author | lana |
Thu, 26 Dec 2013 12:04:16 -0800 | |
changeset 23010 | 6dadb192ad81 |
parent 21278 | ef8a3a2a72f2 |
child 25111 | 080de8ffa3f6 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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||
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/* |
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* (C) Copyright Taligent, Inc. 1996 - 1997, All Rights Reserved |
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* (C) Copyright IBM Corp. 1996-2003, All Rights Reserved |
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* |
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* The original version of this source code and documentation is |
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* copyrighted and owned by Taligent, Inc., a wholly-owned subsidiary |
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* of IBM. These materials are provided under terms of a License |
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* Agreement between Taligent and Sun. This technology is protected |
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* by multiple US and International patents. |
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* |
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* This notice and attribution to Taligent may not be removed. |
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* Taligent is a registered trademark of Taligent, Inc. |
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* |
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*/ |
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package java.awt.font; |
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import java.awt.Color; |
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import java.awt.Font; |
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import java.awt.Graphics2D; |
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import java.awt.Rectangle; |
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import java.awt.Shape; |
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import java.awt.font.NumericShaper; |
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import java.awt.font.TextLine.TextLineMetrics; |
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import java.awt.geom.AffineTransform; |
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import java.awt.geom.GeneralPath; |
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import java.awt.geom.NoninvertibleTransformException; |
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import java.awt.geom.Point2D; |
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import java.awt.geom.Rectangle2D; |
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import java.text.AttributedString; |
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import java.text.AttributedCharacterIterator; |
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import java.text.AttributedCharacterIterator.Attribute; |
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import java.text.CharacterIterator; |
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import java.util.Map; |
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import java.util.HashMap; |
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import java.util.Hashtable; |
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import sun.font.AttributeValues; |
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import sun.font.CoreMetrics; |
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import sun.font.Decoration; |
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import sun.font.FontLineMetrics; |
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import sun.font.FontResolver; |
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import sun.font.GraphicComponent; |
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import sun.font.LayoutPathImpl; |
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import sun.text.CodePointIterator; |
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||
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/** |
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* |
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* <code>TextLayout</code> is an immutable graphical representation of styled |
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* character data. |
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* <p> |
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* It provides the following capabilities: |
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* <ul> |
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* <li>implicit bidirectional analysis and reordering, |
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* <li>cursor positioning and movement, including split cursors for |
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* mixed directional text, |
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* <li>highlighting, including both logical and visual highlighting |
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* for mixed directional text, |
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* <li>multiple baselines (roman, hanging, and centered), |
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* <li>hit testing, |
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* <li>justification, |
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* <li>default font substitution, |
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* <li>metric information such as ascent, descent, and advance, and |
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* <li>rendering |
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* </ul> |
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* <p> |
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* A <code>TextLayout</code> object can be rendered using |
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* its <code>draw</code> method. |
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* <p> |
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* <code>TextLayout</code> can be constructed either directly or through |
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* the use of a {@link LineBreakMeasurer}. When constructed directly, the |
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* source text represents a single paragraph. <code>LineBreakMeasurer</code> |
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* allows styled text to be broken into lines that fit within a particular |
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* width. See the <code>LineBreakMeasurer</code> documentation for more |
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* information. |
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* <p> |
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* <code>TextLayout</code> construction logically proceeds as follows: |
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* <ul> |
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* <li>paragraph attributes are extracted and examined, |
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* <li>text is analyzed for bidirectional reordering, and reordering |
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* information is computed if needed, |
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* <li>text is segmented into style runs |
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* <li>fonts are chosen for style runs, first by using a font if the |
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* attribute {@link TextAttribute#FONT} is present, otherwise by computing |
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* a default font using the attributes that have been defined |
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* <li>if text is on multiple baselines, the runs or subruns are further |
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* broken into subruns sharing a common baseline, |
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* <li>glyphvectors are generated for each run using the chosen font, |
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* <li>final bidirectional reordering is performed on the glyphvectors |
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* </ul> |
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* <p> |
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* All graphical information returned from a <code>TextLayout</code> |
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* object's methods is relative to the origin of the |
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* <code>TextLayout</code>, which is the intersection of the |
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* <code>TextLayout</code> object's baseline with its left edge. Also, |
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* coordinates passed into a <code>TextLayout</code> object's methods |
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* are assumed to be relative to the <code>TextLayout</code> object's |
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* origin. Clients usually need to translate between a |
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* <code>TextLayout</code> object's coordinate system and the coordinate |
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* system in another object (such as a |
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* {@link java.awt.Graphics Graphics} object). |
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* <p> |
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* <code>TextLayout</code> objects are constructed from styled text, |
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* but they do not retain a reference to their source text. Thus, |
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* changes in the text previously used to generate a <code>TextLayout</code> |
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* do not affect the <code>TextLayout</code>. |
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* <p> |
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* Three methods on a <code>TextLayout</code> object |
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* (<code>getNextRightHit</code>, <code>getNextLeftHit</code>, and |
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* <code>hitTestChar</code>) return instances of {@link TextHitInfo}. |
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* The offsets contained in these <code>TextHitInfo</code> objects |
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* are relative to the start of the <code>TextLayout</code>, <b>not</b> |
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* to the text used to create the <code>TextLayout</code>. Similarly, |
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* <code>TextLayout</code> methods that accept <code>TextHitInfo</code> |
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* instances as parameters expect the <code>TextHitInfo</code> object's |
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* offsets to be relative to the <code>TextLayout</code>, not to any |
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* underlying text storage model. |
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* <p> |
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* <strong>Examples</strong>:<p> |
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* Constructing and drawing a <code>TextLayout</code> and its bounding |
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* rectangle: |
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* <blockquote><pre> |
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* Graphics2D g = ...; |
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* Point2D loc = ...; |
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* Font font = Font.getFont("Helvetica-bold-italic"); |
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* FontRenderContext frc = g.getFontRenderContext(); |
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* TextLayout layout = new TextLayout("This is a string", font, frc); |
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* layout.draw(g, (float)loc.getX(), (float)loc.getY()); |
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* |
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* Rectangle2D bounds = layout.getBounds(); |
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* bounds.setRect(bounds.getX()+loc.getX(), |
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* bounds.getY()+loc.getY(), |
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* bounds.getWidth(), |
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* bounds.getHeight()); |
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* g.draw(bounds); |
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* </pre> |
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* </blockquote> |
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* <p> |
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* Hit-testing a <code>TextLayout</code> (determining which character is at |
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* a particular graphical location): |
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* <blockquote><pre> |
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* Point2D click = ...; |
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* TextHitInfo hit = layout.hitTestChar( |
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* (float) (click.getX() - loc.getX()), |
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* (float) (click.getY() - loc.getY())); |
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* </pre> |
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* </blockquote> |
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* <p> |
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* Responding to a right-arrow key press: |
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* <blockquote><pre> |
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* int insertionIndex = ...; |
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* TextHitInfo next = layout.getNextRightHit(insertionIndex); |
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* if (next != null) { |
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* // translate graphics to origin of layout on screen |
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* g.translate(loc.getX(), loc.getY()); |
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* Shape[] carets = layout.getCaretShapes(next.getInsertionIndex()); |
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* g.draw(carets[0]); |
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* if (carets[1] != null) { |
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* g.draw(carets[1]); |
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* } |
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* } |
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* </pre></blockquote> |
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* <p> |
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* Drawing a selection range corresponding to a substring in the source text. |
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* The selected area may not be visually contiguous: |
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* <blockquote><pre> |
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* // selStart, selLimit should be relative to the layout, |
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* // not to the source text |
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* |
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* int selStart = ..., selLimit = ...; |
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* Color selectionColor = ...; |
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* Shape selection = layout.getLogicalHighlightShape(selStart, selLimit); |
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* // selection may consist of disjoint areas |
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* // graphics is assumed to be tranlated to origin of layout |
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* g.setColor(selectionColor); |
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* g.fill(selection); |
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* </pre></blockquote> |
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* <p> |
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* Drawing a visually contiguous selection range. The selection range may |
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* correspond to more than one substring in the source text. The ranges of |
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* the corresponding source text substrings can be obtained with |
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* <code>getLogicalRangesForVisualSelection()</code>: |
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* <blockquote><pre> |
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* TextHitInfo selStart = ..., selLimit = ...; |
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* Shape selection = layout.getVisualHighlightShape(selStart, selLimit); |
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* g.setColor(selectionColor); |
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* g.fill(selection); |
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* int[] ranges = getLogicalRangesForVisualSelection(selStart, selLimit); |
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* // ranges[0], ranges[1] is the first selection range, |
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* // ranges[2], ranges[3] is the second selection range, etc. |
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* </pre></blockquote> |
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* <p> |
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* Note: Font rotations can cause text baselines to be rotated, and |
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* multiple runs with different rotations can cause the baseline to |
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* bend or zig-zag. In order to account for this (rare) possibility, |
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* some APIs are specified to return metrics and take parameters 'in |
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* baseline-relative coordinates' (e.g. ascent, advance), and others |
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* are in 'in standard coordinates' (e.g. getBounds). Values in |
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* baseline-relative coordinates map the 'x' coordinate to the |
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* distance along the baseline, (positive x is forward along the |
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* baseline), and the 'y' coordinate to a distance along the |
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* perpendicular to the baseline at 'x' (positive y is 90 degrees |
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* clockwise from the baseline vector). Values in standard |
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* coordinates are measured along the x and y axes, with 0,0 at the |
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* origin of the TextLayout. Documentation for each relevant API |
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* indicates what values are in what coordinate system. In general, |
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* measurement-related APIs are in baseline-relative coordinates, |
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* while display-related APIs are in standard coordinates. |
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* |
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* @see LineBreakMeasurer |
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* @see TextAttribute |
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* @see TextHitInfo |
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* @see LayoutPath |
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*/ |
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public final class TextLayout implements Cloneable { |
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private int characterCount; |
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private boolean isVerticalLine = false; |
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private byte baseline; |
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private float[] baselineOffsets; // why have these ? |
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private TextLine textLine; |
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// cached values computed from GlyphSets and set info: |
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// all are recomputed from scratch in buildCache() |
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private TextLine.TextLineMetrics lineMetrics = null; |
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private float visibleAdvance; |
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private int hashCodeCache; |
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/* |
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* TextLayouts are supposedly immutable. If you mutate a TextLayout under |
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* the covers (like the justification code does) you'll need to set this |
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* back to false. Could be replaced with textLine != null <--> cacheIsValid. |
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*/ |
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private boolean cacheIsValid = false; |
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// This value is obtained from an attribute, and constrained to the |
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// interval [0,1]. If 0, the layout cannot be justified. |
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private float justifyRatio; |
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// If a layout is produced by justification, then that layout |
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// cannot be justified. To enforce this constraint the |
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// justifyRatio of the justified layout is set to this value. |
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private static final float ALREADY_JUSTIFIED = -53.9f; |
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// dx and dy specify the distance between the TextLayout's origin |
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// and the origin of the leftmost GlyphSet (TextLayoutComponent, |
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// actually). They were used for hanging punctuation support, |
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// which is no longer implemented. Currently they are both always 0, |
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// and TextLayout is not guaranteed to work with non-zero dx, dy |
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// values right now. They were left in as an aide and reminder to |
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// anyone who implements hanging punctuation or other similar stuff. |
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// They are static now so they don't take up space in TextLayout |
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// instances. |
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private static float dx; |
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private static float dy; |
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/* |
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* Natural bounds is used internally. It is built on demand in |
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* getNaturalBounds. |
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*/ |
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private Rectangle2D naturalBounds = null; |
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/* |
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* boundsRect encloses all of the bits this TextLayout can draw. It |
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* is build on demand in getBounds. |
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*/ |
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private Rectangle2D boundsRect = null; |
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/* |
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* flag to supress/allow carets inside of ligatures when hit testing or |
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* arrow-keying |
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*/ |
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private boolean caretsInLigaturesAreAllowed = false; |
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/** |
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* Defines a policy for determining the strong caret location. |
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* This class contains one method, <code>getStrongCaret</code>, which |
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* is used to specify the policy that determines the strong caret in |
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* dual-caret text. The strong caret is used to move the caret to the |
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* left or right. Instances of this class can be passed to |
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* <code>getCaretShapes</code>, <code>getNextLeftHit</code> and |
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* <code>getNextRightHit</code> to customize strong caret |
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* selection. |
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* <p> |
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* To specify alternate caret policies, subclass <code>CaretPolicy</code> |
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* and override <code>getStrongCaret</code>. <code>getStrongCaret</code> |
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* should inspect the two <code>TextHitInfo</code> arguments and choose |
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* one of them as the strong caret. |
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* <p> |
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* Most clients do not need to use this class. |
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*/ |
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public static class CaretPolicy { |
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/** |
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* Constructs a <code>CaretPolicy</code>. |
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*/ |
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public CaretPolicy() { |
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} |
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/** |
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* Chooses one of the specified <code>TextHitInfo</code> instances as |
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* a strong caret in the specified <code>TextLayout</code>. |
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* @param hit1 a valid hit in <code>layout</code> |
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* @param hit2 a valid hit in <code>layout</code> |
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* @param layout the <code>TextLayout</code> in which |
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* <code>hit1</code> and <code>hit2</code> are used |
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* @return <code>hit1</code> or <code>hit2</code> |
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* (or an equivalent <code>TextHitInfo</code>), indicating the |
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* strong caret. |
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*/ |
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public TextHitInfo getStrongCaret(TextHitInfo hit1, |
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TextHitInfo hit2, |
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TextLayout layout) { |
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// default implementation just calls private method on layout |
2 | 341 |
return layout.getStrongHit(hit1, hit2); |
342 |
} |
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} |
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/** |
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* This <code>CaretPolicy</code> is used when a policy is not specified |
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* by the client. With this policy, a hit on a character whose direction |
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348 |
* is the same as the line direction is stronger than a hit on a |
|
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* counterdirectional character. If the characters' directions are |
|
350 |
* the same, a hit on the leading edge of a character is stronger |
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351 |
* than a hit on the trailing edge of a character. |
|
352 |
*/ |
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353 |
public static final CaretPolicy DEFAULT_CARET_POLICY = new CaretPolicy(); |
|
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/** |
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356 |
* Constructs a <code>TextLayout</code> from a <code>String</code> |
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* and a {@link Font}. All the text is styled using the specified |
|
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* <code>Font</code>. |
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* <p> |
|
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* The <code>String</code> must specify a single paragraph of text, |
|
361 |
* because an entire paragraph is required for the bidirectional |
|
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* algorithm. |
|
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* @param string the text to display |
|
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* @param font a <code>Font</code> used to style the text |
|
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* @param frc contains information about a graphics device which is needed |
|
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* to measure the text correctly. |
|
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* Text measurements can vary slightly depending on the |
|
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* device resolution, and attributes such as antialiasing. This |
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369 |
* parameter does not specify a translation between the |
|
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* <code>TextLayout</code> and user space. |
|
371 |
*/ |
|
372 |
public TextLayout(String string, Font font, FontRenderContext frc) { |
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||
374 |
if (font == null) { |
|
375 |
throw new IllegalArgumentException("Null font passed to TextLayout constructor."); |
|
376 |
} |
|
377 |
||
378 |
if (string == null) { |
|
379 |
throw new IllegalArgumentException("Null string passed to TextLayout constructor."); |
|
380 |
} |
|
381 |
||
382 |
if (string.length() == 0) { |
|
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throw new IllegalArgumentException("Zero length string passed to TextLayout constructor."); |
|
384 |
} |
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changeset
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386 |
Map<? extends Attribute, ?> attributes = null; |
2 | 387 |
if (font.hasLayoutAttributes()) { |
388 |
attributes = font.getAttributes(); |
|
389 |
} |
|
390 |
||
391 |
char[] text = string.toCharArray(); |
|
392 |
if (sameBaselineUpTo(font, text, 0, text.length) == text.length) { |
|
393 |
fastInit(text, font, attributes, frc); |
|
394 |
} else { |
|
395 |
AttributedString as = attributes == null |
|
396 |
? new AttributedString(string) |
|
397 |
: new AttributedString(string, attributes); |
|
398 |
as.addAttribute(TextAttribute.FONT, font); |
|
399 |
standardInit(as.getIterator(), text, frc); |
|
400 |
} |
|
401 |
} |
|
402 |
||
403 |
/** |
|
404 |
* Constructs a <code>TextLayout</code> from a <code>String</code> |
|
405 |
* and an attribute set. |
|
406 |
* <p> |
|
407 |
* All the text is styled using the provided attributes. |
|
408 |
* <p> |
|
409 |
* <code>string</code> must specify a single paragraph of text because an |
|
410 |
* entire paragraph is required for the bidirectional algorithm. |
|
411 |
* @param string the text to display |
|
412 |
* @param attributes the attributes used to style the text |
|
413 |
* @param frc contains information about a graphics device which is needed |
|
414 |
* to measure the text correctly. |
|
415 |
* Text measurements can vary slightly depending on the |
|
416 |
* device resolution, and attributes such as antialiasing. This |
|
417 |
* parameter does not specify a translation between the |
|
418 |
* <code>TextLayout</code> and user space. |
|
419 |
*/ |
|
420 |
public TextLayout(String string, Map<? extends Attribute,?> attributes, |
|
421 |
FontRenderContext frc) |
|
422 |
{ |
|
423 |
if (string == null) { |
|
424 |
throw new IllegalArgumentException("Null string passed to TextLayout constructor."); |
|
425 |
} |
|
426 |
||
427 |
if (attributes == null) { |
|
428 |
throw new IllegalArgumentException("Null map passed to TextLayout constructor."); |
|
429 |
} |
|
430 |
||
431 |
if (string.length() == 0) { |
|
432 |
throw new IllegalArgumentException("Zero length string passed to TextLayout constructor."); |
|
433 |
} |
|
434 |
||
435 |
char[] text = string.toCharArray(); |
|
436 |
Font font = singleFont(text, 0, text.length, attributes); |
|
437 |
if (font != null) { |
|
438 |
fastInit(text, font, attributes, frc); |
|
439 |
} else { |
|
440 |
AttributedString as = new AttributedString(string, attributes); |
|
441 |
standardInit(as.getIterator(), text, frc); |
|
442 |
} |
|
443 |
} |
|
444 |
||
445 |
/* |
|
446 |
* Determines a font for the attributes, and if a single font can render |
|
447 |
* all the text on one baseline, return it, otherwise null. If the |
|
448 |
* attributes specify a font, assume it can display all the text without |
|
449 |
* checking. |
|
450 |
* If the AttributeSet contains an embedded graphic, return null. |
|
451 |
*/ |
|
452 |
private static Font singleFont(char[] text, |
|
453 |
int start, |
|
454 |
int limit, |
|
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|
455 |
Map<? extends Attribute, ?> attributes) { |
2 | 456 |
|
457 |
if (attributes.get(TextAttribute.CHAR_REPLACEMENT) != null) { |
|
458 |
return null; |
|
459 |
} |
|
460 |
||
461 |
Font font = null; |
|
462 |
try { |
|
463 |
font = (Font)attributes.get(TextAttribute.FONT); |
|
464 |
} |
|
465 |
catch (ClassCastException e) { |
|
466 |
} |
|
467 |
if (font == null) { |
|
468 |
if (attributes.get(TextAttribute.FAMILY) != null) { |
|
469 |
font = Font.getFont(attributes); |
|
470 |
if (font.canDisplayUpTo(text, start, limit) != -1) { |
|
471 |
return null; |
|
472 |
} |
|
473 |
} else { |
|
474 |
FontResolver resolver = FontResolver.getInstance(); |
|
475 |
CodePointIterator iter = CodePointIterator.create(text, start, limit); |
|
476 |
int fontIndex = resolver.nextFontRunIndex(iter); |
|
477 |
if (iter.charIndex() == limit) { |
|
478 |
font = resolver.getFont(fontIndex, attributes); |
|
479 |
} |
|
480 |
} |
|
481 |
} |
|
482 |
||
483 |
if (sameBaselineUpTo(font, text, start, limit) != limit) { |
|
484 |
return null; |
|
485 |
} |
|
486 |
||
487 |
return font; |
|
488 |
} |
|
489 |
||
490 |
/** |
|
491 |
* Constructs a <code>TextLayout</code> from an iterator over styled text. |
|
492 |
* <p> |
|
493 |
* The iterator must specify a single paragraph of text because an |
|
494 |
* entire paragraph is required for the bidirectional |
|
495 |
* algorithm. |
|
496 |
* @param text the styled text to display |
|
497 |
* @param frc contains information about a graphics device which is needed |
|
498 |
* to measure the text correctly. |
|
499 |
* Text measurements can vary slightly depending on the |
|
500 |
* device resolution, and attributes such as antialiasing. This |
|
501 |
* parameter does not specify a translation between the |
|
502 |
* <code>TextLayout</code> and user space. |
|
503 |
*/ |
|
504 |
public TextLayout(AttributedCharacterIterator text, FontRenderContext frc) { |
|
505 |
||
506 |
if (text == null) { |
|
507 |
throw new IllegalArgumentException("Null iterator passed to TextLayout constructor."); |
|
508 |
} |
|
509 |
||
510 |
int start = text.getBeginIndex(); |
|
511 |
int limit = text.getEndIndex(); |
|
512 |
if (start == limit) { |
|
513 |
throw new IllegalArgumentException("Zero length iterator passed to TextLayout constructor."); |
|
514 |
} |
|
515 |
||
516 |
int len = limit - start; |
|
517 |
text.first(); |
|
518 |
char[] chars = new char[len]; |
|
519 |
int n = 0; |
|
11081
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changeset
|
520 |
for (char c = text.first(); |
4a18889223e4
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changeset
|
521 |
c != CharacterIterator.DONE; |
4a18889223e4
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diff
changeset
|
522 |
c = text.next()) |
4a18889223e4
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diff
changeset
|
523 |
{ |
2 | 524 |
chars[n++] = c; |
525 |
} |
|
526 |
||
527 |
text.first(); |
|
528 |
if (text.getRunLimit() == limit) { |
|
529 |
||
11081
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10419
diff
changeset
|
530 |
Map<? extends Attribute, ?> attributes = text.getAttributes(); |
2 | 531 |
Font font = singleFont(chars, 0, len, attributes); |
532 |
if (font != null) { |
|
533 |
fastInit(chars, font, attributes, frc); |
|
534 |
return; |
|
535 |
} |
|
536 |
} |
|
537 |
||
538 |
standardInit(text, chars, frc); |
|
539 |
} |
|
540 |
||
541 |
/** |
|
542 |
* Creates a <code>TextLayout</code> from a {@link TextLine} and |
|
543 |
* some paragraph data. This method is used by {@link TextMeasurer}. |
|
544 |
* @param textLine the line measurement attributes to apply to the |
|
545 |
* the resulting <code>TextLayout</code> |
|
546 |
* @param baseline the baseline of the text |
|
547 |
* @param baselineOffsets the baseline offsets for this |
|
548 |
* <code>TextLayout</code>. This should already be normalized to |
|
549 |
* <code>baseline</code> |
|
550 |
* @param justifyRatio <code>0</code> if the <code>TextLayout</code> |
|
551 |
* cannot be justified; <code>1</code> otherwise. |
|
552 |
*/ |
|
553 |
TextLayout(TextLine textLine, |
|
554 |
byte baseline, |
|
555 |
float[] baselineOffsets, |
|
556 |
float justifyRatio) { |
|
557 |
||
558 |
this.characterCount = textLine.characterCount(); |
|
559 |
this.baseline = baseline; |
|
560 |
this.baselineOffsets = baselineOffsets; |
|
561 |
this.textLine = textLine; |
|
562 |
this.justifyRatio = justifyRatio; |
|
563 |
} |
|
564 |
||
565 |
/** |
|
566 |
* Initialize the paragraph-specific data. |
|
567 |
*/ |
|
11081
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parents:
10419
diff
changeset
|
568 |
private void paragraphInit(byte aBaseline, CoreMetrics lm, |
4a18889223e4
7117199: Fix javac warnings in src/share/classes/java/awt/font
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parents:
10419
diff
changeset
|
569 |
Map<? extends Attribute, ?> paragraphAttrs, |
4a18889223e4
7117199: Fix javac warnings in src/share/classes/java/awt/font
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parents:
10419
diff
changeset
|
570 |
char[] text) { |
2 | 571 |
|
572 |
baseline = aBaseline; |
|
573 |
||
574 |
// normalize to current baseline |
|
575 |
baselineOffsets = TextLine.getNormalizedOffsets(lm.baselineOffsets, baseline); |
|
576 |
||
577 |
justifyRatio = AttributeValues.getJustification(paragraphAttrs); |
|
578 |
NumericShaper shaper = AttributeValues.getNumericShaping(paragraphAttrs); |
|
579 |
if (shaper != null) { |
|
580 |
shaper.shape(text, 0, text.length); |
|
581 |
} |
|
582 |
} |
|
583 |
||
584 |
/* |
|
585 |
* the fast init generates a single glyph set. This requires: |
|
586 |
* all one style |
|
587 |
* all renderable by one font (ie no embedded graphics) |
|
588 |
* all on one baseline |
|
589 |
*/ |
|
11081
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10419
diff
changeset
|
590 |
private void fastInit(char[] chars, Font font, |
4a18889223e4
7117199: Fix javac warnings in src/share/classes/java/awt/font
prr
parents:
10419
diff
changeset
|
591 |
Map<? extends Attribute, ?> attrs, |
4a18889223e4
7117199: Fix javac warnings in src/share/classes/java/awt/font
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parents:
10419
diff
changeset
|
592 |
FontRenderContext frc) { |
4a18889223e4
7117199: Fix javac warnings in src/share/classes/java/awt/font
prr
parents:
10419
diff
changeset
|
593 |
|
2 | 594 |
// Object vf = attrs.get(TextAttribute.ORIENTATION); |
595 |
// isVerticalLine = TextAttribute.ORIENTATION_VERTICAL.equals(vf); |
|
596 |
isVerticalLine = false; |
|
597 |
||
598 |
LineMetrics lm = font.getLineMetrics(chars, 0, chars.length, frc); |
|
599 |
CoreMetrics cm = CoreMetrics.get(lm); |
|
600 |
byte glyphBaseline = (byte) cm.baselineIndex; |
|
601 |
||
602 |
if (attrs == null) { |
|
603 |
baseline = glyphBaseline; |
|
604 |
baselineOffsets = cm.baselineOffsets; |
|
605 |
justifyRatio = 1.0f; |
|
606 |
} else { |
|
607 |
paragraphInit(glyphBaseline, cm, attrs, chars); |
|
608 |
} |
|
609 |
||
610 |
characterCount = chars.length; |
|
611 |
||
612 |
textLine = TextLine.fastCreateTextLine(frc, chars, font, cm, attrs); |
|
613 |
} |
|
614 |
||
615 |
/* |
|
616 |
* the standard init generates multiple glyph sets based on style, |
|
617 |
* renderable, and baseline runs. |
|
618 |
* @param chars the text in the iterator, extracted into a char array |
|
619 |
*/ |
|
620 |
private void standardInit(AttributedCharacterIterator text, char[] chars, FontRenderContext frc) { |
|
621 |
||
622 |
characterCount = chars.length; |
|
623 |
||
624 |
// set paragraph attributes |
|
625 |
{ |
|
626 |
// If there's an embedded graphic at the start of the |
|
627 |
// paragraph, look for the first non-graphic character |
|
628 |
// and use it and its font to initialize the paragraph. |
|
629 |
// If not, use the first graphic to initialize. |
|
630 |
||
11081
4a18889223e4
7117199: Fix javac warnings in src/share/classes/java/awt/font
prr
parents:
10419
diff
changeset
|
631 |
Map<? extends Attribute, ?> paragraphAttrs = text.getAttributes(); |
2 | 632 |
|
633 |
boolean haveFont = TextLine.advanceToFirstFont(text); |
|
634 |
||
635 |
if (haveFont) { |
|
636 |
Font defaultFont = TextLine.getFontAtCurrentPos(text); |
|
637 |
int charsStart = text.getIndex() - text.getBeginIndex(); |
|
638 |
LineMetrics lm = defaultFont.getLineMetrics(chars, charsStart, charsStart+1, frc); |
|
639 |
CoreMetrics cm = CoreMetrics.get(lm); |
|
640 |
paragraphInit((byte)cm.baselineIndex, cm, paragraphAttrs, chars); |
|
641 |
} |
|
642 |
else { |
|
643 |
// hmmm what to do here? Just try to supply reasonable |
|
644 |
// values I guess. |
|
645 |
||
646 |
GraphicAttribute graphic = (GraphicAttribute) |
|
647 |
paragraphAttrs.get(TextAttribute.CHAR_REPLACEMENT); |
|
648 |
byte defaultBaseline = getBaselineFromGraphic(graphic); |
|
649 |
CoreMetrics cm = GraphicComponent.createCoreMetrics(graphic); |
|
650 |
paragraphInit(defaultBaseline, cm, paragraphAttrs, chars); |
|
651 |
} |
|
652 |
} |
|
653 |
||
654 |
textLine = TextLine.standardCreateTextLine(frc, text, chars, baselineOffsets); |
|
655 |
} |
|
656 |
||
657 |
/* |
|
658 |
* A utility to rebuild the ascent/descent/leading/advance cache. |
|
659 |
* You'll need to call this if you clone and mutate (like justification, |
|
660 |
* editing methods do) |
|
661 |
*/ |
|
662 |
private void ensureCache() { |
|
663 |
if (!cacheIsValid) { |
|
664 |
buildCache(); |
|
665 |
} |
|
666 |
} |
|
667 |
||
668 |
private void buildCache() { |
|
669 |
lineMetrics = textLine.getMetrics(); |
|
670 |
||
671 |
// compute visibleAdvance |
|
672 |
if (textLine.isDirectionLTR()) { |
|
673 |
||
674 |
int lastNonSpace = characterCount-1; |
|
675 |
while (lastNonSpace != -1) { |
|
676 |
int logIndex = textLine.visualToLogical(lastNonSpace); |
|
677 |
if (!textLine.isCharSpace(logIndex)) { |
|
678 |
break; |
|
679 |
} |
|
680 |
else { |
|
681 |
--lastNonSpace; |
|
682 |
} |
|
683 |
} |
|
684 |
if (lastNonSpace == characterCount-1) { |
|
685 |
visibleAdvance = lineMetrics.advance; |
|
686 |
} |
|
687 |
else if (lastNonSpace == -1) { |
|
688 |
visibleAdvance = 0; |
|
689 |
} |
|
690 |
else { |
|
691 |
int logIndex = textLine.visualToLogical(lastNonSpace); |
|
692 |
visibleAdvance = textLine.getCharLinePosition(logIndex) |
|
693 |
+ textLine.getCharAdvance(logIndex); |
|
694 |
} |
|
695 |
} |
|
696 |
else { |
|
697 |
||
698 |
int leftmostNonSpace = 0; |
|
699 |
while (leftmostNonSpace != characterCount) { |
|
700 |
int logIndex = textLine.visualToLogical(leftmostNonSpace); |
|
701 |
if (!textLine.isCharSpace(logIndex)) { |
|
702 |
break; |
|
703 |
} |
|
704 |
else { |
|
705 |
++leftmostNonSpace; |
|
706 |
} |
|
707 |
} |
|
708 |
if (leftmostNonSpace == characterCount) { |
|
709 |
visibleAdvance = 0; |
|
710 |
} |
|
711 |
else if (leftmostNonSpace == 0) { |
|
712 |
visibleAdvance = lineMetrics.advance; |
|
713 |
} |
|
714 |
else { |
|
715 |
int logIndex = textLine.visualToLogical(leftmostNonSpace); |
|
716 |
float pos = textLine.getCharLinePosition(logIndex); |
|
717 |
visibleAdvance = lineMetrics.advance - pos; |
|
718 |
} |
|
719 |
} |
|
720 |
||
721 |
// naturalBounds, boundsRect will be generated on demand |
|
722 |
naturalBounds = null; |
|
723 |
boundsRect = null; |
|
724 |
||
725 |
// hashCode will be regenerated on demand |
|
726 |
hashCodeCache = 0; |
|
727 |
||
728 |
cacheIsValid = true; |
|
729 |
} |
|
730 |
||
731 |
/** |
|
732 |
* The 'natural bounds' encloses all the carets the layout can draw. |
|
733 |
* |
|
734 |
*/ |
|
735 |
private Rectangle2D getNaturalBounds() { |
|
736 |
ensureCache(); |
|
737 |
||
738 |
if (naturalBounds == null) { |
|
739 |
naturalBounds = textLine.getItalicBounds(); |
|
740 |
} |
|
741 |
||
742 |
return naturalBounds; |
|
743 |
} |
|
744 |
||
745 |
/** |
|
746 |
* Creates a copy of this <code>TextLayout</code>. |
|
747 |
*/ |
|
748 |
protected Object clone() { |
|
749 |
/* |
|
750 |
* !!! I think this is safe. Once created, nothing mutates the |
|
751 |
* glyphvectors or arrays. But we need to make sure. |
|
752 |
* {jbr} actually, that's not quite true. The justification code |
|
753 |
* mutates after cloning. It doesn't actually change the glyphvectors |
|
754 |
* (that's impossible) but it replaces them with justified sets. This |
|
755 |
* is a problem for GlyphIterator creation, since new GlyphIterators |
|
756 |
* are created by cloning a prototype. If the prototype has outdated |
|
757 |
* glyphvectors, so will the new ones. A partial solution is to set the |
|
758 |
* prototypical GlyphIterator to null when the glyphvectors change. If |
|
759 |
* you forget this one time, you're hosed. |
|
760 |
*/ |
|
761 |
try { |
|
762 |
return super.clone(); |
|
763 |
} |
|
764 |
catch (CloneNotSupportedException e) { |
|
10419
12c063b39232
7084245: Update usages of InternalError to use exception chaining
sherman
parents:
5506
diff
changeset
|
765 |
throw new InternalError(e); |
2 | 766 |
} |
767 |
} |
|
768 |
||
769 |
/* |
|
770 |
* Utility to throw an expection if an invalid TextHitInfo is passed |
|
771 |
* as a parameter. Avoids code duplication. |
|
772 |
*/ |
|
773 |
private void checkTextHit(TextHitInfo hit) { |
|
774 |
if (hit == null) { |
|
775 |
throw new IllegalArgumentException("TextHitInfo is null."); |
|
776 |
} |
|
777 |
||
778 |
if (hit.getInsertionIndex() < 0 || |
|
779 |
hit.getInsertionIndex() > characterCount) { |
|
780 |
throw new IllegalArgumentException("TextHitInfo is out of range"); |
|
781 |
} |
|
782 |
} |
|
783 |
||
784 |
/** |
|
785 |
* Creates a copy of this <code>TextLayout</code> justified to the |
|
786 |
* specified width. |
|
787 |
* <p> |
|
788 |
* If this <code>TextLayout</code> has already been justified, an |
|
789 |
* exception is thrown. If this <code>TextLayout</code> object's |
|
790 |
* justification ratio is zero, a <code>TextLayout</code> identical |
|
791 |
* to this <code>TextLayout</code> is returned. |
|
792 |
* @param justificationWidth the width to use when justifying the line. |
|
793 |
* For best results, it should not be too different from the current |
|
794 |
* advance of the line. |
|
795 |
* @return a <code>TextLayout</code> justified to the specified width. |
|
796 |
* @exception Error if this layout has already been justified, an Error is |
|
797 |
* thrown. |
|
798 |
*/ |
|
799 |
public TextLayout getJustifiedLayout(float justificationWidth) { |
|
800 |
||
801 |
if (justificationWidth <= 0) { |
|
802 |
throw new IllegalArgumentException("justificationWidth <= 0 passed to TextLayout.getJustifiedLayout()"); |
|
803 |
} |
|
804 |
||
805 |
if (justifyRatio == ALREADY_JUSTIFIED) { |
|
806 |
throw new Error("Can't justify again."); |
|
807 |
} |
|
808 |
||
809 |
ensureCache(); // make sure textLine is not null |
|
810 |
||
811 |
// default justification range to exclude trailing logical whitespace |
|
812 |
int limit = characterCount; |
|
813 |
while (limit > 0 && textLine.isCharWhitespace(limit-1)) { |
|
814 |
--limit; |
|
815 |
} |
|
816 |
||
817 |
TextLine newLine = textLine.getJustifiedLine(justificationWidth, justifyRatio, 0, limit); |
|
818 |
if (newLine != null) { |
|
819 |
return new TextLayout(newLine, baseline, baselineOffsets, ALREADY_JUSTIFIED); |
|
820 |
} |
|
821 |
||
822 |
return this; |
|
823 |
} |
|
824 |
||
825 |
/** |
|
826 |
* Justify this layout. Overridden by subclassers to control justification |
|
827 |
* (if there were subclassers, that is...) |
|
828 |
* |
|
829 |
* The layout will only justify if the paragraph attributes (from the |
|
830 |
* source text, possibly defaulted by the layout attributes) indicate a |
|
831 |
* non-zero justification ratio. The text will be justified to the |
|
832 |
* indicated width. The current implementation also adjusts hanging |
|
833 |
* punctuation and trailing whitespace to overhang the justification width. |
|
834 |
* Once justified, the layout may not be rejustified. |
|
835 |
* <p> |
|
836 |
* Some code may rely on immutablity of layouts. Subclassers should not |
|
837 |
* call this directly, but instead should call getJustifiedLayout, which |
|
838 |
* will call this method on a clone of this layout, preserving |
|
839 |
* the original. |
|
840 |
* |
|
841 |
* @param justificationWidth the width to use when justifying the line. |
|
842 |
* For best results, it should not be too different from the current |
|
843 |
* advance of the line. |
|
844 |
* @see #getJustifiedLayout(float) |
|
845 |
*/ |
|
846 |
protected void handleJustify(float justificationWidth) { |
|
847 |
// never called |
|
848 |
} |
|
849 |
||
850 |
||
851 |
/** |
|
852 |
* Returns the baseline for this <code>TextLayout</code>. |
|
853 |
* The baseline is one of the values defined in <code>Font</code>, |
|
854 |
* which are roman, centered and hanging. Ascent and descent are |
|
855 |
* relative to this baseline. The <code>baselineOffsets</code> |
|
856 |
* are also relative to this baseline. |
|
857 |
* @return the baseline of this <code>TextLayout</code>. |
|
858 |
* @see #getBaselineOffsets() |
|
859 |
* @see Font |
|
860 |
*/ |
|
861 |
public byte getBaseline() { |
|
862 |
return baseline; |
|
863 |
} |
|
864 |
||
865 |
/** |
|
866 |
* Returns the offsets array for the baselines used for this |
|
867 |
* <code>TextLayout</code>. |
|
868 |
* <p> |
|
869 |
* The array is indexed by one of the values defined in |
|
870 |
* <code>Font</code>, which are roman, centered and hanging. The |
|
871 |
* values are relative to this <code>TextLayout</code> object's |
|
872 |
* baseline, so that <code>getBaselineOffsets[getBaseline()] == 0</code>. |
|
873 |
* Offsets are added to the position of the <code>TextLayout</code> |
|
874 |
* object's baseline to get the position for the new baseline. |
|
875 |
* @return the offsets array containing the baselines used for this |
|
876 |
* <code>TextLayout</code>. |
|
877 |
* @see #getBaseline() |
|
878 |
* @see Font |
|
879 |
*/ |
|
880 |
public float[] getBaselineOffsets() { |
|
881 |
float[] offsets = new float[baselineOffsets.length]; |
|
882 |
System.arraycopy(baselineOffsets, 0, offsets, 0, offsets.length); |
|
883 |
return offsets; |
|
884 |
} |
|
885 |
||
886 |
/** |
|
887 |
* Returns the advance of this <code>TextLayout</code>. |
|
888 |
* The advance is the distance from the origin to the advance of the |
|
889 |
* rightmost (bottommost) character. This is in baseline-relative |
|
890 |
* coordinates. |
|
891 |
* @return the advance of this <code>TextLayout</code>. |
|
892 |
*/ |
|
893 |
public float getAdvance() { |
|
894 |
ensureCache(); |
|
895 |
return lineMetrics.advance; |
|
896 |
} |
|
897 |
||
898 |
/** |
|
899 |
* Returns the advance of this <code>TextLayout</code>, minus trailing |
|
900 |
* whitespace. This is in baseline-relative coordinates. |
|
901 |
* @return the advance of this <code>TextLayout</code> without the |
|
902 |
* trailing whitespace. |
|
903 |
* @see #getAdvance() |
|
904 |
*/ |
|
905 |
public float getVisibleAdvance() { |
|
906 |
ensureCache(); |
|
907 |
return visibleAdvance; |
|
908 |
} |
|
909 |
||
910 |
/** |
|
911 |
* Returns the ascent of this <code>TextLayout</code>. |
|
912 |
* The ascent is the distance from the top (right) of the |
|
913 |
* <code>TextLayout</code> to the baseline. It is always either |
|
914 |
* positive or zero. The ascent is sufficient to |
|
21278 | 915 |
* accommodate superscripted text and is the maximum of the sum of the |
2 | 916 |
* ascent, offset, and baseline of each glyph. The ascent is |
917 |
* the maximum ascent from the baseline of all the text in the |
|
918 |
* TextLayout. It is in baseline-relative coordinates. |
|
919 |
* @return the ascent of this <code>TextLayout</code>. |
|
920 |
*/ |
|
921 |
public float getAscent() { |
|
922 |
ensureCache(); |
|
923 |
return lineMetrics.ascent; |
|
924 |
} |
|
925 |
||
926 |
/** |
|
927 |
* Returns the descent of this <code>TextLayout</code>. |
|
928 |
* The descent is the distance from the baseline to the bottom (left) of |
|
929 |
* the <code>TextLayout</code>. It is always either positive or zero. |
|
21278 | 930 |
* The descent is sufficient to accommodate subscripted text and is the |
2 | 931 |
* maximum of the sum of the descent, offset, and baseline of each glyph. |
932 |
* This is the maximum descent from the baseline of all the text in |
|
933 |
* the TextLayout. It is in baseline-relative coordinates. |
|
934 |
* @return the descent of this <code>TextLayout</code>. |
|
935 |
*/ |
|
936 |
public float getDescent() { |
|
937 |
ensureCache(); |
|
938 |
return lineMetrics.descent; |
|
939 |
} |
|
940 |
||
941 |
/** |
|
942 |
* Returns the leading of the <code>TextLayout</code>. |
|
943 |
* The leading is the suggested interline spacing for this |
|
944 |
* <code>TextLayout</code>. This is in baseline-relative |
|
945 |
* coordinates. |
|
946 |
* <p> |
|
947 |
* The leading is computed from the leading, descent, and baseline |
|
948 |
* of all glyphvectors in the <code>TextLayout</code>. The algorithm |
|
949 |
* is roughly as follows: |
|
950 |
* <blockquote><pre> |
|
951 |
* maxD = 0; |
|
952 |
* maxDL = 0; |
|
953 |
* for (GlyphVector g in all glyphvectors) { |
|
954 |
* maxD = max(maxD, g.getDescent() + offsets[g.getBaseline()]); |
|
955 |
* maxDL = max(maxDL, g.getDescent() + g.getLeading() + |
|
956 |
* offsets[g.getBaseline()]); |
|
957 |
* } |
|
958 |
* return maxDL - maxD; |
|
959 |
* </pre></blockquote> |
|
960 |
* @return the leading of this <code>TextLayout</code>. |
|
961 |
*/ |
|
962 |
public float getLeading() { |
|
963 |
ensureCache(); |
|
964 |
return lineMetrics.leading; |
|
965 |
} |
|
966 |
||
967 |
/** |
|
968 |
* Returns the bounds of this <code>TextLayout</code>. |
|
969 |
* The bounds are in standard coordinates. |
|
970 |
* <p>Due to rasterization effects, this bounds might not enclose all of the |
|
971 |
* pixels rendered by the TextLayout.</p> |
|
972 |
* It might not coincide exactly with the ascent, descent, |
|
973 |
* origin or advance of the <code>TextLayout</code>. |
|
974 |
* @return a {@link Rectangle2D} that is the bounds of this |
|
975 |
* <code>TextLayout</code>. |
|
976 |
*/ |
|
977 |
public Rectangle2D getBounds() { |
|
978 |
ensureCache(); |
|
979 |
||
980 |
if (boundsRect == null) { |
|
981 |
Rectangle2D vb = textLine.getVisualBounds(); |
|
982 |
if (dx != 0 || dy != 0) { |
|
983 |
vb.setRect(vb.getX() - dx, |
|
984 |
vb.getY() - dy, |
|
985 |
vb.getWidth(), |
|
986 |
vb.getHeight()); |
|
987 |
} |
|
988 |
boundsRect = vb; |
|
989 |
} |
|
990 |
||
991 |
Rectangle2D bounds = new Rectangle2D.Float(); |
|
992 |
bounds.setRect(boundsRect); |
|
993 |
||
994 |
return bounds; |
|
995 |
} |
|
996 |
||
997 |
/** |
|
998 |
* Returns the pixel bounds of this <code>TextLayout</code> when |
|
999 |
* rendered in a graphics with the given |
|
1000 |
* <code>FontRenderContext</code> at the given location. The |
|
1001 |
* graphics render context need not be the same as the |
|
1002 |
* <code>FontRenderContext</code> used to create this |
|
1003 |
* <code>TextLayout</code>, and can be null. If it is null, the |
|
1004 |
* <code>FontRenderContext</code> of this <code>TextLayout</code> |
|
1005 |
* is used. |
|
1006 |
* @param frc the <code>FontRenderContext</code> of the <code>Graphics</code>. |
|
1007 |
* @param x the x-coordinate at which to render this <code>TextLayout</code>. |
|
1008 |
* @param y the y-coordinate at which to render this <code>TextLayout</code>. |
|
1009 |
* @return a <code>Rectangle</code> bounding the pixels that would be affected. |
|
1010 |
* @see GlyphVector#getPixelBounds |
|
1011 |
* @since 1.6 |
|
1012 |
*/ |
|
1013 |
public Rectangle getPixelBounds(FontRenderContext frc, float x, float y) { |
|
1014 |
return textLine.getPixelBounds(frc, x, y); |
|
1015 |
} |
|
1016 |
||
1017 |
/** |
|
1018 |
* Returns <code>true</code> if this <code>TextLayout</code> has |
|
1019 |
* a left-to-right base direction or <code>false</code> if it has |
|
1020 |
* a right-to-left base direction. The <code>TextLayout</code> |
|
1021 |
* has a base direction of either left-to-right (LTR) or |
|
1022 |
* right-to-left (RTL). The base direction is independent of the |
|
1023 |
* actual direction of text on the line, which may be either LTR, |
|
1024 |
* RTL, or mixed. Left-to-right layouts by default should position |
|
1025 |
* flush left. If the layout is on a tabbed line, the |
|
1026 |
* tabs run left to right, so that logically successive layouts position |
|
1027 |
* left to right. The opposite is true for RTL layouts. By default they |
|
1028 |
* should position flush left, and tabs run right-to-left. |
|
1029 |
* @return <code>true</code> if the base direction of this |
|
1030 |
* <code>TextLayout</code> is left-to-right; <code>false</code> |
|
1031 |
* otherwise. |
|
1032 |
*/ |
|
1033 |
public boolean isLeftToRight() { |
|
1034 |
return textLine.isDirectionLTR(); |
|
1035 |
} |
|
1036 |
||
1037 |
/** |
|
1038 |
* Returns <code>true</code> if this <code>TextLayout</code> is vertical. |
|
1039 |
* @return <code>true</code> if this <code>TextLayout</code> is vertical; |
|
1040 |
* <code>false</code> otherwise. |
|
1041 |
*/ |
|
1042 |
public boolean isVertical() { |
|
1043 |
return isVerticalLine; |
|
1044 |
} |
|
1045 |
||
1046 |
/** |
|
1047 |
* Returns the number of characters represented by this |
|
1048 |
* <code>TextLayout</code>. |
|
1049 |
* @return the number of characters in this <code>TextLayout</code>. |
|
1050 |
*/ |
|
1051 |
public int getCharacterCount() { |
|
1052 |
return characterCount; |
|
1053 |
} |
|
1054 |
||
1055 |
/* |
|
1056 |
* carets and hit testing |
|
1057 |
* |
|
1058 |
* Positions on a text line are represented by instances of TextHitInfo. |
|
1059 |
* Any TextHitInfo with characterOffset between 0 and characterCount-1, |
|
1060 |
* inclusive, represents a valid position on the line. Additionally, |
|
1061 |
* [-1, trailing] and [characterCount, leading] are valid positions, and |
|
1062 |
* represent positions at the logical start and end of the line, |
|
1063 |
* respectively. |
|
1064 |
* |
|
1065 |
* The characterOffsets in TextHitInfo's used and returned by TextLayout |
|
1066 |
* are relative to the beginning of the text layout, not necessarily to |
|
1067 |
* the beginning of the text storage the client is using. |
|
1068 |
* |
|
1069 |
* |
|
1070 |
* Every valid TextHitInfo has either one or two carets associated with it. |
|
1071 |
* A caret is a visual location in the TextLayout indicating where text at |
|
1072 |
* the TextHitInfo will be displayed on screen. If a TextHitInfo |
|
1073 |
* represents a location on a directional boundary, then there are two |
|
1074 |
* possible visible positions for newly inserted text. Consider the |
|
1075 |
* following example, in which capital letters indicate right-to-left text, |
|
1076 |
* and the overall line direction is left-to-right: |
|
1077 |
* |
|
1078 |
* Text Storage: [ a, b, C, D, E, f ] |
|
1079 |
* Display: a b E D C f |
|
1080 |
* |
|
1081 |
* The text hit info (1, t) represents the trailing side of 'b'. If 'q', |
|
1082 |
* a left-to-right character is inserted into the text storage at this |
|
1083 |
* location, it will be displayed between the 'b' and the 'E': |
|
1084 |
* |
|
1085 |
* Text Storage: [ a, b, q, C, D, E, f ] |
|
1086 |
* Display: a b q E D C f |
|
1087 |
* |
|
1088 |
* However, if a 'W', which is right-to-left, is inserted into the storage |
|
1089 |
* after 'b', the storage and display will be: |
|
1090 |
* |
|
1091 |
* Text Storage: [ a, b, W, C, D, E, f ] |
|
1092 |
* Display: a b E D C W f |
|
1093 |
* |
|
1094 |
* So, for the original text storage, two carets should be displayed for |
|
1095 |
* location (1, t): one visually between 'b' and 'E' and one visually |
|
1096 |
* between 'C' and 'f'. |
|
1097 |
* |
|
1098 |
* |
|
1099 |
* When two carets are displayed for a TextHitInfo, one caret is the |
|
1100 |
* 'strong' caret and the other is the 'weak' caret. The strong caret |
|
1101 |
* indicates where an inserted character will be displayed when that |
|
1102 |
* character's direction is the same as the direction of the TextLayout. |
|
1103 |
* The weak caret shows where an character inserted character will be |
|
1104 |
* displayed when the character's direction is opposite that of the |
|
1105 |
* TextLayout. |
|
1106 |
* |
|
1107 |
* |
|
1108 |
* Clients should not be overly concerned with the details of correct |
|
1109 |
* caret display. TextLayout.getCaretShapes(TextHitInfo) will return an |
|
1110 |
* array of two paths representing where carets should be displayed. |
|
1111 |
* The first path in the array is the strong caret; the second element, |
|
1112 |
* if non-null, is the weak caret. If the second element is null, |
|
1113 |
* then there is no weak caret for the given TextHitInfo. |
|
1114 |
* |
|
1115 |
* |
|
1116 |
* Since text can be visually reordered, logically consecutive |
|
1117 |
* TextHitInfo's may not be visually consecutive. One implication of this |
|
1118 |
* is that a client cannot tell from inspecting a TextHitInfo whether the |
|
1119 |
* hit represents the first (or last) caret in the layout. Clients |
|
1120 |
* can call getVisualOtherHit(); if the visual companion is |
|
1121 |
* (-1, TRAILING) or (characterCount, LEADING), then the hit is at the |
|
1122 |
* first (last) caret position in the layout. |
|
1123 |
*/ |
|
1124 |
||
1125 |
private float[] getCaretInfo(int caret, |
|
1126 |
Rectangle2D bounds, |
|
1127 |
float[] info) { |
|
1128 |
||
1129 |
float top1X, top2X; |
|
1130 |
float bottom1X, bottom2X; |
|
1131 |
||
1132 |
if (caret == 0 || caret == characterCount) { |
|
1133 |
||
1134 |
float pos; |
|
1135 |
int logIndex; |
|
1136 |
if (caret == characterCount) { |
|
1137 |
logIndex = textLine.visualToLogical(characterCount-1); |
|
1138 |
pos = textLine.getCharLinePosition(logIndex) |
|
1139 |
+ textLine.getCharAdvance(logIndex); |
|
1140 |
} |
|
1141 |
else { |
|
1142 |
logIndex = textLine.visualToLogical(caret); |
|
1143 |
pos = textLine.getCharLinePosition(logIndex); |
|
1144 |
} |
|
1145 |
float angle = textLine.getCharAngle(logIndex); |
|
1146 |
float shift = textLine.getCharShift(logIndex); |
|
1147 |
pos += angle * shift; |
|
1148 |
top1X = top2X = pos + angle*textLine.getCharAscent(logIndex); |
|
1149 |
bottom1X = bottom2X = pos - angle*textLine.getCharDescent(logIndex); |
|
1150 |
} |
|
1151 |
else { |
|
1152 |
||
1153 |
{ |
|
1154 |
int logIndex = textLine.visualToLogical(caret-1); |
|
1155 |
float angle1 = textLine.getCharAngle(logIndex); |
|
1156 |
float pos1 = textLine.getCharLinePosition(logIndex) |
|
1157 |
+ textLine.getCharAdvance(logIndex); |
|
1158 |
if (angle1 != 0) { |
|
1159 |
pos1 += angle1 * textLine.getCharShift(logIndex); |
|
1160 |
top1X = pos1 + angle1*textLine.getCharAscent(logIndex); |
|
1161 |
bottom1X = pos1 - angle1*textLine.getCharDescent(logIndex); |
|
1162 |
} |
|
1163 |
else { |
|
1164 |
top1X = bottom1X = pos1; |
|
1165 |
} |
|
1166 |
} |
|
1167 |
{ |
|
1168 |
int logIndex = textLine.visualToLogical(caret); |
|
1169 |
float angle2 = textLine.getCharAngle(logIndex); |
|
1170 |
float pos2 = textLine.getCharLinePosition(logIndex); |
|
1171 |
if (angle2 != 0) { |
|
1172 |
pos2 += angle2*textLine.getCharShift(logIndex); |
|
1173 |
top2X = pos2 + angle2*textLine.getCharAscent(logIndex); |
|
1174 |
bottom2X = pos2 - angle2*textLine.getCharDescent(logIndex); |
|
1175 |
} |
|
1176 |
else { |
|
1177 |
top2X = bottom2X = pos2; |
|
1178 |
} |
|
1179 |
} |
|
1180 |
} |
|
1181 |
||
1182 |
float topX = (top1X + top2X) / 2; |
|
1183 |
float bottomX = (bottom1X + bottom2X) / 2; |
|
1184 |
||
1185 |
if (info == null) { |
|
1186 |
info = new float[2]; |
|
1187 |
} |
|
1188 |
||
1189 |
if (isVerticalLine) { |
|
1190 |
info[1] = (float) ((topX - bottomX) / bounds.getWidth()); |
|
1191 |
info[0] = (float) (topX + (info[1]*bounds.getX())); |
|
1192 |
} |
|
1193 |
else { |
|
1194 |
info[1] = (float) ((topX - bottomX) / bounds.getHeight()); |
|
1195 |
info[0] = (float) (bottomX + (info[1]*bounds.getMaxY())); |
|
1196 |
} |
|
1197 |
||
1198 |
return info; |
|
1199 |
} |
|
1200 |
||
1201 |
/** |
|
1202 |
* Returns information about the caret corresponding to <code>hit</code>. |
|
1203 |
* The first element of the array is the intersection of the caret with |
|
1204 |
* the baseline, as a distance along the baseline. The second element |
|
1205 |
* of the array is the inverse slope (run/rise) of the caret, measured |
|
1206 |
* with respect to the baseline at that point. |
|
1207 |
* <p> |
|
1208 |
* This method is meant for informational use. To display carets, it |
|
1209 |
* is better to use <code>getCaretShapes</code>. |
|
1210 |
* @param hit a hit on a character in this <code>TextLayout</code> |
|
1211 |
* @param bounds the bounds to which the caret info is constructed. |
|
1212 |
* The bounds is in baseline-relative coordinates. |
|
1213 |
* @return a two-element array containing the position and slope of |
|
1214 |
* the caret. The returned caret info is in baseline-relative coordinates. |
|
1215 |
* @see #getCaretShapes(int, Rectangle2D, TextLayout.CaretPolicy) |
|
1216 |
* @see Font#getItalicAngle |
|
1217 |
*/ |
|
1218 |
public float[] getCaretInfo(TextHitInfo hit, Rectangle2D bounds) { |
|
1219 |
ensureCache(); |
|
1220 |
checkTextHit(hit); |
|
1221 |
||
1222 |
return getCaretInfoTestInternal(hit, bounds); |
|
1223 |
} |
|
1224 |
||
1225 |
// this version provides extra info in the float array |
|
1226 |
// the first two values are as above |
|
1227 |
// the next four values are the endpoints of the caret, as computed |
|
1228 |
// using the hit character's offset (baseline + ssoffset) and |
|
1229 |
// natural ascent and descent. |
|
1230 |
// these values are trimmed to the bounds where required to fit, |
|
1231 |
// but otherwise independent of it. |
|
1232 |
private float[] getCaretInfoTestInternal(TextHitInfo hit, Rectangle2D bounds) { |
|
1233 |
ensureCache(); |
|
1234 |
checkTextHit(hit); |
|
1235 |
||
1236 |
float[] info = new float[6]; |
|
1237 |
||
1238 |
// get old data first |
|
1239 |
getCaretInfo(hitToCaret(hit), bounds, info); |
|
1240 |
||
1241 |
// then add our new data |
|
1242 |
double iangle, ixbase, p1x, p1y, p2x, p2y; |
|
1243 |
||
1244 |
int charix = hit.getCharIndex(); |
|
1245 |
boolean lead = hit.isLeadingEdge(); |
|
1246 |
boolean ltr = textLine.isDirectionLTR(); |
|
1247 |
boolean horiz = !isVertical(); |
|
1248 |
||
1249 |
if (charix == -1 || charix == characterCount) { |
|
1250 |
// !!! note: want non-shifted, baseline ascent and descent here! |
|
1251 |
// TextLine should return appropriate line metrics object for these values |
|
1252 |
TextLineMetrics m = textLine.getMetrics(); |
|
1253 |
boolean low = ltr == (charix == -1); |
|
1254 |
iangle = 0; |
|
1255 |
if (horiz) { |
|
1256 |
p1x = p2x = low ? 0 : m.advance; |
|
1257 |
p1y = -m.ascent; |
|
1258 |
p2y = m.descent; |
|
1259 |
} else { |
|
1260 |
p1y = p2y = low ? 0 : m.advance; |
|
1261 |
p1x = m.descent; |
|
1262 |
p2x = m.ascent; |
|
1263 |
} |
|
1264 |
} else { |
|
1265 |
CoreMetrics thiscm = textLine.getCoreMetricsAt(charix); |
|
1266 |
iangle = thiscm.italicAngle; |
|
1267 |
ixbase = textLine.getCharLinePosition(charix, lead); |
|
1268 |
if (thiscm.baselineIndex < 0) { |
|
1269 |
// this is a graphic, no italics, use entire line height for caret |
|
1270 |
TextLineMetrics m = textLine.getMetrics(); |
|
1271 |
if (horiz) { |
|
1272 |
p1x = p2x = ixbase; |
|
1273 |
if (thiscm.baselineIndex == GraphicAttribute.TOP_ALIGNMENT) { |
|
1274 |
p1y = -m.ascent; |
|
1275 |
p2y = p1y + thiscm.height; |
|
1276 |
} else { |
|
1277 |
p2y = m.descent; |
|
1278 |
p1y = p2y - thiscm.height; |
|
1279 |
} |
|
1280 |
} else { |
|
1281 |
p1y = p2y = ixbase; |
|
1282 |
p1x = m.descent; |
|
1283 |
p2x = m.ascent; |
|
1284 |
// !!! top/bottom adjustment not implemented for vertical |
|
1285 |
} |
|
1286 |
} else { |
|
1287 |
float bo = baselineOffsets[thiscm.baselineIndex]; |
|
1288 |
if (horiz) { |
|
1289 |
ixbase += iangle * thiscm.ssOffset; |
|
1290 |
p1x = ixbase + iangle * thiscm.ascent; |
|
1291 |
p2x = ixbase - iangle * thiscm.descent; |
|
1292 |
p1y = bo - thiscm.ascent; |
|
1293 |
p2y = bo + thiscm.descent; |
|
1294 |
} else { |
|
1295 |
ixbase -= iangle * thiscm.ssOffset; |
|
1296 |
p1y = ixbase + iangle * thiscm.ascent; |
|
1297 |
p2y = ixbase - iangle * thiscm.descent; |
|
1298 |
p1x = bo + thiscm.ascent; |
|
1299 |
p2x = bo + thiscm.descent; |
|
1300 |
} |
|
1301 |
} |
|
1302 |
} |
|
1303 |
||
1304 |
info[2] = (float)p1x; |
|
1305 |
info[3] = (float)p1y; |
|
1306 |
info[4] = (float)p2x; |
|
1307 |
info[5] = (float)p2y; |
|
1308 |
||
1309 |
return info; |
|
1310 |
} |
|
1311 |
||
1312 |
/** |
|
1313 |
* Returns information about the caret corresponding to <code>hit</code>. |
|
1314 |
* This method is a convenience overload of <code>getCaretInfo</code> and |
|
1315 |
* uses the natural bounds of this <code>TextLayout</code>. |
|
1316 |
* @param hit a hit on a character in this <code>TextLayout</code> |
|
1317 |
* @return the information about a caret corresponding to a hit. The |
|
1318 |
* returned caret info is in baseline-relative coordinates. |
|
1319 |
*/ |
|
1320 |
public float[] getCaretInfo(TextHitInfo hit) { |
|
1321 |
||
1322 |
return getCaretInfo(hit, getNaturalBounds()); |
|
1323 |
} |
|
1324 |
||
1325 |
/** |
|
1326 |
* Returns a caret index corresponding to <code>hit</code>. |
|
1327 |
* Carets are numbered from left to right (top to bottom) starting from |
|
1328 |
* zero. This always places carets next to the character hit, on the |
|
1329 |
* indicated side of the character. |
|
1330 |
* @param hit a hit on a character in this <code>TextLayout</code> |
|
1331 |
* @return a caret index corresponding to the specified hit. |
|
1332 |
*/ |
|
1333 |
private int hitToCaret(TextHitInfo hit) { |
|
1334 |
||
1335 |
int hitIndex = hit.getCharIndex(); |
|
1336 |
||
1337 |
if (hitIndex < 0) { |
|
1338 |
return textLine.isDirectionLTR() ? 0 : characterCount; |
|
1339 |
} else if (hitIndex >= characterCount) { |
|
1340 |
return textLine.isDirectionLTR() ? characterCount : 0; |
|
1341 |
} |
|
1342 |
||
1343 |
int visIndex = textLine.logicalToVisual(hitIndex); |
|
1344 |
||
1345 |
if (hit.isLeadingEdge() != textLine.isCharLTR(hitIndex)) { |
|
1346 |
++visIndex; |
|
1347 |
} |
|
1348 |
||
1349 |
return visIndex; |
|
1350 |
} |
|
1351 |
||
1352 |
/** |
|
1353 |
* Given a caret index, return a hit whose caret is at the index. |
|
1354 |
* The hit is NOT guaranteed to be strong!!! |
|
1355 |
* |
|
1356 |
* @param caret a caret index. |
|
1357 |
* @return a hit on this layout whose strong caret is at the requested |
|
1358 |
* index. |
|
1359 |
*/ |
|
1360 |
private TextHitInfo caretToHit(int caret) { |
|
1361 |
||
1362 |
if (caret == 0 || caret == characterCount) { |
|
1363 |
||
1364 |
if ((caret == characterCount) == textLine.isDirectionLTR()) { |
|
1365 |
return TextHitInfo.leading(characterCount); |
|
1366 |
} |
|
1367 |
else { |
|
1368 |
return TextHitInfo.trailing(-1); |
|
1369 |
} |
|
1370 |
} |
|
1371 |
else { |
|
1372 |
||
1373 |
int charIndex = textLine.visualToLogical(caret); |
|
1374 |
boolean leading = textLine.isCharLTR(charIndex); |
|
1375 |
||
1376 |
return leading? TextHitInfo.leading(charIndex) |
|
1377 |
: TextHitInfo.trailing(charIndex); |
|
1378 |
} |
|
1379 |
} |
|
1380 |
||
1381 |
private boolean caretIsValid(int caret) { |
|
1382 |
||
1383 |
if (caret == characterCount || caret == 0) { |
|
1384 |
return true; |
|
1385 |
} |
|
1386 |
||
1387 |
int offset = textLine.visualToLogical(caret); |
|
1388 |
||
1389 |
if (!textLine.isCharLTR(offset)) { |
|
1390 |
offset = textLine.visualToLogical(caret-1); |
|
1391 |
if (textLine.isCharLTR(offset)) { |
|
1392 |
return true; |
|
1393 |
} |
|
1394 |
} |
|
1395 |
||
1396 |
// At this point, the leading edge of the character |
|
1397 |
// at offset is at the given caret. |
|
1398 |
||
1399 |
return textLine.caretAtOffsetIsValid(offset); |
|
1400 |
} |
|
1401 |
||
1402 |
/** |
|
1403 |
* Returns the hit for the next caret to the right (bottom); if there |
|
1404 |
* is no such hit, returns <code>null</code>. |
|
1405 |
* If the hit character index is out of bounds, an |
|
1406 |
* {@link IllegalArgumentException} is thrown. |
|
1407 |
* @param hit a hit on a character in this layout |
|
1408 |
* @return a hit whose caret appears at the next position to the |
|
1409 |
* right (bottom) of the caret of the provided hit or <code>null</code>. |
|
1410 |
*/ |
|
1411 |
public TextHitInfo getNextRightHit(TextHitInfo hit) { |
|
1412 |
ensureCache(); |
|
1413 |
checkTextHit(hit); |
|
1414 |
||
1415 |
int caret = hitToCaret(hit); |
|
1416 |
||
1417 |
if (caret == characterCount) { |
|
1418 |
return null; |
|
1419 |
} |
|
1420 |
||
1421 |
do { |
|
1422 |
++caret; |
|
1423 |
} while (!caretIsValid(caret)); |
|
1424 |
||
1425 |
return caretToHit(caret); |
|
1426 |
} |
|
1427 |
||
1428 |
/** |
|
1429 |
* Returns the hit for the next caret to the right (bottom); if no |
|
1430 |
* such hit, returns <code>null</code>. The hit is to the right of |
|
1431 |
* the strong caret at the specified offset, as determined by the |
|
1432 |
* specified policy. |
|
1433 |
* The returned hit is the stronger of the two possible |
|
1434 |
* hits, as determined by the specified policy. |
|
1435 |
* @param offset an insertion offset in this <code>TextLayout</code>. |
|
1436 |
* Cannot be less than 0 or greater than this <code>TextLayout</code> |
|
1437 |
* object's character count. |
|
1438 |
* @param policy the policy used to select the strong caret |
|
1439 |
* @return a hit whose caret appears at the next position to the |
|
1440 |
* right (bottom) of the caret of the provided hit, or <code>null</code>. |
|
1441 |
*/ |
|
1442 |
public TextHitInfo getNextRightHit(int offset, CaretPolicy policy) { |
|
1443 |
||
1444 |
if (offset < 0 || offset > characterCount) { |
|
1445 |
throw new IllegalArgumentException("Offset out of bounds in TextLayout.getNextRightHit()"); |
|
1446 |
} |
|
1447 |
||
1448 |
if (policy == null) { |
|
1449 |
throw new IllegalArgumentException("Null CaretPolicy passed to TextLayout.getNextRightHit()"); |
|
1450 |
} |
|
1451 |
||
1452 |
TextHitInfo hit1 = TextHitInfo.afterOffset(offset); |
|
1453 |
TextHitInfo hit2 = hit1.getOtherHit(); |
|
1454 |
||
1455 |
TextHitInfo nextHit = getNextRightHit(policy.getStrongCaret(hit1, hit2, this)); |
|
1456 |
||
1457 |
if (nextHit != null) { |
|
1458 |
TextHitInfo otherHit = getVisualOtherHit(nextHit); |
|
1459 |
return policy.getStrongCaret(otherHit, nextHit, this); |
|
1460 |
} |
|
1461 |
else { |
|
1462 |
return null; |
|
1463 |
} |
|
1464 |
} |
|
1465 |
||
1466 |
/** |
|
1467 |
* Returns the hit for the next caret to the right (bottom); if no |
|
1468 |
* such hit, returns <code>null</code>. The hit is to the right of |
|
1469 |
* the strong caret at the specified offset, as determined by the |
|
1470 |
* default policy. |
|
1471 |
* The returned hit is the stronger of the two possible |
|
1472 |
* hits, as determined by the default policy. |
|
1473 |
* @param offset an insertion offset in this <code>TextLayout</code>. |
|
1474 |
* Cannot be less than 0 or greater than the <code>TextLayout</code> |
|
1475 |
* object's character count. |
|
1476 |
* @return a hit whose caret appears at the next position to the |
|
1477 |
* right (bottom) of the caret of the provided hit, or <code>null</code>. |
|
1478 |
*/ |
|
1479 |
public TextHitInfo getNextRightHit(int offset) { |
|
1480 |
||
1481 |
return getNextRightHit(offset, DEFAULT_CARET_POLICY); |
|
1482 |
} |
|
1483 |
||
1484 |
/** |
|
1485 |
* Returns the hit for the next caret to the left (top); if no such |
|
1486 |
* hit, returns <code>null</code>. |
|
1487 |
* If the hit character index is out of bounds, an |
|
1488 |
* <code>IllegalArgumentException</code> is thrown. |
|
1489 |
* @param hit a hit on a character in this <code>TextLayout</code>. |
|
1490 |
* @return a hit whose caret appears at the next position to the |
|
1491 |
* left (top) of the caret of the provided hit, or <code>null</code>. |
|
1492 |
*/ |
|
1493 |
public TextHitInfo getNextLeftHit(TextHitInfo hit) { |
|
1494 |
ensureCache(); |
|
1495 |
checkTextHit(hit); |
|
1496 |
||
1497 |
int caret = hitToCaret(hit); |
|
1498 |
||
1499 |
if (caret == 0) { |
|
1500 |
return null; |
|
1501 |
} |
|
1502 |
||
1503 |
do { |
|
1504 |
--caret; |
|
1505 |
} while(!caretIsValid(caret)); |
|
1506 |
||
1507 |
return caretToHit(caret); |
|
1508 |
} |
|
1509 |
||
1510 |
/** |
|
1511 |
* Returns the hit for the next caret to the left (top); if no |
|
1512 |
* such hit, returns <code>null</code>. The hit is to the left of |
|
1513 |
* the strong caret at the specified offset, as determined by the |
|
1514 |
* specified policy. |
|
1515 |
* The returned hit is the stronger of the two possible |
|
1516 |
* hits, as determined by the specified policy. |
|
1517 |
* @param offset an insertion offset in this <code>TextLayout</code>. |
|
1518 |
* Cannot be less than 0 or greater than this <code>TextLayout</code> |
|
1519 |
* object's character count. |
|
1520 |
* @param policy the policy used to select the strong caret |
|
1521 |
* @return a hit whose caret appears at the next position to the |
|
1522 |
* left (top) of the caret of the provided hit, or <code>null</code>. |
|
1523 |
*/ |
|
1524 |
public TextHitInfo getNextLeftHit(int offset, CaretPolicy policy) { |
|
1525 |
||
1526 |
if (policy == null) { |
|
1527 |
throw new IllegalArgumentException("Null CaretPolicy passed to TextLayout.getNextLeftHit()"); |
|
1528 |
} |
|
1529 |
||
1530 |
if (offset < 0 || offset > characterCount) { |
|
1531 |
throw new IllegalArgumentException("Offset out of bounds in TextLayout.getNextLeftHit()"); |
|
1532 |
} |
|
1533 |
||
1534 |
TextHitInfo hit1 = TextHitInfo.afterOffset(offset); |
|
1535 |
TextHitInfo hit2 = hit1.getOtherHit(); |
|
1536 |
||
1537 |
TextHitInfo nextHit = getNextLeftHit(policy.getStrongCaret(hit1, hit2, this)); |
|
1538 |
||
1539 |
if (nextHit != null) { |
|
1540 |
TextHitInfo otherHit = getVisualOtherHit(nextHit); |
|
1541 |
return policy.getStrongCaret(otherHit, nextHit, this); |
|
1542 |
} |
|
1543 |
else { |
|
1544 |
return null; |
|
1545 |
} |
|
1546 |
} |
|
1547 |
||
1548 |
/** |
|
1549 |
* Returns the hit for the next caret to the left (top); if no |
|
1550 |
* such hit, returns <code>null</code>. The hit is to the left of |
|
1551 |
* the strong caret at the specified offset, as determined by the |
|
1552 |
* default policy. |
|
1553 |
* The returned hit is the stronger of the two possible |
|
1554 |
* hits, as determined by the default policy. |
|
1555 |
* @param offset an insertion offset in this <code>TextLayout</code>. |
|
1556 |
* Cannot be less than 0 or greater than this <code>TextLayout</code> |
|
1557 |
* object's character count. |
|
1558 |
* @return a hit whose caret appears at the next position to the |
|
1559 |
* left (top) of the caret of the provided hit, or <code>null</code>. |
|
1560 |
*/ |
|
1561 |
public TextHitInfo getNextLeftHit(int offset) { |
|
1562 |
||
1563 |
return getNextLeftHit(offset, DEFAULT_CARET_POLICY); |
|
1564 |
} |
|
1565 |
||
1566 |
/** |
|
1567 |
* Returns the hit on the opposite side of the specified hit's caret. |
|
1568 |
* @param hit the specified hit |
|
1569 |
* @return a hit that is on the opposite side of the specified hit's |
|
1570 |
* caret. |
|
1571 |
*/ |
|
1572 |
public TextHitInfo getVisualOtherHit(TextHitInfo hit) { |
|
1573 |
||
1574 |
ensureCache(); |
|
1575 |
checkTextHit(hit); |
|
1576 |
||
1577 |
int hitCharIndex = hit.getCharIndex(); |
|
1578 |
||
1579 |
int charIndex; |
|
1580 |
boolean leading; |
|
1581 |
||
1582 |
if (hitCharIndex == -1 || hitCharIndex == characterCount) { |
|
1583 |
||
1584 |
int visIndex; |
|
1585 |
if (textLine.isDirectionLTR() == (hitCharIndex == -1)) { |
|
1586 |
visIndex = 0; |
|
1587 |
} |
|
1588 |
else { |
|
1589 |
visIndex = characterCount-1; |
|
1590 |
} |
|
1591 |
||
1592 |
charIndex = textLine.visualToLogical(visIndex); |
|
1593 |
||
1594 |
if (textLine.isDirectionLTR() == (hitCharIndex == -1)) { |
|
1595 |
// at left end |
|
1596 |
leading = textLine.isCharLTR(charIndex); |
|
1597 |
} |
|
1598 |
else { |
|
1599 |
// at right end |
|
1600 |
leading = !textLine.isCharLTR(charIndex); |
|
1601 |
} |
|
1602 |
} |
|
1603 |
else { |
|
1604 |
||
1605 |
int visIndex = textLine.logicalToVisual(hitCharIndex); |
|
1606 |
||
1607 |
boolean movedToRight; |
|
1608 |
if (textLine.isCharLTR(hitCharIndex) == hit.isLeadingEdge()) { |
|
1609 |
--visIndex; |
|
1610 |
movedToRight = false; |
|
1611 |
} |
|
1612 |
else { |
|
1613 |
++visIndex; |
|
1614 |
movedToRight = true; |
|
1615 |
} |
|
1616 |
||
1617 |
if (visIndex > -1 && visIndex < characterCount) { |
|
1618 |
charIndex = textLine.visualToLogical(visIndex); |
|
1619 |
leading = movedToRight == textLine.isCharLTR(charIndex); |
|
1620 |
} |
|
1621 |
else { |
|
1622 |
charIndex = |
|
1623 |
(movedToRight == textLine.isDirectionLTR())? characterCount : -1; |
|
1624 |
leading = charIndex == characterCount; |
|
1625 |
} |
|
1626 |
} |
|
1627 |
||
1628 |
return leading? TextHitInfo.leading(charIndex) : |
|
1629 |
TextHitInfo.trailing(charIndex); |
|
1630 |
} |
|
1631 |
||
1632 |
private double[] getCaretPath(TextHitInfo hit, Rectangle2D bounds) { |
|
1633 |
float[] info = getCaretInfo(hit, bounds); |
|
1634 |
return new double[] { info[2], info[3], info[4], info[5] }; |
|
1635 |
} |
|
1636 |
||
1637 |
/** |
|
1638 |
* Return an array of four floats corresponding the endpoints of the caret |
|
1639 |
* x0, y0, x1, y1. |
|
1640 |
* |
|
1641 |
* This creates a line along the slope of the caret intersecting the |
|
1642 |
* baseline at the caret |
|
1643 |
* position, and extending from ascent above the baseline to descent below |
|
1644 |
* it. |
|
1645 |
*/ |
|
1646 |
private double[] getCaretPath(int caret, Rectangle2D bounds, |
|
1647 |
boolean clipToBounds) { |
|
1648 |
||
1649 |
float[] info = getCaretInfo(caret, bounds, null); |
|
1650 |
||
1651 |
double pos = info[0]; |
|
1652 |
double slope = info[1]; |
|
1653 |
||
1654 |
double x0, y0, x1, y1; |
|
1655 |
double x2 = -3141.59, y2 = -2.7; // values are there to make compiler happy |
|
1656 |
||
1657 |
double left = bounds.getX(); |
|
1658 |
double right = left + bounds.getWidth(); |
|
1659 |
double top = bounds.getY(); |
|
1660 |
double bottom = top + bounds.getHeight(); |
|
1661 |
||
1662 |
boolean threePoints = false; |
|
1663 |
||
1664 |
if (isVerticalLine) { |
|
1665 |
||
1666 |
if (slope >= 0) { |
|
1667 |
x0 = left; |
|
1668 |
x1 = right; |
|
1669 |
} |
|
1670 |
else { |
|
1671 |
x1 = left; |
|
1672 |
x0 = right; |
|
1673 |
} |
|
1674 |
||
1675 |
y0 = pos + x0 * slope; |
|
1676 |
y1 = pos + x1 * slope; |
|
1677 |
||
1678 |
// y0 <= y1, always |
|
1679 |
||
1680 |
if (clipToBounds) { |
|
1681 |
if (y0 < top) { |
|
1682 |
if (slope <= 0 || y1 <= top) { |
|
1683 |
y0 = y1 = top; |
|
1684 |
} |
|
1685 |
else { |
|
1686 |
threePoints = true; |
|
1687 |
y0 = top; |
|
1688 |
y2 = top; |
|
1689 |
x2 = x1 + (top-y1)/slope; |
|
1690 |
if (y1 > bottom) { |
|
1691 |
y1 = bottom; |
|
1692 |
} |
|
1693 |
} |
|
1694 |
} |
|
1695 |
else if (y1 > bottom) { |
|
1696 |
if (slope >= 0 || y0 >= bottom) { |
|
1697 |
y0 = y1 = bottom; |
|
1698 |
} |
|
1699 |
else { |
|
1700 |
threePoints = true; |
|
1701 |
y1 = bottom; |
|
1702 |
y2 = bottom; |
|
1703 |
x2 = x0 + (bottom-x1)/slope; |
|
1704 |
} |
|
1705 |
} |
|
1706 |
} |
|
1707 |
||
1708 |
} |
|
1709 |
else { |
|
1710 |
||
1711 |
if (slope >= 0) { |
|
1712 |
y0 = bottom; |
|
1713 |
y1 = top; |
|
1714 |
} |
|
1715 |
else { |
|
1716 |
y1 = bottom; |
|
1717 |
y0 = top; |
|
1718 |
} |
|
1719 |
||
1720 |
x0 = pos - y0 * slope; |
|
1721 |
x1 = pos - y1 * slope; |
|
1722 |
||
1723 |
// x0 <= x1, always |
|
1724 |
||
1725 |
if (clipToBounds) { |
|
1726 |
if (x0 < left) { |
|
1727 |
if (slope <= 0 || x1 <= left) { |
|
1728 |
x0 = x1 = left; |
|
1729 |
} |
|
1730 |
else { |
|
1731 |
threePoints = true; |
|
1732 |
x0 = left; |
|
1733 |
x2 = left; |
|
1734 |
y2 = y1 - (left-x1)/slope; |
|
1735 |
if (x1 > right) { |
|
1736 |
x1 = right; |
|
1737 |
} |
|
1738 |
} |
|
1739 |
} |
|
1740 |
else if (x1 > right) { |
|
1741 |
if (slope >= 0 || x0 >= right) { |
|
1742 |
x0 = x1 = right; |
|
1743 |
} |
|
1744 |
else { |
|
1745 |
threePoints = true; |
|
1746 |
x1 = right; |
|
1747 |
x2 = right; |
|
1748 |
y2 = y0 - (right-x0)/slope; |
|
1749 |
} |
|
1750 |
} |
|
1751 |
} |
|
1752 |
} |
|
1753 |
||
1754 |
return threePoints? |
|
1755 |
new double[] { x0, y0, x2, y2, x1, y1 } : |
|
1756 |
new double[] { x0, y0, x1, y1 }; |
|
1757 |
} |
|
1758 |
||
1759 |
||
1760 |
private static GeneralPath pathToShape(double[] path, boolean close, LayoutPathImpl lp) { |
|
1761 |
GeneralPath result = new GeneralPath(GeneralPath.WIND_EVEN_ODD, path.length); |
|
1762 |
result.moveTo((float)path[0], (float)path[1]); |
|
1763 |
for (int i = 2; i < path.length; i += 2) { |
|
1764 |
result.lineTo((float)path[i], (float)path[i+1]); |
|
1765 |
} |
|
1766 |
if (close) { |
|
1767 |
result.closePath(); |
|
1768 |
} |
|
1769 |
||
1770 |
if (lp != null) { |
|
1771 |
result = (GeneralPath)lp.mapShape(result); |
|
1772 |
} |
|
1773 |
return result; |
|
1774 |
} |
|
1775 |
||
1776 |
/** |
|
1777 |
* Returns a {@link Shape} representing the caret at the specified |
|
1778 |
* hit inside the specified bounds. |
|
1779 |
* @param hit the hit at which to generate the caret |
|
1780 |
* @param bounds the bounds of the <code>TextLayout</code> to use |
|
1781 |
* in generating the caret. The bounds is in baseline-relative |
|
1782 |
* coordinates. |
|
1783 |
* @return a <code>Shape</code> representing the caret. The returned |
|
1784 |
* shape is in standard coordinates. |
|
1785 |
*/ |
|
1786 |
public Shape getCaretShape(TextHitInfo hit, Rectangle2D bounds) { |
|
1787 |
ensureCache(); |
|
1788 |
checkTextHit(hit); |
|
1789 |
||
1790 |
if (bounds == null) { |
|
1791 |
throw new IllegalArgumentException("Null Rectangle2D passed to TextLayout.getCaret()"); |
|
1792 |
} |
|
1793 |
||
1794 |
return pathToShape(getCaretPath(hit, bounds), false, textLine.getLayoutPath()); |
|
1795 |
} |
|
1796 |
||
1797 |
/** |
|
1798 |
* Returns a <code>Shape</code> representing the caret at the specified |
|
1799 |
* hit inside the natural bounds of this <code>TextLayout</code>. |
|
1800 |
* @param hit the hit at which to generate the caret |
|
1801 |
* @return a <code>Shape</code> representing the caret. The returned |
|
1802 |
* shape is in standard coordinates. |
|
1803 |
*/ |
|
1804 |
public Shape getCaretShape(TextHitInfo hit) { |
|
1805 |
||
1806 |
return getCaretShape(hit, getNaturalBounds()); |
|
1807 |
} |
|
1808 |
||
1809 |
/** |
|
1810 |
* Return the "stronger" of the TextHitInfos. The TextHitInfos |
|
1811 |
* should be logical or visual counterparts. They are not |
|
1812 |
* checked for validity. |
|
1813 |
*/ |
|
1814 |
private final TextHitInfo getStrongHit(TextHitInfo hit1, TextHitInfo hit2) { |
|
1815 |
||
1816 |
// right now we're using the following rule for strong hits: |
|
1817 |
// A hit on a character with a lower level |
|
1818 |
// is stronger than one on a character with a higher level. |
|
1819 |
// If this rule ties, the hit on the leading edge of a character wins. |
|
1820 |
// If THIS rule ties, hit1 wins. Both rules shouldn't tie, unless the |
|
1821 |
// infos aren't counterparts of some sort. |
|
1822 |
||
1823 |
byte hit1Level = getCharacterLevel(hit1.getCharIndex()); |
|
1824 |
byte hit2Level = getCharacterLevel(hit2.getCharIndex()); |
|
1825 |
||
1826 |
if (hit1Level == hit2Level) { |
|
1827 |
if (hit2.isLeadingEdge() && !hit1.isLeadingEdge()) { |
|
1828 |
return hit2; |
|
1829 |
} |
|
1830 |
else { |
|
1831 |
return hit1; |
|
1832 |
} |
|
1833 |
} |
|
1834 |
else { |
|
1835 |
return (hit1Level < hit2Level)? hit1 : hit2; |
|
1836 |
} |
|
1837 |
} |
|
1838 |
||
1839 |
/** |
|
1840 |
* Returns the level of the character at <code>index</code>. |
|
1841 |
* Indices -1 and <code>characterCount</code> are assigned the base |
|
1842 |
* level of this <code>TextLayout</code>. |
|
1843 |
* @param index the index of the character from which to get the level |
|
1844 |
* @return the level of the character at the specified index. |
|
1845 |
*/ |
|
1846 |
public byte getCharacterLevel(int index) { |
|
1847 |
||
1848 |
// hmm, allow indices at endpoints? For now, yes. |
|
1849 |
if (index < -1 || index > characterCount) { |
|
1850 |
throw new IllegalArgumentException("Index is out of range in getCharacterLevel."); |
|
1851 |
} |
|
1852 |
||
1853 |
ensureCache(); |
|
1854 |
if (index == -1 || index == characterCount) { |
|
1855 |
return (byte) (textLine.isDirectionLTR()? 0 : 1); |
|
1856 |
} |
|
1857 |
||
1858 |
return textLine.getCharLevel(index); |
|
1859 |
} |
|
1860 |
||
1861 |
/** |
|
1862 |
* Returns two paths corresponding to the strong and weak caret. |
|
1863 |
* @param offset an offset in this <code>TextLayout</code> |
|
1864 |
* @param bounds the bounds to which to extend the carets. The |
|
1865 |
* bounds is in baseline-relative coordinates. |
|
1866 |
* @param policy the specified <code>CaretPolicy</code> |
|
1867 |
* @return an array of two paths. Element zero is the strong |
|
1868 |
* caret. If there are two carets, element one is the weak caret, |
|
1869 |
* otherwise it is <code>null</code>. The returned shapes |
|
1870 |
* are in standard coordinates. |
|
1871 |
*/ |
|
1872 |
public Shape[] getCaretShapes(int offset, Rectangle2D bounds, CaretPolicy policy) { |
|
1873 |
||
1874 |
ensureCache(); |
|
1875 |
||
1876 |
if (offset < 0 || offset > characterCount) { |
|
1877 |
throw new IllegalArgumentException("Offset out of bounds in TextLayout.getCaretShapes()"); |
|
1878 |
} |
|
1879 |
||
1880 |
if (bounds == null) { |
|
1881 |
throw new IllegalArgumentException("Null Rectangle2D passed to TextLayout.getCaretShapes()"); |
|
1882 |
} |
|
1883 |
||
1884 |
if (policy == null) { |
|
1885 |
throw new IllegalArgumentException("Null CaretPolicy passed to TextLayout.getCaretShapes()"); |
|
1886 |
} |
|
1887 |
||
1888 |
Shape[] result = new Shape[2]; |
|
1889 |
||
1890 |
TextHitInfo hit = TextHitInfo.afterOffset(offset); |
|
1891 |
||
1892 |
int hitCaret = hitToCaret(hit); |
|
1893 |
||
1894 |
LayoutPathImpl lp = textLine.getLayoutPath(); |
|
1895 |
Shape hitShape = pathToShape(getCaretPath(hit, bounds), false, lp); |
|
1896 |
TextHitInfo otherHit = hit.getOtherHit(); |
|
1897 |
int otherCaret = hitToCaret(otherHit); |
|
1898 |
||
1899 |
if (hitCaret == otherCaret) { |
|
1900 |
result[0] = hitShape; |
|
1901 |
} |
|
1902 |
else { // more than one caret |
|
1903 |
Shape otherShape = pathToShape(getCaretPath(otherHit, bounds), false, lp); |
|
1904 |
||
1905 |
TextHitInfo strongHit = policy.getStrongCaret(hit, otherHit, this); |
|
1906 |
boolean hitIsStrong = strongHit.equals(hit); |
|
1907 |
||
1908 |
if (hitIsStrong) {// then other is weak |
|
1909 |
result[0] = hitShape; |
|
1910 |
result[1] = otherShape; |
|
1911 |
} |
|
1912 |
else { |
|
1913 |
result[0] = otherShape; |
|
1914 |
result[1] = hitShape; |
|
1915 |
} |
|
1916 |
} |
|
1917 |
||
1918 |
return result; |
|
1919 |
} |
|
1920 |
||
1921 |
/** |
|
1922 |
* Returns two paths corresponding to the strong and weak caret. |
|
1923 |
* This method is a convenience overload of <code>getCaretShapes</code> |
|
1924 |
* that uses the default caret policy. |
|
1925 |
* @param offset an offset in this <code>TextLayout</code> |
|
1926 |
* @param bounds the bounds to which to extend the carets. This is |
|
1927 |
* in baseline-relative coordinates. |
|
1928 |
* @return two paths corresponding to the strong and weak caret as |
|
1929 |
* defined by the <code>DEFAULT_CARET_POLICY</code>. These are |
|
1930 |
* in standard coordinates. |
|
1931 |
*/ |
|
1932 |
public Shape[] getCaretShapes(int offset, Rectangle2D bounds) { |
|
1933 |
// {sfb} parameter checking is done in overloaded version |
|
1934 |
return getCaretShapes(offset, bounds, DEFAULT_CARET_POLICY); |
|
1935 |
} |
|
1936 |
||
1937 |
/** |
|
1938 |
* Returns two paths corresponding to the strong and weak caret. |
|
1939 |
* This method is a convenience overload of <code>getCaretShapes</code> |
|
1940 |
* that uses the default caret policy and this <code>TextLayout</code> |
|
1941 |
* object's natural bounds. |
|
1942 |
* @param offset an offset in this <code>TextLayout</code> |
|
1943 |
* @return two paths corresponding to the strong and weak caret as |
|
1944 |
* defined by the <code>DEFAULT_CARET_POLICY</code>. These are |
|
1945 |
* in standard coordinates. |
|
1946 |
*/ |
|
1947 |
public Shape[] getCaretShapes(int offset) { |
|
1948 |
// {sfb} parameter checking is done in overloaded version |
|
1949 |
return getCaretShapes(offset, getNaturalBounds(), DEFAULT_CARET_POLICY); |
|
1950 |
} |
|
1951 |
||
1952 |
// A utility to return a path enclosing the given path |
|
1953 |
// Path0 must be left or top of path1 |
|
1954 |
// {jbr} no assumptions about size of path0, path1 anymore. |
|
1955 |
private GeneralPath boundingShape(double[] path0, double[] path1) { |
|
1956 |
||
1957 |
// Really, we want the path to be a convex hull around all of the |
|
1958 |
// points in path0 and path1. But we can get by with less than |
|
1959 |
// that. We do need to prevent the two segments which |
|
1960 |
// join path0 to path1 from crossing each other. So, if we |
|
1961 |
// traverse path0 from top to bottom, we'll traverse path1 from |
|
1962 |
// bottom to top (and vice versa). |
|
1963 |
||
1964 |
GeneralPath result = pathToShape(path0, false, null); |
|
1965 |
||
1966 |
boolean sameDirection; |
|
1967 |
||
1968 |
if (isVerticalLine) { |
|
1969 |
sameDirection = (path0[1] > path0[path0.length-1]) == |
|
1970 |
(path1[1] > path1[path1.length-1]); |
|
1971 |
} |
|
1972 |
else { |
|
1973 |
sameDirection = (path0[0] > path0[path0.length-2]) == |
|
1974 |
(path1[0] > path1[path1.length-2]); |
|
1975 |
} |
|
1976 |
||
1977 |
int start; |
|
1978 |
int limit; |
|
1979 |
int increment; |
|
1980 |
||
1981 |
if (sameDirection) { |
|
1982 |
start = path1.length-2; |
|
1983 |
limit = -2; |
|
1984 |
increment = -2; |
|
1985 |
} |
|
1986 |
else { |
|
1987 |
start = 0; |
|
1988 |
limit = path1.length; |
|
1989 |
increment = 2; |
|
1990 |
} |
|
1991 |
||
1992 |
for (int i = start; i != limit; i += increment) { |
|
1993 |
result.lineTo((float)path1[i], (float)path1[i+1]); |
|
1994 |
} |
|
1995 |
||
1996 |
result.closePath(); |
|
1997 |
||
1998 |
return result; |
|
1999 |
} |
|
2000 |
||
2001 |
// A utility to convert a pair of carets into a bounding path |
|
2002 |
// {jbr} Shape is never outside of bounds. |
|
2003 |
private GeneralPath caretBoundingShape(int caret0, |
|
2004 |
int caret1, |
|
2005 |
Rectangle2D bounds) { |
|
2006 |
||
2007 |
if (caret0 > caret1) { |
|
2008 |
int temp = caret0; |
|
2009 |
caret0 = caret1; |
|
2010 |
caret1 = temp; |
|
2011 |
} |
|
2012 |
||
2013 |
return boundingShape(getCaretPath(caret0, bounds, true), |
|
2014 |
getCaretPath(caret1, bounds, true)); |
|
2015 |
} |
|
2016 |
||
2017 |
/* |
|
2018 |
* A utility to return the path bounding the area to the left (top) of the |
|
2019 |
* layout. |
|
2020 |
* Shape is never outside of bounds. |
|
2021 |
*/ |
|
2022 |
private GeneralPath leftShape(Rectangle2D bounds) { |
|
2023 |
||
2024 |
double[] path0; |
|
2025 |
if (isVerticalLine) { |
|
2026 |
path0 = new double[] { bounds.getX(), bounds.getY(), |
|
2027 |
bounds.getX() + bounds.getWidth(), |
|
2028 |
bounds.getY() }; |
|
2029 |
} else { |
|
2030 |
path0 = new double[] { bounds.getX(), |
|
2031 |
bounds.getY() + bounds.getHeight(), |
|
2032 |
bounds.getX(), bounds.getY() }; |
|
2033 |
} |
|
2034 |
||
2035 |
double[] path1 = getCaretPath(0, bounds, true); |
|
2036 |
||
2037 |
return boundingShape(path0, path1); |
|
2038 |
} |
|
2039 |
||
2040 |
/* |
|
2041 |
* A utility to return the path bounding the area to the right (bottom) of |
|
2042 |
* the layout. |
|
2043 |
*/ |
|
2044 |
private GeneralPath rightShape(Rectangle2D bounds) { |
|
2045 |
double[] path1; |
|
2046 |
if (isVerticalLine) { |
|
2047 |
path1 = new double[] { |
|
2048 |
bounds.getX(), |
|
2049 |
bounds.getY() + bounds.getHeight(), |
|
2050 |
bounds.getX() + bounds.getWidth(), |
|
2051 |
bounds.getY() + bounds.getHeight() |
|
2052 |
}; |
|
2053 |
} else { |
|
2054 |
path1 = new double[] { |
|
2055 |
bounds.getX() + bounds.getWidth(), |
|
2056 |
bounds.getY() + bounds.getHeight(), |
|
2057 |
bounds.getX() + bounds.getWidth(), |
|
2058 |
bounds.getY() |
|
2059 |
}; |
|
2060 |
} |
|
2061 |
||
2062 |
double[] path0 = getCaretPath(characterCount, bounds, true); |
|
2063 |
||
2064 |
return boundingShape(path0, path1); |
|
2065 |
} |
|
2066 |
||
2067 |
/** |
|
2068 |
* Returns the logical ranges of text corresponding to a visual selection. |
|
2069 |
* @param firstEndpoint an endpoint of the visual range |
|
2070 |
* @param secondEndpoint the other endpoint of the visual range. |
|
2071 |
* This endpoint can be less than <code>firstEndpoint</code>. |
|
2072 |
* @return an array of integers representing start/limit pairs for the |
|
2073 |
* selected ranges. |
|
2074 |
* @see #getVisualHighlightShape(TextHitInfo, TextHitInfo, Rectangle2D) |
|
2075 |
*/ |
|
2076 |
public int[] getLogicalRangesForVisualSelection(TextHitInfo firstEndpoint, |
|
2077 |
TextHitInfo secondEndpoint) { |
|
2078 |
ensureCache(); |
|
2079 |
||
2080 |
checkTextHit(firstEndpoint); |
|
2081 |
checkTextHit(secondEndpoint); |
|
2082 |
||
2083 |
// !!! probably want to optimize for all LTR text |
|
2084 |
||
2085 |
boolean[] included = new boolean[characterCount]; |
|
2086 |
||
2087 |
int startIndex = hitToCaret(firstEndpoint); |
|
2088 |
int limitIndex = hitToCaret(secondEndpoint); |
|
2089 |
||
2090 |
if (startIndex > limitIndex) { |
|
2091 |
int t = startIndex; |
|
2092 |
startIndex = limitIndex; |
|
2093 |
limitIndex = t; |
|
2094 |
} |
|
2095 |
||
2096 |
/* |
|
2097 |
* now we have the visual indexes of the glyphs at the start and limit |
|
2098 |
* of the selection range walk through runs marking characters that |
|
2099 |
* were included in the visual range there is probably a more efficient |
|
2100 |
* way to do this, but this ought to work, so hey |
|
2101 |
*/ |
|
2102 |
||
2103 |
if (startIndex < limitIndex) { |
|
2104 |
int visIndex = startIndex; |
|
2105 |
while (visIndex < limitIndex) { |
|
2106 |
included[textLine.visualToLogical(visIndex)] = true; |
|
2107 |
++visIndex; |
|
2108 |
} |
|
2109 |
} |
|
2110 |
||
2111 |
/* |
|
2112 |
* count how many runs we have, ought to be one or two, but perhaps |
|
2113 |
* things are especially weird |
|
2114 |
*/ |
|
2115 |
int count = 0; |
|
2116 |
boolean inrun = false; |
|
2117 |
for (int i = 0; i < characterCount; i++) { |
|
2118 |
if (included[i] != inrun) { |
|
2119 |
inrun = !inrun; |
|
2120 |
if (inrun) { |
|
2121 |
count++; |
|
2122 |
} |
|
2123 |
} |
|
2124 |
} |
|
2125 |
||
2126 |
int[] ranges = new int[count * 2]; |
|
2127 |
count = 0; |
|
2128 |
inrun = false; |
|
2129 |
for (int i = 0; i < characterCount; i++) { |
|
2130 |
if (included[i] != inrun) { |
|
2131 |
ranges[count++] = i; |
|
2132 |
inrun = !inrun; |
|
2133 |
} |
|
2134 |
} |
|
2135 |
if (inrun) { |
|
2136 |
ranges[count++] = characterCount; |
|
2137 |
} |
|
2138 |
||
2139 |
return ranges; |
|
2140 |
} |
|
2141 |
||
2142 |
/** |
|
2143 |
* Returns a path enclosing the visual selection in the specified range, |
|
2144 |
* extended to <code>bounds</code>. |
|
2145 |
* <p> |
|
2146 |
* If the selection includes the leftmost (topmost) position, the selection |
|
2147 |
* is extended to the left (top) of <code>bounds</code>. If the |
|
2148 |
* selection includes the rightmost (bottommost) position, the selection |
|
2149 |
* is extended to the right (bottom) of the bounds. The height |
|
2150 |
* (width on vertical lines) of the selection is always extended to |
|
2151 |
* <code>bounds</code>. |
|
2152 |
* <p> |
|
2153 |
* Although the selection is always contiguous, the logically selected |
|
2154 |
* text can be discontiguous on lines with mixed-direction text. The |
|
2155 |
* logical ranges of text selected can be retrieved using |
|
2156 |
* <code>getLogicalRangesForVisualSelection</code>. For example, |
|
2157 |
* consider the text 'ABCdef' where capital letters indicate |
|
2158 |
* right-to-left text, rendered on a right-to-left line, with a visual |
|
2159 |
* selection from 0L (the leading edge of 'A') to 3T (the trailing edge |
|
2160 |
* of 'd'). The text appears as follows, with bold underlined areas |
|
2161 |
* representing the selection: |
|
2162 |
* <br><pre> |
|
2163 |
* d<u><b>efCBA </b></u> |
|
2164 |
* </pre> |
|
2165 |
* The logical selection ranges are 0-3, 4-6 (ABC, ef) because the |
|
2166 |
* visually contiguous text is logically discontiguous. Also note that |
|
2167 |
* since the rightmost position on the layout (to the right of 'A') is |
|
2168 |
* selected, the selection is extended to the right of the bounds. |
|
2169 |
* @param firstEndpoint one end of the visual selection |
|
2170 |
* @param secondEndpoint the other end of the visual selection |
|
2171 |
* @param bounds the bounding rectangle to which to extend the selection. |
|
2172 |
* This is in baseline-relative coordinates. |
|
2173 |
* @return a <code>Shape</code> enclosing the selection. This is in |
|
2174 |
* standard coordinates. |
|
2175 |
* @see #getLogicalRangesForVisualSelection(TextHitInfo, TextHitInfo) |
|
2176 |
* @see #getLogicalHighlightShape(int, int, Rectangle2D) |
|
2177 |
*/ |
|
2178 |
public Shape getVisualHighlightShape(TextHitInfo firstEndpoint, |
|
2179 |
TextHitInfo secondEndpoint, |
|
2180 |
Rectangle2D bounds) |
|
2181 |
{ |
|
2182 |
ensureCache(); |
|
2183 |
||
2184 |
checkTextHit(firstEndpoint); |
|
2185 |
checkTextHit(secondEndpoint); |
|
2186 |
||
2187 |
if(bounds == null) { |
|
2188 |
throw new IllegalArgumentException("Null Rectangle2D passed to TextLayout.getVisualHighlightShape()"); |
|
2189 |
} |
|
2190 |
||
2191 |
GeneralPath result = new GeneralPath(GeneralPath.WIND_EVEN_ODD); |
|
2192 |
||
2193 |
int firstCaret = hitToCaret(firstEndpoint); |
|
2194 |
int secondCaret = hitToCaret(secondEndpoint); |
|
2195 |
||
2196 |
result.append(caretBoundingShape(firstCaret, secondCaret, bounds), |
|
2197 |
false); |
|
2198 |
||
2199 |
if (firstCaret == 0 || secondCaret == 0) { |
|
2200 |
GeneralPath ls = leftShape(bounds); |
|
2201 |
if (!ls.getBounds().isEmpty()) |
|
2202 |
result.append(ls, false); |
|
2203 |
} |
|
2204 |
||
2205 |
if (firstCaret == characterCount || secondCaret == characterCount) { |
|
2206 |
GeneralPath rs = rightShape(bounds); |
|
2207 |
if (!rs.getBounds().isEmpty()) { |
|
2208 |
result.append(rs, false); |
|
2209 |
} |
|
2210 |
} |
|
2211 |
||
2212 |
LayoutPathImpl lp = textLine.getLayoutPath(); |
|
2213 |
if (lp != null) { |
|
2214 |
result = (GeneralPath)lp.mapShape(result); // dlf cast safe? |
|
2215 |
} |
|
2216 |
||
2217 |
return result; |
|
2218 |
} |
|
2219 |
||
2220 |
/** |
|
2221 |
* Returns a <code>Shape</code> enclosing the visual selection in the |
|
2222 |
* specified range, extended to the bounds. This method is a |
|
2223 |
* convenience overload of <code>getVisualHighlightShape</code> that |
|
2224 |
* uses the natural bounds of this <code>TextLayout</code>. |
|
2225 |
* @param firstEndpoint one end of the visual selection |
|
2226 |
* @param secondEndpoint the other end of the visual selection |
|
2227 |
* @return a <code>Shape</code> enclosing the selection. This is |
|
2228 |
* in standard coordinates. |
|
2229 |
*/ |
|
2230 |
public Shape getVisualHighlightShape(TextHitInfo firstEndpoint, |
|
2231 |
TextHitInfo secondEndpoint) { |
|
2232 |
return getVisualHighlightShape(firstEndpoint, secondEndpoint, getNaturalBounds()); |
|
2233 |
} |
|
2234 |
||
2235 |
/** |
|
2236 |
* Returns a <code>Shape</code> enclosing the logical selection in the |
|
2237 |
* specified range, extended to the specified <code>bounds</code>. |
|
2238 |
* <p> |
|
2239 |
* If the selection range includes the first logical character, the |
|
2240 |
* selection is extended to the portion of <code>bounds</code> before |
|
2241 |
* the start of this <code>TextLayout</code>. If the range includes |
|
2242 |
* the last logical character, the selection is extended to the portion |
|
2243 |
* of <code>bounds</code> after the end of this <code>TextLayout</code>. |
|
2244 |
* The height (width on vertical lines) of the selection is always |
|
2245 |
* extended to <code>bounds</code>. |
|
2246 |
* <p> |
|
2247 |
* The selection can be discontiguous on lines with mixed-direction text. |
|
2248 |
* Only those characters in the logical range between start and limit |
|
2249 |
* appear selected. For example, consider the text 'ABCdef' where capital |
|
2250 |
* letters indicate right-to-left text, rendered on a right-to-left line, |
|
2251 |
* with a logical selection from 0 to 4 ('ABCd'). The text appears as |
|
2252 |
* follows, with bold standing in for the selection, and underlining for |
|
2253 |
* the extension: |
|
2254 |
* <br><pre> |
|
2255 |
* <u><b>d</b></u>ef<u><b>CBA </b></u> |
|
2256 |
* </pre> |
|
2257 |
* The selection is discontiguous because the selected characters are |
|
2258 |
* visually discontiguous. Also note that since the range includes the |
|
2259 |
* first logical character (A), the selection is extended to the portion |
|
2260 |
* of the <code>bounds</code> before the start of the layout, which in |
|
2261 |
* this case (a right-to-left line) is the right portion of the |
|
2262 |
* <code>bounds</code>. |
|
2263 |
* @param firstEndpoint an endpoint in the range of characters to select |
|
2264 |
* @param secondEndpoint the other endpoint of the range of characters |
|
2265 |
* to select. Can be less than <code>firstEndpoint</code>. The range |
|
2266 |
* includes the character at min(firstEndpoint, secondEndpoint), but |
|
2267 |
* excludes max(firstEndpoint, secondEndpoint). |
|
2268 |
* @param bounds the bounding rectangle to which to extend the selection. |
|
2269 |
* This is in baseline-relative coordinates. |
|
2270 |
* @return an area enclosing the selection. This is in standard |
|
2271 |
* coordinates. |
|
2272 |
* @see #getVisualHighlightShape(TextHitInfo, TextHitInfo, Rectangle2D) |
|
2273 |
*/ |
|
2274 |
public Shape getLogicalHighlightShape(int firstEndpoint, |
|
2275 |
int secondEndpoint, |
|
2276 |
Rectangle2D bounds) { |
|
2277 |
if (bounds == null) { |
|
2278 |
throw new IllegalArgumentException("Null Rectangle2D passed to TextLayout.getLogicalHighlightShape()"); |
|
2279 |
} |
|
2280 |
||
2281 |
ensureCache(); |
|
2282 |
||
2283 |
if (firstEndpoint > secondEndpoint) { |
|
2284 |
int t = firstEndpoint; |
|
2285 |
firstEndpoint = secondEndpoint; |
|
2286 |
secondEndpoint = t; |
|
2287 |
} |
|
2288 |
||
2289 |
if(firstEndpoint < 0 || secondEndpoint > characterCount) { |
|
2290 |
throw new IllegalArgumentException("Range is invalid in TextLayout.getLogicalHighlightShape()"); |
|
2291 |
} |
|
2292 |
||
2293 |
GeneralPath result = new GeneralPath(GeneralPath.WIND_EVEN_ODD); |
|
2294 |
||
2295 |
int[] carets = new int[10]; // would this ever not handle all cases? |
|
2296 |
int count = 0; |
|
2297 |
||
2298 |
if (firstEndpoint < secondEndpoint) { |
|
2299 |
int logIndex = firstEndpoint; |
|
2300 |
do { |
|
2301 |
carets[count++] = hitToCaret(TextHitInfo.leading(logIndex)); |
|
2302 |
boolean ltr = textLine.isCharLTR(logIndex); |
|
2303 |
||
2304 |
do { |
|
2305 |
logIndex++; |
|
2306 |
} while (logIndex < secondEndpoint && textLine.isCharLTR(logIndex) == ltr); |
|
2307 |
||
2308 |
int hitCh = logIndex; |
|
2309 |
carets[count++] = hitToCaret(TextHitInfo.trailing(hitCh - 1)); |
|
2310 |
||
2311 |
if (count == carets.length) { |
|
2312 |
int[] temp = new int[carets.length + 10]; |
|
2313 |
System.arraycopy(carets, 0, temp, 0, count); |
|
2314 |
carets = temp; |
|
2315 |
} |
|
2316 |
} while (logIndex < secondEndpoint); |
|
2317 |
} |
|
2318 |
else { |
|
2319 |
count = 2; |
|
2320 |
carets[0] = carets[1] = hitToCaret(TextHitInfo.leading(firstEndpoint)); |
|
2321 |
} |
|
2322 |
||
2323 |
// now create paths for pairs of carets |
|
2324 |
||
2325 |
for (int i = 0; i < count; i += 2) { |
|
2326 |
result.append(caretBoundingShape(carets[i], carets[i+1], bounds), |
|
2327 |
false); |
|
2328 |
} |
|
2329 |
||
2330 |
if (firstEndpoint != secondEndpoint) { |
|
2331 |
if ((textLine.isDirectionLTR() && firstEndpoint == 0) || (!textLine.isDirectionLTR() && |
|
2332 |
secondEndpoint == characterCount)) { |
|
2333 |
GeneralPath ls = leftShape(bounds); |
|
2334 |
if (!ls.getBounds().isEmpty()) { |
|
2335 |
result.append(ls, false); |
|
2336 |
} |
|
2337 |
} |
|
2338 |
||
2339 |
if ((textLine.isDirectionLTR() && secondEndpoint == characterCount) || |
|
2340 |
(!textLine.isDirectionLTR() && firstEndpoint == 0)) { |
|
2341 |
||
2342 |
GeneralPath rs = rightShape(bounds); |
|
2343 |
if (!rs.getBounds().isEmpty()) { |
|
2344 |
result.append(rs, false); |
|
2345 |
} |
|
2346 |
} |
|
2347 |
} |
|
2348 |
||
2349 |
LayoutPathImpl lp = textLine.getLayoutPath(); |
|
2350 |
if (lp != null) { |
|
2351 |
result = (GeneralPath)lp.mapShape(result); // dlf cast safe? |
|
2352 |
} |
|
2353 |
return result; |
|
2354 |
} |
|
2355 |
||
2356 |
/** |
|
2357 |
* Returns a <code>Shape</code> enclosing the logical selection in the |
|
2358 |
* specified range, extended to the natural bounds of this |
|
2359 |
* <code>TextLayout</code>. This method is a convenience overload of |
|
2360 |
* <code>getLogicalHighlightShape</code> that uses the natural bounds of |
|
2361 |
* this <code>TextLayout</code>. |
|
2362 |
* @param firstEndpoint an endpoint in the range of characters to select |
|
2363 |
* @param secondEndpoint the other endpoint of the range of characters |
|
2364 |
* to select. Can be less than <code>firstEndpoint</code>. The range |
|
2365 |
* includes the character at min(firstEndpoint, secondEndpoint), but |
|
2366 |
* excludes max(firstEndpoint, secondEndpoint). |
|
2367 |
* @return a <code>Shape</code> enclosing the selection. This is in |
|
2368 |
* standard coordinates. |
|
2369 |
*/ |
|
2370 |
public Shape getLogicalHighlightShape(int firstEndpoint, int secondEndpoint) { |
|
2371 |
||
2372 |
return getLogicalHighlightShape(firstEndpoint, secondEndpoint, getNaturalBounds()); |
|
2373 |
} |
|
2374 |
||
2375 |
/** |
|
2376 |
* Returns the black box bounds of the characters in the specified range. |
|
2377 |
* The black box bounds is an area consisting of the union of the bounding |
|
2378 |
* boxes of all the glyphs corresponding to the characters between start |
|
2379 |
* and limit. This area can be disjoint. |
|
2380 |
* @param firstEndpoint one end of the character range |
|
2381 |
* @param secondEndpoint the other end of the character range. Can be |
|
2382 |
* less than <code>firstEndpoint</code>. |
|
2383 |
* @return a <code>Shape</code> enclosing the black box bounds. This is |
|
2384 |
* in standard coordinates. |
|
2385 |
*/ |
|
2386 |
public Shape getBlackBoxBounds(int firstEndpoint, int secondEndpoint) { |
|
2387 |
ensureCache(); |
|
2388 |
||
2389 |
if (firstEndpoint > secondEndpoint) { |
|
2390 |
int t = firstEndpoint; |
|
2391 |
firstEndpoint = secondEndpoint; |
|
2392 |
secondEndpoint = t; |
|
2393 |
} |
|
2394 |
||
2395 |
if (firstEndpoint < 0 || secondEndpoint > characterCount) { |
|
2396 |
throw new IllegalArgumentException("Invalid range passed to TextLayout.getBlackBoxBounds()"); |
|
2397 |
} |
|
2398 |
||
2399 |
/* |
|
2400 |
* return an area that consists of the bounding boxes of all the |
|
2401 |
* characters from firstEndpoint to limit |
|
2402 |
*/ |
|
2403 |
||
2404 |
GeneralPath result = new GeneralPath(GeneralPath.WIND_NON_ZERO); |
|
2405 |
||
2406 |
if (firstEndpoint < characterCount) { |
|
2407 |
for (int logIndex = firstEndpoint; |
|
2408 |
logIndex < secondEndpoint; |
|
2409 |
logIndex++) { |
|
2410 |
||
2411 |
Rectangle2D r = textLine.getCharBounds(logIndex); |
|
2412 |
if (!r.isEmpty()) { |
|
2413 |
result.append(r, false); |
|
2414 |
} |
|
2415 |
} |
|
2416 |
} |
|
2417 |
||
2418 |
if (dx != 0 || dy != 0) { |
|
2419 |
AffineTransform tx = AffineTransform.getTranslateInstance(dx, dy); |
|
2420 |
result = (GeneralPath)tx.createTransformedShape(result); |
|
2421 |
} |
|
2422 |
LayoutPathImpl lp = textLine.getLayoutPath(); |
|
2423 |
if (lp != null) { |
|
2424 |
result = (GeneralPath)lp.mapShape(result); |
|
2425 |
} |
|
2426 |
||
2427 |
//return new Highlight(result, false); |
|
2428 |
return result; |
|
2429 |
} |
|
2430 |
||
2431 |
/** |
|
2432 |
* Returns the distance from the point (x, y) to the caret along |
|
2433 |
* the line direction defined in <code>caretInfo</code>. Distance is |
|
2434 |
* negative if the point is to the left of the caret on a horizontal |
|
2435 |
* line, or above the caret on a vertical line. |
|
2436 |
* Utility for use by hitTestChar. |
|
2437 |
*/ |
|
2438 |
private float caretToPointDistance(float[] caretInfo, float x, float y) { |
|
2439 |
// distanceOffBaseline is negative if you're 'above' baseline |
|
2440 |
||
2441 |
float lineDistance = isVerticalLine? y : x; |
|
2442 |
float distanceOffBaseline = isVerticalLine? -x : y; |
|
2443 |
||
2444 |
return lineDistance - caretInfo[0] + |
|
2445 |
(distanceOffBaseline*caretInfo[1]); |
|
2446 |
} |
|
2447 |
||
2448 |
/** |
|
2449 |
* Returns a <code>TextHitInfo</code> corresponding to the |
|
2450 |
* specified point. |
|
2451 |
* Coordinates outside the bounds of the <code>TextLayout</code> |
|
2452 |
* map to hits on the leading edge of the first logical character, |
|
2453 |
* or the trailing edge of the last logical character, as appropriate, |
|
2454 |
* regardless of the position of that character in the line. Only the |
|
2455 |
* direction along the baseline is used to make this evaluation. |
|
2456 |
* @param x the x offset from the origin of this |
|
2457 |
* <code>TextLayout</code>. This is in standard coordinates. |
|
2458 |
* @param y the y offset from the origin of this |
|
2459 |
* <code>TextLayout</code>. This is in standard coordinates. |
|
2460 |
* @param bounds the bounds of the <code>TextLayout</code>. This |
|
2461 |
* is in baseline-relative coordinates. |
|
2462 |
* @return a hit describing the character and edge (leading or trailing) |
|
2463 |
* under the specified point. |
|
2464 |
*/ |
|
2465 |
public TextHitInfo hitTestChar(float x, float y, Rectangle2D bounds) { |
|
2466 |
// check boundary conditions |
|
2467 |
||
2468 |
LayoutPathImpl lp = textLine.getLayoutPath(); |
|
2469 |
boolean prev = false; |
|
2470 |
if (lp != null) { |
|
2471 |
Point2D.Float pt = new Point2D.Float(x, y); |
|
2472 |
prev = lp.pointToPath(pt, pt); |
|
2473 |
x = pt.x; |
|
2474 |
y = pt.y; |
|
2475 |
} |
|
2476 |
||
2477 |
if (isVertical()) { |
|
2478 |
if (y < bounds.getMinY()) { |
|
2479 |
return TextHitInfo.leading(0); |
|
2480 |
} else if (y >= bounds.getMaxY()) { |
|
2481 |
return TextHitInfo.trailing(characterCount-1); |
|
2482 |
} |
|
2483 |
} else { |
|
2484 |
if (x < bounds.getMinX()) { |
|
2485 |
return isLeftToRight() ? TextHitInfo.leading(0) : TextHitInfo.trailing(characterCount-1); |
|
2486 |
} else if (x >= bounds.getMaxX()) { |
|
2487 |
return isLeftToRight() ? TextHitInfo.trailing(characterCount-1) : TextHitInfo.leading(0); |
|
2488 |
} |
|
2489 |
} |
|
2490 |
||
2491 |
// revised hit test |
|
2492 |
// the original seems too complex and fails miserably with italic offsets |
|
2493 |
// the natural tendency is to move towards the character you want to hit |
|
2494 |
// so we'll just measure distance to the center of each character's visual |
|
2495 |
// bounds, pick the closest one, then see which side of the character's |
|
2496 |
// center line (italic) the point is on. |
|
2497 |
// this tends to make it easier to hit narrow characters, which can be a |
|
2498 |
// bit odd if you're visually over an adjacent wide character. this makes |
|
2499 |
// a difference with bidi, so perhaps i need to revisit this yet again. |
|
2500 |
||
2501 |
double distance = Double.MAX_VALUE; |
|
2502 |
int index = 0; |
|
2503 |
int trail = -1; |
|
2504 |
CoreMetrics lcm = null; |
|
2505 |
float icx = 0, icy = 0, ia = 0, cy = 0, dya = 0, ydsq = 0; |
|
2506 |
||
2507 |
for (int i = 0; i < characterCount; ++i) { |
|
2508 |
if (!textLine.caretAtOffsetIsValid(i)) { |
|
2509 |
continue; |
|
2510 |
} |
|
2511 |
if (trail == -1) { |
|
2512 |
trail = i; |
|
2513 |
} |
|
2514 |
CoreMetrics cm = textLine.getCoreMetricsAt(i); |
|
2515 |
if (cm != lcm) { |
|
2516 |
lcm = cm; |
|
2517 |
// just work around baseline mess for now |
|
2518 |
if (cm.baselineIndex == GraphicAttribute.TOP_ALIGNMENT) { |
|
2519 |
cy = -(textLine.getMetrics().ascent - cm.ascent) + cm.ssOffset; |
|
2520 |
} else if (cm.baselineIndex == GraphicAttribute.BOTTOM_ALIGNMENT) { |
|
2521 |
cy = textLine.getMetrics().descent - cm.descent + cm.ssOffset; |
|
2522 |
} else { |
|
2523 |
cy = cm.effectiveBaselineOffset(baselineOffsets) + cm.ssOffset; |
|
2524 |
} |
|
2525 |
float dy = (cm.descent - cm.ascent) / 2 - cy; |
|
2526 |
dya = dy * cm.italicAngle; |
|
2527 |
cy += dy; |
|
2528 |
ydsq = (cy - y)*(cy - y); |
|
2529 |
} |
|
2530 |
float cx = textLine.getCharXPosition(i); |
|
2531 |
float ca = textLine.getCharAdvance(i); |
|
2532 |
float dx = ca / 2; |
|
2533 |
cx += dx - dya; |
|
2534 |
||
2535 |
// proximity in x (along baseline) is two times as important as proximity in y |
|
2536 |
double nd = Math.sqrt(4*(cx - x)*(cx - x) + ydsq); |
|
2537 |
if (nd < distance) { |
|
2538 |
distance = nd; |
|
2539 |
index = i; |
|
2540 |
trail = -1; |
|
2541 |
icx = cx; icy = cy; ia = cm.italicAngle; |
|
2542 |
} |
|
2543 |
} |
|
2544 |
boolean left = x < icx - (y - icy) * ia; |
|
2545 |
boolean leading = textLine.isCharLTR(index) == left; |
|
2546 |
if (trail == -1) { |
|
2547 |
trail = characterCount; |
|
2548 |
} |
|
2549 |
TextHitInfo result = leading ? TextHitInfo.leading(index) : |
|
2550 |
TextHitInfo.trailing(trail-1); |
|
2551 |
return result; |
|
2552 |
} |
|
2553 |
||
2554 |
/** |
|
2555 |
* Returns a <code>TextHitInfo</code> corresponding to the |
|
2556 |
* specified point. This method is a convenience overload of |
|
2557 |
* <code>hitTestChar</code> that uses the natural bounds of this |
|
2558 |
* <code>TextLayout</code>. |
|
2559 |
* @param x the x offset from the origin of this |
|
2560 |
* <code>TextLayout</code>. This is in standard coordinates. |
|
2561 |
* @param y the y offset from the origin of this |
|
2562 |
* <code>TextLayout</code>. This is in standard coordinates. |
|
2563 |
* @return a hit describing the character and edge (leading or trailing) |
|
2564 |
* under the specified point. |
|
2565 |
*/ |
|
2566 |
public TextHitInfo hitTestChar(float x, float y) { |
|
2567 |
||
2568 |
return hitTestChar(x, y, getNaturalBounds()); |
|
2569 |
} |
|
2570 |
||
2571 |
/** |
|
2572 |
* Returns the hash code of this <code>TextLayout</code>. |
|
2573 |
* @return the hash code of this <code>TextLayout</code>. |
|
2574 |
*/ |
|
2575 |
public int hashCode() { |
|
2576 |
if (hashCodeCache == 0) { |
|
2577 |
ensureCache(); |
|
2578 |
hashCodeCache = textLine.hashCode(); |
|
2579 |
} |
|
2580 |
return hashCodeCache; |
|
2581 |
} |
|
2582 |
||
2583 |
/** |
|
2584 |
* Returns <code>true</code> if the specified <code>Object</code> is a |
|
2585 |
* <code>TextLayout</code> object and if the specified <code>Object</code> |
|
2586 |
* equals this <code>TextLayout</code>. |
|
2587 |
* @param obj an <code>Object</code> to test for equality |
|
2588 |
* @return <code>true</code> if the specified <code>Object</code> |
|
2589 |
* equals this <code>TextLayout</code>; <code>false</code> |
|
2590 |
* otherwise. |
|
2591 |
*/ |
|
2592 |
public boolean equals(Object obj) { |
|
2593 |
return (obj instanceof TextLayout) && equals((TextLayout)obj); |
|
2594 |
} |
|
2595 |
||
2596 |
/** |
|
2597 |
* Returns <code>true</code> if the two layouts are equal. |
|
2598 |
* Two layouts are equal if they contain equal glyphvectors in the same order. |
|
2599 |
* @param rhs the <code>TextLayout</code> to compare to this |
|
2600 |
* <code>TextLayout</code> |
|
2601 |
* @return <code>true</code> if the specified <code>TextLayout</code> |
|
2602 |
* equals this <code>TextLayout</code>. |
|
2603 |
* |
|
2604 |
*/ |
|
2605 |
public boolean equals(TextLayout rhs) { |
|
2606 |
||
2607 |
if (rhs == null) { |
|
2608 |
return false; |
|
2609 |
} |
|
2610 |
if (rhs == this) { |
|
2611 |
return true; |
|
2612 |
} |
|
2613 |
||
2614 |
ensureCache(); |
|
2615 |
return textLine.equals(rhs.textLine); |
|
2616 |
} |
|
2617 |
||
2618 |
/** |
|
2619 |
* Returns debugging information for this <code>TextLayout</code>. |
|
2620 |
* @return the <code>textLine</code> of this <code>TextLayout</code> |
|
2621 |
* as a <code>String</code>. |
|
2622 |
*/ |
|
2623 |
public String toString() { |
|
2624 |
ensureCache(); |
|
2625 |
return textLine.toString(); |
|
2626 |
} |
|
2627 |
||
2628 |
/** |
|
2629 |
* Renders this <code>TextLayout</code> at the specified location in |
|
2630 |
* the specified {@link java.awt.Graphics2D Graphics2D} context. |
|
2631 |
* The origin of the layout is placed at x, y. Rendering may touch |
|
2632 |
* any point within <code>getBounds()</code> of this position. This |
|
2633 |
* leaves the <code>g2</code> unchanged. Text is rendered along the |
|
2634 |
* baseline path. |
|
2635 |
* @param g2 the <code>Graphics2D</code> context into which to render |
|
2636 |
* the layout |
|
2637 |
* @param x the X coordinate of the origin of this <code>TextLayout</code> |
|
2638 |
* @param y the Y coordinate of the origin of this <code>TextLayout</code> |
|
2639 |
* @see #getBounds() |
|
2640 |
*/ |
|
2641 |
public void draw(Graphics2D g2, float x, float y) { |
|
2642 |
||
2643 |
if (g2 == null) { |
|
2644 |
throw new IllegalArgumentException("Null Graphics2D passed to TextLayout.draw()"); |
|
2645 |
} |
|
2646 |
||
2647 |
textLine.draw(g2, x - dx, y - dy); |
|
2648 |
} |
|
2649 |
||
2650 |
/** |
|
2651 |
* Package-only method for testing ONLY. Please don't abuse. |
|
2652 |
*/ |
|
2653 |
TextLine getTextLineForTesting() { |
|
2654 |
||
2655 |
return textLine; |
|
2656 |
} |
|
2657 |
||
2658 |
/** |
|
2659 |
* |
|
2660 |
* Return the index of the first character with a different baseline from the |
|
2661 |
* character at start, or limit if all characters between start and limit have |
|
2662 |
* the same baseline. |
|
2663 |
*/ |
|
2664 |
private static int sameBaselineUpTo(Font font, char[] text, |
|
2665 |
int start, int limit) { |
|
2666 |
// current implementation doesn't support multiple baselines |
|
2667 |
return limit; |
|
2668 |
/* |
|
2669 |
byte bl = font.getBaselineFor(text[start++]); |
|
2670 |
while (start < limit && font.getBaselineFor(text[start]) == bl) { |
|
2671 |
++start; |
|
2672 |
} |
|
2673 |
return start; |
|
2674 |
*/ |
|
2675 |
} |
|
2676 |
||
2677 |
static byte getBaselineFromGraphic(GraphicAttribute graphic) { |
|
2678 |
||
2679 |
byte alignment = (byte) graphic.getAlignment(); |
|
2680 |
||
2681 |
if (alignment == GraphicAttribute.BOTTOM_ALIGNMENT || |
|
2682 |
alignment == GraphicAttribute.TOP_ALIGNMENT) { |
|
2683 |
||
2684 |
return (byte)GraphicAttribute.ROMAN_BASELINE; |
|
2685 |
} |
|
2686 |
else { |
|
2687 |
return alignment; |
|
2688 |
} |
|
2689 |
} |
|
2690 |
||
2691 |
/** |
|
2692 |
* Returns a <code>Shape</code> representing the outline of this |
|
2693 |
* <code>TextLayout</code>. |
|
2694 |
* @param tx an optional {@link AffineTransform} to apply to the |
|
2695 |
* outline of this <code>TextLayout</code>. |
|
2696 |
* @return a <code>Shape</code> that is the outline of this |
|
2697 |
* <code>TextLayout</code>. This is in standard coordinates. |
|
2698 |
*/ |
|
2699 |
public Shape getOutline(AffineTransform tx) { |
|
2700 |
ensureCache(); |
|
2701 |
Shape result = textLine.getOutline(tx); |
|
2702 |
LayoutPathImpl lp = textLine.getLayoutPath(); |
|
2703 |
if (lp != null) { |
|
2704 |
result = lp.mapShape(result); |
|
2705 |
} |
|
2706 |
return result; |
|
2707 |
} |
|
2708 |
||
2709 |
/** |
|
2710 |
* Return the LayoutPath, or null if the layout path is the |
|
2711 |
* default path (x maps to advance, y maps to offset). |
|
2712 |
* @return the layout path |
|
2713 |
* @since 1.6 |
|
2714 |
*/ |
|
2715 |
public LayoutPath getLayoutPath() { |
|
2716 |
return textLine.getLayoutPath(); |
|
2717 |
} |
|
2718 |
||
2719 |
/** |
|
2720 |
* Convert a hit to a point in standard coordinates. The point is |
|
2721 |
* on the baseline of the character at the leading or trailing |
|
2722 |
* edge of the character, as appropriate. If the path is |
|
2723 |
* broken at the side of the character represented by the hit, the |
|
2724 |
* point will be adjacent to the character. |
|
2725 |
* @param hit the hit to check. This must be a valid hit on |
|
2726 |
* the TextLayout. |
|
2727 |
* @param point the returned point. The point is in standard |
|
2728 |
* coordinates. |
|
2729 |
* @throws IllegalArgumentException if the hit is not valid for the |
|
2730 |
* TextLayout. |
|
2731 |
* @throws NullPointerException if hit or point is null. |
|
2732 |
* @since 1.6 |
|
2733 |
*/ |
|
2734 |
public void hitToPoint(TextHitInfo hit, Point2D point) { |
|
2735 |
if (hit == null || point == null) { |
|
2736 |
throw new NullPointerException((hit == null ? "hit" : "point") + |
|
2737 |
" can't be null"); |
|
2738 |
} |
|
2739 |
ensureCache(); |
|
2740 |
checkTextHit(hit); |
|
2741 |
||
2742 |
float adv = 0; |
|
2743 |
float off = 0; |
|
2744 |
||
2745 |
int ix = hit.getCharIndex(); |
|
2746 |
boolean leading = hit.isLeadingEdge(); |
|
2747 |
boolean ltr; |
|
2748 |
if (ix == -1 || ix == textLine.characterCount()) { |
|
2749 |
ltr = textLine.isDirectionLTR(); |
|
2750 |
adv = (ltr == (ix == -1)) ? 0 : lineMetrics.advance; |
|
2751 |
} else { |
|
2752 |
ltr = textLine.isCharLTR(ix); |
|
2753 |
adv = textLine.getCharLinePosition(ix, leading); |
|
2754 |
off = textLine.getCharYPosition(ix); |
|
2755 |
} |
|
2756 |
point.setLocation(adv, off); |
|
2757 |
LayoutPath lp = textLine.getLayoutPath(); |
|
2758 |
if (lp != null) { |
|
2759 |
lp.pathToPoint(point, ltr != leading, point); |
|
2760 |
} |
|
2761 |
} |
|
2762 |
} |