MultiMarkdownFxPreviewEditorProvider.java

/*
 * Copyright (c) 2015-2015 Vladimir Schneider <vladimir.schneider@gmail.com>
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 *
 * This file is based on the IntelliJ SimplePlugin tutorial
 *
 */
package com.vladsch.idea.multimarkdown.editor;

//import com.intellij.ide.scratch.ScratchFileService;

import com.intellij.openapi.editor.Document;
import com.intellij.openapi.fileEditor.*;
import com.intellij.openapi.project.PossiblyDumbAware;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.vladsch.idea.multimarkdown.MultiMarkdownLanguage;
import com.vladsch.idea.multimarkdown.settings.FailedBuildRunnable;
import com.vladsch.idea.multimarkdown.settings.MultiMarkdownGlobalSettings;
import javafx.application.Platform;
import org.jdom.Element;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.lang.reflect.Constructor;

public class MultiMarkdownFxPreviewEditorProvider implements FileEditorProvider, PossiblyDumbAware {
    private static final org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(MultiMarkdownFxPreviewEditorProvider.class);

    private static final int FX_PREVIEW_UNKNOWN = 0;
    private static final int FX_PREVIEW_HAVE_JAR = 1;
    private static final int FX_PREVIEW_CAN_LOAD = 2;
    private static final int FX_PREVIEW_CANNOT_LOAD = 3;

    public static final String EDITOR_TYPE_ID = MultiMarkdownLanguage.NAME + "FxPreviewEditor";
    private static int canLoadFxEditor = FX_PREVIEW_UNKNOWN;
    private static Class<?> MultiMarkdownFxPreviewEditor;
    private static Constructor<?> classConstructor;

    public static boolean accept(@NotNull VirtualFile file) {
        return MultiMarkdownPreviewEditorProvider.accept(file);
    }

    public boolean accept(@NotNull Project project, @NotNull VirtualFile file) {
        return accept(file);
    }

    @NotNull
    @Override
    public FileEditor createEditor(@NotNull Project project, @NotNull VirtualFile file) {
        return createEditor(project, file, false);
    }

    @NotNull
    public static FileEditor createEditor(@NotNull final Project project, @NotNull final VirtualFile file, final boolean forRawHtml) {
        final Document document = FileDocumentManager.getInstance().getDocument(file);
        assert document != null;

        if (!MultiMarkdownGlobalSettings.getInstance().useOldPreview.getValue()) {
            return MultiMarkdownGlobalSettings.getInstance().fxPreviewFailedBuild.runBuild(new FailedBuildRunnable<FileEditor>() {
                @Nullable @Override public FileEditor runCanFail() throws Throwable {
                    MultiMarkdownGlobalSettings.getInstance().setIsFxHtmlPreview(true);
                    boolean isFxApplicationThread = Platform.isFxApplicationThread();
                    return new MultiMarkdownFxPreviewEditor(project, document, forRawHtml);
                }

                @Nullable @Override public FileEditor run() {
                    MultiMarkdownGlobalSettings.getInstance().setIsFxHtmlPreview(false);
                    MultiMarkdownGlobalSettings.getInstance().useOldPreview.setValue(true);
                    return new MultiMarkdownPreviewEditor(project, document, forRawHtml);
                }
            });
        }
        return new MultiMarkdownPreviewEditor(project, document, forRawHtml);
    }

    public void disposeEditor(@NotNull FileEditor editor) {
        editor.dispose();
    }

    @NotNull
    @Override
    public FileEditorState readState(@NotNull Element sourceElement, @NotNull Project project, @NotNull VirtualFile file) {
        return FileEditorState.INSTANCE;
    }

    @Override
    public void writeState(@NotNull FileEditorState state, @NotNull Project project, @NotNull Element targetElement) {
    }

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

    @NotNull
    @Override
    public FileEditorPolicy getPolicy() {
        return FileEditorPolicy.PLACE_AFTER_DEFAULT_EDITOR;
    }

    @Override
    public boolean isDumbAware() {
        return true;
    }
}