/// <summary><inheritDoc/></summary>
protected internal override LayoutArea UpdateCurrentArea(LayoutResult overflowResult)
{
if (currentArea == null)
{
currentArea = new RootLayoutArea(0, canvas.GetRootArea().Clone());
}
else
{
SetProperty(Property.FULL, true);
currentArea = null;
}
return(currentArea);
}
protected internal override LayoutArea UpdateCurrentArea(LayoutResult overflowResult)
{
if (overflowResult != null && overflowResult.GetAreaBreak() != null && overflowResult.GetAreaBreak().GetAreaType
() != AreaBreakType.NEXT_AREA)
{
nextAreaNumber = 0;
}
if (nextAreaNumber % columns.Length == 0)
{
base.UpdateCurrentArea(overflowResult);
}
return(currentArea = new RootLayoutArea(currentPageNumber, columns[nextAreaNumber++ % columns.Length].Clone
()));
}
/// <summary><inheritDoc/></summary>
protected internal override LayoutArea UpdateCurrentArea(LayoutResult overflowResult)
{
if (currentArea == null)
{
int pageNumber = canvas.IsCanvasOfPage() ? canvas.GetPdfDocument().GetPageNumber(canvas.GetPage()) : 0;
currentArea = new RootLayoutArea(pageNumber, canvas.GetRootArea().Clone());
}
else
{
SetProperty(Property.FULL, true);
currentArea = null;
}
return(currentArea);
}
public virtual bool AttemptGoForwardToStoredNextState(RootRenderer rootRenderer)
{
if (storedNextArea != null)
{
rootRenderer.currentArea = storedNextArea;
rootRenderer.currentPageNumber = storedNextArea.GetPageNumber();
rootRenderer.floatRendererAreas = storedNextFloatRenderAreas;
storedNextArea = null;
storedNextFloatRenderAreas = null;
return(true);
}
else
{
return(false);
}
}
public virtual bool AttemptGoBackToStoredPreviousStateAndStoreNextState(RootRenderer rootRenderer)
{
bool result = false;
if (storedPreviousArea != null)
{
storedNextArea = rootRenderer.currentArea;
rootRenderer.currentArea = storedPreviousArea;
rootRenderer.currentPageNumber = storedPreviousArea.GetPageNumber();
storedNextFloatRenderAreas = new List <Rectangle>(rootRenderer.floatRendererAreas);
rootRenderer.floatRendererAreas = storedPreviousFloatRenderAreas;
storedPreviousFloatRenderAreas = null;
storedPreviousArea = null;
result = true;
}
return(result);
}
protected override LayoutArea UpdateCurrentArea(LayoutResult overflowResult)
{
if (nextAreaNumber % 2 == 0)
{
currentPageNumber = base.UpdateCurrentArea(overflowResult).GetPageNumber();
}
else
{
new PdfCanvas(document.GetPdfDocument(), document.GetPdfDocument().GetNumberOfPages())
.MoveTo(297.5f, 36)
.LineTo(297.5f, 806)
.Stroke();
}
currentArea = new RootLayoutArea(currentPageNumber, COLUMNS[nextAreaNumber % 2].Clone());
nextAreaNumber++;
return(currentArea);
}
protected internal override LayoutArea UpdateCurrentArea(LayoutResult overflowResult)
{
FlushWaitingDrawingElements();
LayoutTaggingHelper taggingHelper = this.GetProperty <LayoutTaggingHelper>(Property.TAGGING_HELPER);
if (taggingHelper != null)
{
taggingHelper.ReleaseFinishedHints();
}
AreaBreak areaBreak = overflowResult != null && overflowResult.GetAreaBreak() != null?overflowResult.GetAreaBreak
() : null;
if (areaBreak != null && areaBreak.GetAreaType() == AreaBreakType.LAST_PAGE)
{
while (currentPageNumber < document.GetPdfDocument().GetNumberOfPages())
{
MoveToNextPage();
}
}
else
{
MoveToNextPage();
}
PageSize customPageSize = areaBreak != null?areaBreak.GetPageSize() : null;
while (document.GetPdfDocument().GetNumberOfPages() >= currentPageNumber && document.GetPdfDocument().GetPage
(currentPageNumber).IsFlushed())
{
currentPageNumber++;
}
PageSize lastPageSize = EnsureDocumentHasNPages(currentPageNumber, customPageSize);
if (lastPageSize == null)
{
lastPageSize = new PageSize(document.GetPdfDocument().GetPage(currentPageNumber).GetTrimBox());
}
return(currentArea = new RootLayoutArea(currentPageNumber, GetCurrentPageEffectiveArea(lastPageSize)));
}
public override void AddChild(IRenderer renderer)
{
LayoutTaggingHelper taggingHelper = this.GetProperty <LayoutTaggingHelper>(Property.TAGGING_HELPER);
if (taggingHelper != null)
{
LayoutTaggingHelper.AddTreeHints(taggingHelper, renderer);
}
// Some positioned renderers might have been fetched from non-positioned child and added to this renderer,
// so we use this generic mechanism of determining which renderers have been just added.
int numberOfChildRenderers = childRenderers.Count;
int numberOfPositionedChildRenderers = positionedRenderers.Count;
base.AddChild(renderer);
IList <IRenderer> addedRenderers = new List <IRenderer>(1);
IList <IRenderer> addedPositionedRenderers = new List <IRenderer>(1);
while (childRenderers.Count > numberOfChildRenderers)
{
addedRenderers.Add(childRenderers[numberOfChildRenderers]);
childRenderers.JRemoveAt(numberOfChildRenderers);
}
while (positionedRenderers.Count > numberOfPositionedChildRenderers)
{
addedPositionedRenderers.Add(positionedRenderers[numberOfPositionedChildRenderers]);
positionedRenderers.JRemoveAt(numberOfPositionedChildRenderers);
}
bool marginsCollapsingEnabled = true.Equals(GetPropertyAsBoolean(Property.COLLAPSING_MARGINS));
if (currentArea == null)
{
UpdateCurrentAndInitialArea(null);
if (marginsCollapsingEnabled)
{
marginsCollapseHandler = new MarginsCollapseHandler(this, null);
}
}
// Static layout
for (int i = 0; currentArea != null && i < addedRenderers.Count; i++)
{
renderer = addedRenderers[i];
bool rendererIsFloat = FloatingHelper.IsRendererFloating(renderer);
bool clearanceOverflowsToNextPage = FloatingHelper.IsClearanceApplied(waitingNextPageRenderers, renderer.GetProperty
<ClearPropertyValue?>(Property.CLEAR));
if (rendererIsFloat && (floatOverflowedCompletely || clearanceOverflowsToNextPage))
{
waitingNextPageRenderers.Add(renderer);
floatOverflowedCompletely = true;
continue;
}
ProcessWaitingKeepWithNextElement(renderer);
IList <IRenderer> resultRenderers = new List <IRenderer>();
LayoutResult result = null;
RootLayoutArea storedArea = null;
RootLayoutArea nextStoredArea = null;
MarginsCollapseInfo childMarginsInfo = null;
if (marginsCollapsingEnabled && currentArea != null && renderer != null)
{
childMarginsInfo = marginsCollapseHandler.StartChildMarginsHandling(renderer, currentArea.GetBBox());
}
while (clearanceOverflowsToNextPage || currentArea != null && renderer != null && (result = renderer.SetParent
(this).Layout(new LayoutContext(currentArea.Clone(), childMarginsInfo, floatRendererAreas))).GetStatus
() != LayoutResult.FULL)
{
bool currentAreaNeedsToBeUpdated = false;
if (clearanceOverflowsToNextPage)
{
result = new LayoutResult(LayoutResult.NOTHING, null, null, renderer);
currentAreaNeedsToBeUpdated = true;
}
if (result.GetStatus() == LayoutResult.PARTIAL)
{
if (rendererIsFloat)
{
waitingNextPageRenderers.Add(result.GetOverflowRenderer());
break;
}
else
{
ProcessRenderer(result.GetSplitRenderer(), resultRenderers);
if (nextStoredArea != null)
{
currentArea = nextStoredArea;
currentPageNumber = nextStoredArea.GetPageNumber();
nextStoredArea = null;
}
else
{
currentAreaNeedsToBeUpdated = true;
}
}
}
else
{
if (result.GetStatus() == LayoutResult.NOTHING && !clearanceOverflowsToNextPage)
{
if (result.GetOverflowRenderer() is ImageRenderer)
{
float imgHeight = ((ImageRenderer)result.GetOverflowRenderer()).GetOccupiedArea().GetBBox().GetHeight();
if (!floatRendererAreas.IsEmpty() || currentArea.GetBBox().GetHeight() < imgHeight && !currentArea.IsEmptyArea
())
{
if (rendererIsFloat)
{
waitingNextPageRenderers.Add(result.GetOverflowRenderer());
floatOverflowedCompletely = true;
break;
}
currentAreaNeedsToBeUpdated = true;
}
else
{
((ImageRenderer)result.GetOverflowRenderer()).AutoScale(currentArea);
result.GetOverflowRenderer().SetProperty(Property.FORCED_PLACEMENT, true);
ILog logger = LogManager.GetLogger(typeof(RootRenderer));
logger.Warn(MessageFormatUtil.Format(iText.IO.LogMessageConstant.ELEMENT_DOES_NOT_FIT_AREA, ""));
}
}
else
{
if (currentArea.IsEmptyArea() && result.GetAreaBreak() == null)
{
if (true.Equals(result.GetOverflowRenderer().GetModelElement().GetProperty <bool?>(Property.KEEP_TOGETHER))
)
{
result.GetOverflowRenderer().GetModelElement().SetProperty(Property.KEEP_TOGETHER, false);
ILog logger = LogManager.GetLogger(typeof(RootRenderer));
logger.Warn(MessageFormatUtil.Format(iText.IO.LogMessageConstant.ELEMENT_DOES_NOT_FIT_AREA, "KeepTogether property will be ignored."
));
if (storedArea != null)
{
nextStoredArea = currentArea;
currentArea = storedArea;
currentPageNumber = storedArea.GetPageNumber();
}
storedArea = currentArea;
}
else
{
if (null != result.GetCauseOfNothing() && true.Equals(result.GetCauseOfNothing().GetProperty <bool?>(Property
.KEEP_TOGETHER)))
{
// set KEEP_TOGETHER false on the deepest parent (maybe the element itself) to have KEEP_TOGETHER == true
IRenderer theDeepestKeptTogether = result.GetCauseOfNothing();
IRenderer parent;
while (null == theDeepestKeptTogether.GetModelElement() || null == theDeepestKeptTogether.GetModelElement(
).GetOwnProperty <bool?>(Property.KEEP_TOGETHER))
{
parent = ((AbstractRenderer)theDeepestKeptTogether).parent;
if (parent == null)
{
break;
}
theDeepestKeptTogether = parent;
}
theDeepestKeptTogether.GetModelElement().SetProperty(Property.KEEP_TOGETHER, false);
ILog logger = LogManager.GetLogger(typeof(RootRenderer));
logger.Warn(MessageFormatUtil.Format(iText.IO.LogMessageConstant.ELEMENT_DOES_NOT_FIT_AREA, "KeepTogether property of inner element will be ignored."
));
}
else
{
if (!true.Equals(renderer.GetProperty <bool?>(Property.FORCED_PLACEMENT)))
{
result.GetOverflowRenderer().SetProperty(Property.FORCED_PLACEMENT, true);
ILog logger = LogManager.GetLogger(typeof(RootRenderer));
logger.Warn(MessageFormatUtil.Format(iText.IO.LogMessageConstant.ELEMENT_DOES_NOT_FIT_AREA, ""));
}
else
{
// FORCED_PLACEMENT was already set to the renderer and
// LogMessageConstant.ELEMENT_DOES_NOT_FIT_AREA message was logged.
// This else-clause should never be hit, otherwise there is a bug in FORCED_PLACEMENT implementation.
System.Diagnostics.Debug.Assert(false);
// Still handling this case in order to avoid nasty infinite loops.
break;
}
}
}
}
else
{
storedArea = currentArea;
if (nextStoredArea != null)
{
currentArea = nextStoredArea;
currentPageNumber = nextStoredArea.GetPageNumber();
nextStoredArea = null;
}
else
{
if (rendererIsFloat)
{
waitingNextPageRenderers.Add(result.GetOverflowRenderer());
floatOverflowedCompletely = true;
break;
}
currentAreaNeedsToBeUpdated = true;
}
}
}
}
}
renderer = result.GetOverflowRenderer();
if (marginsCollapsingEnabled)
{
marginsCollapseHandler.EndChildMarginsHandling(currentArea.GetBBox());
}
if (currentAreaNeedsToBeUpdated)
{
UpdateCurrentAndInitialArea(result);
}
if (marginsCollapsingEnabled)
{
marginsCollapseHandler = new MarginsCollapseHandler(this, null);
childMarginsInfo = marginsCollapseHandler.StartChildMarginsHandling(renderer, currentArea.GetBBox());
}
clearanceOverflowsToNextPage = clearanceOverflowsToNextPage && FloatingHelper.IsClearanceApplied(waitingNextPageRenderers
, renderer.GetProperty <ClearPropertyValue?>(Property.CLEAR));
}
if (marginsCollapsingEnabled)
{
marginsCollapseHandler.EndChildMarginsHandling(currentArea.GetBBox());
}
if (null != result && null != result.GetSplitRenderer())
{
renderer = result.GetSplitRenderer();
}
// Keep renderer until next element is added for future keep with next adjustments
if (renderer != null && result != null)
{
if (true.Equals(renderer.GetProperty <bool?>(Property.KEEP_WITH_NEXT)))
{
if (true.Equals(renderer.GetProperty <bool?>(Property.FORCED_PLACEMENT)))
{
ILog logger = LogManager.GetLogger(typeof(RootRenderer));
logger.Warn(iText.IO.LogMessageConstant.ELEMENT_WAS_FORCE_PLACED_KEEP_WITH_NEXT_WILL_BE_IGNORED);
ShrinkCurrentAreaAndProcessRenderer(renderer, resultRenderers, result);
}
else
{
keepWithNextHangingRenderer = renderer;
keepWithNextHangingRendererLayoutResult = result;
}
}
else
{
if (result.GetStatus() != LayoutResult.NOTHING)
{
ShrinkCurrentAreaAndProcessRenderer(renderer, resultRenderers, result);
}
}
}
}
for (int i = 0; i < addedPositionedRenderers.Count; i++)
{
positionedRenderers.Add(addedPositionedRenderers[i]);
renderer = positionedRenderers[positionedRenderers.Count - 1];
int?positionedPageNumber = renderer.GetProperty <int?>(Property.PAGE_NUMBER);
if (positionedPageNumber == null)
{
positionedPageNumber = currentPageNumber;
}
LayoutArea layoutArea;
// For position=absolute, if none of the top, bottom, left, right properties are provided,
// the content should be displayed in the flow of the current content, not overlapping it.
// The behavior is just if it would be statically positioned except it does not affect other elements
if (Convert.ToInt32(LayoutPosition.ABSOLUTE).Equals(renderer.GetProperty <int?>(Property.POSITION)) && AbstractRenderer
.NoAbsolutePositionInfo(renderer))
{
layoutArea = new LayoutArea((int)positionedPageNumber, currentArea.GetBBox().Clone());
}
else
{
layoutArea = new LayoutArea((int)positionedPageNumber, initialCurrentArea.GetBBox().Clone());
}
Rectangle fullBbox = layoutArea.GetBBox().Clone();
PreparePositionedRendererAndAreaForLayout(renderer, fullBbox, layoutArea.GetBBox());
renderer.Layout(new PositionedLayoutContext(new LayoutArea(layoutArea.GetPageNumber(), fullBbox), layoutArea
));
if (immediateFlush)
{
FlushSingleRenderer(renderer);
positionedRenderers.JRemoveAt(positionedRenderers.Count - 1);
}
}
}
private void ProcessWaitingKeepWithNextElement(IRenderer renderer)
{
if (keepWithNextHangingRenderer != null)
{
LayoutArea rest = currentArea.Clone();
rest.GetBBox().SetHeight(rest.GetBBox().GetHeight() - keepWithNextHangingRendererLayoutResult.GetOccupiedArea
().GetBBox().GetHeight());
bool ableToProcessKeepWithNext = false;
if (renderer.SetParent(this).Layout(new LayoutContext(rest)).GetStatus() != LayoutResult.NOTHING)
{
// The area break will not be introduced and we are safe to place everything as is
ShrinkCurrentAreaAndProcessRenderer(keepWithNextHangingRenderer, new List <IRenderer>(), keepWithNextHangingRendererLayoutResult
);
ableToProcessKeepWithNext = true;
}
else
{
float originalElementHeight = keepWithNextHangingRendererLayoutResult.GetOccupiedArea().GetBBox().GetHeight
();
IList <float> trySplitHeightPoints = new List <float>();
float delta = 35;
for (int i = 1; i <= 5 && originalElementHeight - delta * i > originalElementHeight / 2; i++)
{
trySplitHeightPoints.Add(originalElementHeight - delta * i);
}
for (int i = 0; i < trySplitHeightPoints.Count && !ableToProcessKeepWithNext; i++)
{
float curElementSplitHeight = trySplitHeightPoints[i];
RootLayoutArea firstElementSplitLayoutArea = (RootLayoutArea)currentArea.Clone();
firstElementSplitLayoutArea.GetBBox().SetHeight(curElementSplitHeight).MoveUp(currentArea.GetBBox().GetHeight
() - curElementSplitHeight);
LayoutResult firstElementSplitLayoutResult = keepWithNextHangingRenderer.SetParent(this).Layout(new LayoutContext
(firstElementSplitLayoutArea.Clone()));
if (firstElementSplitLayoutResult.GetStatus() == LayoutResult.PARTIAL)
{
RootLayoutArea storedArea = currentArea;
UpdateCurrentAndInitialArea(firstElementSplitLayoutResult);
LayoutResult firstElementOverflowLayoutResult = firstElementSplitLayoutResult.GetOverflowRenderer().Layout
(new LayoutContext(currentArea.Clone()));
if (firstElementOverflowLayoutResult.GetStatus() == LayoutResult.FULL)
{
LayoutArea secondElementLayoutArea = currentArea.Clone();
secondElementLayoutArea.GetBBox().SetHeight(secondElementLayoutArea.GetBBox().GetHeight() - firstElementOverflowLayoutResult
.GetOccupiedArea().GetBBox().GetHeight());
LayoutResult secondElementLayoutResult = renderer.SetParent(this).Layout(new LayoutContext(secondElementLayoutArea
));
if (secondElementLayoutResult.GetStatus() != LayoutResult.NOTHING)
{
ableToProcessKeepWithNext = true;
currentArea = firstElementSplitLayoutArea;
currentPageNumber = firstElementSplitLayoutArea.GetPageNumber();
ShrinkCurrentAreaAndProcessRenderer(firstElementSplitLayoutResult.GetSplitRenderer(), new List <IRenderer>(
), firstElementSplitLayoutResult);
UpdateCurrentAndInitialArea(firstElementSplitLayoutResult);
ShrinkCurrentAreaAndProcessRenderer(firstElementSplitLayoutResult.GetOverflowRenderer(), new List <IRenderer
>(), firstElementOverflowLayoutResult);
}
}
if (!ableToProcessKeepWithNext)
{
currentArea = storedArea;
currentPageNumber = storedArea.GetPageNumber();
}
}
}
}
if (!ableToProcessKeepWithNext && !currentArea.IsEmptyArea())
{
RootLayoutArea storedArea = currentArea;
UpdateCurrentAndInitialArea(null);
LayoutResult firstElementLayoutResult = keepWithNextHangingRenderer.SetParent(this).Layout(new LayoutContext
(currentArea.Clone()));
if (firstElementLayoutResult.GetStatus() == LayoutResult.FULL)
{
LayoutArea secondElementLayoutArea = currentArea.Clone();
secondElementLayoutArea.GetBBox().SetHeight(secondElementLayoutArea.GetBBox().GetHeight() - firstElementLayoutResult
.GetOccupiedArea().GetBBox().GetHeight());
LayoutResult secondElementLayoutResult = renderer.SetParent(this).Layout(new LayoutContext(secondElementLayoutArea
));
if (secondElementLayoutResult.GetStatus() != LayoutResult.NOTHING)
{
ableToProcessKeepWithNext = true;
ShrinkCurrentAreaAndProcessRenderer(keepWithNextHangingRenderer, new List <IRenderer>(), keepWithNextHangingRendererLayoutResult
);
}
}
if (!ableToProcessKeepWithNext)
{
currentArea = storedArea;
currentPageNumber = storedArea.GetPageNumber();
}
}
if (!ableToProcessKeepWithNext)
{
ILog logger = LogManager.GetLogger(typeof(RootRenderer));
logger.Warn(iText.IO.LogMessageConstant.RENDERER_WAS_NOT_ABLE_TO_PROCESS_KEEP_WITH_NEXT);
ShrinkCurrentAreaAndProcessRenderer(keepWithNextHangingRenderer, new List <IRenderer>(), keepWithNextHangingRendererLayoutResult
);
}
keepWithNextHangingRenderer = null;
keepWithNextHangingRendererLayoutResult = null;
}
}
public virtual RootRendererAreaStateHandler StorePreviousState(RootRenderer rootRenderer)
{
storedPreviousArea = rootRenderer.currentArea;
storedPreviousFloatRenderAreas = new List <Rectangle>(rootRenderer.floatRendererAreas);
return(this);
}
