/// <summary>
/// Processes (measures) a blank.
/// </summary>
/// <returns>True if the blank causes a line break.</returns>
FormatResult FormatBlank()
{
if (IgnoreBlank())
return FormatResult.Ignore;
this.savedWordWidth = 0;
XUnit width = MeasureString(" ");
VerticalLineInfo newVertInfo = CalcCurrentVerticalInfo();
Rectangle rect = this.formattingArea.GetFittingRect(this.currentYPosition, newVertInfo.height + BottomBorderOffset);
if (rect == null)
return FormatResult.NewArea;
if (width + currentXPosition <= rect.X + rect.Width + Tolerance)
{
this.currentXPosition += width;
this.currentVerticalInfo = newVertInfo;
SaveBlankWidth(width);
return FormatResult.Continue;
}
return FormatResult.NewLine;
}
void FormatListSymbol()
{
string symbol;
XFont font;
if (GetListSymbol(out symbol, out font))
{
this.currentVerticalInfo = CalcVerticalInfo(font);
this.currentXPosition += this.gfx.MeasureString(symbol, font, StringFormat).Width;
FormatTab();
}
}
/// <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;
}
FormatResult FormatAsWord(XUnit width)
{
VerticalLineInfo newVertInfo = CalcCurrentVerticalInfo();
Rectangle rect = this.formattingArea.GetFittingRect(this.currentYPosition, newVertInfo.height + BottomBorderOffset);
if (rect == null)
return FormatResult.NewArea;
if (this.currentXPosition + width <= rect.X + rect.Width - this.RightIndent + Tolerance)
{
this.savedWordWidth = width;
this.currentXPosition += width;
// For Tabs in justified context
if (!this.IgnoreHorizontalGrowth)
this.currentWordsWidth += width;
if (this.savedBlankWidth > 0)
{
// For Tabs in justified context
if (!this.IgnoreHorizontalGrowth)
++this.currentBlankCount;
}
// For Tabs in justified context
if (!this.IgnoreHorizontalGrowth)
this.currentLineWidth += width + PopSavedBlankWidth();
this.currentVerticalInfo = newVertInfo;
this.minWidth = Math.Max(this.minWidth, width);
return FormatResult.Continue;
}
else
{
savedWordWidth = width;
return FormatResult.NewLine;
}
}
/// <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;
}
/// <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;
}
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();
}
}
/// <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()
{
_tabOffsets = new List<TabOffset>();
_lastTab = null;
_lastTabPosition = 0;
_currentYPosition += _currentVerticalInfo.Height;
Rectangle rect = _formattingArea.GetFittingRect(_currentYPosition, _currentVerticalInfo.Height + BottomBorderOffset);
if (rect == null)
return false;
_isFirstLine = false;
_currentXPosition = StartXPosition; // depends on "currentVerticalInfo"
_currentVerticalInfo = new VerticalLineInfo();
_currentVerticalInfo = CalcCurrentVerticalInfo();
_startLeaf = _currentLeaf;
_currentBlankCount = 0;
_currentWordsWidth = 0;
_currentLineWidth = 0;
return true;
}
void HandleNonFittingLine()
{
if (_currentLeaf != null)
{
if (_savedWordWidth > 0)
{
_currentWordsWidth = _savedWordWidth;
_currentLineWidth = _savedWordWidth;
}
_currentLeaf = _currentLeaf.GetNextLeaf();
_currentYPosition += _currentVerticalInfo.Height;
_currentVerticalInfo = new VerticalLineInfo();
}
}