org.apache.batik.gvt.text.GVTAttributedCharacterIterator Maven / Gradle / Ivy
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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
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See the License for the specific language governing permissions and
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*/
package org.apache.batik.gvt.text;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;
import java.util.Map;
import java.util.Set;
/**
* GVTAttributedCharacterIterator
*
* Used to implement SVG <tspan> and <text>
* attributes. This implementation is designed for efficient support
* of per-character attributes (i.e. single character attribute spans).
* It supports an extended set of TextAttributes, via inner class
* SVGAttributedCharacterIterator.TextAttributes.
*
* @author Bill Haneman
* @version $Id: GVTAttributedCharacterIterator.java 1802297 2017-07-18 13:58:12Z ssteiner $
*/
public interface GVTAttributedCharacterIterator extends AttributedCharacterIterator {
/**
* Sets this iterator's contents to an unattributed copy of String s.
*/
void setString(String s);
/**
* Assigns this iterator's contents to be equivalent to AttributedString s.
*/
void setString(AttributedString s);
/**
* Sets values of a per-character attribute associated with the content
* string.
* Characters from beginIndex to endIndex
* (zero-offset) are assigned values for attribute key attr
* from the array attValues.
* If the length of attValues is less than character span
* (endIndex-beginIndex) the last value is duplicated;
* if attValues is longer than the character span
* the extra values are ignored.
* Note that if either beginIndex or endIndex are outside the bounds
* of the current character array they are clipped accordingly.
*/
void setAttributeArray(TextAttribute attr,
Object[] attValues, int beginIndex, int endIndex);
//From java.text.AttributedCharacterIterator
/**
* Get the keys of all attributes defined on the iterator's text range.
*/
Set getAllAttributeKeys();
/**
* Get the value of the named attribute for the current
* character.
*/
Object getAttribute(AttributedCharacterIterator.Attribute attribute);
/**
* Returns a map with the attributes defined on the current
* character.
*/
Map getAttributes();
/**
* Get the index of the first character following the
* run with respect to all attributes containing the current
* character.
*/
int getRunLimit();
/**
* Get the index of the first character following the
* run with respect to the given attribute containing the current
* character.
*/
int getRunLimit(AttributedCharacterIterator.Attribute attribute);
/**
* Get the index of the first character following the
* run with respect to the given attributes containing the current
* character.
*/
int getRunLimit(Set attributes);
/**
* Get the index of the first character of the run with
* respect to all attributes containing the current character.
*/
int getRunStart();
/**
* Get the index of the first character of the run with
* respect to the given attribute containing the current character.
* @param attribute The attribute for whose appearance the first offset
* is requested.
*/
int getRunStart(AttributedCharacterIterator.Attribute attribute);
/**
* Get the index of the first character of the run with
* respect to the given attributes containing the current character.
* @param attributes the Set of attributes which begins at the returned index.
*/
int getRunStart(Set attributes);
//From CharacterIterator
/**
* Create a copy of this iterator
*/
Object clone();
/**
* Get the character at the current position (as returned
* by getIndex()).
*
Specified by: java.text.CharacterIterator.
*/
char current();
/**
* Sets the position to getBeginIndex().
* @return the character at the start index of the text.
*
Specified by: java.text.CharacterIterator.
*/
char first();
/**
* Get the start index of the text.
*
Specified by: java.text.CharacterIterator.
*/
int getBeginIndex();
/**
* Get the end index of the text.
*
Specified by: java.text.CharacterIterator.
*/
int getEndIndex();
/**
* Get the current index.
*
Specified by: java.text.CharacterIterator.
*/
int getIndex();
/**
* Sets the position to getEndIndex()-1 (getEndIndex() if
* the text is empty) and returns the character at that position.
*
Specified by: java.text.CharacterIterator.
*/
char last();
/**
* Increments the iterator's index by one, returning the next character.
* @return the character at the new index.
*
Specified by: java.text.CharacterIterator.
*/
char next();
/**
* Decrements the iterator's index by one and returns
* the character at the new index.
*
Specified by: java.text.CharacterIterator.
*/
char previous();
/**
* Sets the position to the specified position in the text.
* @param position The new (current) index into the text.
* @return the character at new index position.
*
Specified by: java.text.CharacterIterator.
*/
char setIndex(int position);
//Inner classes:
/**
* Attribute keys that identify SVG text attributes. Anchor point for
* attribute values of X, Y, and ROTATION is determined by the character's
* font and other attributes.
* We duplicate the features of java.awt.font.TextAttribute rather than
* subclassing because java.awt.font.TextAttribute is final.
*/
class TextAttribute extends AttributedCharacterIterator.Attribute {
/** Construct a TextAttribute key with name s */
public TextAttribute(String s) {
super(s);
}
public static final TextAttribute FLOW_PARAGRAPH =
new TextAttribute("FLOW_PARAGRAPH");
public static final TextAttribute FLOW_EMPTY_PARAGRAPH =
new TextAttribute("FLOW_EMPTY_PARAGRAPH");
public static final TextAttribute FLOW_LINE_BREAK =
new TextAttribute("FLOW_LINE_BREAK");
public static final TextAttribute FLOW_REGIONS =
new TextAttribute("FLOW_REGIONS");
public static final TextAttribute LINE_HEIGHT =
new TextAttribute("LINE_HEIGHT");
public static final TextAttribute PREFORMATTED =
new TextAttribute("PREFORMATTED");
/** Attribute span delimiter - new tspan, tref, or textelement.*/
public static final TextAttribute TEXT_COMPOUND_DELIMITER =
new TextAttribute("TEXT_COMPOUND_DELIMITER");
/** Element identifier all chars from same element will share an
* ID. */
public static final TextAttribute TEXT_COMPOUND_ID =
new TextAttribute("TEXT_COMPOUND_ID");
/** Anchor type.*/
public static final TextAttribute ANCHOR_TYPE =
new TextAttribute("ANCHOR_TYPE");
/** Marker attribute indicating explicit glyph layout.*/
public static final TextAttribute EXPLICIT_LAYOUT =
new TextAttribute("EXPLICIT_LAYOUT");
/** User-space X coordinate for character.*/
public static final TextAttribute X = new TextAttribute("X");
/** User-space Y coordinate for character.*/
public static final TextAttribute Y = new TextAttribute("Y");
/** User-space relative X coordinate for character.*/
public static final TextAttribute DX = new TextAttribute("DX");
/** User-space relative Y coordinate for character.*/
public static final TextAttribute DY = new TextAttribute("DY");
/** Rotation for character, in degrees.*/
public static final TextAttribute ROTATION =
new TextAttribute("ROTATION");
/** All the paint attributes for the text.*/
public static final TextAttribute PAINT_INFO =
new TextAttribute("PAINT_INFO");
/** Author-expected width for bounding box containing
* all text string glyphs.
*/
public static final TextAttribute BBOX_WIDTH =
new TextAttribute("BBOX_WIDTH");
/** Method specified for adjusting text element layout size.
*/
public static final TextAttribute LENGTH_ADJUST =
new TextAttribute("LENGTH_ADJUST");
/** Convenience flag indicating that non-default glyph spacing is needed.
*/
public static final TextAttribute CUSTOM_SPACING =
new TextAttribute("CUSTOM_SPACING");
/** User-specified inter-glyph kerning value.
*/
public static final TextAttribute KERNING =
new TextAttribute("KERNING");
/** User-specified inter-glyph spacing value.
*/
public static final TextAttribute LETTER_SPACING =
new TextAttribute("LETTER_SPACING");
/** User-specified width for whitespace characters.
*/
public static final TextAttribute WORD_SPACING =
new TextAttribute("WORD_SPACING");
/** Path along which text is to be laid out */
public static final TextAttribute TEXTPATH =
new TextAttribute("TEXTPATH");
/** Font variant to be used for this character span.
* @see org.apache.batik.gvt.text.GVTAttributedCharacterIterator.TextAttribute#SMALL_CAPS
*/
public static final TextAttribute FONT_VARIANT =
new TextAttribute("FONT_VARIANT");
/** Baseline adjustment to be applied to this character span.
*/
public static final TextAttribute BASELINE_SHIFT =
new TextAttribute("BASELINE_SHIFT");
/** Directional writing mode applied to this character span.
*/
public static final TextAttribute WRITING_MODE =
new TextAttribute("WRITING_MODE");
public static final TextAttribute VERTICAL_ORIENTATION =
new TextAttribute("VERTICAL_ORIENTATION");
public static final TextAttribute VERTICAL_ORIENTATION_ANGLE =
new TextAttribute("VERTICAL_ORIENTATION_ANGLE");
public static final TextAttribute HORIZONTAL_ORIENTATION_ANGLE =
new TextAttribute("HORIZONTAL_ORIENTATION_ANGLE");
public static final TextAttribute GVT_FONT_FAMILIES =
new TextAttribute("GVT_FONT_FAMILIES");
public static final TextAttribute GVT_FONTS =
new TextAttribute("GVT_FONTS");
public static final TextAttribute GVT_FONT =
new TextAttribute("GVT_FONT");
public static final TextAttribute ALT_GLYPH_HANDLER =
new TextAttribute("ALT_GLYPH_HANDLER");
public static final TextAttribute BIDI_LEVEL =
new TextAttribute("BIDI_LEVEL");
public static final TextAttribute CHAR_INDEX =
new TextAttribute("CHAR_INDEX");
public static final TextAttribute ARABIC_FORM =
new TextAttribute("ARABIC_FORM");
public static final TextAttribute SCRIPT =
new TextAttribute("SCRIPT");
public static final TextAttribute LANGUAGE =
new TextAttribute("LANGUAGE");
// VALUES
/** Value for WRITING_MODE indicating left-to-right */
public static final Integer WRITING_MODE_LTR = 0x1;
/** Value for WRITING_MODE indicating right-to-left */
public static final Integer WRITING_MODE_RTL = 0x2;
/** Value for WRITING_MODE indicating top-to-botton */
public static final Integer WRITING_MODE_TTB = 0x3;
/** Value for VERTICAL_ORIENTATION indicating an angle */
public static final Integer ORIENTATION_ANGLE = 0x1;
/** Value for VERTICAL_ORIENTATION indicating auto */
public static final Integer ORIENTATION_AUTO = 0x2;
/** Value for FONT_VARIANT specifying small caps */
public static final Integer SMALL_CAPS = 0x10;
/** Value for UNDERLINE specifying underlining-on */
public static final Integer UNDERLINE_ON =
java.awt.font.TextAttribute.UNDERLINE_ON;
/** Value for OVERLINE specifying overlining-on */
public static final Boolean OVERLINE_ON = Boolean.TRUE;
/** Value for STRIKETHROUGH specifying strikethrough-on */
public static final Boolean STRIKETHROUGH_ON =
java.awt.font.TextAttribute.STRIKETHROUGH_ON;
/** Value for LENGTH_ADJUST specifying adjustment to inter-glyph spacing */
public static final Integer ADJUST_SPACING =
0x0;
/** Value for LENGTH_ADJUST specifying overall scaling of layout outlines */
public static final Integer ADJUST_ALL =
0x01;
// constant values for the arabic glyph forms
public static final Integer ARABIC_NONE = 0x0;
public static final Integer ARABIC_ISOLATED = 0x1;
public static final Integer ARABIC_TERMINAL = 0x2;
public static final Integer ARABIC_INITIAL = 0x3;
public static final Integer ARABIC_MEDIAL = 0x4;
}
/**
* Interface for helper class which mutates the attributes of an
* AttributedCharacterIterator.
* Typically used to convert location and rotation attributes to
* TextAttribute.TRANSFORM attributes, or convert between implementations
* of AttributedCharacterIterator.Attribute.
*/
interface AttributeFilter {
/**
* Modify an AttributedCharacterIterator's attributes systematically.
* Usually returns a copy since AttributedCharacterIterator instances
* are often immutable. The effect of the attribute modification
* is implementation dependent.
* @param aci an AttributedCharacterIterator whose attributes are
* to be modified.
* @return an instance of AttributedCharacterIterator with mutated
* attributes.
*/
AttributedCharacterIterator
mutateAttributes(AttributedCharacterIterator aci);
}
}