HbTemplateHighlighter.java example

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intellij-plugins-master
package com.dmarcotte.handlebars;

import com.dmarcotte.handlebars.parsing.HbTokenTypes;
import com.intellij.lang.Language;
import com.intellij.openapi.editor.colors.EditorColorsScheme;
import com.intellij.openapi.editor.ex.util.LayerDescriptor;
import com.intellij.openapi.editor.ex.util.LayeredLexerEditorHighlighter;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.fileTypes.StdFileTypes;
import com.intellij.openapi.fileTypes.SyntaxHighlighter;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.templateLanguages.TemplateDataLanguageMappings;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class HbTemplateHighlighter extends LayeredLexerEditorHighlighter {
  public HbTemplateHighlighter(@Nullable Project project, @Nullable VirtualFile virtualFile, @NotNull EditorColorsScheme colors) {
    // create main highlighter
    super(new HbHighlighter(), colors);

    // highlighter for outer lang
    FileType type = null;
    if (project == null || virtualFile == null) {
      type = StdFileTypes.PLAIN_TEXT;
    }
    else {
      Language language = TemplateDataLanguageMappings.getInstance(project).getMapping(virtualFile);
      if (language != null) type = language.getAssociatedFileType();
      if (type == null) type = HbLanguage.getDefaultTemplateLang();
    }
    @SuppressWarnings("deprecation") // deprecated in IDEA 12, still needed in IDEA 11 TODO remove when IDEA 11 support is dropped
      SyntaxHighlighter outerHighlighter = SyntaxHighlighter.PROVIDER.create(type, project, virtualFile);

    registerLayer(HbTokenTypes.CONTENT, new LayerDescriptor(outerHighlighter, ""));
  }
}