private GalleryItem GetBlock(TLMessage message, TLWebPage webPage, TLPageBlockBase pageBlock)
{
if (pageBlock is TLPageBlockPhoto photoBlock)
{
var photo = TLWebPage.GetPhotoWithId(webPage, photoBlock.PhotoId) as TLPhoto;
if (photo == null)
{
return(null);
}
return(new GalleryPhotoItem(photo, message.From));
}
else if (pageBlock is TLPageBlockVideo videoBlock)
{
var document = TLWebPage.GetDocumentWithId(webPage, videoBlock.VideoId) as TLDocument;
if (document == null)
{
return(null);
}
return(new GalleryDocumentItem(document, message.From));
}
return(null);
}
private static int CountBlock(TLWebPage webPage, TLPageBlockBase pageBlock, int count)
{
if (pageBlock is TLPageBlockPhoto photoBlock)
{
var photo = GetPhotoWithId(webPage, photoBlock.PhotoId) as TLPhoto;
if (photo == null)
{
return(count);
}
return(count + 1);
}
else if (pageBlock is TLPageBlockVideo videoBlock)
{
var document = GetDocumentWithId(webPage, videoBlock.VideoId) as TLDocument;
if (document == null)
{
return(count);
}
return(count + 1);
}
return(count);
}
public override TLObject FromBytes(byte[] bytes, ref int position)
{
bytes.ThrowExceptionIfIncorrect(ref position, Signature);
Cover = GetObject <TLPageBlockBase>(bytes, ref position);
return(this);
}
private double PaddingForBlock(TLPageBlockBase block)
{
if (block is TLPageBlockCover || block is TLPageBlockPreformatted ||
block is TLPageBlockPhoto || block is TLPageBlockVideo ||
block is TLPageBlockSlideshow || block is TLPageBlockChannel)
{
return(0.0);
}
return(_padding);
}
private FrameworkElement ProcessEmbedPost(TLPageBase page, TLPageBlockEmbedPost block, IList <TLPhotoBase> photos, IList <TLDocumentBase> documents)
{
var element = new StackPanel {
Style = Resources["BlockEmbedPostStyle"] as Style
};
var header = new Grid();
header.RowDefinitions.Add(new RowDefinition {
Height = new GridLength(1, GridUnitType.Auto)
});
header.RowDefinitions.Add(new RowDefinition {
Height = new GridLength(1, GridUnitType.Auto)
});
header.ColumnDefinitions.Add(new ColumnDefinition {
Width = new GridLength(1, GridUnitType.Auto)
});
header.ColumnDefinitions.Add(new ColumnDefinition());
header.Margin = new Thickness(_padding, 0, 0, _padding);
var photo = photos.FirstOrDefault(x => x.Id == block.AuthorPhotoId);
var ellipse = new Ellipse();
ellipse.Width = 36;
ellipse.Height = 36;
ellipse.Margin = new Thickness(0, 0, _padding, 0);
ellipse.Fill = new ImageBrush {
ImageSource = (ImageSource)DefaultPhotoConverter.Convert(photo, true), Stretch = Stretch.UniformToFill, AlignmentX = AlignmentX.Center, AlignmentY = AlignmentY.Center
};
Grid.SetRowSpan(ellipse, 2);
var textAuthor = new TextBlock();
textAuthor.Text = block.Author;
textAuthor.VerticalAlignment = VerticalAlignment.Bottom;
Grid.SetColumn(textAuthor, 1);
Grid.SetRow(textAuthor, 0);
var textDate = new TextBlock();
textDate.Text = BindConvert.Current.DateTime(block.Date).ToString("dd MMMM yyyy");
textDate.VerticalAlignment = VerticalAlignment.Top;
textDate.Style = (Style)Resources["CaptionTextBlockStyle"];
textDate.Foreground = (SolidColorBrush)Resources["SystemControlDisabledChromeDisabledLowBrush"];
Grid.SetColumn(textDate, 1);
Grid.SetRow(textDate, 1);
header.Children.Add(ellipse);
header.Children.Add(textAuthor);
header.Children.Add(textDate);
element.Children.Add(header);
TLPageBlockBase previousBlock = null;
FrameworkElement previousElement = null;
foreach (var subBlock in block.Blocks)
{
var subLayout = ProcessBlock(page, subBlock, photos, documents);
var spacing = SpacingBetweenBlocks(previousBlock, block);
if (subLayout != null)
{
subLayout.Margin = new Thickness(_padding, spacing, _padding, 0);
element.Children.Add(subLayout);
}
previousBlock = block;
previousElement = subLayout;
}
return(element);
}
protected override async void OnNavigatedTo(NavigationEventArgs e)
{
ScrollingHost.Items.Clear();
ViewModel.Gallery.Items.Clear();
ViewModel.Gallery.TotalItems = 0;
ViewModel.Gallery.SelectedItem = null;
_anchors.Clear();
var parameter = TLSerializationService.Current.Deserialize((string)e.Parameter);
var webpageMedia = parameter as TLMessageMediaWebPage;
if (webpageMedia != null)
{
parameter = webpageMedia.WebPage as TLWebPage;
}
var webpage = parameter as TLWebPage;
if (webpage != null && webpage.HasCachedPage)
{
var url = webpage.Url;
if (url.StartsWith("http") == false)
{
url = "http://" + url;
}
if (Uri.TryCreate(url, UriKind.Absolute, out Uri uri))
{
ViewModel.ShareLink = uri;
ViewModel.ShareTitle = webpage.HasTitle ? webpage.Title : webpage.Url;
}
_webpageId = webpage.Id;
var photos = new List <TLPhotoBase>(webpage.CachedPage.Photos);
var documents = new List <TLDocumentBase>(webpage.CachedPage.Videos);
if (webpage.HasPhoto)
{
photos.Insert(0, webpage.Photo);
}
var processed = 0;
TLPageBlockBase previousBlock = null;
FrameworkElement previousElement = null;
foreach (var block in webpage.CachedPage.Blocks)
{
var element = ProcessBlock(webpage.CachedPage, block, photos, documents);
var spacing = SpacingBetweenBlocks(previousBlock, block);
var padding = PaddingForBlock(block);
if (element != null)
{
element.Margin = new Thickness(padding, spacing, padding, 0);
ScrollingHost.Items.Add(element);
}
previousBlock = block;
previousElement = element;
processed++;
}
var part = webpage.CachedPage as TLPagePart;
if (part != null)
{
var response = await MTProtoService.Current.GetWebPageAsync(webpage.Url, webpage.Hash);
if (response.IsSucceeded)
{
var newpage = response.Result as TLWebPage;
if (newpage != null && newpage.HasCachedPage)
{
photos = new List <TLPhotoBase>(newpage.CachedPage.Photos);
documents = new List <TLDocumentBase>(newpage.CachedPage.Videos);
if (webpage.HasPhoto)
{
photos.Insert(0, webpage.Photo);
}
for (int i = processed; i < newpage.CachedPage.Blocks.Count; i++)
{
var block = newpage.CachedPage.Blocks[i];
var element = ProcessBlock(newpage.CachedPage, block, photos, documents);
var spacing = SpacingBetweenBlocks(previousBlock, block);
var padding = PaddingForBlock(block);
if (element != null)
{
element.Margin = new Thickness(padding, spacing, padding, 0);
ScrollingHost.Items.Add(element);
}
previousBlock = newpage.CachedPage.Blocks[i];
previousElement = element;
}
}
}
}
}
base.OnNavigatedTo(e);
}
private FrameworkElement ProcessText(TLPageBase page, TLPageBlockBase block, IList <TLPhotoBase> photos, IList <TLDocumentBase> documents, bool caption)
{
TLRichTextBase text = null;
switch (block)
{
case TLPageBlockTitle title:
text = title.Text;
break;
case TLPageBlockSubtitle subtitle:
text = subtitle.Text;
break;
case TLPageBlockHeader header:
text = header.Text;
break;
case TLPageBlockSubheader subheader:
text = subheader.Text;
break;
case TLPageBlockFooter footer:
text = footer.Text;
break;
case TLPageBlockParagraph paragraph:
text = paragraph.Text;
break;
case TLPageBlockPreformatted preformatted:
text = preformatted.Text;
break;
case TLPageBlockPhoto photo:
text = photo.Caption;
break;
case TLPageBlockVideo video:
text = video.Caption;
break;
case TLPageBlockSlideshow slideshow:
text = slideshow.Caption;
break;
case TLPageBlockEmbed embed:
text = embed.Caption;
break;
case TLPageBlockEmbedPost embedPost:
text = embedPost.Caption;
break;
case TLPageBlockBlockquote blockquote:
text = caption ? blockquote.Caption : blockquote.Text;
break;
case TLPageBlockPullquote pullquote:
text = caption ? pullquote.Caption : pullquote.Text;
break;
}
if (text != null && text.TypeId != TLType.TextEmpty)
{
var textBlock = new RichTextBlock();
var span = new Span();
var paragraph = new Paragraph();
paragraph.Inlines.Add(span);
textBlock.Blocks.Add(paragraph);
textBlock.TextWrapping = TextWrapping.Wrap;
//textBlock.Margin = new Thickness(12, 0, 12, 12);
ProcessRichText(text, span);
switch (block.TypeId)
{
case TLType.PageBlockTitle:
textBlock.FontSize = 28;
textBlock.FontFamily = new FontFamily("Times New Roman");
//textBlock.TextLineBounds = TextLineBounds.TrimToBaseline;
break;
case TLType.PageBlockSubtitle:
textBlock.FontSize = 17;
//textBlock.FontFamily = new FontFamily("Times New Roman");
//textBlock.TextLineBounds = TextLineBounds.TrimToBaseline;
break;
case TLType.PageBlockHeader:
textBlock.FontSize = 24;
textBlock.FontFamily = new FontFamily("Times New Roman");
//textBlock.TextLineBounds = TextLineBounds.TrimToBaseline;
break;
case TLType.PageBlockSubheader:
textBlock.FontSize = 19;
textBlock.FontFamily = new FontFamily("Times New Roman");
//textBlock.TextLineBounds = TextLineBounds.TrimToBaseline;
break;
case TLType.PageBlockParagraph:
textBlock.FontSize = 17;
break;
case TLType.PageBlockPreformatted:
textBlock.FontSize = 16;
break;
case TLType.PageBlockFooter:
textBlock.FontSize = 15;
textBlock.Foreground = (SolidColorBrush)Resources["SystemControlDisabledChromeDisabledLowBrush"];
//textBlock.TextAlignment = TextAlignment.Center;
break;
case TLType.PageBlockPhoto:
case TLType.PageBlockVideo:
textBlock.FontSize = 15;
textBlock.Foreground = (SolidColorBrush)Resources["SystemControlDisabledChromeDisabledLowBrush"];
textBlock.TextAlignment = TextAlignment.Center;
break;
case TLType.PageBlockSlideshow:
case TLType.PageBlockEmbed:
case TLType.PageBlockEmbedPost:
textBlock.FontSize = 15;
textBlock.Foreground = (SolidColorBrush)Resources["SystemControlDisabledChromeDisabledLowBrush"];
//textBlock.TextAlignment = TextAlignment.Center;
break;
case TLType.PageBlockBlockquote:
textBlock.FontSize = caption ? 15 : 17;
if (caption)
{
textBlock.Foreground = (SolidColorBrush)Resources["SystemControlDisabledChromeDisabledLowBrush"];
textBlock.TextAlignment = TextAlignment.Center;
}
break;
case TLType.PageBlockPullquote:
var pullquoteBlock = block as TLPageBlockPullquote;
textBlock.FontSize = caption ? 15 : 17;
if (caption)
{
textBlock.Foreground = (SolidColorBrush)Resources["SystemControlDisabledChromeDisabledLowBrush"];
}
else
{
textBlock.FontFamily = new FontFamily("Times New Roman");
//textBlock.TextLineBounds = TextLineBounds.TrimToBaseline;
textBlock.TextAlignment = TextAlignment.Center;
}
break;
}
return(textBlock);
}
return(null);
}
private FrameworkElement ProcessBlock(TLPageBase page, TLPageBlockBase block, IList <TLPhotoBase> photos, IList <TLDocumentBase> documents)
{
switch (block)
{
case TLPageBlockCover cover:
return(ProcessCover(page, cover, photos, documents));
case TLPageBlockAuthorDate authorDate:
return(ProcessAuthorDate(page, authorDate, photos, documents));
case TLPageBlockHeader header:
case TLPageBlockSubheader subheader:
case TLPageBlockTitle title:
case TLPageBlockSubtitle subtitle:
case TLPageBlockFooter footer:
case TLPageBlockParagraph paragraph:
return(ProcessText(page, block, photos, documents, false));
case TLPageBlockBlockquote blockquote:
return(ProcessBlockquote(page, blockquote, photos, documents));
case TLPageBlockDivider divider:
return(ProcessDivider(page, divider, photos, documents));
case TLPageBlockPhoto photo:
return(ProcessPhoto(page, photo, photos, documents));
case TLPageBlockList list:
return(ProcessList(page, list, photos, documents));
case TLPageBlockVideo video:
return(ProcessVideo(page, video, photos, documents));
case TLPageBlockEmbedPost embedPost:
return(ProcessEmbedPost(page, embedPost, photos, documents));
case TLPageBlockSlideshow slideshow:
return(ProcessSlideshow(page, slideshow, photos, documents));
case TLPageBlockCollage collage:
return(ProcessCollage(page, collage, photos, documents));
case TLPageBlockEmbed embed:
return(ProcessEmbed(page, embed, photos, documents));
case TLPageBlockPullquote pullquote:
return(ProcessPullquote(page, pullquote, photos, documents));
case TLPageBlockAnchor anchor:
return(ProcessAnchor(page, anchor, photos, documents));
case TLPageBlockPreformatted preformatted:
return(ProcessPreformatted(page, preformatted, photos, documents));
case TLPageBlockChannel channel:
return(ProcessChannel(page, channel, photos, documents));
case TLPageBlockUnsupported unsupported:
Debug.WriteLine("Unsupported block type: " + block.GetType());
break;
}
return(null);
}
private double SpacingBetweenBlocks(TLPageBlockBase upper, TLPageBlockBase lower)
{
if (lower is TLPageBlockCover || lower is TLPageBlockChannel)
{
return(0);
}
return(12);
if (lower is TLPageBlockCover || lower is TLPageBlockChannel)
{
return(0);
}
else if (lower is TLPageBlockDivider || upper is TLPageBlockDivider)
{
return(15); // 25;
}
else if (lower is TLPageBlockBlockquote || upper is TLPageBlockBlockquote || lower is TLPageBlockPullquote || upper is TLPageBlockPullquote)
{
return(17); // 27;
}
else if (lower is TLPageBlockTitle)
{
return(12); // 20;
}
else if (lower is TLPageBlockAuthorDate)
{
if (upper is TLPageBlockTitle)
{
return(16); // 26;
}
else
{
return(12); // 20;
}
}
else if (lower is TLPageBlockParagraph)
{
if (upper is TLPageBlockTitle || upper is TLPageBlockAuthorDate)
{
return(20); // 34;
}
else if (upper is TLPageBlockHeader || upper is TLPageBlockSubheader)
{
return(15); // 25;
}
else if (upper is TLPageBlockParagraph)
{
return(15); // 25;
}
else if (upper is TLPageBlockList)
{
return(19); // 31;
}
else if (upper is TLPageBlockPreformatted)
{
return(11); // 19;
}
else
{
return(12); // 20;
}
}
else if (lower is TLPageBlockList)
{
if (upper is TLPageBlockTitle || upper is TLPageBlockAuthorDate)
{
return(20); // 34;
}
else if (upper is TLPageBlockHeader || upper is TLPageBlockSubheader)
{
return(19); // 31;
}
else if (upper is TLPageBlockParagraph || upper is TLPageBlockList)
{
return(19); // 31;
}
else if (upper is TLPageBlockPreformatted)
{
return(11); // 19;
}
else
{
return(12); // 20;
}
}
else if (lower is TLPageBlockPreformatted)
{
if (upper is TLPageBlockParagraph)
{
return(11); // 19;
}
else
{
return(12); // 20;
}
}
else if (lower is TLPageBlockHeader)
{
return(20); // 32;
}
else if (lower is TLPageBlockSubheader)
{
return(20); // 32;
}
else if (lower == null)
{
if (upper is TLPageBlockFooter)
{
return(14); // 24;
}
else
{
return(14); // 24;
}
}
return(12); // 20;
}
public override TLObject FromStream(Stream input)
{
Cover = GetObject <TLPageBlockBase>(input);
return(this);
}
