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// Protocol Buffers - Google's data interchange format // Copyright 2008 Google Inc. All rights reserved. // https://developers.google.com/protocol-buffers/ // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following disclaimer // in the documentation and/or other materials provided with the // distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Author: [email protected] (Kenton Varda) // Based on original Protocol Buffers design by // Sanjay Ghemawat, Jeff Dean, and others. #include <google/protobuf/compiler/java/java_doc_comment.h> #include <vector> #include <google/protobuf/io/printer.h> #include <google/protobuf/stubs/strutil.h> namespace google { namespace protobuf { namespace compiler { namespace java { string EscapeJavadoc(const string& input) { string result; result.reserve(input.size() * 2); char prev = '*'; for (string::size_type i = 0; i < input.size(); i++) { char c = input[i]; switch (c) { case '*': // Avoid "/*". if (prev == '/') { result.append("*"); } else { result.push_back(c); } break; case '/': // Avoid "*/". if (prev == '*') { result.append("/"); } else { result.push_back(c); } break; case '@': // '@' starts javadoc tags including the @deprecated tag, which will // cause a compile-time error if inserted before a declaration that // does not have a corresponding @Deprecated annotation. result.append("@"); break; case '<': // Avoid interpretation as HTML. result.append("<"); break; case '>': // Avoid interpretation as HTML. result.append(">"); break; case '&': // Avoid interpretation as HTML. result.append("&"); break; case '\\': // Java interprets Unicode escape sequences anywhere! result.append("\"); break; default: result.push_back(c); break; } prev = c; } return result; } static void WriteDocCommentBodyForLocation( io::Printer* printer, const SourceLocation& location) { string comments = location.leading_comments.empty() ? location.trailing_comments : location.leading_comments; if (!comments.empty()) { // TODO(kenton): Ideally we should parse the comment text as Markdown and // write it back as HTML, but this requires a Markdown parser. For now // we just use <pre> to get fixed-width text formatting. // If the comment itself contains block comment start or end markers, // HTML-escape them so that they don't accidentally close the doc comment. comments = EscapeJavadoc(comments); std::vector<string> lines = Split(comments, "\n"); while (!lines.empty() && lines.back().empty()) { lines.pop_back(); } printer->Print(" * <pre>\n"); for (int i = 0; i < lines.size(); i++) { // Most lines should start with a space. Watch out for lines that start // with a /, since putting that right after the leading asterisk will // close the comment. if (!lines[i].empty() && lines[i][0] == '/') { printer->Print(" * $line$\n", "line", lines[i]); } else { printer->Print(" *$line$\n", "line", lines[i]); } } printer->Print( " * </pre>\n" " *\n"); } } template <typename DescriptorType> static void WriteDocCommentBody( io::Printer* printer, const DescriptorType* descriptor) { SourceLocation location; if (descriptor->GetSourceLocation(&location)) { WriteDocCommentBodyForLocation(printer, location); } } static string FirstLineOf(const string& value) { string result = value; string::size_type pos = result.find_first_of('\n'); if (pos != string::npos) { result.erase(pos); } // If line ends in an opening brace, make it "{ ... }" so it looks nice. if (!result.empty() && result[result.size() - 1] == '{') { result.append(" ... }"); } return result; } void WriteMessageDocComment(io::Printer* printer, const Descriptor* message) { printer->Print("/**\n"); WriteDocCommentBody(printer, message); printer->Print( " * Protobuf type {@code $fullname$}\n" " */\n", "fullname", EscapeJavadoc(message->full_name())); } void WriteFieldDocComment(io::Printer* printer, const FieldDescriptor* field) { // In theory we should have slightly different comments for setters, getters, // etc., but in practice everyone already knows the difference between these // so it's redundant information. // We start the comment with the main body based on the comments from the // .proto file (if present). We then end with the field declaration, e.g.: // optional string foo = 5; // If the field is a group, the debug string might end with {. printer->Print("/**\n"); WriteDocCommentBody(printer, field); printer->Print( " * <code>$def$</code>\n", "def", EscapeJavadoc(FirstLineOf(field->DebugString()))); printer->Print(" */\n"); } void WriteEnumDocComment(io::Printer* printer, const EnumDescriptor* enum_) { printer->Print("/**\n"); WriteDocCommentBody(printer, enum_); printer->Print( " * Protobuf enum {@code $fullname$}\n" " */\n", "fullname", EscapeJavadoc(enum_->full_name())); } void WriteEnumValueDocComment(io::Printer* printer, const EnumValueDescriptor* value) { printer->Print("/**\n"); WriteDocCommentBody(printer, value); printer->Print( " * <code>$def$</code>\n" " */\n", "def", EscapeJavadoc(FirstLineOf(value->DebugString()))); } void WriteServiceDocComment(io::Printer* printer, const ServiceDescriptor* service) { printer->Print("/**\n"); WriteDocCommentBody(printer, service); printer->Print( " * Protobuf service {@code $fullname$}\n" " */\n", "fullname", EscapeJavadoc(service->full_name())); } void WriteMethodDocComment(io::Printer* printer, const MethodDescriptor* method) { printer->Print("/**\n"); WriteDocCommentBody(printer, method); printer->Print( " * <code>$def$</code>\n" " */\n", "def", EscapeJavadoc(FirstLineOf(method->DebugString()))); } } // namespace java } // namespace compiler } // namespace protobuf } // namespace google