xml/impl/src/com/intellij/ide/browsers/impl/WebBrowserServiceImpl.java

/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * 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.intellij.ide.browsers.impl;

import com.intellij.ide.browsers.OpenInBrowserRequest;
import com.intellij.ide.browsers.WebBrowserService;
import com.intellij.ide.browsers.WebBrowserUrlProvider;
import com.intellij.lang.Language;
import com.intellij.lang.html.HTMLLanguage;
import com.intellij.lang.xhtml.XHTMLLanguage;
import com.intellij.lang.xml.XMLLanguage;
import com.intellij.openapi.project.DumbService;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.impl.http.HttpVirtualFile;
import com.intellij.psi.PsiElement;
import com.intellij.testFramework.LightVirtualFile;
import com.intellij.util.Url;
import com.intellij.util.Urls;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.xml.util.HtmlUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Collection;
import java.util.Collections;

public class WebBrowserServiceImpl extends WebBrowserService {
  public static boolean isHtmlOrXmlFile(@NotNull PsiElement element) {
    Language language = element.getLanguage();
    return language == HTMLLanguage.INSTANCE || language == XHTMLLanguage.INSTANCE || language == XMLLanguage.INSTANCE;
  }

  @NotNull
  @Override
  public Collection<Url> getUrlsToOpen(@NotNull OpenInBrowserRequest request, boolean preferLocalUrl) throws WebBrowserUrlProvider.BrowserException {
    VirtualFile virtualFile = request.getVirtualFile();
    if (virtualFile instanceof HttpVirtualFile) {
      return Collections.singleton(Urls.newFromVirtualFile(virtualFile));
    }

    if (!preferLocalUrl || !isHtmlOrXmlFile(request.getFile())) {
      WebBrowserUrlProvider provider = getProvider(request);
      if (provider != null) {
        if (request.getResult() != null) {
          return request.getResult();
        }

        try {
          Collection<Url> urls = provider.getUrls(request);
          if (!urls.isEmpty()) {
            return urls;
          }
        }
        catch (WebBrowserUrlProvider.BrowserException e) {
          if (!HtmlUtil.isHtmlFile(request.getFile())) {
            throw e;
          }
        }
      }
    }
    return virtualFile instanceof LightVirtualFile || !request.getFile().getViewProvider().isPhysical() ? Collections.<Url>emptySet() : Collections.singleton(Urls.newFromVirtualFile(virtualFile));
  }

  @Nullable
  public static WebBrowserUrlProvider getProvider(@NotNull OpenInBrowserRequest request) {
    DumbService dumbService = DumbService.getInstance(request.getProject());
    for (WebBrowserUrlProvider urlProvider : WebBrowserUrlProvider.EP_NAME.getExtensions()) {
      if ((!dumbService.isDumb() || DumbService.isDumbAware(urlProvider)) && urlProvider.canHandleElement(request)) {
        return urlProvider;
      }
    }
    return null;
  }

  @Nullable
  public static Url getUrlForContext(@NotNull PsiElement sourceElement) {
    Url url;
    try {
      Collection<Url> urls = WebBrowserService.getInstance().getUrlsToOpen(sourceElement, false);
      url = ContainerUtil.getFirstItem(urls);
      if (url == null) {
        return null;
      }
    }
    catch (WebBrowserUrlProvider.BrowserException ignored) {
      return null;
    }

    VirtualFile virtualFile = sourceElement.getContainingFile().getVirtualFile();
    if (virtualFile == null) {
      return null;
    }

    return !url.isInLocalFileSystem() || HtmlUtil.isHtmlFile(virtualFile) ? url : null;
  }
}