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
|
/*
* Copyright (C) 2020-2021 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "IntlSegments.h"
#include "IntlObjectInlines.h"
#include "IntlSegmentIterator.h"
#include "IntlWorkaround.h"
#include "JSCInlines.h"
#include "ObjectConstructor.h"
#include <unicode/ucurr.h>
#include <unicode/uloc.h>
#include <wtf/unicode/icu/ICUHelpers.h>
namespace JSC {
const ClassInfo IntlSegments::s_info = { "Object"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(IntlSegments) };
IntlSegments* IntlSegments::create(VM& vm, Structure* structure, std::unique_ptr<UBreakIterator, UBreakIteratorDeleter>&& segmenter, Box<Vector<UChar>>&& buffer, JSString* string, IntlSegmenter::Granularity granularity)
{
auto* object = new (NotNull, allocateCell<IntlSegments>(vm)) IntlSegments(vm, structure, WTFMove(segmenter), WTFMove(buffer), granularity, string);
object->finishCreation(vm);
return object;
}
Structure* IntlSegments::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
IntlSegments::IntlSegments(VM& vm, Structure* structure, std::unique_ptr<UBreakIterator, UBreakIteratorDeleter>&& segmenter, Box<Vector<UChar>>&& buffer, IntlSegmenter::Granularity granularity, JSString* string)
: Base(vm, structure)
, m_segmenter(WTFMove(segmenter))
, m_buffer(WTFMove(buffer))
, m_string(string, WriteBarrierEarlyInit)
, m_granularity(granularity)
{
}
// https://tc39.es/proposal-intl-segmenter/#sec-intl.segmenter.prototype.containing
JSValue IntlSegments::containing(JSGlobalObject* globalObject, JSValue indexValue)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
double value = indexValue.toIntegerOrInfinity(globalObject);
RETURN_IF_EXCEPTION(scope, { });
if (value < 0 || value >= m_buffer->size())
return jsUndefined();
int32_t index = toInt32(value);
// The result of ubrk_preceding is always *smaller* than offset, or UBRK_DONE. In this case, we should set scan position with `index + 1`.
// Even if index + 1 exceeds length of string by 1, this is desirable if we want to scan the last segment.
int32_t startIndex = ubrk_preceding(m_segmenter.get(), index + 1);
if (startIndex == UBRK_DONE)
startIndex = 0;
// The result of ubrk_following is always greater than offset, or UBRK_DONE. Scan position should be `index`.
int32_t endIndex = ubrk_following(m_segmenter.get(), index);
if (endIndex == UBRK_DONE)
endIndex = m_buffer->size();
scope.release();
return IntlSegmenter::createSegmentDataObject(globalObject, m_string.get(), startIndex, endIndex, *m_segmenter, m_granularity);
}
// https://tc39.es/proposal-intl-segmenter/#sec-%segmentsprototype%-@@iterator
JSObject* IntlSegments::createSegmentIterator(JSGlobalObject* globalObject)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
UErrorCode status = U_ZERO_ERROR;
auto segmenter = std::unique_ptr<UBreakIterator, UBreakIteratorDeleter>(cloneUBreakIterator(m_segmenter.get(), &status));
if (U_FAILURE(status)) {
throwTypeError(globalObject, scope, "failed to initialize SegmentIterator"_s);
return nullptr;
}
ubrk_first(segmenter.get());
return IntlSegmentIterator::create(vm, globalObject->segmentIteratorStructure(), WTFMove(segmenter), m_buffer, m_string.get(), m_granularity);
}
template<typename Visitor>
void IntlSegments::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
auto* thisObject = jsCast<IntlSegments*>(cell);
Base::visitChildren(thisObject, visitor);
visitor.append(thisObject->m_string);
}
DEFINE_VISIT_CHILDREN(IntlSegments);
} // namespace JSC
|
