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/*
* 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.databinding;
import com.google.common.base.Preconditions;
import com.android.databinding.expr.Dependency;
import com.android.databinding.expr.Expr;
import com.android.databinding.expr.ExprModel;
import com.android.databinding.expr.IdentifierExpr;
import com.android.databinding.store.ResourceBundle;
import com.android.databinding.util.ParserHelper;
import com.android.databinding.writer.LayoutBinderWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Keeps all information about the bindings per layout file
*/
public class LayoutBinder {
/*
* val pkg: String, val projectPackage: String, val baseClassName: String,
val layoutName:String, val lb: LayoutExprBinding*/
private final ExprModel mExprModel;
private final ExpressionParser mExpressionParser;
private final List<BindingTarget> mBindingTargets;
private String mPackage;
private String mProjectPackage;
private String mBaseClassName;
private final HashMap<String, String> mUserDefinedVariables = new HashMap<String, String>();
private LayoutBinderWriter mWriter;
private ResourceBundle.LayoutFileBundle mBundle;
public LayoutBinder(ResourceBundle resourceBundle,
ResourceBundle.LayoutFileBundle layoutBundle) {
mExprModel = new ExprModel();
mExpressionParser = new ExpressionParser(mExprModel);
mBindingTargets = new ArrayList<BindingTarget>();
mBundle = layoutBundle;
mProjectPackage = resourceBundle.getAppPackage();
mPackage = mProjectPackage + ".generated";
mBaseClassName = ParserHelper.INSTANCE$.toClassName(layoutBundle.getFileName()) + "Binding";
// copy over data.
for (Map.Entry<String, String> variable : mBundle.getVariables().entrySet()) {
addVariable(variable.getKey(), variable.getValue());
}
for (Map.Entry<String, String> userImport : mBundle.getImports().entrySet()) {
mExprModel.addImport(userImport.getKey(), userImport.getValue());
}
for (ResourceBundle.BindingTargetBundle targetBundle : mBundle.getBindingTargetBundles()) {
final BindingTarget bindingTarget = createBindingTarget(targetBundle);
for (ResourceBundle.BindingTargetBundle.BindingBundle bindingBundle : targetBundle
.getBindingBundleList()) {
bindingTarget.addBinding(bindingBundle.getName(), parse(bindingBundle.getExpr()));
}
}
}
public void resolveWhichExpressionsAreUsed() {
List<Expr> used = new ArrayList<Expr>();
for (BindingTarget target : mBindingTargets) {
for (Binding binding : target.getBindings()) {
binding.getExpr().setIsUsed(true);
used.add(binding.getExpr());
}
}
while (!used.isEmpty()) {
Expr e = used.remove(used.size() - 1);
for (Dependency dep : e.getDependencies()) {
if (!dep.getOther().isUsed()) {
used.add(dep.getOther());
dep.getOther().setIsUsed(true);
}
}
}
}
public IdentifierExpr addVariable(String name, String type) {
Preconditions.checkState(!mUserDefinedVariables.containsKey(name),
"%s has already been defined as %s", name, type);
final IdentifierExpr id = mExprModel.identifier(name);
id.setUserDefinedType(type);
id.enableDirectInvalidation();
mUserDefinedVariables.put(name, type);
return id;
}
public HashMap<String, String> getUserDefinedVariables() {
return mUserDefinedVariables;
}
public BindingTarget createBindingTarget(ResourceBundle.BindingTargetBundle targetBundle) {
final BindingTarget target = new BindingTarget(targetBundle);
mBindingTargets.add(target);
target.setModel(mExprModel);
return target;
}
public Expr parse(String input) {
final Expr parsed = mExpressionParser.parse(input);
parsed.setBindingExpression(true);
return parsed;
}
public List<BindingTarget> getBindingTargets() {
return mBindingTargets;
}
public boolean isEmpty() {
return mExprModel.size() == 0;
}
public ExprModel getModel() {
return mExprModel;
}
private void ensureWriter() {
if (mWriter == null) {
mWriter = new LayoutBinderWriter(this);
}
}
public String writeViewBinderInterface() {
ensureWriter();
return mWriter.writeBaseClass();
}
public String writeViewBinder() {
mExprModel.seal();
ensureWriter();
Preconditions.checkNotNull(mPackage, "package cannot be null");
Preconditions.checkNotNull(mProjectPackage, "project package cannot be null");
Preconditions.checkNotNull(mBaseClassName, "base class name cannot be null");
return mWriter.write();
}
public String getPackage() {
return mPackage;
}
public void setPackage(String aPackage) {
mPackage = aPackage;
}
public String getProjectPackage() {
return mProjectPackage;
}
public String getLayoutname() {
return mBundle.getFileName();
}
public String getClassName() {
final String suffix;
if (hasVariations()) {
suffix = mBundle.getConfigName();
} else {
suffix = "";
}
return mBaseClassName + suffix + "Impl";
}
public String getInterfaceName() {
return mBaseClassName;
}
public int getId() {
return mBundle.getLayoutId();
}
public boolean hasVariations() {
return mBundle.hasVariations();
}
}
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