/*
* Copyright (C) 2008 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 com.android.layoutlib.bridge.impl;
import com.android.annotations.NonNull;
import com.android.ide.common.rendering.api.DensityBasedResourceValue;
import com.android.ide.common.rendering.api.LayoutLog;
import com.android.ide.common.rendering.api.RenderResources;
import com.android.ide.common.rendering.api.ResourceValue;
import com.android.layoutlib.bridge.Bridge;
import com.android.layoutlib.bridge.android.BridgeContext;
import com.android.layoutlib.bridge.android.BridgeXmlBlockParser;
import com.android.ninepatch.NinePatch;
import com.android.ninepatch.NinePatchChunk;
import com.android.resources.Density;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.content.res.ColorStateList;
import android.content.res.Resources.Theme;
import android.graphics.Bitmap;
import android.graphics.Bitmap_Delegate;
import android.graphics.NinePatch_Delegate;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.NinePatchDrawable;
import android.util.TypedValue;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Helper class to provide various conversion method used in handling android resources.
*/
public final class ResourceHelper {
private final static Pattern sFloatPattern = Pattern.compile("(-?[0-9]+(?:\\.[0-9]+)?)(.*)");
private final static float[] sFloatOut = new float[1];
private final static TypedValue mValue = new TypedValue();
/**
* Returns the color value represented by the given string value
* @param value the color value
* @return the color as an int
* @throws NumberFormatException if the conversion failed.
*/
public static int getColor(String value) {
if (value != null) {
if (!value.startsWith("#")) {
throw new NumberFormatException(
String.format("Color value '%s' must start with #", value));
}
value = value.substring(1);
// make sure it's not longer than 32bit
if (value.length() > 8) {
throw new NumberFormatException(String.format(
"Color value '%s' is too long. Format is either" +
"#AARRGGBB, #RRGGBB, #RGB, or #ARGB",
value));
}
if (value.length() == 3) { // RGB format
char[] color = new char[8];
color[0] = color[1] = 'F';
color[2] = color[3] = value.charAt(0);
color[4] = color[5] = value.charAt(1);
color[6] = color[7] = value.charAt(2);
value = new String(color);
} else if (value.length() == 4) { // ARGB format
char[] color = new char[8];
color[0] = color[1] = value.charAt(0);
color[2] = color[3] = value.charAt(1);
color[4] = color[5] = value.charAt(2);
color[6] = color[7] = value.charAt(3);
value = new String(color);
} else if (value.length() == 6) {
value = "FF" + value;
}
// this is a RRGGBB or AARRGGBB value
// Integer.parseInt will fail to parse strings like "ff191919", so we use
// a Long, but cast the result back into an int, since we know that we're only
// dealing with 32 bit values.
return (int)Long.parseLong(value, 16);
}
throw new NumberFormatException();
}
public static ColorStateList getColorStateList(ResourceValue resValue, BridgeContext context) {
String value = resValue.getValue();
if (value != null && !RenderResources.REFERENCE_NULL.equals(value)) {
// first check if the value is a file (xml most likely)
File f = new File(value);
if (f.isFile()) {
try {
// let the framework inflate the ColorStateList from the XML file, by
// providing an XmlPullParser
XmlPullParser parser = ParserFactory.create(f);
BridgeXmlBlockParser blockParser = new BridgeXmlBlockParser(
parser, context, resValue.isFramework());
try {
return ColorStateList.createFromXml(context.getResources(), blockParser);
} finally {
blockParser.ensurePopped();
}
} catch (XmlPullParserException e) {
Bridge.getLog().error(LayoutLog.TAG_BROKEN,
"Failed to configure parser for " + value, e, null /*data*/);
// we'll return null below.
} catch (Exception e) {
// this is an error and not warning since the file existence is
// checked before attempting to parse it.
Bridge.getLog().error(LayoutLog.TAG_RESOURCES_READ,
"Failed to parse file " + value, e, null /*data*/);
return null;
}
} else {
// try to load the color state list from an int
try {
int color = ResourceHelper.getColor(value);
return ColorStateList.valueOf(color);
} catch (NumberFormatException e) {
Bridge.getLog().error(LayoutLog.TAG_RESOURCES_FORMAT,
"Failed to convert " + value + " into a ColorStateList", e,
null /*data*/);
return null;
}
}
}
return null;
}
/**
* Returns a drawable from the given value.
* @param value The value that contains a path to a 9 patch, a bitmap or a xml based drawable,
* or an hexadecimal color
* @param context the current context
*/
public static Drawable getDrawable(ResourceValue value, BridgeContext context) {
return getDrawable(value, context, null);
}
/**
* Returns a drawable from the given value.
* @param value The value that contains a path to a 9 patch, a bitmap or a xml based drawable,
* or an hexadecimal color
* @param context the current context
* @param theme the theme to be used to inflate the drawable.
*/
public static Drawable getDrawable(ResourceValue value, BridgeContext context, Theme theme) {
if (value == null) {
return null;
}
String stringValue = value.getValue();
if (RenderResources.REFERENCE_NULL.equals(stringValue)) {
return null;
}
String lowerCaseValue = stringValue.toLowerCase();
Density density = Density.MEDIUM;
if (value instanceof DensityBasedResourceValue) {
density =
((DensityBasedResourceValue)value).getResourceDensity();
}
if (lowerCaseValue.endsWith(NinePatch.EXTENSION_9PATCH)) {
File file = new File(stringValue);
if (file.isFile()) {
try {
return getNinePatchDrawable(
new FileInputStream(file), density, value.isFramework(),
stringValue, context);
} catch (IOException e) {
// failed to read the file, we'll return null below.
Bridge.getLog().error(LayoutLog.TAG_RESOURCES_READ,
"Failed lot load " + file.getAbsolutePath(), e, null /*data*/);
}
}
return null;
} else if (lowerCaseValue.endsWith(".xml")) {
// create a block parser for the file
File f = new File(stringValue);
if (f.isFile()) {
try {
// let the framework inflate the Drawable from the XML file.
XmlPullParser parser = ParserFactory.create(f);
BridgeXmlBlockParser blockParser = new BridgeXmlBlockParser(
parser, context, value.isFramework());
try {
return Drawable.createFromXml(context.getResources(), blockParser, theme);
} finally {
blockParser.ensurePopped();
}
} catch (Exception e) {
// this is an error and not warning since the file existence is checked before
// attempting to parse it.
Bridge.getLog().error(null, "Failed to parse file " + stringValue,
e, null /*data*/);
}
} else {
Bridge.getLog().error(LayoutLog.TAG_BROKEN,
String.format("File %s does not exist (or is not a file)", stringValue),
null /*data*/);
}
return null;
} else {
File bmpFile = new File(stringValue);
if (bmpFile.isFile()) {
try {
Bitmap bitmap = Bridge.getCachedBitmap(stringValue,
value.isFramework() ? null : context.getProjectKey());
if (bitmap == null) {
bitmap = Bitmap_Delegate.createBitmap(bmpFile, false /*isMutable*/,
density);
Bridge.setCachedBitmap(stringValue, bitmap,
value.isFramework() ? null : context.getProjectKey());
}
return new BitmapDrawable(context.getResources(), bitmap);
} catch (IOException e) {
// we'll return null below
Bridge.getLog().error(LayoutLog.TAG_RESOURCES_READ,
"Failed lot load " + bmpFile.getAbsolutePath(), e, null /*data*/);
}
} else {
// attempt to get a color from the value
try {
int color = getColor(stringValue);
return new ColorDrawable(color);
} catch (NumberFormatException e) {
// we'll return null below.
Bridge.getLog().error(LayoutLog.TAG_RESOURCES_FORMAT,
"Failed to convert " + stringValue + " into a drawable", e,
null /*data*/);
}
}
}
return null;
}
private static Drawable getNinePatchDrawable(InputStream inputStream, Density density,
boolean isFramework, String cacheKey, BridgeContext context) throws IOException {
// see if we still have both the chunk and the bitmap in the caches
NinePatchChunk chunk = Bridge.getCached9Patch(cacheKey,
isFramework ? null : context.getProjectKey());
Bitmap bitmap = Bridge.getCachedBitmap(cacheKey,
isFramework ? null : context.getProjectKey());
// if either chunk or bitmap is null, then we reload the 9-patch file.
if (chunk == null || bitmap == null) {
try {
NinePatch ninePatch = NinePatch.load(inputStream, true /*is9Patch*/,
false /* convert */);
if (ninePatch != null) {
if (chunk == null) {
chunk = ninePatch.getChunk();
Bridge.setCached9Patch(cacheKey, chunk,
isFramework ? null : context.getProjectKey());
}
if (bitmap == null) {
bitmap = Bitmap_Delegate.createBitmap(ninePatch.getImage(),
false /*isMutable*/,
density);
Bridge.setCachedBitmap(cacheKey, bitmap,
isFramework ? null : context.getProjectKey());
}
}
} catch (MalformedURLException e) {
// URL is wrong, we'll return null below
}
}
if (chunk != null && bitmap != null) {
int[] padding = chunk.getPadding();
Rect paddingRect = new Rect(padding[0], padding[1], padding[2], padding[3]);
return new NinePatchDrawable(context.getResources(), bitmap,
NinePatch_Delegate.serialize(chunk),
paddingRect, null);
}
return null;
}
// ------- TypedValue stuff
// This is taken from //device/libs/utils/ResourceTypes.cpp
private static final class UnitEntry {
String name;
int type;
int unit;
float scale;
UnitEntry(String name, int type, int unit, float scale) {
this.name = name;
this.type = type;
this.unit = unit;
this.scale = scale;
}
}
private final static UnitEntry[] sUnitNames = new UnitEntry[] {
new UnitEntry("px", TypedValue.TYPE_DIMENSION, TypedValue.COMPLEX_UNIT_PX, 1.0f),
new UnitEntry("dip", TypedValue.TYPE_DIMENSION, TypedValue.COMPLEX_UNIT_DIP, 1.0f),
new UnitEntry("dp", TypedValue.TYPE_DIMENSION, TypedValue.COMPLEX_UNIT_DIP, 1.0f),
new UnitEntry("sp", TypedValue.TYPE_DIMENSION, TypedValue.COMPLEX_UNIT_SP, 1.0f),
new UnitEntry("pt", TypedValue.TYPE_DIMENSION, TypedValue.COMPLEX_UNIT_PT, 1.0f),
new UnitEntry("in", TypedValue.TYPE_DIMENSION, TypedValue.COMPLEX_UNIT_IN, 1.0f),
new UnitEntry("mm", TypedValue.TYPE_DIMENSION, TypedValue.COMPLEX_UNIT_MM, 1.0f),
new UnitEntry("%", TypedValue.TYPE_FRACTION, TypedValue.COMPLEX_UNIT_FRACTION, 1.0f/100),
new UnitEntry("%p", TypedValue.TYPE_FRACTION, TypedValue.COMPLEX_UNIT_FRACTION_PARENT, 1.0f/100),
};
/**
* Returns the raw value from the given attribute float-type value string.
* This object is only valid until the next call on to {@link ResourceHelper}.
*/
public static TypedValue getValue(String attribute, String value, boolean requireUnit) {
if (parseFloatAttribute(attribute, value, mValue, requireUnit)) {
return mValue;
}
return null;
}
/**
* Parse a float attribute and return the parsed value into a given TypedValue.
* @param attribute the name of the attribute. Can be null if <var>requireUnit</var> is false.
* @param value the string value of the attribute
* @param outValue the TypedValue to receive the parsed value
* @param requireUnit whether the value is expected to contain a unit.
* @return true if success.
*/
public static boolean parseFloatAttribute(String attribute, @NonNull String value,
TypedValue outValue, boolean requireUnit) {
assert !requireUnit || attribute != null;
// remove the space before and after
value = value.trim();
int len = value.length();
if (len <= 0) {
return false;
}
// check that there's no non ascii characters.
char[] buf = value.toCharArray();
for (int i = 0 ; i < len ; i++) {
if (buf[i] > 255) {
return false;
}
}
// check the first character
if ((buf[0] < '0' || buf[0] > '9') && buf[0] != '.' && buf[0] != '-' && buf[0] != '+') {
return false;
}
// now look for the string that is after the float...
Matcher m = sFloatPattern.matcher(value);
if (m.matches()) {
String f_str = m.group(1);
String end = m.group(2);
float f;
try {
f = Float.parseFloat(f_str);
} catch (NumberFormatException e) {
// this shouldn't happen with the regexp above.
return false;
}
if (end.length() > 0 && end.charAt(0) != ' ') {
// Might be a unit...
if (parseUnit(end, outValue, sFloatOut)) {
computeTypedValue(outValue, f, sFloatOut[0]);
return true;
}
return false;
}
// make sure it's only spaces at the end.
end = end.trim();
if (end.length() == 0) {
if (outValue != null) {
if (!requireUnit) {
outValue.type = TypedValue.TYPE_FLOAT;
outValue.data = Float.floatToIntBits(f);
} else {
// no unit when required? Use dp and out an error.
applyUnit(sUnitNames[1], outValue, sFloatOut);
computeTypedValue(outValue, f, sFloatOut[0]);
Bridge.getLog().error(LayoutLog.TAG_RESOURCES_RESOLVE,
String.format(
"Dimension \"%1$s\" in attribute \"%2$s\" is missing unit!",
value, attribute),
null);
}
return true;
}
}
}
return false;
}
private static void computeTypedValue(TypedValue outValue, float value, float scale) {
value *= scale;
boolean neg = value < 0;
if (neg) {
value = -value;
}
long bits = (long)(value*(1<<23)+.5f);
int radix;
int shift;
if ((bits&0x7fffff) == 0) {
// Always use 23p0 if there is no fraction, just to make
// things easier to read.
radix = TypedValue.COMPLEX_RADIX_23p0;
shift = 23;
} else if ((bits&0xffffffffff800000L) == 0) {
// Magnitude is zero -- can fit in 0 bits of precision.
radix = TypedValue.COMPLEX_RADIX_0p23;
shift = 0;
} else if ((bits&0xffffffff80000000L) == 0) {
// Magnitude can fit in 8 bits of precision.
radix = TypedValue.COMPLEX_RADIX_8p15;
shift = 8;
} else if ((bits&0xffffff8000000000L) == 0) {
// Magnitude can fit in 16 bits of precision.
radix = TypedValue.COMPLEX_RADIX_16p7;
shift = 16;
} else {
// Magnitude needs entire range, so no fractional part.
radix = TypedValue.COMPLEX_RADIX_23p0;
shift = 23;
}
int mantissa = (int)(
(bits>>shift) & TypedValue.COMPLEX_MANTISSA_MASK);
if (neg) {
mantissa = (-mantissa) & TypedValue.COMPLEX_MANTISSA_MASK;
}
outValue.data |=
(radix<<TypedValue.COMPLEX_RADIX_SHIFT)
| (mantissa<<TypedValue.COMPLEX_MANTISSA_SHIFT);
}
private static boolean parseUnit(String str, TypedValue outValue, float[] outScale) {
str = str.trim();
for (UnitEntry unit : sUnitNames) {
if (unit.name.equals(str)) {
applyUnit(unit, outValue, outScale);
return true;
}
}
return false;
}
private static void applyUnit(UnitEntry unit, TypedValue outValue, float[] outScale) {
outValue.type = unit.type;
// COMPLEX_UNIT_SHIFT is 0 and hence intelliJ complains about it. Suppress the warning.
//noinspection PointlessBitwiseExpression
outValue.data = unit.unit << TypedValue.COMPLEX_UNIT_SHIFT;
outScale[0] = unit.scale;
}
}
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