public static string GetBackIterators(Paragraph paragraph)
{
ParagraphIterator iter = new ParagraphIterator(paragraph.Elements);
iter = iter.GetLastLeaf();
string retString = "";
while (iter != null)
{
retString += "[" + iter.Current.GetType().Name + ":]";
if (iter.Current is Text)
retString += ((Text)iter.Current).Content;
iter = iter.GetPreviousLeaf();
}
return retString;
}
/// <summary>
/// Returns the previous iterator to a leaf in the document object tree pointing.
/// </summary>
/// <returns>The previous leaf, null if none exists.</returns>
internal ParagraphIterator GetPreviousLeaf()
{
//Move up to appropriate parent element
ParagraphIterator parIterator = GetParentIterator();
if (parIterator == null)
{
return(null);
}
int elementIndex = LastIndex;
ParagraphElements parEls = (ParagraphElements)parIterator._current;
while (elementIndex == 0)
{
elementIndex = parIterator.LastIndex;
parIterator = parIterator.GetParentIterator();
if (parIterator == null)
{
break;
}
parEls = (ParagraphElements)parIterator._current;
}
if (parIterator == null)
{
return(null);
}
int newIndex = elementIndex - 1;
if (newIndex < 0)
{
return(null);
}
List <int> indices = new List <int>(parIterator._positionIndices);//(Array_List)parIterator.positionIndices.Clone();
indices.Add(newIndex);
DocumentObject obj = GetNodeObject(parEls[newIndex]);
ParagraphIterator iterator = new ParagraphIterator(_rootNode, obj, indices);
return(iterator.SeekLastLeaf());
}
/// <summary>
/// Returns the next iterator in the tree pointing to a leaf.
/// </summary>
/// <remarks>This function is intended to receive the renderable objects of a paragraph.
/// Thus, empty ParagraphElement objects (which are collections) don't count as leafs.</remarks>
internal ParagraphIterator GetNextLeaf()
{
//Move up to appropriate parent element
ParagraphIterator parIterator = GetParentIterator();
if (parIterator == null)
{
return(null);
}
int elementIndex = this.LastIndex;
ParagraphElements parEls = (ParagraphElements)parIterator.current;
while (elementIndex == parEls.Count - 1)
{
elementIndex = parIterator.LastIndex;
parIterator = parIterator.GetParentIterator();
if (parIterator == null)
{
break;
}
parEls = (ParagraphElements)parIterator.current;
}
if (parIterator == null)
{
return(null);
}
int newIndex = elementIndex + 1;
if (newIndex >= parEls.Count)
{
return(null);
}
ArrayList indices = (ArrayList)parIterator.positionIndices.Clone();
indices.Add(newIndex);
DocumentObject obj = GetNodeObject(parEls[newIndex]);
ParagraphIterator iterator = new ParagraphIterator(this.rootNode, obj, indices);
return(iterator.SeekFirstLeaf());
}
/// <summary>
/// Initializes this instance for formatting.
/// </summary>
/// <param name="area">The area for formatting</param>
/// <param name="previousFormatInfo">A previous format info.</param>
/// <returns>False, if nothing of the paragraph will fit the area any more.</returns>
private bool InitFormat(Area area, FormatInfo previousFormatInfo)
{
this.phase = Phase.Formatting;
this.tabOffsets = new ArrayList();
ParagraphFormatInfo prevParaFormatInfo = (ParagraphFormatInfo)previousFormatInfo;
if (previousFormatInfo == null || prevParaFormatInfo.LineCount == 0)
{
((ParagraphFormatInfo)this.renderInfo.FormatInfo).isStarting = true;
ParagraphIterator parIt = new ParagraphIterator(this.paragraph.Elements);
this.currentLeaf = parIt.GetFirstLeaf();
this.isFirstLine = true;
}
else
{
this.currentLeaf = prevParaFormatInfo.GetLastLineInfo().endIter.GetNextLeaf();
this.isFirstLine = false;
((ParagraphFormatInfo)this.renderInfo.FormatInfo).isStarting = false;
}
this.startLeaf = this.currentLeaf;
this.currentVerticalInfo = CalcCurrentVerticalInfo();
this.currentYPosition = area.Y + TopBorderOffset;
this.formattingArea = area;
Rectangle rect = this.formattingArea.GetFittingRect(this.currentYPosition, this.currentVerticalInfo.height);
if (rect == null)
return false;
this.currentXPosition = rect.X + LeftIndent;
if (this.isFirstLine)
FormatListSymbol();
return true;
}
/// <summary>
/// Returns the previous iterator to a leaf in the document object tree pointing.
/// </summary>
/// <returns>The previous leaf, null if none exists.</returns>
internal ParagraphIterator GetPreviousLeaf()
{
//Move up to appropriate parent element
ParagraphIterator parIterator = GetParentIterator();
if (parIterator == null)
return null;
int elementIndex = this.LastIndex;
ParagraphElements parEls = (ParagraphElements)parIterator.current;
while (elementIndex == 0)
{
elementIndex = parIterator.LastIndex;
parIterator = parIterator.GetParentIterator();
if (parIterator == null)
break;
parEls = (ParagraphElements)parIterator.current;
}
if (parIterator == null)
return null;
int newIndex = elementIndex - 1;
if (newIndex < 0)
return null;
ArrayList indices = (ArrayList)parIterator.positionIndices.Clone();
indices.Add(newIndex);
DocumentObject obj = GetNodeObject(parEls[newIndex]);
ParagraphIterator iterator = new ParagraphIterator(this.rootNode, obj, indices);
return iterator.SeekLastLeaf();
}
/// <summary>
/// Returns the next iterator in the tree pointing to a leaf.
/// </summary>
/// <remarks>This function is intended to receive the renderable objects of a paragraph.
/// Thus, empty ParagraphElement objects (which are collections) don't count as leafs.</remarks>
internal ParagraphIterator GetNextLeaf()
{
//Move up to appropriate parent element
ParagraphIterator parIterator = GetParentIterator();
if (parIterator == null)
return null;
int elementIndex = LastIndex;
ParagraphElements parEls = (ParagraphElements)parIterator._current;
while (elementIndex == parEls.Count - 1)
{
elementIndex = parIterator.LastIndex;
parIterator = parIterator.GetParentIterator();
if (parIterator == null)
break;
parEls = (ParagraphElements)parIterator._current;
}
if (parIterator == null)
return null;
int newIndex = elementIndex + 1;
if (newIndex >= parEls.Count)
return null;
List<int> indices = new List<int>(parIterator._positionIndices); //(Array_List)parIterator.positionIndices.Clone();
indices.Add(newIndex);
DocumentObject obj = GetNodeObject(parEls[newIndex]);
ParagraphIterator iterator = new ParagraphIterator(_rootNode, obj, indices);
return iterator.SeekFirstLeaf();
}
FormatResult FormatLineBreak()
{
if (this.phase != Phase.Rendering)
this.currentLeaf = this.currentLeaf.GetNextLeaf();
this.savedWordWidth = 0;
return FormatResult.NewLine;
}
/// <summary>
/// Initializes this instance for formatting.
/// </summary>
/// <param name="area">The area for formatting</param>
/// <param name="previousFormatInfo">A previous format info.</param>
/// <returns>False, if nothing of the paragraph will fit the area any more.</returns>
private bool InitFormat(Area area, FormatInfo previousFormatInfo)
{
_phase = Phase.Formatting;
_tabOffsets = new List<TabOffset>();
ParagraphFormatInfo prevParaFormatInfo = (ParagraphFormatInfo)previousFormatInfo;
if (previousFormatInfo == null || prevParaFormatInfo.LineCount == 0)
{
((ParagraphFormatInfo)_renderInfo.FormatInfo)._isStarting = true;
ParagraphIterator parIt = new ParagraphIterator(_paragraph.Elements);
_currentLeaf = parIt.GetFirstLeaf();
_isFirstLine = true;
}
else
{
_currentLeaf = prevParaFormatInfo.GetLastLineInfo().EndIter.GetNextLeaf();
_isFirstLine = false;
((ParagraphFormatInfo)_renderInfo.FormatInfo)._isStarting = false;
}
_startLeaf = _currentLeaf;
_currentVerticalInfo = CalcCurrentVerticalInfo();
_currentYPosition = area.Y + TopBorderOffset;
_formattingArea = area;
Rectangle rect = _formattingArea.GetFittingRect(_currentYPosition, _currentVerticalInfo.Height);
if (rect == null)
return false;
_currentXPosition = rect.X + LeftIndent;
if (_isFirstLine)
FormatListSymbol();
return true;
}
void SaveBeforeProbing(out ParagraphIterator paragraphIter, out int blankCount, out XUnit wordsWidth, out XUnit xPosition, out XUnit lineWidth, out XUnit blankWidth)
{
paragraphIter = this.currentLeaf;
blankCount = this.currentBlankCount;
xPosition = this.currentXPosition;
lineWidth = this.currentLineWidth;
wordsWidth = this.currentWordsWidth;
blankWidth = this.savedBlankWidth;
}
/// <summary>
/// Renders a single line.
/// </summary>
/// <param name="lineInfo"></param>
void RenderLine(LineInfo lineInfo)
{
this.currentVerticalInfo = lineInfo.vertical;
this.currentLeaf = lineInfo.startIter;
this.startLeaf = lineInfo.startIter;
this.endLeaf = lineInfo.endIter;
this.currentBlankCount = lineInfo.blankCount;
this.currentLineWidth = lineInfo.lineWidth;
this.currentWordsWidth = lineInfo.wordsWidth;
this.currentXPosition = this.StartXPosition;
this.tabOffsets = lineInfo.tabOffsets;
this.lastTabPassed = lineInfo.lastTab == null;
this.lastTab = lineInfo.lastTab;
this.tabIdx = 0;
bool ready = this.currentLeaf == null;
if (this.isFirstLine)
RenderListSymbol();
while (!ready)
{
if (this.currentLeaf.Current == lineInfo.endIter.Current)
ready = true;
if (this.currentLeaf.Current == lineInfo.lastTab)
this.lastTabPassed = true;
RenderElement(this.currentLeaf.Current);
this.currentLeaf = this.currentLeaf.GetNextLeaf();
}
this.currentYPosition += lineInfo.vertical.height;
this.isFirstLine = false;
}
void ReMeasureLine(ref LineInfo lineInfo)
{
//--- Save ---------------------------------
ParagraphIterator iter;
int blankCount;
XUnit xPosition;
XUnit lineWidth;
XUnit wordsWidth;
XUnit blankWidth;
SaveBeforeProbing(out iter, out blankCount, out wordsWidth, out xPosition, out lineWidth, out blankWidth);
bool origLastTabPassed = this.lastTabPassed;
//------------------------------------------
this.currentLeaf = lineInfo.startIter;
this.endLeaf = lineInfo.endIter;
this.formattingArea = this.renderInfo.LayoutInfo.ContentArea;
this.tabOffsets = new ArrayList();
this.currentLineWidth = 0;
this.currentWordsWidth = 0;
Rectangle fittingRect = this.formattingArea.GetFittingRect(this.currentYPosition, this.currentVerticalInfo.height);
if (fittingRect == null)
GetType();
if (fittingRect != null)
{
this.currentXPosition = fittingRect.X + this.LeftIndent;
FormatListSymbol();
bool goOn = true;
while (goOn && this.currentLeaf != null)
{
if (this.currentLeaf.Current == lineInfo.lastTab)
this.lastTabPassed = true;
FormatElement(this.currentLeaf.Current);
goOn = this.currentLeaf != null && this.currentLeaf.Current != this.endLeaf.Current;
if (goOn)
this.currentLeaf = this.currentLeaf.GetNextLeaf();
}
lineInfo.lineWidth = this.currentLineWidth;
lineInfo.wordsWidth = this.currentWordsWidth;
lineInfo.blankCount = this.currentBlankCount;
lineInfo.tabOffsets = this.tabOffsets;
lineInfo.reMeasureLine = false;
this.lastTabPassed = origLastTabPassed;
}
RestoreAfterProbing(iter, blankCount, wordsWidth, xPosition, lineWidth, blankWidth);
}
/// <summary>
/// Probes the paragraph after a tab.
/// Caution: This Function resets the word count and line width before doing its work.
/// </summary>
/// <returns>True if the tab causes a linebreak.</returns>
bool ProbeAfterTab()
{
this.currentLineWidth = 0;
this.currentBlankCount = 0;
//Extra for auto tab after list symbol
//TODO: KLPO4KLPO: Check if this conditional statement is still required
if (this.currentLeaf != null && IsTab(this.currentLeaf.Current))
this.currentLeaf = this.currentLeaf.GetNextLeaf();
bool wordAppeared = false;
while (this.currentLeaf != null && !IsLineBreak(this.currentLeaf.Current) && !IsTab(this.currentLeaf.Current))
{
FormatResult result = FormatElement(this.currentLeaf.Current);
if (result != FormatResult.Continue)
break;
wordAppeared = wordAppeared || IsWordLikeElement(this.currentLeaf.Current);
this.currentLeaf = this.currentLeaf.GetNextLeaf();
}
return this.currentLeaf != null && !IsLineBreak(this.currentLeaf.Current) &&
!IsTab(this.currentLeaf.Current) && !wordAppeared;
}
/// <summary>
/// Probes the paragraph elements after a right aligned tab stop and returns the vertical text position to start at.
/// </summary>
/// <param name="tabStopPosition">Position of the tab to probe.</param>
/// <param name="notFitting">Out parameter determining whether the tab causes a line break.</param>
/// <returns>The new x-position to restart behind the tab.</returns>
XUnit ProbeAfterDecimalAlignedTab(XUnit tabStopPosition, out bool notFitting)
{
notFitting = false;
ParagraphIterator savedLeaf = this.currentLeaf;
//Extra for auto tab after list symbol
if (IsTab(this.currentLeaf.Current))
this.currentLeaf = this.currentLeaf.GetNextLeaf();
if (this.currentLeaf == null)
{
this.currentLeaf = savedLeaf;
return this.currentXPosition + tabStopPosition;
}
VerticalLineInfo newVerticalInfo = CalcCurrentVerticalInfo();
Rectangle fittingRect = this.formattingArea.GetFittingRect(this.currentYPosition, newVerticalInfo.height);
if (fittingRect == null)
{
notFitting = true;
this.currentLeaf = savedLeaf;
return this.currentXPosition;
}
if (IsPlainText(this.currentLeaf.Current))
{
Text text = (Text)this.currentLeaf.Current;
string word = text.Content;
int lastIndex = text.Content.LastIndexOfAny(new char[] { ',', '.' });
if (lastIndex > 0)
word = word.Substring(0, lastIndex);
XUnit wordLength = MeasureString(word);
notFitting = this.currentXPosition + wordLength >= formattingArea.X + formattingArea.Width + Tolerance;
if (!notFitting)
return this.formattingArea.X + tabStopPosition - wordLength;
else
return this.currentXPosition;
}
this.currentLeaf = savedLeaf;
return ProbeAfterRightAlignedTab(tabStopPosition, out notFitting);
}
void HandleNonFittingLine()
{
if (this.currentLeaf != null)
{
if (this.savedWordWidth > 0)
{
this.currentWordsWidth = this.savedWordWidth;
this.currentLineWidth = this.savedWordWidth;
}
this.currentLeaf = this.currentLeaf.GetNextLeaf();
this.currentYPosition += this.currentVerticalInfo.height;
this.currentVerticalInfo = new VerticalLineInfo();
}
}
FormatResult FormatSoftHyphen()
{
if (this.currentLeaf.Current == this.startLeaf.Current)
return FormatResult.Continue;
ParagraphIterator nextIter = this.currentLeaf.GetNextLeaf();
ParagraphIterator prevIter = this.currentLeaf.GetPreviousLeaf();
if (!IsWordLikeElement(prevIter.Current) || !IsWordLikeElement(nextIter.Current))
return FormatResult.Continue;
//--- Save ---------------------------------
ParagraphIterator iter;
int blankCount;
XUnit xPosition;
XUnit lineWidth;
XUnit wordsWidth;
XUnit blankWidth;
SaveBeforeProbing(out iter, out blankCount, out wordsWidth, out xPosition, out lineWidth, out blankWidth);
//------------------------------------------
this.currentLeaf = nextIter;
FormatResult result = FormatElement(nextIter.Current);
//--- Restore ------------------------------
RestoreAfterProbing(iter, blankCount, wordsWidth, xPosition, lineWidth, blankWidth);
//------------------------------------------
if (result == FormatResult.Continue)
return FormatResult.Continue;
RestoreAfterProbing(iter, blankCount, wordsWidth, xPosition, lineWidth, blankWidth);
Rectangle fittingRect = this.formattingArea.GetFittingRect(this.currentYPosition, this.currentVerticalInfo.height);
XUnit hyphenWidth = MeasureString("-");
if (xPosition + hyphenWidth <= fittingRect.X + fittingRect.Width + Tolerance
// If one word fits, but not the hyphen, the formatting must continue with the next leaf
|| prevIter.Current == this.startLeaf.Current)
{
// For Tabs in justified context
if (!IgnoreHorizontalGrowth)
{
this.currentWordsWidth += hyphenWidth;
this.currentLineWidth += hyphenWidth;
}
this.currentLeaf = nextIter;
return FormatResult.NewLine;
}
else
{
this.currentWordsWidth -= this.savedWordWidth;
this.currentLineWidth -= this.savedWordWidth;
this.currentLineWidth -= GetPreviousBlankWidth(prevIter);
this.currentLeaf = prevIter;
return FormatResult.NewLine;
}
}
XUnit GetPreviousBlankWidth(ParagraphIterator beforeIter)
{
XUnit width = 0;
ParagraphIterator savedIter = this.currentLeaf;
this.currentLeaf = beforeIter.GetPreviousLeaf();
while (this.currentLeaf != null)
{
if (this.currentLeaf.Current is BookmarkField)
this.currentLeaf = this.currentLeaf.GetPreviousLeaf();
else if (IsBlank(this.currentLeaf.Current))
{
if (!IgnoreBlank())
width = CurrentWordDistance;
break;
}
else
break;
}
this.currentLeaf = savedIter;
return width;
}
string GetOutlineTitle()
{
ParagraphIterator iter = new ParagraphIterator(this.paragraph.Elements);
iter = iter.GetFirstLeaf();
bool ignoreBlank = true;
string title = "";
while (iter != null)
{
DocumentObject current = iter.Current;
if (!ignoreBlank && (IsBlank(current) || IsTab(current) || IsLineBreak(current)))
{
title += " ";
ignoreBlank = true;
}
else if (current is Text)
{
title += ((Text)current).Content;
ignoreBlank = false;
}
else if (IsRenderedField(current))
{
title += GetFieldValue(current);
ignoreBlank = false;
}
else if (IsSymbol(current))
{
title += GetSymbol((Character)current);
ignoreBlank = false;
}
if (title.Length > 64)
break;
iter = iter.GetNextLeaf();
}
return title;
}
/// <summary>
/// Starts a new line by resetting measuring values.
/// Do not call before the first first line is formatted!
/// </summary>
/// <returns>True, if the new line may fit the formatting area.</returns>
bool StartNewLine()
{
this.tabOffsets = new ArrayList();
this.lastTab = null;
this.lastTabPosition = 0;
this.currentYPosition += this.currentVerticalInfo.height;
#if true
Rectangle rect = this.formattingArea.GetFittingRect(currentYPosition, this.currentVerticalInfo.height + BottomBorderOffset);
if (rect == null)
return false;
this.isFirstLine = false;
this.currentXPosition = StartXPosition; // depends on "currentVerticalInfo"
this.currentVerticalInfo = new VerticalLineInfo();
this.currentVerticalInfo = CalcCurrentVerticalInfo();
#else
if (this.formattingArea.GetFittingRect(currentYPosition, this.currentVerticalInfo.height + BottomBorderOffset) == null)
return false;
this.currentVerticalInfo = new VerticalLineInfo();
this.currentVerticalInfo = CalcCurrentVerticalInfo();
this.isFirstLine = false;
this.currentXPosition = this.StartXPosition;
#endif
this.startLeaf = this.currentLeaf;
this.currentBlankCount = 0;
this.currentWordsWidth = 0;
this.currentLineWidth = 0;
return true;
}
void RestoreAfterProbing(ParagraphIterator paragraphIter, int blankCount, XUnit wordsWidth, XUnit xPosition, XUnit lineWidth, XUnit blankWidth)
{
this.currentLeaf = paragraphIter;
this.currentBlankCount = blankCount;
this.currentXPosition = xPosition;
this.currentLineWidth = lineWidth;
this.currentWordsWidth = wordsWidth;
this.savedBlankWidth = blankWidth;
}
/// <summary>
/// Formats the paragraph by performing line breaks etc.
/// </summary>
/// <param name="area">The area in which to render.</param>
/// <param name="previousFormatInfo">The format info that was obtained on formatting the same paragraph on a previous area.</param>
internal override void Format(Area area, FormatInfo previousFormatInfo)
{
ParagraphFormatInfo formatInfo = ((ParagraphFormatInfo)this.renderInfo.FormatInfo);
if (!InitFormat(area, previousFormatInfo))
{
formatInfo.isStarting = false;
return;
}
formatInfo.isEnding = true;
FormatResult lastResult = FormatResult.Continue;
while (this.currentLeaf != null)
{
FormatResult result = FormatElement(this.currentLeaf.Current);
switch (result)
{
case FormatResult.Ignore:
this.currentLeaf = this.currentLeaf.GetNextLeaf();
break;
case FormatResult.Continue:
lastResult = result;
this.currentLeaf = this.currentLeaf.GetNextLeaf();
break;
case FormatResult.NewLine:
lastResult = result;
StoreLineInformation();
if (!StartNewLine())
{
result = FormatResult.NewArea;
formatInfo.isEnding = false;
}
break;
}
if (result == FormatResult.NewArea)
{
lastResult = result;
formatInfo.isEnding = false;
break;
}
}
if (formatInfo.IsEnding && lastResult != FormatResult.NewLine)
StoreLineInformation();
formatInfo.imageRenderInfos = this.imageRenderInfos;
FinishLayoutInfo();
}
