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
|
// From rust:
/* global resourcesSuffix */
var darkThemes = ["dark", "ayu"];
window.currentTheme = document.getElementById("themeStyle");
window.mainTheme = document.getElementById("mainThemeStyle");
var settingsDataset = (function () {
var settingsElement = document.getElementById("default-settings");
if (settingsElement === null) {
return null;
}
var dataset = settingsElement.dataset;
if (dataset === undefined) {
return null;
}
return dataset;
})();
function getSettingValue(settingName) {
var current = getCurrentValue('rustdoc-' + settingName);
if (current !== null) {
return current;
}
if (settingsDataset !== null) {
// See the comment for `default_settings.into_iter()` etc. in
// `Options::from_matches` in `librustdoc/config.rs`.
var def = settingsDataset[settingName.replace(/-/g,'_')];
if (def !== undefined) {
return def;
}
}
return null;
}
var localStoredTheme = getSettingValue("theme");
var savedHref = [];
// eslint-disable-next-line no-unused-vars
function hasClass(elem, className) {
return elem && elem.classList && elem.classList.contains(className);
}
// eslint-disable-next-line no-unused-vars
function addClass(elem, className) {
if (!elem || !elem.classList) {
return;
}
elem.classList.add(className);
}
// eslint-disable-next-line no-unused-vars
function removeClass(elem, className) {
if (!elem || !elem.classList) {
return;
}
elem.classList.remove(className);
}
function onEach(arr, func, reversed) {
if (arr && arr.length > 0 && func) {
var length = arr.length;
var i;
if (reversed) {
for (i = length - 1; i >= 0; --i) {
if (func(arr[i])) {
return true;
}
}
} else {
for (i = 0; i < length; ++i) {
if (func(arr[i])) {
return true;
}
}
}
}
return false;
}
function onEachLazy(lazyArray, func, reversed) {
return onEach(
Array.prototype.slice.call(lazyArray),
func,
reversed);
}
// eslint-disable-next-line no-unused-vars
function hasOwnPropertyRustdoc(obj, property) {
return Object.prototype.hasOwnProperty.call(obj, property);
}
function updateLocalStorage(name, value) {
try {
window.localStorage.setItem(name, value);
} catch(e) {
// localStorage is not accessible, do nothing
}
}
function getCurrentValue(name) {
try {
return window.localStorage.getItem(name);
} catch(e) {
return null;
}
}
function switchTheme(styleElem, mainStyleElem, newTheme, saveTheme) {
var fullBasicCss = "rustdoc" + resourcesSuffix + ".css";
var fullNewTheme = newTheme + resourcesSuffix + ".css";
var newHref = mainStyleElem.href.replace(fullBasicCss, fullNewTheme);
// If this new value comes from a system setting or from the previously
// saved theme, no need to save it.
if (saveTheme) {
updateLocalStorage("rustdoc-theme", newTheme);
}
if (styleElem.href === newHref) {
return;
}
var found = false;
if (savedHref.length === 0) {
onEachLazy(document.getElementsByTagName("link"), function(el) {
savedHref.push(el.href);
});
}
onEach(savedHref, function(el) {
if (el === newHref) {
found = true;
return true;
}
});
if (found) {
styleElem.href = newHref;
}
}
// This function is called from "main.js".
// eslint-disable-next-line no-unused-vars
function useSystemTheme(value) {
if (value === undefined) {
value = true;
}
updateLocalStorage("rustdoc-use-system-theme", value);
// update the toggle if we're on the settings page
var toggle = document.getElementById("use-system-theme");
if (toggle && toggle instanceof HTMLInputElement) {
toggle.checked = value;
}
}
var updateSystemTheme = (function() {
if (!window.matchMedia) {
// fallback to the CSS computed value
return function() {
var cssTheme = getComputedStyle(document.documentElement)
.getPropertyValue('content');
switchTheme(
window.currentTheme,
window.mainTheme,
JSON.parse(cssTheme) || "light",
true
);
};
}
// only listen to (prefers-color-scheme: dark) because light is the default
var mql = window.matchMedia("(prefers-color-scheme: dark)");
function handlePreferenceChange(mql) {
// maybe the user has disabled the setting in the meantime!
if (getSettingValue("use-system-theme") !== "false") {
var lightTheme = getSettingValue("preferred-light-theme") || "light";
var darkTheme = getSettingValue("preferred-dark-theme") || "dark";
if (mql.matches) {
// prefers a dark theme
switchTheme(window.currentTheme, window.mainTheme, darkTheme, true);
} else {
// prefers a light theme, or has no preference
switchTheme(window.currentTheme, window.mainTheme, lightTheme, true);
}
// note: we save the theme so that it doesn't suddenly change when
// the user disables "use-system-theme" and reloads the page or
// navigates to another page
}
}
mql.addListener(handlePreferenceChange);
return function() {
handlePreferenceChange(mql);
};
})();
if (getSettingValue("use-system-theme") !== "false" && window.matchMedia) {
// update the preferred dark theme if the user is already using a dark theme
// See https://github.com/rust-lang/rust/pull/77809#issuecomment-707875732
if (getSettingValue("use-system-theme") === null
&& getSettingValue("preferred-dark-theme") === null
&& darkThemes.indexOf(localStoredTheme) >= 0) {
updateLocalStorage("rustdoc-preferred-dark-theme", localStoredTheme);
}
// call the function to initialize the theme at least once!
updateSystemTheme();
} else {
switchTheme(
window.currentTheme,
window.mainTheme,
getSettingValue("theme") || "light",
false
);
}
|
