| OLD | NEW |
| (Empty) |
| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef COMPONENTS_AUTOFILL_BROWSER_AUTOFILL_SCANNER_H_ | |
| 6 #define COMPONENTS_AUTOFILL_BROWSER_AUTOFILL_SCANNER_H_ | |
| 7 | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/strings/string16.h" | |
| 12 | |
| 13 namespace autofill { | |
| 14 | |
| 15 class AutofillField; | |
| 16 | |
| 17 // A helper class for parsing a stream of |AutofillField|'s with lookahead. | |
| 18 class AutofillScanner { | |
| 19 public: | |
| 20 explicit AutofillScanner(const std::vector<const AutofillField*>& fields); | |
| 21 ~AutofillScanner(); | |
| 22 | |
| 23 // Advances the cursor by one step, if possible. | |
| 24 void Advance(); | |
| 25 | |
| 26 // Returns the current field in the stream, or |NULL| if there are no more | |
| 27 // fields in the stream. | |
| 28 const AutofillField* Cursor() const; | |
| 29 | |
| 30 // Returns |true| if the cursor has reached the end of the stream. | |
| 31 bool IsEnd() const; | |
| 32 | |
| 33 // Restores the most recently saved cursor. See also |SaveCursor()|. | |
| 34 void Rewind(); | |
| 35 | |
| 36 // Repositions the cursor to the specified |index|. See also |SaveCursor()|. | |
| 37 void RewindTo(size_t index); | |
| 38 | |
| 39 // Saves and returns the current cursor position. See also |Rewind()| and | |
| 40 // |RewindTo()|. | |
| 41 size_t SaveCursor(); | |
| 42 | |
| 43 private: | |
| 44 // Indicates the current position in the stream, represented as a vector. | |
| 45 std::vector<const AutofillField*>::const_iterator cursor_; | |
| 46 | |
| 47 // The most recently saved cursor. | |
| 48 std::vector<const AutofillField*>::const_iterator saved_cursor_; | |
| 49 | |
| 50 // The beginning pointer for the stream. | |
| 51 const std::vector<const AutofillField*>::const_iterator begin_; | |
| 52 | |
| 53 // The past-the-end pointer for the stream. | |
| 54 const std::vector<const AutofillField*>::const_iterator end_; | |
| 55 | |
| 56 DISALLOW_COPY_AND_ASSIGN(AutofillScanner); | |
| 57 }; | |
| 58 | |
| 59 } // namespace autofill | |
| 60 | |
| 61 #endif // COMPONENTS_AUTOFILL_BROWSER_AUTOFILL_SCANNER_H_ | |
| OLD | NEW |