/**
* Pop the RTFDTM's context mark. This discards any RTFs added after the last mark was set.
*
* <p>If there is no RTF DTM, there's nothing to pop so this becomes a no-op. If pushes were
* issued before this was called, we count on the fact that popRewindMark is defined such that
* overpopping just resets to empty.
*
* <p>Complicating factor: We need to handle the case of popping back to a previous RTF DTM, if
* one of the weird produce-an-RTF-to-build-an-RTF cases arose. Basically: If pop says this DTM is
* now empty, then return to the previous if one exists, in whatever state we left it in. UGLY,
* but hopefully the situation which forces us to consider this will arise exceedingly rarely.
*/
public void popRTFContext() {
int previous = m_last_pushed_rtfdtm.pop();
if (null == m_rtfdtm_stack) return;
if (m_which_rtfdtm == previous) {
if (previous >= 0) // guard against none-active
{
boolean isEmpty = ((SAX2RTFDTM) (m_rtfdtm_stack.elementAt(previous))).popRewindMark();
}
} else
while (m_which_rtfdtm != previous) {
// Empty each DTM before popping, so it's ready for reuse
// _DON'T_ pop the previous, since it's still open (which is why we
// stacked up more of these) and did not receive a mark.
boolean isEmpty = ((SAX2RTFDTM) (m_rtfdtm_stack.elementAt(m_which_rtfdtm))).popRewindMark();
--m_which_rtfdtm;
}
}
/** Pop the current node that is the expression's context (i.e. for current() support). */
public final void popCurrentExpressionNode() {
m_currentExpressionNodes.quickPop(1);
}
/**
* Set the current node that is the expression's context (i.e. for current() support).
*
* @param n The sub-expression node to be current.
*/
public final void pushCurrentExpressionNode(int n) {
m_currentExpressionNodes.push(n);
}
/**
* Get the current node that is the expression's context (i.e. for current() support).
*
* @return The current sub-expression node.
*/
public final int getCurrentExpressionNode() {
return m_currentExpressionNodes.peek();
}
public final void popPredicatePos() {
m_predicatePos.pop();
}
public final void pushPredicatePos(int n) {
m_predicatePos.push(n);
}
public final int getPredicatePos() {
return m_predicatePos.peek();
}
/** Pop the current context node. */
public final void popCurrentNode() {
m_currentNodes.quickPop(1);
}
/**
* Set the current context node.
*
* @param n the <a href="http://www.w3.org/TR/xslt#dt-current-node">current node</a>.
*/
public final void pushCurrentNode(int n) {
m_currentNodes.push(n);
}
/** Pop the current context node, expression node, and prefix resolver. */
public final void popExpressionState() {
m_currentNodes.quickPop(1);
m_currentExpressionNodes.quickPop(1);
m_prefixResolvers.pop();
}
/**
* Push the current context node, expression node, and prefix resolver.
*
* @param cn the <a href="http://www.w3.org/TR/xslt#dt-current-node">current node</a>.
* @param en the sub-expression context node.
* @param nc the namespace context (prefix resolver.
*/
public final void pushExpressionState(int cn, int en, PrefixResolver nc) {
m_currentNodes.push(cn);
m_currentExpressionNodes.push(cn);
m_prefixResolvers.push(nc);
}
/**
* Set the current context node and expression node.
*
* @param cn the <a href="http://www.w3.org/TR/xslt#dt-current-node">current node</a>.
* @param en the sub-expression context node.
*/
public final void pushCurrentNodeAndExpression(int cn, int en) {
m_currentNodes.push(cn);
m_currentExpressionNodes.push(cn);
}
/**
* Get the current context node.
*
* @return the <a href="http://www.w3.org/TR/xslt#dt-current-node">current node</a>.
*/
public final int getCurrentNode() {
return m_currentNodes.peek();
}
/**
* Push the RTFDTM's context mark, to allows discarding RTFs added after this point. (If it
* doesn't exist we don't push, since we might still be able to get away with not creating it.
* That requires that excessive pops be harmless.)
*/
public void pushRTFContext() {
m_last_pushed_rtfdtm.push(m_which_rtfdtm);
if (null != m_rtfdtm_stack) ((SAX2RTFDTM) (getRTFDTM())).pushRewindMark();
}
