nsresult
HTMLFrameSetElement::GetColSpec(int32_t *aNumValues,
const nsFramesetSpec** aSpecs)
{
NS_PRECONDITION(aNumValues, "Must have a pointer to an integer here!");
NS_PRECONDITION(aSpecs, "Must have a pointer to an array of nsFramesetSpecs");
*aNumValues = 0;
*aSpecs = nullptr;
if (!mColSpecs) {
const nsAttrValue* value = GetParsedAttr(nsGkAtoms::cols);
if (value && value->Type() == nsAttrValue::eString) {
nsresult rv = ParseRowCol(value->GetStringValue(), mNumCols,
&mColSpecs);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!mColSpecs) { // we may not have had an attr or had an empty attr
mColSpecs = MakeUnique<nsFramesetSpec[]>(1);
mNumCols = 1;
mColSpecs[0].mUnit = eFramesetUnit_Relative;
mColSpecs[0].mValue = 1;
}
}
*aSpecs = mColSpecs.get();
*aNumValues = mNumCols;
return NS_OK;
}
nsresult
HTMLFrameSetElement::GetRowSpec(int32_t *aNumValues,
const nsFramesetSpec** aSpecs)
{
NS_PRECONDITION(aNumValues, "Must have a pointer to an integer here!");
NS_PRECONDITION(aSpecs, "Must have a pointer to an array of nsFramesetSpecs");
*aNumValues = 0;
*aSpecs = nullptr;
if (!mRowSpecs) {
const nsAttrValue* value = GetParsedAttr(nsGkAtoms::rows);
if (value && value->Type() == nsAttrValue::eString) {
nsresult rv = ParseRowCol(value->GetStringValue(), mNumRows,
getter_Transfers(mRowSpecs));
NS_ENSURE_SUCCESS(rv, rv);
}
if (!mRowSpecs) { // we may not have had an attr or had an empty attr
mRowSpecs = new nsFramesetSpec[1];
if (!mRowSpecs) {
mNumRows = 0;
return NS_ERROR_OUT_OF_MEMORY;
}
mNumRows = 1;
mRowSpecs[0].mUnit = eFramesetUnit_Relative;
mRowSpecs[0].mValue = 1;
}
}
*aSpecs = mRowSpecs;
*aNumValues = mNumRows;
return NS_OK;
}
nsresult
HTMLFrameSetElement::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName,
const nsAttrValueOrString* aValue,
bool aNotify)
{
/* The main goal here is to see whether the _number_ of rows or
* columns has changed. If it has, we need to reframe; otherwise
* we want to reflow.
* Ideally, the style hint would be changed back to reflow after the reframe
* has been performed. Unfortunately, however, the reframe will be performed
* by the call to nsNodeUtils::AttributeChanged, which occurs *after*
* AfterSetAttr is called, leaving us with no convenient way of changing the
* value back to reflow afterwards. However, nsNodeUtils::AttributeChanged is
* effectively the only consumer of this value, so as long as we always set
* the value correctly here, we should be fine.
*/
mCurrentRowColHint = NS_STYLE_HINT_REFLOW;
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::rows) {
if (aValue) {
int32_t oldRows = mNumRows;
ParseRowCol(aValue->String(), mNumRows, &mRowSpecs);
if (mNumRows != oldRows) {
mCurrentRowColHint = nsChangeHint_ReconstructFrame;
}
}
} else if (aName == nsGkAtoms::cols) {
if (aValue) {
int32_t oldCols = mNumCols;
ParseRowCol(aValue->String(), mNumCols, &mColSpecs);
if (mNumCols != oldCols) {
mCurrentRowColHint = nsChangeHint_ReconstructFrame;
}
}
}
}
return nsGenericHTMLElement::BeforeSetAttr(aNamespaceID, aName, aValue, aNotify);
}
nsresult
HTMLFrameSetElement::SetAttr(int32_t aNameSpaceID,
nsIAtom* aAttribute,
nsIAtom* aPrefix,
const nsAString& aValue,
bool aNotify)
{
nsresult rv;
/* The main goal here is to see whether the _number_ of rows or
* columns has changed. If it has, we need to reframe; otherwise
* we want to reflow. So we set mCurrentRowColHint here, then call
* nsGenericHTMLElement::SetAttr, which will end up calling
* GetAttributeChangeHint and notifying layout with that hint.
* Once nsGenericHTMLElement::SetAttr returns, we want to go back to our
* normal hint, which is NS_STYLE_HINT_REFLOW.
*/
if (aAttribute == nsGkAtoms::rows && aNameSpaceID == kNameSpaceID_None) {
int32_t oldRows = mNumRows;
ParseRowCol(aValue, mNumRows, &mRowSpecs);
if (mNumRows != oldRows) {
mCurrentRowColHint = nsChangeHint_ReconstructFrame;
}
} else if (aAttribute == nsGkAtoms::cols &&
aNameSpaceID == kNameSpaceID_None) {
int32_t oldCols = mNumCols;
ParseRowCol(aValue, mNumCols, &mColSpecs);
if (mNumCols != oldCols) {
mCurrentRowColHint = nsChangeHint_ReconstructFrame;
}
}
rv = nsGenericHTMLElement::SetAttr(aNameSpaceID, aAttribute, aPrefix,
aValue, aNotify);
mCurrentRowColHint = NS_STYLE_HINT_REFLOW;
return rv;
}
