blob: 0fc275846022b2e4637d4c70e36c6c962ad12ffd [file] [log] [blame]
// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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.google.gitiles.doc;
import static java.util.stream.Collectors.toSet;
import com.google.common.base.CharMatcher;
import com.google.common.base.Splitter;
import com.google.gitiles.doc.html.HtmlBuilder;
import com.google.template.soy.shared.internal.Sanitizers;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.commonmark.node.Heading;
import org.commonmark.node.Node;
import org.eclipse.jgit.util.RawParseUtils;
class Navbar {
private static final Pattern META_LINK =
Pattern.compile(
"^\\[(logo|home|extensions)\\]:\\s*(.+)$", Pattern.MULTILINE | Pattern.CASE_INSENSITIVE);
private static final Pattern EXTENSIONS_LINK =
Pattern.compile("^\\[extensions\\]:\\s*(.+)$", Pattern.MULTILINE | Pattern.CASE_INSENSITIVE);
private MarkdownConfig cfg;
private MarkdownToHtml fmt;
private Node node;
private String siteTitle;
private String logoUrl;
private String homeUrl;
Navbar() {}
MarkdownConfig getConfig() {
return cfg;
}
Navbar setConfig(MarkdownConfig cfg) {
this.cfg = cfg;
return this;
}
Navbar setFormatter(MarkdownToHtml html) {
this.fmt = html;
return this;
}
Navbar setMarkdown(byte[] md) {
if (md != null && md.length > 0) {
parse(RawParseUtils.decode(md));
}
return this;
}
Map<String, Object> toSoyData() {
Map<String, Object> data = new HashMap<>();
data.put("siteTitle", siteTitle);
data.put("logoUrl", logo());
data.put("homeUrl", homeUrl != null ? fmt.href(homeUrl) : null);
data.put("navbarHtml", node != null ? fmt.toSoyHtml(node) : null);
return data;
}
private Object logo() {
if (logoUrl == null) {
return null;
}
String url = fmt.image(logoUrl);
if (HtmlBuilder.isValidHttpUri(url)) {
return url;
} else if (HtmlBuilder.isImageDataUri(url)) {
return Sanitizers.filterImageDataUri(url);
} else {
return SoyConstants.IMAGE_URI_INNOCUOUS_OUTPUT;
}
}
private void parse(String markdown) {
String md = extractMetadata(markdown);
node = GitilesMarkdown.parse(cfg, md);
extractSiteTitle();
}
private void extractSiteTitle() {
for (Node c = node.getFirstChild(); c != null; c = c.getNext()) {
if (c instanceof Heading) {
Heading h = (Heading) c;
if (h.getLevel() == 1) {
siteTitle = MarkdownUtil.getInnerText(h);
h.unlink();
break;
}
}
}
}
private String extractMetadata(String markdown) {
boolean extensionsFound = false;
Matcher m = META_LINK.matcher(markdown);
while (m.find()) {
String key = m.group(1).toLowerCase();
String url = m.group(2).trim();
switch (key) {
case "logo":
logoUrl = url;
break;
case "home":
homeUrl = url;
break;
case "extensions":
extensionsFound = true;
Set<String> names = splitExtensionNames(url);
cfg = cfg.copyWithExtensions(enabled(names), disabled(names));
break;
}
}
if (extensionsFound) {
return EXTENSIONS_LINK.matcher(markdown).replaceAll("");
}
return markdown;
}
private static Set<String> splitExtensionNames(String url) {
return Splitter.on(CharMatcher.whitespace().or(CharMatcher.is(','))).trimResults()
.omitEmptyStrings().splitToList(url).stream()
.map(String::toLowerCase)
.collect(toSet());
}
private static Set<String> enabled(Set<String> names) {
return names.stream().filter(n -> !n.startsWith("!")).collect(toSet());
}
private static Set<String> disabled(Set<String> names) {
return names.stream().filter(n -> n.startsWith("!")).map(n -> n.substring(1)).collect(toSet());
}
}