blob: cb1891e75f858da050668efdb2d26ff5c1f0de77 [file] [log] [blame]
// Copyright (C) 2016 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 net.codemirror.addon;
import com.google.gwt.safehtml.shared.SafeUri;
import com.google.gwt.user.client.rpc.AsyncCallback;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.codemirror.lib.Loader;
public class AddonInjector {
private static final Map<String, SafeUri> addonUris = new HashMap<>();
static {
addonUris.put(Addons.I.merge_bundled().getName(), Addons.I.merge_bundled().getSafeUri());
}
public static SafeUri getAddonScriptUri(String addon) {
return addonUris.get(addon);
}
private static boolean canLoad(String addon) {
return getAddonScriptUri(addon) != null;
}
private final Set<String> loading = new HashSet<>();
private int pending;
private AsyncCallback<Void> appCallback;
public AddonInjector add(String name) {
if (name == null) {
return this;
}
if (!canLoad(name)) {
Logger.getLogger("net.codemirror")
.log(Level.WARNING, "CodeMirror addon " + name + " not configured.");
return this;
}
loading.add(name);
return this;
}
public void inject(AsyncCallback<Void> appCallback) {
this.appCallback = appCallback;
for (String addon : loading) {
beginLoading(addon);
}
if (pending == 0) {
appCallback.onSuccess(null);
}
}
private void beginLoading(String addon) {
pending++;
Loader.injectScript(
getAddonScriptUri(addon),
new AsyncCallback<Void>() {
@Override
public void onSuccess(Void result) {
pending--;
if (pending == 0) {
appCallback.onSuccess(null);
}
}
@Override
public void onFailure(Throwable caught) {
if (--pending == 0) {
appCallback.onFailure(caught);
}
}
});
}
}