1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
// Copyright 2016 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 "components/autofill/core/browser/legal_message_line.h"
#include "base/i18n/message_formatter.h"
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
namespace autofill {
namespace {
// Replace "{0}", "{1}", ... in |template_icu| with corresponding strings
// from |display_texts|. Sets |out_message| to the resulting string, with
// start position of each replacement in |out_offsets|.
// Return false on failure. If false is returned then contents of |out_message|
// and |out_offsets| are undefined.
bool ReplaceTemplatePlaceholders(
const base::string16& template_icu,
const std::vector<base::string16>& display_texts,
base::string16* out_message,
std::vector<size_t>* out_offsets) {
// Escape "$" -> "$$" for ReplaceStringPlaceholders().
//
// Edge cases:
// 1. Two or more consecutive $ characters will be incorrectly expanded
// ("$$" -> "$$$$", which ReplaceStringPlaceholders() then turns into
// "$$$").
//
// 2. "${" will cause false to be returned. "${0}" will expand to "$${0}".
// FormatWithNumberedArgs() turns it into "$$$1", which
// ReplaceStringPlaceholders() then turns into "$$1" without doing the
// parameter replacement. This causes false to be returned because each
// parameter is not used exactly once.
//
// Both of these cases are noted in the header file, and are unlikely to
// occur in any actual legal message.
base::string16 template_icu_escaped;
base::ReplaceChars(template_icu, base::ASCIIToUTF16("$"),
base::ASCIIToUTF16("$$"), &template_icu_escaped);
// Replace "{0}" -> "$1", "{1}" -> "$2", ... to prepare |template_dollars|
// for ReplaceStringPlaceholders().
base::string16 template_dollars =
base::i18n::MessageFormatter::FormatWithNumberedArgs(
template_icu_escaped, "$1", "$2", "$3", "$4", "$5", "$6", "$7");
// FormatWithNumberedArgs() returns an empty string on failure.
if (template_dollars.empty() && !template_icu.empty())
return false;
// Replace "$1", "$2", ... with the display text of each parameter.
*out_message = base::ReplaceStringPlaceholders(template_dollars,
display_texts, out_offsets);
// Each parameter must be used exactly once. If a parameter is unused or
// used more than once then it can't be determined which |offsets| entry
// corresponds to which parameter.
return out_offsets->size() == display_texts.size();
}
} // namespace
LegalMessageLine::Link::Link(size_t start,
size_t end,
const std::string& url_spec)
: range(start, end), url(url_spec) {}
LegalMessageLine::Link::~Link() {}
LegalMessageLine::LegalMessageLine() {}
LegalMessageLine::LegalMessageLine(const LegalMessageLine& other) = default;
LegalMessageLine::~LegalMessageLine() {}
// static
bool LegalMessageLine::Parse(const base::DictionaryValue& legal_message,
LegalMessageLines* out) {
const base::ListValue* lines_list = nullptr;
if (legal_message.GetList("line", &lines_list)) {
LegalMessageLines lines;
lines.reserve(lines_list->GetSize());
for (size_t i = 0; i < lines_list->GetSize(); ++i) {
lines.emplace_back(LegalMessageLine());
const base::DictionaryValue* single_line;
if (!lines_list->GetDictionary(i, &single_line) ||
!lines.back().ParseLine(*single_line))
return false;
}
out->swap(lines);
}
return true;
}
bool LegalMessageLine::ParseLine(const base::DictionaryValue& line) {
DCHECK(text_.empty());
DCHECK(links_.empty());
// |display_texts| elements are the strings that will be substituted for
// "{0}", "{1}", etc. in the template string.
std::vector<base::string16> display_texts;
// Process all the template parameters.
const base::ListValue* template_parameters = nullptr;
if (line.GetList("template_parameter", &template_parameters)) {
display_texts.resize(template_parameters->GetSize());
links_.reserve(template_parameters->GetSize());
for (size_t parameter_index = 0;
parameter_index < template_parameters->GetSize(); ++parameter_index) {
const base::DictionaryValue* single_parameter;
std::string url;
if (!template_parameters->GetDictionary(parameter_index,
&single_parameter) ||
!single_parameter->GetString("display_text",
&display_texts[parameter_index]) ||
!single_parameter->GetString("url", &url))
return false;
links_.emplace_back(0, 0, url);
}
}
// Read the template string. It's a small subset of the ICU message format
// syntax.
base::string16 template_icu;
if (!line.GetString("template", &template_icu))
return false;
// Replace the placeholders in |template_icu| with strings from
// |display_texts|, and store the start position of each replacement in
// |offsets|.
std::vector<size_t> offsets;
if (!ReplaceTemplatePlaceholders(template_icu, display_texts, &text_,
&offsets))
return false;
// Fill in range values for all links.
for (size_t offset_index = 0; offset_index < offsets.size(); ++offset_index) {
size_t range_start = offsets[offset_index];
links_[offset_index].range = gfx::Range(
range_start, range_start + display_texts[offset_index].size());
}
return true;
}
} // namespace autofill
|
