/*
* 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;
import com.android.internal.util.XmlUtils;
import com.android.layoutlib.api.IResourceValue;
import com.android.layoutlib.api.IStyleResourceValue;
import org.kxml2.io.KXmlParser;
import org.xmlpull.v1.XmlPullParser;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.ViewGroup.LayoutParams;
import java.io.File;
import java.io.FileReader;
import java.util.Map;
/**
* TODO: describe.
*/
public final class BridgeTypedArray extends TypedArray {
@SuppressWarnings("hiding")
private BridgeResources mResources;
private BridgeContext mContext;
@SuppressWarnings("hiding")
private IResourceValue[] mData;
private String[] mNames;
private final boolean mPlatformFile;
public BridgeTypedArray(BridgeResources resources, BridgeContext context, int len,
boolean platformFile) {
super(null, null, null, 0);
mResources = resources;
mContext = context;
mPlatformFile = platformFile;
mData = new IResourceValue[len];
mNames = new String[len];
}
/** A bridge-specific method that sets a value in the type array */
public void bridgeSetValue(int index, String name, IResourceValue value) {
mData[index] = value;
mNames[index] = name;
}
/**
* Seals the array after all calls to {@link #bridgeSetValue(int, String, IResourceValue)} have
* been done.
* <p/>This allows to compute the list of non default values, permitting
* {@link #getIndexCount()} to return the proper value.
*/
public void sealArray() {
// fills TypedArray.mIndices which is used to implement getIndexCount/getIndexAt
// first count the array size
int count = 0;
for (IResourceValue data : mData) {
if (data != null) {
count++;
}
}
// allocate the table with an extra to store the size
mIndices = new int[count+1];
mIndices[0] = count;
// fill the array with the indices.
int index = 1;
for (int i = 0 ; i < mData.length ; i++) {
if (mData[i] != null) {
mIndices[index++] = i;
}
}
}
/**
* Return the number of values in this array.
*/
@Override
public int length() {
return mData.length;
}
/**
* Return the Resources object this array was loaded from.
*/
@Override
public Resources getResources() {
return mResources;
}
/**
* Retrieve the styled string value for the attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
*
* @return CharSequence holding string data. May be styled. Returns
* null if the attribute is not defined.
*/
@Override
public CharSequence getText(int index) {
if (mData[index] != null) {
// FIXME: handle styled strings!
return mData[index].getValue();
}
return null;
}
/**
* Retrieve the string value for the attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
*
* @return String holding string data. Any styling information is
* removed. Returns null if the attribute is not defined.
*/
@Override
public String getString(int index) {
if (mData[index] != null) {
return mData[index].getValue();
}
return null;
}
/**
* Retrieve the boolean value for the attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
* @param defValue Value to return if the attribute is not defined.
*
* @return Attribute boolean value, or defValue if not defined.
*/
@Override
public boolean getBoolean(int index, boolean defValue) {
if (mData[index] == null) {
return defValue;
}
String s = mData[index].getValue();
if (s != null) {
return XmlUtils.convertValueToBoolean(s, defValue);
}
return defValue;
}
/**
* Retrieve the integer value for the attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
* @param defValue Value to return if the attribute is not defined.
*
* @return Attribute int value, or defValue if not defined.
*/
@Override
public int getInt(int index, int defValue) {
if (mData[index] == null) {
return defValue;
}
String s = mData[index].getValue();
try {
return (s == null) ? defValue : XmlUtils.convertValueToInt(s, defValue);
} catch (NumberFormatException e) {
// pass
}
// Field is not null and is not an integer.
// Check for possible constants and try to find them.
// Get the map of attribute-constant -> IntegerValue
Map<String, Integer> map = Bridge.getEnumValues(mNames[index]);
if (map != null) {
// accumulator to store the value of the 1+ constants.
int result = 0;
// split the value in case this is a mix of several flags.
String[] keywords = s.split("\\|");
for (String keyword : keywords) {
Integer i = map.get(keyword.trim());
if (i != null) {
result |= i.intValue();
} else {
mContext.getLogger().warning(String.format(
"Unknown constant \"%s\" in attribute \"%2$s\"",
keyword, mNames[index]));
}
}
return result;
}
return defValue;
}
/**
* Retrieve the float value for the attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
*
* @return Attribute float value, or defValue if not defined..
*/
@Override
public float getFloat(int index, float defValue) {
if (mData[index] == null) {
return defValue;
}
String s = mData[index].getValue();
if (s != null) {
try {
return Float.parseFloat(s);
} catch (NumberFormatException e) {
mContext.getLogger().warning(String.format(
"Unable to convert \"%s\" into a float in attribute \"%2$s\"",
s, mNames[index]));
// we'll return the default value below.
}
}
return defValue;
}
/**
* Retrieve the color value for the attribute at <var>index</var>. If
* the attribute references a color resource holding a complex
* {@link android.content.res.ColorStateList}, then the default color from
* the set is returned.
*
* @param index Index of attribute to retrieve.
* @param defValue Value to return if the attribute is not defined or
* not a resource.
*
* @return Attribute color value, or defValue if not defined.
*/
@Override
public int getColor(int index, int defValue) {
if (mData[index] == null) {
return defValue;
}
String s = mData[index].getValue();
try {
return ResourceHelper.getColor(s);
} catch (NumberFormatException e) {
mContext.getLogger().warning(String.format(
"Unable to convert \"%s\" into a color in attribute \"%2$s\"",
s, mNames[index]));
// we'll return the default value below.
}
return defValue;
}
/**
* Retrieve the ColorStateList for the attribute at <var>index</var>.
* The value may be either a single solid color or a reference to
* a color or complex {@link android.content.res.ColorStateList} description.
*
* @param index Index of attribute to retrieve.
*
* @return ColorStateList for the attribute, or null if not defined.
*/
@Override
public ColorStateList getColorStateList(int index) {
if (mData[index] == null) {
return null;
}
String value = mData[index].getValue();
if (value == null) {
return null;
}
try {
int color = ResourceHelper.getColor(value);
return ColorStateList.valueOf(color);
} catch (NumberFormatException e) {
// if it's not a color value, we'll attempt to read the xml based color below.
}
// let the framework inflate the ColorStateList from the XML file.
try {
File f = new File(value);
if (f.isFile()) {
KXmlParser parser = new KXmlParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
parser.setInput(new FileReader(f));
ColorStateList colorStateList = ColorStateList.createFromXml(
mContext.getResources(),
// FIXME: we need to know if this resource is platform or not
new BridgeXmlBlockParser(parser, mContext, false));
return colorStateList;
}
} catch (Exception e) {
// this is an error and not warning since the file existence is checked before
// attempting to parse it.
mContext.getLogger().error(e);
// return null below.
}
// looks like were unable to resolve the color value.
mContext.getLogger().warning(String.format(
"Unable to resolve color value \"%1$s\" in attribute \"%2$s\"",
value, mNames[index]));
return null;
}
/**
* Retrieve the integer value for the attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
* @param defValue Value to return if the attribute is not defined or
* not a resource.
*
* @return Attribute integer value, or defValue if not defined.
*/
@Override
public int getInteger(int index, int defValue) {
if (mData[index] == null) {
return defValue;
}
String s = mData[index].getValue();
if (s != null) {
try {
return Integer.parseInt(s);
} catch (NumberFormatException e) {
mContext.getLogger().warning(String.format(
"Unable to convert \"%s\" into a integer in attribute \"%2$s\"",
s, mNames[index]));
// The default value is returned below.
}
}
return defValue;
}
/**
* Retrieve a dimensional unit attribute at <var>index</var>. Unit
* conversions are based on the current {@link DisplayMetrics}
* associated with the resources this {@link TypedArray} object
* came from.
*
* @param index Index of attribute to retrieve.
* @param defValue Value to return if the attribute is not defined or
* not a resource.
*
* @return Attribute dimension value multiplied by the appropriate
* metric, or defValue if not defined.
*
* @see #getDimensionPixelOffset
* @see #getDimensionPixelSize
*/
@Override
public float getDimension(int index, float defValue) {
if (mData[index] == null) {
return defValue;
}
String s = mData[index].getValue();
if (s == null) {
return defValue;
} else if (s.equals(BridgeConstants.FILL_PARENT)) {
return LayoutParams.FILL_PARENT;
} else if (s.equals(BridgeConstants.WRAP_CONTENT)) {
return LayoutParams.WRAP_CONTENT;
}
if (ResourceHelper.stringToFloat(s, mValue)) {
return mValue.getDimension(mResources.mMetrics);
}
// looks like we were unable to resolve the dimension value
mContext.getLogger().warning(String.format(
"Unable to resolve dimension value \"%1$s\" in attribute \"%2$s\"",
s, mNames[index]));
return defValue;
}
/**
* Retrieve a dimensional unit attribute at <var>index</var> for use
* as an offset in raw pixels. This is the same as
* {@link #getDimension}, except the returned value is converted to
* integer pixels for you. An offset conversion involves simply
* truncating the base value to an integer.
*
* @param index Index of attribute to retrieve.
* @param defValue Value to return if the attribute is not defined or
* not a resource.
*
* @return Attribute dimension value multiplied by the appropriate
* metric and truncated to integer pixels, or defValue if not defined.
*
* @see #getDimension
* @see #getDimensionPixelSize
*/
@Override
public int getDimensionPixelOffset(int index, int defValue) {
return (int) getDimension(index, defValue);
}
/**
* Retrieve a dimensional unit attribute at <var>index</var> for use
* as a size in raw pixels. This is the same as
* {@link #getDimension}, except the returned value is converted to
* integer pixels for use as a size. A size conversion involves
* rounding the base value, and ensuring that a non-zero base value
* is at least one pixel in size.
*
* @param index Index of attribute to retrieve.
* @param defValue Value to return if the attribute is not defined or
* not a resource.
*
* @return Attribute dimension value multiplied by the appropriate
* metric and truncated to integer pixels, or defValue if not defined.
*
* @see #getDimension
* @see #getDimensionPixelOffset
*/
@Override
public int getDimensionPixelSize(int index, int defValue) {
if (mData[index] == null) {
return defValue;
}
String s = mData[index].getValue();
if (s == null) {
return defValue;
} else if (s.equals(BridgeConstants.FILL_PARENT)) {
return LayoutParams.FILL_PARENT;
} else if (s.equals(BridgeConstants.WRAP_CONTENT)) {
return LayoutParams.WRAP_CONTENT;
}
// FIXME huh?
float f = getDimension(index, defValue);
final int res = (int)(f+0.5f);
if (res != 0) return res;
if (f == 0) return 0;
if (f > 0) return 1;
throw new UnsupportedOperationException("Can't convert to dimension: " +
Integer.toString(index));
}
/**
* Special version of {@link #getDimensionPixelSize} for retrieving
* {@link android.view.ViewGroup}'s layout_width and layout_height
* attributes. This is only here for performance reasons; applications
* should use {@link #getDimensionPixelSize}.
*
* @param index Index of the attribute to retrieve.
* @param name Textual name of attribute for error reporting.
*
* @return Attribute dimension value multiplied by the appropriate
* metric and truncated to integer pixels.
*/
@Override
public int getLayoutDimension(int index, String name) {
return getDimensionPixelSize(index, 0);
}
/**
* Retrieve a fractional unit attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
* @param base The base value of this fraction. In other words, a
* standard fraction is multiplied by this value.
* @param pbase The parent base value of this fraction. In other
* words, a parent fraction (nn%p) is multiplied by this
* value.
* @param defValue Value to return if the attribute is not defined or
* not a resource.
*
* @return Attribute fractional value multiplied by the appropriate
* base value, or defValue if not defined.
*/
@Override
public float getFraction(int index, int base, int pbase, float defValue) {
if (mData[index] == null) {
return defValue;
}
String value = mData[index].getValue();
if (value == null) {
return defValue;
}
if (ResourceHelper.stringToFloat(value, mValue)) {
return mValue.getFraction(base, pbase);
}
// looks like we were unable to resolve the fraction value
mContext.getLogger().warning(String.format(
"Unable to resolve fraction value \"%1$s\" in attribute \"%2$s\"",
value, mNames[index]));
return defValue;
}
/**
* Retrieve the resource identifier for the attribute at
* <var>index</var>. Note that attribute resource as resolved when
* the overall {@link TypedArray} object is retrieved. As a
* result, this function will return the resource identifier of the
* final resource value that was found, <em>not</em> necessarily the
* original resource that was specified by the attribute.
*
* @param index Index of attribute to retrieve.
* @param defValue Value to return if the attribute is not defined or
* not a resource.
*
* @return Attribute resource identifier, or defValue if not defined.
*/
@Override
public int getResourceId(int index, int defValue) {
// get the IResource for this index
IResourceValue resValue = mData[index];
// no data, return the default value.
if (resValue == null) {
return defValue;
}
// check if this is a style resource
if (resValue instanceof IStyleResourceValue) {
// get the id that will represent this style.
return mContext.getDynamicIdByStyle((IStyleResourceValue)resValue);
}
// if the attribute was a reference to an id, and not a declaration of an id (@+id), then
// the xml attribute value was "resolved" which leads us to a IResourceValue with
// getType() returning "id" and getName() returning the id name
// (and getValue() returning null!). We need to handle this!
if (resValue.getType() != null && resValue.getType().equals(BridgeConstants.RES_ID)) {
// if this is a framework id
if (mPlatformFile || resValue.isFramework()) {
// look for idName in the android R classes
return mContext.getFrameworkIdValue(resValue.getName(), defValue);
}
// look for idName in the project R class.
return mContext.getProjectIdValue(resValue.getName(), defValue);
}
// else, try to get the value, and resolve it somehow.
String value = resValue.getValue();
if (value == null) {
return defValue;
}
// if the value is just an integer, return it.
try {
int i = Integer.parseInt(value);
if (Integer.toString(i).equals(value)) {
return i;
}
} catch (NumberFormatException e) {
// pass
}
// Handle the @id/<name>, @+id/<name> and @android:id/<name>
// We need to return the exact value that was compiled (from the various R classes),
// as these values can be reused internally with calls to findViewById().
// There's a trick with platform layouts that not use "android:" but their IDs are in
// fact in the android.R and com.android.internal.R classes.
// The field mPlatformFile will indicate that all IDs are to be looked up in the android R
// classes exclusively.
// if this is a reference to an id, find it.
if (value.startsWith("@id/") || value.startsWith("@+") ||
value.startsWith("@android:id/")) {
int pos = value.indexOf('/');
String idName = value.substring(pos + 1);
// if this is a framework id
if (mPlatformFile || value.startsWith("@android") || value.startsWith("@+android")) {
// look for idName in the android R classes
return mContext.getFrameworkIdValue(idName, defValue);
}
// look for idName in the project R class.
return mContext.getProjectIdValue(idName, defValue);
}
// not a direct id valid reference? resolve it
Integer idValue = null;
if (resValue.isFramework()) {
idValue = Bridge.getResourceValue(resValue.getType(), resValue.getName());
} else {
idValue = mContext.getProjectCallback().getResourceValue(
resValue.getType(), resValue.getName());
}
if (idValue != null) {
return idValue.intValue();
}
mContext.getLogger().warning(String.format(
"Unable to resolve id \"%1$s\" for attribute \"%2$s\"", value, mNames[index]));
return defValue;
}
/**
* Retrieve the Drawable for the attribute at <var>index</var>. This
* gets the resource ID of the selected attribute, and uses
* {@link Resources#getDrawable Resources.getDrawable} of the owning
* Resources object to retrieve its Drawable.
*
* @param index Index of attribute to retrieve.
*
* @return Drawable for the attribute, or null if not defined.
*/
@Override
public Drawable getDrawable(int index) {
if (mData[index] == null) {
return null;
}
String value = mData[index].getValue();
if (value == null || BridgeConstants.REFERENCE_NULL.equals(value)) {
return null;
}
Drawable d = ResourceHelper.getDrawable(value, mContext, mData[index].isFramework());
if (d != null) {
return d;
}
// looks like we were unable to resolve the drawable
mContext.getLogger().warning(String.format(
"Unable to resolve drawable \"%1$s\" in attribute \"%2$s\"", value, mNames[index]));
return null;
}
/**
* Retrieve the CharSequence[] for the attribute at <var>index</var>.
* This gets the resource ID of the selected attribute, and uses
* {@link Resources#getTextArray Resources.getTextArray} of the owning
* Resources object to retrieve its String[].
*
* @param index Index of attribute to retrieve.
*
* @return CharSequence[] for the attribute, or null if not defined.
*/
@Override
public CharSequence[] getTextArray(int index) {
if (mData[index] == null) {
return null;
}
String value = mData[index].getValue();
if (value != null) {
return new CharSequence[] { value };
}
mContext.getLogger().warning(String.format(
String.format("Unknown value for getTextArray(%d) => %s", //DEBUG
index, mData[index].getName())));
return null;
}
/**
* Retrieve the raw TypedValue for the attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
* @param outValue TypedValue object in which to place the attribute's
* data.
*
* @return Returns true if the value was retrieved, else false.
*/
@Override
public boolean getValue(int index, TypedValue outValue) {
if (mData[index] == null) {
return false;
}
String s = mData[index].getValue();
return ResourceHelper.stringToFloat(s, outValue);
}
/**
* Determines whether there is an attribute at <var>index</var>.
*
* @param index Index of attribute to retrieve.
*
* @return True if the attribute has a value, false otherwise.
*/
@Override
public boolean hasValue(int index) {
return mData[index] != null;
}
/**
* Retrieve the raw TypedValue for the attribute at <var>index</var>
* and return a temporary object holding its data. This object is only
* valid until the next call on to {@link TypedArray}.
*
* @param index Index of attribute to retrieve.
*
* @return Returns a TypedValue object if the attribute is defined,
* containing its data; otherwise returns null. (You will not
* receive a TypedValue whose type is TYPE_NULL.)
*/
@Override
public TypedValue peekValue(int index) {
if (getValue(index, mValue)) {
return mValue;
}
return null;
}
/**
* Returns a message about the parser state suitable for printing error messages.
*/
@Override
public String getPositionDescription() {
return "<internal -- stub if needed>";
}
/**
* Give back a previously retrieved StyledAttributes, for later re-use.
*/
@Override
public void recycle() {
// pass
}
@Override
public boolean getValueAt(int index, TypedValue outValue) {
// pass
return false;
}
@Override
public String toString() {
return mData.toString();
}
}
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