blob: 02faccbb50a7f4517e4fd148ef55e1be1e82eea2 [file] [log] [blame]
// Copyright (C) 2013 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.lib;
import com.google.gwt.core.client.JsArrayString;
import com.google.gwt.resources.client.DataResource;
import com.google.gwt.safehtml.shared.SafeUri;
import com.google.gwt.user.client.rpc.AsyncCallback;
import net.codemirror.mode.Modes;
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;
public class ModeInjector {
/** Map of server content type to CodeMiror mode or content type. */
private static final Map<String, String> mimeAlias;
/** Map of content type "text/x-java" to mode name "clike". */
private static final Map<String, String> mimeModes;
/** Map of names such as "clike" to URI for code download. */
private static final Map<String, SafeUri> modeUris;
static {
DataResource[] all = {
Modes.I.clike(),
Modes.I.clojure(),
Modes.I.commonlisp(),
Modes.I.css(),
Modes.I.go(),
Modes.I.groovy(),
Modes.I.htmlmixed(),
Modes.I.javascript(),
Modes.I.perl(),
Modes.I.properties(),
Modes.I.python(),
Modes.I.ruby(),
Modes.I.shell(),
Modes.I.sql(),
Modes.I.velocity(),
Modes.I.xml(),
};
mimeAlias = new HashMap<>();
mimeModes = new HashMap<>();
modeUris = new HashMap<>();
for (DataResource m : all) {
modeUris.put(m.getName(), m.getSafeUri());
}
parseModeMap();
}
private static void parseModeMap() {
String mode = null;
for (String line : Modes.I.mode_map().getText().split("\n")) {
int eq = line.indexOf('=');
if (0 < eq) {
mimeAlias.put(
line.substring(0, eq).trim(),
line.substring(eq + 1).trim());
} else if (line.endsWith(":")) {
String n = line.substring(0, line.length() - 1);
if (modeUris.containsKey(n)) {
mode = n;
}
} else if (mode != null && line.contains("/")) {
mimeModes.put(line, mode);
} else {
mode = null;
}
}
}
public static String getContentType(String mode) {
String real = mode != null ? mimeAlias.get(mode) : null;
return real != null ? real : mode;
}
private static native boolean isModeLoaded(String n)
/*-{ return $wnd.CodeMirror.modes.hasOwnProperty(n); }-*/;
private static native boolean isMimeLoaded(String n)
/*-{ return $wnd.CodeMirror.mimeModes.hasOwnProperty(n); }-*/;
private static native JsArrayString getDependencies(String n)
/*-{ return $wnd.CodeMirror.modes[n].dependencies || []; }-*/;
private final Set<String> loading = new HashSet<>(4);
private int pending;
private AsyncCallback<Void> appCallback;
public ModeInjector add(String name) {
if (name == null || isModeLoaded(name) || isMimeLoaded(name)) {
return this;
}
String mode = mimeModes.get(name);
if (mode == null) {
mode = name;
}
SafeUri uri = modeUris.get(mode);
if (uri == null) {
Logger.getLogger("net.codemirror").log(
Level.WARNING,
"CodeMirror mode " + mode + " not configured.");
return this;
}
loading.add(mode);
return this;
}
public void inject(AsyncCallback<Void> appCallback) {
this.appCallback = appCallback;
for (String mode : loading) {
beginLoading(mode);
}
if (pending == 0) {
appCallback.onSuccess(null);
}
}
private void beginLoading(final String mode) {
pending++;
Loader.injectScript(
modeUris.get(mode),
new AsyncCallback<Void>() {
@Override
public void onSuccess(Void result) {
pending--;
ensureDependenciesAreLoaded(mode);
if (pending == 0) {
appCallback.onSuccess(null);
}
}
@Override
public void onFailure(Throwable caught) {
if (--pending == 0) {
appCallback.onFailure(caught);
}
}
});
}
private void ensureDependenciesAreLoaded(String mode) {
JsArrayString deps = getDependencies(mode);
for (int i = 0; i < deps.length(); i++) {
String d = deps.get(i);
if (loading.contains(d) || isModeLoaded(d)) {
continue;
}
SafeUri uri = modeUris.get(d);
if (uri == null) {
Logger.getLogger("net.codemirror").log(
Level.SEVERE,
"CodeMirror mode " + mode + " needs " + d);
continue;
}
loading.add(d);
beginLoading(d);
}
}
}