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/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2024 Apryse Group NV
    Authors: Apryse Software.

    This program is offered under a commercial and under the AGPL license.
    For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.

    AGPL licensing:
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see .
 */
package com.itextpdf.svg;

import com.itextpdf.styledxmlparser.CommonAttributeConstants;

/**
 * A class containing constant values signifying the proeprty names of tags, attribute, CSS-style
 * and certain values in SVG XML.
 */
public final class SvgConstants {

    private SvgConstants() {
    }

    /**
     * Class containing the constant property names for the tags in the SVG spec
     */
    public static final class Tags {
        /**
         * Tag defining a Hyperlink.
         */
        public static final String A = "a";

        /**
         * Alternate glyphs to be used instead of regular grlyphs, e.g. ligatures, Asian scripts, ...
         */
        public static final String ALT_GLYPH = "altGlyph";

        /**
         * Defines a set of glyph substitions.
         */
        public static final String ALT_GLYPH_DEF = "altGlyphDef";

        /**
         * Defines a candidate set of glyph substitutions.
         */
        public static final String ALT_GLYPH_ITEM = "altGlyphItem";

        /**
         * Not supported in PDF.
         */
        public static final String ANIMATE = "animate";

        /**
         * Not supported in PDF.
         */
        public static final String ANIMATE_MOTION = "animateMotion";

        /**
         * Not supported in PDF.
         */
        public static final String ANIMATE_COLOR = "animateColor";

        /**
         * Not supported in PDF.
         */
        public static final String ANIMATE_TRANSFORM = "animateTransform";

        /**
         * Tag defining a {@link com.itextpdf.svg.renderers.impl.CircleSvgNodeRenderer circle}.
         *
         * @since 7.1.2
         */
        public static final String CIRCLE = "circle";

        /**
         * Tag defining a clipping path. A clipping path defines the region where can be drawn. Anything outside the path won't be drawn.
         */
        public static final String CLIP_PATH = "clipPath";

        /**
         * Tag defining the color profile to be used.
         */
        public static final String COLOR_PROFILE = "color-profile";

        /**
         * Not supported in PDF
         */
        public static final String CURSOR = "cursor";

        /**
         * Tag defining objects that can be reused from another context
         */
        public static final String DEFS = "defs";


        /**
         * Tag defining the description of its parent element
         */
        public static final String DESC = "desc";

        /**
         * Tag defining an {@link com.itextpdf.svg.renderers.impl.EllipseSvgNodeRenderer ellipse}.
         *
         * @since 7.1.2
         */
        public static final String ELLIPSE = "ellipse";

        /**
         * Tag defining how to blend two objects together.
         */
        public static final String FE_BLEND = "feBlend";

        /**
         * Tag defining the color matrix transformations that can be performed.
         */
        public static final String FE_COLOR_MATRIX = "feColorMatrix";

        /**
         * Tag defining color component remapping.
         */
        public static final String FE_COMPONENT_TRANSFER = "feComponentTransfer";

        /**
         * Tag defining the combination of two input images.
         */
        public static final String FE_COMPOSITE = "feComposite";

        /**
         * Tag defining a matrix convolution filter
         */
        public static final String FE_COMVOLVE_MATRIX = "feConvolveMatrix";

        /**
         * Tag defining the lighting map.
         */
        public static final String FE_DIFFUSE_LIGHTING = "feDiffuseLighting";

        /**
         * Tag defining the values to displace an image.
         */
        public static final String FE_DISPLACEMENT_MAP = "feDisplacementMap";

        /**
         * Tag defining a distant light source.
         */
        public static final String FE_DISTANT_LIGHT = "feDistantLight";

        /**
         * Tag defining the fill of a subregion.
         */
        public static final String FE_FLOOD = "feFlood";

        /**
         * Tag defining the transfer function for the Alpha component.
         */
        public static final String FE_FUNC_A = "feFuncA";

        /**
         * Tag defining the transfer function for the Blue component.
         */
        public static final String FE_FUNC_B = "feFuncB";

        /**
         * Tag defining the transfer function for the Green component.
         */
        public static final String FE_FUNC_G = "feFuncG";

        /**
         * Tag defining the transfer function for the Red component.
         */
        public static final String FE_FUNC_R = "feFuncR";

        /**
         * Tag defining the blur values.
         */
        public static final String FE_GAUSSIAN_BLUR = "feGaussianBlur";

        /**
         * Tag defining a image data from a source.
         */
        public static final String FE_IMAGE = "feImage";

        /**
         * Tag defining that filters will be applied concurrently instead of sequentially.
         */
        public static final String FE_MERGE = "feMerge";

        /**
         * Tag defining a node in a merge.
         */
        public static final String FE_MERGE_NODE = "feMergeNode";

        /**
         * Tag defining the erosion or dilation of an image.
         */
        public static final String FE_MORPHOLOGY = "feMorphology";

        /**
         * Tag defining the offset of an image.
         */
        public static final String FE_OFFSET = "feOffset";

        /**
         * Tag defining a point light effect.
         */
        public static final String FE_POINT_LIGHT = "fePointLight";

        /**
         * Tag defining a lighting map.
         */
        public static final String FE_SPECULAR_LIGHTING = "feSpecularLighting";

        /**
         * Tag defining a spotlight.
         */
        public static final String FE_SPOTLIGHT = "feSpotLight";

        /**
         * Tag defining a fill that can be repeated. Similar to PATTERN.
         */
        public static final String FE_TILE = "feTile";

        /**
         * Tag defining values for the perlin turbulence function.
         */
        public static final String FE_TURBULENCE = "feTurbulence";

        /**
         * Tag defining a collection of filter operations.
         */
        public static final String FILTER = "filter";

        /**
         * Tag defining a font.
         */
        public static final String FONT = "font";

        /**
         * Tag defining a font-face.
         */
        public static final String FONT_FACE = "font-face";

        /**
         * Tag defining the formats of the font.
         */
        public static final String FONT_FACE_FORMAT = "font-face-format";

        /**
         * Tag defining the name of the font.
         */
        public static final String FONT_FACE_NAME = "font-face-name";

        /**
         * Tag defining the source file of the font.
         */
        public static final String FONT_FACE_SRC = "font-face-src";

        /**
         * Tag defining the URI of a font.
         */
        public static final String FONT_FACE_URI = "font-face-uri";

        /**
         * Tag definign a foreign XML standard to be inserted. E.g. MathML
         */
        public static final String FOREIGN_OBJECT = "foreignObject";

        /**
         * Tag defining a group of elements.
         */
        public static final String G = "g";

        /**
         * Tag defining a single glyph.
         */
        public static final String GLYPH = "glyph";

        /**
         * Tag defining a sigle glyph for altGlyph.
         */
        public static final String GLYPH_REF = "glyphRef";

        /**
         * Tag defining the horizontal kerning values in between two glyphs.
         */
        public static final String HKERN = "hkern";

        /**
         * Tag defining an image.
         */
        public static final String IMAGE = "image";

        /**
         * Tag defining a {@link com.itextpdf.svg.renderers.impl.LineSvgNodeRenderer line}.
         *
         * @since 7.1.2
         */
        public static final String LINE = "line";

        /**
         * Tag defining a {@link com.itextpdf.svg.renderers.impl.LinearGradientSvgNodeRenderer linear gradient}.
         */
        public static final String LINEAR_GRADIENT = "linearGradient";

        /**
         * Tag defining a link
         */
        public static final String LINK = "link";

        /**
         * Tag defining the graphics (arrowheads or polymarkers) to be drawn at the end of paths, lines, etc.
         */
        public static final String MARKER = "marker";

        /**
         * Tag defining a mask.
         */
        public static final String MASK = "mask";

        /**
         * Tag defining metadata.
         */
        public static final String METADATA = "metadata";

        /**
         * Tag defining content to be rendered if a glyph is missing from the font.
         */
        public static final String MISSING_GLYPH = "missing-glyph";

        /**
         * Not supported in PDF
         */
        public static final String MPATH = "mpath";

        /**
         * Tag defining a {@link com.itextpdf.svg.renderers.impl.PathSvgNodeRenderer path}.
         *
         * @since 7.1.2
         */
        public static final String PATH = "path";

        /**
         * Tag defining a graphical object that can be repeated.
         */
        public static final String PATTERN = "pattern";

        /**
         * Tag defining a {@link com.itextpdf.svg.renderers.impl.PolygonSvgNodeRenderer polygon} shape.
         *
         * @since 7.1.2
         */
        public static final String POLYGON = "polygon";

        /**
         * Tag defining a {@link com.itextpdf.svg.renderers.impl.PolylineSvgNodeRenderer polyline} shape.
         *
         * @since 7.1.2
         */
        public static final String POLYLINE = "polyline";

        /**
         * Tag defining a radial gradient
         */
        public static final String RADIAL_GRADIENT = "radialGradient";

        /**
         * Tag defining a {@link com.itextpdf.svg.renderers.impl.RectangleSvgNodeRenderer rectangle}.
         *
         * @since 7.1.2
         */
        public static final String RECT = "rect";

        /**
         * Not supported in PDF.
         */
        public static final String SCRIPT = "script";

        /**
         * Not supported in PDF.
         */
        public static final String SET = "set";

        /**
         * Tag defining the ramp of colors in a gradient.
         */
        public static final String STOP = "stop";

        /**
         * Tag defining the color in stop point of a gradient.
         */
        public static final String STOP_COLOR = "stop-color";

        /**
         * Tag defining the opacity in stop point of a gradient.
         */
        public static final String STOP_OPACITY = "stop-opacity";

        /**
         * Tag defining the style to be.
         */
        public static final String STYLE = "style";

        /**
         * Tag defining an {@link com.itextpdf.svg.renderers.impl.SvgTagSvgNodeRenderer SVG} element.
         *
         * @since 7.1.2
         */
        public static final String SVG = "svg";

        /**
         * Tag defining a switch element.
         */
        public static final String SWITCH = "switch";

        /**
         * Tag defining graphical templates that can be reused by the use tag.
         */
        public static final String SYMBOL = "symbol";

        /**
         * Tag defining text to be drawn on a page/screen.
         *
         * @since 7.1.2
         */
        public static final String TEXT = "text";

        /**
         * Phantom tag for text leaf.
         */
        public static final String TEXT_LEAF = ":text-leaf";

        /**
         * Tag defining a path on which text can be drawn.
         */
        public static final String TEXT_PATH = "textPath";

        /**
         * Tag defining the description of an element. Is not rendered.
         */
        public static final String TITLE = "title";

        /**
         * Tag defining a span within a text element.
         */
        public static final String TSPAN = "tspan";

        /**
         * Tag defining the use of a named object.
         */
        public static final String USE = "use";

        /**
         * Tag defining how to view the image.
         */
        public static final String VIEW = "view";

        /**
         * Tag defining the vertical kerning values in between two glyphs.
         */
        public static final String VKERN = "vkern";
    }

    /**
     * Class containing the constant property names for the attributes of tags in the SVG spec
     */
    public static final class Attributes extends CommonAttributeConstants {

        /**
         * Attribute defining the clipping path to be applied to a specific shape or group of shapes.
         */
        public static final String CLIP_PATH = "clip-path";

        /**
         * Attribute defining the clipping rule in a clipping path (or element thereof).
         */
        public static final String CLIP_RULE = "clip-rule";

        /**
         * Attribute defining the x value of the center of a circle or ellipse.
         */
        public static final String CX = "cx";

        /**
         * Attribute defining the y value of the center of a circle or ellipse.
         */
        public static final String CY = "cy";

        /**
         * Attribute defining the outline of a shape.
         */
        public static final String D = "d";

        /**
         * Attribute defining the relative x-translation of a text-element
         */
        public static final String DX = "dx";

        /**
         * Attribute defining the relative y-translation of a text-element
         */
        public static final String DY = "dy";

        /**
         * Attribute defining the fill color.
         */
        public static final String FILL = "fill";

        /**
         * Attribute defining the fill opacity.
         */
        public static final String FILL_OPACITY = "fill-opacity";

        /**
         * Attribute defining the fill rule.
         */
        public static final String FILL_RULE = "fill-rule";

        /**
         * Attribute defining the font family.
         */
        public static final String FONT_FAMILY = "font-family";

        /**
         * Attribute defining the font weight.
         */
        public static final String FONT_WEIGHT = "font-weight";

        /**
         * Attribute defining the font style.
         */
        public static final String FONT_STYLE = "font-style";

        /**
         * Attribute defining the font size.
         */
        public static final String FONT_SIZE = "font-size";

        /**
         * The Constant ITALIC.
         */
        public static final String ITALIC = "italic";

        /**
         * The Constant BOLD.
         */
        public static final String BOLD = "bold";

        /**
         * Attribute defining the units relation for a color gradient.
         */
        public static final String GRADIENT_UNITS = "gradientUnits";

        /**
         * Attribute defining the transformations for a color gradient.
         */
        public static final String GRADIENT_TRANSFORM = "gradientTransform";

        /**
         * Attribute defining the height. Used in several elements.
         */
        public static final String HEIGHT = "height";

        /**
         * Attribute defining the href value.
         */
        public static final String HREF = "href";

        /**
         * Attribute defining the unique id of an element.
         */
        public static final String ID = "id";

        /**
         * Attribute defining the marker to use at the end of a path, line, polygon or polyline
         */
        public static final String MARKER_END = "marker-end";

        /**
         * Attribute defining the height of the viewport in which the marker is to be fitted
         */
        public static final String MARKER_HEIGHT = "markerHeight";

        /**
         * Attribute defining the marker drawn at every other vertex but the start and end of a path, line, polygon or polyline
         */
        public static final String MARKER_MID = "marker-mid";

        /**
         * Attribute defining the marker to use at the start of a path, line, polygon or polyline
         */
        public static final String MARKER_START = "marker-start";

        /**
         * Attribute defining the width of the viewport in which the marker is to be fitted
         */
        public static final String MARKER_WIDTH = "markerWidth";

        /**
         * Attribute defining the coordinate system for attributes ‘markerWidth’, ‘markerHeight’ and the contents of the ‘marker’.
         */
        public static final String MARKER_UNITS = "markerUnits";

        /**
         * Attribute defining the offset of a stop color for gradients.
         */
        public static final String OFFSET = "offset";

        /**
         * Attribute defining the opacity of a group or graphic element.
         */
        public static final String OPACITY = "opacity";

        /**
         * Attribute defining the orientation of a marker
         */
        public static final String ORIENT = "orient";

        /**
         * Close Path Operator.
         */
        public static final String PATH_DATA_CLOSE_PATH = "Z";

        /**
         * CurveTo Path Operator.
         */
        public static final String PATH_DATA_CURVE_TO = "C";

        /**
         * Relative CurveTo Path Operator.
         */
        public static final String PATH_DATA_REL_CURVE_TO = "c";

        /**
         * Attribute defining Elliptical arc path operator.
         */
        public static final String PATH_DATA_ELLIPTICAL_ARC_A = "A";

        /**
         * Attribute defining Elliptical arc path operator.
         */
        public static final String PATH_DATA_REL_ELLIPTICAL_ARC_A = "a";
        /**
         * Smooth CurveTo Path Operator.
         */
        public static final String PATH_DATA_CURVE_TO_S = "S";

        /**
         * Relative Smooth CurveTo Path Operator.
         */
        public static final String PATH_DATA_REL_CURVE_TO_S = "s";
        /**
         * Absolute LineTo Path Operator.
         */
        public static final String PATH_DATA_LINE_TO = "L";

        /**
         * Absolute hrizontal LineTo Path Operator.
         */
        public static final String PATH_DATA_LINE_TO_H = "H";

        /**
         * Relative horizontal LineTo Path Operator.
         */
        public static final String PATH_DATA_REL_LINE_TO_H = "h";

        /**
         * Absolute vertical LineTo Path operator.
         */
        public static final String PATH_DATA_LINE_TO_V = "V";

        /**
         * Relative vertical LineTo Path operator.
         */
        public static final String PATH_DATA_REL_LINE_TO_V = "v";

        /**
         * Relative LineTo Path Operator.
         */
        public static final String PATH_DATA_REL_LINE_TO = "l";

        /**
         * MoveTo Path Operator.
         */
        public static final String PATH_DATA_MOVE_TO = "M";

        /**
         * Relative MoveTo Path Operator.
         */
        public static final String PATH_DATA_REL_MOVE_TO = "m";

        /**
         * Shorthand/smooth quadratic Bézier curveto.
         */
        public static final String PATH_DATA_SHORTHAND_CURVE_TO = "T";

        /**
         * Relative Shorthand/smooth quadratic Bézier curveto.
         */
        public static final String PATH_DATA_REL_SHORTHAND_CURVE_TO = "t";

        /**
         * Catmull-Rom curve command.
         */
        public static final String PATH_DATA_CATMULL_CURVE = "R";

        /**
         * Relative Catmull-Rom curve command.
         */
        public static final String PATH_DATA_REL_CATMULL_CURVE = "r";

        /**
         * Bearing command.
         */
        public static final String PATH_DATA_BEARING = "B";

        /**
         * Relative Bearing command.
         */
        public static final String PATH_DATA_REL_BEARING = "b";

        /**
         * Quadratic CurveTo Path Operator.
         */
        public static final String PATH_DATA_QUAD_CURVE_TO = "Q";

        /**
         * Relative Quadratic CurveTo Path Operator.
         */
        public static final String PATH_DATA_REL_QUAD_CURVE_TO = "q";

        /**
         * Attribute defining the coordinate system for the pattern content.
         */
        public static final String PATTERN_CONTENT_UNITS = "patternContentUnits";

        /**
         * Attribute defining list of transform definitions for the pattern element.
         */
        public static final String PATTERN_TRANSFORM = "patternTransform";

        /**
         * Attribute defining the coordinate system for attributes x, y, width , and height in pattern.
         */
        public static final String PATTERN_UNITS = "patternUnits";

        /**
         * Attribute defining the points of a polyline or polygon.
         */
        public static final String POINTS = "points";

        /**
         * Attribute defining how to preserve the aspect ratio when scaling.
         */
        public static final String PRESERVE_ASPECT_RATIO = "preserveAspectRatio";

        /**
         * Attribute defining the radius of a circle.
         */
        public static final String R = "r";

        /**
         * Attribute defining the x-axis coordinate of the reference point which is to be aligned exactly at the marker position.
         */
        public static final String REFX = "refX";

        /**
         * Attribute defining the y-axis coordinate of the reference point which is to be aligned exactly at the marker position.
         */
        public static final String REFY = "refY";

        /**
         * Attribute defining the x-axis of an ellipse or the x-axis radius of rounded rectangles.
         */
        public static final String RX = "rx";

        /**
         * Attribute defining the y-axis of an ellipse or the y-axis radius of rounded rectangles.
         */
        public static final String RY = "ry";

        /**
         * Attribute defining the spread method for a color gradient.
         */
        public static final String SPREAD_METHOD = "spreadMethod";

        /**
         * Attribute defining the stroke color.
         */
        public static final String STROKE = "stroke";

        /**
         * Attribute defining the stroke dash offset.
         */
        public static final String STROKE_DASHARRAY = "stroke-dasharray";

        /**
         * Attribute defining the stroke dash offset.
         */
        public static final String STROKE_DASHOFFSET = "stroke-dashoffset";

        /**
         * Attribute defining the stroke linecap.
         */
        public static final String STROKE_LINECAP = "stroke-linecap";

        /**
         * Attribute defining the stroke miterlimit.
         */
        public static final String STROKE_MITERLIMIT = "stroke-miterlimit";

        /**
         * Attribute defingin the stroke opacity.
         */
        public static final String STROKE_OPACITY = "stroke-opacity";

        /**
         * Attribute defining the stroke width.
         */
        public static final String STROKE_WIDTH = "stroke-width";

        /**
         * Attribute defining the style of an element.
         */
        public static final String STYLE = "style";

        /**
         * Attribute defining the text content of a text node.
         */
        public static final String TEXT_CONTENT = "text_content";

        /**
         * Attribute defining the text anchor used by the text
         */
        public static final String TEXT_ANCHOR = "text-anchor";

        /**
         * Attribute defining a transformation that needs to be applied.
         */
        public static final String TRANSFORM = "transform";

        /**
         * Attribute defining the viewbox of an element.
         */
        public static final String VIEWBOX = "viewBox";

        /**
         * Attribute defining the width of an element.
         */
        public static final String WIDTH = "width";

        /**
         * Attribute defining the x value of an element.
         */
        public static final String X = "x";

        /**
         * Attribute defining the first x coordinate value of a line.
         */
        public static final String X1 = "x1";

        /**
         * Attribute defining the second x coordinate value of a line.
         */
        public static final String X2 = "x2";

        /**
         * Attribute defining image source.
         */
        public static final String XLINK_HREF = "xlink:href";

        /**
         * Attribute defining XML namespace
         */
        public static final String XMLNS = "xmlns";

        /**
         * Attribute defining the y value of an element.
         */
        public static final String Y = "y";

        /**
         * Attribute defining the first y coordinate value of a line.
         */
        public static final String Y1 = "y1";

        /**
         * Attribute defining the second y coordinate value of a line.
         */
        public static final String Y2 = "y2";

        /**
         * Attribute defining version
         */
        public static final String VERSION = "version";
    }

    /**
     * Class containing the constants for values appearing in SVG tags and attributes
     */
    public static final class Values {

        /**
         * Value representing automatic orientation for the marker attribute orient.
         */
        public static final String AUTO = "auto";

        /**
         * Value representing reverse automatic orientation for the start marker.
         */
        public static final String AUTO_START_REVERSE = "auto-start-reverse";

        /**
         * Value representing the default value for the stroke linecap.
         */
        public static final String BUTT = "butt";

        /**
         * Value representing the default aspect ratio: xmidymid.
         */
        public static final String DEFAULT_ASPECT_RATIO = Values.XMID_YMID;

        /**
         * Value representing how to preserve the aspect ratio when dealing with images.
         */
        public static final String DEFER = "defer";

        /**
         * Value representing the fill rule "even odd".
         */
        public static final String FILL_RULE_EVEN_ODD = "evenodd";

        /**
         * Value representing the fill rule "nonzero".
         */
        public static final String FILL_RULE_NONZERO = "nonzero";

        /**
         * Value representing the meet for preserve aspect ratio calculations.
         */
        public static final String MEET = "meet";

        /**
         * Value representing the "none" value".
         */
        public static final String NONE = "none";

        /**
         * Value representing the units relation "objectBoundingBox".
         */
        public static final String OBJECT_BOUNDING_BOX = "objectBoundingBox";

        /**
         * The value representing slice for the preserve aspect ratio calculations;
         */
        public static final String SLICE = "slice";

        /**
         * Value representing the text-alignment end for text objects
         */
        public static final String TEXT_ANCHOR_END = "end";

        /**
         * Value representing the text-alignment middle for text objects
         */
        public static final String TEXT_ANCHOR_MIDDLE = "middle";

        /**
         * Value representing the text-alignment start for text objects
         */
        public static final String TEXT_ANCHOR_START = "start";

        /**
         * Value representing the gradient spread method "pad".
         */
        public static final String SPREAD_METHOD_PAD = "pad";

        /**
         * Value representing the gradient spread method "repeat".
         */
        public static final String SPREAD_METHOD_REPEAT = "repeat";

        /**
         * Value representing the gradient spread method "reflect".
         */
        public static final String SPREAD_METHOD_REFLECT = "reflect";

        /**
         * The value for markerUnits that represent values in a coordinate system which has a single unit equal the size in user units of the current stroke width.
         */
        public static final String STROKEWIDTH = "strokeWidth";

        /**
         * Value representing the units relation "userSpaceOnUse".
         */
        public static final String USER_SPACE_ON_USE = "userSpaceOnUse";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMIN_YMIN = "xminymin";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMIN_YMID = "xminymid";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMIN_YMAX = "xminymax";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMID_YMID = "xmidymid";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMID_YMIN = "xmidymin";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMID_YMAX = "xmidymax";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMAX_YMIN = "xmaxymin";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMAX_YMID = "xmaxymid";

        /**
         * Value representing how to align when scaling.
         */
        public static final String XMAX_YMAX = "xmaxymax";

        public static final String VERSION1_1 = "1.1";
    }
}