//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
/// <summary>
/// Constructor.
/// </summary>
/// <param name="host">
/// TextFormatter host
/// </param>
/// <param name="cpPara">
/// Character position of paragraph
/// </param>
/// <param name="durTrack">
/// Track width
/// </param>
/// <param name="paraClient">
/// Owner of the line
/// </param>
/// <param name="runCache">
/// Text run cache
/// </param>
internal OptimalTextSource(TextFormatterHost host, int cpPara, int durTrack, TextParaClient paraClient, TextRunCache runCache) : base(paraClient)
{
_host = host;
_durTrack = durTrack;
_runCache = runCache;
_cpPara = cpPara;
}
/// <summary>
/// Client to ask for the possible smallest and largest paragraph width that can fully contain the passing text content
/// </summary>
/// <param name="textSource">an object representing text layout clients text source for TextFormatter.</param>
/// <param name="firstCharIndex">character index to specify where in the source text the line starts</param>
/// <param name="paragraphProperties">properties that can change from one paragraph to the next, such as text flow direction, text alignment, or indentation.</param>
/// <param name="textRunCache">an object representing content cache of the client.</param>
/// <returns>min max paragraph width</returns>
public override MinMaxParagraphWidth FormatMinMaxParagraphWidth(
TextSource textSource,
int firstCharIndex,
TextParagraphProperties paragraphProperties,
TextRunCache textRunCache
)
{
throw new NotImplementedException("Managed.TextFormatting.TextFormatter.FormatMinMaxParagraphWidth");
}
/// <summary>
/// Format and produce a text line either with or without previously known
/// line break point.
/// </summary>
private TextLine FormatLineInternal(
TextSource textSource,
int firstCharIndex,
int lineLength,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
EventTrace.EasyTraceEvent(EventTrace.Keyword.KeywordText, EventTrace.Level.Verbose, EventTrace.Event.WClientStringBegin, "TextFormatterImp.FormatLineInternal Start");
// prepare formatting settings
FormatSettings settings = PrepareFormatSettings(
textSource,
firstCharIndex,
paragraphWidth,
paragraphProperties,
previousLineBreak,
textRunCache,
(lineLength != 0), // Do optimal break if break is given
true, // isSingleLineFormatting
_textFormattingMode
);
TextLine textLine = null;
if (!settings.Pap.AlwaysCollapsible &&
previousLineBreak == null &&
lineLength <= 0
)
{
// simple text line.
textLine = SimpleTextLine.Create(
settings,
firstCharIndex,
RealToIdealFloor(paragraphWidth),
textSource.PixelsPerDip
) as TextLine;
}
if (textLine == null)
{
// content is complex, creating complex line
textLine = new TextMetrics.FullTextLine(
settings,
firstCharIndex,
lineLength,
RealToIdealFloor(paragraphWidth),
LineFlags.None
) as TextLine;
}
EventTrace.EasyTraceEvent(EventTrace.Keyword.KeywordText, EventTrace.Level.Verbose, EventTrace.Event.WClientStringEnd, "TextFormatterImp.FormatLineInternal End");
return(textLine);
}
internal override TextParagraphCache CreateParagraphCache(
#endif
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
throw new NotImplementedException("Managed.TextFormatting.TextFormatter.CreateParagraphCache");
}
/// <summary>
/// Client to format a text line that fills a paragraph in the document.
/// </summary>
/// <param name="textSource">an object representing text layout clients text source for TextFormatter.</param>
/// <param name="firstCharIndex">character index to specify where in the source text the line starts</param>
/// <param name="paragraphWidth">width of paragraph in which the line fills</param>
/// <param name="paragraphProperties">properties that can change from one paragraph to the next, such as text flow direction, text alignment, or indentation.</param>
/// <param name="previousLineBreak">LineBreak property of the previous text line, or null if this is the first line in the paragraph</param>
/// <param name="textRunCache">an object representing content cache of the client.</param>
/// <returns>object representing a line of text that client interacts with. </returns>
public override TextLine FormatLine(
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
return(FormatLineInternal(
textSource,
firstCharIndex,
0,
paragraphWidth,
paragraphProperties,
previousLineBreak,
textRunCache));
}
internal override TextLine RecreateLine(
#endif
TextSource textSource,
int firstCharIndex,
int lineLength,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
return(FormatLineInternal(
textSource,
firstCharIndex,
lineLength,
paragraphWidth,
paragraphProperties,
previousLineBreak,
textRunCache
));
}
internal override TextParagraphCache CreateParagraphCache(
#endif
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache
)
{
// prepare formatting settings
FormatSettings settings = PrepareFormatSettings(
textSource,
firstCharIndex,
paragraphWidth,
paragraphProperties,
previousLineBreak,
textRunCache,
true, // optimalBreak
false, // !isSingleLineFormatting
_textFormattingMode
);
//
// Optimal paragraph formatting session specific check
//
if (!settings.Pap.Wrap && settings.Pap.OptimalBreak)
{
// Optimal paragraph must wrap.
throw new ArgumentException(SR.Get(SRID.OptimalParagraphMustWrap));
}
// create paragraph content cache object
return(new TextParagraphCache(
settings,
firstCharIndex,
RealToIdeal(paragraphWidth)
));
}
/// <summary>
/// Validate all the relevant text formatting initial settings and package them
/// </summary>
private FormatSettings PrepareFormatSettings(
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextLineBreak previousLineBreak,
TextRunCache textRunCache,
bool useOptimalBreak,
bool isSingleLineFormatting,
TextFormattingMode textFormattingMode
)
{
VerifyTextFormattingArguments(
textSource,
firstCharIndex,
paragraphWidth,
paragraphProperties,
textRunCache
);
if (textRunCache.Imp == null)
{
// No run cache object available, create one
textRunCache.Imp = new TextRunCacheImp();
}
// initialize formatting settings
return(new FormatSettings(
this,
textSource,
textRunCache.Imp,
new ParaProp(this, paragraphProperties, useOptimalBreak),
previousLineBreak,
isSingleLineFormatting,
textFormattingMode,
false
));
}
/// <summary>
/// Client to ask for the possible smallest and largest paragraph width that can fully contain the passing text content
/// </summary>
/// <param name="textSource">an object representing text layout clients text source for TextFormatter.</param>
/// <param name="firstCharIndex">character index to specify where in the source text the line starts</param>
/// <param name="paragraphProperties">properties that can change from one paragraph to the next, such as text flow direction, text alignment, or indentation.</param>
/// <param name="textRunCache">an object representing content cache of the client.</param>
/// <returns>min max paragraph width</returns>
public override MinMaxParagraphWidth FormatMinMaxParagraphWidth(
TextSource textSource,
int firstCharIndex,
TextParagraphProperties paragraphProperties,
TextRunCache textRunCache
)
{
// prepare formatting settings
FormatSettings settings = PrepareFormatSettings(
textSource,
firstCharIndex,
0, // infinite paragraphWidth
paragraphProperties,
null, // always format the whole paragraph - no previousLineBreak
textRunCache,
false, // optimalBreak
true, // isSingleLineFormatting
_textFormattingMode
);
// create specialized line specifically for min/max calculation
TextMetrics.FullTextLine line = new TextMetrics.FullTextLine(
settings,
firstCharIndex,
0, // lineLength
0, // paragraph width has no significant meaning in min/max calculation
(LineFlags.KeepState | LineFlags.MinMax)
);
// line width in this case is the width of a line when the entire paragraph is laid out
// as a single long line.
MinMaxParagraphWidth minMax = new MinMaxParagraphWidth(line.MinWidth, line.Width);
line.Dispose();
return(minMax);
}
// ------------------------------------------------------------------
// Create and format text line.
//
// lineStartIndex - index of the first character in the line
// width - wrapping width of the line
// lineProperties - properties of the line
// textRunCache - run cache used by text formatter
// showParagraphEllipsis - true if paragraph ellipsis is shown
// at the end of the line
// ------------------------------------------------------------------
internal void Format(int dcp, double width, TextParagraphProperties lineProperties, TextLineBreak textLineBreak, TextRunCache textRunCache, bool showParagraphEllipsis)
{
#if TEXTPANELLAYOUTDEBUG
TextPanelDebug.IncrementCounter("Line.Format", TextPanelDebug.Category.TextView);
#endif
_mirror = (lineProperties.FlowDirection == FlowDirection.RightToLeft);
_dcp = dcp;
_showParagraphEllipsis = showParagraphEllipsis;
_wrappingWidth = width;
_line = _owner.TextFormatter.FormatLine(this, dcp, width, lineProperties, textLineBreak, textRunCache);
}
//-------------------------------------------------------------------
//
// Internal Methods
//
//-------------------------------------------------------------------
#region Internal Methods
/// <summary>
/// Create and format text line.
/// </summary>
/// <param name="dcp">First character position for the line.</param>
/// <param name="formatWidth">Width to pass to LS formatter.</param>
/// <param name="paragraphWidth">Line wrapping width.</param>
/// <param name="lineProperties">Line's properties.</param>
/// <param name="textRunCache">Run cache.</param>
/// <param name="formatter">Text formatter.</param>
/// <remarks>
/// formatWidth/paragraphWidth is an attempt to work around bug 114719.
/// Unfortunately, Line Services cannot guarantee that once a line
/// has been measured, measuring the same content with the actual line
/// width will produce the same line.
///
/// For example, suppose we format dcp 0 with paragraphWidth = 100.
/// Suppose this results in a line from dcp 0 - 10, with width = 95.
///
/// We would expect that a call to FormatLine with dcp = 0,
/// paragraphWidth = 95 would result in the same 10 char line.
/// But in practice it might return a 9 char line.
///
/// The workaround is to pass in an explicit formatting width across
/// multiple calls, even if the paragraphWidth changes.
/// </remarks>
internal void Format(int dcp, double formatWidth, double paragraphWidth, LineProperties lineProperties, TextRunCache textRunCache, TextFormatter formatter)
{
_lineProperties = lineProperties;
_dcp = dcp;
_paragraphWidth = paragraphWidth;
// We must ignore TextAlignment here since formatWidth does not
// necessarilly equal paragraphWidth. We'll adjust on later calls.
lineProperties.IgnoreTextAlignment = (lineProperties.TextAlignment != TextAlignment.Justify);
try
{
_line = formatter.FormatLine(this, dcp, formatWidth, lineProperties, null, textRunCache);
}
finally
{
lineProperties.IgnoreTextAlignment = false;
}
}
/// <summary>
/// Verify all text formatting arguments
/// </summary>
private void VerifyTextFormattingArguments(
TextSource textSource,
int firstCharIndex,
double paragraphWidth,
TextParagraphProperties paragraphProperties,
TextRunCache textRunCache
)
{
if (textSource == null)
{
throw new ArgumentNullException("textSource");
}
if (textRunCache == null)
{
throw new ArgumentNullException("textRunCache");
}
if (paragraphProperties == null)
{
throw new ArgumentNullException("paragraphProperties");
}
if (paragraphProperties.DefaultTextRunProperties == null)
{
throw new ArgumentNullException("paragraphProperties.DefaultTextRunProperties");
}
if (paragraphProperties.DefaultTextRunProperties.Typeface == null)
{
throw new ArgumentNullException("paragraphProperties.DefaultTextRunProperties.Typeface");
}
if (DoubleUtil.IsNaN(paragraphWidth))
{
throw new ArgumentOutOfRangeException("paragraphWidth", SR.Get(SRID.ParameterValueCannotBeNaN));
}
if (double.IsInfinity(paragraphWidth))
{
throw new ArgumentOutOfRangeException("paragraphWidth", SR.Get(SRID.ParameterValueCannotBeInfinity));
}
if (paragraphWidth < 0 ||
paragraphWidth > Constants.RealInfiniteWidth)
{
throw new ArgumentOutOfRangeException("paragraphWidth", SR.Get(SRID.ParameterMustBeBetween, 0, Constants.RealInfiniteWidth));
}
double realMaxFontRenderingEmSize = Constants.RealInfiniteWidth / Constants.GreatestMutiplierOfEm;
if (paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize < 0 ||
paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize > realMaxFontRenderingEmSize)
{
throw new ArgumentOutOfRangeException("paragraphProperties.DefaultTextRunProperties.FontRenderingEmSize", SR.Get(SRID.ParameterMustBeBetween, 0, realMaxFontRenderingEmSize));
}
if (paragraphProperties.Indent > Constants.RealInfiniteWidth)
{
throw new ArgumentOutOfRangeException("paragraphProperties.Indent", SR.Get(SRID.ParameterCannotBeGreaterThan, Constants.RealInfiniteWidth));
}
if (paragraphProperties.LineHeight > Constants.RealInfiniteWidth)
{
throw new ArgumentOutOfRangeException("paragraphProperties.LineHeight", SR.Get(SRID.ParameterCannotBeGreaterThan, Constants.RealInfiniteWidth));
}
if (paragraphProperties.DefaultIncrementalTab < 0 ||
paragraphProperties.DefaultIncrementalTab > Constants.RealInfiniteWidth)
{
throw new ArgumentOutOfRangeException("paragraphProperties.DefaultIncrementalTab", SR.Get(SRID.ParameterMustBeBetween, 0, Constants.RealInfiniteWidth));
}
}
// Token: 0x0600662D RID: 26157 RVA: 0x001CB874 File Offset: 0x001C9A74
internal void Format(int dcp, double width, TextParagraphProperties lineProperties, TextLineBreak textLineBreak, TextRunCache textRunCache, bool showParagraphEllipsis)
{
this._mirror = (lineProperties.FlowDirection == FlowDirection.RightToLeft);
this._dcp = dcp;
this._showParagraphEllipsis = showParagraphEllipsis;
this._wrappingWidth = width;
this._line = this._owner.TextFormatter.FormatLine(this, dcp, width, lineProperties, textLineBreak, textRunCache);
}
// Token: 0x06008AAB RID: 35499 RVA: 0x00257686 File Offset: 0x00255886
internal FormattingContext(bool measureMode, bool clearOnLeft, bool clearOnRight, TextRunCache textRunCache)
{
this.MeasureMode = measureMode;
this.ClearOnLeft = clearOnLeft;
this.ClearOnRight = clearOnRight;
this.TextRunCache = textRunCache;
this.LineFormatLengthTarget = -1;
}
// Token: 0x06004134 RID: 16692 RVA: 0x0012A210 File Offset: 0x00128410
internal void Format(int dcp, double formatWidth, double paragraphWidth, LineProperties lineProperties, TextRunCache textRunCache, TextFormatter formatter)
{
this._lineProperties = lineProperties;
this._dcp = dcp;
this._paragraphWidth = paragraphWidth;
lineProperties.IgnoreTextAlignment = (lineProperties.TextAlignment != TextAlignment.Justify);
try
{
this._line = formatter.FormatLine(this, dcp, formatWidth, lineProperties, null, textRunCache);
}
finally
{
lineProperties.IgnoreTextAlignment = false;
}
}
