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juce_Range.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2022 - Raw Material Software Limited
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23 namespace juce
24{
25
26//==============================================================================
38 template <typename ValueType>
39 class Range
40{
41 public:
42 //==============================================================================
44 constexpr Range() = default;
45
47 constexpr Range (const ValueType startValue, const ValueType endValue) noexcept
48 : start (startValue), end (jmax (startValue, endValue))
49 {
50 }
51
53 constexpr Range (const Range&) = default;
54
56 Range& operator= (const Range&) = default;
57
59 constexpr static Range between (const ValueType position1, const ValueType position2) noexcept
60 {
61 return position1 < position2 ? Range (position1, position2)
62 : Range (position2, position1);
63 }
64
66 [[nodiscard]] static Range withStartAndLength (const ValueType startValue, const ValueType length) noexcept
67 {
68 jassert (length >= ValueType());
69 return Range (startValue, startValue + length);
70 }
71
73 [[nodiscard]] constexpr static Range emptyRange (const ValueType start) noexcept
74 {
75 return Range (start, start);
76 }
77
78 //==============================================================================
80 constexpr inline ValueType getStart() const noexcept { return start; }
81
83 constexpr inline ValueType getLength() const noexcept { return end - start; }
84
86 constexpr inline ValueType getEnd() const noexcept { return end; }
87
89 constexpr inline bool isEmpty() const noexcept { return exactlyEqual (start, end); }
90
91 //==============================================================================
96 void setStart (const ValueType newStart) noexcept
97 {
98 start = newStart;
99 if (end < newStart)
100 end = newStart;
101 }
102
107 [[nodiscard]] constexpr Range withStart (const ValueType newStart) const noexcept
108 {
109 return Range (newStart, jmax (newStart, end));
110 }
111
113 [[nodiscard]] constexpr Range movedToStartAt (const ValueType newStart) const noexcept
114 {
115 return Range (newStart, end + (newStart - start));
116 }
117
122 void setEnd (const ValueType newEnd) noexcept
123 {
124 end = newEnd;
125 if (newEnd < start)
126 start = newEnd;
127 }
128
133 [[nodiscard]] constexpr Range withEnd (const ValueType newEnd) const noexcept
134 {
135 return Range (jmin (start, newEnd), newEnd);
136 }
137
139 [[nodiscard]] constexpr Range movedToEndAt (const ValueType newEnd) const noexcept
140 {
141 return Range (start + (newEnd - end), newEnd);
142 }
143
147 void setLength (const ValueType newLength) noexcept
148 {
149 end = start + jmax (ValueType(), newLength);
150 }
151
155 [[nodiscard]] constexpr Range withLength (const ValueType newLength) const noexcept
156 {
157 return Range (start, start + newLength);
158 }
159
164 [[nodiscard]] constexpr Range expanded (ValueType amount) const noexcept
165 {
166 return Range (start - amount, end + amount);
167 }
168
169 //==============================================================================
171 inline Range operator+= (const ValueType amountToAdd) noexcept
172 {
173 start += amountToAdd;
174 end += amountToAdd;
175 return *this;
176 }
177
179 inline Range operator-= (const ValueType amountToSubtract) noexcept
180 {
181 start -= amountToSubtract;
182 end -= amountToSubtract;
183 return *this;
184 }
185
189 constexpr Range operator+ (const ValueType amountToAdd) const noexcept
190 {
191 return Range (start + amountToAdd, end + amountToAdd);
192 }
193
196 constexpr Range operator- (const ValueType amountToSubtract) const noexcept
197 {
198 return Range (start - amountToSubtract, end - amountToSubtract);
199 }
200
201 constexpr bool operator== (Range other) const noexcept
202 {
203 const auto tie = [] (const Range& r) { return std::tie (r.start, r.end); };
204 return tie (*this) == tie (other);
205 }
206
207 constexpr bool operator!= (Range other) const noexcept { return ! operator== (other); }
208
209 //==============================================================================
214 constexpr bool contains (const ValueType position) const noexcept
215 {
216 return start <= position && position < end;
217 }
218
220 ValueType clipValue (const ValueType value) const noexcept
221 {
222 return jlimit (start, end, value);
223 }
224
226 constexpr bool contains (Range other) const noexcept
227 {
228 return start <= other.start && end >= other.end;
229 }
230
232 constexpr bool intersects (Range other) const noexcept
233 {
234 return other.start < end && start < other.end;
235 }
236
239 [[nodiscard]] constexpr Range getIntersectionWith (Range other) const noexcept
240 {
241 return Range (jmax (start, other.start),
242 jmin (end, other.end));
243 }
244
246 [[nodiscard]] constexpr Range getUnionWith (Range other) const noexcept
247 {
248 return Range (jmin (start, other.start),
249 jmax (end, other.end));
250 }
251
253 [[nodiscard]] constexpr Range getUnionWith (const ValueType valueToInclude) const noexcept
254 {
255 return Range (jmin (valueToInclude, start),
256 jmax (valueToInclude, end));
257 }
258
269 Range constrainRange (Range rangeToConstrain) const noexcept
270 {
271 const ValueType otherLen = rangeToConstrain.getLength();
272 return getLength() <= otherLen
273 ? *this
274 : rangeToConstrain.movedToStartAt (jlimit (start, end - otherLen, rangeToConstrain.getStart()));
275 }
276
278 template <typename Integral, std::enable_if_t<std::is_integral_v<Integral>, int> = 0>
279 static Range findMinAndMax (const ValueType* values, Integral numValues) noexcept
280 {
281 if (numValues <= 0)
282 return Range();
283
284 const ValueType first (*values++);
285 Range r (first, first);
286
287 while (--numValues > 0) // (> 0 rather than >= 0 because we've already taken the first sample)
288 {
289 const ValueType v (*values++);
290
291 if (r.end < v) r.end = v;
292 if (v < r.start) r.start = v;
293 }
294
295 return r;
296 }
297
298 private:
299 //==============================================================================
300 ValueType start{}, end{};
301};
302
303} // namespace juce
juce::Range
Definition juce_Range.h:40
juce::Range::withStartAndLength
static Range withStartAndLength(const ValueType startValue, const ValueType length) noexcept
Definition juce_Range.h:66
juce::Range::setEnd
void setEnd(const ValueType newEnd) noexcept
Definition juce_Range.h:122
juce::Range::expanded
constexpr Range expanded(ValueType amount) const noexcept
Definition juce_Range.h:164
juce::Range::constrainRange
Range constrainRange(Range rangeToConstrain) const noexcept
Definition juce_Range.h:269
juce::Range::getStart
constexpr ValueType getStart() const noexcept
Definition juce_Range.h:80
juce::Range::operator-
constexpr Range operator-(const ValueType amountToSubtract) const noexcept
Definition juce_Range.h:196
juce::Range::contains
constexpr bool contains(Range other) const noexcept
Definition juce_Range.h:226
juce::Range::isEmpty
constexpr bool isEmpty() const noexcept
Definition juce_Range.h:89
juce::Range::getIntersectionWith
constexpr Range getIntersectionWith(Range other) const noexcept
Definition juce_Range.h:239
juce::Range::emptyRange
static constexpr Range emptyRange(const ValueType start) noexcept
Definition juce_Range.h:73
juce::Range::intersects
constexpr bool intersects(Range other) const noexcept
Definition juce_Range.h:232
juce::Range::getEnd
constexpr ValueType getEnd() const noexcept
Definition juce_Range.h:86
juce::Range::operator+
constexpr Range operator+(const ValueType amountToAdd) const noexcept
Definition juce_Range.h:189
juce::Range::withEnd
constexpr Range withEnd(const ValueType newEnd) const noexcept
Definition juce_Range.h:133
juce::Range::Range
constexpr Range(const ValueType startValue, const ValueType endValue) noexcept
Definition juce_Range.h:47
juce::Range::Range
constexpr Range(const Range &)=default
juce::Range::getUnionWith
constexpr Range getUnionWith(Range other) const noexcept
Definition juce_Range.h:246
juce::Range::findMinAndMax
static Range findMinAndMax(const ValueType *values, Integral numValues) noexcept
Definition juce_Range.h:279
juce::Range::clipValue
ValueType clipValue(const ValueType value) const noexcept
Definition juce_Range.h:220
juce::Range::between
static constexpr Range between(const ValueType position1, const ValueType position2) noexcept
Definition juce_Range.h:59
juce::Range::movedToStartAt
constexpr Range movedToStartAt(const ValueType newStart) const noexcept
Definition juce_Range.h:113
juce::Range::withLength
constexpr Range withLength(const ValueType newLength) const noexcept
Definition juce_Range.h:155
juce::Range::getUnionWith
constexpr Range getUnionWith(const ValueType valueToInclude) const noexcept
Definition juce_Range.h:253
juce::Range::operator+=
Range operator+=(const ValueType amountToAdd) noexcept
Definition juce_Range.h:171
juce::Range::setLength
void setLength(const ValueType newLength) noexcept
Definition juce_Range.h:147
juce::Range::setStart
void setStart(const ValueType newStart) noexcept
Definition juce_Range.h:96
juce::Range::getLength
constexpr ValueType getLength() const noexcept
Definition juce_Range.h:83
juce::Range::operator=
Range & operator=(const Range &)=default
juce::Range::contains
constexpr bool contains(const ValueType position) const noexcept
Definition juce_Range.h:214
juce::Range::operator-=
Range operator-=(const ValueType amountToSubtract) noexcept
Definition juce_Range.h:179
juce::Range::Range
constexpr Range()=default
juce::Range::withStart
constexpr Range withStart(const ValueType newStart) const noexcept
Definition juce_Range.h:107
juce::Range::movedToEndAt
constexpr Range movedToEndAt(const ValueType newEnd) const noexcept
Definition juce_Range.h:139