attributedstring.java

java源代码 请看看啊 提点宝贵的意见

            updateRunInfo();
            if (attributes != null) {
                relevantAttributes = (Attribute[]) attributes.clone();
            }
        }
        
        // Object methods. See documentation in that class.
        
        public boolean equals(Object obj) {
            if (this == obj) {
                return true;
            }
            if (!(obj instanceof AttributedStringIterator)) {
                return false;
            }

            AttributedStringIterator that = (AttributedStringIterator) obj;

            if (AttributedString.this != that.getString())
                return false;
            if (currentIndex != that.currentIndex || beginIndex != that.beginIndex || endIndex != that.endIndex)
                return false;
            return true;
        }

        public int hashCode() {
            return text.hashCode() ^ currentIndex ^ beginIndex ^ endIndex;
        }

        public Object clone() {
            try {
                AttributedStringIterator other = (AttributedStringIterator) super.clone();
                return other;
            }
            catch (CloneNotSupportedException e) {
                throw new InternalError();
            }
        }
        
        // CharacterIterator methods. See documentation in that interface.
        
        public char first() {
            return internalSetIndex(beginIndex);
        }
        
        public char last() {
            if (endIndex == beginIndex) {
                return internalSetIndex(endIndex);
            } else {
                return internalSetIndex(endIndex - 1);
            }
        }
        
        public char current() {
            if (currentIndex == endIndex) {
                return DONE;
            } else {
                return charAt(currentIndex);
            }
        }

        public char next() {
            if (currentIndex < endIndex) {
                return internalSetIndex(currentIndex + 1);
            }
            else {
                return DONE;
            }
        }

        public char previous() {
            if (currentIndex > beginIndex) {
                return internalSetIndex(currentIndex - 1);
            }
            else {
                return DONE;
            }
        }

        public char setIndex(int position) {
            if (position < beginIndex || position > endIndex)
                throw new IllegalArgumentException("Invalid index");
            return internalSetIndex(position);
        }

        public int getBeginIndex() {
            return beginIndex;
        }

        public int getEndIndex() {
            return endIndex;
        }

        public int getIndex() {
            return currentIndex;
        }

        // AttributedCharacterIterator methods. See documentation in that interface.

        public int getRunStart() {
            return currentRunStart;
        }
        
        public int getRunStart(Attribute attribute) {
            if (currentRunStart == beginIndex || currentRunIndex == -1) {
                return currentRunStart;
            } else {
                Object value = getAttribute(attribute);
                int runStart = currentRunStart;
                int runIndex = currentRunIndex;
                while (runStart > beginIndex &&
                        valuesMatch(value, AttributedString.this.getAttribute(attribute, runIndex - 1))) {
                    runIndex--;
                    runStart = runStarts[runIndex];
                }
                if (runStart < beginIndex) {
                    runStart = beginIndex;
                }
                return runStart;
            }
        }

        public int getRunStart(Set attributes) {
            if (currentRunStart == beginIndex || currentRunIndex == -1) {
                return currentRunStart;
            } else {
                int runStart = currentRunStart;
                int runIndex = currentRunIndex;
                while (runStart > beginIndex &&
                        AttributedString.this.attributeValuesMatch(attributes, currentRunIndex, runIndex - 1)) {
                    runIndex--;
                    runStart = runStarts[runIndex];
                }
                if (runStart < beginIndex) {
                    runStart = beginIndex;
                }
                return runStart;
            }
        }

        public int getRunLimit() {
            return currentRunLimit;
        }
        
        public int getRunLimit(Attribute attribute) {
            if (currentRunLimit == endIndex || currentRunIndex == -1) {
                return currentRunLimit;
            } else {
                Object value = getAttribute(attribute);
                int runLimit = currentRunLimit;
                int runIndex = currentRunIndex;
                while (runLimit < endIndex &&
                        valuesMatch(value, AttributedString.this.getAttribute(attribute, runIndex + 1))) {
                    runIndex++;
                    runLimit = runIndex < runCount - 1 ? runStarts[runIndex + 1] : endIndex;
                }
                if (runLimit > endIndex) {
                    runLimit = endIndex;
                }
                return runLimit;
            }
        }
        
        public int getRunLimit(Set attributes) {
            if (currentRunLimit == endIndex || currentRunIndex == -1) {
                return currentRunLimit;
            } else {
                int runLimit = currentRunLimit;
                int runIndex = currentRunIndex;
                while (runLimit < endIndex &&
                        AttributedString.this.attributeValuesMatch(attributes, currentRunIndex, runIndex + 1)) {
                    runIndex++;
                    runLimit = runIndex < runCount - 1 ? runStarts[runIndex + 1] : endIndex;
                }
                if (runLimit > endIndex) {
                    runLimit = endIndex;
                }
                return runLimit;
            }
        }
        
        public Map getAttributes() {
            if (runAttributes == null || currentRunIndex == -1 || runAttributes[currentRunIndex] == null) {
                // ??? would be nice to return null, but current spec doesn't allow it
                // returning Hashtable saves AttributeMap from dealing with emptiness
                return new Hashtable();
            }
            return new AttributeMap(currentRunIndex, beginIndex, endIndex);
        }
        
        public Set getAllAttributeKeys() {
            // ??? This should screen out attribute keys that aren't relevant to the client
            if (runAttributes == null) {
                // ??? would be nice to return null, but current spec doesn't allow it
                // returning HashSet saves us from dealing with emptiness
                return new HashSet();
            }
            synchronized (AttributedString.this) {
                // ??? should try to create this only once, then update if necessary,
                // and give callers read-only view
                Set keys = new HashSet();
                int i = 0;
                while (i < runCount) {
                    if (runStarts[i] < endIndex && (i == runCount - 1 || runStarts[i + 1] > beginIndex)) {
                        Vector currentRunAttributes = runAttributes[i];
                        if (currentRunAttributes != null) {
                            int j = currentRunAttributes.size();
                            while (j-- > 0) {
                                keys.add(currentRunAttributes.get(j));
                            }
                        }
                    }
                    i++;
                }
                return keys;
            }
        }
        
        public Object getAttribute(Attribute attribute) {
            int runIndex = currentRunIndex;
            if (runIndex < 0) {
                return null;
            }
            return AttributedString.this.getAttributeCheckRange(attribute, runIndex, beginIndex, endIndex);
        }
        
        // internally used methods
        
        private AttributedString getString() {
            return AttributedString.this;
        }
        
        // set the current index, update information about the current run if necessary,
        // return the character at the current index
        private char internalSetIndex(int position) {
            currentIndex = position;
            if (position < currentRunStart || position >= currentRunLimit) {
                updateRunInfo();
            }
            if (currentIndex == endIndex) {
                return DONE;
            } else {
                return charAt(position);
            }
        }

        // update the information about the current run
        private void updateRunInfo() {
            if (currentIndex == endIndex) {
                currentRunStart = currentRunLimit = endIndex;
                currentRunIndex = -1;
            } else {
                synchronized (AttributedString.this) {
                    int runIndex = -1;
                    while (runIndex < runCount - 1 && runStarts[runIndex + 1] <= currentIndex)
                        runIndex++;
                    currentRunIndex = runIndex;
                    if (runIndex >= 0) {
                        currentRunStart = runStarts[runIndex];
                        if (currentRunStart < beginIndex)
                            currentRunStart = beginIndex;
                    }
                    else {
                        currentRunStart = beginIndex;
                    }
                    if (runIndex < runCount - 1) {
                        currentRunLimit = runStarts[runIndex + 1];
                        if (currentRunLimit > endIndex)
                            currentRunLimit = endIndex;
                    }
                    else {
                        currentRunLimit = endIndex;
                    }
                }
            }
        }

    }

    // the map class associated with this string class, giving access to the attributes of one run

    final private class AttributeMap extends AbstractMap {
    
        int runIndex;
        int beginIndex;
        int endIndex;

        AttributeMap(int runIndex, int beginIndex, int endIndex) {
            this.runIndex = runIndex;
            this.beginIndex = beginIndex;
            this.endIndex = endIndex;
        }

        public Set entrySet() {
            HashSet set = new HashSet();
            synchronized (AttributedString.this) {
                int size = runAttributes[runIndex].size();
                for (int i = 0; i < size; i++) {
                    Attribute key = (Attribute) runAttributes[runIndex].get(i);
                    Object value = runAttributeValues[runIndex].get(i);
                    if (value instanceof Annotation) {
                        value = AttributedString.this.getAttributeCheckRange(key,
							     runIndex, beginIndex, endIndex);
                        if (value == null) {
                            continue;
                        }
                    }
                    Map.Entry entry = new AttributeEntry(key, value);
                    set.add(entry);
                }
            }
            return set;
        }
        
        public Object get(Object key) {
            return AttributedString.this.getAttributeCheckRange((Attribute) key, runIndex, beginIndex, endIndex);
        }
    }
}

class AttributeEntry implements Map.Entry {

    private Attribute key;
    private Object value;

    AttributeEntry(Attribute key, Object value) {
        this.key = key;
        this.value = value;
    }
    
    public boolean equals(Object o) {
        if (!(o instanceof AttributeEntry)) {
            return false;
        }
        AttributeEntry other = (AttributeEntry) o;
        return other.key.equals(key) &&
            (value == null ? other.value == null : other.value.equals(value));
    }
    
    public Object getKey() {
        return key;
    }
    
    public Object getValue() {
        return value;
    }
    
    public Object setValue(Object newValue) {
        throw new UnsupportedOperationException();
    }
    
    public int hashCode() {
        return key.hashCode() ^ (value==null ? 0 : value.hashCode());
    }

    public String toString() {
        return key.toString()+"="+value.toString();
    }
}