1 | /* |
2 | Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
3 | Copyright (C) 2006, 2008, 2014 Apple Inc. All rights reserved. |
4 | Copyright (C) 2011 Rik Cabanier (cabanier@adobe.com) |
5 | Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved. |
6 | |
7 | This library is free software; you can redistribute it and/or |
8 | modify it under the terms of the GNU Library General Public |
9 | License as published by the Free Software Foundation; either |
10 | version 2 of the License, or (at your option) any later version. |
11 | |
12 | This library is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | Library General Public License for more details. |
16 | |
17 | You should have received a copy of the GNU Library General Public License |
18 | along with this library; see the file COPYING.LIB. If not, write to |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. |
21 | */ |
22 | |
23 | #ifndef Length_h |
24 | #define Length_h |
25 | |
26 | #include "AnimationUtilities.h" |
27 | #include <memory> |
28 | #include <string.h> |
29 | #include <wtf/Assertions.h> |
30 | #include <wtf/FastMalloc.h> |
31 | #include <wtf/Forward.h> |
32 | #include <wtf/UniqueArray.h> |
33 | |
34 | namespace WTF { |
35 | class TextStream; |
36 | } |
37 | |
38 | namespace WebCore { |
39 | |
40 | enum LengthType { |
41 | Auto, Relative, Percent, Fixed, |
42 | Intrinsic, MinIntrinsic, |
43 | MinContent, MaxContent, FillAvailable, FitContent, |
44 | Calculated, |
45 | Undefined |
46 | }; |
47 | |
48 | enum ValueRange { |
49 | ValueRangeAll, |
50 | ValueRangeNonNegative |
51 | }; |
52 | |
53 | class CalculationValue; |
54 | |
55 | struct Length { |
56 | WTF_MAKE_FAST_ALLOCATED; |
57 | public: |
58 | Length(LengthType = Auto); |
59 | |
60 | Length(int value, LengthType, bool hasQuirk = false); |
61 | Length(LayoutUnit value, LengthType, bool hasQuirk = false); |
62 | Length(float value, LengthType, bool hasQuirk = false); |
63 | Length(double value, LengthType, bool hasQuirk = false); |
64 | |
65 | WEBCORE_EXPORT explicit Length(Ref<CalculationValue>&&); |
66 | |
67 | Length(const Length&); |
68 | Length(Length&&); |
69 | Length& operator=(const Length&); |
70 | Length& operator=(Length&&); |
71 | |
72 | ~Length(); |
73 | |
74 | void setValue(LengthType, int value); |
75 | void setValue(LengthType, float value); |
76 | void setValue(LengthType, LayoutUnit value); |
77 | Length& operator*=(float); |
78 | |
79 | void setHasQuirk(bool); |
80 | |
81 | bool operator==(const Length&) const; |
82 | bool operator!=(const Length&) const; |
83 | |
84 | float value() const; |
85 | int intValue() const; |
86 | float percent() const; |
87 | CalculationValue& calculationValue() const; |
88 | |
89 | LengthType type() const; |
90 | |
91 | bool isAuto() const; |
92 | bool isCalculated() const; |
93 | bool isFixed() const; |
94 | bool isMaxContent() const; |
95 | bool isMinContent() const; |
96 | bool isPercent() const; |
97 | bool isRelative() const; |
98 | bool isUndefined() const; |
99 | bool isFillAvailable() const; |
100 | bool isFitContent() const; |
101 | |
102 | bool hasQuirk() const; |
103 | |
104 | // FIXME calc: https://bugs.webkit.org/show_bug.cgi?id=80357. A calculated Length |
105 | // always contains a percentage, and without a maxValue passed to these functions |
106 | // it's impossible to determine the sign or zero-ness. The following three functions |
107 | // act as if all calculated values are positive. |
108 | bool isZero() const; |
109 | bool isPositive() const; |
110 | bool isNegative() const; |
111 | |
112 | bool isPercentOrCalculated() const; // Returns true for both Percent and Calculated. |
113 | |
114 | bool isIntrinsic() const; |
115 | bool isIntrinsicOrAuto() const; |
116 | bool isSpecified() const; |
117 | bool isSpecifiedOrIntrinsic() const; |
118 | |
119 | float nonNanCalculatedValue(int maxValue) const; |
120 | |
121 | private: |
122 | bool isLegacyIntrinsic() const; |
123 | |
124 | bool isCalculatedEqual(const Length&) const; |
125 | |
126 | WEBCORE_EXPORT void ref() const; |
127 | WEBCORE_EXPORT void deref() const; |
128 | |
129 | union { |
130 | int m_intValue; |
131 | float m_floatValue; |
132 | unsigned m_calculationValueHandle; |
133 | }; |
134 | bool m_hasQuirk; |
135 | unsigned char m_type; |
136 | bool m_isFloat; |
137 | }; |
138 | |
139 | // Blend two lengths to produce a new length that is in between them. Used for animation. |
140 | Length blend(const Length& from, const Length& to, double progress); |
141 | |
142 | UniqueArray<Length> newCoordsArray(const String&, int& length); |
143 | UniqueArray<Length> newLengthArray(const String&, int& length); |
144 | |
145 | inline Length::Length(LengthType type) |
146 | : m_intValue(0), m_hasQuirk(false), m_type(type), m_isFloat(false) |
147 | { |
148 | ASSERT(type != Calculated); |
149 | } |
150 | |
151 | inline Length::Length(int value, LengthType type, bool hasQuirk) |
152 | : m_intValue(value), m_hasQuirk(hasQuirk), m_type(type), m_isFloat(false) |
153 | { |
154 | ASSERT(type != Calculated); |
155 | } |
156 | |
157 | inline Length::Length(LayoutUnit value, LengthType type, bool hasQuirk) |
158 | : m_floatValue(value.toFloat()), m_hasQuirk(hasQuirk), m_type(type), m_isFloat(true) |
159 | { |
160 | ASSERT(type != Calculated); |
161 | } |
162 | |
163 | inline Length::Length(float value, LengthType type, bool hasQuirk) |
164 | : m_floatValue(value), m_hasQuirk(hasQuirk), m_type(type), m_isFloat(true) |
165 | { |
166 | ASSERT(type != Calculated); |
167 | } |
168 | |
169 | inline Length::Length(double value, LengthType type, bool hasQuirk) |
170 | : m_floatValue(static_cast<float>(value)), m_hasQuirk(hasQuirk), m_type(type), m_isFloat(true) |
171 | { |
172 | ASSERT(type != Calculated); |
173 | } |
174 | |
175 | inline Length::Length(const Length& other) |
176 | { |
177 | if (other.isCalculated()) |
178 | other.ref(); |
179 | |
180 | memcpy(static_cast<void*>(this), static_cast<void*>(const_cast<Length*>(&other)), sizeof(Length)); |
181 | } |
182 | |
183 | inline Length::Length(Length&& other) |
184 | { |
185 | memcpy(static_cast<void*>(this), static_cast<void*>(&other), sizeof(Length)); |
186 | other.m_type = Auto; |
187 | } |
188 | |
189 | inline Length& Length::operator=(const Length& other) |
190 | { |
191 | if (this == &other) |
192 | return *this; |
193 | |
194 | if (other.isCalculated()) |
195 | other.ref(); |
196 | if (isCalculated()) |
197 | deref(); |
198 | |
199 | memcpy(static_cast<void*>(this), static_cast<void*>(const_cast<Length*>(&other)), sizeof(Length)); |
200 | return *this; |
201 | } |
202 | |
203 | inline Length& Length::operator=(Length&& other) |
204 | { |
205 | if (this == &other) |
206 | return *this; |
207 | |
208 | if (isCalculated()) |
209 | deref(); |
210 | |
211 | memcpy(static_cast<void*>(this), static_cast<void*>(&other), sizeof(Length)); |
212 | other.m_type = Auto; |
213 | return *this; |
214 | } |
215 | |
216 | inline Length::~Length() |
217 | { |
218 | if (isCalculated()) |
219 | deref(); |
220 | } |
221 | |
222 | inline bool Length::operator==(const Length& other) const |
223 | { |
224 | // FIXME: This might be too long to be inline. |
225 | if (type() != other.type() || hasQuirk() != other.hasQuirk()) |
226 | return false; |
227 | if (isUndefined()) |
228 | return true; |
229 | if (isCalculated()) |
230 | return isCalculatedEqual(other); |
231 | return value() == other.value(); |
232 | } |
233 | |
234 | inline bool Length::operator!=(const Length& other) const |
235 | { |
236 | return !(*this == other); |
237 | } |
238 | |
239 | inline Length& Length::operator*=(float value) |
240 | { |
241 | ASSERT(!isCalculated()); |
242 | if (isCalculated()) |
243 | return *this; |
244 | |
245 | if (m_isFloat) |
246 | m_floatValue *= value; |
247 | else |
248 | m_intValue *= value; |
249 | |
250 | return *this; |
251 | } |
252 | |
253 | inline float Length::value() const |
254 | { |
255 | ASSERT(!isUndefined()); |
256 | ASSERT(!isCalculated()); |
257 | return m_isFloat ? m_floatValue : m_intValue; |
258 | } |
259 | |
260 | inline int Length::intValue() const |
261 | { |
262 | ASSERT(!isUndefined()); |
263 | ASSERT(!isCalculated()); |
264 | // FIXME: Makes no sense to return 0 here but not in the value() function above. |
265 | if (isCalculated()) |
266 | return 0; |
267 | return m_isFloat ? static_cast<int>(m_floatValue) : m_intValue; |
268 | } |
269 | |
270 | inline float Length::percent() const |
271 | { |
272 | ASSERT(isPercent()); |
273 | return value(); |
274 | } |
275 | |
276 | inline LengthType Length::type() const |
277 | { |
278 | return static_cast<LengthType>(m_type); |
279 | } |
280 | |
281 | inline bool Length::hasQuirk() const |
282 | { |
283 | return m_hasQuirk; |
284 | } |
285 | |
286 | inline void Length::setHasQuirk(bool hasQuirk) |
287 | { |
288 | m_hasQuirk = hasQuirk; |
289 | } |
290 | |
291 | inline void Length::setValue(LengthType type, int value) |
292 | { |
293 | ASSERT(m_type != Calculated); |
294 | ASSERT(type != Calculated); |
295 | m_type = type; |
296 | m_intValue = value; |
297 | m_isFloat = false; |
298 | } |
299 | |
300 | inline void Length::setValue(LengthType type, float value) |
301 | { |
302 | ASSERT(m_type != Calculated); |
303 | ASSERT(type != Calculated); |
304 | m_type = type; |
305 | m_floatValue = value; |
306 | m_isFloat = true; |
307 | } |
308 | |
309 | inline void Length::setValue(LengthType type, LayoutUnit value) |
310 | { |
311 | ASSERT(m_type != Calculated); |
312 | ASSERT(type != Calculated); |
313 | m_type = type; |
314 | m_floatValue = value; |
315 | m_isFloat = true; |
316 | } |
317 | |
318 | inline bool Length::isAuto() const |
319 | { |
320 | return type() == Auto; |
321 | } |
322 | |
323 | inline bool Length::isFixed() const |
324 | { |
325 | return type() == Fixed; |
326 | } |
327 | |
328 | inline bool Length::isMaxContent() const |
329 | { |
330 | return type() == MaxContent; |
331 | } |
332 | |
333 | inline bool Length::isMinContent() const |
334 | { |
335 | return type() == MinContent; |
336 | } |
337 | |
338 | inline bool Length::isNegative() const |
339 | { |
340 | if (isUndefined() || isCalculated()) |
341 | return false; |
342 | return m_isFloat ? (m_floatValue < 0) : (m_intValue < 0); |
343 | } |
344 | |
345 | inline bool Length::isPercent() const |
346 | { |
347 | return type() == Percent; |
348 | } |
349 | |
350 | inline bool Length::isRelative() const |
351 | { |
352 | return type() == Relative; |
353 | } |
354 | |
355 | inline bool Length::isUndefined() const |
356 | { |
357 | return type() == Undefined; |
358 | } |
359 | |
360 | inline bool Length::isPercentOrCalculated() const |
361 | { |
362 | return isPercent() || isCalculated(); |
363 | } |
364 | |
365 | inline bool Length::isPositive() const |
366 | { |
367 | if (isUndefined()) |
368 | return false; |
369 | if (isCalculated()) |
370 | return true; |
371 | return m_isFloat ? (m_floatValue > 0) : (m_intValue > 0); |
372 | } |
373 | |
374 | inline bool Length::isZero() const |
375 | { |
376 | ASSERT(!isUndefined()); |
377 | if (isCalculated()) |
378 | return false; |
379 | return m_isFloat ? !m_floatValue : !m_intValue; |
380 | } |
381 | |
382 | inline bool Length::isCalculated() const |
383 | { |
384 | return type() == Calculated; |
385 | } |
386 | |
387 | inline bool Length::isLegacyIntrinsic() const |
388 | { |
389 | return type() == Intrinsic || type() == MinIntrinsic; |
390 | } |
391 | |
392 | inline bool Length::isIntrinsic() const |
393 | { |
394 | return type() == MinContent || type() == MaxContent || type() == FillAvailable || type() == FitContent; |
395 | } |
396 | |
397 | inline bool Length::isIntrinsicOrAuto() const |
398 | { |
399 | return isAuto() || isIntrinsic() || isLegacyIntrinsic(); |
400 | } |
401 | |
402 | inline bool Length::isSpecified() const |
403 | { |
404 | return isFixed() || isPercentOrCalculated(); |
405 | } |
406 | |
407 | inline bool Length::isSpecifiedOrIntrinsic() const |
408 | { |
409 | return isSpecified() || isIntrinsic(); |
410 | } |
411 | |
412 | inline bool Length::isFillAvailable() const |
413 | { |
414 | return type() == FillAvailable; |
415 | } |
416 | |
417 | inline bool Length::isFitContent() const |
418 | { |
419 | return type() == FitContent; |
420 | } |
421 | |
422 | Length convertTo100PercentMinusLength(const Length&); |
423 | |
424 | WTF::TextStream& operator<<(WTF::TextStream&, Length); |
425 | |
426 | } // namespace WebCore |
427 | |
428 | #endif // Length_h |
429 | |