/// <summary>
/// Draw the background image at the required location repeating it over the X and Y axis.<br/>
/// Adjust location to left-top if starting location doesn't include all the range (adjusted to center or bottom/right).
/// </summary>
private static void DrawRepeat(IGraphics g, ImageLoadHandler imageLoadHandler, RectangleF rectangle, Rectangle srcRect, Rectangle destRect, Size imgSize)
{
while (destRect.X > rectangle.X)
destRect.X -= imgSize.Width;
while (destRect.Y > rectangle.Y)
destRect.Y -= imgSize.Height;
using (var brush = new TextureBrush(imageLoadHandler.Image, srcRect))
{
brush.TranslateTransform(destRect.X, destRect.Y);
g.FillRectangle(brush, rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
}
}
/// <summary>
/// Draw the background image at the required location repeating it over the Y axis.<br/>
/// Adjust location to top if starting location doesn't include all the range (adjusted to center or bottom).
/// </summary>
private static void DrawRepeatY(IGraphics g, ImageLoadHandler imageLoadHandler, RectangleF rectangle, Rectangle srcRect, Rectangle destRect, Size imgSize)
{
while (destRect.Y > rectangle.Y)
{
destRect.Y -= imgSize.Height;
}
using (var brush = new TextureBrush(imageLoadHandler.Image, srcRect))
{
brush.TranslateTransform(destRect.X, destRect.Y);
g.FillRectangle(brush, destRect.X, rectangle.Y, srcRect.Width, rectangle.Height);
}
}
/// <summary>
/// Draw the background image of the given box in the given rectangle.<br/>
/// Handle background-repeat and background-position values.
/// </summary>
/// <param name="g">the device to draw into</param>
/// <param name="box">the box to draw its background image</param>
/// <param name="imageLoadHandler">the handler that loads image to draw</param>
/// <param name="rectangle">the rectangle to draw image in</param>
public static void DrawBackgroundImage(IGraphics g, CssBox box, ImageLoadHandler imageLoadHandler, RectangleF rectangle)
{
// image size depends if specific rectangle given in image loader
var imgSize = new Size(imageLoadHandler.Rectangle == Rectangle.Empty ? imageLoadHandler.Image.Width : imageLoadHandler.Rectangle.Width,
imageLoadHandler.Rectangle == Rectangle.Empty ? imageLoadHandler.Image.Height : imageLoadHandler.Rectangle.Height);
// get the location by BackgroundPosition value
var location = GetLocation(box.BackgroundPosition, rectangle, imgSize);
var srcRect = imageLoadHandler.Rectangle == Rectangle.Empty
? new Rectangle(0, 0, imgSize.Width, imgSize.Height)
: new Rectangle(imageLoadHandler.Rectangle.Left, imageLoadHandler.Rectangle.Top, imgSize.Width, imgSize.Height);
// initial image destination rectangle
var destRect = new Rectangle(location, imgSize);
// need to clip so repeated image will be cut on rectangle
var prevClip = g.GetClip();
var lRectangle = rectangle;
lRectangle.Intersect(prevClip);
g.SetClip(lRectangle);
switch (box.BackgroundRepeat)
{
case "no-repeat":
g.DrawImage(imageLoadHandler.Image, destRect, srcRect);
break;
case "repeat-x":
DrawRepeatX(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
break;
case "repeat-y":
DrawRepeatY(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
break;
default:
DrawRepeat(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
break;
}
g.SetClip(prevClip);
}
/// <summary>
/// Draw the background image of the given box in the given rectangle.<br/>
/// Handle background-repeat and background-position values.
/// </summary>
/// <param name="g">the device to draw into</param>
/// <param name="box">the box to draw its background image</param>
/// <param name="imageLoadHandler">the handler that loads image to draw</param>
/// <param name="rectangle">the rectangle to draw image in</param>
public static void DrawBackgroundImage(IGraphics g, CssBox box, ImageLoadHandler imageLoadHandler, RectangleF rectangle)
{
// image size depends if specific rectangle given in image loader
var imgSize = new Size(imageLoadHandler.Rectangle == Rectangle.Empty ? imageLoadHandler.Image.Width : imageLoadHandler.Rectangle.Width,
imageLoadHandler.Rectangle == Rectangle.Empty ? imageLoadHandler.Image.Height : imageLoadHandler.Rectangle.Height);
// get the location by BackgroundPosition value
var location = GetLocation(box.BackgroundPosition, rectangle, imgSize);
var srcRect = imageLoadHandler.Rectangle == Rectangle.Empty
? new Rectangle(0, 0, imgSize.Width, imgSize.Height)
: new Rectangle(imageLoadHandler.Rectangle.Left, imageLoadHandler.Rectangle.Top, imgSize.Width, imgSize.Height);
// initial image destination rectangle
var destRect = new Rectangle(location, imgSize);
// need to clip so repeated image will be cut on rectangle
var prevClip = g.GetClip();
var lRectangle = rectangle;
lRectangle.Intersect(prevClip);
g.SetClip(lRectangle);
switch( box.BackgroundRepeat )
{
case "no-repeat":
g.DrawImage(imageLoadHandler.Image, destRect, srcRect);
break;
case "repeat-x":
DrawRepeatX(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
break;
case "repeat-y":
DrawRepeatY(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
break;
default:
DrawRepeat(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
break;
}
g.SetClip(prevClip);
}
/// <summary>
/// Assigns words its width and height
/// </summary>
/// <param name="g">the device to use</param>
internal override void MeasureWordsSize(IGraphics g)
{
if (!_wordsSizeMeasured)
{
if (_imageLoadHandler == null && HtmlContainer.AvoidImagesLateLoading)
{
_imageLoadHandler = new ImageLoadHandler(OnLoadImageComplete);
_imageLoadHandler.LoadImage(HtmlContainer, GetAttribute("src"), HtmlTag != null ? HtmlTag.Attributes : null);
}
MeasureWordSpacing(g);
_wordsSizeMeasured = true;
}
CssLayoutEngine.MeasureImageSize(_imageWord);
}
/// <summary>
/// Paints the fragment
/// </summary>
/// <param name="g">the device to draw to</param>
protected override void PaintImp(IGraphics g)
{
// load image iff it is in visible rectangle
if (_imageLoadHandler == null)
{
_imageLoadHandler = new ImageLoadHandler(OnLoadImageComplete);
_imageLoadHandler.LoadImage(HtmlContainer, GetAttribute("src"), HtmlTag != null ? HtmlTag.Attributes : null);
}
var rect = CommonUtils.GetFirstValueOrDefault(Rectangles);
PointF offset = HtmlContainer.ScrollOffset;
rect.Offset(offset);
var prevClip = RenderUtils.ClipGraphicsByOverflow(g, this);
PaintBackground(g, rect, true, true);
BordersDrawHandler.DrawBoxBorders(g, this, rect, true, true);
RectangleF r = _imageWord.Rectangle;
r.Offset(offset);
r.Height -= ActualBorderTopWidth + ActualBorderBottomWidth + ActualPaddingTop + ActualPaddingBottom;
r.Y += ActualBorderTopWidth + ActualPaddingTop;
if (_imageWord.Image != null)
{
if (_imageWord.ImageRectangle == Rectangle.Empty)
g.DrawImage(_imageWord.Image, Rectangle.Round(r));
else
g.DrawImage(_imageWord.Image, Rectangle.Round(r), _imageWord.ImageRectangle);
if (_imageWord.Selected)
{
g.FillRectangle(GetSelectionBackBrush(true), _imageWord.Left + offset.X, _imageWord.Top + offset.Y, _imageWord.Width+2, DomUtils.GetCssLineBoxByWord(_imageWord).LineHeight);
}
}
else if (_imageLoadingComplete)
{
if (_imageLoadingComplete && r.Width > 19 && r.Height > 19)
{
RenderUtils.DrawImageErrorIcon(g, r);
}
}
else
{
RenderUtils.DrawImageLoadingIcon(g, r);
if (r.Width > 19 && r.Height > 19)
{
g.DrawRectangle(Pens.LightGray, r.X, r.Y, r.Width, r.Height);
}
}
RenderUtils.ReturnClip(g, prevClip);
}
/// <summary>
/// Create image handler for downloading video image if found and release the WebClient instance used for API call.
/// </summary>
private void HandlePostApiCall(object sender)
{
try
{
if (_videoImageUrl != null)
{
_imageLoadHandler = new ImageLoadHandler(OnLoadImageComplete);
_imageLoadHandler.LoadImage(HtmlContainer, _videoImageUrl, HtmlTag != null ? HtmlTag.Attributes : null);
}
else
{
_imageLoadingComplete = true;
SetErrorBorder();
}
var webClient = (WebClient)sender;
webClient.DownloadStringCompleted -= OnDownloadYoutubeApiCompleted;
webClient.DownloadStringCompleted -= OnDownloadVimeoApiCompleted;
webClient.Dispose();
HtmlContainer.RequestRefresh(IsLayoutRequired());
}
catch
{}
}
/// <summary>
/// Assigns words its width and height
/// </summary>
/// <param name="g"></param>
internal virtual void MeasureWordsSize(IGraphics g)
{
if (!_wordsSizeMeasured)
{
if (BackgroundImage != CssConstants.None && _imageLoadHandler == null)
{
_imageLoadHandler = new ImageLoadHandler(OnImageLoadComplete);
_imageLoadHandler.LoadImage(HtmlContainer, BackgroundImage, HtmlTag != null ? HtmlTag.Attributes : null);
}
MeasureWordSpacing(g);
if (Words.Count > 0)
{
foreach (var boxWord in Words)
{
boxWord.Width = boxWord.Text != "\n" ? FontsUtils.MeasureStringWidth(g, boxWord.Text, ActualFont) : 0;
boxWord.Height = FontsUtils.GetFontHeight(ActualFont);
}
}
_wordsSizeMeasured = true;
}
}