| /* |
| * 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; |
| } |
| } |
| } |