Merge pull request #333 from cedricziel/ns-implicit-usage

[T3CMS] Add ImplicitUsageProvider for TYPO3 XML Namespaces

typo3-cms/src/main/java/com/cedricziel/idea/typo3/codeInspection/daemon/XmlNamespaceImplicitUsageProvider.java

@@ -0,0 +1,50 @@
+package com.cedricziel.idea.typo3.codeInspection.daemon;
+
+import com.intellij.codeInsight.daemon.ImplicitUsageProvider;
+import com.intellij.lang.xml.XMLLanguage;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.xml.XmlAttribute;
+import org.jetbrains.annotations.NotNull;
+
+public class XmlNamespaceImplicitUsageProvider implements ImplicitUsageProvider {
+    /**
+     * @param element The element
+     * @return true if element should not be reported as unused
+     */
+    @Override
+    public boolean isImplicitUsage(@NotNull PsiElement element) {
+        if (!(element.getLanguage() instanceof XMLLanguage)) {
+            return false;
+        }
+
+        if (!(element instanceof XmlAttribute)) {
+            return false;
+        }
+
+        if (!((XmlAttribute) element).isNamespaceDeclaration()) {
+            return false;
+        }
+
+        String namespace = ((XmlAttribute) element).getValue();
+
+        return namespace != null && namespace.contains("typo3.org/ns");
+    }
+
+    /**
+     * @param element The element
+     * @return true if element should not be reported as "assigned but not used"
+     */
+    @Override
+    public boolean isImplicitRead(@NotNull PsiElement element) {
+        return false;
+    }
+
+    /**
+     * @param element The element
+     * @return true if element should not be reported as "referenced but never assigned"
+     */
+    @Override
+    public boolean isImplicitWrite(@NotNull PsiElement element) {
+        return false;
+    }
+}

typo3-cms/src/main/resources/META-INF/plugin.xml

@@ -194,6 +194,7 @@
                                    implementationClass="com.cedricziel.idea.typo3.codeInspection.XmlUnusedNamespaceDeclarationSuppressor"/>
         <lang.inspectionSuppressor language="XHTML"
                                    implementationClass="com.cedricziel.idea.typo3.codeInspection.XmlUnusedNamespaceDeclarationSuppressor"/>
+        <implicitUsageProvider implementation="com.cedricziel.idea.typo3.codeInspection.daemon.XmlNamespaceImplicitUsageProvider"/>
     </extensions>
 
     <actions>

typo3-cms/src/test/java/com/cedricziel/idea/typo3/codeInspection/daemon/XmlNamespaceImplicitUsageProviderTest.java

@@ -0,0 +1,19 @@
+package com.cedricziel.idea.typo3.codeInspection.daemon;
+
+import com.cedricziel.idea.typo3.AbstractTestCase;
+import com.intellij.codeInsight.daemon.impl.analysis.XmlUnusedNamespaceInspection;
+
+public class XmlNamespaceImplicitUsageProviderTest extends AbstractTestCase {
+    @Override
+    protected String getTestDataPath() {
+        return super.getTestDataPath() + "/codeInspection/daemon";
+    }
+
+    public void testOptimizeImportsDoesNotRemoveImports() {
+        myFixture.enableInspections(new XmlUnusedNamespaceInspection());
+
+        myFixture.configureByFile("unused_namespace.html");
+        myFixture.performEditorAction("OptimizeImports");
+        myFixture.checkResultByFile("unused_namespace.html");
+    }
+}

typo3-cms/testData/com/cedricziel/idea/typo3/codeInspection/daemon/unused_namespace.html

@@ -0,0 +1,10 @@
+<div xmlns="http://www.w3.org/1999/xhtml" lang="en"
+     xmlns:v="http://typo3.org/ns/FluidTYPO3/Vhs/ViewHelpers"
+     xmlns:f="http://typo3.org/ns/TYPO3/Fluid/ViewHelpers"
+     xmlns:flux="http://typo3.org/ns/FluidTYPO3/Flux/ViewHelpers"
+     xmlns:yp="http://typo3.org/ns/Vendor/YourPlugin/ViewHelpers"
+
+     flux:schemaLocation="http://fluidtypo3.org/schemas/flux-7.0.0.xsd"
+     v:schemaLocation="http://fluidtypo3.org/schemas/vhs-1.8.5.xsd">
+     <!-- Fluid goes here -->
+</div>