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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
#include "StarAssetPath.hpp"
#include "StarLexicalCast.hpp"
namespace Star {
// The filename is everything after the last slash (excluding directives) and
// up to the first directive marker.
static Maybe<pair<size_t, size_t>> findFilenameRange(std::string const& pathUtf8) {
size_t firstDirectiveOrSubPath = pathUtf8.find_first_of(":?");
size_t filenameStart = 0;
while (true) {
size_t find = pathUtf8.find('/', filenameStart);
if (find >= firstDirectiveOrSubPath)
break;
filenameStart = find + 1;
}
if (filenameStart == NPos) {
return {};
} else if (firstDirectiveOrSubPath == NPos) {
return {{filenameStart, pathUtf8.size()}};
} else {
return {{filenameStart, firstDirectiveOrSubPath}};
}
}
AssetPath AssetPath::split(String const& path) {
auto i = path.begin();
auto end = path.end();
AssetPath components;
// base paths cannot have any ':' or '?' characters, stop at the first one.
while (i != end) {
String::Char c = *i;
if (c == ':' || c == '?')
break;
components.basePath += c;
++i;
}
// Sub-paths must immediately follow base paths and must start with a ':',
// after this point any further ':' characters are not special.
if (i != end && *i == ':') {
++i;
while (i != end) {
String::Char c = *i;
if (c == '?')
break;
if (!components.subPath)
components.subPath.emplace();
*components.subPath += c;
++i;
}
}
// Directives must follow the base path and optional sub-path, and each
// directive is separated by one or more '?' characters.
while (i != end && *i == '?') {
String directives;
while (i != end) {
directives.append(*i);
++i;
}
if (!directives.empty());
components.directives.append(move(directives));
}
starAssert(i == end);
return components;
}
String AssetPath::join(AssetPath const& components) {
return toString(components);
}
String AssetPath::setSubPath(String const& path, String const& subPath) {
auto components = split(path);
components.subPath = subPath;
return join(components);
}
String AssetPath::removeSubPath(String const& path) {
auto components = split(path);
components.subPath.reset();
return join(components);
}
String AssetPath::getDirectives(String const& path) {
size_t firstDirective = path.find('?');
if (firstDirective == NPos)
return {};
return path.substr(firstDirective + 1);
}
String AssetPath::addDirectives(String const& path, String const& directives) {
return String::joinWith("?", path, directives);
}
String AssetPath::removeDirectives(String const& path) {
size_t firstDirective = path.find('?');
if (firstDirective == NPos)
return path;
return path.substr(0, firstDirective);
}
String AssetPath::directory(String const& path) {
if (auto p = findFilenameRange(path.utf8())) {
return String(path.utf8().substr(0, p->first));
} else {
return String();
}
}
String AssetPath::filename(String const& path) {
if (auto p = findFilenameRange(path.utf8())) {
return String(path.utf8().substr(p->first, p->second));
} else {
return String();
}
}
String AssetPath::extension(String const& path) {
auto file = filename(path);
auto lastDot = file.findLast(".");
if (lastDot == NPos)
return "";
return file.substr(lastDot + 1);
}
String AssetPath::relativeTo(String const& sourcePath, String const& givenPath) {
if (!givenPath.empty() && givenPath[0] == '/')
return givenPath;
auto path = directory(sourcePath);
path.append(givenPath);
return path;
}
bool AssetPath::operator==(AssetPath const& rhs) const {
return tie(basePath, subPath, directives) == tie(rhs.basePath, rhs.subPath, rhs.directives);
}
AssetPath::AssetPath(String const& path) {
*this = move(AssetPath::split(path)); // split code should probably be in here, but whatever
}
std::ostream& operator<<(std::ostream& os, AssetPath const& rhs) {
os << rhs.basePath;
if (rhs.subPath) {
os << ":";
os << *rhs.subPath;
}
rhs.directives.forEach([&](ImageOperation const& operation, String const& string) {
os << "?";
os << string;
});
return os;
}
}
|