//
// overflow operations
//
protected virtual void DoMoveToNextRegion(PDFUnit lineheight)
{
PDFLayoutLine lastline = this.CurrentLine;
this.EndText(); //Always end this block of text
bool newPage;
PDFLayoutRegion region = lastline.Region;
PDFLayoutBlock block = (PDFLayoutBlock)region.Parent;
LayoutEngineBase engine = this.Parent as LayoutEngineBase;
if (null == engine)
{
throw new NullReferenceException("Parent engine was not the expected BlockLayoutEngine. A Hack that is needed for overflowing textual content");
}
else if (engine.MoveToNextRegion(lineheight, ref region, ref block, out newPage))
{
if (!this.StartText())
{
return;
}
}
else
{
if (this.Context.TraceLog.ShouldLog(TraceLevel.Message))
{
this.Context.TraceLog.Add(TraceLevel.Message, LOG_CATEGORY, "Cannot layout any more text for component '" + this.TextComponent.ID + "'. Available space full and cannot move to another region.");
}
this.ContinueLayout = false;
}
}
/// <summary>
/// Moves the entire list block to a new region or page in the layout
/// </summary>
/// <param name="requiredHeight"></param>
/// <returns></returns>
protected virtual bool MoveFullListToNextRegion(PDFUnit requiredHeight)
{
if (_didmovefulllist)
{
this.Context.TraceLog.Add(TraceLevel.Error, ListEngineLogCategory, "Already moved list to the next region so cannot move list '" + this.List.ID + "' to the next region");
return(false);
}
PDFLayoutBlock block = this._listBlock;
PDFLayoutRegion region = this._listBlock.CurrentRegion;
bool newPage;
if (this.MoveToNextRegion(requiredHeight, ref region, ref block, out newPage))
{
if (this.Context.ShouldLogVerbose)
{
this.Context.TraceLog.Add(TraceLevel.Verbose, ListEngineLogCategory, "Moved entire list '" + this.List.ID + "' to the next " + (newPage ? "Page" : "Region") + " and list block is now '" + block.ToString() + "'");
}
//If we have a new block then we set the old one as invisible
if (block != _listBlock)
{
_listBlock.Position.Visibility = Visibility.None;
}
_listBlock = block;
_didmovefulllist = true;
return(true);
}
else
{
return(false);
}
}
public virtual PDFLayoutPositionedRegionRun AddPositionedRun(PDFLayoutRegion postioned, IPDFComponent component)
{
PDFLayoutPositionedRegionRun run = new PDFLayoutPositionedRegionRun(postioned, this, component);
this.Runs.Add(run);
return(run);
}
//
// overflow methods
//
#region protected virtual bool StartListInAnotherRegion(PDFUnit itemHeight, PDFLayoutBlock item, int itemindex)
/// <summary>
/// Closes down the current list and attempts to open a new region to start laying out any further items.
/// Returns true if a new region was created, otherwise false.
/// </summary>
/// <param name="itemHeight"></param>
/// <param name="item"></param>
/// <param name="itemindex"></param>
/// <returns></returns>
protected virtual bool StartListInAnotherRegion(PDFUnit itemHeight, PDFLayoutBlock item, int itemindex)
{
PDFLayoutRegion itemRegion = item.CurrentRegion;
PDFLayoutBlock origListBlock = item.Parent as PDFLayoutBlock;
PDFLayoutRegion origListRegion = origListBlock.CurrentRegion;
if (origListBlock.IsClosed == false)
{
origListBlock.Close();
}
//(origListBlock.Parent as PDFLayoutBlock).CurrentRegion.AddToSize(origListBlock);
bool newPage;
bool started = this.MoveToNextRegion(itemHeight, ref itemRegion, ref item, out newPage);
if (started)
{
if (this.Context.ShouldLogVerbose)
{
this.Context.TraceLog.Add(TraceLevel.Verbose, ListEngineLogCategory, "Started list '" + this.List.ID + "' in a new " + (newPage ? "Page" : "Region") + " and list item block is now '" + item.ToString() + "'");
}
}
return(started);
}
public PDFLayoutXObject(PDFLayoutLine parent, PDFLayoutRegion childContainer, PDFPositionOptions position, IPDFComponent owner)
: base(parent, owner as IPDFComponent)
{
this._childContainer = childContainer;
this._resources = new PDFResourceList(this, false);
this.SubType = "Form";
this.Matrix = PDFTransformationMatrix.Identity();
this._position = position;
}
//
// ctor(s)
//
#region public PDFLayoutLine(PDFLayoutRegion region, PDFUnit fullwidth)
/// <summary>
/// Creates a new line in the specified region.
/// </summary>
/// <param name="region">The region that contains this line</param>
/// <param name="fullwidth">The full available horizontal space for this line </param>
public PDFLayoutLine(PDFLayoutRegion region, PDFUnit fullwidth, HorizontalAlignment halign, VerticalAlignment valign, int lineindex)
: base(region, null)
{
this.FullWidth = fullwidth;
this.HAlignment = halign;
this.VAlignment = valign;
this.LineIndex = lineindex;
this.BaseLineOffset = 0;
}
protected virtual void AddReturn(PDFUnit widthOfLastTextDraw, bool hardReturn)
{
this.AssertCurrentLine();
PDFLayoutLine line = this.CurrentLine;
PDFTextRunNewLine br = new PDFTextRunNewLine(false, line, this.TextRenderOptions, this.TextComponent);
line.AddRun(br);
//The offset is from the start of the last text drawing operation
//and the offset of the start of the current line
PDFUnit lineright = widthOfLastTextDraw;
PDFUnit back = line.Width - lineright;
//Previous - 27 Feb 2015
//br.Offset = new PDFSize(back, line.Height);
//Updated
if (line.BaseLineOffset == 0 || this.TextRenderOptions.Leading.HasValue) //we don't have any begins or ends affecting the flow (or an explicit leading)
{
br.Offset = new PDFSize(back, line.Height);
}
else
{
br.Offset = new PDFSize(back, (line.Height - line.BaseLineOffset) + this.TextRenderOptions.GetAscent());
}
PDFLayoutRegion reg = line.Region;
reg.CloseCurrentItem();
line = reg.BeginNewLine();
this.BeginningRun.Lines.Add(line);
PDFUnit inset;
if (hardReturn)
{
inset = this.TextRenderOptions.GetFirstLineInset();
}
else
{
inset = PDFUnit.Zero;
}
PDFTextRunSpacer spacer = this.AddLineInsetRun(inset, 0, line);
br.NextLineSpacer = spacer;
this.CurrentLine = line;
this.CurrentLineInset = inset;
}
private PDFLayoutInlineEnd CreateAndAddInlineEnd(PDFPositionOptions pos, PDFLayoutInlineBegin begin)
{
PDFLayoutBlock containerBlock = this.DocumentLayout.CurrentPage.LastOpenBlock();
PDFLayoutRegion containerRegion = containerBlock.CurrentRegion;
if (containerRegion.HasOpenItem == false)
{
containerRegion.BeginNewLine();
}
PDFLayoutLine currline = containerRegion.CurrentItem as PDFLayoutLine;
PDFLayoutInlineEnd end = currline.AddInlineRunEnd(this, this.Component, begin, pos);
return(end);
}
private PDFLayoutInlineBegin CreateAndAddInlineBegin(PDFPositionOptions pos)
{
PDFLayoutBlock containerBlock = this.DocumentLayout.CurrentPage.LastOpenBlock();
PDFLayoutRegion containerRegion = containerBlock.CurrentRegion;
if (containerRegion.HasOpenItem == false)
{
containerRegion.BeginNewLine();
}
PDFLayoutLine currline = containerRegion.CurrentItem as PDFLayoutLine;
PDFLayoutInlineBegin begin = currline.AddInlineRunStart(this, this.Component, pos, this.FullStyle);
return(begin);
}
private PDFLayoutXObject CreateAndAddInput(PDFPositionOptions pos)
{
PDFLayoutBlock containerBlock = this.DocumentLayout.CurrentPage.LastOpenBlock();
PDFLayoutRegion containerRegion = containerBlock.CurrentRegion;
if (containerRegion.HasOpenItem == false)
{
containerRegion.BeginNewLine();
}
//pos.Y = 200;
PDFLayoutRegion container = containerBlock.BeginNewPositionedRegion(pos, this.DocumentLayout.CurrentPage, this.Component, this.FullStyle, false);
this.Line = containerRegion.CurrentItem as PDFLayoutLine;
PDFLayoutXObject begin = this.Line.AddXObjectRun(this, this.Field, container, pos, this.FullStyle);
return(begin);
}
protected virtual PDFLayoutXObject ApplyViewPort(PDFPositionOptions oldpos, PDFRect viewPort)
{
//Set the size to the viewport size
var newpos = oldpos.Clone();
newpos.X = viewPort.X;
newpos.Y = viewPort.Y;
//update to new widths
newpos.Width = viewPort.Width;
newpos.Height = viewPort.Height;
//Set the style values to the viewport too. (and reset the cache)
this.FullStyle.Size.Width = newpos.Width.Value;
this.FullStyle.Size.Height = newpos.Height.Value;
if (this.FullStyle is Scryber.Styles.StyleFull)
{
(this.FullStyle as StyleFull).ClearFullRefs();
}
PDFLayoutBlock containerBlock = this.DocumentLayout.CurrentPage.LastOpenBlock();
PDFLayoutRegion containerRegion = containerBlock.CurrentRegion;
if (containerRegion.HasOpenItem == false)
{
containerRegion.BeginNewLine();
}
//pos.Y = 200;
PDFLayoutRegion container = containerBlock.BeginNewPositionedRegion(newpos, this.DocumentLayout.CurrentPage, this.Component, this.FullStyle, false);
this.Line = containerRegion.CurrentItem as PDFLayoutLine;
PDFLayoutXObject begin = this.Line.AddXObjectRun(this, this.Component, container, newpos, this.FullStyle);
begin.SetOutputSize(oldpos.Width, oldpos.Height);
//this.CurrentBlock.IsFormXObject = true;
//this.CurrentBlock.XObjectViewPort = pos.ViewPort.Value;
return(begin);
}
protected virtual PDFLayoutBlock CreateContinerBlock(PDFPositionOptions position)
{
bool newPage = false;
PDFLayoutBlock containerBlock = this.DocumentLayout.CurrentPage.LastOpenBlock();
PDFLayoutRegion containerRegion = containerBlock.CurrentRegion;
if (containerRegion.HasOpenItem)
{
containerRegion.CloseCurrentItem();
}
PDFUnit required = PDFUnit.Zero;
if (position.Height.HasValue)
{
required = position.Height.Value;
}
//ADDED for min/max sizes.
else if (position.MinimumHeight.HasValue)
{
required = position.MinimumHeight.Value;
}
//Do we have space
if (containerRegion.AvailableHeight <= 0 || (containerRegion.AvailableHeight < required))
{
if (this.MoveToNextRegion(required, ref containerRegion, ref containerBlock, out newPage) == false)
{
this.Context.TraceLog.Add(TraceLevel.Warning, LOG_CATEGORY, "Cannot fit the block for component " + this.Component.UniqueID + " in the avilable height (required = '" + position.Height + "', available = '" + containerRegion.AvailableHeight + "'), and we cannot overflow to a new region. Layout of component stopped and returning.");
this.ContinueLayout = false;
return(null);
}
}
CurrentBlock = containerBlock.BeginNewContainerBlock(this.Component, this, this.FullStyle, position.PositionMode);
CurrentBlock.BlockRepeatIndex = 0;
return(containerBlock);
}
/// <summary>
/// If there is no open line at the start, or after a hard return, then this created a new one (adding inset as required)
/// </summary>
/// <returns></returns>
private PDFLayoutLine EnsureFirstLineAvailable(out bool startedLine)
{
startedLine = false;
PDFLayoutPage pg = this.Context.DocumentLayout.CurrentPage;
PDFLayoutBlock block = pg.LastOpenBlock();
if (null == block || block.IsClosed)
{
this.Context.TraceLog.Add(TraceLevel.Error, LOG_CATEGORY, "There is no open block on page '" + pg.ToString() + "' to add content to.");
return(null);
throw new InvalidOperationException("There is no open block to add the textual content to.");
}
PDFLayoutRegion reg = block.CurrentRegion;
if (null == reg || reg.IsClosed)
{
this.Context.TraceLog.Add(TraceLevel.Error, LOG_CATEGORY, "There is no open region in block '" + block.ToString() + "' on page '" + pg.ToString() + "' to add content to.");
return(null);
throw new InvalidOperationException("There is no open block to add the textual content to.");
}
PDFLayoutLine line;
if (reg.HasOpenItem)
{
line = (PDFLayoutLine)reg.CurrentItem;
}
else
{
line = reg.BeginNewLine();
startedLine = true;
//No Inset spacer as this will be handled by the begin run
}
return(line);
}
/// <summary>
/// Add characters to the line(s), and returns the last width of the characters that were laid out.
/// </summary>
protected virtual PDFUnit AddProxyCharacters(PDFTextProxyOp proxy)
{
this.AssertCurrentLine();
PDFUnit lineheight = this.TextRenderOptions.GetLineHeight();
ZeroLineCounter zeros = new ZeroLineCounter();
PDFSize measured = PDFSize.Empty;
PDFSize required = PDFSize.Empty;
PDFLayoutLine line = this.CurrentLine;
PDFLayoutRegion reg = line.Region;
PDFUnit availH = reg.AvailableHeight;
PDFUnit availW = line.AvailableWidth;
if (availH < lineheight)
{
if (this.Position.OverflowAction != OverflowAction.Clip)
{
availH = lineheight;
}
else
{
this.DoMoveToNextRegion(lineheight);
if (!this.ContinueLayout)
{
return(PDFUnit.Zero);
}
}
}
//Measure the string an get the fitted characters
int fitted;
this.Context.PerformanceMonitor.Begin(PerformanceMonitorType.Text_Measure);
measured = this.MeasureString(availH, availW, proxy.Text, 0, out fitted);
this.Context.PerformanceMonitor.End(PerformanceMonitorType.Text_Measure);
required = new PDFSize(measured.Width, lineheight);
if (fitted < proxy.Text.Length) //cannot split a proxy - must simply be a single run.
{
//try on the next line to see if we can put everything on there.
this.AddSoftReturn(0);
if (!zeros.AssertIncrement(this.Context))
{
return(PDFUnit.Zero);
}
availW = this.CurrentLine.AvailableWidth;
this.Context.PerformanceMonitor.Begin(PerformanceMonitorType.Text_Measure);
measured = this.MeasureString(availH, availW, proxy.Text, 0, out fitted);
this.Context.PerformanceMonitor.End(PerformanceMonitorType.Text_Measure);
if (fitted < proxy.Text.Length) //Still cannot fit the proxy so not much we can do. Log it and return
{
this.Context.TraceLog.Add(TraceLevel.Warning, LOG_CATEGORY, "The text proxy for '" + proxy.Text + "' could not fit the characters on a single line. Overflow of proxies is not currently supported.");
return(measured.Width);
}
required = new PDFSize(measured.Width, lineheight);
}
// everything fitted on the line
zeros.Reset();
this.AddProxyToCurrentLine(required, proxy);
return(required.Width);
}
/// <summary>
/// Lays out a single list item based on the entry, and the list position options
/// </summary>
/// <param name="index"></param>
/// <param name="entry"></param>
/// <param name="listPosOpts"></param>
/// <returns></returns>
private PDFUnit LayoutAnItem(int index, ListNumberEntry entry, PDFPositionOptions listPosOpts)
{
//restore the items applied style onto the stack
this.StyleStack.Push(entry.AppliedStyle);
Style full = entry.FullStyle;
PDFUnit numberWidth = entry.NumberWidth;
PDFArtefactRegistrationSet artefacts = entry.ListItem.RegisterLayoutArtefacts(this.Context, full);
PDFPositionOptions itemopts = full.CreatePostionOptions();
PDFUnit pageHeight = this.Context.DocumentLayout.CurrentPage.Height;
PDFUnit h = pageHeight;
PDFUnit w = _listBlock.AvailableBounds.Width;
PDFUnit y = _itemoffset;
PDFUnit alley = DefaultListItemAlley;
if (itemopts.HasAlleyWidth)
{
alley = itemopts.AlleyWidth;
}
else if (listPosOpts.HasAlleyWidth)
{
alley = listPosOpts.AlleyWidth;
}
if (itemopts.Height.HasValue)
{
h = itemopts.Height.Value;
}
else if (itemopts.Margins.IsEmpty == false)
{
h -= itemopts.Margins.Top + itemopts.Margins.Bottom;
}
h -= itemopts.Padding.Top + itemopts.Padding.Bottom;
if (itemopts.Width.HasValue)
{
w = itemopts.Width.Value;
}
else if (itemopts.Margins.IsEmpty == false)
{
w -= itemopts.Margins.Left + itemopts.Margins.Right;
}
w -= itemopts.Padding.Left + itemopts.Padding.Right;
PDFRect totalBounds = new PDFRect(PDFUnit.Zero, y, w, h);
this._itemblock = _listBlock.BeginNewContainerBlock(entry.ListItem, this, full, itemopts.PositionMode);
PDFColumnOptions colOpts = new PDFColumnOptions()
{
AlleyWidth = alley, AutoFlow = false, ColumnCount = 2
};
this._itemblock.InitRegions(totalBounds, itemopts, colOpts, this.Context);
//Alter the widths of the regions to allow for only the number width
PDFRect region1bounds = this._itemblock.Columns[0].TotalBounds;
PDFUnit difference = region1bounds.Width - numberWidth;
region1bounds.Width = numberWidth;
this._itemblock.Columns[0].TotalBounds = region1bounds;
this._itemblock.Columns[0].HAlignment = entry.NumberAlignment;
PDFRect region2Bounds = this._itemblock.Columns[1].TotalBounds;
if (region2Bounds.X > 0)
{
region2Bounds.X -= difference;
}
region2Bounds.Width += difference;
this._itemblock.Columns[1].TotalBounds = region2Bounds;
PDFUnit numberHeight = this.LayoutItemNumber(entry, full);
this._itemblock.CurrentRegion.Close();
bool success = this._itemblock.MoveToNextRegion(true, PDFUnit.Zero, this.Context); //Pass Zero as we are not interested in overflowing yet
PDFUnit contentHeight = this.LayoutItemContent(entry);
//check that we can fit - addind the margins and padding back in.
PDFUnit itemHeight = PDFUnit.Max(numberHeight, contentHeight);
if (itemopts.Height.HasValue)
{
itemHeight = itemopts.Height.Value;
}
else if (itemopts.Margins.IsEmpty == false)
{
itemHeight += itemopts.Margins.Top + itemopts.Margins.Bottom;
}
itemHeight += itemopts.Padding.Top + itemopts.Padding.Bottom;
if (itemHeight > this._listBlock.AvailableBounds.Height - _itemoffset)
{
PDFLayoutBlock origparent = this.CurrentBlock;
PDFLayoutRegion origregion = this.CurrentBlock.CurrentRegion;
PDFLayoutBlock origlist = this._listBlock;
PDFLayoutBlock origItem = this._itemblock;
if (this._listBlock.Position.OverflowSplit == OverflowSplit.Never)
{
if (this.MoveFullListToNextRegion(_itemoffset + itemHeight))
{
//_itemoffset += itemHeight;
//PDFRect avail = _listBlock.AvailableBounds;
//avail.Height = avail.Height - _itemoffset;
}
else
{
this.Context.TraceLog.Add(TraceLevel.Warning, LOG_CATEGORY, "List '" + this.List.UniqueID + "' has filled the available space, and cannot overflow onto a new region. Layout has stopped at item index " + index);
this.ContinueLayout = false;
return(0);
}
}
else if (this.StartListInAnotherRegion(itemHeight, origItem, index))
{
//origregion.AddToSize(origlist);
_itemoffset = 0;
origItem.Offset(0, 0);
}
else
{
(origItem.Parent as PDFLayoutBlock).CurrentRegion.RemoveItem(origItem);
this.Context.TraceLog.Add(TraceLevel.Warning, LOG_CATEGORY, "List '" + this.List.UniqueID + "' has filled the available space, and cannot overflow onto a new region. Layout has stopped at item index " + index);
this.ContinueLayout = false;
}
}
else if (this._itemblock.CurrentRegion.IsClosed)
{
this._itemblock = this.CurrentBlock.LastOpenBlock();
this._listBlock = this._itemblock.Parent as PDFLayoutBlock;
}
if (null != this._itemblock)
{
if (this._itemblock.CurrentRegion.IsClosed == false)
{
this._itemblock.CurrentRegion.Close();
}
if (this._itemblock.IsClosed == false)
{
this._itemblock.Close();
this._listBlock.CurrentRegion.AddToSize(this._itemblock);
}
}
if (this.ContinueLayout)
{
RegisterChildLayout(entry.ListItem);
}
if (null != artefacts)
{
entry.ListItem.CloseLayoutArtefacts(this.Context, artefacts, full);
}
this.StyleStack.Pop();
return(itemHeight);
}
/// <summary>
/// Checks the overflow style and if new pages are supported closes the current page layout and
/// creates a new page layout (becomming the current page) and returns true.
/// If overflow is not supported - returns false
/// </summary>
/// <param name="region">If there is a change in current page, this is set to the new region</param>
/// <param name="block">If there is a change in current page, this is set to the new block</param>
/// <returns></returns>
public override bool MoveToNextPage(IPDFComponent initiator, Style initiatorStyle, Stack <PDFLayoutBlock> depth, ref PDFLayoutRegion region, ref PDFLayoutBlock block)
{
StyleValue <OverflowAction> action;
if (this.FullStyle.TryGetValue(StyleKeys.OverflowActionKey, out action) && action.Value == OverflowAction.NewPage)
{
PDFLayoutPage lastpage = this.DocumentLayout.CurrentPage;
PDFLayoutBlock open = lastpage.ContentBlock;
if (open.IsClosed)
{
open = null;
}
else
{
open = open.LastOpenBlock();
}
List <PDFLayoutBlock> toclose = new List <PDFLayoutBlock>(depth);
for (int i = toclose.Count - 1; i >= 0; i--)
{
open = toclose[i];
if (open.CurrentRegion != null && open.CurrentRegion.IsClosed == false)
{
PDFLayoutRegion openRegion = open.CurrentRegion;
openRegion.Close();
}
PDFLayoutBlock parent = open.Parent as PDFLayoutBlock;
if (null != parent)
{
PDFLayoutRegion parentRegion = parent.CurrentRegion;
if (null != parentRegion)
{
open.Close();
parentRegion.AddToSize(open);
}
}
//open = parent;
}
lastpage.Close();
var pgSize = this.GetNextPageSize(initiator, initiatorStyle, lastpage.Size);
PDFLayoutPage page = BuildContinuationPage(lastpage, pgSize);
block = page.CurrentBlock;
region = block.CurrentRegion;
if (this.Context.ShouldLogVerbose)
{
this.Context.TraceLog.Add(TraceLevel.Verbose, LOG_CATEGORY, "Built a new continuation page for " + this.Component + " and recreated the " + toclose.Count + " blocks and regions on the new page");
}
return(true);
}
else
{
if (this.Context.ShouldLogVerbose)
{
this.Context.TraceLog.Add(TraceLevel.Verbose, LOG_CATEGORY, "Cannot overflow content for page " + this.Component + " halting the continued layout by returning false");
}
return(false); //Cannot overflow
}
}
public PDFLayoutXObject AddXObjectRun(IPDFLayoutEngine engine, IPDFComponent component, PDFLayoutRegion container, PDFPositionOptions options, Style full)
{
PDFLayoutXObject xobject = new PDFLayoutXObject(this, container, options, component);
this.Runs.Add(xobject);
return(xobject);
}
public bool MoveToNextPage(IPDFComponent initiator, Style initiatorStyle, Stack <PDFLayoutBlock> depth, ref PDFLayoutRegion region, ref PDFLayoutBlock block)
{
throw new NotSupportedException("TextLayoutEngine should never be the top layout engine - and therefore should never control pages");
}
public PDFLayoutBlock CloseCurrentBlockAndStartNewInRegion(PDFLayoutBlock blockToClose, PDFLayoutRegion joinToRegion)
{
throw new NotSupportedException("CloseCurrentBlockAndStartNewInRegion should never be called on the text layout engine.");
}
public PDFLayoutPositionedRegionRun(PDFLayoutRegion region, PDFLayoutLine line, IPDFComponent owner)
: base(line, owner)
{
this.Region = region;
}
protected void EnsureContentsFit()
{
bool newPage;
PDFLayoutBlock block = this.CurrentBlock;
//re-retrieve our container block and region
//it could have changed whilst laying out other regions / pages.
PDFLayoutBlock containerBlock = block.Parent as PDFLayoutBlock;
if (block.IsClosed == false)
{
block.Close();
}
bool updateSize = false;
PDFSize updated = block.Size;
if (block.Position.MinimumHeight.HasValue && block.Height < block.Position.MinimumHeight.Value)
{
updated.Height = block.Position.MinimumHeight.Value - (block.Position.Padding.Top + block.Position.Padding.Bottom);
updateSize = true;
}
if (block.Position.MinimumWidth.HasValue && block.Width < block.Position.MinimumWidth.Value)
{
updated.Width = block.Position.MinimumWidth.Value - (block.Position.Padding.Left + block.Position.Padding.Right);
updateSize = true;
}
if (updateSize)
{
block.SetContentSize(updated.Width, updated.Height);
}
PDFLayoutRegion containerRegion = containerBlock.CurrentRegion;
//ADDED to support blocks flowing to the next region or page
PDFUnit vspace = containerRegion.TotalBounds.Height - containerRegion.UsedSize.Height;
PDFUnit req = block.Height;
bool canfitvertical = req <= vspace;
if (!canfitvertical && containerRegion.Contents.Count > 1)
{
PDFLayoutRegion prev = containerRegion;
if (this.MoveToNextRegion(req, ref containerRegion, ref containerBlock, out newPage))
{
prev.Contents.Remove(block);
containerRegion.AddExistingItem(block);
}
else
{
this.Context.TraceLog.Add(TraceLevel.Warning, LOG_CATEGORY, "Cannot fit the block for component " + this.Component.UniqueID + " in the avilable height (required = '" + req + "', available = '" + vspace + "'), and we cannot overflow to a new region. Layout of component stopped and returning.");
this.ContinueLayout = false;
}
}
else
{
//Region has not updated its size as the block was directly closed.
containerRegion.AddToSize(block);
}
}
/// <summary>
/// Overrides the base method to close the current list block, and set up a new block in the provided region.
/// Updates the references in this engine.
/// </summary>
/// <param name="blockToClose"></param>
/// <param name="joinToRegion"></param>
/// <returns></returns>
public override PDFLayoutBlock CloseCurrentBlockAndStartNewInRegion(PDFLayoutBlock blockToClose, PDFLayoutRegion joinToRegion)
{
PDFLayoutBlock orig = this.CurrentBlock;
PDFRect avail = this._listBlock.AvailableBounds;
avail.Height = joinToRegion.AvailableHeight;
PDFThickness margins = _listBlock.Position.Margins;
PDFLayoutBlock newList = base.CloseCurrentBlockAndStartNewInRegion(blockToClose, joinToRegion);
this.CurrentBlock = (PDFLayoutBlock)newList.Parent;
this._listBlock = newList;
avail.Y = 0;
avail.Width -= margins.Left + margins.Right;
avail.Height -= margins.Top + margins.Bottom;
avail.X += margins.Left;
avail.Y += margins.Top;
this._listBlock.AvailableBounds = avail;
this._itemoffset = 0;
return(newList);
}
/// <summary>
/// Add characters to the line(s), and returns the last width of the characters that were laid out.
/// </summary>
protected virtual PDFUnit AddCharacters(string chars)
{
this.AssertCurrentLine();
PDFUnit lineheight = this.TextRenderOptions.GetLineHeight();
int offset = 0;
ZeroLineCounter zeros = new ZeroLineCounter();
PDFSize measured = PDFSize.Empty;
PDFSize required = PDFSize.Empty;
while (offset < chars.Length)
{
//Check that we have enough space for the next line
PDFLayoutLine line = this.CurrentLine;
PDFLayoutRegion reg = line.Region;
PDFUnit availH = reg.AvailableHeight;
PDFUnit availW = line.AvailableWidth;
if (availH < lineheight)
{
if (this.Position.OverflowAction != OverflowAction.Clip)
{
this.DoMoveToNextRegion(lineheight);
if (!this.ContinueLayout)
{
return(PDFUnit.Zero);
}
else
{
line = this.CurrentLine;
reg = line.Region;
availW = line.AvailableWidth;
availH = reg.AvailableHeight;
}
}
else
{
availH = lineheight;
}
}
//Measure the string an get the fitted characters
Context.PerformanceMonitor.Begin(PerformanceMonitorType.Text_Measure);
int fitted;
measured = this.MeasureString(availH, availW, chars, offset, out fitted);
Context.PerformanceMonitor.End(PerformanceMonitorType.Text_Measure);
required = new PDFSize(measured.Width, lineheight);
if (fitted <= 0) //nothing fitted on the line
{
this.AddSoftReturn(0);
if (!zeros.AssertIncrement(this.Context))
{
return(PDFUnit.Zero);
}
}
else if (fitted + offset == chars.Length) // everything fitted on the line
{
zeros.Reset();
string all = chars.Substring(offset);
//if (offset == 0)
this.AddCharactersToCurrentLine(required, all);
//else
// this.AddCharactersToCurrentLine(required, chars, offset, fitted);
offset += fitted;
}
else if (IsBrokenInWord(chars, offset, fitted) && CanSplitOnWordsOnly() && !IsEmptyLine()) //don't break on words unless we have to.
{
this.AddSoftReturn(0);
if (!zeros.AssertIncrement(this.Context))
{
return(PDFUnit.Zero);
}
}
else //partial fit
{
zeros.Reset();
string partial = chars.Substring(offset, fitted);
this.AddCharactersToCurrentLine(required, partial);
//this.AddCharactersToCurrentLine(required, chars, offset, fitted);
this.AddSoftReturn(measured.Width);
offset += fitted;
//Consume any white space as we are now on a new line.
//We should never get here for NoWrap as it will alywys fit all characters one one line.
while (offset < chars.Length && char.IsWhiteSpace(chars, offset))
{
offset++;
}
}
}
return(required.Width);
}
