layout/style/nsStyleCoord.cpp

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  37
  38 /* representation of length values in computed style data */
  39
  40 #include "nsStyleCoord.h"
  41 #include "nsString.h"
  42 #include "nsCRT.h"
  43
  44 nsStyleCoord::nsStyleCoord(nsStyleUnit aUnit)
  45   : mUnit(aUnit)
  46 {
  47   NS_ASSERTION(aUnit < eStyleUnit_Percent, "not a valueless unit");
  48   if (aUnit >= eStyleUnit_Percent) {
  49     mUnit = eStyleUnit_Null;
  50   }
  51   mValue.mInt = 0;
  52 }
  53
  54 nsStyleCoord::nsStyleCoord(nscoord aValue)
  55   : mUnit(eStyleUnit_Coord)
  56 {
  57   mValue.mInt = aValue;
  58 }
  59
  60 nsStyleCoord::nsStyleCoord(PRInt32 aValue, nsStyleUnit aUnit)
  61   : mUnit(aUnit)
  62 {
  63   //if you want to pass in eStyleUnit_Coord, don't. instead, use the
  64   //constructor just above this one... MMP
  65   NS_ASSERTION((aUnit == eStyleUnit_Enumerated) ||
  66                (aUnit == eStyleUnit_Integer), "not an int value");
  67   if ((aUnit == eStyleUnit_Enumerated) ||
  68       (aUnit == eStyleUnit_Integer)) {
  69     mValue.mInt = aValue;
  70   }
  71   else {
  72     mUnit = eStyleUnit_Null;
  73     mValue.mInt = 0;
  74   }
  75 }
  76
  77 nsStyleCoord::nsStyleCoord(float aValue, nsStyleUnit aUnit)
  78   : mUnit(aUnit)
  79 {
  80   NS_ASSERTION((aUnit == eStyleUnit_Percent) ||
  81                (aUnit == eStyleUnit_Factor), "not a float value");
  82   if ((aUnit == eStyleUnit_Percent) ||
  83       (aUnit == eStyleUnit_Factor)) {
  84     mValue.mFloat = aValue;
  85   }
  86   else {
  87     mUnit = eStyleUnit_Null;
  88     mValue.mInt = 0;
  89   }
  90 }
  91
  92 nsStyleCoord& nsStyleCoord::operator=(const nsStyleCoord& aCopy)
  93 {
  94   mUnit = aCopy.mUnit;
  95   if ((eStyleUnit_Percent <= mUnit) && (mUnit < eStyleUnit_Coord)) {
  96     mValue.mFloat = aCopy.mValue.mFloat;
  97   }
  98   else {
  99     mValue.mInt = aCopy.mValue.mInt;
 100   }
 101   return *this;
 102 }
 103
 104 PRBool nsStyleCoord::operator==(const nsStyleCoord& aOther) const
 105 {
 106   if (mUnit == aOther.mUnit) {
 107     if ((eStyleUnit_Percent <= mUnit) && (mUnit < eStyleUnit_Coord)) {
 108       return PRBool(mValue.mFloat == aOther.mValue.mFloat);
 109     }
 110     else {
 111       return PRBool(mValue.mInt == aOther.mValue.mInt);
 112     }
 113   }
 114   return PR_FALSE;
 115 }
 116
 117 void nsStyleCoord::Reset(void)
 118 {
 119   mUnit = eStyleUnit_Null;
 120   mValue.mInt = 0;
 121 }
 122
 123 void nsStyleCoord::SetCoordValue(nscoord aValue)
 124 {
 125   mUnit = eStyleUnit_Coord;
 126   mValue.mInt = aValue;
 127 }
 128
 129 void nsStyleCoord::SetIntValue(PRInt32 aValue, nsStyleUnit aUnit)
 130 {
 131   NS_ASSERTION((aUnit == eStyleUnit_Enumerated) ||
 132                (aUnit == eStyleUnit_Integer), "not an int value");
 133   if ((aUnit == eStyleUnit_Enumerated) ||
 134       (aUnit == eStyleUnit_Integer)) {
 135     mUnit = aUnit;
 136     mValue.mInt = aValue;
 137   }
 138   else {
 139     Reset();
 140   }
 141 }
 142
 143 void nsStyleCoord::SetPercentValue(float aValue)
 144 {
 145   mUnit = eStyleUnit_Percent;
 146   mValue.mFloat = aValue;
 147 }
 148
 149 void nsStyleCoord::SetFactorValue(float aValue)
 150 {
 151   mUnit = eStyleUnit_Factor;
 152   mValue.mFloat = aValue;
 153 }
 154
 155 void nsStyleCoord::SetNormalValue(void)
 156 {
 157   mUnit = eStyleUnit_Normal;
 158   mValue.mInt = 0;
 159 }
 160
 161 void nsStyleCoord::SetAutoValue(void)
 162 {
 163   mUnit = eStyleUnit_Auto;
 164   mValue.mInt = 0;
 165 }
 166
 167 void nsStyleCoord::SetNoneValue(void)
 168 {
 169   mUnit = eStyleUnit_None;
 170   mValue.mInt = 0;
 171 }
 172
 173 void nsStyleCoord::AppendToString(nsString& aBuffer) const
 174 {
 175   if ((eStyleUnit_Percent <= mUnit) && (mUnit < eStyleUnit_Coord)) {
 176     aBuffer.AppendFloat(mValue.mFloat);
 177   }
 178   else if ((eStyleUnit_Coord == mUnit) ||
 179            (eStyleUnit_Enumerated == mUnit) ||
 180            (eStyleUnit_Integer == mUnit)) {
 181     aBuffer.AppendInt(mValue.mInt, 10);
 182     aBuffer.AppendLiteral("[0x");
 183     aBuffer.AppendInt(mValue.mInt, 16);
 184     aBuffer.Append(PRUnichar(']'));
 185   }
 186
 187   switch (mUnit) {
 188     case eStyleUnit_Null:         aBuffer.AppendLiteral("Null");     break;
 189     case eStyleUnit_Coord:        aBuffer.AppendLiteral("tw");       break;
 190     case eStyleUnit_Percent:      aBuffer.AppendLiteral("%");        break;
 191     case eStyleUnit_Factor:       aBuffer.AppendLiteral("f");        break;
 192     case eStyleUnit_Normal:       aBuffer.AppendLiteral("Normal");   break;
 193     case eStyleUnit_Auto:         aBuffer.AppendLiteral("Auto");     break;
 194     case eStyleUnit_None:         aBuffer.AppendLiteral("None");     break;
 195     case eStyleUnit_Enumerated:   aBuffer.AppendLiteral("enum");     break;
 196     case eStyleUnit_Integer:      aBuffer.AppendLiteral("int");      break;
 197   }
 198   aBuffer.Append(PRUnichar(' '));
 199 }
 200
 201 void nsStyleCoord::ToString(nsString& aBuffer) const
 202 {
 203   aBuffer.Truncate();
 204   AppendToString(aBuffer);
 205 }
 206
 207
 208
 209
 210 nsStyleSides::nsStyleSides(void)
 211 {
 212   memset(this, 0x00, sizeof(nsStyleSides));
 213 }
 214
 215 #define COMPARE_SIDE(side)                                                    \
 216   if ((eStyleUnit_Percent <= mUnits[side]) &&                                 \
 217       (mUnits[side] < eStyleUnit_Coord)) {                                    \
 218     if (mValues[side].mFloat != aOther.mValues[side].mFloat)                  \
 219       return PR_FALSE;                                                        \
 220   }                                                                           \
 221   else {                                                                      \
 222     if (mValues[side].mInt != aOther.mValues[side].mInt)                      \
 223       return PR_FALSE;                                                        \
 224   }
 225
 226 PRBool nsStyleSides::operator==(const nsStyleSides& aOther) const
 227 {
 228   if ((mUnits[NS_SIDE_LEFT] == aOther.mUnits[NS_SIDE_LEFT]) &&
 229       (mUnits[NS_SIDE_TOP] == aOther.mUnits[NS_SIDE_TOP]) &&
 230       (mUnits[NS_SIDE_RIGHT] == aOther.mUnits[NS_SIDE_RIGHT]) &&
 231       (mUnits[NS_SIDE_BOTTOM] == aOther.mUnits[NS_SIDE_BOTTOM])) {
 232     COMPARE_SIDE(NS_SIDE_LEFT);
 233     COMPARE_SIDE(NS_SIDE_TOP);
 234     COMPARE_SIDE(NS_SIDE_RIGHT);
 235     COMPARE_SIDE(NS_SIDE_BOTTOM);
 236     return PR_TRUE;
 237   }
 238   return PR_FALSE;
 239 }
 240
 241 void nsStyleSides::Reset(void)
 242 {
 243   memset(this, 0x00, sizeof(nsStyleSides));
 244 }
 245
 246 void nsStyleSides::AppendToString(nsString& aBuffer) const
 247 {
 248   aBuffer.AppendLiteral("left: ");
 249   GetLeft().AppendToString(aBuffer);
 250
 251   aBuffer.AppendLiteral("top: ");
 252   GetTop().AppendToString(aBuffer);
 253
 254   aBuffer.AppendLiteral("right: ");
 255   GetRight().AppendToString(aBuffer);
 256
 257   aBuffer.AppendLiteral("bottom: ");
 258   GetBottom().AppendToString(aBuffer);
 259 }
 260
 261 void nsStyleSides::ToString(nsString& aBuffer) const
 262 {
 263   aBuffer.Truncate();
 264   AppendToString(aBuffer);
 265 }
 266