicy)
+ * @see Font#getItalicAngle
+ */
+ public float[] getCaretInfo(TextHitInfo hit, Rectangle2D bounds) {
+ ensureCache();
+ checkTextHit(hit);
+
+ return getCaretInfoTestInternal(hit, bounds);
+ }
+
+ // this version provides extra info in the float array
+ // the first two values are as above
+ // the next four values are the endpoints of the caret, as computed
+ // using the hit character's offset (baseline + ssoffset) and
+ // natural ascent and descent.
+ // these values are trimmed to the bounds where required to fit,
+ // but otherwise independent of it.
+ private float[] getCaretInfoTestInternal(TextHitInfo hit, Rectangle2D bounds) {
+ ensureCache();
+ checkTextHit(hit);
+
+ float[] info = new float[6];
+
+ // get old data first
+ getCaretInfo(hitToCaret(hit), bounds, info);
+
+ // then add our new data
+ double iangle, ixbase, p1x, p1y, p2x, p2y;
+
+ int charix = hit.getCharIndex();
+ boolean lead = hit.isLeadingEdge();
+ boolean ltr = textLine.isDirectionLTR();
+ boolean horiz = !isVertical();
+
+ if (charix == -1 || charix == characterCount) {
+ // !!! note: want non-shifted, baseline ascent and descent here!
+ // TextLine should return appropriate line metrics object for these values
+ TextLineMetrics m = textLine.getMetrics();
+ boolean low = ltr == (charix == -1);
+ iangle = 0;
+ if (horiz) {
+ p1x = p2x = low ? 0 : m.advance;
+ p1y = -m.ascent;
+ p2y = m.descent;
+ } else {
+ p1y = p2y = low ? 0 : m.advance;
+ p1x = m.descent;
+ p2x = m.ascent;
+ }
+ } else {
+ CoreMetrics thiscm = textLine.getCoreMetricsAt(charix);
+ iangle = thiscm.italicAngle;
+ ixbase = textLine.getCharLinePosition(charix, lead);
+ if (thiscm.baselineIndex < 0) {
+ // this is a graphic, no italics, use entire line height for caret
+ TextLineMetrics m = textLine.getMetrics();
+ if (horiz) {
+ p1x = p2x = ixbase;
+ if (thiscm.baselineIndex == GraphicAttribute.TOP_ALIGNMENT) {
+ p1y = -m.ascent;
+ p2y = p1y + thiscm.height;
+ } else {
+ p2y = m.descent;
+ p1y = p2y - thiscm.height;
+ }
+ } else {
+ p1y = p2y = ixbase;
+ p1x = m.descent;
+ p2x = m.ascent;
+ // !!! top/bottom adjustment not implemented for vertical
+ }
+ } else {
+ float bo = baselineOffsets[thiscm.baselineIndex];
+ if (horiz) {
+ ixbase += iangle * thiscm.ssOffset;
+ p1x = ixbase + iangle * thiscm.ascent;
+ p2x = ixbase - iangle * thiscm.descent;
+ p1y = bo - thiscm.ascent;
+ p2y = bo + thiscm.descent;
+ } else {
+ ixbase -= iangle * thiscm.ssOffset;
+ p1y = ixbase + iangle * thiscm.ascent;
+ p2y = ixbase - iangle * thiscm.descent;
+ p1x = bo + thiscm.ascent;
+ p2x = bo + thiscm.descent;
+ }
+ }
+ }
+
+ info[2] = (float)p1x;
+ info[3] = (float)p1y;
+ info[4] = (float)p2x;
+ info[5] = (float)p2y;
+
+ return info;
+ }
+
+ /**
+ * Returns information about the caret corresponding to <code>hit</code>.
+ * This method is a convenience overload of <code>getCaretInfo</code> and
+ * uses the natural bounds of this <code>TextLayout</code>.
+ * @param hit a hit on a character in this <code>TextLayout</code>
+ * @return the information about a caret corresponding to a hit. The
+ * returned caret info is in baseline-relative coordinates.
+ */
+ public float[] getCaretInfo(TextHitInfo hit) {
+
+ return getCaretInfo(hit, getNaturalBounds());
+ }
+
+ /**
+ * Returns a caret index corresponding to <code>hit</code>.
+ * Carets are numbered from left to right (top to bottom) starting from
+ * zero. This always places carets next to the character hit, on the
+ * indicated side of the character.
+ * @param hit a hit on a character in this <code>TextLayout</code>
+ * @return a caret index corresponding to the specified hit.
+ */
+ private int hitToCaret(TextHitInfo hit) {
+
+ int hitIndex = hit.getCharIndex();
+
+ if (hitIndex < 0) {
+ return textLine.isDirectionLTR() ? 0 : characterCount;
+ } else if (hitIndex >= characterCount) {
+ return textLine.isDirectionLTR() ? characterCount : 0;
+ }
+
+ int visIndex = textLine.logicalToVisual(hitIndex);
+
+ if (hit.isLeadingEdge() != textLine.isCharLTR(hitIndex)) {
+ ++visIndex;
+ }
+
+ return visIndex;
+ }
+
+ /**
+ * Given a caret index, return a hit whose caret is at the index.
+ * The hit is NOT guaranteed to be strong!!!
+ *
+ * @param caret a caret index.
+ * @return a hit on this layout whose strong caret is at the requested
+ * index.
+ */
+ private TextHitInfo caretToHit(int caret) {
+
+ if (caret == 0 || caret == characterCount) {
+
+ if ((caret == characterCount) == textLine.isDirectionLTR()) {
+ return TextHitInfo.leading(characterCount);
+ }
+ else {
+ return TextHitInfo.trailing(-1);
+ }
+ }
+ else {
+
+ int charIndex = textLine.visualToLogical(caret);
+ boolean leading = textLine.isCharLTR(charIndex);
+
+ return leading? TextHitInfo.leading(charIndex)
+ : TextHitInfo.trailing(charIndex);
+ }
+ }
+
+ private boolean caretIsValid(int caret) {
+
+ if (caret == characterCount || caret == 0) {
+ return true;
+ }
+
+ int offset = textLine.visualToLogical(caret);
+
+ if (!textLine.isCharLTR(offset)) {
+ offset = textLine.visualToLogical(caret-1);
+ if (textLine.isCharLTR(offset)) {
+ return true;
+ }
+ }
+
+ // At this point, the leading edge of the character
+ // at offset is at the given caret.
+
+ return textLine.caretAtOffsetIsValid(offset);
+ }
+
+ /**
+ * Returns the hit for the next caret to the right (bottom); if there
+ * is no such hit, returns <code>null</code>.
+ * If the hit character index is out of bounds, an
+ * {@link IllegalArgumentException} is thrown.
+ * @param hit a hit on a character in this layout
+ * @return a hit whose caret appears at the next position to the
+ * right (bottom) of the caret of the provided hit or <code>null</code>.
+ */
+ public TextHitInfo getNextRightHit(TextHitInfo hit) {
+ ensureCache();
+ checkTextHit(hit);
+
+ int caret = hitToCaret(hit);
+
+ if (caret == characterCount) {
+ return null;
+ }
+
+ do {
+ ++caret;
+ } while (!caretIsValid(caret));
+
+ return caretToHit(caret);
+ }
+
+ /**
+ * Returns the hit for the next caret to the right (bottom); if no
+ * such hit, returns <code>null</code>. The hit is to the right of
+ * the strong caret at the specified offset, as determined by the
+ * specified policy.
+ * The returned hit is the stronger of the two possible
+ * hits, as determined by the specified policy.
+ * @param offset an insertion offset in this <code>TextLayout</code>.
+ * Cannot be less than 0 or greater than this <code>TextLayout</code>
+ * object's character count.
+ * @param policy the policy used to select the strong caret
+ * @return a hit whose caret appears at the next position to the
+ * right (bottom) of the caret of the provided hit, or <code>null</code>.
+ */
+ public TextHitInfo getNextRightHit(int offset, CaretPolicy policy) {
+
+ if (offset < 0 || offset > characterCount) {
+ throw new IllegalArgumentException("Offset out of bounds in TextLayout.getNextRightHit()");
+ }
+
+ if (policy == null) {
+ throw new IllegalArgumentException("Null CaretPolicy passed to TextLayout.getNextRightHit()");
+ }
+
+ TextHitInfo hit1 = TextHitInfo.afterOffset(offset);
+ TextHitInfo hit2 = hit1.getOtherHit();
+
+ TextHitInfo nextHit = getNextRightHit(policy.getStrongCaret(hit1, hit2, this));
+
+ if (nextHit != null) {
+ TextHitInfo otherHit = getVisualOtherHit(nextHit);
+ return policy.getStrongCaret(otherHit, nextHit, this);
+ }
+ else {
+ return null;
+ }
+ }
+
+ /**
+ * Returns the hit for the next caret to the right (bottom); if no
+ * such hit, returns <code>null</code>. The hit is to the right of
+ * the strong caret at the specified offset, as determined by the
+ * default policy.
+ * The returned hit is the stronger of the two possible
+ * hits, as determined by the default policy.
+ * @param offset an insertion offset in this <code>TextLayout</code>.
+ * Cannot be less than 0 or greater than the <code>TextLayout</code>
+ * object's character count.
+ * @return a hit whose caret appears at the next position to the
+ * right (bottom) of the caret of the provided hit, or <code>null</code>.
+ */
+ public TextHitInfo getNextRightHit(int offset) {
+
+ return getNextRightHit(offset, DEFAULT_CARET_POLICY);
+ }
+
+ /**
+ * Returns the hit for the next caret to the left (top); if no such
+ * hit, returns <code>null</code>.
+ * If the hit character index is out of bounds, an
+ * <code>IllegalArgumentException</code> is thrown.
+ * @param hit a hit on a character in this <code>TextLayout</code>.
+ * @return a hit whose caret appears at the next position to the
+ * left (top) of the caret of the provided hit, or <code>null</code>.
+ */
+ public TextHitInfo getNextLeftHit(TextHitInfo hit) {
+ ensureCache();
+ checkTextHit(hit);
+
+ int caret = hitToCaret(hit);
+
+ if (caret == 0) {
+ return null;
+ }
+
+ do {
+ --caret;
+ } while(!caretIsValid(caret));
+
+ return caretToHit(caret);
+ }
+
+ /**
+ * Returns the hit for the next caret to the left (top); if no
+ * such hit, returns <code>null</code>. The hit is to the left of
+ * the strong caret at the specified offset, as determined by the
+ * specified policy.
+ * The returned hit is the stronger of the two possible
+ * hits, as determined by the specified policy.
+ * @param offset an insertion offset in this <code>TextLayout</code>.
+ * Cannot be less than 0 or greater than this <code>TextLayout</code>
+ * object's character count.
+ * @param policy the policy used to select the strong caret
+ * @return a hit whose caret appears at the next position to the
+ * left (top) of the caret of the provided hit, or <code>null</code>.
+ */
+ public TextHitInfo getNextLeftHit(int offset, CaretPolicy policy) {
+
+ if (policy == null) {
+ throw new IllegalArgumentException("Null CaretPolicy passed to TextLayout.getNextLeftHit()");
+ }
+
+ if (offset < 0 || offset > characterCount) {
+ throw new IllegalArgumentException("Offset out of bounds in TextLayout.getNextLeftHit()");
+ }
+
+ TextHitInfo hit1 = TextHitInfo.afterOffset(offset);
+ TextHitInfo hit2 = hit1.getOtherHit();
+
+ TextHitInfo nextHit = getNextLeftHit(policy.getStrongCaret(hit1, hit2, this));
+
+ if (nextHit != null) {
+ TextHitInfo otherHit = getVisualOtherHit(nextHit);
+ return policy.getStrongCaret(otherHit, nextHit, this);
+ }
+ else {
+ return null;
+ }
+ }
+
+ /**
+ * Returns the hit for the next caret to the left (top); if no
+ * such hit, returns <code>null</code>. The hit is to the left of
+ * the strong caret at the specified offset, as determined by the
+ * default policy.
+ * The returned hit is the stronger of the two possible
+ * hits, as determined by the default policy.
+ * @param offset an insertion offset in this <code>TextLayout</code>.
+ * Cannot be less than 0 or greater than this <code>TextLayout</code>
+ * object's character count.
+ * @return a hit whose caret appears at the next position to the
+ * left (top) of the caret of the provided hit, or <code>null</code>.
+ */
+ public TextHitInfo getNextLeftHit(int offset) {
+
+ return getNextLeftHit(offset, DEFAULT_CARET_POLICY);
+ }
+
+ /**
+ * Returns the hit on the opposite side of the specified hit's caret.
+ * @param hit the specified hit
+ * @return a hit that is on the opposite side of the specified hit's
+ * caret.
+ */
+ public TextHitInfo getVisualOtherHit(TextHitInfo hit) {
+
+ ensureCache();
+ checkTextHit(hit);
+
+ int hitCharIndex = hit.getCharIndex();
+
+ int charIndex;
+ boolean leading;
+
+ if (hitCharIndex == -1 || hitCharIndex == characterCount) {
+
+ int visIndex;
+ if (textLine.isDirectionLTR() == (hitCharIndex == -1)) {
+ visIndex = 0;
+ }
+ else {
+ visIndex = characterCount-1;
+ }
+
+ charIndex = textLine.visualToLogical(visIndex);
+
+ if (textLine.isDirectionLTR() == (hitCharIndex == -1)) {
+ // at left end
+ leading = textLine.isCharLTR(charIndex);
+ }
+ else {
+ // at right end
+ leading = !textLine.isCharLTR(charIndex);
+ }
+ }
+ else {
+
+ int visIndex = textLine.logicalToVisual(hitCharIndex);
+
+ boolean movedToRight;
+ if (textLine.isCharLTR(hitCharIndex) == hit.isLeadingEdge()) {
+ --visIndex;
+ movedToRight = false;
+ }
+ else {
+ ++visIndex;
+ movedToRight = true;
+ }
+
+ if (visIndex > -1 && visIndex < characterCount) {
+ charIndex = textLine.visualToLogical(visIndex);
+ leading = movedToRight == textLine.isCharLTR(charIndex);
+ }
+ else {
+ charIndex =
+ (movedToRight == textLine.isDirectionLTR())? characterCount : -1;
+ leading = charIndex == characterCount;
+ }
+ }
+
+ return leading? TextHitInfo.leading(charIndex) :
+ TextHitInfo.trailing(charIndex);
+ }
+
+ private double[] getCaretPath(TextHitInfo hit, Rectangle2D bounds) {
+ float[] info = getCaretInfo(hit, bounds);
+ return new double[] { info[2], info[3], info[4], info[5] };
+ }
+
+ /**
+ * Return an array of four floats corresponding the endpoints of the caret
+ * x0, y0, x1, y1.
+ *
+ * This creates a line along the slope of the caret intersecting the
+ * baseline at the caret
+ * position, and extending from ascent above the baseline to descent below
+ * it.
+ */
+ private double[] getCaretPath(int caret, Rectangle2D bounds,
+ boolean clipToBounds) {
+
+ float[] info = getCaretInfo(caret, bounds, null);
+
+ double pos = info[0];
+ double slope = info[1];
+
+ double x0, y0, x1, y1;
+ double x2 = -3141.59, y2 = -2.7; // values are there to make compiler happy
+
+ double left = bounds.getX();
+ double right = left + bounds.getWidth();
+ double top = bounds.getY();
+ double bottom = top + bounds.getHeight();
+
+ boolean threePoints = false;
+
+ if (isVerticalLine) {
+
+ if (slope >= 0) {
+ x0 = left;
+ x1 = right;
+ }
+ else {
+ x1 = left;
+ x0 = right;
+ }
+
+ y0 = pos + x0 * slope;
+ y1 = pos + x1 * slope;
+
+ // y0 <= y1, always
+
+ if (clipToBounds) {
+ if (y0 < top) {
+ if (slope <= 0 || y1 <= top) {
+ y0 = y1 = top;
+ }
+ else {
+ threePoints = true;
+ y0 = top;
+ y2 = top;
+ x2 = x1 + (top-y1)/slope;
+ if (y1 > bottom) {
+ y1 = bottom;
+ }
+ }
+ }
+ else if (y1 > bottom) {
+ if (slope >= 0 || y0 >= bottom) {
+ y0 = y1 = bottom;
+ }
+ else {
+ threePoints = true;
+ y1 = bottom;
+ y2 = bottom;
+ x2 = x0 + (bottom-x1)/slope;
+ }
+ }
+ }
+
+ }
+ else {
+
+ if (slope >= 0) {
+ y0 = bottom;
+ y1 = top;
+ }
+ else {
+ y1 = bottom;
+ y0 = top;
+ }
+
+ x0 = pos - y0 * slope;
+ x1 = pos - y1 * slope;
+
+ // x0 <= x1, always
+
+ if (clipToBounds) {
+ if (x0 < left) {
+ if (slope <= 0 || x1 <= left) {
+ x0 = x1 = left;
+ }
+ else {
+ threePoints = true;
+ x0 = left;
+ x2 = left;
+ y2 = y1 - (left-x1)/slope;
+ if (x1 > right) {
+ x1 = right;
+ }
+ }
+ }
+ else if (x1 > right) {
+ if (slope >= 0 || x0 >= right) {
+ x0 = x1 = right;
+ }
+ else {
+ threePoints = true;
+ x1 = right;
+ x2 = right;
+ y2 = y0 - (right-x0)/slope;
+ }
+ }
+ }
+ }
+
+ return threePoints?
+ new double[] { x0, y0, x2, y2, x1, y1 } :
+ new double[] { x0, y0, x1, y1 };
+ }
+
+
+ private static GeneralPath pathToShape(double[] path, boolean close, LayoutPathImpl lp) {
+ GeneralPath result = new GeneralPath(GeneralPath.WIND_EVEN_ODD, path.length);
+ result.moveTo((float)path[0], (float)path[1]);
+ for (int i = 2; i < path.length; i += 2) {
+ result.lineTo((float)path[i], (float)path[i+1]);
+ }
+ if (close) {
+ result.closePath();
+ }
+
+ if (lp != null) {
+ result = (GeneralPath)lp.mapShape(result);
+ }
+ return result;
+ }
+
+ /**
+ * Returns a {@link Shape} representing the caret at the specified
+ * hit inside the specified bounds.
+ * @param hit the hit at which to generate the caret
+ * @param bounds the bounds of the <code>TextLayout</code> to use
+ * in generating the caret. The bounds is in baseline-relative
+ * coordinates.
+ * @return a <code>Shape</code> representing the caret. The returned
+ * shape is in standard coordinates.
+ */
+ public Shape getCaretShape(TextHitInfo hit, Rectangle2D bounds) {
+ ensureCache();
+ checkTextHit(hit);
+
+ if (bounds == null) {
+ throw new IllegalArgumentException("Null Rectangle2D passed to TextLayout.getCaret()");
+ }
+
+ return pathToShape(getCaretPath(hit, bounds), false, textLine.getLayoutPath());
+ }
+
+ /**
+ * Returns a <code>Shape</code> representing the caret at the specified
+ * hit inside the natural bounds of this <code>TextLayout</code>.
+ * @param hit the hit at which to generate the caret
+ * @return a <code>Shape</code> representing the caret. The returned
+ * shape is in standard coordinates.
+ */
+ public Shape getCaretShape(TextHitInfo hit) {
+
+ return getCaretShape(hit, getNaturalBounds());
+ }
+
+ /**
+ * Return the "stronger" of the TextHitInfos. The TextHitInfos
+ * should be logical or visual counterparts. They are not
+ * checked for validity.
+ */
+ private final TextHitInfo getStrongHit(TextHitInfo hit1, TextHitInfo hit2) {
+
+ // right now we're using the following rule for strong hits:
+ // A hit on a character with a lower level
+ // is stronger than one on a character with a higher level.
+ // If this rule ties, the hit on the leading edge of a character wins.
+ // If THIS rule ties, hit1 wins. Both rules shouldn't tie, unless the
+ // infos aren't counterparts of some sort.
+
+ byte hit1Level = getCharacterLevel(hit1.getCharIndex());
+ byte hit2Level = getCharacterLevel(hit2.getCharIndex());
+
+ if (hit1Level == hit2Level) {
+ if (hit2.isLeadingEdge() && !hit1.isLeadingEdge()) {
+ return hit2;
+ }
+ else {
+ return hit1;
+ }
+ }
+ else {
+ return (hit1Level < hit2Level)? hit1 : hit2;
+ }
+ }
+
+ /**
+ * Returns the level of the character at <code>index</code>.
+ * Indices -1 and <code>characterCount</code> are assigned the base
+ * level of this <code>TextLayout</code>.
+ * @param index the index of the character from which to get the level
+ * @return the level of the character at the specified index.
+ */
+ public byte getCharacterLevel(int index) {
+
+ // hmm, allow indices at endpoints? For now, yes.
+ if (index < -1 || index > characterCount) {
+ throw new IllegalArgumentException("Index is out of range in getCharacterLevel.");
+ }
+
+ ensureCache();
+ if (index == -1 || index == characterCount) {
+ return (byte) (textLine.isDirectionLTR()? 0 : 1);
+ }
+
+ return textLine.getCharLevel(index);
+ }
+
+ /**
+ * Returns two paths corresponding to the strong and weak caret.
+ * @param offset an offset in this <code>TextLayout</code>
+ * @param bounds the bounds to which to extend the carets. The
+ * bounds is in baseline-relative coordinates.
+ * @param policy the specified <code>CaretPolicy</code>
+ * @return an array of two paths. Element zero is the strong
+ * caret. If there are two carets, element one is the weak caret,
+ * otherwise it is <code>null</code>. The returned shapes
+ * are in standard coordinates.
+ */
+ public Shape[] getCaretShapes(int offset, Rectangle2D bounds, CaretPolicy policy) {
+
+ ensureCache();
+
+ if (offset < 0 || offset > characterCount) {
+ throw new IllegalArgumentException("Offset out of bounds in TextLayout.getCaretShapes()");
+ }
+
+ if (bounds == null) {
+ throw new IllegalArgumentException("Null Rectangle2D passed to TextLayout.getCaretShapes()");
+ }
+
+ if (policy == null) {
+ throw new IllegalArgumentException("Null CaretPolicy passed to TextLayout.getCaretShapes()");
+ }
+
+ Shape[] result = new Shape[2];
+
+ TextHitInfo hit = TextHitInfo.afterOffset(offset);
+
+ int hitCaret = hitToCaret(hit);
+
+ LayoutPathImpl lp = textLine.getLayoutPath();
+ Shape hitShape = pathToShape(getCaretPath(hit, bounds), false, lp);
+ TextHitInfo otherHit = hit.getOtherHit();
+ int otherCaret = hitToCaret(otherHit);
+
+ if (hitCaret == otherCaret) {
+ result[0] = hitShape;
+ }
+ else { // more than one caret
+ Shape otherShape = pathToShape(getCaretPath(otherHit, bounds), false, lp);
+
+ TextHitInfo strongHit = policy.getStrongCaret(hit, otherHit, this);
+ boolean hitIsStrong = strongHit.equals(hit);
+
+ if (hitIsStrong) {// then other is weak
+ result[0] = hitShape;
+ result[1] = otherShape;
+ }
+ else {
+ result[0] = otherShape;
+ result[1] = hitShape;
+ }
+ }
+
+ return result;
+ }
+
+ /**
+ * Returns two paths corresponding to the strong and weak caret.
+ * This method is a convenience overload of <code>getCaretShapes</code>
+ * that uses the default caret policy.
+ * @param offset an offset in this <code>TextLayout</code>
+ * @param bounds the bounds to which to extend the carets. This is
+ * in baseline-relative coordinates.
+ * @return two paths corresponding to the strong and weak caret as
+ * defined by the <code>DEFAULT_CARET_POLICY</code>. These are
+ * in standard coordinates.
+ */
+ public Shape[] getCaretShapes(int offset, Rectangle2D bounds) {
+ // {sfb} parameter checking is done in overloaded version
+ return getCaretShapes(offset, bounds, DEFAULT_CARET_POLICY);
+ }
+
+ /**
+ * Returns two paths corresponding to the strong and weak caret.
+ * This method is a convenience overload of <code>getCaretShapes</code>
+ * that uses the default caret policy and this <code>TextLayout</code>
+ * object's natural bounds.
+ * @param offset an offset in this <code>TextLayout</code>
+ * @return two paths corresponding to the strong and weak caret as
+ * defined by the <code>DEFAULT_CARET_POLICY</code>. These are
+ * in standard coordinates.
+ */
+ public Shape[] getCaretShapes(int offset) {
+ // {sfb} parameter checking is done in overloaded version
+ return getCaretShapes(offset, getNaturalBounds(), DEFAULT_CARET_POLICY);
+ }
+
+ // A utility to return a path enclosing the given path
+ // Path0 must be left or top of path1
+ // {jbr} no assumptions about size of path0, path1 anymore.
+ private GeneralPath boundingShape(double[] path0, double[] path1) {
+
+ // Really, we want the path to be a convex hull around all of the
+ // points in path0 and path1. But we can get by with less than
+ // that. We do need to prevent the two segments which
+ // join path0 to path1 from crossing each other. So, if we
+ // traverse path0 from top to bottom, we'll traverse path1 from
+ // bottom to top (and vice versa).
+
+ GeneralPath result = pathToShape(path0, false, null);
+
+ boolean sameDirection;
+
+ if (isVerticalLine) {
+ sameDirection = (path0[1] > path0[path0.length-1]) ==
+ (path1[1] > path1[path1.length-1]);
+ }
+ else {
+ sameDirection = (path0[0] > path0[path0.length-2]) ==
+ (path1[0] > path1[path1.length-2]);
+ }
+
+ int start;
+ int limit;
+ int increment;
+
+ if (sameDirection) {
+ start = path1.length-2;
+ limit = -2;
+ increment = -2;
+ }
+ else {
+ start = 0;
+ limit = path1.length;
+ increment = 2;
+ }
+
+ for (int i = start; i != limit; i += increment) {
+ result.lineTo((float)path1[i], (float)path1[i+1]);
+ }
+
+ result.closePath();
+
+ return result;
+ }
+
+ // A utility to convert a pair of carets into a bounding path
+ // {jbr} Shape is never outside of bounds.
+ private GeneralPath caretBoundingShape(int caret0,
+ int caret1,
+ Rectangle2D bounds) {
+
+ if (caret0 > caret1) {
+ int temp = caret0;
+ caret0 = caret1;
+ caret1 = temp;
+ }
+
+ return boundingShape(getCaretPath(caret0, bounds, true),
+ getCaretPath(caret1, bounds, true));
+ }
+
+ /*
+ * A utility to return the path bounding the area to the left (top) of the
+ * layout.
+ * Shape is never outside of bounds.
+ */
+ private GeneralPath leftShape(Rectangle2D bounds) {
+
+ double[] path0;
+ if (isVerticalLine) {
+ path0 = new double[] { bounds.getX(), bounds.getY(),
+ bounds.getX() + bounds.getWidth(),
+ bounds.getY() };
+ } else {
+ path0 = new double[] { bounds.getX(),
+ bounds.getY() + bounds.getHeight(),
+ bounds.getX(), bounds.getY() };
+ }
+
+ double[] path1 = getCaretPath(0, bounds, true);
+
+ return boundingShape(path0, path1);
+ }
+
+ /*
+ * A utility to return the path bounding the area to the right (bottom) of
+ * the layout.
+ */
+ private GeneralPath rightShape(Rectangle2D bounds) {
+ double[] path1;
+ if (isVerticalLine) {
+ path1 = new double[] {
+ bounds.getX(),
+ bounds.getY() + bounds.getHeight(),
+ bounds.getX() + bounds.getWidth(),
+ bounds.getY() + bounds.getHeight()
+ };
+ } else {
+ path1 = new double[] {
+ bounds.getX() + bounds.getWidth(),
+ bounds.getY() + bounds.getHeight(),
+ bounds.getX() + bounds.getWidth(),
+ bounds.getY()
+ };
+ }
+
+ double[] path0 = getCaretPath(characterCount, bounds, true);
+
+ return boundingShape(path0, path1);
+ }
+
+ /**
+ * Returns the logical ranges of text corresponding to a visual selection.
+ * @param firstEndpoint an endpoint of the visual range
+ * @param secondEndpoint the other endpoint of the visual range.
+ * This endpoint can be less than <code>firstEndpoint</code>.
+ * @return an array of integers representing start/limit pairs for the
+ * selected ranges.
+ * @see #getVisualHighlightShape(TextHitInfo, TextHitInfo, Rectangle2D)
+ */
+ public int[] getLogicalRangesForVisualSelection(TextHitInfo firstEndpoint,
+ TextHitInfo secondEndpoint) {
+ ensureCache();
+
+ checkTextHit(firstEndpoint);
+ checkTextHit(secondEndpoint);
+
+ // !!! probably want to optimize for all LTR text
+
+ boolean[] included = new boolean[characterCount];
+
+ int startIndex = hitToCaret(firstEndpoint);
+ int limitIndex = hitToCaret(secondEndpoint);
+
+ if (startIndex > limitIndex) {
+ int t = startIndex;
+ startIndex = limitIndex;
+ limitIndex = t;
+ }
+
+ /*
+ * now we have the visual indexes of the glyphs at the start and limit
+ * of the selection range walk through runs marking characters that
+ * were included in the visual range there is probably a more efficient
+ * way to do this, but this ought to work, so hey
+ */
+
+ if (startIndex < limitIndex) {
+ int visIndex = startIndex;
+ while (visIndex < limitIndex) {
+ included[textLine.visualToLogical(visIndex)] = true;
+ ++visIndex;
+ }
+ }
+
+ /*
+ * count how many runs we have, ought to be one or two, but perhaps
+ * things are especially weird
+ */
+ int count = 0;
+ boolean inrun = false;
+ for (int i = 0; i < characterCount; i++) {
+ if (included[i] != inrun) {
+ inrun = !inrun;
+ if (inrun) {
+ count++;
+ }
+ }
+ }
+
+ int[] ranges = new int[count * 2];
+ count = 0;
+ inrun = false;
+ for (int i = 0; i < characterCount; i++) {
+ if (included[i] != inrun) {
+ ranges[count++] = i;
+ inrun = !inrun;
+ }
+ }
+ if (inrun) {
+ ranges[count++] = characterCount;
+ }
+
+ return ranges;
+ }
+
+ /**
+ * Returns a path enclosing the visual selection in the specified range,
+ * extended to <code>bounds</code>.
+ * <p>
+ * If the selection includes the leftmost (topmost) position, the selection
+ * is extended to the left (top) of <code>bounds</code>. If the
+ * selection includes the rightmost (bottommost) position, the selection
+ * is extended to the right (bottom) of the bounds. The height
+ * (width on vertical lines) of the selection is always extended to
+ * <code>bounds</code>.
+ * <p>
+ * Although the selection is always contiguous, the logically selected
+ * text can be discontiguous on lines with mixed-direction text. The
+ * logical ranges of text selected can be retrieved using
+ * <code>getLogicalRangesForVisualSelection</code>. For example,
+ * consider the text 'ABCdef' where capital letters indicate
+ * right-to-left text, rendered on a right-to-left line, with a visual
+ * selection from 0L (the leading edge of 'A') to 3T (the trailing edge
+ * of 'd'). The text appears as follows, with bold underlined areas
+ * representing the selection:
+ * <br><pre>
+ * d<u><b>efCBA </b></u>
+ * </pre>
+ * The logical selection ranges are 0-3, 4-6 (ABC, ef) because the
+ * visually contiguous text is logically discontiguous. Also note that
+ * since the rightmost position on the layout (to the right of 'A') is
+ * selected, the selection is extended to the right of the bounds.
+ * @param firstEndpoint one end of the visual selection
+ * @param secondEndpoint the other end of the visual selection
+ * @param bounds the bounding rectangle to which to extend the selection.
+ * This is in baseline-relative coordinates.
+ * @return a <code>Shape</code> enclosing the selection. This is in
+ * standard coordinates.
+ * @see #getLogicalRangesForVisualSelection(TextHitInfo, TextHitInfo)
+ * @see #getLogicalHighlightShape(int, int, Rectangle2D)
+ */
+ public Shape getVisualHighlightShape(TextHitInfo firstEndpoint,
+ TextHitInfo secondEndpoint,
+ Rectangle2D bounds)
+ {
+ ensureCache();
+
+ checkTextHit(firstEndpoint);
+ checkTextHit(secondEndpoint);
+
+ if(bounds == null) {
+ throw new IllegalArgumentException("Null Rectangle2D passed to TextLayout.getVisualHighlightShape()");
+ }
+
+ GeneralPath result = new GeneralPath(GeneralPath.WIND_EVEN_ODD);
+
+ int firstCaret = hitToCaret(firstEndpoint);
+ int secondCaret = hitToCaret(secondEndpoint);
+
+ result.append(caretBoundingShape(firstCaret, secondCaret, bounds),
+ false);
+
+ if (firstCaret == 0 || secondCaret == 0) {
+ GeneralPath ls = leftShape(bounds);
+ if (!ls.getBounds().isEmpty())
+ result.append(ls, false);
+ }
+
+ if (firstCaret == characterCount || secondCaret == characterCount) {
+ GeneralPath rs = rightShape(bounds);
+ if (!rs.getBounds().isEmpty()) {
+ result.append(rs, false);
+ }
+ }
+
+ LayoutPathImpl lp = textLine.getLayoutPath();
+ if (lp != null) {
+ result = (GeneralPath)lp.mapShape(result); // dlf cast safe?
+ }
+
+ return result;
+ }
+
+ /**
+ * Returns a <code>Shape</code> enclosing the visual selection in the
+ * specified range, extended to the bounds. This method is a
+ * convenience overload of <code>getVisualHighlightShape</code> that
+ * uses the natural bounds of this <code>TextLayout</code>.
+ * @param firstEndpoint one end of the visual selection
+ * @param secondEndpoint the other end of the visual selection
+ * @return a <code>Shape</code> enclosing the selection. This is
+ * in standard coordinates.
+ */
+ public Shape getVisualHighlightShape(TextHitInfo firstEndpoint,
+ TextHitInfo secondEndpoint) {
+ return getVisualHighlightShape(firstEndpoint, secondEndpoint, getNaturalBounds());
+ }
+
+ /**
+ * Returns a <code>Shape</code> enclosing the logical selection in the
+ * specified range, extended to the specified <code>bounds</code>.
+ * <p>
+ * If the selection range includes the first logical character, the
+ * selection is extended to the portion of <code>bounds</code> before
+ * the start of this <code>TextLayout</code>. If the range includes
+ * the last logical character, the selection is extended to the portion
+ * of <code>bounds</code> after the end of this <code>TextLayout</code>.
+ * The height (width on vertical lines) of the selection is always
+ * extended to <code>bounds</code>.
+ * <p>
+ * The selection can be discontiguous on lines with mixed-direction text.
+ * Only those characters in the logical range between start and limit
+ * appear selected. For example, consider the text 'ABCdef' where capital
+ * letters indicate right-to-left text, rendered on a right-to-left line,
+ * with a logical selection from 0 to 4 ('ABCd'). The text appears as
+ * follows, with bold standing in for the selection, and underlining for
+ * the extension:
+ * <br><pre>
+ * <u><b>d</b></u>ef<u><b>CBA </b></u>
+ * </pre>
+ * The selection is discontiguous because the selected characters are
+ * visually discontiguous. Also note that since the range includes the
+ * first logical character (A), the selection is extended to the portion
+ * of the <code>bounds</code> before the start of the layout, which in
+ * this case (a right-to-left line) is the right portion of the
+ * <code>bounds</code>.
+ * @param firstEndpoint an endpoint in the range of characters to select
+ * @param secondEndpoint the other endpoint of the range of characters
+ * to select. Can be less than <code>firstEndpoint</code>. The range
+ * includes the character at min(firstEndpoint, secondEndpoint), but
+ * excludes max(firstEndpoint, secondEndpoint).
+ * @param bounds the bounding rectangle to which to extend the selection.
+ * This is in baseline-relative coordinates.
+ * @return an area enclosing the selection. This is in standard
+ * coordinates.
+ * @see #getVisualHighlightShape(TextHitInfo, TextHitInfo, Rectangle2D)
+ */
+ public Shape getLogicalHighlightShape(int firstEndpoint,
+ int secondEndpoint,
+ Rectangle2D bounds) {
+ if (bounds == null) {
+ throw new IllegalArgumentException("Null Rectangle2D passed to TextLayout.getLogicalHighlightShape()");
+ }
+
+ ensureCache();
+
+ if (firstEndpoint > secondEndpoint) {
+ int t = firstEndpoint;
+ firstEndpoint = secondEndpoint;
+ secondEndpoint = t;
+ }
+
+ if(firstEndpoint < 0 || secondEndpoint > characterCount) {
+ throw new IllegalArgumentException("Range is invalid in TextLayout.getLogicalHighlightShape()");
+ }
+
+ GeneralPath result = new GeneralPath(GeneralPath.WIND_EVEN_ODD);
+
+ int[] carets = new int[10]; // would this ever not handle all cases?
+ int count = 0;
+
+ if (firstEndpoint < secondEndpoint) {
+ int logIndex = firstEndpoint;
+ do {
+ carets[count++] = hitToCaret(TextHitInfo.leading(logIndex));
+ boolean ltr = textLine.isCharLTR(logIndex);
+
+ do {
+ logIndex++;
+ } while (logIndex < secondEndpoint && textLine.isCharLTR(logIndex) == ltr);
+
+ int hitCh = logIndex;
+ carets[count++] = hitToCaret(TextHitInfo.trailing(hitCh - 1));
+
+ if (count == carets.length) {
+ int[] temp = new int[carets.length + 10];
+ System.arraycopy(carets, 0, temp, 0, count);
+ carets = temp;
+ }
+ } while (logIndex < secondEndpoint);
+ }
+ else {
+ count = 2;
+ carets[0] = carets[1] = hitToCaret(TextHitInfo.leading(firstEndpoint));
+ }
+
+ // now create paths for pairs of carets
+
+ for (int i = 0; i < count; i += 2) {
+ result.append(caretBoundingShape(carets[i], carets[i+1], bounds),
+ false);
+ }
+
+ if (firstEndpoint != secondEndpoint) {
+ if ((textLine.isDirectionLTR() && firstEndpoint == 0) || (!textLine.isDirectionLTR() &&
+ secondEndpoint == characterCount)) {
+ GeneralPath ls = leftShape(bounds);
+ if (!ls.getBounds().isEmpty()) {
+ result.append(ls, false);
+ }
+ }
+
+ if ((textLine.isDirectionLTR() && secondEndpoint == characterCount) ||
+ (!textLine.isDirectionLTR() && firstEndpoint == 0)) {
+
+ GeneralPath rs = rightShape(bounds);
+ if (!rs.getBounds().isEmpty()) {
+ result.append(rs, false);
+ }
+ }
+ }
+
+ LayoutPathImpl lp = textLine.getLayoutPath();
+ if (lp != null) {
+ result = (GeneralPath)lp.mapShape(result); // dlf cast safe?
+ }
+ return result;
+ }
+
+ /**
+ * Returns a <code>Shape</code> enclosing the logical selection in the
+ * specified range, extended to the natural bounds of this
+ * <code>TextLayout</code>. This method is a convenience overload of
+ * <code>getLogicalHighlightShape</code> that uses the natural bounds of
+ * this <code>TextLayout</code>.
+ * @param firstEndpoint an endpoint in the range of characters to select
+ * @param secondEndpoint the other endpoint of the range of characters
+ * to select. Can be less than <code>firstEndpoint</code>. The range
+ * includes the character at min(firstEndpoint, secondEndpoint), but
+ * excludes max(firstEndpoint, secondEndpoint).
+ * @return a <code>Shape</code> enclosing the selection. This is in
+ * standard coordinates.
+ */
+ public Shape getLogicalHighlightShape(int firstEndpoint, int secondEndpoint) {
+
+ return getLogicalHighlightShape(firstEndpoint, secondEndpoint, getNaturalBounds());
+ }
+
+ /**
+ * Returns the black box bounds of the characters in the specified range.
+ * The black box bounds is an area consisting of the union of the bounding
+ * boxes of all the glyphs corresponding to the characters between start
+ * and limit. This area can be disjoint.
+ * @param firstEndpoint one end of the character range
+ * @param secondEndpoint the other end of the character range. Can be
+ * less than <code>firstEndpoint</code>.
+ * @return a <code>Shape</code> enclosing the black box bounds. This is
+ * in standard coordinates.
+ */
+ public Shape getBlackBoxBounds(int firstEndpoint, int secondEndpoint) {
+ ensureCache();
+
+ if (firstEndpoint > secondEndpoint) {
+ int t = firstEndpoint;
+ firstEndpoint = secondEndpoint;
+ secondEndpoint = t;
+ }
+
+ if (firstEndpoint < 0 || secondEndpoint > characterCount) {
+ throw new IllegalArgumentException("Invalid range passed to TextLayout.getBlackBoxBounds()");
+ }
+
+ /*
+ * return an area that consists of the bounding boxes of all the
+ * characters from firstEndpoint to limit
+ */
+
+ GeneralPath result = new GeneralPath(GeneralPath.WIND_NON_ZERO);
+
+ if (firstEndpoint < characterCount) {
+ for (int logIndex = firstEndpoint;
+ logIndex < secondEndpoint;
+ logIndex++) {
+
+ Rectangle2D r = textLine.getCharBounds(logIndex);
+ if (!r.isEmpty()) {
+ result.append(r, false);
+ }
+ }
+ }
+
+ if (dx != 0 || dy != 0) {
+ AffineTransform tx = AffineTransform.getTranslateInstance(dx, dy);
+ result = (GeneralPath)tx.createTransformedShape(result);
+ }
+ LayoutPathImpl lp = textLine.getLayoutPath();
+ if (lp != null) {
+ result = (GeneralPath)lp.mapShape(result);
+ }
+
+ //return new Highlight(result, false);
+ return result;
+ }
+
+ /**
+ * Returns the distance from the point (x, y) to the caret along
+ * the line direction defined in <code>caretInfo</code>. Distance is
+ * negative if the point is to the left of the caret on a horizontal
+ * line, or above the caret on a vertical line.
+ * Utility for use by hitTestChar.
+ */
+ private float caretToPointDistance(float[] caretInfo, float x, float y) {
+ // distanceOffBaseline is negative if you're 'above' baseline
+
+ float lineDistance = isVerticalLine? y : x;
+ float distanceOffBaseline = isVerticalLine? -x : y;
+
+ return lineDistance - caretInfo[0] +
+ (distanceOffBaseline*caretInfo[1]);
+ }
+
+ /**
+ * Returns a <code>TextHitInfo</code> corresponding to the
+ * specified point.
+ * Coordinates outside the bounds of the <code>TextLayout</code>
+ * map to hits on the leading edge of the first logical character,
+ * or the trailing edge of the last logical character, as appropriate,
+ * regardless of the position of that character in the line. Only the
+ * direction along the baseline is used to make this evaluation.
+ * @param x the x offset from the origin of this
+ * <code>TextLayout</code>. This is in standard coordinates.
+ * @param y the y offset from the origin of this
+ * <code>TextLayout</code>. This is in standard coordinates.
+ * @param bounds the bounds of the <code>TextLayout</code>. This
+ * is in baseline-relative coordinates.
+ * @return a hit describing the character and edge (leading or trailing)
+ * under the specified point.
+ */
+ public TextHitInfo hitTestChar(float x, float y, Rectangle2D bounds) {
+ // check boundary conditions
+
+ LayoutPathImpl lp = textLine.getLayoutPath();
+ boolean prev = false;
+ if (lp != null) {
+ Point2D.Float pt = new Point2D.Float(x, y);
+ prev = lp.pointToPath(pt, pt);
+ x = pt.x;
+ y = pt.y;
+ }
+
+ if (isVertical()) {
+ if (y < bounds.getMinY()) {
+ return TextHitInfo.leading(0);
+ } else if (y >= bounds.getMaxY()) {
+ return TextHitInfo.trailing(characterCount-1);
+ }
+ } else {
+ if (x < bounds.getMinX()) {
+ return isLeftToRight() ? TextHitInfo.leading(0) : TextHitInfo.trailing(characterCount-1);
+ } else if (x >= bounds.getMaxX()) {
+ return isLeftToRight() ? TextHitInfo.trailing(characterCount-1) : TextHitInfo.leading(0);
+ }
+ }
+
+ // revised hit test
+ // the original seems too complex and fails miserably with italic offsets
+ // the natural tendency is to move towards the character you want to hit
+ // so we'll just measure distance to the center of each character's visual
+ // bounds, pick the closest one, then see which side of the character's
+ // center line (italic) the point is on.
+ // this tends to make it easier to hit narrow characters, which can be a
+ // bit odd if you're visually over an adjacent wide character. this makes
+ // a difference with bidi, so perhaps i need to revisit this yet again.
+
+ double distance = Double.MAX_VALUE;
+ int index = 0;
+ int trail = -1;
+ CoreMetrics lcm = null;
+ float icx = 0, icy = 0, ia = 0, cy = 0, dya = 0, ydsq = 0;
+
+ for (int i = 0; i < characterCount; ++i) {
+ if (!textLine.caretAtOffsetIsValid(i)) {
+ continue;
+ }
+ if (trail == -1) {
+ trail = i;
+ }
+ CoreMetrics cm = textLine.getCoreMetricsAt(i);
+ if (cm != lcm) {
+ lcm = cm;
+ // just work around baseline mess for now
+ if (cm.baselineIndex == GraphicAttribute.TOP_ALIGNMENT) {
+ cy = -(textLine.getMetrics().ascent - cm.ascent) + cm.ssOffset;
+ } else if (cm.baselineIndex == GraphicAttribute.BOTTOM_ALIGNMENT) {
+ cy = textLine.getMetrics().descent - cm.descent + cm.ssOffset;
+ } else {
+ cy = cm.effectiveBaselineOffset(baselineOffsets) + cm.ssOffset;
+ }
+ float dy = (cm.descent - cm.ascent) / 2 - cy;
+ dya = dy * cm.italicAngle;
+ cy += dy;
+ ydsq = (cy - y)*(cy - y);
+ }
+ float cx = textLine.getCharXPosition(i);
+ float ca = textLine.getCharAdvance(i);
+ float dx = ca / 2;
+ cx += dx - dya;
+
+ // proximity in x (along baseline) is two times as important as proximity in y
+ double nd = Math.sqrt(4*(cx - x)*(cx - x) + ydsq);
+ if (nd < distance) {
+ distance = nd;
+ index = i;
+ trail = -1;
+ icx = cx; icy = cy; ia = cm.italicAngle;
+ }
+ }
+ boolean left = x < icx - (y - icy) * ia;
+ boolean leading = textLine.isCharLTR(index) == left;
+ if (trail == -1) {
+ trail = characterCount;
+ }
+ TextHitInfo result = leading ? TextHitInfo.leading(index) :
+ TextHitInfo.trailing(trail-1);
+ return result;
+ }
+
+ /**
+ * Returns a <code>TextHitInfo</code> corresponding to the
+ * specified point. This method is a convenience overload of
+ * <code>hitTestChar</code> that uses the natural bounds of this
+ * <code>TextLayout</code>.
+ * @param x the x offset from the origin of this
+ * <code>TextLayout</code>. This is in standard coordinates.
+ * @param y the y offset from the origin of this
+ * <code>TextLayout</code>. This is in standard coordinates.
+ * @return a hit describing the character and edge (leading or trailing)
+ * under the specified point.
+ */
+ public TextHitInfo hitTestChar(float x, float y) {
+
+ return hitTestChar(x, y, getNaturalBounds());
+ }
+
+ /**
+ * Returns the hash code of this <code>TextLayout</code>.
+ * @return the hash code of this <code>TextLayout</code>.
+ */
+ public int hashCode() {
+ if (hashCodeCache == 0) {
+ ensureCache();
+ hashCodeCache = textLine.hashCode();
+ }
+ return hashCodeCache;
+ }
+
+ /**
+ * Returns <code>true</code> if the specified <code>Object</code> is a
+ * <code>TextLayout</code> object and if the specified <code>Object</code>
+ * equals this <code>TextLayout</code>.
+ * @param obj an <code>Object</code> to test for equality
+ * @return <code>true</code> if the specified <code>Object</code>
+ * equals this <code>TextLayout</code>; <code>false</code>
+ * otherwise.
+ */
+ public boolean equals(Object obj) {
+ return (obj instanceof TextLayout) && equals((TextLayout)obj);
+ }
+
+ /**
+ * Returns <code>true</code> if the two layouts are equal.
+ * Two layouts are equal if they contain equal glyphvectors in the same order.
+ * @param rhs the <code>TextLayout</code> to compare to this
+ * <code>TextLayout</code>
+ * @return <code>true</code> if the specified <code>TextLayout</code>
+ * equals this <code>TextLayout</code>.
+ *
+ */
+ public boolean equals(TextLayout rhs) {
+
+ if (rhs == null) {
+ return false;
+ }
+ if (rhs == this) {
+ return true;
+ }
+
+ ensureCache();
+ return textLine.equals(rhs.textLine);
+ }
+
+ /**
+ * Returns debugging information for this <code>TextLayout</code>.
+ * @return the <code>textLine</code> of this <code>TextLayout</code>
+ * as a <code>String</code>.
+ */
+ public String toString() {
+ ensureCache();
+ return textLine.toString();
+ }
+
+ /**
+ * Renders this <code>TextLayout</code> at the specified location in
+ * the specified {@link java.awt.Graphics2D Graphics2D} context.
+ * The origin of the layout is placed at x, y. Rendering may touch
+ * any point within <code>getBounds()</code> of this position. This
+ * leaves the <code>g2</code> unchanged. Text is rendered along the
+ * baseline path.
+ * @param g2 the <code>Graphics2D</code> context into which to render
+ * the layout
+ * @param x the X coordinate of the origin of this <code>TextLayout</code>
+ * @param y the Y coordinate of the origin of this <code>TextLayout</code>
+ * @see #getBounds()
+ */
+ public void draw(Graphics2D g2, float x, float y) {
+
+ if (g2 == null) {
+ throw new IllegalArgumentException("Null Graphics2D passed to TextLayout.draw()");
+ }
+
+ textLine.draw(g2, x - dx, y - dy);
+ }
+
+ /**
+ * Package-only method for testing ONLY. Please don't abuse.
+ */
+ TextLine getTextLineForTesting() {
+
+ return textLine;
+ }
+
+ /**
+ *
+ * Return the index of the first character with a different baseline from the
+ * character at start, or limit if all characters between start and limit have
+ * the same baseline.
+ */
+ private static int sameBaselineUpTo(Font font, char[] text,
+ int start, int limit) {
+ // current implementation doesn't support multiple baselines
+ return limit;
+ /*
+ byte bl = font.getBaselineFor(text[start++]);
+ while (start < limit && font.getBaselineFor(text[start]) == bl) {
+ ++start;
+ }
+ return start;
+ */
+ }
+
+ static byte getBaselineFromGraphic(GraphicAttribute graphic) {
+
+ byte alignment = (byte) graphic.getAlignment();
+
+ if (alignment == GraphicAttribute.BOTTOM_ALIGNMENT ||
+ alignment == GraphicAttribute.TOP_ALIGNMENT) {
+
+ return (byte)GraphicAttribute.ROMAN_BASELINE;
+ }
+ else {
+ return alignment;
+ }
+ }
+
+ /**
+ * Returns a <code>Shape</code> representing the outline of this
+ * <code>TextLayout</code>.
+ * @param tx an optional {@link AffineTransform} to apply to the
+ * outline of this <code>TextLayout</code>.
+ * @return a <code>Shape</code> that is the outline of this
+ * <code>TextLayout</code>. This is in standard coordinates.
+ */
+ public Shape getOutline(AffineTransform tx) {
+ ensureCache();
+ Shape result = textLine.getOutline(tx);
+ LayoutPathImpl lp = textLine.getLayoutPath();
+ if (lp != null) {
+ result = lp.mapShape(result);
+ }
+ return result;
+ }
+
+ /**
+ * Return the LayoutPath, or null if the layout path is the
+ * default path (x maps to advance, y maps to offset).
+ * @return the layout path
+ * @since 1.6
+ */
+ public LayoutPath getLayoutPath() {
+ return textLine.getLayoutPath();
+ }
+
+ /**
+ * Convert a hit to a point in standard coordinates. The point is
+ * on the baseline of the character at the leading or trailing
+ * edge of the character, as appropriate. If the path is
+ * broken at the side of the character represented by the hit, the
+ * point will be adjacent to the character.
+ * @param hit the hit to check. This must be a valid hit on
+ * the TextLayout.
+ * @param point the returned point. The point is in standard
+ * coordinates.
+ * @throws IllegalArgumentException if the hit is not valid for the
+ * TextLayout.
+ * @throws NullPointerException if hit or point is null.
+ * @since 1.6
+ */
+ public void hitToPoint(TextHitInfo hit, Point2D point) {
+ if (hit == null || point == null) {
+ throw new NullPointerException((hit == null ? "hit" : "point") +
+ " can't be null");
+ }
+ ensureCache();
+ checkTextHit(hit);
+
+ float adv = 0;
+ float off = 0;
+
+ int ix = hit.getCharIndex();
+ boolean leading = hit.isLeadingEdge();
+ boolean ltr;
+ if (ix == -1 || ix == textLine.characterCount()) {
+ ltr = textLine.isDirectionLTR();
+ adv = (ltr == (ix == -1)) ? 0 : lineMetrics.advance;
+ } else {
+ ltr = textLine.isCharLTR(ix);
+ adv = textLine.getCharLinePosition(ix, leading);
+ off = textLine.getCharYPosition(ix);
+ }
+ point.setLocation(adv, off);
+ LayoutPath lp = textLine.getLayoutPath();
+ if (lp != null) {
+ lp.pathToPoint(point, ltr != leading, point);
+ }
+ }
+}