2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
4 * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
22 #ifndef CSSPrimitiveValue_h
23 #define CSSPrimitiveValue_h
25 #include "CSSPropertyNames.h"
26 #include "CSSValueKeywords.h"
27 #include "core/css/CSSValue.h"
28 #include "platform/graphics/Color.h"
29 #include "wtf/Forward.h"
30 #include "wtf/MathExtras.h"
31 #include "wtf/PassRefPtr.h"
37 class CSSToLengthConversionData;
48 // Dimension calculations are imprecise, often resulting in values of e.g.
49 // 44.99998. We need to go ahead and round if we're really close to the next
51 template<typename T> inline T roundForImpreciseConversion(double value)
53 value += (value < 0) ? -0.01 : +0.01;
54 return ((value > std::numeric_limits<T>::max()) || (value < std::numeric_limits<T>::min())) ? 0 : static_cast<T>(value);
57 template<> inline float roundForImpreciseConversion(double value)
59 double ceiledValue = ceil(value);
60 double proximityToNextInt = ceiledValue - value;
61 if (proximityToNextInt <= 0.01 && value > 0)
62 return static_cast<float>(ceiledValue);
63 if (proximityToNextInt >= 0.99 && value < 0)
64 return static_cast<float>(floor(value));
65 return static_cast<float>(value);
68 class CSSPrimitiveValue : public CSSValue {
97 // From CSS Values and Units. Viewport-percentage Lengths (vw/vh/vmin/vmax).
106 CSS_PAIR = 100, // We envision this being exposed as a means of getting computed style values for pairs (border-spacing/radius, background-position, etc.)
107 CSS_UNICODE_RANGE = 102,
109 // These next types are just used internally to allow us to translate back and forth from CSSPrimitiveValues to CSSParserValues.
110 CSS_PARSER_OPERATOR = 103,
111 CSS_PARSER_INTEGER = 104,
112 CSS_PARSER_HEXCOLOR = 105,
114 // This is used internally for unknown identifiers
115 CSS_PARSER_IDENTIFIER = 106,
117 // These are from CSS3 Values and Units, but that isn't a finished standard yet
122 // This is used internally for counter names (as opposed to counter values)
123 CSS_COUNTER_NAME = 110,
125 // This is used by the CSS Shapes draft
128 // Used by border images.
132 CSS_CALC_PERCENTAGE_WITH_NUMBER = 114,
133 CSS_CALC_PERCENTAGE_WITH_LENGTH = 115,
135 CSS_PROPERTY_ID = 117,
139 // This enum follows the BisonCSSParser::Units enum augmented with UNIT_FREQUENCY for frequencies.
150 static UnitCategory unitCategory(CSSPrimitiveValue::UnitTypes);
154 return m_primitiveUnitType == CSS_DEG
155 || m_primitiveUnitType == CSS_RAD
156 || m_primitiveUnitType == CSS_GRAD
157 || m_primitiveUnitType == CSS_TURN;
159 bool isAttr() const { return m_primitiveUnitType == CSS_ATTR; }
160 bool isCounter() const { return m_primitiveUnitType == CSS_COUNTER; }
161 bool isFontIndependentLength() const { return m_primitiveUnitType >= CSS_PX && m_primitiveUnitType <= CSS_PC; }
162 bool isFontRelativeLength() const
164 return m_primitiveUnitType == CSS_EMS
165 || m_primitiveUnitType == CSS_EXS
166 || m_primitiveUnitType == CSS_REMS
167 || m_primitiveUnitType == CSS_CHS;
169 bool isLength() const
171 unsigned short type = primitiveType();
172 return (type >= CSS_EMS && type <= CSS_PC) || type == CSS_REMS || type == CSS_CHS || isViewportPercentageLength();
174 bool isNumber() const { return primitiveType() == CSS_NUMBER; }
175 bool isPercentage() const { return primitiveType() == CSS_PERCENTAGE; }
176 bool isPx() const { return primitiveType() == CSS_PX; }
177 bool isRect() const { return m_primitiveUnitType == CSS_RECT; }
178 bool isRGBColor() const { return m_primitiveUnitType == CSS_RGBCOLOR; }
179 bool isShape() const { return m_primitiveUnitType == CSS_SHAPE; }
180 bool isString() const { return m_primitiveUnitType == CSS_STRING; }
181 bool isTime() const { return m_primitiveUnitType == CSS_S || m_primitiveUnitType == CSS_MS; }
182 bool isURI() const { return m_primitiveUnitType == CSS_URI; }
183 bool isCalculated() const { return m_primitiveUnitType == CSS_CALC; }
184 bool isCalculatedPercentageWithNumber() const { return primitiveType() == CSS_CALC_PERCENTAGE_WITH_NUMBER; }
185 bool isCalculatedPercentageWithLength() const { return primitiveType() == CSS_CALC_PERCENTAGE_WITH_LENGTH; }
186 bool isDotsPerInch() const { return primitiveType() == CSS_DPI; }
187 bool isDotsPerPixel() const { return primitiveType() == CSS_DPPX; }
188 bool isDotsPerCentimeter() const { return primitiveType() == CSS_DPCM; }
189 bool isResolution() const
191 unsigned short type = primitiveType();
192 return type >= CSS_DPPX && type <= CSS_DPCM;
194 bool isViewportPercentageLength() const { return m_primitiveUnitType >= CSS_VW && m_primitiveUnitType <= CSS_VMAX; }
195 bool isFlex() const { return primitiveType() == CSS_FR; }
196 bool isValueID() const { return m_primitiveUnitType == CSS_VALUE_ID; }
197 bool colorIsDerivedFromElement() const;
199 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createIdentifier(CSSValueID valueID)
201 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(valueID));
203 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createIdentifier(CSSPropertyID propertyID)
205 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(propertyID));
207 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createParserOperator(int parserOperator)
209 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(parserOperator));
211 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createColor(unsigned rgbValue)
213 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(rgbValue));
215 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> create(double value, UnitTypes type)
217 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(value, type));
219 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> create(const String& value, UnitTypes type)
221 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(value, type));
223 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> create(const Length& value, float zoom)
225 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(value, zoom));
227 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> create(const LengthSize& value)
229 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(value));
231 template<typename T> static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> create(T value)
233 return adoptRefCountedWillBeRefCountedGarbageCollected(new CSSPrimitiveValue(value));
236 // This value is used to handle quirky margins in reflow roots (body, td, and th) like WinIE.
237 // The basic idea is that a stylesheet can use the value __qem (for quirky em) instead of em.
238 // When the quirky value is used, if you're in quirks mode, the margin will collapse away
239 // inside a table cell.
240 static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> createAllowingMarginQuirk(double value, UnitTypes type)
242 CSSPrimitiveValue* quirkValue = new CSSPrimitiveValue(value, type);
243 quirkValue->m_isQuirkValue = true;
244 return adoptRefCountedWillBeRefCountedGarbageCollected(quirkValue);
247 ~CSSPrimitiveValue();
251 unsigned short primitiveType() const;
253 double computeDegrees();
255 enum TimeUnit { Seconds, Milliseconds };
256 template <typename T, TimeUnit timeUnit> T computeTime()
258 if (timeUnit == Seconds && m_primitiveUnitType == CSS_S)
259 return getValue<T>();
260 if (timeUnit == Seconds && m_primitiveUnitType == CSS_MS)
261 return getValue<T>() / 1000;
262 if (timeUnit == Milliseconds && m_primitiveUnitType == CSS_MS)
263 return getValue<T>();
264 if (timeUnit == Milliseconds && m_primitiveUnitType == CSS_S)
265 return getValue<T>() * 1000;
266 ASSERT_NOT_REACHED();
271 * Computes a length in pixels out of the given CSSValue
273 * The metrics have to be a bit different for screen and printer output.
274 * For screen output we assume 1 inch == 72 px, for printer we assume 300 dpi
276 * this is screen/printer dependent, so we probably need a config option for this,
277 * and some tool to calibrate.
279 template<typename T> T computeLength(const CSSToLengthConversionData&);
281 // Converts to a Length, mapping various unit types appropriately.
282 template<int> Length convertToLength(const CSSToLengthConversionData&);
285 void setPrimitiveType(unsigned short type) { m_primitiveUnitType = type; }
287 double getDoubleValue(unsigned short unitType, ExceptionState&) const;
288 double getDoubleValue(unsigned short unitType) const;
289 double getDoubleValue() const;
291 void setFloatValue(unsigned short unitType, double floatValue, ExceptionState&);
292 float getFloatValue(unsigned short unitType, ExceptionState& exceptionState) const { return getValue<float>(unitType, exceptionState); }
293 float getFloatValue(unsigned short unitType) const { return getValue<float>(unitType); }
294 float getFloatValue() const { return getValue<float>(); }
296 int getIntValue(unsigned short unitType, ExceptionState& exceptionState) const { return getValue<int>(unitType, exceptionState); }
297 int getIntValue(unsigned short unitType) const { return getValue<int>(unitType); }
298 int getIntValue() const { return getValue<int>(); }
300 template<typename T> inline T getValue(unsigned short unitType, ExceptionState& exceptionState) const { return clampTo<T>(getDoubleValue(unitType, exceptionState)); }
301 template<typename T> inline T getValue(unsigned short unitType) const { return clampTo<T>(getDoubleValue(unitType)); }
302 template<typename T> inline T getValue() const { return clampTo<T>(getDoubleValue()); }
304 void setStringValue(unsigned short stringType, const String& stringValue, ExceptionState&);
305 String getStringValue(ExceptionState&) const;
306 String getStringValue() const;
308 Counter* getCounterValue(ExceptionState&) const;
309 Counter* getCounterValue() const { return m_primitiveUnitType != CSS_COUNTER ? 0 : m_value.counter; }
311 Rect* getRectValue(ExceptionState&) const;
312 Rect* getRectValue() const { return m_primitiveUnitType != CSS_RECT ? 0 : m_value.rect; }
314 Quad* getQuadValue(ExceptionState&) const;
315 Quad* getQuadValue() const { return m_primitiveUnitType != CSS_QUAD ? 0 : m_value.quad; }
317 PassRefPtr<RGBColor> getRGBColorValue(ExceptionState&) const;
318 RGBA32 getRGBA32Value() const { return m_primitiveUnitType != CSS_RGBCOLOR ? 0 : m_value.rgbcolor; }
320 Pair* getPairValue(ExceptionState&) const;
321 Pair* getPairValue() const { return m_primitiveUnitType != CSS_PAIR ? 0 : m_value.pair; }
323 CSSBasicShape* getShapeValue() const { return m_primitiveUnitType != CSS_SHAPE ? 0 : m_value.shape; }
325 CSSCalcValue* cssCalcValue() const { return m_primitiveUnitType != CSS_CALC ? 0 : m_value.calc; }
327 CSSPropertyID getPropertyID() const { return m_primitiveUnitType == CSS_PROPERTY_ID ? m_value.propertyID : CSSPropertyInvalid; }
328 CSSValueID getValueID() const { return m_primitiveUnitType == CSS_VALUE_ID ? m_value.valueID : CSSValueInvalid; }
330 template<typename T> inline operator T() const; // Defined in CSSPrimitiveValueMappings.h
332 String customCSSText(CSSTextFormattingFlags = QuoteCSSStringIfNeeded) const;
334 bool isQuirkValue() { return m_isQuirkValue; }
336 PassRefPtrWillBeRawPtr<CSSPrimitiveValue> cloneForCSSOM() const;
337 void setCSSOMSafe() { m_isCSSOMSafe = true; }
339 bool equals(const CSSPrimitiveValue&) const;
341 void traceAfterDispatch(Visitor*);
343 static UnitTypes canonicalUnitTypeForCategory(UnitCategory);
344 static double conversionToCanonicalUnitsScaleFactor(unsigned short unitType);
347 CSSPrimitiveValue(CSSValueID);
348 CSSPrimitiveValue(CSSPropertyID);
349 // FIXME: int vs. unsigned overloading is too subtle to distinguish the color and operator cases.
350 CSSPrimitiveValue(int parserOperator);
351 CSSPrimitiveValue(unsigned color); // RGB value
352 CSSPrimitiveValue(const Length& length)
353 : CSSValue(PrimitiveClass)
357 CSSPrimitiveValue(const Length&, float zoom);
358 CSSPrimitiveValue(const LengthSize&);
359 CSSPrimitiveValue(const String&, UnitTypes);
360 CSSPrimitiveValue(double, UnitTypes);
362 template<typename T> CSSPrimitiveValue(T); // Defined in CSSPrimitiveValueMappings.h
363 template<typename T> CSSPrimitiveValue(T* val)
364 : CSSValue(PrimitiveClass)
366 init(PassRefPtr<T>(val));
369 template<typename T> CSSPrimitiveValue(PassRefPtr<T> val)
370 : CSSValue(PrimitiveClass)
375 // Remove below overloaded constructors once all callers of CSSPrimitiveValue(...)
376 // have been converted to PassRefPtrWillBeRawPtr.
377 explicit CSSPrimitiveValue(CSSCalcValue*);
378 explicit CSSPrimitiveValue(PassRefPtrWillBeRawPtr<CSSCalcValue>);
379 explicit CSSPrimitiveValue(Pair*);
380 explicit CSSPrimitiveValue(PassRefPtrWillBeRawPtr<Pair>);
381 explicit CSSPrimitiveValue(Counter*);
382 explicit CSSPrimitiveValue(PassRefPtrWillBeRawPtr<Counter>);
384 static void create(int); // compile-time guard
385 static void create(unsigned); // compile-time guard
386 template<typename T> operator T*(); // compile-time guard
388 void init(const Length&);
389 void init(const LengthSize&);
390 void init(PassRefPtrWillBeRawPtr<Counter>);
391 void init(PassRefPtr<Rect>);
392 void init(PassRefPtrWillBeRawPtr<Pair>);
393 void init(PassRefPtr<Quad>);
394 void init(PassRefPtr<CSSBasicShape>);
395 void init(PassRefPtrWillBeRawPtr<CSSCalcValue>);
396 bool getDoubleValueInternal(UnitTypes targetUnitType, double* result) const;
398 double computeLengthDouble(const CSSToLengthConversionData&);
401 CSSPropertyID propertyID;
409 CSSBasicShape* shape;
410 // FIXME: oilpan: Should be members, but no support for members in unions. Just trace the raw ptr for now.
417 DEFINE_CSS_VALUE_TYPE_CASTS(CSSPrimitiveValue, isPrimitiveValue());
419 } // namespace WebCore
421 #endif // CSSPrimitiveValue_h