/// <summary>
/// Ensures that the specified length is converted to pixels if necessary
/// </summary>
/// <param name="length"></param>
protected string NoEms(string length)
{
var len = new CssLength(length);
if (len.Unit == CssUnit.Ems)
{
length = len.ConvertEmToPixels(GetEmHeight()).ToString();
}
return(length);
}
/// <summary>
/// Gets the available width for the whole table.
/// It also sets the value of WidthSpecified
/// </summary>
/// <returns></returns>
/// <remarks>
/// The table's width can be larger than the result of this method, because of the minimum
/// size that individual boxes.
/// </remarks>
private float GetMaxTableWidth()
{
var tblen = new CssLength(_tableBox.MaxWidth);
if (tblen.Number > 0)
{
_widthSpecified = true;
return(CssValueParser.ParseLength(_tableBox.MaxWidth, _tableBox.ParentBox.AvailableWidth, _tableBox));
}
else
{
return(9999f);
}
}
/// <summary>
/// On image load process is complete with image or without update the image box.
/// </summary>
/// <param name="image">the image loaded or null if failed</param>
/// <param name="rectangle">the source rectangle to draw in the image (empty - draw everything)</param>
/// <param name="async">is the callback was called async to load image call</param>
private void OnLoadImageComplete(Image image, Rectangle rectangle, bool async)
{
_imageWord.Image = image;
_imageWord.ImageRectangle = rectangle;
_imageLoadingComplete = true;
_wordsSizeMeasured = false;
if (_imageLoadingComplete && image == null)
{
SetErrorBorder();
}
if (!HtmlContainer.AvoidImagesLateLoading || async)
{
var width = new CssLength(Width);
var height = new CssLength(Height);
bool layout = (width.Number <= 0 || width.Unit != CssUnit.Pixels) ||
(height.Number <= 0 || height.Unit != CssUnit.Pixels);
HtmlContainer.RequestRefresh(layout);
}
}
/// <summary>
/// Measure image box size by the width\height set on the box and the actual rendered image size.<br/>
/// If no image exists for the box error icon will be set.
/// </summary>
/// <param name="imageWord">the image word to measure</param>
public static void MeasureImageSize(CssRectImage imageWord)
{
ArgChecker.AssertArgNotNull(imageWord, "imageWord");
ArgChecker.AssertArgNotNull(imageWord.OwnerBox, "imageWord.OwnerBox");
var width = new CssLength(imageWord.OwnerBox.Width);
var height = new CssLength(imageWord.OwnerBox.Height);
bool hasImageTagWidth = width.Number > 0 && width.Unit == CssUnit.Pixels;
bool hasImageTagHeight = height.Number > 0 && height.Unit == CssUnit.Pixels;
bool scaleImageHeight = false;
if (hasImageTagWidth)
{
imageWord.Width = width.Number;
}
else if (width.Number > 0 && width.IsPercentage)
{
imageWord.Width = width.Number * imageWord.OwnerBox.ContainingBlock.Size.Width;
scaleImageHeight = true;
}
else if (imageWord.Image != null)
{
imageWord.Width = imageWord.ImageRectangle == Rectangle.Empty
? imageWord.Image.Width
: imageWord.ImageRectangle.Width;
}
else
{
imageWord.Width = hasImageTagHeight ? height.Number / 1.14f : 20;
}
var maxWidth = new CssLength(imageWord.OwnerBox.MaxWidth);
if (maxWidth.Number > 0)
{
float maxWidthVal = -1;
if (maxWidth.Unit == CssUnit.Pixels)
{
maxWidthVal = maxWidth.Number;
}
else if (maxWidth.IsPercentage)
{
maxWidthVal = maxWidth.Number * imageWord.OwnerBox.ContainingBlock.Size.Width;
}
if (maxWidthVal > -1 && imageWord.Width > maxWidthVal)
{
imageWord.Width = maxWidthVal;
scaleImageHeight = !hasImageTagHeight;
}
}
if (hasImageTagHeight)
{
imageWord.Height = height.Number;
}
else if (imageWord.Image != null)
{
imageWord.Height = imageWord.ImageRectangle == Rectangle.Empty
? imageWord.Image.Height
: imageWord.ImageRectangle.Height;
}
else
{
imageWord.Height = imageWord.Width > 0 ? imageWord.Width * 1.14f : 22.8f;
}
if (imageWord.Image != null)
{
// If only the width was set in the html tag, ratio the height.
if ((hasImageTagWidth && !hasImageTagHeight) || scaleImageHeight)
{
// Divide the given tag width with the actual image width, to get the ratio.
float ratio = imageWord.Width / imageWord.Image.Width;
imageWord.Height = imageWord.Image.Height * ratio;
}
// If only the height was set in the html tag, ratio the width.
else if (hasImageTagHeight && !hasImageTagWidth)
{
// Divide the given tag height with the actual image height, to get the ratio.
float ratio = imageWord.Height / imageWord.Image.Height;
imageWord.Width = imageWord.Image.Width * ratio;
}
}
imageWord.Height += imageWord.OwnerBox.ActualBorderBottomWidth + imageWord.OwnerBox.ActualBorderTopWidth +
imageWord.OwnerBox.ActualPaddingTop + imageWord.OwnerBox.ActualPaddingBottom;
}
/// <summary>
/// Determine Row and Column Count, and ColumnWidths
/// </summary>
/// <returns></returns>
private float CalculateCountAndWidth()
{
//Columns
if (_columns.Count > 0)
{
_columnCount = _columns.Count;
}
else
{
foreach (CssBox b in _allRows)
{
_columnCount = Math.Max(_columnCount, b.Boxes.Count);
}
}
//Initialize column widths array with NaNs
_columnWidths = new float[_columnCount];
for (int i = 0; i < _columnWidths.Length; i++)
{
_columnWidths[i] = float.NaN;
}
float availCellSpace = GetAvailableCellWidth();
if (_columns.Count > 0)
{
// Fill ColumnWidths array by scanning column widths
for (int i = 0; i < _columns.Count; i++)
{
var len = new CssLength(_columns[i].Width); //Get specified width
if (len.Number > 0) //If some width specified
{
if (len.IsPercentage) //Get width as a percentage
{
_columnWidths[i] = CssValueParser.ParseNumber(_columns[i].Width, availCellSpace);
}
else if (len.Unit == CssUnit.Pixels || len.Unit == CssUnit.None)
{
_columnWidths[i] = len.Number; //Get width as an absolute-pixel value
}
}
}
}
else
{
// Fill ColumnWidths array by scanning width in table-cell definitions
foreach (CssBox row in _allRows)
{
//Check for column width in table-cell definitions
for (int i = 0; i < _columnCount; i++)
{
if (i < 20 || float.IsNaN(_columnWidths[i])) // limit column width check
{
if (i < row.Boxes.Count && row.Boxes[i].Display == CssConstants.TableCell)
{
float len = CssValueParser.ParseLength(row.Boxes[i].Width, availCellSpace, row.Boxes[i]);
if (len > 0) //If some width specified
{
int colspan = GetColSpan(row.Boxes[i]);
len /= Convert.ToSingle(colspan);
for (int j = i; j < i + colspan; j++)
{
_columnWidths[j] = float.IsNaN(_columnWidths[j])
? len
: Math.Max(_columnWidths[j], len);
}
}
}
}
}
}
}
return(availCellSpace);
}