| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/base/template_expressions.h" |
| |
| #include <stddef.h> |
| |
| #include "base/logging.h" |
| #include "base/stl_util.h" |
| #include "base/values.h" |
| #include "net/base/escape.h" |
| |
| namespace { |
| const char kLeader[] = "$i18n"; |
| const size_t kLeaderSize = base::size(kLeader) - 1; |
| const char kKeyOpen = '{'; |
| const char kKeyClose = '}'; |
| |
| // Escape quotes and backslashes ('"\). |
| std::string PolymerParameterEscape(const std::string& in_string) { |
| std::string out; |
| out.reserve(in_string.size() * 2); |
| for (const char c : in_string) { |
| switch (c) { |
| case '\\': |
| out.append("\\\\"); |
| break; |
| case '\'': |
| out.append("\\'"); |
| break; |
| case '"': |
| out.append("""); |
| break; |
| case ',': |
| out.append("\\,"); |
| break; |
| default: |
| out += c; |
| } |
| } |
| return out; |
| } |
| |
| } // namespace |
| |
| namespace ui { |
| |
| void TemplateReplacementsFromDictionaryValue( |
| const base::DictionaryValue& dictionary, |
| TemplateReplacements* replacements) { |
| for (base::DictionaryValue::Iterator it(dictionary); !it.IsAtEnd(); |
| it.Advance()) { |
| if (it.value().is_string()) { |
| std::string str_value; |
| if (it.value().GetAsString(&str_value)) |
| (*replacements)[it.key()] = str_value; |
| } |
| } |
| } |
| |
| std::string ReplaceTemplateExpressions( |
| base::StringPiece source, |
| const TemplateReplacements& replacements) { |
| std::string formatted; |
| const size_t kValueLengthGuess = 16; |
| formatted.reserve(source.length() + replacements.size() * kValueLengthGuess); |
| // Two position markers are used as cursors through the |source|. |
| // The |current_pos| will follow behind |next_pos|. |
| size_t current_pos = 0; |
| while (true) { |
| size_t next_pos = source.find(kLeader, current_pos); |
| |
| if (next_pos == std::string::npos) { |
| source.substr(current_pos).AppendToString(&formatted); |
| break; |
| } |
| |
| source.substr(current_pos, next_pos - current_pos) |
| .AppendToString(&formatted); |
| current_pos = next_pos + kLeaderSize; |
| |
| size_t context_end = source.find(kKeyOpen, current_pos); |
| CHECK_NE(context_end, std::string::npos); |
| std::string context; |
| source.substr(current_pos, context_end - current_pos) |
| .AppendToString(&context); |
| current_pos = context_end + sizeof(kKeyOpen); |
| |
| size_t key_end = source.find(kKeyClose, current_pos); |
| CHECK_NE(key_end, std::string::npos); |
| |
| std::string key = |
| source.substr(current_pos, key_end - current_pos).as_string(); |
| CHECK(!key.empty()); |
| |
| auto value = replacements.find(key); |
| CHECK(value != replacements.end()) << "$i18n replacement key \"" << key |
| << "\" not found"; |
| |
| std::string replacement = value->second; |
| if (context.empty()) { |
| // Make the replacement HTML safe. |
| replacement = net::EscapeForHTML(replacement); |
| } else if (context == "Raw") { |
| // Pass the replacement through unchanged. |
| } else if (context == "Polymer") { |
| // Escape quotes and backslash for '$i18nPolymer{}' use (i.e. quoted). |
| replacement = PolymerParameterEscape(replacement); |
| } else { |
| CHECK(false) << "Unknown context " << context; |
| } |
| |
| formatted.append(replacement); |
| |
| current_pos = key_end + sizeof(kKeyClose); |
| } |
| return formatted; |
| } |
| |
| } // namespace ui |