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sdk-common library used by other Android tools libraries.
/*
* Copyright (C) 2015 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.ide.common.vectordrawable;
import com.google.common.collect.ImmutableMap;
import org.w3c.dom.NamedNodeMap;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.geom.Path2D;
import java.awt.geom.Point2D;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Used to represent one VectorDrawble's path element.
*/
class VdPath extends VdElement{
private static Logger logger = Logger.getLogger(VdPath.class.getSimpleName());
private static final String PATH_ID = "android:name";
private static final String PATH_DESCRIPTION = "android:pathData";
private static final String PATH_FILL = "android:fillColor";
private static final String PATH_FILL_OPACTIY = "android:fillAlpha";
private static final String PATH_STROKE = "android:strokeColor";
private static final String PATH_STROKE_OPACTIY = "android:strokeAlpha";
private static final String PATH_STROKE_WIDTH = "android:strokeWidth";
private static final String PATH_TRIM_START = "android:trimPathStart";
private static final String PATH_TRIM_END = "android:trimPathEnd";
private static final String PATH_TRIM_OFFSET = "android:trimPathOffset";
private static final String PATH_STROKE_LINECAP = "android:strokeLineCap";
private static final String PATH_STROKE_LINEJOIN = "android:strokeLineJoin";
private static final String PATH_STROKE_MITERLIMIT = "android:strokeMiterLimit";
private static final String PATH_CLIP = "android:clipToPath";
private static final String LINECAP_BUTT = "butt";
private static final String LINECAP_ROUND = "round";
private static final String LINECAP_SQUARE = "square";
private static final String LINEJOIN_MITER = "miter";
private static final String LINEJOIN_ROUND = "round";
private static final String LINEJOIN_BEVEL = "bevel";
private Node[] mNodeList = null;
private int mStrokeColor = 0;
private int mFillColor = 0;
private float mStrokeWidth = 0;
private int mStrokeLineCap = 0;
private int mStrokeLineJoin = 0;
private float mStrokeMiterlimit = 4;
private float mStrokeAlpha = 1.0f;
private float mFillAlpha = 1.0f;
// TODO: support trim path.
private float mTrimPathStart = 0;
private float mTrimPathEnd = 1;
private float mTrimPathOffset = 0;
public void toPath(Path2D path) {
path.reset();
if (mNodeList != null) {
VdNodeRender.creatPath(mNodeList, path);
}
}
/**
* Represent one segment of the path data. Like "l 0,0 1,1"
*/
public static class Node {
private char mType;
private float[] mParams;
public char getType() {
return mType;
}
public float[] getmParams() {
return mParams;
}
public Node(char type, float[] params) {
this.mType = type;
this.mParams = params;
}
public Node(Node n) {
this.mType = n.mType;
this.mParams = Arrays.copyOf(n.mParams, n.mParams.length);
}
public static boolean hasRelMoveAfterClose(Node[] nodes) {
char preType = ' ';
for (Node n : nodes) {
if ((preType == 'z' || preType == 'Z') && n.mType == 'm') {
return true;
}
preType = n.mType;
}
return false;
}
public static String NodeListToString(Node[] nodes, String decimalPlaceString) {
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < nodes.length; i++) {
Node n = nodes[i];
stringBuilder.append(n.mType);
int len = n.mParams.length;
boolean implicitLineTo = false;
char lineToType = ' ';
if ((n.mType == 'm' || n.mType == 'M') && len > 2) {
implicitLineTo = true;
lineToType = n.mType == 'm' ? 'l' : 'L';
}
for (int j = 0; j < len; j++) {
if (j > 0) {
stringBuilder.append(((j & 1) == 1) ? "," : " ");
}
if (implicitLineTo && j == 2) {
stringBuilder.append(lineToType);
}
// To avoid trailing zeros like 17.0, use this trick
float value = n.mParams[j];
if (value == (long) value) {
stringBuilder.append(String.valueOf((long) value));
} else {
DecimalFormatSymbols fractionSeparator = new DecimalFormatSymbols();
fractionSeparator.setDecimalSeparator('.');
DecimalFormat df = new DecimalFormat(decimalPlaceString, fractionSeparator);
df.setRoundingMode(RoundingMode.HALF_UP);
stringBuilder.append(df.format(value));
}
}
}
return stringBuilder.toString();
}
private static final char INIT_TYPE = ' ';
public static void transform(AffineTransform totalTransform,
Node[] nodes) {
Point2D.Float currentPoint = new Point2D.Float();
Point2D.Float currentSegmentStartPoint = new Point2D.Float();
char previousType = INIT_TYPE;
for (int i = 0; i < nodes.length; i++) {
nodes[i].transform(totalTransform, currentPoint, currentSegmentStartPoint, previousType);
previousType= nodes[i].mType;
}
}
private static final ImmutableMap commandStepMap =
ImmutableMap.builder()
.put('z', 2)
.put('Z', 2)
.put('m', 2)
.put('M', 2)
.put('l', 2)
.put('L', 2)
.put('t', 2)
.put('T', 2)
.put('h', 1)
.put('H', 1)
.put('v', 1)
.put('V', 1)
.put('c', 6)
.put('C', 6)
.put('s', 4)
.put('S', 4)
.put('q', 4)
.put('Q', 4)
.put('a', 7)
.put('A', 7)
.build();
private void transform(AffineTransform totalTransform, Point2D.Float currentPoint,
Point2D.Float currentSegmentStartPoint, char previousType) {
// For Horizontal / Vertical lines, we have to convert to LineTo with 2 parameters
// And for arcTo, we also need to isolate the parameters for transformation.
// Therefore a looping will be necessary for such commands.
//
// Note that if the matrix is translation only, then we can save many computations.
int paramsLen = mParams.length;
float[] tempParams = new float[2 * paramsLen];
// These has to be pre-transformed value. In another word, the same as it is
// in the pathData.
float currentX = currentPoint.x;
float currentY = currentPoint.y;
float currentSegmentStartX = currentSegmentStartPoint.x;
float currentSegmentStartY = currentSegmentStartPoint.y;
int step = commandStepMap.get(mType);
switch (mType) {
case 'z':
case 'Z':
currentX = currentSegmentStartX;
currentY = currentSegmentStartY;
break;
case 'M':
case 'L':
case 'T':
case 'C':
case 'S':
case 'Q':
currentX = mParams[paramsLen - 2];
currentY = mParams[paramsLen - 1];
if (mType == 'M') {
currentSegmentStartX = currentX;
currentSegmentStartY = currentY;
}
totalTransform.transform(mParams, 0, mParams, 0, paramsLen / 2);
break;
case 'm':
// We also need to workaround a bug in API 21 that 'm' after 'z'
// is not picking up the relative value correctly.
if (previousType == 'z' || previousType == 'Z') {
mType = 'M';
mParams[0] += currentSegmentStartX;
mParams[1] += currentSegmentStartY;
currentSegmentStartX = mParams[0];
currentSegmentStartY = mParams[1];
for (int i = 1; i < paramsLen / step; i++) {
mParams[i * step + 0] += mParams[(i - 1) * step + 0];
mParams[i * step + 1] += mParams[(i - 1) * step + 1];
}
currentX = mParams[paramsLen - 2];
currentY = mParams[paramsLen - 1];
totalTransform.transform(mParams, 0, mParams, 0, paramsLen / 2);
} else {
// We need to handle the initial 'm' similar to 'M' for first pair.
// Then all the following numbers are handled as 'l'
int startIndex = 0;
if (previousType == INIT_TYPE) {
int paramsLenInitialM = 2;
currentX = mParams[paramsLenInitialM - 2];
currentY = mParams[paramsLenInitialM - 1];
currentSegmentStartX = currentX;
currentSegmentStartY = currentY;
totalTransform.transform(mParams, 0, mParams, 0, paramsLenInitialM / 2);
startIndex = 1;
}
for (int i = startIndex; i < paramsLen / step; i++) {
int indexX = i * step + (step - 2);
int indexY = i * step + (step - 1);
currentX += mParams[indexX];
currentY += mParams[indexY];
}
if (!isTranslationOnly(totalTransform)) {
deltaTransform(totalTransform, mParams, 2 * startIndex,
paramsLen - 2 * startIndex);
}
}
break;
case 'l':
case 't':
case 'c':
case 's':
case 'q':
for (int i = 0; i < paramsLen / step; i ++) {
int indexX = i * step + (step - 2);
int indexY = i * step + (step - 1);
currentX += mParams[indexX];
currentY += mParams[indexY];
}
if (!isTranslationOnly(totalTransform)) {
deltaTransform(totalTransform, mParams, 0, paramsLen);
}
break;
case 'H':
mType = 'L';
for (int i = 0; i < paramsLen; i ++) {
tempParams[i * 2 + 0] = mParams[i];
tempParams[i * 2 + 1] = currentY;
currentX = mParams[i];
}
totalTransform.transform(tempParams, 0, tempParams, 0, paramsLen /*points*/);
mParams = tempParams;
break;
case 'V':
mType = 'L';
for (int i = 0; i < paramsLen; i ++) {
tempParams[i * 2 + 0] = currentX;
tempParams[i * 2 + 1] = mParams[i];
currentY = mParams[i];
}
totalTransform.transform(tempParams, 0, tempParams, 0, paramsLen /*points*/);
mParams = tempParams;
break;
case 'h':
for (int i = 0; i < paramsLen; i ++) {
// tempParams may not be used, but I would rather merge the code here.
tempParams[i * 2 + 0] = mParams[i];
currentX += mParams[i];
tempParams[i * 2 + 1] = 0;
}
if (!isTranslationOnly(totalTransform)) {
mType = 'l';
deltaTransform(totalTransform, tempParams, 0, 2 * paramsLen);
mParams = tempParams;
}
break;
case 'v':
for (int i = 0; i < paramsLen; i++) {
// tempParams may not be used, but I would rather merge the code here.
tempParams[i * 2 + 0] = 0;
tempParams[i * 2 + 1] = mParams[i];
currentY += mParams[i];
}
if (!isTranslationOnly(totalTransform)) {
mType = 'l';
deltaTransform(totalTransform, tempParams, 0, 2 * paramsLen);
mParams = tempParams;
}
break;
case 'A':
for (int i = 0; i < paramsLen / step; i ++) {
// (0:rx 1:ry 2:x-axis-rotation 3:large-arc-flag 4:sweep-flag 5:x 6:y)
// [0, 1, 2]
if (!isTranslationOnly(totalTransform)) {
EllipseSolver ellipseSolver = new EllipseSolver(totalTransform,
currentX, currentY,
mParams[i * step + 0], mParams[i * step + 1], mParams[i * step + 2],
mParams[i * step + 3], mParams[i * step + 4],
mParams[i * step + 5], mParams[i * step + 6]);
mParams[i * step + 0] = ellipseSolver.getMajorAxis();
mParams[i * step + 1] = ellipseSolver.getMinorAxis();
mParams[i * step + 2] = ellipseSolver.getRotationDegree();
if (ellipseSolver.getDirectionChanged()) {
mParams[i * step + 4] = 1 - mParams[i * step + 4];
}
} else {
// No need to change the value of rx , ry, rotation, and flags.
}
// [5, 6]
currentX = mParams[i * step + 5];
currentY = mParams[i * step + 6];
totalTransform.transform(mParams, i * step + 5, mParams, i * step + 5, 1 /*1 point only*/);
}
break;
case 'a':
for (int i = 0; i < paramsLen / step; i ++) {
float oldCurrentX = currentX;
float oldCurrentY = currentY;
currentX += mParams[i * step + 5];
currentY += mParams[i * step + 6];
if (!isTranslationOnly(totalTransform)) {
EllipseSolver ellipseSolver = new EllipseSolver(totalTransform,
oldCurrentX, oldCurrentY,
mParams[i * step + 0], mParams[i * step + 1], mParams[i * step + 2],
mParams[i * step + 3], mParams[i * step + 4],
oldCurrentX + mParams[i * step + 5],
oldCurrentY + mParams[i * step + 6]);
// (0:rx 1:ry 2:x-axis-rotation 3:large-arc-flag 4:sweep-flag 5:x 6:y)
// [5, 6]
deltaTransform(totalTransform, mParams, i * step + 5, 2);
// [0, 1, 2]
mParams[i * step + 0] = ellipseSolver.getMajorAxis();
mParams[i * step + 1] = ellipseSolver.getMinorAxis();
mParams[i * step + 2] = ellipseSolver.getRotationDegree();
if (ellipseSolver.getDirectionChanged()) {
mParams[i * step + 4] = 1 - mParams[i * step + 4];
}
}
}
break;
default:
throw new IllegalArgumentException("Type is not right!!!");
}
currentPoint.setLocation(currentX, currentY);
currentSegmentStartPoint.setLocation(currentSegmentStartX, currentSegmentStartY);
return;
}
private boolean isTranslationOnly(AffineTransform totalTransform) {
int type = totalTransform.getType();
if (type == AffineTransform.TYPE_IDENTITY || type == AffineTransform.TYPE_TRANSLATION) {
return true;
}
return false;
}
/**
* Convert the tempParams into a double array, then apply the
* delta transform and convert it back to float array.
* @params: offset in number of floats, not points.
* @params: paramsLen in number of floats, not points.
*/
private void deltaTransform(AffineTransform totalTransform, float[] tempParams, int offset, int paramsLen) {
double[] doubleArray = new double[paramsLen];
for (int i = 0; i < paramsLen; i++)
{
doubleArray[i] = (double) tempParams[i + offset];
}
totalTransform.deltaTransform(doubleArray, 0, doubleArray, 0, paramsLen / 2);
for (int i = 0; i < paramsLen; i++)
{
tempParams[i + offset] = (float) doubleArray[i];
}
}
}
/**
* @return color value in #AARRGGBB format.
*/
private int calculateColor(String value) {
int len = value.length();
int ret;
int k = 0;
switch (len) {
case 7: // #RRGGBB
ret = (int) Long.parseLong(value.substring(1), 16);
ret |= 0xFF000000;
break;
case 9: // #AARRGGBB
ret = (int) Long.parseLong(value.substring(1), 16);
break;
case 4: // #RGB
ret = (int) Long.parseLong(value.substring(1), 16);
k |= ((ret >> 8) & 0xF) * 0x110000;
k |= ((ret >> 4) & 0xF) * 0x1100;
k |= ((ret) & 0xF) * 0x11;
ret = k | 0xFF000000;
break;
case 5: // #ARGB
ret = (int) Long.parseLong(value.substring(1), 16);
k |= ((ret >> 12) & 0xF) * 0x11000000;
k |= ((ret >> 8) & 0xF) * 0x110000;
k |= ((ret >> 4) & 0xF) * 0x1100;
k |= ((ret) & 0xF) * 0x11;
ret = k;
break;
default:
return 0xFF000000;
}
return ret;
}
private void setNameValue(String name, String value) {
if (PATH_DESCRIPTION.equals(name)) {
mNodeList = PathParser.parsePath(value);
} else if (PATH_ID.equals(name)) {
mName = value;
} else if (PATH_FILL.equals(name)) {
mFillColor = calculateColor(value);
} else if (PATH_STROKE.equals(name)) {
mStrokeColor = calculateColor(value);
} else if (PATH_FILL_OPACTIY.equals(name)) {
mFillAlpha = Float.parseFloat(value);
} else if (PATH_STROKE_OPACTIY.equals(name)) {
mStrokeAlpha = Float.parseFloat(value);
} else if (PATH_STROKE_WIDTH.equals(name)) {
mStrokeWidth = Float.parseFloat(value);
} else if (PATH_TRIM_START.equals(name)) {
mTrimPathStart = Float.parseFloat(value);
} else if (PATH_TRIM_END.equals(name)) {
mTrimPathEnd = Float.parseFloat(value);
} else if (PATH_TRIM_OFFSET.equals(name)) {
mTrimPathOffset = Float.parseFloat(value);
} else if (PATH_STROKE_LINECAP.equals(name)) {
if (LINECAP_BUTT.equals(value)) {
mStrokeLineCap = 0;
} else if (LINECAP_ROUND.equals(value)) {
mStrokeLineCap = 1;
} else if (LINECAP_SQUARE.equals(value)) {
mStrokeLineCap = 2;
}
} else if (PATH_STROKE_LINEJOIN.equals(name)) {
if (LINEJOIN_MITER.equals(value)) {
mStrokeLineJoin = 0;
} else if (LINEJOIN_ROUND.equals(value)) {
mStrokeLineJoin = 1;
} else if (LINEJOIN_BEVEL.equals(value)) {
mStrokeLineJoin = 2;
}
} else if (PATH_STROKE_MITERLIMIT.equals(name)) {
mStrokeMiterlimit = Float.parseFloat(value);
} else {
logger.log(Level.WARNING, ">>>>>> DID NOT UNDERSTAND ! \"" + name + "\" <<<<");
}
}
/**
* Multiply the alpha value into the alpha channel color.
*/
private static int applyAlpha(int color, float alpha) {
int alphaBytes = (color >> 24) & 0xff;
color &= 0x00FFFFFF;
color |= ((int) (alphaBytes * alpha)) << 24;
return color;
}
/**
* Draw the current path
*/
@Override
public void draw(Graphics2D g, AffineTransform currentMatrix, float scaleX, float scaleY) {
Path2D path2d = new Path2D.Double();
toPath(path2d);
// SWing operate the matrix is using pre-concatenate by default.
// Below is how this is handled in Android framework.
// pathMatrix.set(groupStackedMatrix);
// pathMatrix.postScale(scaleX, scaleY);
g.setTransform(new AffineTransform());
g.scale(scaleX, scaleY);
g.transform(currentMatrix);
// TODO: support clip path here.
if (mFillColor != 0) {
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
Color fillColor = new Color(applyAlpha(mFillColor, mFillAlpha), true);
g.setColor(fillColor);
g.fill(path2d);
}
if (mStrokeColor != 0) {
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
BasicStroke stroke = new BasicStroke(mStrokeWidth, mStrokeLineCap, mStrokeLineJoin, mStrokeMiterlimit);
g.setStroke(stroke);
Color strokeColor = new Color(applyAlpha(mStrokeColor, mStrokeAlpha), true);
g.setColor(strokeColor);
g.draw(path2d);
}
return;
}
@Override
public void parseAttributes(NamedNodeMap attributes) {
int len = attributes.getLength();
for (int i = 0; i < len; i++) {
String name = attributes.item(i).getNodeName();
String value = attributes.item(i).getNodeValue();
setNameValue(name, value);
}
}
@Override
public boolean isGroup() {
return false;
}
@Override
public String toString() {
StringBuilder pathInfo = new StringBuilder();
pathInfo.append("Path:");
pathInfo.append(" Name: " + mName);
pathInfo.append(" Node: " + mNodeList.toString());
pathInfo.append(" mFillColor: " + Integer.toHexString(mFillColor));
pathInfo.append(" mFillAlpha:" + mFillAlpha);
pathInfo.append(" mStrokeColor:" + Integer.toHexString(mStrokeColor));
pathInfo.append(" mStrokeWidth:" + mStrokeWidth);
pathInfo.append(" mStrokeAlpha:" + mStrokeAlpha);
return pathInfo.toString();
}
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