/// <summary>
/// Called before the System.Windows.UIElement.Tap event occurs.
/// </summary>
/// <param name="e">Event data for the event.</param>
protected override void OnTap(GestureEventArgs e)
{
if (State != EPubReader.State.Normal)
{
return;
}
Point p = e.GetPosition(this);
// check anchor rects
if (_currentIecIndex > DefaultCurrentLocation && Book.ItemElementsContainers[_currentIecIndex].Pages.Count > 0)
{
AnchorRect anchorRect = Book.ItemElementsContainers[_currentIecIndex].Pages[_currentPageIndex].AnchorRects.Where(ar => ar.Rect.Contains(p)).FirstOrDefault();
if (anchorRect != null)
{
if (anchorRect.Href.StartsWith("http://", StringComparison.OrdinalIgnoreCase) || anchorRect.Href.StartsWith("https://", StringComparison.OrdinalIgnoreCase))
{
try
{
new WebBrowserTask()
{
Uri = new Uri(anchorRect.Href)
}.Show();
}
catch { }
}
else if (anchorRect.Href.StartsWith("mailto:", StringComparison.OrdinalIgnoreCase))
{
try
{
new EmailComposeTask()
{
To = anchorRect.Href.Substring(7) // substring "mailto:"
}.Show();
}
catch { }
}
else
{
Navigate(anchorRect.Href);
}
e.Handled = true;
}
}
if (!e.Handled && p.X <= ActualWidth / 3 && CurrentLocation > 0)
{
// previous page
PreviousPage();
e.Handled = true;
}
else if (!e.Handled && p.X >= ActualWidth * 2 / 3 && CurrentLocation < FurthestLocation - 1)
{
// next page
NextPage();
e.Handled = true;
}
else
{
base.OnTap(e);
}
}
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;
}
}
