public void AddAtom(AElement atom)
{
Children.Add(atom);
if (atom is BlockElement)
{
(atom as BlockElement).Parent = this;
}
}
public void ParseTag(HTMLchunk chunk, AElement atom)
{
if (!chunk.bClosure || chunk.bEndClosure)
{
// create the tag and add it to the list of open tags.
OpenTag tag = new OpenTag(chunk);
m_OpenTags.Add(tag);
// parse the tag (which will update the StyleParser's current style
ParseTag(tag, atom);
// if the style has changed and atom is not null, set the atom's style to the current style.
if (atom != null)
atom.Style = Style;
// if this is a self-closing tag (<br/>) close it!
if (chunk.bEndClosure)
CloseOneTag(chunk);
}
else
{
CloseOneTag(chunk);
}
}
// ======================================================================
// Old code
// ======================================================================
private void DoLayoutOld(AElement root, int maxwidth, out int width, out int height, out int ascender)
{
// default values for out variables.
width = 0;
height = 0;
ascender = 0;
// local variables
int descenderHeight = 0;
int lineHeight = 0;
int styleWidth = 0; // italic + outlined characters need more room for the slant/outline.
int widestLine = maxwidth; // we automatically set the content to fill the specified width.
int wordWidth = 0;
bool firstLine = true;
List<AElement> word = new List<AElement>();
List<AElement> elements = null;
for (int i = 0; i < elements.Count; i++)
{
wordWidth += elements[i].Width;
styleWidth -= elements[i].Width;
if (styleWidth < 0)
styleWidth = 0;
if (lineHeight < elements[i].Height)
{
lineHeight = elements[i].Height;
}
if (elements[i].IsThisAtomALineBreak)
{
if (width + styleWidth > widestLine)
widestLine = width + styleWidth;
height += lineHeight;
descenderHeight = 0;
lineHeight = 0;
width = 0;
firstLine = false;
}
else
{
word.Add(elements[i]);
// we may need to add additional width for special style characters.
if (elements[i] is CharacterElement)
{
CharacterElement atom = (CharacterElement)elements[i];
IFont font = atom.Style.Font;
ICharacter ch = font.GetCharacter(atom.Character);
// italic characters need a little extra width if they are at the end of the line.
if (atom.Style.IsItalic)
styleWidth = font.Height / 2;
if (atom.Style.MustDrawnOutline)
styleWidth += 2;
if (ch.YOffset + ch.Height - lineHeight > descenderHeight)
descenderHeight = ch.YOffset + ch.Height - lineHeight;
if (ch.YOffset < 0 && firstLine && ascender > ch.YOffset)
ascender = ch.YOffset;
}
if (i == elements.Count - 1 || elements[i + 1].CanBreakAtThisAtom)
{
// Now make sure this line can fit the word.
if (width + wordWidth + styleWidth <= maxwidth)
{
// it can fit!
width += wordWidth + styleWidth;
wordWidth = 0;
word.Clear();
// if this word is followed by a space, does it fit? If not, drop it entirely and insert \n after the word.
if (!(i == elements.Count - 1) && elements[i + 1].IsThisAtomABreakingSpace)
{
int charwidth = elements[i + 1].Width;
if (width + charwidth <= maxwidth)
{
// we can fit an extra space here.
width += charwidth;
i++;
}
else
{
// can't fit an extra space on the end of the line. replace the space with a \n.
((CharacterElement)elements[i + 1]).Character = '\n';
}
}
}
else
{
// this word cannot fit in the current line.
if ((width > 0) && (i - word.Count >= 0))
{
// if this is the last word in a line. Replace the last space character with a line break
// and back up to the beginning of this word.
if (elements[i - word.Count].IsThisAtomABreakingSpace)
{
((CharacterElement)elements[i - word.Count]).Character = '\n';
i = i - word.Count - 1;
}
else
{
StyleState inheritedStyle = elements[i - word.Count].Style;
elements.Insert(i - word.Count, new CharacterElement(inheritedStyle, '\n'));
i = i - word.Count;
}
word.Clear();
wordWidth = 0;
}
else
{
// this is the only word on the line and we will need to split it.
// first back up until we've reached the reduced the size of the word
// so that it fits on one line, and split it there.
int iWordWidth = wordWidth;
for (int j = word.Count - 1; j >= 1; j--)
{
int iDashWidth = word[j].Style.Font.GetCharacter('-').Width;
if (iWordWidth + iDashWidth <= maxwidth)
{
StyleState inheritedStyle = elements[i - (word.Count - j) + 1].Style;
elements.Insert(i - (word.Count - j) + 1, new CharacterElement(inheritedStyle, '\n'));
elements.Insert(i - (word.Count - j) + 1, new CharacterElement(inheritedStyle, '-'));
break;
}
iWordWidth -= word[j].Width;
}
i -= word.Count + 2;
word.Clear();
width = 0;
wordWidth = 0;
if (i < 0)
{
// the texture size is too small to hold this small number of characters. This is a problem.
i = -1;
return;
}
}
}
}
}
}
width += styleWidth;
height += lineHeight + descenderHeight;
if (widestLine > width)
width = widestLine;
}
private void ParseTag(OpenTag tag, AElement atom = null)
{
switch (tag.sTag)
{
case "b":
Style.IsBold = true;
break;
case "i":
Style.IsItalic = true;
break;
case "u":
Style.IsUnderlined = true;
break;
case "outline":
Style.IsOutlined = true;
break;
case "big":
Style.Font = m_Provider.GetUnicodeFont((int)Fonts.UnicodeBig);
break;
case "basefont":
case "medium":
Style.Font = m_Provider.GetUnicodeFont((int)Fonts.UnicodeMedium);
break;
case "small":
Style.Font = m_Provider.GetUnicodeFont((int)Fonts.UnicodeSmall);
break;
case "left":
if (atom != null && atom is BlockElement)
(atom as BlockElement).Alignment = Alignments.Left;
break;
case "center":
if (atom != null && atom is BlockElement)
(atom as BlockElement).Alignment = Alignments.Center;
break;
case "right":
if (atom != null && atom is BlockElement)
(atom as BlockElement).Alignment = Alignments.Right;
break;
}
foreach (DictionaryEntry param in tag.oParams)
{
// get key and value for this tag param
string key = param.Key.ToString();
string value = param.Value.ToString();
if (value.StartsWith("0x"))
value = Utility.ToInt32(value).ToString();
// trim trailing forward slash.
if (value.EndsWith("/"))
value = value.Substring(0, value.Length - 1);
switch (key)
{
case "href":
// href paramater can only be used on 'anchor' tags.
if (tag.sTag == "a")
{
Style.HREF = value;
}
break;
case "color":
case "hovercolor":
case "activecolor":
// get the color!
string color = value;
Color? c = null;
if (color[0] == '#')
{
color = color.Substring(1);
if (color.Length == 3 || color.Length == 6)
{
c = Utility.ColorFromHexString(color);
}
}
else
{
//try to parse color by name
c = Utility.ColorFromString(color);
}
if (c.HasValue)
{
if (key == "color")
{
Style.Color = c.Value;
}
if (tag.sTag == "a")
{
// a tag colors are override, they are rendered white and then hued with a websafe hue.
switch (key)
{
case "color":
Style.ColorHue = m_Provider.GetWebSafeHue(c.Value);
break;
case "hovercolor":
Style.HoverColorHue = m_Provider.GetWebSafeHue(c.Value);
break;
case "activecolor":
Style.ActiveColorHue = m_Provider.GetWebSafeHue(c.Value);
break;
default:
Tracer.Warn("Only anchor <a> tags can have attribute {0}.", key);
break;
}
}
}
else
Tracer.Warn("Improperly formatted color:" + color);
break;
case "src":
case "hoversrc":
case "activesrc":
if (atom is ImageElement)
{
if (key == "src")
(atom as ImageElement).ImgSrc = int.Parse(value);
else if (key == "hoversrc")
(atom as ImageElement).ImgSrcOver = int.Parse(value);
else if (key == "activesrc")
(atom as ImageElement).ImgSrcDown = int.Parse(value);
break;
}
else
{
Tracer.Warn("{0} param encountered within {1} tag which does not use this param.", key, tag.sTag);
}
break;
case "width":
{
if (atom is ImageElement || atom is BlockElement)
{
atom.Width = int.Parse(value);
}
else
{
Tracer.Warn("width param encountered within " + tag.sTag + " which does not use this param.");
}
}
break;
case "height":
{
if (atom is ImageElement || atom is BlockElement)
{
atom.Height = int.Parse(value);
}
else
{
Tracer.Warn("width param encountered within " + tag.sTag + " which does not use this param.");
}
}
break;
case "style":
ParseStyle(value);
break;
default:
Tracer.Warn(string.Format("Unknown parameter:{0}", key));
break;
}
}
}
public void InterpretHREF(HTMLchunk chunk, AElement atom)
{
if (chunk.bEndClosure)
{
// solo anchor elements are meaningless.
}
if (!chunk.bClosure)
{
// opening a hyperlink!
RecalculateStyle();
OpenTag tag = new OpenTag(chunk);
m_OpenTags.Add(tag);
ParseTag(tag, atom);
}
else
{
// closing a hyperlink.
RecalculateStyle();
}
}
public void AddAtom(AElement atom)
{
Children.Add(atom);
if (atom is BlockElement)
(atom as BlockElement).Parent = this;
}