Android: navigate to resource

Implementation mostly copied from android plugin
 #KT-5596 Fixed

idea/kotlin-android-plugin/kotlin-android-plugin.iml

@@ -10,6 +10,7 @@
     <orderEntry type="library" name="android-plugin" level="project" />
     <orderEntry type="library" name="kotlin-runtime" level="project" />
     <orderEntry type="library" name="idea-full" level="project" />
+    <orderEntry type="module" module-name="frontend" />
   </component>
 </module>
 

idea/kotlin-android-plugin/src/org/jetbrains/jet/android/navigation/KotlinAndroidGotoDeclarationHandler.java

@@ -0,0 +1,152 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.android.navigation;
+
+import com.android.resources.ResourceType;
+import com.intellij.codeInsight.navigation.actions.GotoDeclarationHandler;
+import com.intellij.openapi.actionSystem.DataContext;
+import com.intellij.openapi.editor.Editor;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiFile;
+import com.intellij.psi.xml.XmlElement;
+import org.jetbrains.android.dom.AndroidAttributeValue;
+import org.jetbrains.android.dom.manifest.Manifest;
+import org.jetbrains.android.dom.manifest.ManifestElementWithRequiredName;
+import org.jetbrains.android.dom.resources.Attr;
+import org.jetbrains.android.dom.resources.DeclareStyleable;
+import org.jetbrains.android.facet.AndroidFacet;
+import org.jetbrains.android.resourceManagers.LocalResourceManager;
+import org.jetbrains.android.resourceManagers.ResourceManager;
+import org.jetbrains.android.util.AndroidResourceUtil;
+import org.jetbrains.android.util.AndroidUtils;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.jet.lang.psi.JetSimpleNameExpression;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+// TODO: ask for extension point
+// this class is mostly copied from org.jetbrains.android.AndroidGotoDeclarationHandler
+public class KotlinAndroidGotoDeclarationHandler implements GotoDeclarationHandler {
+    @Override
+    public PsiElement[] getGotoDeclarationTargets(@Nullable PsiElement sourceElement, int offset, Editor editor) {
+        JetSimpleNameExpression referenceExpression = NavigationPackage.getReferenceExpression(sourceElement);
+        if (referenceExpression == null) {
+            return null;
+        }
+
+        PsiFile file = referenceExpression.getContainingFile();
+        if (file == null) {
+            return null;
+        }
+
+        AndroidFacet facet = AndroidFacet.getInstance(file);
+        if (facet == null) {
+            return null;
+        }
+
+        AndroidResourceUtil.MyReferredResourceFieldInfo info = NavigationPackage.getInfo(referenceExpression, facet);
+
+        if (info == null) return null;
+
+        String nestedClassName = info.getClassName();
+        String fieldName = info.getFieldName();
+        List<PsiElement> resourceList = new ArrayList<PsiElement>();
+
+        if (info.isFromManifest()) {
+            collectManifestElements(nestedClassName, fieldName, facet, resourceList);
+        }
+        else {
+            ResourceManager manager = info.isSystem()
+                                      ? facet.getSystemResourceManager(false)
+                                      : facet.getLocalResourceManager();
+            if (manager == null) {
+                return null;
+            }
+            manager.collectLazyResourceElements(nestedClassName, fieldName, false, referenceExpression, resourceList);
+
+            if (manager instanceof LocalResourceManager) {
+                LocalResourceManager lrm = (LocalResourceManager) manager;
+
+                if (nestedClassName.equals(ResourceType.ATTR.getName())) {
+                    for (Attr attr : lrm.findAttrs(fieldName)) {
+                        resourceList.add(attr.getName().getXmlAttributeValue());
+                    }
+                }
+                else if (nestedClassName.equals(ResourceType.STYLEABLE.getName())) {
+                    for (DeclareStyleable styleable : lrm.findStyleables(fieldName)) {
+                        resourceList.add(styleable.getName().getXmlAttributeValue());
+                    }
+
+                    for (Attr styleable : lrm.findStyleableAttributesByFieldName(fieldName)) {
+                        resourceList.add(styleable.getName().getXmlAttributeValue());
+                    }
+                }
+            }
+        }
+
+        if (resourceList.size() > 1) {
+            // Sort to ensure the output is stable, and to prefer the base folders
+            Collections.sort(resourceList, AndroidResourceUtil.RESOURCE_ELEMENT_COMPARATOR);
+        }
+
+        return resourceList.toArray(new PsiElement[resourceList.size()]);
+    }
+
+    private static void collectManifestElements(
+            @NotNull String nestedClassName,
+            @NotNull String fieldName,
+            @NotNull AndroidFacet facet,
+            @NotNull List<PsiElement> result
+    ) {
+        Manifest manifest = facet.getManifest();
+
+        if (manifest == null) {
+            return;
+        }
+        List<? extends ManifestElementWithRequiredName> list;
+
+        if ("permission".equals(nestedClassName)) {
+            list = manifest.getPermissions();
+        }
+        else if ("permission_group".equals(nestedClassName)) {
+            list = manifest.getPermissionGroups();
+        }
+        else {
+            return;
+        }
+        for (ManifestElementWithRequiredName domElement : list) {
+            AndroidAttributeValue<String> nameAttribute = domElement.getName();
+            String name = nameAttribute.getValue();
+
+            if (AndroidUtils.equal(name, fieldName, false)) {
+                XmlElement psiElement = nameAttribute.getXmlAttributeValue();
+
+                if (psiElement != null) {
+                    result.add(psiElement);
+                }
+            }
+        }
+    }
+
+    @Override
+    public String getActionText(DataContext context) {
+        return null;
+    }
+}

idea/kotlin-android-plugin/src/org/jetbrains/jet/android/navigation/gotoResourceHelper.kt

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * 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 org.jetbrains.jet.android.navigation
+
+import org.jetbrains.android.util.AndroidResourceUtil
+import com.intellij.psi.PsiElement
+import org.jetbrains.android.facet.AndroidFacet
+import org.jetbrains.jet.lang.psi.JetSimpleNameExpression
+import com.intellij.psi.util.PsiTreeUtil
+import com.intellij.psi.PsiClass
+import org.jetbrains.android.util.AndroidUtils
+import com.android.SdkConstants
+import org.jetbrains.android.augment.AndroidPsiElementFinder
+import org.jetbrains.jet.lang.psi.JetDotQualifiedExpression
+import org.jetbrains.jet.lang.psi.psiUtil.getReceiverExpression
+import org.jetbrains.jet.lang.psi.JetExpression
+
+private fun getReferenceExpression(element: PsiElement?): JetSimpleNameExpression? {
+    return PsiTreeUtil.getParentOfType<JetSimpleNameExpression>(element, javaClass<JetSimpleNameExpression>())
+}
+
+// given 'R.a.b' returns info for all three parts of the expression 'a', 'b', 'R'
+private fun getInfo(
+        referenceExpression: JetSimpleNameExpression,
+        facet: AndroidFacet
+): AndroidResourceUtil.MyReferredResourceFieldInfo? {
+    val info = getReferredInfo(referenceExpression, facet)
+    if (info != null) return info
+
+    val topMostQualified = referenceExpression.getParentQualified().getParentQualified() ?: return null
+    val selectorCandidate = topMostQualified.getSelectorExpression() as? JetSimpleNameExpression ?: return null
+    return getReferredInfo(selectorCandidate, facet)
+}
+
+private fun JetExpression?.getParentQualified(): JetDotQualifiedExpression? {
+    return this?.getParent() as? JetDotQualifiedExpression
+}
+
+// returns info if passed expression is 'b' in 'R.a.b'
+private fun getReferredInfo(
+        lastPart: JetSimpleNameExpression,
+        facet: AndroidFacet
+): AndroidResourceUtil.MyReferredResourceFieldInfo? {
+    val resFieldName = lastPart.getReferencedName()
+    if (resFieldName.isEmpty()) return null
+
+    val middlePart = getReceiverAsSimpleNameExpression(lastPart) ?: return null
+
+    val resClassName = middlePart.getReferencedName()
+    if (resClassName.isEmpty()) return null
+
+    val firstPart = getReceiverAsSimpleNameExpression(middlePart) ?: return null
+
+    val reference = firstPart.getReference() ?: return null
+
+    val resolvedClass = reference.resolve() as? PsiClass ?: return null
+
+    //the following code is copied from
+    // org.jetbrains.android.util.AndroidResourceUtil.getReferredResourceOrManifestField
+    // (org.jetbrains.android.facet.AndroidFacet, com.intellij.psi.PsiReferenceExpression, java.lang.String, boolean)
+    val classShortName = resolvedClass.getName()
+
+    val fromManifest = AndroidUtils.MANIFEST_CLASS_NAME == classShortName
+
+    if (!fromManifest && AndroidUtils.R_CLASS_NAME != classShortName) {
+        return null
+    }
+    val qName = resolvedClass.getQualifiedName()
+
+    if (SdkConstants.CLASS_R == qName || AndroidPsiElementFinder.INTERNAL_R_CLASS_QNAME == qName) {
+        return AndroidResourceUtil.MyReferredResourceFieldInfo(resClassName, resFieldName, true, false)
+    }
+    val containingFile = resolvedClass.getContainingFile() ?: return null
+
+    val isFromCorrectFile =
+            if (fromManifest) AndroidResourceUtil.isManifestJavaFile(facet, containingFile)
+            else AndroidResourceUtil.isRJavaFile(facet, containingFile)
+
+    if (!isFromCorrectFile) {
+        return null
+    }
+
+    return AndroidResourceUtil.MyReferredResourceFieldInfo(resClassName, resFieldName, false, fromManifest)
+}
+
+private fun getReceiverAsSimpleNameExpression(exp: JetSimpleNameExpression): JetSimpleNameExpression? {
+    val receiver = exp.getReceiverExpression()
+    return when (receiver) {
+        is JetSimpleNameExpression -> {
+            receiver
+        }
+        is JetDotQualifiedExpression -> {
+            receiver.getSelectorExpression() as? JetSimpleNameExpression
+        }
+        else -> null
+    }
+
+}

idea/src/META-INF/android.xml

@@ -1,2 +1,5 @@
 <idea-plugin>
+    <extensions defaultExtensionNs="com.intellij">
+        <gotoDeclarationHandler implementation="org.jetbrains.jet.android.navigation.KotlinAndroidGotoDeclarationHandler"/>
+    </extensions>
 </idea-plugin>