Beispiel #1
0
void
nsCSSCompressedDataBlock::MapRuleInfoInto(nsRuleData *aRuleData) const
{
    // If we have no data for these structs, then return immediately.
    // This optimization should make us return most of the time, so we
    // have to worry much less (although still some) about the speed of
    // the rest of the function.
    if (!(aRuleData->mSIDs & mStyleBits))
        return;

    nsIDocument* doc = aRuleData->mPresContext->Document();

    const char* cursor = Block();
    const char* cursor_end = BlockEnd();
    while (cursor < cursor_end) {
        nsCSSProperty iProp = PropertyAtCursor(cursor);
        NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(iProp), "out of range");
        if (nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]) &
            aRuleData->mSIDs) {
            nsCSSValue* target = aRuleData->ValueFor(iProp);
            if (target->GetUnit() == eCSSUnit_Null) {
                const nsCSSValue *val = ValueAtCursor(cursor);
                NS_ABORT_IF_FALSE(val->GetUnit() != eCSSUnit_Null, "oops");
                if (ShouldStartImageLoads(aRuleData, iProp)) {
                    TryToStartImageLoad(*val, doc, iProp);
                }
                *target = *val;
                if (nsCSSProps::PropHasFlags(iProp,
                        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED) &&
                    ShouldIgnoreColors(aRuleData))
                {
                    if (iProp == eCSSProperty_background_color) {
                        // Force non-'transparent' background
                        // colors to the user's default.
                        if (target->IsNonTransparentColor()) {
                            target->SetColorValue(aRuleData->mPresContext->
                                                  DefaultBackgroundColor());
                        }
                    } else {
                        // Ignore 'color', 'border-*-color', etc.
                        *target = nsCSSValue();
                    }
                }
            }
        }
        cursor += CDBValueStorage_advance;
    }
    NS_ABORT_IF_FALSE(cursor == cursor_end, "inconsistent data");
}
static void
TryToStartImageLoad(const nsCSSValue& aValue, nsIDocument* aDocument,
                    nsCSSProperty aProperty)
{
  if (aValue.GetUnit() == eCSSUnit_List) {
    for (const nsCSSValueList* l = aValue.GetListValue(); l; l = l->mNext) {
      TryToStartImageLoad(l->mValue, aDocument, aProperty);
    }
  } else if (nsCSSProps::PropHasFlags(aProperty,
                                      CSS_PROPERTY_IMAGE_IS_IN_ARRAY_0)) {
    if (aValue.GetUnit() == eCSSUnit_Array) {
      TryToStartImageLoadOnValue(aValue.GetArrayValue()->Item(0), aDocument);
    }
  } else {
    TryToStartImageLoadOnValue(aValue, aDocument);
  }
}