// ============================================================================================================
// SetHtml, Render, Reset
// ============================================================================================================
public void SetHtml(string html, int width, bool collapseContent = false)
{
if (html == m_CachedHtml && m_MaxWidth == width && m_CollapseToContent == collapseContent)
{
return;
}
m_CachedHtml = html;
m_MaxWidth = width;
m_CollapseToContent = collapseContent;
Reset();
if (string.IsNullOrEmpty(html))
{
m_Root = null;
}
else
{
m_Root = ParseHtmlToBlocks(html);
GetAllImages(m_Root);
m_Links = GetAllHrefRegionsInBlock(m_Root);
DoLayout(m_Root, width);
if (Ascender != 0)
{
m_Root.Height -= Ascender; // ascender should always be negative.
}
}
}
/// <summary>
/// Renders all the elements in the root branch. At the same time, also sets areas for regions and href links.
/// TODO: code for setting areas for regions / hrefs belongs in layout code in HtmlDocument.
/// </summary>
public Texture2D Render(BlockElement root, int ascender, HtmlLinkList links)
{
SpriteBatchUI sb = Service.Get <SpriteBatchUI>();
GraphicsDevice graphics = sb.GraphicsDevice;
if (root == null || root.Width == 0 || root.Height == 0) // empty text string
{
return(new Texture2D(graphics, 1, 1));
}
uint[] pixels = new uint[root.Width * root.Height];
if (root.Err_Cant_Fit_Children)
{
for (int i = 0; i < pixels.Length; i++)
{
pixels[i] = 0xffffff00;
}
Tracer.Error("Err: Block can't fit children.");
}
else
{
unsafe
{
fixed(uint *ptr = pixels)
{
DoRenderBlock(root, ascender, links, ptr, root.Width, root.Height);
}
}
}
Texture2D texture = new Texture2D(graphics, root.Width, root.Height, false, SurfaceFormat.Color);
texture.SetData(pixels);
return(texture);
}
unsafe void DoRenderBlock(BlockElement root, int ascender, HtmlLinkList links, uint *ptr, int width, int height)
{
foreach (AElement e in root.Children)
{
int x = e.Layout_X;
int y = e.Layout_Y - ascender; // ascender is always negative.
StyleState style = e.Style;
if (e is CharacterElement)
{
IFont font = style.Font;
ICharacter character = font.GetCharacter((e as CharacterElement).Character);
// HREF links should be colored white, because we will hue them at runtime.
uint color = style.IsHREF ? 0xFFFFFFFF : Utility.UintFromColor(style.Color);
character.WriteToBuffer(ptr, x, y, width, height, font.Baseline, style.IsBold, style.IsItalic, style.IsUnderlined, style.DrawOutline, color, 0xFF000008);
// offset y by ascender for links...
if (character.YOffset < 0)
{
y += character.YOffset;
height -= character.YOffset;
}
}
else if (e is ImageElement)
{
ImageElement image = (e as ImageElement);
image.AssociatedImage.Area = new Rectangle(x, y, image.Width, image.Height);
if (style.IsHREF)
{
links.AddLink(style, new Rectangle(x, y, e.Width, e.Height));
image.AssociatedImage.LinkIndex = links.Count;
}
}
else if (e is BlockElement)
{
DoRenderBlock(e as BlockElement, ascender, links, ptr, width, height);
}
// set href link regions
if (style.IsHREF)
{
links.AddLink(style, new Rectangle(x, y, e.Width, e.Height));
}
}
}
private void GetHREFRegions(HtmlLinkList regions, List<AElement>[] text, int[] x, int y)
{
for (int alignment = 0; alignment < 3; alignment++)
{
// variables for the open href region
bool isRegionOpen = false;
HtmlLink region = null;
int regionHeight = 0;
int additionalwidth = 0;
int dx = x[alignment];
for (int i = 0; i < text[alignment].Count; i++)
{
AElement atom = text[alignment][i];
if ((region == null && atom.Style.HREF != null) ||
(region != null && atom.Style.HREF != region.HREF))
{
// close the current href tag if one is open.
if (isRegionOpen)
{
region.Area.Width = (dx - region.Area.X) + additionalwidth;
region.Area.Height = (y + regionHeight - region.Area.Y);
isRegionOpen = false;
region = null;
}
// did we open a href?
if (atom.Style.HREF != null)
{
isRegionOpen = true;
//region = regions.AddLink(atom.Style.HREF, atom.Style);
//region.Area.X = dx;
//region.Area.Y = y;
//regionHeight = 0;
}
}
if (atom is ImageElement)
{
// we need regions for images so that we can do mouse over images.
// if we're currently in an open href region, we'll use that one.
// if we don't have an open region, we'll create one just for this image.
HtmlImage image = ((ImageElement)atom).AssociatedImage;
if (image != null)
{
if (!isRegionOpen)
{
//region = regions.AddLink(atom.Style.HREF, atom.Style);
//isRegionOpen = true;
//region.Area.X = dx;
//region.Area.Y = y;
//regionHeight = 0;
}
image.LinkIndex = region.Index;
}
}
dx += atom.Width;
if (atom is CharacterElement && ((CharacterElement)atom).Style.IsItalic)
additionalwidth = 2;
else if (atom is CharacterElement && ((CharacterElement)atom).Style.MustDrawnOutline)
additionalwidth = 2;
else
additionalwidth = 0;
if (isRegionOpen && atom.Height > regionHeight)
regionHeight = atom.Height;
}
// we've reached the last atom in this set.
// if a href tag is still open, close it.
if (isRegionOpen)
{
region.Area.Width = (dx - region.Area.X);
region.Area.Height = (y + regionHeight - region.Area.Y);
}
}
}
private void GetHREFRegions(HtmlLinkList regions, List <AElement>[] text, int[] x, int y)
{
for (int alignment = 0; alignment < 3; alignment++)
{
// variables for the open href region
bool isRegionOpen = false;
HtmlLink region = null;
int regionHeight = 0;
int additionalwidth = 0;
int dx = x[alignment];
for (int i = 0; i < text[alignment].Count; i++)
{
AElement atom = text[alignment][i];
if ((region == null && atom.Style.HREF != null) ||
(region != null && atom.Style.HREF != region.HREF))
{
// close the current href tag if one is open.
if (isRegionOpen)
{
region.Area.Width = (dx - region.Area.X) + additionalwidth;
region.Area.Height = (y + regionHeight - region.Area.Y);
isRegionOpen = false;
region = null;
}
// did we open a href?
if (atom.Style.HREF != null)
{
isRegionOpen = true;
//region = regions.AddLink(atom.Style.HREF, atom.Style);
//region.Area.X = dx;
//region.Area.Y = y;
//regionHeight = 0;
}
}
if (atom is ImageElement)
{
// we need regions for images so that we can do mouse over images.
// if we're currently in an open href region, we'll use that one.
// if we don't have an open region, we'll create one just for this image.
HtmlImage image = ((ImageElement)atom).AssociatedImage;
if (image != null)
{
if (!isRegionOpen)
{
//region = regions.AddLink(atom.Style.HREF, atom.Style);
//isRegionOpen = true;
//region.Area.X = dx;
//region.Area.Y = y;
//regionHeight = 0;
}
image.LinkIndex = region.Index;
}
}
dx += atom.Width;
if (atom is CharacterElement && ((CharacterElement)atom).Style.IsItalic)
{
additionalwidth = 2;
}
else if (atom is CharacterElement && ((CharacterElement)atom).Style.MustDrawnOutline)
{
additionalwidth = 2;
}
else
{
additionalwidth = 0;
}
if (isRegionOpen && atom.Height > regionHeight)
{
regionHeight = atom.Height;
}
}
// we've reached the last atom in this set.
// if a href tag is still open, close it.
if (isRegionOpen)
{
region.Area.Width = (dx - region.Area.X);
region.Area.Height = (y + regionHeight - region.Area.Y);
}
}
}
