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/*
* Copyright (c) 2011, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package javafx.css;
import javafx.collections.ListChangeListener.Change;
import javafx.collections.ObservableList;
import javafx.scene.Node;
import com.sun.javafx.collections.TrackableObservableList;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
/**
* A Rule is a collection of CSS {@code Selector}s and {@code Declaration}s.
*
* @since 9
*/
final public class Rule {
private List selectors = null;
/**
* The list returned from this method should be treated as unmodifiable.
* Tools should use {@link #getSelectors()} which tracks adds and removes.
*/
List getUnobservedSelectorList() {
if (selectors == null) {
selectors = new ArrayList<>();
}
return selectors;
}
private List declarations = null;
/**
* The list returned from this method should be treated as unmodifiable.
* Tools should use {@link #getDeclarations()} which tracks adds and removes.
*/
List getUnobservedDeclarationList() {
if (declarations == null && serializedDecls != null) {
try {
ByteArrayInputStream bis = new ByteArrayInputStream(serializedDecls);
DataInputStream dis = new DataInputStream(bis);
short nDeclarations = dis.readShort();
declarations = new ArrayList<>(nDeclarations);
for (int i = 0; i < nDeclarations; i++) {
Declaration decl = Declaration.readBinary(bssVersion, dis, stylesheet.getStringStore());
decl.rule = Rule.this;
if (stylesheet != null && stylesheet.getUrl() != null) {
String stylesheetUrl = stylesheet.getUrl();
decl.fixUrl(stylesheetUrl);
}
declarations.add(decl);
}
} catch (IOException ioe) {
declarations = new ArrayList<>();
assert false; ioe.getMessage();
} finally {
serializedDecls = null;
}
}
return declarations;
}
private Observables observables = null;
/**
* This method is to support tooling that may want to add declarations to
* or remove declarations from a Rule. Changes to the list are tracked
* so that added declarations are tagged as belonging to this rule, and
* the rule for removed declarations is nulled out.
* @return a observable list of declarations
*/
public final ObservableList getDeclarations() {
if (observables == null) {
observables = new Observables(this);
}
return observables.getDeclarations();
}
/**
* This method is to support tooling that may want to add selectors to
* or remove selectors from a Rule. Changes to the list are tracked
* so that added selectors are tagged as belonging to this rule, and
* the rule for removed selectors is nulled out.
* @return an observable list of selectors
*/
public final ObservableList getSelectors() {
if (observables == null) {
observables = new Observables(this);
}
return observables.getSelectors();
}
private Stylesheet stylesheet;
/**
* Gets the {@code Stylesheet} this {@code Rule} belongs to.
* @return the stylesheet
*/
public Stylesheet getStylesheet() {
return stylesheet;
}
/* package */
void setStylesheet(Stylesheet stylesheet) {
this.stylesheet = stylesheet;
if (stylesheet != null && stylesheet.getUrl() != null) {
final String stylesheetUrl = stylesheet.getUrl();
int nDeclarations = declarations != null ? declarations.size() : 0;
for (int d=0; d selectors, List declarations) {
this.selectors = selectors;
this.declarations = declarations;
serializedDecls = null;
this.bssVersion = Stylesheet.BINARY_CSS_VERSION;
int sMax = selectors != null ? selectors.size() : 0;
for(int i = 0; i < sMax; i++) {
Selector sel = selectors.get(i);
sel.setRule(Rule.this);
}
int dMax = declarations != null ? declarations.size() : 0;
for (int d=0; d selectors, byte[] buf, int bssVersion) {
this.selectors = selectors;
this.declarations = null;
this.serializedDecls = buf;
this.bssVersion = bssVersion;
int sMax = selectors != null ? selectors.size() : 0;
for(int i = 0; i < sMax; i++) {
Selector sel = selectors.get(i);
sel.setRule(Rule.this);
}
}
// Return mask of selectors that match
long applies(Node node, Set[] triggerStates) {
long mask = 0;
for (int i = 0; i < selectors.size(); i++) {
Selector sel = selectors.get(i);
if (sel.applies(node, triggerStates, 0)) {
mask |= 1l << i;
}
}
return mask;
}
/**
* Converts this object to a {@code String}.
* @return the converted {@code String}
*/
@Override public String toString() {
StringBuilder sb = new StringBuilder();
if (selectors.size()>0) {
sb.append(selectors.get(0));
}
for (int n=1; n(rule.getUnobservedSelectorList()) {
@Override protected void onChanged(Change c) {
while (c.next()) {
if (c.wasAdded()) {
List added = c.getAddedSubList();
for(int i = 0, max = added.size(); i < max; i++) {
Selector sel = added.get(i);
sel.setRule(Observables.this.rule);
}
}
if (c.wasRemoved()) {
List removed = c.getRemoved();
for(int i = 0, max = removed.size(); i < max; i++) {
Selector sel = removed.get(i);
if (sel.getRule() == Observables.this.rule) {
sel.setRule(null);
}
}
}
}
}
};
declarationObservableList = new TrackableObservableList<>(rule.getUnobservedDeclarationList()) {
@Override protected void onChanged(Change c) {
while (c.next()) {
if (c.wasAdded()) {
List added = c.getAddedSubList();
for(int i = 0, max = added.size(); i < max; i++) {
Declaration decl = added.get(i);
decl.rule = Observables.this.rule;
Stylesheet stylesheet = Observables.this.rule.stylesheet;
if (stylesheet != null && stylesheet.getUrl() != null) {
final String stylesheetUrl = stylesheet.getUrl();
decl.fixUrl(stylesheetUrl);
}
}
}
if (c.wasRemoved()) {
List removed = c.getRemoved();
for(int i = 0, max = removed.size(); i < max; i++) {
Declaration decl = removed.get(i);
if (decl.rule == Observables.this.rule) {
decl.rule = null;
}
}
}
}
}
};
}
private ObservableList getSelectors() {
return selectorObservableList;
}
private ObservableList getDeclarations() {
return declarationObservableList;
}
private final Rule rule;
private final ObservableList selectorObservableList;
private final ObservableList declarationObservableList;
}
final void writeBinary(DataOutputStream os, StyleConverter.StringStore stringStore)
throws IOException {
final int nSelectors = this.selectors != null ? this.selectors.size() : 0;
os.writeShort(nSelectors);
for (int i = 0; i < nSelectors; i++) {
Selector sel = this.selectors.get(i);
sel.writeBinary(os, stringStore);
}
List decls = getUnobservedDeclarationList();
if (decls != null) {
ByteArrayOutputStream bos = new ByteArrayOutputStream(5192);
DataOutputStream dos = new DataOutputStream(bos);
int nDeclarations = decls.size();
dos.writeShort(nDeclarations);
for (int i = 0; i < nDeclarations; i++) {
Declaration decl = declarations.get(i);
decl.writeBinary(dos, stringStore);
}
os.writeInt(bos.size());
os.write(bos.toByteArray());
} else {
// no declarations!
os.writeShort(0);
}
}
static Rule readBinary(int bssVersion, DataInputStream is, String[] strings)
throws IOException
{
short nSelectors = is.readShort();
List selectors = new ArrayList<>(nSelectors);
for (int i = 0; i < nSelectors; i++) {
Selector s = Selector.readBinary(bssVersion, is, strings);
selectors.add(s);
}
if (bssVersion < 4) {
short nDeclarations = is.readShort();
List declarations = new ArrayList<>(nDeclarations);
for (int i = 0; i < nDeclarations; i++) {
Declaration d = Declaration.readBinary(bssVersion, is, strings);
declarations.add(d);
}
return new Rule(selectors, declarations);
}
// de-serialize decls into byte array
int nBytes = is.readInt();
byte[] buf = new byte[nBytes];
if (nBytes > 0) {
is.readFully(buf);
}
return new Rule(selectors, buf, bssVersion);
}
}
