com.android.tools.idea.uibuilder.editor.NlEditorProvider.java Source code

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Here is the source code for com.android.tools.idea.uibuilder.editor.NlEditorProvider.java

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/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.tools.idea.uibuilder.editor;

import com.android.tools.idea.AndroidPsiUtils;
import com.android.tools.idea.project.FeatureEnableService;
import com.android.tools.idea.uibuilder.model.NlLayoutType;
import com.intellij.openapi.fileEditor.FileEditor;
import com.intellij.openapi.fileEditor.FileEditorPolicy;
import com.intellij.openapi.fileEditor.FileEditorProvider;
import com.intellij.openapi.project.DumbAware;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiFile;
import com.intellij.psi.xml.XmlFile;
import org.jetbrains.android.facet.AndroidFacet;
import org.jetbrains.android.uipreview.AndroidEditorSettings;
import org.jetbrains.annotations.NotNull;

public class NlEditorProvider implements FileEditorProvider, DumbAware {
    /**
     * FileEditorProvider ID for the layout editor
     */
    public static final String DESIGNER_ID = "android-designer2";

    @Override
    public boolean accept(@NotNull Project project, @NotNull VirtualFile file) {
        PsiFile psiFile = AndroidPsiUtils.getPsiFileSafely(project, file);
        if (!(psiFile instanceof XmlFile) || AndroidFacet.getInstance(psiFile) == null) {
            return false;
        }

        FeatureEnableService featureEnableService = FeatureEnableService.getInstance(project);
        if (featureEnableService == null || !featureEnableService.isLayoutEditorEnabled(project)) {
            return false;
        }

        return NlLayoutType.supports((XmlFile) psiFile);
    }

    @NotNull
    @Override
    public FileEditor createEditor(@NotNull Project project, @NotNull VirtualFile file) {
        PsiFile psiFile = AndroidPsiUtils.getPsiFileSafely(project, file);
        AndroidFacet facet = psiFile instanceof XmlFile ? AndroidFacet.getInstance(psiFile) : null;
        assert facet != null; // checked by accept
        return new NlEditor(facet, file, project);
    }

    @NotNull
    @Override
    public String getEditorTypeId() {
        return DESIGNER_ID;
    }

    @NotNull
    @Override
    public FileEditorPolicy getPolicy() {
        return AndroidEditorSettings.getInstance().getGlobalState().isPreferXmlEditor()
                ? FileEditorPolicy.PLACE_AFTER_DEFAULT_EDITOR
                : FileEditorPolicy.PLACE_BEFORE_DEFAULT_EDITOR;
    }
}