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
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
#include "ui/theme.h"
#include "core/log.h"
#include <algorithm>
#include <array>
#include <cctype>
#include <charconv>
#include <cstdint>
#include <fstream>
#include <string>
#include <string_view>
#include <unordered_map>
namespace Hsdbg
{
namespace
{
// a deliberately small TOML reader: enough for theme files (tables, one key
// per line, strings / numbers / bools / arrays, inline comments) without a
// dependency; anything unrecognised keeps the default
auto trim(std::string_view text) -> std::string_view
{
while (!text.empty() && std::isspace(static_cast<unsigned char>(text.front())))
text.remove_prefix(1);
while (!text.empty() && std::isspace(static_cast<unsigned char>(text.back())))
text.remove_suffix(1);
return text;
}
// drop a trailing "# comment", but only when the '#' sits outside a
// quoted string, so a hex colour like "#88C0D0" survives
auto strip_comment(std::string_view line) -> std::string_view
{
bool in_quote = false;
for (size_t i = 0; i < line.size(); ++i)
{
if (line[i] == '"')
in_quote = !in_quote;
else if (line[i] == '#' && !in_quote)
return line.substr(0, i);
}
return line;
}
auto unquote(std::string_view value) -> std::string_view
{
if (value.size() >= 2 && value.front() == '"' && value.back() == '"')
return value.substr(1, value.size() - 2);
return value;
}
auto hex_pair(std::string_view text) -> float
{
int value = 0;
std::from_chars(text.data(), text.data() + text.size(), value, 16);
return static_cast<float>(value) / 255.0f;
}
// "#rgb", "#rrggbb" or "#rrggbbaa", or an array "[r, g, b(, a)]" of
// floats in 0..1; anything else leaves the fallback in place
auto parse_color(std::string_view value, ImVec4 fallback) -> ImVec4
{
value = trim(unquote(trim(value)));
if (value.empty())
return fallback;
if (value.front() == '#')
{
value.remove_prefix(1);
ImVec4 out = fallback;
out.w = 1.0f;
if (value.size() == 3)
{
const auto nibble = [&](size_t i) {
const char pair[2] = { value[i], value[i] };
return hex_pair(std::string_view(pair, 2));
};
out.x = nibble(0);
out.y = nibble(1);
out.z = nibble(2);
return out;
}
if (value.size() == 6 || value.size() == 8)
{
out.x = hex_pair(value.substr(0, 2));
out.y = hex_pair(value.substr(2, 2));
out.z = hex_pair(value.substr(4, 2));
if (value.size() == 8)
out.w = hex_pair(value.substr(6, 2));
return out;
}
return fallback;
}
if (value.front() == '[')
{
value.remove_prefix(1);
if (!value.empty() && value.back() == ']')
value.remove_suffix(1);
std::array<float, 4> parts = { fallback.x, fallback.y, fallback.z, 1.0f };
size_t count = 0;
while (!value.empty() && count < parts.size())
{
const size_t comma = value.find(',');
const std::string_view token = trim(value.substr(0, comma));
float parsed = parts[count];
std::from_chars(token.data(), token.data() + token.size(), parsed);
parts[count++] = parsed;
if (comma == std::string_view::npos)
break;
value.remove_prefix(comma + 1);
}
if (count >= 3)
return ImVec4(parts[0], parts[1], parts[2], parts[3]);
}
return fallback;
}
auto parse_float(std::string_view value, float fallback) -> float
{
value = trim(unquote(trim(value)));
float parsed = fallback;
std::from_chars(value.data(), value.data() + value.size(), parsed);
return parsed;
}
using Section = std::unordered_map<std::string, std::string>;
using Document = std::unordered_map<std::string, Section>;
auto parse_document(const std::filesystem::path& path, Document& out) -> bool
{
std::ifstream file(path);
if (!file.is_open())
return false;
std::string current;
std::string line;
while (std::getline(file, line))
{
std::string_view view = trim(strip_comment(line));
if (view.empty())
continue;
if (view.front() == '[')
{
const size_t close = view.find(']');
if (close != std::string_view::npos)
current = std::string(trim(view.substr(1, close - 1)));
continue;
}
const size_t equals = view.find('=');
if (equals == std::string_view::npos)
continue;
const std::string key(trim(view.substr(0, equals)));
const std::string value(trim(view.substr(equals + 1)));
out[current][key] = value;
}
return true;
}
auto lookup(const Document& doc, std::string_view section, std::string_view key)
-> const std::string*
{
const auto s = doc.find(std::string(section));
if (s == doc.end())
return nullptr;
const auto k = s->second.find(std::string(key));
return k == s->second.end() ? nullptr : &k->second;
}
}
auto default_theme() -> Theme
{
return Theme{};
}
auto load_theme(const std::filesystem::path& path) -> Theme
{
Theme theme = default_theme();
Document doc;
if (!parse_document(path, doc))
{
Log::warn("theme: could not read '{}'", path.string());
return theme;
}
if (const std::string* name = lookup(doc, "theme", "name"))
theme.name = std::string(unquote(trim(*name)));
const auto color = [&](const char* section, const char* key, ImVec4& field) {
if (const std::string* value = lookup(doc, section, key))
field = parse_color(*value, field);
};
color("palette", "text", theme.text);
color("palette", "text_dim", theme.text_dim);
color("palette", "bg", theme.bg);
color("palette", "bg_low", theme.bg_low);
color("palette", "bg_high", theme.bg_high);
color("palette", "surface", theme.surface);
color("palette", "border", theme.border);
color("palette", "accent", theme.accent);
if (const std::string* value = lookup(doc, "style", "rounding"))
theme.rounding = parse_float(*value, theme.rounding);
if (const std::string* value = lookup(doc, "style", "window_border"))
theme.window_border = parse_float(*value, theme.window_border);
color("syntax", "keyword", theme.syntax_keyword);
color("syntax", "type", theme.syntax_type);
color("syntax", "string", theme.syntax_string);
color("syntax", "number", theme.syntax_number);
color("syntax", "comment", theme.syntax_comment);
color("syntax", "preprocessor", theme.syntax_preprocessor);
color("syntax", "current_line", theme.current_line);
return theme;
}
auto list_themes(const std::filesystem::path& dir) -> std::vector<ThemeEntry>
{
std::vector<ThemeEntry> entries;
std::error_code error;
if (!std::filesystem::is_directory(dir, error))
return entries;
for (const auto& item : std::filesystem::directory_iterator(dir, error))
{
if (!item.is_regular_file() || item.path().extension() != ".toml")
continue;
// the display name lives in the file; read just that rather than the
// full palette, since the picker only needs a label
Document doc;
std::string name = item.path().stem().string();
if (parse_document(item.path(), doc))
{
if (const std::string* value = lookup(doc, "theme", "name"))
name = std::string(unquote(trim(*value)));
}
entries.push_back(ThemeEntry{ item.path().stem().string(), std::move(name), item.path() });
}
std::sort(entries.begin(), entries.end(),
[](const ThemeEntry& a, const ThemeEntry& b) { return a.name < b.name; });
return entries;
}
}
|
