private static void ParseText(HtmlNode htmlNode, ref List <Elements.BaseElement> elements, double fontSizeMultiplier, FontStyle fontStyle, FontWeight fontWeight, TextDecorationCollection textDecorations, Brush foreground)
{
string decodedText = DecodeText(htmlNode.InnerText);
decodedText = decodedText.Trim();
if (String.IsNullOrEmpty(decodedText) && elements.Count > 0 && elements[elements.Count - 1] is Elements.Break) // we don't add empty space after break
{
return;
}
// create text
Elements.BaseElement element = new Elements.Text()
{
FontSizeMultiplier = fontSizeMultiplier,
FontStyle = fontStyle.ToTextFontStyle(),
FontWeight = fontWeight.ToTextFontWeight(),
Decoration = textDecorations.ToTextDecoration(),
Foreground = foreground,
Value = decodedText
};
// extract id
ExtractId(htmlNode, ref element);
// extract anchor
if (htmlNode.Name == "a")
{
ExtractHref(htmlNode, ref element);
}
// add
elements.Add(element);
}
private Run CreateRun(Elements.Text textElement, string text)
{
Run run = new Run();
run.FontSize = _ePubViewer.FontSize * textElement.FontSizeMultiplier;
run.FontStyle = textElement.FontStyle.ToFontStyle();
run.FontWeight = textElement.FontWeight.ToFontWeight();
if (textElement.Foreground != null)
{
// force Foreground - for links
run.Foreground = textElement.Foreground;
}
run.TextDecorations = textElement.Decoration.ToTextDecorationCollection();
run.Text = text;
return(run);
}
private void RenderText(ItemElementsContainer iec, int currentLocation, ref Page page, ref double top, Elements.BaseElement element)
{
Elements.Text textElement = (Elements.Text)element;
string value = " " + textElement.Value;
TextBlock tb = ExtractTextBlock(ref page, top);
double prevTextBlockActualHeight = tb.ActualHeight;
tb.Inlines.Add(CreateRun(textElement, value));
double textBlockActualHeight = tb.ActualHeight - prevTextBlockActualHeight;
// check if fits (in most cases it will pass, because of short paragraphs)
if (top + textBlockActualHeight > page.Content.Height)
{
// remove inline
tb.Inlines.RemoveAt(tb.Inlines.Count - 1);
int idx = 1;
string[] parts = value.Split(' ');
while (true)
{
string text = StringJoin(' ', parts, idx);
prevTextBlockActualHeight = tb.ActualHeight;
tb.Inlines.Add(CreateRun(textElement, text));
textBlockActualHeight = tb.ActualHeight - prevTextBlockActualHeight;
if (top + textBlockActualHeight > page.Content.Height)
{
// remove inline
tb.Inlines.RemoveAt(tb.Inlines.Count - 1);
// push prev text
// it could be empty if nothing fits
string prevText = null;
if (idx > 1)
{
prevText = StringJoin(' ', parts, idx - 1);
tb.Inlines.Add(CreateRun(textElement, prevText));
}
PushPage(iec, ref page, currentLocation, ref top);
// render rest of text
if (idx > 1)
{
textElement.Value = value.Substring(prevText.Length);
}
else
{
textElement.Value = value;
}
RenderText(iec, currentLocation, ref page, ref top, element);
break;
}
else
{
// remove inline
tb.Inlines.RemoveAt(tb.Inlines.Count - 1);
}
idx++;
}
}
else
{
// create anchor rect if href isn't null
if (!String.IsNullOrEmpty(textElement.Href))
{
AnchorRect anchorRect = new AnchorRect();
anchorRect.Href = textElement.Href;
anchorRect.Rect = new Rect(
_ePubViewer.ContentMargin.Left,
(textBlockActualHeight == 0) ? top - _ePubViewer.LineHeight : top,
_ePubViewer.ContentSize.Width,
(textBlockActualHeight == 0) ? _ePubViewer.LineHeight : textBlockActualHeight);
page.AnchorRects.Add(anchorRect);
}
top += textBlockActualHeight;
}
}
