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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "core/css/cssom/CSSCalcLength.h" | |
| 6 | |
| 7 #include "bindings/core/v8/ExceptionState.h" | |
| 8 #include "core/css/CSSCalculationValue.h" | |
| 9 #include "core/css/CSSPrimitiveValue.h" | |
| 10 #include "core/css/cssom/CSSCalcDictionary.h" | |
| 11 #include "core/css/cssom/CSSSimpleLength.h" | |
| 12 #include "platform/wtf/Vector.h" | |
| 13 | |
| 14 namespace blink { | |
| 15 | |
| 16 namespace { | |
| 17 | |
| 18 static CSSPrimitiveValue::UnitType UnitFromIndex(int index) { | |
| 19 DCHECK(index < CSSLengthValue::kNumSupportedUnits); | |
| 20 int lowest_value = static_cast<int>(CSSPrimitiveValue::UnitType::kPercentage); | |
| 21 return static_cast<CSSPrimitiveValue::UnitType>(index + lowest_value); | |
| 22 } | |
| 23 | |
| 24 int IndexForUnit(CSSPrimitiveValue::UnitType unit) { | |
| 25 return (static_cast<int>(unit) - | |
| 26 static_cast<int>(CSSPrimitiveValue::UnitType::kPercentage)); | |
| 27 } | |
| 28 | |
| 29 } // namespace | |
| 30 | |
| 31 CSSCalcLength::CSSCalcLength(const CSSCalcLength& other) | |
| 32 : unit_data_(other.unit_data_) {} | |
| 33 | |
| 34 CSSCalcLength::CSSCalcLength(const CSSSimpleLength& other) { | |
| 35 unit_data_.Set(other.LengthUnit(), other.value()); | |
| 36 } | |
| 37 | |
| 38 CSSCalcLength* CSSCalcLength::Create(const CSSLengthValue* length) { | |
| 39 if (length->GetType() == kSimpleLengthType) { | |
| 40 const CSSSimpleLength* simple_length = ToCSSSimpleLength(length); | |
| 41 return new CSSCalcLength(*simple_length); | |
| 42 } | |
| 43 | |
| 44 return new CSSCalcLength(*ToCSSCalcLength(length)); | |
| 45 } | |
| 46 | |
| 47 CSSCalcLength* CSSCalcLength::Create(const CSSCalcDictionary& dictionary, | |
| 48 ExceptionState& exception_state) { | |
| 49 int num_set = 0; | |
| 50 UnitData result; | |
| 51 | |
| 52 #define SET_FROM_DICT_VALUE(name, camelName, primitiveName) \ | |
| 53 if (dictionary.has##camelName()) { \ | |
| 54 result.Set(CSSPrimitiveValue::UnitType::primitiveName, dictionary.name()); \ | |
| 55 num_set++; \ | |
| 56 } | |
| 57 | |
| 58 SET_FROM_DICT_VALUE(px, Px, kPixels) | |
| 59 SET_FROM_DICT_VALUE(percent, Percent, kPercentage) | |
| 60 SET_FROM_DICT_VALUE(em, Em, kEms) | |
| 61 SET_FROM_DICT_VALUE(ex, Ex, kExs) | |
| 62 SET_FROM_DICT_VALUE(ch, Ch, kChs) | |
| 63 SET_FROM_DICT_VALUE(rem, Rem, kRems) | |
| 64 SET_FROM_DICT_VALUE(vw, Vw, kViewportWidth) | |
| 65 SET_FROM_DICT_VALUE(vh, Vh, kViewportHeight) | |
| 66 SET_FROM_DICT_VALUE(vmin, Vmin, kViewportMin) | |
| 67 SET_FROM_DICT_VALUE(vmax, Vmax, kViewportMax) | |
| 68 SET_FROM_DICT_VALUE(cm, Cm, kCentimeters) | |
| 69 SET_FROM_DICT_VALUE(mm, Mm, kMillimeters) | |
| 70 SET_FROM_DICT_VALUE(in, In, kInches) | |
| 71 SET_FROM_DICT_VALUE(pc, Pc, kPicas) | |
| 72 SET_FROM_DICT_VALUE(pt, Pt, kPoints) | |
| 73 | |
| 74 #undef SET_FROM_DICT_VALUE | |
| 75 | |
| 76 if (num_set == 0) { | |
| 77 exception_state.ThrowTypeError( | |
| 78 "Must specify at least one value in CSSCalcDictionary for creating a " | |
| 79 "CSSCalcLength."); | |
| 80 return nullptr; | |
| 81 } | |
| 82 return new CSSCalcLength(result); | |
| 83 } | |
| 84 | |
| 85 CSSCalcLength* CSSCalcLength::FromCSSValue(const CSSPrimitiveValue& value) { | |
| 86 std::unique_ptr<UnitData> unit_data = | |
| 87 UnitData::FromExpressionNode(value.CssCalcValue()->ExpressionNode()); | |
| 88 if (unit_data) | |
| 89 return new CSSCalcLength(*unit_data); | |
| 90 return nullptr; | |
| 91 } | |
| 92 | |
| 93 CSSCalcLength* CSSCalcLength::FromLength(const Length& length) { | |
| 94 DCHECK(length.IsCalculated()); | |
| 95 PixelsAndPercent values = length.GetPixelsAndPercent(); | |
| 96 UnitData unit_data; | |
| 97 unit_data.Set(CSSPrimitiveValue::UnitType::kPixels, values.pixels); | |
| 98 unit_data.Set(CSSPrimitiveValue::UnitType::kPercentage, values.percent); | |
| 99 CSSCalcLength* result = new CSSCalcLength(unit_data); | |
| 100 return result; | |
| 101 } | |
| 102 | |
| 103 bool CSSCalcLength::ContainsPercent() const { | |
| 104 return unit_data_.Has(CSSPrimitiveValue::UnitType::kPercentage); | |
| 105 } | |
| 106 | |
| 107 CSSLengthValue* CSSCalcLength::AddInternal(const CSSLengthValue* other) { | |
| 108 UnitData result = unit_data_; | |
| 109 if (other->GetType() == kSimpleLengthType) { | |
| 110 const CSSSimpleLength* simple_length = ToCSSSimpleLength(other); | |
| 111 result.Set( | |
| 112 simple_length->LengthUnit(), | |
| 113 unit_data_.Get(simple_length->LengthUnit()) + simple_length->value()); | |
| 114 } else { | |
| 115 result.Add(ToCSSCalcLength(other)->unit_data_); | |
| 116 } | |
| 117 return new CSSCalcLength(result); | |
| 118 } | |
| 119 | |
| 120 CSSLengthValue* CSSCalcLength::SubtractInternal(const CSSLengthValue* other) { | |
| 121 UnitData result = unit_data_; | |
| 122 if (other->GetType() == kSimpleLengthType) { | |
| 123 const CSSSimpleLength* simple_length = ToCSSSimpleLength(other); | |
| 124 result.Set( | |
| 125 simple_length->LengthUnit(), | |
| 126 unit_data_.Get(simple_length->LengthUnit()) - simple_length->value()); | |
| 127 } else { | |
| 128 result.Subtract(ToCSSCalcLength(other)->unit_data_); | |
| 129 } | |
| 130 return new CSSCalcLength(result); | |
| 131 } | |
| 132 | |
| 133 CSSLengthValue* CSSCalcLength::MultiplyInternal(double x) { | |
| 134 UnitData result = unit_data_; | |
| 135 result.Multiply(x); | |
| 136 return new CSSCalcLength(result); | |
| 137 } | |
| 138 | |
| 139 CSSLengthValue* CSSCalcLength::DivideInternal(double x) { | |
| 140 UnitData result = unit_data_; | |
| 141 result.Divide(x); | |
| 142 return new CSSCalcLength(result); | |
| 143 } | |
| 144 | |
| 145 CSSValue* CSSCalcLength::ToCSSValue() const { | |
| 146 CSSCalcExpressionNode* node = unit_data_.ToCSSCalcExpressionNode(); | |
| 147 if (node) | |
| 148 return CSSPrimitiveValue::Create(CSSCalcValue::Create(node)); | |
| 149 return nullptr; | |
| 150 } | |
| 151 | |
| 152 std::unique_ptr<CSSCalcLength::UnitData> | |
| 153 CSSCalcLength::UnitData::FromExpressionNode( | |
| 154 const CSSCalcExpressionNode* expression_node) { | |
| 155 CalculationCategory category = expression_node->Category(); | |
| 156 DCHECK(category == CalculationCategory::kCalcLength || | |
| 157 category == CalculationCategory::kCalcPercentLength || | |
| 158 category == CalculationCategory::kCalcPercent); | |
| 159 | |
| 160 if (expression_node->GetType() == | |
| 161 CSSCalcExpressionNode::Type::kCssCalcPrimitiveValue) { | |
| 162 CSSPrimitiveValue::UnitType unit = expression_node->TypeWithCalcResolved(); | |
| 163 DCHECK(CSSLengthValue::IsSupportedLengthUnit(unit)); | |
| 164 std::unique_ptr<UnitData> result(new UnitData()); | |
| 165 result->Set(unit, expression_node->DoubleValue()); | |
| 166 return result; | |
| 167 } | |
| 168 | |
| 169 const CSSCalcExpressionNode* left = expression_node->LeftExpressionNode(); | |
| 170 const CSSCalcExpressionNode* right = expression_node->RightExpressionNode(); | |
| 171 CalcOperator op = expression_node->OperatorType(); | |
| 172 | |
| 173 if (op == kCalcMultiply) { | |
| 174 std::unique_ptr<UnitData> unit_data = nullptr; | |
| 175 double argument = 0; | |
| 176 // One side should be a number. | |
| 177 if (left->Category() == CalculationCategory::kCalcNumber) { | |
| 178 unit_data = UnitData::FromExpressionNode(right); | |
| 179 argument = left->DoubleValue(); | |
| 180 } else if (right->Category() == CalculationCategory::kCalcNumber) { | |
| 181 unit_data = UnitData::FromExpressionNode(left); | |
| 182 argument = right->DoubleValue(); | |
| 183 } else { | |
| 184 NOTREACHED(); | |
| 185 return nullptr; | |
| 186 } | |
| 187 DCHECK(unit_data); | |
| 188 unit_data->Multiply(argument); | |
| 189 return unit_data; | |
| 190 } | |
| 191 | |
| 192 if (op == kCalcDivide) { | |
| 193 // Divisor must always be on the RHS. | |
| 194 DCHECK_EQ(right->Category(), CalculationCategory::kCalcNumber); | |
| 195 std::unique_ptr<UnitData> unit_data = UnitData::FromExpressionNode(left); | |
| 196 DCHECK(unit_data); | |
| 197 unit_data->Divide(right->DoubleValue()); | |
| 198 return unit_data; | |
| 199 } | |
| 200 | |
| 201 // Add and subtract. | |
| 202 std::unique_ptr<UnitData> left_unit_data = UnitData::FromExpressionNode(left); | |
| 203 std::unique_ptr<UnitData> right_unit_data = | |
| 204 UnitData::FromExpressionNode(right); | |
| 205 DCHECK(left_unit_data); | |
| 206 DCHECK(right_unit_data); | |
| 207 | |
| 208 if (op == kCalcAdd) | |
| 209 left_unit_data->Add(*right_unit_data); | |
| 210 else if (op == kCalcSubtract) | |
| 211 left_unit_data->Subtract(*right_unit_data); | |
| 212 else | |
| 213 NOTREACHED(); | |
| 214 | |
| 215 return left_unit_data; | |
| 216 } | |
| 217 | |
| 218 CSSCalcExpressionNode* CSSCalcLength::UnitData::ToCSSCalcExpressionNode() | |
| 219 const { | |
| 220 CSSCalcExpressionNode* node = nullptr; | |
| 221 for (unsigned i = 0; i < CSSLengthValue::kNumSupportedUnits; ++i) { | |
| 222 if (!HasAtIndex(i)) | |
| 223 continue; | |
| 224 double value = GetAtIndex(i); | |
| 225 if (node) { | |
| 226 node = CSSCalcValue::CreateExpressionNode( | |
| 227 node, | |
| 228 CSSCalcValue::CreateExpressionNode( | |
| 229 CSSPrimitiveValue::Create(std::abs(value), UnitFromIndex(i))), | |
| 230 value >= 0 ? kCalcAdd : kCalcSubtract); | |
| 231 } else { | |
| 232 node = CSSCalcValue::CreateExpressionNode( | |
| 233 CSSPrimitiveValue::Create(value, UnitFromIndex(i))); | |
| 234 } | |
| 235 } | |
| 236 return node; | |
| 237 } | |
| 238 | |
| 239 bool CSSCalcLength::UnitData::HasAtIndex(int i) const { | |
| 240 DCHECK_GE(i, 0); | |
| 241 DCHECK_LT(i, CSSLengthValue::kNumSupportedUnits); | |
| 242 return has_value_for_unit_[i]; | |
| 243 } | |
| 244 | |
| 245 bool CSSCalcLength::UnitData::Has(CSSPrimitiveValue::UnitType unit) const { | |
| 246 return HasAtIndex(IndexForUnit(unit)); | |
| 247 } | |
| 248 | |
| 249 void CSSCalcLength::UnitData::SetAtIndex(int i, double value) { | |
| 250 DCHECK_GE(i, 0); | |
| 251 DCHECK_LT(i, CSSLengthValue::kNumSupportedUnits); | |
| 252 has_value_for_unit_.set(i); | |
| 253 values_[i] = value; | |
| 254 } | |
| 255 | |
| 256 void CSSCalcLength::UnitData::Set(CSSPrimitiveValue::UnitType unit, | |
| 257 double value) { | |
| 258 SetAtIndex(IndexForUnit(unit), value); | |
| 259 } | |
| 260 | |
| 261 double CSSCalcLength::UnitData::GetAtIndex(int i) const { | |
| 262 DCHECK_GE(i, 0); | |
| 263 DCHECK_LT(i, CSSLengthValue::kNumSupportedUnits); | |
| 264 return values_[i]; | |
| 265 } | |
| 266 | |
| 267 double CSSCalcLength::UnitData::Get(CSSPrimitiveValue::UnitType unit) const { | |
| 268 return GetAtIndex(IndexForUnit(unit)); | |
| 269 } | |
| 270 | |
| 271 void CSSCalcLength::UnitData::Add(const CSSCalcLength::UnitData& right) { | |
| 272 for (int i = 0; i < CSSLengthValue::kNumSupportedUnits; ++i) { | |
| 273 if (right.HasAtIndex(i)) { | |
| 274 SetAtIndex(i, GetAtIndex(i) + right.GetAtIndex(i)); | |
| 275 } | |
| 276 } | |
| 277 } | |
| 278 | |
| 279 void CSSCalcLength::UnitData::Subtract(const CSSCalcLength::UnitData& right) { | |
| 280 for (int i = 0; i < CSSLengthValue::kNumSupportedUnits; ++i) { | |
| 281 if (right.HasAtIndex(i)) { | |
| 282 SetAtIndex(i, GetAtIndex(i) - right.GetAtIndex(i)); | |
| 283 } | |
| 284 } | |
| 285 } | |
| 286 | |
| 287 void CSSCalcLength::UnitData::Multiply(double x) { | |
| 288 for (int i = 0; i < CSSLengthValue::kNumSupportedUnits; ++i) { | |
| 289 if (HasAtIndex(i)) { | |
| 290 SetAtIndex(i, GetAtIndex(i) * x); | |
| 291 } | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 void CSSCalcLength::UnitData::Divide(double x) { | |
| 296 DCHECK_NE(x, 0); | |
| 297 for (int i = 0; i < CSSLengthValue::kNumSupportedUnits; ++i) { | |
| 298 if (HasAtIndex(i)) { | |
| 299 SetAtIndex(i, GetAtIndex(i) / x); | |
| 300 } | |
| 301 } | |
| 302 } | |
| 303 | |
| 304 } // namespace blink | |
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Chromium Code Reviews
Issue 2867883003:
[CSS Typed OM] Delete obsolete number and length classes from Typed OM (Closed)
