add support for Twig apply tag filters

src/main/java/fr/adrienbrault/idea/symfony2plugin/templating/TwigPattern.java

@@ -1089,6 +1089,27 @@ public static ElementPattern<PsiElement> getFilterPattern() {
             .withLanguage(TwigLanguage.INSTANCE);
     }
 
+    /**
+     * {% apply <caret> %}foobar{% endapply %}
+     */
+    static ElementPattern<PsiElement> getApplyFilterPattern() {
+        return PlatformPatterns
+            .psiElement(TwigTokenTypes.IDENTIFIER)
+            .afterLeafSkipping(
+                PlatformPatterns.or(
+                    PlatformPatterns.psiElement(PsiWhiteSpace.class),
+                    PlatformPatterns.psiElement(TwigTokenTypes.WHITE_SPACE)
+                ),
+                PlatformPatterns.psiElement(TwigTokenTypes.TAG_NAME).with(new PatternCondition<PsiElement>("aa") {
+                    @Override
+                    public boolean accepts(@NotNull PsiElement psiElement, ProcessingContext processingContext) {
+                        return "apply".equalsIgnoreCase(psiElement.getText());
+                    }
+                })
+            )
+            .withLanguage(TwigLanguage.INSTANCE);
+    }
+
     public static ElementPattern<PsiElement> getForTagInVariablePattern() {
 
         // {% for key, user in "users" %}

src/main/java/fr/adrienbrault/idea/symfony2plugin/templating/TwigTemplateCompletionContributor.java

@@ -171,6 +171,21 @@ private void attachLookupElements(@NotNull CompletionResultSet resultSet, Collec
             new FilterCompletionProvider()
         );
 
+        // {% apply upper %}This text becomes uppercase{% endapply %}
+        extend(
+            CompletionType.BASIC,
+            TwigPattern.getApplyFilterPattern(),
+            new CompletionProvider<CompletionParameters>() {
+                @Override
+                protected void addCompletions(@NotNull CompletionParameters completionParameters, @NotNull ProcessingContext processingContext, @NotNull CompletionResultSet completionResultSet) {
+                    Project project = completionParameters.getPosition().getProject();
+                    for(Map.Entry<String, TwigExtension> entry : new TwigExtensionParser(project).getFilters().entrySet()) {
+                        completionResultSet.addElement(new TwigExtensionLookupElement(project, entry.getKey(), entry.getValue()));
+                    }
+                }
+            }
+        );
+
         // provides support for {{ '<xxx>' }}
         extend(
             CompletionType.BASIC,

src/main/java/fr/adrienbrault/idea/symfony2plugin/templating/TwigTemplateGoToDeclarationHandler.java

@@ -103,7 +103,7 @@ public PsiElement[] getGotoDeclarationTargets(PsiElement psiElement, int offset,
             targets.addAll(TranslationUtil.getDomainPsiFiles(psiElement.getProject(), psiElement.getText()));
         }
 
-        if(TwigPattern.getFilterPattern().accepts(psiElement)) {
+        if(PlatformPatterns.or(TwigPattern.getFilterPattern(), TwigPattern.getApplyFilterPattern()).accepts(psiElement)) {
             targets.addAll(getFilterGoTo(psiElement));
         }
 

src/test/java/fr/adrienbrault/idea/symfony2plugin/tests/templating/TwigFilterCompletionContributorTest.java

@@ -6,11 +6,12 @@
 import com.jetbrains.twig.TwigFileType;
 import com.jetbrains.twig.elements.TwigElementTypes;
 import fr.adrienbrault.idea.symfony2plugin.templating.TwigPattern;
+import fr.adrienbrault.idea.symfony2plugin.templating.TwigTemplateCompletionContributor;
 import fr.adrienbrault.idea.symfony2plugin.tests.SymfonyLightCodeInsightFixtureTestCase;
 
 /**
  * @author Daniel Espendiller <daniel@espendiller.net>
- * @see com.jetbrains.twig.completion.TwigCompletionContributor
+ * @see TwigTemplateCompletionContributor
  */
 public class TwigFilterCompletionContributorTest extends SymfonyLightCodeInsightFixtureTestCase {
 
@@ -30,6 +31,11 @@ public void testTwigExtensionFilterCompletion() {
         assertCompletionContains(TwigFileType.INSTANCE, "{{     'test'    |       <caret>   }}", "doctrine_minify_query", "doctrine_pretty_query");
     }
 
+    public void testTwigExtensionFilterViaApplyCompletion() {
+        assertCompletionContains(TwigFileType.INSTANCE, "{% apply <caret> %}foo{% endapply %}", "doctrine_minify_query", "doctrine_pretty_query");
+        assertNavigationContains(TwigFileType.INSTANCE, "{% apply doctrine<caret>_minify_query %}foo{% endapply %}", "Doctrine\\Bundle\\DoctrineBundle\\Twig\\DoctrineExtension::minifyQuery");
+    }
+
     public void testTwigExtensionFilterNavigation() {
         assertNavigationContains(TwigFileType.INSTANCE, "{{ 'test'|<caret>doctrine_minify_query }}", "Doctrine\\Bundle\\DoctrineBundle\\Twig\\DoctrineExtension::minifyQuery");
         assertNavigationContains(TwigFileType.INSTANCE, "{{ 'test'|<caret>doctrine_pretty_query }}", "SqlFormatter::format");
@@ -164,7 +170,7 @@ public void testControllerReferences() {
 
     /**
      * @see fr.adrienbrault.idea.symfony2plugin.templating.TwigTemplateCompletionContributor
-     * @see fr.adrienbrault.idea.symfony2plugin.templating.TwigTemplateGoToLocalDeclarationHandler
+     * @see fr.adrienbrault.idea.symfony2plugin.templating.TwigTemplateGoToDeclarationHandler
      */
     public void testSetTagIsAvailableForFunctionReferences() {
         assertCompletionContains(TwigFileType.INSTANCE, "{% set = <caret> %}", "json_bar");