/*
* (non-Javadoc)
*
* @see
* com.itextpdf.tool.xml.pipeline.IPipeline#close(com.itextpdf.tool
* .xml.Tag, com.itextpdf.tool.xml.pipeline.ProcessObject)
*/
public override IPipeline Close(IWorkerContext context, Tag t, ProcessObject po)
{
HtmlPipelineContext hcc = (HtmlPipelineContext)GetLocalContext(context);
ITagProcessor tp;
try {
if (t.LastMarginBottom != null)
{
hcc.GetMemory()[HtmlPipelineContext.LAST_MARGIN_BOTTOM] = t.LastMarginBottom;
}
else
{
hcc.GetMemory().Remove(HtmlPipelineContext.LAST_MARGIN_BOTTOM);
}
tp = hcc.ResolveProcessor(t.Name, t.NameSpace);
IList <IElement> elems = null;
if (tp.IsStackOwner())
{
// remove the element from the StackKeeper Queue if end tag is
// found
StackKeeper tagStack;
try {
tagStack = hcc.Poll();
} catch (NoStackException e) {
throw new PipelineException(String.Format(LocaleMessages.GetInstance().GetMessage(LocaleMessages.STACK_404), t.ToString()), e);
}
elems = tp.EndElement(context, t, tagStack.GetElements());
}
else
{
elems = tp.EndElement(context, t, hcc.CurrentContent());
hcc.CurrentContent().Clear();
}
if (elems.Count > 0)
{
StackKeeper stack = hcc.Peek();
if (stack != null)
{
foreach (IElement elem in elems)
{
stack.Add(elem);
}
}
else
{
WritableElement writableElement = new WritableElement();
po.Add(writableElement);
writableElement.AddAll(elems);
}
}
} catch (NoTagProcessorException e) {
if (!hcc.AcceptUnknown())
{
throw e;
}
}
return(GetNext());
}
/*
* (non-Javadoc)
*
* @see
* com.itextpdf.tool.xml.pipeline.IPipeline#open(com.itextpdf.tool.
* xml.Tag, com.itextpdf.tool.xml.pipeline.ProcessObject)
*/
public override IPipeline Open(IWorkerContext context, Tag t, ProcessObject po)
{
HtmlPipelineContext hcc = (HtmlPipelineContext)GetLocalContext(context);
try {
Object lastMarginBottom = null;
if (hcc.GetMemory().TryGetValue(HtmlPipelineContext.LAST_MARGIN_BOTTOM, out lastMarginBottom))
{
t.LastMarginBottom = lastMarginBottom;
hcc.GetMemory().Remove(HtmlPipelineContext.LAST_MARGIN_BOTTOM);
}
ITagProcessor tp = hcc.ResolveProcessor(t.Name, t.NameSpace);
if (tp.IsStackOwner())
{
hcc.AddFirst(new StackKeeper(t));
}
IList <IElement> content = tp.StartElement(context, t);
if (content.Count > 0)
{
if (tp.IsStackOwner())
{
StackKeeper peek;
try {
peek = hcc.Peek();
foreach (IElement elem in content)
{
peek.Add(elem);
}
} catch (NoStackException e) {
throw new PipelineException(String.Format(LocaleMessages.STACK_404, t.ToString()), e);
}
}
else
{
foreach (IElement elem in content)
{
hcc.CurrentContent().Add(elem);
if (elem.Type == Element.BODY)
{
WritableElement writableElement = new WritableElement();
writableElement.Add(elem);
po.Add(writableElement);
hcc.CurrentContent().Remove(elem);
}
}
}
}
} catch (NoTagProcessorException e) {
if (!hcc.AcceptUnknown())
{
throw e;
}
}
return(GetNext());
}
/**
* Calculates the margin top or spacingBefore based on the given value and the last margin bottom.
* <br /><br />
* In HTML the margin-bottom of a tag overlaps with the margin-top of a following tag.
* This method simulates this behavior by subtracting the margin-top value of the given tag from the margin-bottom of the previous tag. The remaining value is returned or if the margin-bottom value is the largest, 0 is returned
* @param value float containing the margin-top value.
* @param configuration XmlWorkerConfig containing the last margin bottom.
* @return an offset
*/
public float CalculateMarginTop(float value, HtmlPipelineContext configuration)
{
float marginTop = value;
IDictionary<String, Object> memory = configuration.GetMemory();
Object mb;
memory.TryGetValue(HtmlPipelineContext.LAST_MARGIN_BOTTOM, out mb);
if (mb != null) {
float marginBottom = (float)mb;
marginTop = (marginTop>marginBottom)?marginTop-marginBottom:0;
}
return marginTop;
}