/// <summary>Operations to perform before drawing an element.</summary>
/// <remarks>
/// Operations to perform before drawing an element.
/// This includes setting stroke color and width, fill color.
/// </remarks>
/// <param name="context">the svg draw context</param>
internal virtual void PreDraw(SvgDrawContext context)
{
if (this.attributesAndStyles != null)
{
PdfCanvas currentCanvas = context.GetCurrentCanvas();
PdfExtGState opacityGraphicsState = new PdfExtGState();
if (!partOfClipPath)
{
float generalOpacity = GetOpacity();
{
// fill
String fillRawValue = GetAttributeOrDefault(SvgConstants.Attributes.FILL, "black");
this.doFill = !SvgConstants.Values.NONE.EqualsIgnoreCase(fillRawValue);
if (doFill && CanElementFill())
{
float fillOpacity = GetOpacityByAttributeName(SvgConstants.Attributes.FILL_OPACITY, generalOpacity);
Color fillColor = null;
TransparentColor transparentColor = GetColorFromAttributeValue(context, fillRawValue, 0, fillOpacity);
if (transparentColor != null)
{
fillColor = transparentColor.GetColor();
fillOpacity = transparentColor.GetOpacity();
}
if (!CssUtils.CompareFloats(fillOpacity, 1f))
{
opacityGraphicsState.SetFillOpacity(fillOpacity);
}
// set default if no color has been parsed
if (fillColor == null)
{
fillColor = ColorConstants.BLACK;
}
currentCanvas.SetFillColor(fillColor);
}
}
{
// stroke
String strokeRawValue = GetAttributeOrDefault(SvgConstants.Attributes.STROKE, SvgConstants.Values.NONE);
if (!SvgConstants.Values.NONE.EqualsIgnoreCase(strokeRawValue))
{
String strokeWidthRawValue = GetAttribute(SvgConstants.Attributes.STROKE_WIDTH);
// 1 px = 0,75 pt
float strokeWidth = 0.75f;
if (strokeWidthRawValue != null)
{
strokeWidth = CssUtils.ParseAbsoluteLength(strokeWidthRawValue);
}
float strokeOpacity = GetOpacityByAttributeName(SvgConstants.Attributes.STROKE_OPACITY, generalOpacity);
Color strokeColor = null;
TransparentColor transparentColor = GetColorFromAttributeValue(context, strokeRawValue, strokeWidth / 2, strokeOpacity
);
if (transparentColor != null)
{
strokeColor = transparentColor.GetColor();
strokeOpacity = transparentColor.GetOpacity();
}
if (!CssUtils.CompareFloats(strokeOpacity, 1f))
{
opacityGraphicsState.SetStrokeOpacity(strokeOpacity);
}
// as default value for stroke is 'none' we should not set
// it in case when value obtaining fails
if (strokeColor != null)
{
currentCanvas.SetStrokeColor(strokeColor);
}
currentCanvas.SetLineWidth(strokeWidth);
doStroke = true;
}
}
{
// opacity
if (!opacityGraphicsState.GetPdfObject().IsEmpty())
{
currentCanvas.SetExtGState(opacityGraphicsState);
}
}
}
}
}
/// <summary>Applies font styles to an element.</summary>
/// <param name="cssProps">the CSS props</param>
/// <param name="context">the processor context</param>
/// <param name="stylesContainer">the styles container</param>
/// <param name="element">the element</param>
public static void ApplyFontStyles(IDictionary <String, String> cssProps, ProcessorContext context, IStylesContainer
stylesContainer, IPropertyContainer element)
{
float em = CssDimensionParsingUtils.ParseAbsoluteLength(cssProps.Get(CssConstants.FONT_SIZE));
float rem = context.GetCssContext().GetRootFontSize();
if (em != 0)
{
element.SetProperty(Property.FONT_SIZE, UnitValue.CreatePointValue(em));
}
if (cssProps.Get(CssConstants.FONT_FAMILY) != null)
{
// TODO DEVSIX-2534
IList <String> fontFamilies = FontFamilySplitter.SplitFontFamily(cssProps.Get(CssConstants.FONT_FAMILY));
element.SetProperty(Property.FONT, fontFamilies.ToArray(new String[fontFamilies.Count]));
}
if (cssProps.Get(CssConstants.FONT_WEIGHT) != null)
{
element.SetProperty(Property.FONT_WEIGHT, cssProps.Get(CssConstants.FONT_WEIGHT));
}
if (cssProps.Get(CssConstants.FONT_STYLE) != null)
{
element.SetProperty(Property.FONT_STYLE, cssProps.Get(CssConstants.FONT_STYLE));
}
String cssColorPropValue = cssProps.Get(CssConstants.COLOR);
if (cssColorPropValue != null)
{
TransparentColor transparentColor;
if (!CssConstants.TRANSPARENT.Equals(cssColorPropValue))
{
float[] rgbaColor = CssDimensionParsingUtils.ParseRgbaColor(cssColorPropValue);
Color color = new DeviceRgb(rgbaColor[0], rgbaColor[1], rgbaColor[2]);
float opacity = rgbaColor[3];
transparentColor = new TransparentColor(color, opacity);
}
else
{
transparentColor = new TransparentColor(ColorConstants.BLACK, 0f);
}
element.SetProperty(Property.FONT_COLOR, transparentColor);
}
// Make sure to place that before text-align applier
String direction = cssProps.Get(CssConstants.DIRECTION);
if (CssConstants.RTL.Equals(direction))
{
element.SetProperty(Property.BASE_DIRECTION, BaseDirection.RIGHT_TO_LEFT);
element.SetProperty(Property.TEXT_ALIGNMENT, TextAlignment.RIGHT);
}
else
{
if (CssConstants.LTR.Equals(direction))
{
element.SetProperty(Property.BASE_DIRECTION, BaseDirection.LEFT_TO_RIGHT);
element.SetProperty(Property.TEXT_ALIGNMENT, TextAlignment.LEFT);
}
}
if (stylesContainer is IElementNode && ((IElementNode)stylesContainer).ParentNode() is IElementNode && CssConstants
.RTL.Equals(((IElementNode)((IElementNode)stylesContainer).ParentNode()).GetStyles().Get(CssConstants.
DIRECTION)) && !element.HasProperty(Property.HORIZONTAL_ALIGNMENT))
{
// We should only apply horizontal alignment if parent has dir attribute or direction property
element.SetProperty(Property.HORIZONTAL_ALIGNMENT, HorizontalAlignment.RIGHT);
}
// Make sure to place that after direction applier
String align = cssProps.Get(CssConstants.TEXT_ALIGN);
if (CssConstants.LEFT.Equals(align))
{
element.SetProperty(Property.TEXT_ALIGNMENT, TextAlignment.LEFT);
}
else
{
if (CssConstants.RIGHT.Equals(align))
{
element.SetProperty(Property.TEXT_ALIGNMENT, TextAlignment.RIGHT);
}
else
{
if (CssConstants.CENTER.Equals(align))
{
element.SetProperty(Property.TEXT_ALIGNMENT, TextAlignment.CENTER);
}
else
{
if (CssConstants.JUSTIFY.Equals(align))
{
element.SetProperty(Property.TEXT_ALIGNMENT, TextAlignment.JUSTIFIED);
element.SetProperty(Property.SPACING_RATIO, 1f);
}
}
}
}
String whiteSpace = cssProps.Get(CssConstants.WHITE_SPACE);
bool textWrappingDisabled = CssConstants.NOWRAP.Equals(whiteSpace) || CssConstants.PRE.Equals(whiteSpace);
element.SetProperty(Property.NO_SOFT_WRAP_INLINE, textWrappingDisabled);
if (!textWrappingDisabled)
{
String overflowWrap = cssProps.Get(CssConstants.OVERFLOW_WRAP);
if (CssConstants.ANYWHERE.Equals(overflowWrap))
{
element.SetProperty(Property.OVERFLOW_WRAP, OverflowWrapPropertyValue.ANYWHERE);
}
else
{
if (CssConstants.BREAK_WORD.Equals(overflowWrap))
{
element.SetProperty(Property.OVERFLOW_WRAP, OverflowWrapPropertyValue.BREAK_WORD);
}
else
{
element.SetProperty(Property.OVERFLOW_WRAP, OverflowWrapPropertyValue.NORMAL);
}
}
String wordBreak = cssProps.Get(CssConstants.WORD_BREAK);
if (CssConstants.BREAK_ALL.Equals(wordBreak))
{
element.SetProperty(Property.SPLIT_CHARACTERS, new BreakAllSplitCharacters());
}
else
{
if (CssConstants.KEEP_ALL.Equals(wordBreak))
{
element.SetProperty(Property.SPLIT_CHARACTERS, new KeepAllSplitCharacters());
}
else
{
if (CssConstants.BREAK_WORD.Equals(wordBreak))
{
// CSS specification cite that describes the reason for overflow-wrap overriding:
// "For compatibility with legacy content, the word-break property also supports
// a deprecated break-word keyword. When specified, this has the same effect
// as word-break: normal and overflow-wrap: anywhere, regardless of the actual value
// of the overflow-wrap property."
element.SetProperty(Property.OVERFLOW_WRAP, OverflowWrapPropertyValue.BREAK_WORD);
element.SetProperty(Property.SPLIT_CHARACTERS, new DefaultSplitCharacters());
}
else
{
element.SetProperty(Property.SPLIT_CHARACTERS, new DefaultSplitCharacters());
}
}
}
}
float[] colors = new float[4];
Color textDecorationColor;
float opacity_1 = 1f;
String textDecorationColorProp = cssProps.Get(CssConstants.TEXT_DECORATION_COLOR);
if (textDecorationColorProp == null || CssConstants.CURRENTCOLOR.Equals(textDecorationColorProp))
{
if (element.GetProperty <TransparentColor>(Property.FONT_COLOR) != null)
{
TransparentColor transparentColor = element.GetProperty <TransparentColor>(Property.FONT_COLOR);
textDecorationColor = transparentColor.GetColor();
opacity_1 = transparentColor.GetOpacity();
}
else
{
textDecorationColor = ColorConstants.BLACK;
}
}
else
{
if (textDecorationColorProp.StartsWith("hsl"))
{
logger.Error(iText.Html2pdf.LogMessageConstant.HSL_COLOR_NOT_SUPPORTED);
textDecorationColor = ColorConstants.BLACK;
}
else
{
colors = CssDimensionParsingUtils.ParseRgbaColor(textDecorationColorProp);
textDecorationColor = new DeviceRgb(colors[0], colors[1], colors[2]);
opacity_1 = colors[3];
}
}
String textDecorationLineProp = cssProps.Get(CssConstants.TEXT_DECORATION_LINE);
if (textDecorationLineProp != null)
{
String[] textDecorationLines = iText.IO.Util.StringUtil.Split(textDecorationLineProp, "\\s+");
IList <Underline> underlineList = new List <Underline>();
foreach (String textDecorationLine in textDecorationLines)
{
if (CssConstants.BLINK.Equals(textDecorationLine))
{
logger.Error(iText.Html2pdf.LogMessageConstant.TEXT_DECORATION_BLINK_NOT_SUPPORTED);
}
else
{
if (CssConstants.LINE_THROUGH.Equals(textDecorationLine))
{
underlineList.Add(new Underline(textDecorationColor, opacity_1, .75f, 0, 0, 1 / 4f, PdfCanvasConstants.LineCapStyle
.BUTT));
}
else
{
if (CssConstants.OVERLINE.Equals(textDecorationLine))
{
underlineList.Add(new Underline(textDecorationColor, opacity_1, .75f, 0, 0, 9 / 10f, PdfCanvasConstants.LineCapStyle
.BUTT));
}
else
{
if (CssConstants.UNDERLINE.Equals(textDecorationLine))
{
underlineList.Add(new Underline(textDecorationColor, opacity_1, .75f, 0, 0, -1 / 10f, PdfCanvasConstants.LineCapStyle
.BUTT));
}
else
{
if (CssConstants.NONE.Equals(textDecorationLine))
{
underlineList = null;
// if none and any other decoration are used together, none is displayed
break;
}
}
}
}
}
}
element.SetProperty(Property.UNDERLINE, underlineList);
}
String textIndent = cssProps.Get(CssConstants.TEXT_INDENT);
if (textIndent != null)
{
UnitValue textIndentValue = CssDimensionParsingUtils.ParseLengthValueToPt(textIndent, em, rem);
if (textIndentValue != null)
{
if (textIndentValue.IsPointValue())
{
element.SetProperty(Property.FIRST_LINE_INDENT, textIndentValue.GetValue());
}
else
{
logger.Error(MessageFormatUtil.Format(iText.Html2pdf.LogMessageConstant.CSS_PROPERTY_IN_PERCENTS_NOT_SUPPORTED
, CssConstants.TEXT_INDENT));
}
}
}
String letterSpacing = cssProps.Get(CssConstants.LETTER_SPACING);
if (letterSpacing != null && !CssConstants.NORMAL.Equals(letterSpacing))
{
UnitValue letterSpacingValue = CssDimensionParsingUtils.ParseLengthValueToPt(letterSpacing, em, rem);
if (letterSpacingValue.IsPointValue())
{
element.SetProperty(Property.CHARACTER_SPACING, letterSpacingValue.GetValue());
}
}
// browsers ignore values in percents
String wordSpacing = cssProps.Get(CssConstants.WORD_SPACING);
if (wordSpacing != null)
{
UnitValue wordSpacingValue = CssDimensionParsingUtils.ParseLengthValueToPt(wordSpacing, em, rem);
if (wordSpacingValue != null)
{
if (wordSpacingValue.IsPointValue())
{
element.SetProperty(Property.WORD_SPACING, wordSpacingValue.GetValue());
}
}
}
// browsers ignore values in percents
String lineHeight = cssProps.Get(CssConstants.LINE_HEIGHT);
SetLineHeight(element, lineHeight, em, rem);
SetLineHeightByLeading(element, lineHeight, em, rem);
}
/// <summary>
/// Gets the opacity of the
/// <see cref="Border">border</see>
/// </summary>
/// <returns>the border opacity; a float between 0 and 1, where 1 stands for fully opaque color and 0 - for fully transparent
/// </returns>
public virtual float GetOpacity()
{
return(transparentColor.GetOpacity());
}
){kind=link}