> localVarTranslations,
TemplateAliases functionAliases,
GenJsExprsVisitor genJsExprsVisitor,
ErrorReporter errorReporter) {
super(master, jsSrcOptions, jsExprTranslator, genCallCodeUtils, isComputableAsJsExprsVisitor,
jsCodeBuilder, localVarTranslations, functionAliases, genJsExprsVisitor, errorReporter);
}
@Override
public String generateMsgGroupVariable(MsgFallbackGroupNode node) {
throw new IllegalStateException(
"This class should only be used for via the new idom entry-point.");
}
/**
* Generates idom instructions that output the contents of a translated message as HTML.
* For example:
*
* {msg desc="Says hello to a person."}Hello {$name}!{/msg}
*
* compiles to
*
* /** @desc Says hello to a person. *{@literal /}
* var MSG_EXTERNAL_6936162475751860807 = goog.getMsg(
* 'Hello {$name}!',
* {'name': '\u00010\u0001'});
* var lastIndex_1153 = 0, partRe_1153 = /\x01\d+\x01/g, match_1153;
* do {
* match_1153 = partRe_1153.exec(MSG_EXTERNAL_6936162475751860807) || undefined;
* itext(goog.string.unescapeEntities(MSG_EXTERNAL_6936162475751860807.substring(lastIndex_1153, match_1153 && match_1153.index)));
* lastIndex_1153 = partRe_1153.lastIndex;
* switch (match_1153 && match_1153[0]) {
* case '\u00010\u0001':
* var dyn8 = opt_data.name;
* if (typeof dyn8 == 'function') dyn8(); else if (dyn8 != null) itext(dyn8);
* break;
* }
* } while (match_1153);
*
* Each interpolated MsgPlaceholderNode (either for HTML tags or for print statements) compiles to
* a separate {@code case} statement.
*/
void generateMsgGroupCode(MsgFallbackGroupNode node) {
Preconditions.checkState(placeholderNames.isEmpty(), "This class is not reusable.");
// Non-HTML {msg}s should be extracted into LetContentNodes and handled by jssrc.
Preconditions.checkArgument(node.getHtmlContext() == HtmlContext.HTML_PCDATA,
"AssistantForHtmlMsgs is only for HTML {msg}s.");
// All of these helper variables must have uniquely-suffixed names because {msg}s can be nested.
// It'd be nice to move this codegen to a Soy template...
// The raw translated text, with placeholder placeholders.
String translationVar = super.generateMsgGroupVariable(node);
// If there are no placeholders, we don't need anything special (but we still need to unescape).
if (placeholderNames.isEmpty()) {
jsCodeBuilder.appendLine("itext(goog.string.unescapeEntities(", translationVar, "));");
return;
}
// The mutable (tracking index of last match) regex to find the placeholder placeholders.
String regexVar = "partRe_" + node.getId();
// The current placeholder placeholder from the regex.
String matchVar = "match_" + node.getId();
// The index of the end of the previous placeholder, where the next raw text run starts.
String lastIndexVar = "lastIndex_" + node.getId();
// Declare everything.
jsCodeBuilder.appendLineStart("var ", lastIndexVar, " = 0, ");
jsCodeBuilder.appendLineEnd(regexVar, " = ", PLACEHOLDER_REGEX, ", ", matchVar, ";");
// For each placeholder.
jsCodeBuilder.appendLine("do {");
jsCodeBuilder.increaseIndent();
// Find the placeholder.
jsCodeBuilder.appendLine(matchVar, " = ", regexVar,
".exec(", translationVar, ") || undefined;");
// Replace null with undefined. This is necessary to make substring() treat falsy as an omitted
// parameter, so that it goes until the end of the string. Otherwise, the non-numeric parameter
// would be coerced to zero.
// Emit the (possibly-empty) run of raw text since the last placeholder, until this placeholder,
// or until the end of the source string.
jsCodeBuilder.appendLine("itext(goog.string.unescapeEntities(", translationVar,
".substring(", lastIndexVar, ", ", matchVar, " && ", matchVar, ".index)));");
jsCodeBuilder.appendLine(lastIndexVar, " = ", regexVar, ".lastIndex;");
// Handle the actual placeholder.
jsCodeBuilder.appendLine("switch (", matchVar, " && ", matchVar, "[0]) {");
jsCodeBuilder.increaseIndent();
for (Map.Entry ph : placeholderNames.entrySet()) {
jsCodeBuilder.appendLine("case ", BaseUtils.escapeToSoyString(ph.getKey(), true), ":");
jsCodeBuilder.increaseIndent();
master.visitForUseByAssistants(ph.getValue());
jsCodeBuilder.appendLine("break;");
jsCodeBuilder.decreaseIndent();
}
jsCodeBuilder.decreaseIndent();
jsCodeBuilder.appendLine("}");
jsCodeBuilder.decreaseIndent();
jsCodeBuilder.appendLine("} while (", matchVar, ");");
}
@Override
protected JsExpr genGoogMsgPlaceholderExpr(MsgPlaceholderNode msgPhNode) {
// Mark the node so we know what instructions to emit.
String name = PLACEHOLDER_WRAPPER + placeholderNames.size() + PLACEHOLDER_WRAPPER;
placeholderNames.put(name, msgPhNode);
// Return the marker string to insert into the translated text.
return new JsExpr(BaseUtils.escapeToSoyString(name, true), Integer.MAX_VALUE);
}
}