| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // 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. |
| |
| #ifndef COBALT_BASE_SOURCE_LOCATION_H_ |
| #define COBALT_BASE_SOURCE_LOCATION_H_ |
| |
| #include "base/logging.h" |
| |
| #include <string> |
| |
| namespace base { |
| |
| // Used by CSS and HTML parsers to define location in a source file. |
| // |
| // If file path cannot be determined, provide a name of Web API object |
| // which triggered the parsing, in the form of "[object ClassName]" (this |
| // matches JavaScript's toString() format for objects). |
| // |
| // For example, a list of CSS declarations assigned to HTMLElement.style |
| // should have a |file_path| set to "[object CSSStyleDeclaration]", where |
| // CSSStyleDeclaration is the type of HTMLElement.style property. |
| // |
| // Line and column numbers are 1-based. |
| struct SourceLocation { |
| SourceLocation(const std::string& file_path, int line_number, |
| int column_number) |
| : file_path(file_path), |
| line_number(line_number), |
| column_number(column_number) { |
| DCHECK_GE(line_number, 1); |
| DCHECK_GE(column_number, 1); |
| } |
| |
| std::string file_path; |
| int line_number; |
| int column_number; |
| }; |
| |
| // Offsets the location within embedded source relatively to the start |
| // of embedded source. |
| // |
| // Line and column numbers are 1-based. |
| inline void AdjustForStartLocation(int start_line_number, |
| int start_column_number, int* line_number, |
| int* column_number) { |
| DCHECK_GE(start_line_number, 1); |
| DCHECK_GE(start_column_number, 1); |
| DCHECK(line_number); |
| DCHECK(column_number); |
| DCHECK_GE(*line_number, 1); |
| DCHECK_GE(*column_number, 1); |
| |
| *column_number += *line_number == 1 ? start_column_number - 1 : 0; |
| *line_number += start_line_number - 1; |
| } |
| |
| } // namespace base |
| |
| #endif // COBALT_BASE_SOURCE_LOCATION_H_ |