private bool BuildAttachmentImageNodeIfNeeded(nfloat width, out IASLayoutElement layoutElement)
{
if (_viewModelRef.Target == null || !_viewModelRef.Target.HasAttachment)
{
layoutElement = null;
return(false);
}
var maxWidth = width - 50 - 73 - 17 - (nfloat)AvatarSize;
if (_attachmentImageNode.Image != null)
{
_attachmentImageNode.Style.PreferredSize = CalculateAttachmentImageNodeSize(
_attachmentImageNode.Image.Size, maxWidth);
layoutElement = _attachmentImageNode;
}
else
{
var placeholderImage = UIImage.FromBundle(StyleHelper.Style.AttachmentImagePlaceholderBundleName);
var placeholderImageNode = new ASImageNode {
Image = placeholderImage
};
placeholderImageNode.Style.PreferredSize = CalculateAttachmentImageNodeSize(placeholderImage.Size, maxWidth);
layoutElement = placeholderImageNode;
}
return(true);
}
private IASLayoutElement BuildMessageBodyWithBackground(IASLayoutElement messageBodyNode)
{
var backgroundImageBundleName = _isMyMessage
? StyleHelper.Style.BubbleMineBoundleName
: StyleHelper.Style.BubbleOtherBoundleName;
var backgroundImage = UIImage.FromBundle(backgroundImageBundleName)
?.CreateResizableImage(new UIEdgeInsets(36, 20, 10, 20));
var backgroundNode = new ASImageNode {
Image = backgroundImage
};
return(ASBackgroundLayoutSpec.BackgroundLayoutSpecWithChild(messageBodyNode, backgroundNode));
}
public static async Task LoadImageAsync(this ASImageNode imageNode, string url)
{
if (string.IsNullOrEmpty(url))
{
return;
}
var expr = ImageService.Instance.LoadUrl(url);
try
{
var image = await expr.AsUIImageAsync().ConfigureAwait(false);
imageNode.Image = image;
}
catch
{
// do nothing
}
}
public static async void LoadImageWithTextPlaceholder(this ASImageNode imageView,
string url,
string name,
AvatarStyles styles)
{
Execute.BeginOnUIThread(() =>
{
imageView.Image = CreateAvatarWithTextPlaceholder(name, styles);
});
if (string.IsNullOrEmpty(url))
{
return;
}
var expr = ImageService.Instance
.LoadUrl(url)
.DownSampleInDip(styles.Size.Width, styles.Size.Height);
UIImage image = null;
try
{
image = await expr.AsUIImageAsync().ConfigureAwait(false);
}
catch
{
// do nothing
}
if (image != null)
{
Execute.BeginOnUIThread(() =>
{
imageView.Image = image;
});
}
}