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Side by Side Diff: chrome/tools/profile_reset/jtl_parser.h

Issue 271673006: Eliminate all code related to the AutomaticProfileResetter. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Fixed nit from dbeam@, using new tracked preference deprecation. Created 6 years, 4 months ago
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1 // Copyright 2013 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 CHROME_TOOLS_PROFILE_RESET_JTL_PARSER_H_
6 #define CHROME_TOOLS_PROFILE_RESET_JTL_PARSER_H_
7
8 #include <string>
9 #include <vector>
10
11 #include "base/basictypes.h"
12 #include "base/memory/scoped_ptr.h"
13 #include "base/values.h"
14
15 // Parses text-based JTL source code into a stream of operation names, arguments
16 // and separator kinds.
17 class JtlParser {
18 public:
19 // Creates a new parser to parse |compacted_source_code|, which should already
20 // be stripped of all comments and whitespace (except inside string literals).
21 // Use RemoveCommentsAndAllWhitespace() to manufacture these arguments, also
22 // see its comments for a description of |newline_indices|.
23 JtlParser(const std::string& compacted_source_code,
24 const std::vector<size_t>& newline_indices);
25 ~JtlParser();
26
27 // Removes comments from |verbose_text| and compacts it into whitespace-free
28 // format (except inside string literals). Elements in |newline_indices| will
29 // be monotonically increasing and will refer to positions in |compacted_text|
30 // such that a new line has been removed before that position.
31 // Example:
32 // verbose_text = "H e l l o // my\n"
33 // " dear \n"
34 // "\n"
35 // "world\" ! \""
36 // compacted_text = "Hellodearworld\" ! \""
37 // 01234567890123...
38 // newline_indices = {5, 9, 9}
39 // Returns true on success, false if there were unmatched quotes in a line, in
40 // which case |error_line_number| will be set accordingly if it is non-NULL.
41 static bool RemoveCommentsAndAllWhitespace(
42 const std::string& verbose_text,
43 std::string* compacted_text,
44 std::vector<size_t>* newline_indices,
45 size_t* error_line_number);
46
47 // Returns true if the entire input has been successfully consumed. Note that
48 // even when this returns false, a subsequent call to ParseNextOperation()
49 // might still fail if the next operation cannot be parsed.
50 bool HasFinished();
51
52 // Fetches the |name| and the |argument_list| of the next operation, and also
53 // whether or not it |ends_the_sentence|, i.e. it is followed by the
54 // end-of-sentence separator.
55 // Returns false if there is a parsing error, in which case the values for the
56 // output parameters are undefined, and |this| parser shall no longer be used.
57 bool ParseNextOperation(std::string* name,
58 base::ListValue* argument_list,
59 bool* ends_the_sentence);
60
61 // Returns the compacted source code that was passed in to the constructor.
62 const std::string& compacted_source() const { return compacted_source_; }
63
64 // Returns at which line the character at position |compacted_index| in the
65 // |compacted_source()| was originally located.
66 size_t GetOriginalLineNumber(size_t compacted_index) const;
67
68 size_t GetLastLineNumber() const;
69 std::string GetLastContext() const;
70
71 private:
72 // Contains pre-compiled regular expressions and related state. Factored out
73 // to avoid this header depending on RE2 headers.
74 struct ParsingState;
75
76 std::string compacted_source_;
77 std::vector<size_t> newline_indices_;
78 scoped_ptr<ParsingState> state_;
79
80 DISALLOW_COPY_AND_ASSIGN(JtlParser);
81 };
82
83 #endif // CHROME_TOOLS_PROFILE_RESET_JTL_PARSER_H_
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