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// Copyright 2008 Google Inc.
//
// 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.gerrit.client.ui;
import com.google.gwt.core.client.GWT;
/** Utilities for dealing with the DOM. */
public abstract class DomUtil {
private static final Impl INSTANCE;
static {
if (GWT.isClient())
INSTANCE = new ClientImpl();
else
INSTANCE = new JavaImpl();
}
/** Escape XML/HTML special characters in the input string. */
public static String escape(final String in) {
return INSTANCE.escape(in);
}
/** Convert bare URLs into <a href> tags. */
public static String linkify(final String in) {
return INSTANCE.linkify(in);
}
/** Do wiki style formatting to make it pretty */
public static String wikify(String in) {
in = INSTANCE.escape(in);
in = INSTANCE.linkify(in);
in = INSTANCE.wikify(in);
return in;
}
private DomUtil() {
}
private static abstract class Impl {
abstract String escape(String in);
String wikify(String s) {
s = s.replaceAll("(^|\n)([ \t][^\n]*)", "$1<span class=\"gerrit-preformat\">$2</span><br />");
s = s.replaceAll("\n\n", "<p>\n");
return s;
}
String linkify(String in) {
return in.replaceAll("(https?://[^ \n\r\t]*)", "<a href=\"$1\">$1</a>");
}
}
private static class ClientImpl extends Impl {
@Override
native String escape(String src)/*-{ return src.replace(/&/g,'&').replace(/>/g,'>').replace(/</g,'<').replace(/"/g,'"'); }-*/;
}
private static class JavaImpl extends Impl {
@Override
String escape(final String in) {
final StringBuilder r = new StringBuilder(in.length());
for (int i = 0; i < in.length(); i++) {
final char c = in.charAt(i);
switch (c) {
case '&':
r.append("&");
break;
case '>':
r.append(">");
break;
case '<':
r.append("<");
break;
case '"':
r.append(""");
break;
default:
r.append(c);
}
}
return r.toString();
}
}
}
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