/*
* Copyright 2012 The Closure Compiler Authors.
*
* 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.javascript.jscomp;
import com.google.common.collect.Lists;
import com.google.javascript.rhino.IR;
import com.google.javascript.rhino.Node;
import com.google.javascript.rhino.Token;
import java.util.Collections;
import java.util.List;
/**
* Replaces user-visible messages with appropriate calls to
* chrome.i18n.getMessage. The first argument to getMessage is the id of the
* message, as a string. If the message contains placeholders, the second
* argument is an array of the values being used for the placeholders, sorted
* by placeholder name.
*
* @author tbreisacher@google.com (Tyler Breisacher)
*/
class ReplaceMessagesForChrome extends JsMessageVisitor {
ReplaceMessagesForChrome(AbstractCompiler compiler,
JsMessage.IdGenerator idGenerator,
boolean checkDuplicatedMessages, JsMessage.Style style) {
super(compiler, checkDuplicatedMessages, style, idGenerator);
}
private static Node getChromeI18nGetMessageNode(String messageId) {
Node chromeI18n = IR.getprop(IR.name("chrome"), IR.string("i18n"));
Node getMessage = IR.getprop(chromeI18n, IR.string("getMessage"));
return IR.call(getMessage, IR.string(messageId));
}
@Override
protected void processJsMessage(
JsMessage message, JsMessageDefinition definition) {
try {
Node msgNode = definition.getMessageNode();
Node newValue = getNewValueNode(msgNode, message);
newValue.copyInformationFromForTree(msgNode);
msgNode.getParent().replaceChild(msgNode, newValue);
compiler.reportCodeChange();
} catch (MalformedException e) {
compiler.report(JSError.make(e.getNode(),
MESSAGE_TREE_MALFORMED, e.getMessage()));
}
}
private Node getNewValueNode(Node origNode, JsMessage message)
throws MalformedException {
Node newValueNode = getChromeI18nGetMessageNode(message.getId());
if (!message.placeholders().isEmpty()) {
Node placeholderValues = origNode.getLastChild();
checkNode(placeholderValues, Token.OBJECTLIT);
// Output the placeholders, sorted alphabetically by placeholder name,
// regardless of what order they appear in the original message.
List<String> placeholderNames = Lists.newArrayList(message.placeholders());
Collections.sort(placeholderNames);
Node placeholderValueArray = IR.arraylit();
for (String name : placeholderNames) {
Node value = getPlaceholderValue(placeholderValues, name);
if (value == null) {
throw new MalformedException(
"No value was provided for placeholder " + name,
origNode);
}
placeholderValueArray.addChildToBack(value);
}
newValueNode.addChildToBack(placeholderValueArray);
}
newValueNode.copyInformationFromForTree(origNode);
return newValueNode;
}
private static Node getPlaceholderValue(
Node placeholderValues, String placeholderName) {
for (Node key : placeholderValues.children()) {
if (key.getString().equals(placeholderName)) {
return key.getFirstChild().cloneTree();
}
}
return null;
}
}