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
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

use dom_struct::dom_struct;
use net_traits::request::Referrer;
use script_traits::{HistoryEntryReplacement, LoadData, LoadOrigin};
use servo_url::{MutableOrigin, ServoUrl};

use crate::dom::bindings::codegen::Bindings::LocationBinding::LocationMethods;
use crate::dom::bindings::codegen::Bindings::WindowBinding::Window_Binding::WindowMethods;
use crate::dom::bindings::error::{Error, ErrorResult, Fallible};
use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::bindings::str::USVString;
use crate::dom::document::Document;
use crate::dom::globalscope::GlobalScope;
use crate::dom::urlhelper::UrlHelper;
use crate::dom::window::Window;
use crate::script_runtime::CanGc;

#[derive(PartialEq)]
pub enum NavigationType {
    /// The "[`Location`-object navigate][1]" steps.
    ///
    /// [1]: https://html.spec.whatwg.org/multipage/#location-object-navigate
    Normal,

    /// The last step of [`reload()`][1] (`reload_triggered == true`)
    ///
    /// [1]: https://html.spec.whatwg.org/multipage/#dom-location-reload
    ReloadByScript,

    /// User-requested navigation (the unlabeled paragraph after
    /// [`reload()`][1]).
    ///
    /// [1]: https://html.spec.whatwg.org/multipage/#dom-location-reload
    ReloadByConstellation,

    /// Reload triggered by a [declarative refresh][1].
    ///
    /// [1]: https://html.spec.whatwg.org/multipage/#shared-declarative-refresh-steps
    DeclarativeRefresh,
}

#[dom_struct]
pub struct Location {
    reflector_: Reflector,
    window: Dom<Window>,
}

impl Location {
    fn new_inherited(window: &Window) -> Location {
        Location {
            reflector_: Reflector::new(),
            window: Dom::from_ref(window),
        }
    }

    pub fn new(window: &Window) -> DomRoot<Location> {
        reflect_dom_object(Box::new(Location::new_inherited(window)), window)
    }

    /// Navigate the relevant `Document`'s browsing context.
    pub fn navigate(
        &self,
        url: ServoUrl,
        replacement_flag: HistoryEntryReplacement,
        navigation_type: NavigationType,
        can_gc: CanGc,
    ) {
        fn incumbent_window() -> DomRoot<Window> {
            let incumbent_global = GlobalScope::incumbent().expect("no incumbent global object");
            DomRoot::downcast(incumbent_global).expect("global object is not a Window")
        }

        // The active document of the source browsing context used for
        // navigation determines the request's referrer and referrer policy.
        let source_window = match navigation_type {
            NavigationType::ReloadByScript |
            NavigationType::ReloadByConstellation |
            NavigationType::DeclarativeRefresh => {
                // > Navigate the browsing context [...] the source browsing context
                // > set to the browsing context being navigated.
                DomRoot::from_ref(&*self.window)
            },
            NavigationType::Normal => {
                // > 2. Let `sourceBrowsingContext` be the incumbent global object's
                // >    browsing context.
                incumbent_window()
            },
        };
        let source_document = source_window.Document();

        let referrer = Referrer::ReferrerUrl(source_document.url());
        let referrer_policy = source_document.get_referrer_policy();

        // <https://html.spec.whatwg.org/multipage/#navigate>
        // > Let `incumbentNavigationOrigin` be the origin of the incumbent
        // > settings object, or if no script was involved, the origin of the
        // > node document of the element that initiated the navigation.
        let navigation_origin_window = match navigation_type {
            NavigationType::Normal | NavigationType::ReloadByScript => incumbent_window(),
            NavigationType::ReloadByConstellation | NavigationType::DeclarativeRefresh => {
                DomRoot::from_ref(&*self.window)
            },
        };
        let (load_origin, creator_pipeline_id) = (
            navigation_origin_window.origin().immutable().clone(),
            Some(navigation_origin_window.pipeline_id()),
        );

        // Is `historyHandling` `reload`?
        let reload_triggered = match navigation_type {
            NavigationType::ReloadByScript | NavigationType::ReloadByConstellation => true,
            NavigationType::Normal | NavigationType::DeclarativeRefresh => false,
        };

        // Initiate navigation
        // TODO: rethrow exceptions, set exceptions enabled flag.
        let load_data = LoadData::new(
            LoadOrigin::Script(load_origin),
            url,
            creator_pipeline_id,
            referrer,
            referrer_policy,
            None, // Top navigation doesn't inherit secure context
        );
        self.window
            .load_url(replacement_flag, reload_triggered, load_data, can_gc);
    }

    /// Get if this `Location`'s [relevant `Document`][1] is non-null.
    ///
    /// [1]: https://html.spec.whatwg.org/multipage/#relevant-document
    fn has_document(&self) -> bool {
        // <https://html.spec.whatwg.org/multipage/#relevant-document>
        //
        // > A `Location` object has an associated relevant `Document`, which is
        // > this `Location` object's relevant global object's browsing
        // > context's active document, if this `Location` object's relevant
        // > global object's browsing context is non-null, and null otherwise.
        self.window.Document().browsing_context().is_some()
    }

    /// Get this `Location` object's [relevant `Document`][1], or
    /// `Err(Error::Security)` if it's non-null and its origin is not same
    /// origin-domain with the entry setting object's origin.
    ///
    /// In the specification's terms:
    ///
    ///  1. If this `Location` object's relevant `Document` is null, then return
    ///     null.
    ///
    ///  2. If this `Location` object's relevant `Document`'s origin is not same
    ///     origin-domain with the entry settings object's origin, then throw a
    ///     "`SecurityError`" `DOMException`.
    ///
    ///  3. Return this `Location` object's relevant `Document`.
    ///
    /// [1]: https://html.spec.whatwg.org/multipage/#relevant-document
    fn document_if_same_origin(&self) -> Fallible<Option<DomRoot<Document>>> {
        // <https://html.spec.whatwg.org/multipage/#relevant-document>
        //
        // > A `Location` object has an associated relevant `Document`, which is
        // > this `Location` object's relevant global object's browsing
        // > context's active document, if this `Location` object's relevant
        // > global object's browsing context is non-null, and null otherwise.
        if let Some(window_proxy) = self.window.Document().browsing_context() {
            // `Location`'s many other operations:
            //
            // > If this `Location` object's relevant `Document` is non-null and
            // > its origin is not same origin-domain with the entry settings
            // > object's origin, then throw a "SecurityError" `DOMException`.
            //
            // FIXME: We should still return the active document if it's same
            //        origin but not fully active. `WindowProxy::document`
            //        currently returns `None` in this case.
            if let Some(document) = window_proxy.document().filter(|document| {
                self.entry_settings_object()
                    .origin()
                    .same_origin_domain(document.origin())
            }) {
                Ok(Some(document))
            } else {
                Err(Error::Security)
            }
        } else {
            // The browsing context is null
            Ok(None)
        }
    }

    /// Get this `Location` object's [relevant url][1] or
    /// `Err(Error::Security)` if the [relevant `Document`][2] if it's non-null
    /// and its origin is not same origin-domain with the entry setting object's
    /// origin.
    ///
    /// [1]: https://html.spec.whatwg.org/multipage/#concept-location-url
    /// [2]: https://html.spec.whatwg.org/multipage/#relevant-document
    fn get_url_if_same_origin(&self) -> Fallible<ServoUrl> {
        Ok(if let Some(document) = self.document_if_same_origin()? {
            document.url()
        } else {
            ServoUrl::parse("about:blank").unwrap()
        })
    }

    fn entry_settings_object(&self) -> DomRoot<GlobalScope> {
        GlobalScope::entry()
    }

    /// The common algorithm for `Location`'s setters and `Location::Assign`.
    #[inline]
    fn setter_common(
        &self,
        f: impl FnOnce(ServoUrl) -> Fallible<Option<ServoUrl>>,
        can_gc: CanGc,
    ) -> ErrorResult {
        // Step 1: If this Location object's relevant Document is null, then return.
        // Step 2: If this Location object's relevant Document's origin is not
        // same origin-domain with the entry settings object's origin, then
        // throw a "SecurityError" DOMException.
        if let Some(document) = self.document_if_same_origin()? {
            // Step 3: Let copyURL be a copy of this Location object's url.
            // Step 4: Assign the result of running f(copyURL) to copyURL.
            if let Some(copy_url) = f(document.url())? {
                // Step 5: Terminate these steps if copyURL is null.
                // Step 6: Location-object navigate to copyURL.
                self.navigate(
                    copy_url,
                    HistoryEntryReplacement::Disabled,
                    NavigationType::Normal,
                    can_gc,
                );
            }
        }
        Ok(())
    }

    /// Perform a user-requested reload (the unlabeled paragraph after
    /// [`reload()`][1]).
    ///
    /// [1]: https://html.spec.whatwg.org/multipage/#dom-location-reload
    pub fn reload_without_origin_check(&self, can_gc: CanGc) {
        // > When a user requests that the active document of a browsing context
        // > be reloaded through a user interface element, the user agent should
        // > navigate the browsing context to the same resource as that
        // > `Document`, with `historyHandling` set to "reload".
        let url = self.window.get_url();
        self.navigate(
            url,
            HistoryEntryReplacement::Enabled,
            NavigationType::ReloadByConstellation,
            can_gc,
        );
    }

    #[allow(dead_code)]
    pub fn origin(&self) -> &MutableOrigin {
        self.window.origin()
    }
}

impl LocationMethods for Location {
    // https://html.spec.whatwg.org/multipage/#dom-location-assign
    fn Assign(&self, url: USVString, can_gc: CanGc) -> ErrorResult {
        self.setter_common(
            |_copy_url| {
                // Step 3: Parse url relative to the entry settings object. If that failed,
                // throw a "SyntaxError" DOMException.
                let base_url = self.entry_settings_object().api_base_url();
                let url = match base_url.join(&url.0) {
                    Ok(url) => url,
                    Err(_) => return Err(Error::Syntax),
                };

                Ok(Some(url))
            },
            can_gc,
        )
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-reload
    fn Reload(&self, can_gc: CanGc) -> ErrorResult {
        let url = self.get_url_if_same_origin()?;
        self.navigate(
            url,
            HistoryEntryReplacement::Enabled,
            NavigationType::ReloadByScript,
            can_gc,
        );
        Ok(())
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-replace
    fn Replace(&self, url: USVString, can_gc: CanGc) -> ErrorResult {
        // Step 1: If this Location object's relevant Document is null, then return.
        if self.has_document() {
            // Step 2: Parse url relative to the entry settings object. If that failed,
            // throw a "SyntaxError" DOMException.
            let base_url = self.entry_settings_object().api_base_url();
            let url = match base_url.join(&url.0) {
                Ok(url) => url,
                Err(_) => return Err(Error::Syntax),
            };
            // Step 3: Location-object navigate to the resulting URL record with
            // the replacement flag set.
            self.navigate(
                url,
                HistoryEntryReplacement::Enabled,
                NavigationType::Normal,
                can_gc,
            );
        }
        Ok(())
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-hash
    fn GetHash(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Hash(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-hash
    fn SetHash(&self, value: USVString, can_gc: CanGc) -> ErrorResult {
        self.setter_common(
            |mut copy_url| {
                // Step 4: Let input be the given value with a single leading "#" removed, if any.
                // Step 5: Set copyURL's fragment to the empty string.
                // Step 6: Basic URL parse input, with copyURL as url and fragment state as
                // state override.
                let new_fragment = if value.0.starts_with('#') {
                    Some(&value.0[1..])
                } else {
                    Some(value.0.as_str())
                };
                // Step 7: If copyURL's fragment is this's url's fragment, then return.
                if copy_url.fragment() == new_fragment {
                    Ok(None)
                } else {
                    copy_url.as_mut_url().set_fragment(new_fragment);

                    Ok(Some(copy_url))
                }
            },
            can_gc,
        )
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-host
    fn GetHost(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Host(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-host
    fn SetHost(&self, value: USVString, can_gc: CanGc) -> ErrorResult {
        self.setter_common(
            |mut copy_url| {
                // Step 4: If copyURL's cannot-be-a-base-URL flag is set, terminate these steps.
                if copy_url.cannot_be_a_base() {
                    return Ok(None);
                }

                // Step 5: Basic URL parse the given value, with copyURL as url and host state
                // as state override.
                let _ = copy_url.as_mut_url().set_host(Some(&value.0));

                Ok(Some(copy_url))
            },
            can_gc,
        )
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-origin
    fn GetOrigin(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Origin(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-hostname
    fn GetHostname(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Hostname(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-hostname
    fn SetHostname(&self, value: USVString, can_gc: CanGc) -> ErrorResult {
        self.setter_common(
            |mut copy_url| {
                // Step 4: If copyURL's cannot-be-a-base-URL flag is set, terminate these steps.
                if copy_url.cannot_be_a_base() {
                    return Ok(None);
                }

                // Step 5: Basic URL parse the given value, with copyURL as url and hostname
                // state as state override.
                let _ = copy_url.as_mut_url().set_host(Some(&value.0));

                Ok(Some(copy_url))
            },
            can_gc,
        )
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-href
    fn GetHref(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Href(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-href
    fn SetHref(&self, value: USVString, can_gc: CanGc) -> ErrorResult {
        // Step 1: If this Location object's relevant Document is null, then return.
        if self.has_document() {
            // Note: no call to self.check_same_origin_domain()
            // Step 2: Parse the given value relative to the entry settings object.
            // If that failed, throw a TypeError exception.
            let base_url = self.entry_settings_object().api_base_url();
            let url = match base_url.join(&value.0) {
                Ok(url) => url,
                Err(e) => return Err(Error::Type(format!("Couldn't parse URL: {}", e))),
            };
            // Step 3: Location-object navigate to the resulting URL record.
            self.navigate(
                url,
                HistoryEntryReplacement::Disabled,
                NavigationType::Normal,
                can_gc,
            );
        }
        Ok(())
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-pathname
    fn GetPathname(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Pathname(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-pathname
    fn SetPathname(&self, value: USVString, can_gc: CanGc) -> ErrorResult {
        self.setter_common(
            |mut copy_url| {
                // Step 4: If copyURL's cannot-be-a-base-URL flag is set, terminate these steps.
                if copy_url.cannot_be_a_base() {
                    return Ok(None);
                }

                // Step 5: Set copyURL's path to the empty list.
                // Step 6: Basic URL parse the given value, with copyURL as url and path
                // start state as state override.
                copy_url.as_mut_url().set_path(&value.0);

                Ok(Some(copy_url))
            },
            can_gc,
        )
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-port
    fn GetPort(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Port(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-port
    fn SetPort(&self, value: USVString, can_gc: CanGc) -> ErrorResult {
        self.setter_common(
            |mut copy_url| {
                // Step 4: If copyURL cannot have a username/password/port, then return.
                // https://url.spec.whatwg.org/#cannot-have-a-username-password-port
                if copy_url.host().is_none() ||
                    copy_url.cannot_be_a_base() ||
                    copy_url.scheme() == "file"
                {
                    return Ok(None);
                }

                // Step 5: If the given value is the empty string, then set copyURL's
                // port to null.
                // Step 6: Otherwise, basic URL parse the given value, with copyURL as url
                // and port state as state override.
                let _ = url::quirks::set_port(copy_url.as_mut_url(), &value.0);

                Ok(Some(copy_url))
            },
            can_gc,
        )
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-protocol
    fn GetProtocol(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Protocol(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-protocol
    fn SetProtocol(&self, value: USVString, can_gc: CanGc) -> ErrorResult {
        self.setter_common(
            |mut copy_url| {
                // Step 4: Let possibleFailure be the result of basic URL parsing the given
                // value, followed by ":", with copyURL as url and scheme start state as
                // state override.
                let scheme = match value.0.find(':') {
                    Some(position) => &value.0[..position],
                    None => &value.0,
                };

                if copy_url.as_mut_url().set_scheme(scheme).is_err() {
                    // Step 5: If possibleFailure is failure, then throw a "SyntaxError" DOMException.
                    return Err(Error::Syntax);
                }

                // Step 6: If copyURL's scheme is not an HTTP(S) scheme, then terminate these steps.
                if !copy_url.scheme().eq_ignore_ascii_case("http") &&
                    !copy_url.scheme().eq_ignore_ascii_case("https")
                {
                    return Ok(None);
                }

                Ok(Some(copy_url))
            },
            can_gc,
        )
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-search
    fn GetSearch(&self) -> Fallible<USVString> {
        Ok(UrlHelper::Search(&self.get_url_if_same_origin()?))
    }

    // https://html.spec.whatwg.org/multipage/#dom-location-search
    fn SetSearch(&self, value: USVString, can_gc: CanGc) -> ErrorResult {
        self.setter_common(
            |mut copy_url| {
                // Step 4: If the given value is the empty string, set copyURL's query to null.
                // Step 5: Otherwise, run these substeps:
                //   1. Let input be the given value with a single leading "?" removed, if any.
                //   2. Set copyURL's query to the empty string.
                //   3. Basic URL parse input, with copyURL as url and query state as state
                //      override, and the relevant Document's document's character encoding as
                //      encoding override.
                copy_url.as_mut_url().set_query(match value.0.as_str() {
                    "" => None,
                    _ if value.0.starts_with('?') => Some(&value.0[1..]),
                    _ => Some(&value.0),
                });

                Ok(Some(copy_url))
            },
            can_gc,
        )
    }
}