/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package subclassed.android.util;
/**
* Container for a dynamically typed data value. Primarily used with
* {@link android.content.res.Resources} for holding resource values.
*/
public class TypedValue {
/** The value contains no data. */
public static final int TYPE_NULL = 0x00;
/** The <var>data</var> field holds a resource identifier. */
public static final int TYPE_REFERENCE = 0x01;
/** The <var>data</var> field holds an attribute resource
* identifier (referencing an attribute in the current theme
* style, not a resource entry). */
public static final int TYPE_ATTRIBUTE = 0x02;
/** The <var>string</var> field holds string data. In addition, if
* <var>data</var> is non-zero then it is the string block
* index of the string and <var>assetCookie</var> is the set of
* assets the string came from. */
public static final int TYPE_STRING = 0x03;
/** The <var>data</var> field holds an IEEE 754 floating point number. */
public static final int TYPE_FLOAT = 0x04;
/** The <var>data</var> field holds a complex number encoding a
* dimension value. */
public static final int TYPE_DIMENSION = 0x05;
/** The <var>data</var> field holds a complex number encoding a fraction
* of a container. */
public static final int TYPE_FRACTION = 0x06;
/** Identifies the start of plain integer values. Any type value
* from this to {@link #TYPE_LAST_INT} means the
* <var>data</var> field holds a generic integer value. */
public static final int TYPE_FIRST_INT = 0x10;
/** The <var>data</var> field holds a number that was
* originally specified in decimal. */
public static final int TYPE_INT_DEC = 0x10;
/** The <var>data</var> field holds a number that was
* originally specified in hexadecimal (0xn). */
public static final int TYPE_INT_HEX = 0x11;
/** The <var>data</var> field holds 0 or 1 that was originally
* specified as "false" or "true". */
public static final int TYPE_INT_BOOLEAN = 0x12;
/** Identifies the start of integer values that were specified as
* color constants (starting with '#'). */
public static final int TYPE_FIRST_COLOR_INT = 0x1c;
/** The <var>data</var> field holds a color that was originally
* specified as #aarrggbb. */
public static final int TYPE_INT_COLOR_ARGB8 = 0x1c;
/** The <var>data</var> field holds a color that was originally
* specified as #rrggbb. */
public static final int TYPE_INT_COLOR_RGB8 = 0x1d;
/** The <var>data</var> field holds a color that was originally
* specified as #argb. */
public static final int TYPE_INT_COLOR_ARGB4 = 0x1e;
/** The <var>data</var> field holds a color that was originally
* specified as #rgb. */
public static final int TYPE_INT_COLOR_RGB4 = 0x1f;
/** Identifies the end of integer values that were specified as color
* constants. */
public static final int TYPE_LAST_COLOR_INT = 0x1f;
/** Identifies the end of plain integer values. */
public static final int TYPE_LAST_INT = 0x1f;
/* ------------------------------------------------------------ */
/** Complex data: bit location of unit information. */
public static final int COMPLEX_UNIT_SHIFT = 0;
/** Complex data: mask to extract unit information (after shifting by
* {@link #COMPLEX_UNIT_SHIFT}). This gives us 16 possible types, as
* defined below. */
public static final int COMPLEX_UNIT_MASK = 0xf;
/** {@link #TYPE_DIMENSION} complex unit: Value is raw pixels. */
public static final int COMPLEX_UNIT_PX = 0;
/** {@link #TYPE_DIMENSION} complex unit: Value is Device Independent
* Pixels. */
public static final int COMPLEX_UNIT_DIP = 1;
/** {@link #TYPE_DIMENSION} complex unit: Value is a scaled pixel. */
public static final int COMPLEX_UNIT_SP = 2;
/** {@link #TYPE_DIMENSION} complex unit: Value is in points. */
public static final int COMPLEX_UNIT_PT = 3;
/** {@link #TYPE_DIMENSION} complex unit: Value is in inches. */
public static final int COMPLEX_UNIT_IN = 4;
/** {@link #TYPE_DIMENSION} complex unit: Value is in millimeters. */
public static final int COMPLEX_UNIT_MM = 5;
/** {@link #TYPE_FRACTION} complex unit: A basic fraction of the overall
* size. */
public static final int COMPLEX_UNIT_FRACTION = 0;
/** {@link #TYPE_FRACTION} complex unit: A fraction of the parent size. */
public static final int COMPLEX_UNIT_FRACTION_PARENT = 1;
/** Complex data: where the radix information is, telling where the decimal
* place appears in the mantissa. */
public static final int COMPLEX_RADIX_SHIFT = 4;
/** Complex data: mask to extract radix information (after shifting by
* {@link #COMPLEX_RADIX_SHIFT}). This give us 4 possible fixed point
* representations as defined below. */
public static final int COMPLEX_RADIX_MASK = 0x3;
/** Complex data: the mantissa is an integral number -- i.e., 0xnnnnnn.0 */
public static final int COMPLEX_RADIX_23p0 = 0;
/** Complex data: the mantissa magnitude is 16 bits -- i.e, 0xnnnn.nn */
public static final int COMPLEX_RADIX_16p7 = 1;
/** Complex data: the mantissa magnitude is 8 bits -- i.e, 0xnn.nnnn */
public static final int COMPLEX_RADIX_8p15 = 2;
/** Complex data: the mantissa magnitude is 0 bits -- i.e, 0x0.nnnnnn */
public static final int COMPLEX_RADIX_0p23 = 3;
/** Complex data: bit location of mantissa information. */
public static final int COMPLEX_MANTISSA_SHIFT = 8;
/** Complex data: mask to extract mantissa information (after shifting by
* {@link #COMPLEX_MANTISSA_SHIFT}). This gives us 23 bits of precision;
* the top bit is the sign. */
public static final int COMPLEX_MANTISSA_MASK = 0xffffff;
/* ------------------------------------------------------------ */
/**
* If {@link #density} is equal to this value, then the density should be
* treated as the system's default density value: {@link DisplayMetrics#DENSITY_DEFAULT}.
*/
public static final int DENSITY_DEFAULT = 0;
/**
* If {@link #density} is equal to this value, then there is no density
* associated with the resource and it should not be scaled.
*/
public static final int DENSITY_NONE = 0xffff;
/* ------------------------------------------------------------ */
/** The type held by this value, as defined by the constants here.
* This tells you how to interpret the other fields in the object. */
public int type;
private static final float MANTISSA_MULT =
1.0f / (1<<TypedValue.COMPLEX_MANTISSA_SHIFT);
private static final float[] RADIX_MULTS = new float[] {
1.0f*MANTISSA_MULT, 1.0f/(1<<7)*MANTISSA_MULT,
1.0f/(1<<15)*MANTISSA_MULT, 1.0f/(1<<23)*MANTISSA_MULT
};
/**
* Retrieve the base value from a complex data integer. This uses the
* {@link #COMPLEX_MANTISSA_MASK} and {@link #COMPLEX_RADIX_MASK} fields of
* the data to compute a floating point representation of the number they
* describe. The units are ignored.
*
* @param complex A complex data value.
*
* @return A floating point value corresponding to the complex data.
*/
public static float complexToFloat(int complex)
{
return (complex&(TypedValue.COMPLEX_MANTISSA_MASK
<<TypedValue.COMPLEX_MANTISSA_SHIFT))
* RADIX_MULTS[(complex>>TypedValue.COMPLEX_RADIX_SHIFT)
& TypedValue.COMPLEX_RADIX_MASK];
}
private static final String[] DIMENSION_UNIT_STRS = new String[] {
"px", "dip", "sp", "pt", "in", "mm"
};
private static final String[] FRACTION_UNIT_STRS = new String[] {
"%", "%p"
};
/**
* Perform type conversion as per {@link #coerceToString()} on an
* explicitly supplied type and data.
*
* @param type The data type identifier.
* @param data The data value.
*
* @return String The coerced string value. If the value is
* null or the type is not known, null is returned.
*/
public static final String coerceToString(int type, int data)
{
switch (type) {
case TYPE_NULL:
return null;
case TYPE_REFERENCE:
return "@" + data;
case TYPE_ATTRIBUTE:
return "?" + data;
case TYPE_FLOAT:
return Float.toString(Float.intBitsToFloat(data));
case TYPE_DIMENSION:
return Float.toString(complexToFloat(data)) + DIMENSION_UNIT_STRS[
(data>>COMPLEX_UNIT_SHIFT)&COMPLEX_UNIT_MASK];
case TYPE_FRACTION:
return Float.toString(complexToFloat(data)*100) + FRACTION_UNIT_STRS[
(data>>COMPLEX_UNIT_SHIFT)&COMPLEX_UNIT_MASK];
case TYPE_INT_HEX:
return "0x" + Integer.toHexString(data);
case TYPE_INT_BOOLEAN:
return data != 0 ? "true" : "false";
}
if (type >= TYPE_FIRST_COLOR_INT && type <= TYPE_LAST_COLOR_INT) {
return "#" + Integer.toHexString(data);
} else if (type >= TYPE_FIRST_INT && type <= TYPE_LAST_INT) {
return Integer.toString(data);
}
return null;
}
};