1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/PageProcessor.java Fri Nov 09 11:47:00 2012 +0100
1.3 @@ -0,0 +1,233 @@
1.4 +/**
1.5 + * Back 2 Browser Bytecode Translator
1.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
1.7 + *
1.8 + * This program is free software: you can redistribute it and/or modify
1.9 + * it under the terms of the GNU General Public License as published by
1.10 + * the Free Software Foundation, version 2 of the License.
1.11 + *
1.12 + * This program is distributed in the hope that it will be useful,
1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.15 + * GNU General Public License for more details.
1.16 + *
1.17 + * You should have received a copy of the GNU General Public License
1.18 + * along with this program. Look for COPYING file in the top folder.
1.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
1.20 + */
1.21 +package org.apidesign.bck2brwsr.htmlpage;
1.22 +
1.23 +import java.io.IOException;
1.24 +import java.io.InputStream;
1.25 +import java.io.OutputStreamWriter;
1.26 +import java.io.Writer;
1.27 +import java.util.ArrayList;
1.28 +import java.util.Collections;
1.29 +import java.util.List;
1.30 +import java.util.Locale;
1.31 +import java.util.Set;
1.32 +import javax.annotation.processing.AbstractProcessor;
1.33 +import javax.annotation.processing.Completion;
1.34 +import javax.annotation.processing.Completions;
1.35 +import javax.annotation.processing.Processor;
1.36 +import javax.annotation.processing.RoundEnvironment;
1.37 +import javax.annotation.processing.SupportedAnnotationTypes;
1.38 +import javax.lang.model.element.AnnotationMirror;
1.39 +import javax.lang.model.element.Element;
1.40 +import javax.lang.model.element.ElementKind;
1.41 +import javax.lang.model.element.ExecutableElement;
1.42 +import javax.lang.model.element.Modifier;
1.43 +import javax.lang.model.element.PackageElement;
1.44 +import javax.lang.model.element.TypeElement;
1.45 +import javax.lang.model.type.TypeMirror;
1.46 +import javax.tools.Diagnostic;
1.47 +import javax.tools.FileObject;
1.48 +import javax.tools.StandardLocation;
1.49 +import org.apidesign.bck2brwsr.htmlpage.api.OnClick;
1.50 +import org.apidesign.bck2brwsr.htmlpage.api.Page;
1.51 +import org.openide.util.lookup.ServiceProvider;
1.52 +
1.53 +/** Annotation processor to process an XHTML page and generate appropriate
1.54 + * "id" file.
1.55 + *
1.56 + * @author Jaroslav Tulach <jtulach@netbeans.org>
1.57 + */
1.58 +@ServiceProvider(service=Processor.class)
1.59 +@SupportedAnnotationTypes({
1.60 + "org.apidesign.bck2brwsr.htmlpage.api.Page",
1.61 + "org.apidesign.bck2brwsr.htmlpage.api.OnClick"
1.62 +})
1.63 +public final class PageProcessor extends AbstractProcessor {
1.64 + @Override
1.65 + public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
1.66 + for (Element e : roundEnv.getElementsAnnotatedWith(Page.class)) {
1.67 + Page p = e.getAnnotation(Page.class);
1.68 + PackageElement pe = (PackageElement)e.getEnclosingElement();
1.69 + String pkg = pe.getQualifiedName().toString();
1.70 +
1.71 + ProcessPage pp;
1.72 + try {
1.73 + InputStream is = openStream(pkg, p.xhtml());
1.74 + pp = ProcessPage.readPage(is);
1.75 + is.close();
1.76 + } catch (IOException iOException) {
1.77 + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't read " + p.xhtml(), e);
1.78 + return false;
1.79 + }
1.80 + Writer w;
1.81 + String className = p.className();
1.82 + if (className.isEmpty()) {
1.83 + int indx = p.xhtml().indexOf('.');
1.84 + className = p.xhtml().substring(0, indx);
1.85 + }
1.86 + try {
1.87 + FileObject java = processingEnv.getFiler().createSourceFile(pkg + '.' + className, e);
1.88 + w = new OutputStreamWriter(java.openOutputStream());
1.89 + try {
1.90 + w.append("package " + pkg + ";\n");
1.91 + w.append("import org.apidesign.bck2brwsr.htmlpage.api.*;\n");
1.92 + w.append("class ").append(className).append(" {\n");
1.93 + for (String id : pp.ids()) {
1.94 + String tag = pp.tagNameForId(id);
1.95 + String type = type(tag);
1.96 + w.append(" ").append("public static final ").
1.97 + append(type).append(' ').append(cnstnt(id)).append(" = new ").
1.98 + append(type).append("(\"").append(id).append("\");\n");
1.99 + }
1.100 + w.append(" static {\n");
1.101 + if (!initializeOnClick(pe, w, pp)) {
1.102 + return false;
1.103 + }
1.104 + w.append(" }\n");
1.105 + w.append("}\n");
1.106 + } finally {
1.107 + w.close();
1.108 + }
1.109 + } catch (IOException ex) {
1.110 + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Can't create " + className + ".java", e);
1.111 + return false;
1.112 + }
1.113 + }
1.114 + return true;
1.115 + }
1.116 +
1.117 + private InputStream openStream(String pkg, String name) throws IOException {
1.118 + try {
1.119 + FileObject fo = processingEnv.getFiler().getResource(
1.120 + StandardLocation.SOURCE_PATH, pkg, name);
1.121 + return fo.openInputStream();
1.122 + } catch (IOException ex) {
1.123 + return processingEnv.getFiler().getResource(StandardLocation.CLASS_OUTPUT, pkg, name).openInputStream();
1.124 + }
1.125 + }
1.126 +
1.127 + private static String type(String tag) {
1.128 + if (tag.equals("title")) {
1.129 + return "Title";
1.130 + }
1.131 + if (tag.equals("button")) {
1.132 + return "Button";
1.133 + }
1.134 + if (tag.equals("input")) {
1.135 + return "Input";
1.136 + }
1.137 + return "Element";
1.138 + }
1.139 +
1.140 + private static String cnstnt(String id) {
1.141 + return id.toUpperCase(Locale.ENGLISH).replace('.', '_');
1.142 + }
1.143 +
1.144 + private boolean initializeOnClick(PackageElement pe, Writer w, ProcessPage pp) throws IOException {
1.145 + TypeMirror stringType = processingEnv.getElementUtils().getTypeElement("java.lang.String").asType();
1.146 + for (Element clazz : pe.getEnclosedElements()) {
1.147 + if (clazz.getKind() != ElementKind.CLASS) {
1.148 + continue;
1.149 + }
1.150 + TypeElement type = (TypeElement)clazz;
1.151 + for (Element method : clazz.getEnclosedElements()) {
1.152 + OnClick oc = method.getAnnotation(OnClick.class);
1.153 + if (oc != null) {
1.154 + for (String id : oc.id()) {
1.155 + if (pp.tagNameForId(id) == null) {
1.156 + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "id = " + oc.id() + " does not exist in the HTML page. Found only " + pp.ids(), method);
1.157 + return false;
1.158 + }
1.159 + ExecutableElement ee = (ExecutableElement)method;
1.160 + boolean hasParam;
1.161 + if (ee.getParameters().isEmpty()) {
1.162 + hasParam = false;
1.163 + } else {
1.164 + if (ee.getParameters().size() != 1 || ee.getParameters().get(0).asType() != stringType) {
1.165 + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClick method should either have no arguments or one String argument", ee);
1.166 + return false;
1.167 + }
1.168 + hasParam = true;
1.169 + }
1.170 + if (!ee.getModifiers().contains(Modifier.STATIC)) {
1.171 + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClick method has to be static", ee);
1.172 + return false;
1.173 + }
1.174 + if (ee.getModifiers().contains(Modifier.PRIVATE)) {
1.175 + processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "@OnClick method can't be private", ee);
1.176 + return false;
1.177 + }
1.178 + w.append(" ").append(cnstnt(id)).
1.179 + append(".addOnClick(new Runnable() { public void run() {\n");
1.180 + w.append(" ").append(type.getSimpleName().toString()).
1.181 + append('.').append(ee.getSimpleName()).append("(");
1.182 + if (hasParam) {
1.183 + w.append("\"").append(id).append("\"");
1.184 + }
1.185 + w.append(");\n");
1.186 + w.append(" }});\n");
1.187 + }
1.188 + }
1.189 + }
1.190 + }
1.191 + return true;
1.192 + }
1.193 +
1.194 + @Override
1.195 + public Iterable<? extends Completion> getCompletions(
1.196 + Element element, AnnotationMirror annotation,
1.197 + ExecutableElement member, String userText
1.198 + ) {
1.199 + if (!userText.startsWith("\"")) {
1.200 + return Collections.emptyList();
1.201 + }
1.202 +
1.203 + Element cls = findClass(element);
1.204 + Page p = cls.getAnnotation(Page.class);
1.205 + PackageElement pe = (PackageElement) cls.getEnclosingElement();
1.206 + String pkg = pe.getQualifiedName().toString();
1.207 + ProcessPage pp;
1.208 + try {
1.209 + InputStream is = openStream(pkg, p.xhtml());
1.210 + pp = ProcessPage.readPage(is);
1.211 + is.close();
1.212 + } catch (IOException iOException) {
1.213 + return Collections.emptyList();
1.214 + }
1.215 +
1.216 + List<Completion> cc = new ArrayList<Completion>();
1.217 + userText = userText.substring(1);
1.218 + for (String id : pp.ids()) {
1.219 + if (id.startsWith(userText)) {
1.220 + cc.add(Completions.of("\"" + id + "\"", id));
1.221 + }
1.222 + }
1.223 + return cc;
1.224 + }
1.225 +
1.226 + private static Element findClass(Element e) {
1.227 + if (e == null) {
1.228 + return null;
1.229 + }
1.230 + Page p = e.getAnnotation(Page.class);
1.231 + if (p != null) {
1.232 + return e;
1.233 + }
1.234 + return e.getEnclosingElement();
1.235 + }
1.236 +}