public Task <UIImage> LoadImageAsync(ImageSource imagesource, CancellationToken cancelationToken = default, float scale = 1)
{
UIImage image = null;
if (imagesource is IconImageSource iconsource && FontRegistry.HasFont(iconsource.Name, out var font))
{
// This will allow lookup from the Embedded Fonts
var glyph = font.GetGlyph(iconsource.Name);
var cleansedname = FontExtensions.CleanseFontName(font.Alias);
var uifont = UIFont.FromName(cleansedname ?? string.Empty, (float)iconsource.Size) ??
UIFont.SystemFontOfSize((float)iconsource.Size);
var iconcolor = iconsource.Color.IsDefault ? _defaultColor : iconsource.Color;
var attString = new NSAttributedString(glyph, font: uifont, foregroundColor: iconcolor.ToUIColor());
var imagesize = ((NSString)glyph).GetSizeUsingAttributes(attString.GetUIKitAttributes(0, out _));
UIGraphics.BeginImageContextWithOptions(imagesize, false, 0f);
var ctx = new NSStringDrawingContext();
var boundingRect = attString.GetBoundingRect(imagesize, (NSStringDrawingOptions)0, ctx);
attString.DrawString(new RectangleF(
(imagesize.Width / 2) - (boundingRect.Size.Width / 2),
(imagesize.Height / 2) - (boundingRect.Size.Height / 2),
imagesize.Width,
imagesize.Height));
image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
if (image != null && iconcolor != _defaultColor)
{
image = image.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
}
}
return(Task.FromResult(image));
}
public Task <UIImage> LoadImageAsync(
ImageSource imagesource,
CancellationToken cancelationToken = default(CancellationToken),
float scale = 1f)
{
UIImage image = null;
var fontsource = imagesource as FontImageSource;
if (fontsource != null)
{
// This will allow lookup from the Embedded Fonts
var font = Font.OfSize(fontsource.FontFamily, fontsource.Size).ToUIFont();
var iconcolor = fontsource.Color ?? _defaultColor;
var attString = new NSAttributedString(fontsource.Glyph, font: font, foregroundColor: iconcolor.ToUIColor());
var imagesize = ((NSString)fontsource.Glyph).GetSizeUsingAttributes(attString.GetUIKitAttributes(0, out _));
UIGraphics.BeginImageContextWithOptions(imagesize, false, 0f);
var ctx = new NSStringDrawingContext();
var boundingRect = attString.GetBoundingRect(imagesize, (NSStringDrawingOptions)0, ctx);
attString.DrawString(new RectangleF(
imagesize.Width / 2 - boundingRect.Size.Width / 2,
imagesize.Height / 2 - boundingRect.Size.Height / 2,
imagesize.Width,
imagesize.Height));
image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
if (image != null && iconcolor != _defaultColor)
{
image = image.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
}
}
return(Task.FromResult(image));
}
internal UIImage RenderImage(IFontImageSource imageSource, float scale)
{
var font = FontManager.GetFont(imageSource.Font);
var color = (imageSource.Color ?? Colors.White).ToPlatform();
var glyph = (NSString)imageSource.Glyph;
var attString = new NSAttributedString(glyph, font, color);
var imagesize = glyph.GetSizeUsingAttributes(attString.GetUIKitAttributes(0, out _));
UIGraphics.BeginImageContextWithOptions(imagesize, false, scale);
var ctx = new NSStringDrawingContext();
var boundingRect = attString.GetBoundingRect(imagesize, 0, ctx);
attString.DrawString(new CGRect(
imagesize.Width / 2 - boundingRect.Size.Width / 2,
imagesize.Height / 2 - boundingRect.Size.Height / 2,
imagesize.Width,
imagesize.Height));
var image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
return(image.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal));
}
public Task <UIImage> LoadImageAsync(ImageSource imagesource, CancellationToken cancelationToken = default, float scale = 1)
{
UIImage image = null;
if (imagesource is IconImageSource iconsource && IconFontRegistry.Instance.TryFindIconForKey(iconsource.Name, out var icon))
{
var iconcolor = iconsource.Color.IsDefault ? _defaultColor : iconsource.Color;
var imagesize = new SizeF((float)iconsource.Size, (float)iconsource.Size);
var font = UIFont.FromName(icon.FontFamily ?? string.Empty, (float)iconsource.Size) ??
UIFont.SystemFontOfSize((float)iconsource.Size);
UIGraphics.BeginImageContextWithOptions(imagesize, false, 0f);
var attString = new NSAttributedString(icon.Glyph, font: font, foregroundColor: iconcolor.ToUIColor());
var ctx = new NSStringDrawingContext();
var boundingRect = attString.GetBoundingRect(imagesize, (NSStringDrawingOptions)0, ctx);
attString.DrawString(new RectangleF(
(imagesize.Width / 2) - (boundingRect.Size.Width / 2),
(imagesize.Height / 2) - (boundingRect.Size.Height / 2),
imagesize.Width,
imagesize.Height));
image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
if (iconcolor != _defaultColor)
{
image = image.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
}
}
return(Task.FromResult(image));
}
public Task <UIImage> LoadImageAsync(
ImageSource imagesource,
CancellationToken cancelationToken = default(CancellationToken),
float scale = 1f)
{
UIImage image = null;
var fontsource = imagesource as FontImageSource;
if (fontsource != null)
{
var iconcolor = fontsource.Color != Color.Default ? fontsource.Color : Color.White;
var imagesize = new SizeF((float)fontsource.Size, (float)fontsource.Size);
var font = UIFont.FromName(fontsource.FontFamily ?? string.Empty, (float)fontsource.Size) ??
UIFont.SystemFontOfSize((float)fontsource.Size);
UIGraphics.BeginImageContextWithOptions(imagesize, false, 0f);
var attString = new NSAttributedString(fontsource.Glyph, font: font, foregroundColor: iconcolor.ToUIColor());
var ctx = new NSStringDrawingContext();
var boundingRect = attString.GetBoundingRect(imagesize, (NSStringDrawingOptions)0, ctx);
attString.DrawString(new RectangleF(
imagesize.Width / 2 - boundingRect.Size.Width / 2,
imagesize.Height / 2 - boundingRect.Size.Height / 2,
imagesize.Width,
imagesize.Height));
image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
if (iconcolor != Color.Default)
{
image = image.ImageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal);
}
}
return(Task.FromResult(image));
}
public static CGRect GetBoundingRect (this NSString This, CGSize size, NSStringDrawingOptions options, UIStringAttributes attributes, NSStringDrawingContext context)
{
// Define attributes
var attr = new NSMutableDictionary ();
attr.Add (NSFont.NameAttribute, attributes.Font.NSFont);
var rect = This.BoundingRectWithSize (size, options, attr);
// HACK: Cheating on the height
return new CGRect(rect.Left, rect.Top , rect.Width, rect.Height * 1.5f);
}
public static int resizeUILabelHeight(string text, UIFont font, nfloat width)
{
var nsText = new NSMutableAttributedString(text);
nsText.AddAttribute(UIStringAttributeKey.Font, font, new NSRange(0, nsText.Length));
var ctxt = new NSStringDrawingContext();
var expectedSize = nsText.GetBoundingRect(new CGSize(width, float.MaxValue),
NSStringDrawingOptions.UsesLineFragmentOrigin | NSStringDrawingOptions.UsesFontLeading,
ctxt).Size;
int expectedHeight = (int)Math.Round(expectedSize.Height);
return(expectedHeight);
}
/*
* Render the page here: we assume we are already in a normalized coordinate system which maps
* our standard aspect ratio (3:4) to (1:1)
* The reason why we do this is to reuse the same drawing code for both the preview and the
* full screen; for full screen rendering, we map the whole view, whereas the preview maps
* the whole preview image to a quarter of the page.
* */
public RectangleF [] RenderPage(Page page, SizeF size, bool unstyledDrawing)
{
var pageRect = new RectangleF(0, 0, size.Width, size.Height);
var paragraphBounds = new RectangleF [page.Paragraphs.Count];
using (var ctxt = UIGraphics.GetCurrentContext()) {
// fill background
ctxt.SetFillColor(UIColor.FromHSBA(0.11f, 0.2f, 1, 1).CGColor);
ctxt.FillRect(pageRect);
pageRect = pageRect.Inset(20, 20);
int i = 0;
foreach (var p in page.Paragraphs)
{
var bounds = new RectangleF(pageRect.X, pageRect.Y, 0, 0);
if (UnstyledDrawing)
{
var text = new NSString(page.StringForParagraph(p));
var font = UIFont.FromName("HoeflerText-Regular", 24);
// draw text with the old legacy path, setting the font color to black.
ctxt.SetFillColor(UIColor.Black.CGColor);
bounds.Size = text.DrawString(pageRect, font);
}
else
{
// TODO: draw attributed text with new string drawing
var text = page.AttributedStringForParagraph(p);
var textContext = new NSStringDrawingContext();
text.DrawString(pageRect, NSStringDrawingOptions.UsesLineFragmentOrigin, textContext);
bounds = textContext.TotalBounds;
bounds.Offset(pageRect.X, pageRect.Y);
}
paragraphBounds [i++] = bounds;
pageRect.Y += bounds.Height;
}
return(paragraphBounds);
}
}
public static UIImage ConvertFontIconToUIImage(string fontFamily, double fontSize, UIColor iconcolor, string glyph)
{
UIImage image = null;
var cleansedname = CleanseFontName(fontFamily);
var font = UIFont.FromName(cleansedname ?? string.Empty, (float)fontSize) ?? UIFont.SystemFontOfSize((float)fontSize);
var attString = new NSAttributedString(glyph, font: font, foregroundColor: iconcolor);
var imagesize = ((NSString)glyph).GetSizeUsingAttributes(attString.GetUIKitAttributes(0, out _));
UIGraphics.BeginImageContextWithOptions(imagesize, false, 0f);
var ctx = new NSStringDrawingContext();
var boundingRect = attString.GetBoundingRect(imagesize, 0, ctx);
attString.DrawString(new DrawRect((float)(imagesize.Width / 2 - boundingRect.Size.Width / 2), (float)(imagesize.Height / 2 - boundingRect.Size.Height / 2), (float)imagesize.Width, (float)imagesize.Height));
image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
return(image);
}
public CommentItemView(float height, string nameText, string dateText, string commentText) : base()
{
Frame = new RectangleF(0, height, 670, 65);
Image = new UIImageView(new RectangleF(32, 10, 50, 50));
Image.Layer.CornerRadius = 25f;
Image.Layer.MasksToBounds = true;
Add(Image);
Name = Constants.makeLabel(new RectangleF(106, 10, 150, 17), UIColor.Black, UITextAlignment.Left, Font.Regular, 14);
Name.Text = nameText;
Name.AdjustsFontSizeToFitWidth = true;
Add(Name);
Date = Constants.makeLabel(new RectangleF(226, 10, 150, 17), UIColor.Gray, UITextAlignment.Left, Font.Regular, 10);
Date.Text = dateText;
Date.AdjustsFontSizeToFitWidth = true;
Add(Date);
Comment = Constants.makeLabel(new RectangleF(106, 30, 520, 22), UIColor.Gray, UITextAlignment.Left, Font.Regular, 14);
Comment.Text = commentText;
Comment.Lines = 0;
Comment.LineBreakMode = UILineBreakMode.WordWrap;
Add(Comment);
/*resize height according to text*/
var nsText = new NSMutableAttributedString(Comment.Text);
nsText.AddAttribute(UIStringAttributeKey.Font, Comment.Font, new NSRange(0, nsText.Length));
var ctxt = new NSStringDrawingContext();
SizeF expectedSize = nsText.GetBoundingRect(new SizeF(520, float.MaxValue),
NSStringDrawingOptions.UsesLineFragmentOrigin | NSStringDrawingOptions.UsesFontLeading,
ctxt).Size;
int expectedHeight = (int)Math.Round(expectedSize.Height);
Comment.Frame = new RectangleF(106, 30, 520, expectedHeight);
Frame = new RectangleF(0, height, 670, 50 + expectedHeight);
}
/*
* Render the page here: we assume we are already in a normalized coordinate system which maps
* our standard aspect ratio (3:4) to (1:1)
* The reason why we do this is to reuse the same drawing code for both the preview and the
* full screen; for full screen rendering, we map the whole view, whereas the preview maps
* the whole preview image to a quarter of the page.
* */
public RectangleF [] RenderPage (Page page, SizeF size, bool unstyledDrawing)
{
var pageRect = new RectangleF (0, 0, size.Width, size.Height);
var paragraphBounds = new RectangleF [page.Paragraphs.Count];
using (var ctxt = UIGraphics.GetCurrentContext ()) {
// fill background
ctxt.SetFillColor (UIColor.FromHSBA (0.11f, 0.2f, 1, 1).CGColor);
ctxt.FillRect (pageRect);
pageRect = pageRect.Inset (20, 20);
int i = 0;
foreach (var p in page.Paragraphs) {
var bounds = new RectangleF (pageRect.X, pageRect.Y, 0, 0);
if (UnstyledDrawing) {
var text = new NSString (page.StringForParagraph (p));
var font = UIFont.FromName ("HoeflerText-Regular", 24);
// draw text with the old legacy path, setting the font color to black.
ctxt.SetFillColor (UIColor.Black.CGColor);
bounds.Size = text.DrawString (pageRect, font);
} else {
// TODO: draw attributed text with new string drawing
var text = page.AttributedStringForParagraph (p);
var textContext = new NSStringDrawingContext ();
text.DrawString (pageRect, NSStringDrawingOptions.UsesLineFragmentOrigin, textContext);
bounds = textContext.TotalBounds;
bounds.Offset (pageRect.X, pageRect.Y);
}
paragraphBounds [i++] = bounds;
pageRect.Y += bounds.Height;
}
return paragraphBounds;
}
}
