/* * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ /* * (C) Copyright IBM Corp. 1999,  All rights reserved. */package java.awt.font; import java.awt.Font;import java.awt.Toolkit;import java.awt.im.InputMethodHighlight;import java.text.Annotation;import java.text.AttributedCharacterIterator;import java.util.Vector;import java.util.HashMap;import java.util.Map;import sun.font.Decoration;import sun.font.FontResolver;import sun.text.CodePointIterator; /** * This class stores Font, GraphicAttribute, and Decoration intervals * on a paragraph of styled text. * <p> * Currently, this class is optimized for a small number of intervals * (preferrably 1). */final class StyledParagraph {     // the length of the paragraph    private int length;     // If there is a single Decoration for the whole paragraph, it    // is stored here.  Otherwise this field is ignored.     private Decoration decoration;     // If there is a single Font or GraphicAttribute for the whole    // paragraph, it is stored here.  Otherwise this field is ignored.    private Object font;     // If there are multiple Decorations in the paragraph, they are    // stored in this Vector, in order.  Otherwise this vector and    // the decorationStarts array are null.    private Vector decorations;    // If there are multiple Decorations in the paragraph,    // decorationStarts[i] contains the index where decoration i    // starts.  For convenience, there is an extra entry at the    // end of this array with the length of the paragraph.    int[] decorationStarts;     // If there are multiple Fonts/GraphicAttributes in the paragraph,    // they are    // stored in this Vector, in order.  Otherwise this vector and    // the fontStarts array are null.    private Vector fonts;    // If there are multiple Fonts/GraphicAttributes in the paragraph,    // fontStarts[i] contains the index where decoration i    // starts.  For convenience, there is an extra entry at the    // end of this array with the length of the paragraph.    int[] fontStarts;     private static int INITIAL_SIZE = 8;     /**     * Create a new StyledParagraph over the given styled text.     * @param aci an iterator over the text     * @param chars the characters extracted from aci     */    public StyledParagraph(AttributedCharacterIterator aci,                           char[] chars) {         int start = aci.getBeginIndex();        int end = aci.getEndIndex();        length = end - start;         int index = start;        aci.first();         do {            final int nextRunStart = aci.getRunLimit();            final int localIndex = index-start;             Map attributes = aci.getAttributes();            attributes = addInputMethodAttrs(attributes);            Decoration d = Decoration.getDecoration(attributes);            addDecoration(d, localIndex);             Object f = getGraphicOrFont(attributes);            if (f == null) {                addFonts(chars, attributes, localIndex, nextRunStart-start);            }            else {                addFont(f, localIndex);            }             aci.setIndex(nextRunStart);            index = nextRunStart;         } while (index < end);         // Add extra entries to starts arrays with the length        // of the paragraph.  'this' is used as a dummy value        // in the Vector.        if (decorations != null) {            decorationStarts = addToVector(this, length, decorations, decorationStarts);        }        if (fonts != null) {            fontStarts = addToVector(this, length, fonts, fontStarts);        }    }     /**     * Adjust indices in starts to reflect an insertion after pos.     * Any index in starts greater than pos will be increased by 1.     */    private static void insertInto(int pos, int[] starts, int numStarts) {         while (starts[--numStarts] > pos) {            starts[numStarts] += 1;        }    }     /**     * Return a StyledParagraph reflecting the insertion of a single character     * into the text.  This method will attempt to reuse the given paragraph,     * but may create a new paragraph.     * @param aci an iterator over the text.  The text should be the same as the     *     text used to create (or most recently update) oldParagraph, with     *     the exception of inserting a single character at insertPos.     * @param chars the characters in aci     * @param insertPos the index of the new character in aci     * @param oldParagraph a StyledParagraph for the text in aci before the     *     insertion     */    public static StyledParagraph insertChar(AttributedCharacterIterator aci,                                             char[] chars,                                             int insertPos,                                             StyledParagraph oldParagraph) {         // If the styles at insertPos match those at insertPos-1,        // oldParagraph will be reused.  Otherwise we create a new        // paragraph.         char ch = aci.setIndex(insertPos);        int relativePos = Math.max(insertPos - aci.getBeginIndex() - 1, 0);         Map attributes = addInputMethodAttrs(aci.getAttributes());        Decoration d = Decoration.getDecoration(attributes);        if (!oldParagraph.getDecorationAt(relativePos).equals(d)) {            return new StyledParagraph(aci, chars);        }        Object f = getGraphicOrFont(attributes);        if (f == null) {            FontResolver resolver = FontResolver.getInstance();            int fontIndex = resolver.getFontIndex(ch);            f = resolver.getFont(fontIndex, attributes);        }        if (!oldParagraph.getFontOrGraphicAt(relativePos).equals(f)) {            return new StyledParagraph(aci, chars);        }         // insert into existing paragraph        oldParagraph.length += 1;        if (oldParagraph.decorations != null) {            insertInto(relativePos,                       oldParagraph.decorationStarts,                       oldParagraph.decorations.size());        }        if (oldParagraph.fonts != null) {            insertInto(relativePos,                       oldParagraph.fontStarts,                       oldParagraph.fonts.size());        }        return oldParagraph;    }     /**     * Adjust indices in starts to reflect a deletion after deleteAt.     * Any index in starts greater than deleteAt will be increased by 1.     * It is the caller's responsibility to make sure that no 0-length     * runs result.     */    private static void deleteFrom(int deleteAt, int[] starts, int numStarts) {         while (starts[--numStarts] > deleteAt) {            starts[numStarts] -= 1;        }    }     /**     * Return a StyledParagraph reflecting the insertion of a single character     * into the text.  This method will attempt to reuse the given paragraph,     * but may create a new paragraph.     * @param aci an iterator over the text.  The text should be the same as the     *     text used to create (or most recently update) oldParagraph, with     *     the exception of deleting a single character at deletePos.     * @param chars the characters in aci     * @param deletePos the index where a character was removed     * @param oldParagraph a StyledParagraph for the text in aci before the     *     insertion     */    public static StyledParagraph deleteChar(AttributedCharacterIterator aci,                                             char[] chars,                                             int deletePos,                                             StyledParagraph oldParagraph) {         // We will reuse oldParagraph unless there was a length-1 run        // at deletePos.  We could do more work and check the individual        // Font and Decoration runs, but we don't right now...        deletePos -= aci.getBeginIndex();         if (oldParagraph.decorations == null && oldParagraph.fonts == null) {            oldParagraph.length -= 1;            return oldParagraph;        }         if (oldParagraph.getRunLimit(deletePos) == deletePos+1) {            if (deletePos == 0 || oldParagraph.getRunLimit(deletePos-1) == deletePos) {                return new StyledParagraph(aci, chars);            }        }         oldParagraph.length -= 1;        if (oldParagraph.decorations != null) {            deleteFrom(deletePos,                       oldParagraph.decorationStarts,                       oldParagraph.decorations.size());        }        if (oldParagraph.fonts != null) {            deleteFrom(deletePos,                       oldParagraph.fontStarts,                       oldParagraph.fonts.size());        }        return oldParagraph;    }     /**     * Return the index at which there is a different Font, GraphicAttribute, or     * Dcoration than at the given index.     * @param index a valid index in the paragraph     * @return the first index where there is a change in attributes from     *      those at index     */    public int getRunLimit(int index) {         if (index < 0 || index >= length) {            throw new IllegalArgumentException("index out of range");        }        int limit1 = length;        if (decorations != null) {            int run = findRunContaining(index, decorationStarts);            limit1 = decorationStarts[run+1];        }        int limit2 = length;        if (fonts != null) {            int run = findRunContaining(index, fontStarts);            limit2 = fontStarts[run+1];        }        return Math.min(limit1, limit2);    }     /**     * Return the Decoration in effect at the given index.     * @param index a valid index in the paragraph     * @return the Decoration at index.     */    public Decoration getDecorationAt(int index) {         if (index < 0 || index >= length) {            throw new IllegalArgumentException("index out of range");        }        if (decorations == null) {            return decoration;        }        int run = findRunContaining(index, decorationStarts);        return (Decoration) decorations.elementAt(run);    }     /**     * Return the Font or GraphicAttribute in effect at the given index.     * The client must test the type of the return value to determine what     * it is.     * @param index a valid index in the paragraph     * @return the Font or GraphicAttribute at index.     */    public Object getFontOrGraphicAt(int index) {         if (index < 0 || index >= length) {            throw new IllegalArgumentException("index out of range");        }        if (fonts == null) {            return font;        }        int run = findRunContaining(index, fontStarts);        return fonts.elementAt(run);    }     /**     * Return i such that starts[i] <= index < starts[i+1].  starts     * must be in increasing order, with at least one element greater     * than index.     */    private static int findRunContaining(int index, int[] starts) {         for (int i=1; true; i++) {            if (starts[i] > index) {                return i-1;            }        }    }     /**     * Append the given Object to the given Vector.  Add     * the given index to the given starts array.  If the     * starts array does not have room for the index, a     * new array is created and returned.     */    private static int[] addToVector(Object obj,                                     int index,                                     Vector v,                                     int[] starts) {         if (!v.lastElement().equals(obj)) {            v.addElement(obj);            int count = v.size();            if (starts.length == count) {                int[] temp = new int[starts.length*2];                System.arraycopy(starts, 0, temp, 0, starts.length);                starts = temp;            }            starts[count-1] = index;        }        return starts;    }     /**     * Add a new Decoration run with the given Decoration at the     * given index.     */    private void addDecoration(Decoration d, int index) {         if (decorations != null) {            decorationStarts = addToVector(d,                                           index,                                           decorations,                                           decorationStarts);        }        else if (decoration == null) {            decoration = d;        }        else {            if (!decoration.equals(d)) {                decorations = new Vector(INITIAL_SIZE);                decorations.addElement(decoration);                decorations.addElement(d);                decorationStarts = new int[INITIAL_SIZE];                decorationStarts[0] = 0;                decorationStarts[1] = index;            }        }    }     /**     * Add a new Font/GraphicAttribute run with the given object at the     * given index.     */    private void addFont(Object f, int index) {         if (fonts != null) {            fontStarts = addToVector(f, index, fonts, fontStarts);        }        else if (font == null) {            font = f;        }        else {            if (!font.equals(f)) {                fonts = new Vector(INITIAL_SIZE);                fonts.addElement(font);                fonts.addElement(f);                fontStarts = new int[INITIAL_SIZE];                fontStarts[0] = 0;                fontStarts[1] = index;            }        }    }     /**     * Resolve the given chars into Fonts using FontResolver, then add     * font runs for each.     */    private void addFonts(char[] chars, Map attributes, int start, int limit) {         FontResolver resolver = FontResolver.getInstance();        CodePointIterator iter = CodePointIterator.create(chars, start, limit);        for (int runStart = iter.charIndex(); runStart < limit; runStart = iter.charIndex()) {            int fontIndex = resolver.nextFontRunIndex(iter);            addFont(resolver.getFont(fontIndex, attributes), runStart);        }    }     /**     * Return a Map with entries from oldStyles, as well as input     * method entries, if any.     */    static Map addInputMethodAttrs(Map oldStyles) {         Object value = oldStyles.get(TextAttribute.INPUT_METHOD_HIGHLIGHT);         try {            if (value != null) {                if (value instanceof Annotation) {                    value = ((Annotation)value).getValue();                }                 InputMethodHighlight hl;                hl = (InputMethodHighlight) value;                 Map imStyles = null;                try {                    imStyles = hl.getStyle();                } catch (NoSuchMethodError e) {                }                 if (imStyles == null) {                    Toolkit tk = Toolkit.getDefaultToolkit();                    imStyles = tk.mapInputMethodHighlight(hl);                }                 if (imStyles != null) {                    HashMap newStyles = new HashMap(5, (float)0.9);                    newStyles.putAll(oldStyles);                     newStyles.putAll(imStyles);                     return newStyles;                }            }        }        catch(ClassCastException e) {        }         return oldStyles;    }     /**     * Extract a GraphicAttribute or Font from the given attributes.     * If attributes does not contain a GraphicAttribute, Font, or     * Font family entry this method returns null.     */    private static Object getGraphicOrFont(Map attributes) {         Object value = attributes.get(TextAttribute.CHAR_REPLACEMENT);        if (value != null) {            return value;        }        value = attributes.get(TextAttribute.FONT);        if (value != null) {            return value;        }         if (attributes.get(TextAttribute.FAMILY) != null) {            return Font.getFont(attributes);        }        else {            return null;        }    }}