/// <summary>
/// Create a sprite image from a list of images and the CSS to render each image.
/// </summary>
/// <param name="images">The list of images to include in the sprite.</param>
/// <param name="placeholderImages">The list of custom placeholder images.</param>
/// <param name="spriteSettings">The settings to use when creating the sprite.</param>
public void CreateSprite(IReadOnlyCollection<ISpriteImage> images, IReadOnlyCollection<ISpriteImage> placeholderImages, SpriteSettings spriteSettings)
{
if (images == null)
{
throw new ArgumentNullException(nameof(images));
}
if (images.GroupBy(x => x.Key).Any(x => x.Skip(1).Any()))
{
throw new ArgumentException("The list of keys must be unique.", nameof(images));
}
if (placeholderImages == null || !placeholderImages.Any())
{
placeholderImages = DefaultPlaceholderImages;
}
if (placeholderImages.GroupBy(x => x.Key).Any(x => x.Skip(1).Any()))
{
throw new ArgumentException("The list of keys must be unique.", nameof(placeholderImages));
}
if (spriteSettings == null)
{
throw new ArgumentNullException(nameof(spriteSettings));
}
var spritePlaceholderImages = new List<SpritePlaceholderImage>();
using (var spriteImages = new MagickImageCollection())
{
var css = new StringBuilder();
var nextSpriteImageTop = 0;
foreach (ISpriteImage image in images)
{
var hasImageBeenAddedToSprite = false;
int selectedImageHeight;
int selectedImageTop;
int selectedImageWidth;
var selectedHoverImageHeight = 0;
var selectedHoverImageTop = 0;
var selectedHoverImageWidth = 0;
MagickImage imageForSprite = ImageToMagickImage(image);
if (imageForSprite != null)
{
spriteImages.Add(imageForSprite);
hasImageBeenAddedToSprite = true;
selectedImageTop = nextSpriteImageTop;
selectedImageHeight = imageForSprite.Height;
selectedImageWidth = imageForSprite.Width;
}
else
{
string selectedPlaceholderImageKey = placeholderImages.Any(x => x.Key == image.PlaceholderImageKey) ? image.PlaceholderImageKey : placeholderImages.First().Key;
ISpriteImage selectedPlaceholderImage = placeholderImages.FirstOrDefault(x => x.Key == selectedPlaceholderImageKey);
imageForSprite = ImageToMagickImage(selectedPlaceholderImage);
SpritePlaceholderImage spritePlaceholderImage = spritePlaceholderImages.FirstOrDefault(x => x.Key == selectedPlaceholderImageKey && x.Width == imageForSprite.Width && x.Height == imageForSprite.Height);
if (spritePlaceholderImage == null)
{
spritePlaceholderImage = new SpritePlaceholderImage(selectedPlaceholderImageKey, nextSpriteImageTop, imageForSprite.Height, imageForSprite.Width);
spritePlaceholderImages.Add(spritePlaceholderImage);
spriteImages.Add(imageForSprite);
hasImageBeenAddedToSprite = true;
}
selectedImageTop = spritePlaceholderImage.Top;
selectedImageHeight = spritePlaceholderImage.Height;
selectedImageWidth = spritePlaceholderImage.Width;
}
string selectedImageTopText = selectedImageTop != 0 ? $"-{selectedImageTop}px" : "0";
css.Append($"#{image.Key}{{height:{selectedImageHeight}px;width:{selectedImageWidth}px;background:url('{spriteSettings.SpriteUrl}') 0 {selectedImageTopText};}}");
if (hasImageBeenAddedToSprite)
{
nextSpriteImageTop += selectedImageHeight;
}
if (image.HoverImage != null)
{
MagickImage hoverImageForSprite = ImageToMagickImage(image.HoverImage, imageForSprite);
if (hoverImageForSprite != null)
{
spriteImages.Add(hoverImageForSprite);
hasImageBeenAddedToSprite = true;
selectedHoverImageTop = nextSpriteImageTop;
selectedHoverImageHeight = hoverImageForSprite.Height;
selectedHoverImageWidth = hoverImageForSprite.Width;
}
string selectedHoverImageTopText = selectedHoverImageTop != 0 ? $"-{selectedHoverImageTop}px" : "0";
css.Append($"#{image.Key}:hover{{height:{selectedHoverImageHeight}px;width:{selectedHoverImageWidth}px;background:url('{spriteSettings.SpriteUrl}') 0 {selectedHoverImageTopText};}}");
if (hasImageBeenAddedToSprite)
{
nextSpriteImageTop += selectedHoverImageHeight;
}
}
}
_imageProcessor.CreateSprite(spriteImages, spriteSettings.SpriteFilename);
_cssProcessor.CreateCss(css.ToString(), spriteSettings.CssFilename);
}
}
/// <summary>
/// Create a sprite image from a list of images and the CSS to render each image.
/// </summary>
/// <param name="images">The list of images to include in the sprite.</param>
/// <param name="placeholderImages">The list of custom placeholder images.</param>
/// <param name="spriteSettings">The settings to use when creating the sprite.</param>
public void CreateSprite(IReadOnlyCollection <ISpriteImage> images, IReadOnlyCollection <ISpriteImage> placeholderImages, SpriteSettings spriteSettings)
{
if (images == null)
{
throw new ArgumentNullException(nameof(images));
}
if (images.GroupBy(x => x.Key).Any(x => x.Skip(1).Any()))
{
throw new ArgumentException("The list of keys must be unique.", nameof(images));
}
if (placeholderImages == null || !placeholderImages.Any())
{
placeholderImages = DefaultPlaceholderImages;
}
if (placeholderImages.GroupBy(x => x.Key).Any(x => x.Skip(1).Any()))
{
throw new ArgumentException("The list of keys must be unique.", nameof(placeholderImages));
}
if (spriteSettings == null)
{
throw new ArgumentNullException(nameof(spriteSettings));
}
var spritePlaceholderImages = new List <SpritePlaceholderImage>();
using (var spriteImages = new MagickImageCollection())
{
var css = new StringBuilder();
var nextSpriteImageTop = 0;
foreach (var image in images)
{
var hasImageBeenAddedToSprite = false;
int selectedImageHeight;
int selectedImageTop;
int selectedImageWidth;
var selectedHoverImageHeight = 0;
var selectedHoverImageTop = 0;
var selectedHoverImageWidth = 0;
var imageForSprite = ImageToMagickImage(image);
if (imageForSprite != null)
{
spriteImages.Add(imageForSprite);
hasImageBeenAddedToSprite = true;
selectedImageTop = nextSpriteImageTop;
selectedImageHeight = imageForSprite.Height;
selectedImageWidth = imageForSprite.Width;
}
else
{
var selectedPlaceholderImageKey = placeholderImages.Any(x => x.Key == image.PlaceholderImageKey) ? image.PlaceholderImageKey : placeholderImages.First().Key;
var selectedPlaceholderImage = placeholderImages.FirstOrDefault(x => x.Key == selectedPlaceholderImageKey);
imageForSprite = ImageToMagickImage(selectedPlaceholderImage);
var spritePlaceholderImage = spritePlaceholderImages.FirstOrDefault(x => x.Key == selectedPlaceholderImageKey && x.Width == imageForSprite.Width && x.Height == imageForSprite.Height);
if (spritePlaceholderImage == null)
{
spritePlaceholderImage = new SpritePlaceholderImage(selectedPlaceholderImageKey, nextSpriteImageTop, imageForSprite.Height, imageForSprite.Width);
spritePlaceholderImages.Add(spritePlaceholderImage);
spriteImages.Add(imageForSprite);
hasImageBeenAddedToSprite = true;
}
selectedImageTop = spritePlaceholderImage.Top;
selectedImageHeight = spritePlaceholderImage.Height;
selectedImageWidth = spritePlaceholderImage.Width;
}
var selectedImageTopText = selectedImageTop != 0 ? $"-{selectedImageTop}px" : "0";
// Not sure if this should be more robust/precise, it's currently just escaping any invalid characters it finds based on a set of invalid css characters.
var regex = new Regex(@"[!""#$%&'()\*\+,\./:;<=>\?@\[\\\]^`{\|}~ ]");
var imageKey = regex.Replace(image.Key, m => $"\\{m.Value}");
css.Append($".{imageKey}{{height:{selectedImageHeight}px;width:{selectedImageWidth}px;background:url('{spriteSettings.SpriteUrl}') 0 {selectedImageTopText};}}");
if (hasImageBeenAddedToSprite)
{
nextSpriteImageTop += selectedImageHeight;
}
if (image.HoverImage != null)
{
var hoverImageForSprite = ImageToMagickImage(image.HoverImage, imageForSprite);
if (hoverImageForSprite != null)
{
spriteImages.Add(hoverImageForSprite);
hasImageBeenAddedToSprite = true;
selectedHoverImageTop = nextSpriteImageTop;
selectedHoverImageHeight = hoverImageForSprite.Height;
selectedHoverImageWidth = hoverImageForSprite.Width;
}
var selectedHoverImageTopText = selectedHoverImageTop != 0 ? $"-{selectedHoverImageTop}px" : "0";
css.Append($".{image.Key}:hover{{height:{selectedHoverImageHeight}px;width:{selectedHoverImageWidth}px;background:url('{spriteSettings.SpriteUrl}') 0 {selectedHoverImageTopText};}}");
if (hasImageBeenAddedToSprite)
{
nextSpriteImageTop += selectedHoverImageHeight;
}
}
}
_imageProcessor.CreateSprite(spriteImages, spriteSettings.SpriteFilename);
_cssProcessor.CreateCss(css.ToString(), spriteSettings.CssFilename);
}
}
