Go To Definition in

resources/META-INF/plugin.xml

@@ -27,6 +27,7 @@
   <extensions defaultExtensionNs="com.intellij">
     <completion.contributor language="PHP" implementationClass="org.klesun.deep_keys.entry.DeepKeysCbtr"/>
     <gotoDeclarationHandler implementation="org.klesun.deep_keys.entry.DeepKeysGoToDecl"/>
+    <gotoDeclarationHandler implementation="org.klesun.deep_keys.entry.ArrayColumnGoToDecl"/>
   </extensions>
 
   <!-- please see http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/plugin_compatibility.html

src/org/klesun/deep_keys/entry/ArrayColumnGoToDecl.java

@@ -0,0 +1,79 @@
+package org.klesun.deep_keys.entry;
+
+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.jetbrains.php.lang.documentation.phpdoc.psi.tags.PhpDocParamTag;
+import com.jetbrains.php.lang.psi.elements.ArrayIndex;
+import com.jetbrains.php.lang.psi.elements.PhpExpression;
+import com.jetbrains.php.lang.psi.elements.impl.ArrayAccessExpressionImpl;
+import com.jetbrains.php.lang.psi.elements.impl.FunctionReferenceImpl;
+import com.jetbrains.php.lang.psi.elements.impl.StringLiteralExpressionImpl;
+import org.jetbrains.annotations.Nullable;
+import org.klesun.deep_keys.helpers.FuncCtx;
+import org.klesun.deep_keys.helpers.IFuncCtx;
+import org.klesun.deep_keys.helpers.MultiType;
+import org.klesun.deep_keys.helpers.SearchContext;
+import org.klesun.deep_keys.resolvers.var_res.DocParamRes;
+import org.klesun.lang.Lang;
+import org.klesun.lang.Opt;
+import org.klesun.lang.Tls;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * go to declaration functionality for key name in `array_column($segments, 'segmentNumber')`
+ */
+public class ArrayColumnGoToDecl extends Lang implements GotoDeclarationHandler
+{
+    // just treating a symptom. i dunno why duplicates appear - they should not
+    private static void removeDuplicates(List<PsiElement> psiTargets)
+    {
+        Set<PsiElement> fingerprints = new HashSet<>();
+        int size = psiTargets.size();
+        for (int k = size - 1; k >= 0; --k) {
+            if (fingerprints.contains(psiTargets.get(k))) {
+                psiTargets.remove(k);
+            }
+            fingerprints.add(psiTargets.get(k));
+        }
+    }
+
+    @Nullable
+    @Override
+    public PsiElement[] getGotoDeclarationTargets(PsiElement psiElement, int i, Editor editor)
+    {
+        SearchContext search = new SearchContext().setDepth(35);
+        IFuncCtx funcCtx = new FuncCtx(search, L());
+
+        L<PsiElement> psiTargets = opt(psiElement.getParent())
+            .fap(toCast(StringLiteralExpressionImpl.class))
+            .map(literal -> opt(literal.getParent())
+                .map(argList -> argList.getParent())
+                .fap(toCast(FunctionReferenceImpl.class))
+                .flt(call -> "array_column".equals(call.getName()))
+                .fap(call -> L(call.getParameters()).gat(0))
+                .fap(toCast(PhpExpression.class))
+                .map(arr -> funcCtx.findExprType(arr).getEl())
+                .map(mt -> mt.types)
+                .def(L())
+                .fop(arrayType -> getKey(arrayType.keys, literal.getContents()))
+                .map(keyRec -> keyRec.definition))
+            .def(L());
+
+        removeDuplicates(psiTargets);
+
+        return psiTargets.toArray(new PsiElement[psiTargets.size()]);
+    }
+
+    @Nullable
+    @Override
+    public String getActionText(DataContext dataContext) {
+        // dunno what this does
+        return null;
+    }
+}