Impl. Syntax Highlighter for Expression Language

Author: adamwojs

src/main/java/fr/adrienbrault/idea/symfony2plugin/expressionLanguage/ExpressionLanguageColorSettingsPage.java

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+package fr.adrienbrault.idea.symfony2plugin.expressionLanguage;
+
+import com.intellij.openapi.editor.colors.TextAttributesKey;
+import com.intellij.openapi.fileTypes.SyntaxHighlighter;
+import com.intellij.openapi.options.colors.AttributesDescriptor;
+import com.intellij.openapi.options.colors.ColorDescriptor;
+import com.intellij.openapi.options.colors.ColorSettingsPage;
+import fr.adrienbrault.idea.symfony2plugin.Symfony2Icons;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import javax.swing.*;
+import java.util.Map;
+
+public class ExpressionLanguageColorSettingsPage implements ColorSettingsPage {
+
+    private static final AttributesDescriptor[] ATTRIBUTE_DESCRIPTORS = new AttributesDescriptor[]{
+            new AttributesDescriptor("Number", ExpressionLanguageSyntaxHighlighter.NUMBER),
+            new AttributesDescriptor("String", ExpressionLanguageSyntaxHighlighter.STRING),
+            new AttributesDescriptor("Identifier", ExpressionLanguageSyntaxHighlighter.IDENTIFIER),
+            new AttributesDescriptor("Keyword", ExpressionLanguageSyntaxHighlighter.KEYWORD),
+    };
+
+    @Nullable
+    @Override
+    public Icon getIcon() {
+        return Symfony2Icons.SYMFONY;
+    }
+
+    @NotNull
+    @Override
+    public SyntaxHighlighter getHighlighter() {
+        return new ExpressionLanguageSyntaxHighlighter();
+    }
+
+    @NotNull
+    @Override
+    public String getDemoText() {
+        return "article.getCommentCount(true) > 100 and article.category not in [\"misc\", null, true] === false";
+    }
+
+    @NotNull
+    @Override
+    public String getDisplayName() {
+        return "Symfony Expression Language";
+    }
+
+    @NotNull
+    @Override
+    public AttributesDescriptor[] getAttributeDescriptors() {
+        return ATTRIBUTE_DESCRIPTORS;
+    }
+
+    @NotNull
+    @Override
+    public ColorDescriptor[] getColorDescriptors() {
+        return ColorDescriptor.EMPTY_ARRAY;
+    }
+
+    @Override
+    public @Nullable
+    Map<String, TextAttributesKey> getAdditionalHighlightingTagToDescriptorMap() {
+        return null;
+    }
+}
+

src/main/java/fr/adrienbrault/idea/symfony2plugin/expressionLanguage/ExpressionLanguageSyntaxHighlighter.java

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+package fr.adrienbrault.idea.symfony2plugin.expressionLanguage;
+
+import com.intellij.lexer.Lexer;
+import com.intellij.openapi.editor.DefaultLanguageHighlighterColors;
+import com.intellij.openapi.editor.colors.TextAttributesKey;
+import com.intellij.openapi.fileTypes.SyntaxHighlighterBase;
+import com.intellij.psi.tree.IElementType;
+import fr.adrienbrault.idea.symfony2plugin.expressionLanguage.psi.ExpressionLanguageTypes;
+import org.jetbrains.annotations.NotNull;
+
+import static com.intellij.openapi.editor.colors.TextAttributesKey.createTextAttributesKey;
+
+public class ExpressionLanguageSyntaxHighlighter extends SyntaxHighlighterBase {
+
+    public static final TextAttributesKey NUMBER = createTextAttributesKey("NUMBER", DefaultLanguageHighlighterColors.NUMBER);
+    public static final TextAttributesKey STRING = createTextAttributesKey("STRING", DefaultLanguageHighlighterColors.STRING);
+    public static final TextAttributesKey IDENTIFIER = createTextAttributesKey("IDENTIFIER", DefaultLanguageHighlighterColors.IDENTIFIER);
+    public static final TextAttributesKey KEYWORD = createTextAttributesKey("KEYWORD", DefaultLanguageHighlighterColors.KEYWORD);
+
+    private static final TextAttributesKey[] NUMBER_KEYS = new TextAttributesKey[]{NUMBER};
+    private static final TextAttributesKey[] STRING_KEYS = new TextAttributesKey[]{STRING};
+    private static final TextAttributesKey[] IDENTIFIER_KEYS = new TextAttributesKey[]{IDENTIFIER};
+    private static final TextAttributesKey[] KEYWORD_KEYS = new TextAttributesKey[]{KEYWORD};
+    private static final TextAttributesKey[] EMPTY_KEYS = new TextAttributesKey[0];
+
+    @NotNull
+    @Override
+    public Lexer getHighlightingLexer() {
+        return new ExpressionLanguageLexerAdapter();
+    }
+
+    @NotNull
+    @Override
+    public TextAttributesKey[] getTokenHighlights(IElementType tokenType) {
+        if (tokenType.equals(ExpressionLanguageTypes.NUMBER)) {
+            return NUMBER_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.STRING)) {
+            return STRING_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.ID)) {
+            return IDENTIFIER_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.TRUE)) {
+            return KEYWORD_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.FALSE)) {
+            return KEYWORD_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.NULL)) {
+            return KEYWORD_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.OP_IN)) {
+            return KEYWORD_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.OP_NOT_IN)) {
+            return KEYWORD_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.OP_MATCHES)) {
+            return KEYWORD_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.OP_AND_KW)) {
+            return KEYWORD_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.OP_OR_KW)) {
+            return KEYWORD_KEYS;
+        } else if (tokenType.equals(ExpressionLanguageTypes.OP_NOT_KW)) {
+            return KEYWORD_KEYS;
+        }
+
+        return EMPTY_KEYS;
+    }
+}

src/main/java/fr/adrienbrault/idea/symfony2plugin/expressionLanguage/ExpressionLanguageSyntaxHighlighterFactory.java

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+package fr.adrienbrault.idea.symfony2plugin.expressionLanguage;
+
+import com.intellij.openapi.fileTypes.SyntaxHighlighter;
+import com.intellij.openapi.fileTypes.SyntaxHighlighterFactory;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class ExpressionLanguageSyntaxHighlighterFactory extends SyntaxHighlighterFactory {
+
+    @NotNull
+    @Override
+    public SyntaxHighlighter getSyntaxHighlighter(@Nullable Project project, @Nullable VirtualFile virtualFile) {
+        return new ExpressionLanguageSyntaxHighlighter();
+    }
+}