/*
Applies all matching rules to a node.
*/
private Node CleanNode(Lexer lexer, Node node)
{
Node next = null;
MutableObject o = new MutableObject();
bool b = false;
for (next = node; node.IsElement; node = next)
{
o.Object = next;
b = Dir2Div(lexer, node, o);
next = (Node) o.Object;
if (b)
{
continue;
}
b = NestedList(lexer, node, o);
next = (Node) o.Object;
if (b)
{
continue;
}
b = Center2Div(lexer, node, o);
next = (Node) o.Object;
if (b)
{
continue;
}
b = MergeDivs(lexer, node, o);
next = (Node) o.Object;
if (b)
{
continue;
}
b = BlockStyle(lexer, node, o);
next = (Node) o.Object;
if (b)
{
continue;
}
b = InlineStyle(lexer, node, o);
next = (Node) o.Object;
if (b)
{
continue;
}
b = Font2Span(lexer, node, o);
next = (Node) o.Object;
if (b)
{
continue;
}
break;
}
return next;
}
/*
Symptom: the only child of a block-level element is a
presentation element such as B, I or FONT
Action: add style "font-weight: bold" to the block and
strip the <b> element, leaving its children.
example:
<p>
<b><font face="Arial" size="6">Draft Recommended Practice</font></b>
</p>
becomes:
<p style="font-weight: bold; font-family: Arial; font-size: 6">
Draft Recommended Practice
</p>
This code also replaces the align attribute by a style attribute.
However, to avoid CSS problems with Navigator 4, this isn't done
for the elements: caption, tr and table
*/
private bool BlockStyle(Lexer lexer, Node node, MutableObject pnode)
{
Node child;
if ((node.Tag.Model & (ContentModel.Block | ContentModel.List | ContentModel.Deflist | ContentModel.Table)) != 0)
{
if (node.Tag != _tt.tagTable && node.Tag != _tt.TagTr && node.Tag != _tt.TagLi)
{
/* check for align attribute */
if (node.Tag != _tt.TagCaption)
{
TextAlign(lexer, node);
}
child = node.Content;
if (child == null)
{
return false;
}
/* check child has no peers */
if (child.Next != null)
{
return false;
}
if (child.Tag == _tt.TagB)
{
MergeStyles(node, child);
AddStyleProperty(node, "font-weight: bold");
StripOnlyChild(node);
return true;
}
if (child.Tag == _tt.TagI)
{
MergeStyles(node, child);
AddStyleProperty(node, "font-style: italic");
StripOnlyChild(node);
return true;
}
if (child.Tag == _tt.TagFont)
{
MergeStyles(node, child);
AddFontStyles(node, child.Attributes);
StripOnlyChild(node);
return true;
}
}
}
return false;
}
/*
Symptom: <center>
Action: replace <center> by <div style="text-align: center">
*/
private bool Center2Div(Lexer lexer, Node node, MutableObject pnode)
{
if (node.Tag == _tt.TagCenter)
{
if (lexer.Options.DropFontTags)
{
if (node.Content != null)
{
Node last = node.Last;
Node parent = node.Parent;
DiscardContainer(node, pnode);
node = lexer.InferredTag("br");
if (last.Next != null)
{
last.Next.Prev = node;
}
node.Next = last.Next;
last.Next = node;
node.Prev = last;
if (parent.Last == last)
{
parent.Last = node;
}
node.Parent = parent;
}
else
{
Node prev = node.Prev;
Node next = node.Next;
Node parent = node.Parent;
DiscardContainer(node, pnode);
node = lexer.InferredTag("br");
node.Next = next;
node.Prev = prev;
node.Parent = parent;
if (next != null)
{
next.Prev = node;
}
else
{
parent.Last = node;
}
if (prev != null)
{
prev.Next = node;
}
else
{
parent.Content = node;
}
}
return true;
}
node.Tag = _tt.TagDiv;
node.Element = "div";
AddStyleProperty(node, "text-align: center");
return true;
}
return false;
}
/*
Symptom: <ul><li><ul>...</ul></li></ul>
Action: discard outer list
*/
private bool NestedList(Lexer lexer, Node node, MutableObject pnode)
{
Node child, list;
if (node.Tag == _tt.TagUl || node.Tag == _tt.TagOl)
{
child = node.Content;
if (child == null)
{
return false;
}
/* check child has no peers */
if (child.Next != null)
{
return false;
}
list = child.Content;
if (list == null)
{
return false;
}
if (list.Tag != node.Tag)
{
return false;
}
pnode.Object = node.Next;
/* move inner list node into position of outer node */
list.Prev = node.Prev;
list.Next = node.Next;
list.Parent = node.Parent;
FixNodeLinks(list);
/* get rid of outer ul and its li */
child.Content = null;
node.Content = null;
node.Next = null;
/*
If prev node was a list the chances are this node
should be appended to that list. Word has no way of
recognizing nested lists and just uses indents
*/
if (list.Prev != null)
{
node = list;
list = node.Prev;
if (list.Tag == _tt.TagUl || list.Tag == _tt.TagOl)
{
list.Next = node.Next;
if (list.Next != null)
{
list.Next.Prev = list;
}
child = list.Last; /* <li> */
node.Parent = child;
node.Next = null;
node.Prev = child.Last;
FixNodeLinks(node);
}
}
CleanNode(lexer, node);
return true;
}
return false;
}
/* simplifies <b><b> ... </b> ...</b> etc. */
public virtual void NestedEmphasis(Node node)
{
MutableObject o = new MutableObject();
Node next;
while (node != null)
{
next = node.Next;
if ((node.Tag == _tt.TagB || node.Tag == _tt.TagI) && node.Parent != null && node.Parent.Tag == node.Tag)
{
/* strip redundant inner element */
o.Object = next;
DiscardContainer(node, o);
next = (Node) o.Object;
node = next;
continue;
}
if (node.Content != null)
{
NestedEmphasis(node.Content);
}
node = next;
}
}
/* the only child of table cell or an inline element such as em */
private bool InlineStyle(Lexer lexer, Node node, MutableObject pnode)
{
Node child;
if (node.Tag != _tt.TagFont && (node.Tag.Model & (ContentModel.Inline | ContentModel.Row)) != 0)
{
child = node.Content;
if (child == null)
{
return false;
}
/* check child has no peers */
if (child.Next != null)
{
return false;
}
if (child.Tag == _tt.TagB && lexer.Options.LogicalEmphasis)
{
MergeStyles(node, child);
AddStyleProperty(node, "font-weight: bold");
StripOnlyChild(node);
return true;
}
if (child.Tag == _tt.TagI && lexer.Options.LogicalEmphasis)
{
MergeStyles(node, child);
AddStyleProperty(node, "font-style: italic");
StripOnlyChild(node);
return true;
}
if (child.Tag == _tt.TagFont)
{
MergeStyles(node, child);
AddFontStyles(node, child.Attributes);
StripOnlyChild(node);
return true;
}
}
return false;
}
/*
Symptom <div><div>...</div></div>
Action: merge the two divs
This is useful after nested <dir>s used by Word
for indenting have been converted to <div>s
*/
private bool MergeDivs(Lexer lexer, Node node, MutableObject pnode)
{
Node child;
if (node.Tag != _tt.TagDiv)
{
return false;
}
child = node.Content;
if (child == null)
{
return false;
}
if (child.Tag != _tt.TagDiv)
{
return false;
}
if (child.Next != null)
{
return false;
}
MergeStyles(node, child);
StripOnlyChild(node);
return true;
}
/*
Replace font elements by span elements, deleting
the font element's attributes and replacing them
by a single style attribute.
*/
private bool Font2Span(Lexer lexer, Node node, MutableObject pnode)
{
AttVal av, style, next;
if (node.Tag == _tt.TagFont)
{
if (lexer.Options.DropFontTags)
{
DiscardContainer(node, pnode);
return false;
}
/* if FONT is only child of parent element then leave alone */
if (node.Parent.Content == node && node.Next == null)
{
return false;
}
AddFontStyles(node, node.Attributes);
/* extract style attribute and free the rest */
av = node.Attributes;
style = null;
while (av != null)
{
next = av.Next;
if (av.Attribute.Equals("style"))
{
av.Next = null;
style = av;
}
av = next;
}
node.Attributes = style;
node.Tag = _tt.TagSpan;
node.Element = "span";
return true;
}
return false;
}
/* used to strip font start and end tags */
private void DiscardContainer(Node element, MutableObject pnode)
{
Node node;
Node parent = element.Parent;
if (element.Content != null)
{
element.Last.Next = element.Next;
if (element.Next != null)
{
element.Next.Prev = element.Last;
element.Last.Next = element.Next;
}
else
{
parent.Last = element.Last;
}
if (element.Prev != null)
{
element.Content.Prev = element.Prev;
element.Prev.Next = element.Content;
}
else
{
parent.Content = element.Content;
}
for (node = element.Content; node != null; node = node.Next)
{
node.Parent = parent;
}
pnode.Object = element.Content;
}
else
{
if (element.Next != null)
{
element.Next.Prev = element.Prev;
}
else
{
parent.Last = element.Prev;
}
if (element.Prev != null)
{
element.Prev.Next = element.Next;
}
else
{
parent.Content = element.Next;
}
pnode.Object = element.Next;
}
element.Next = null;
element.Content = null;
}
/*
The clean up rules use the pnode argument to return the
next node when the orignal node has been deleted
*/
/*
Symptom: <dir> <li> where <li> is only child
Action: coerce <dir> <li> to <div> with indent.
*/
private bool Dir2Div(Lexer lexer, Node node, MutableObject pnode)
{
Node child;
if (node.Tag == _tt.TagDir || node.Tag == _tt.TagUl || node.Tag == _tt.TagOl)
{
child = node.Content;
if (child == null)
{
return false;
}
/* check child has no peers */
if (child.Next != null)
{
return false;
}
if (child.Tag != _tt.TagLi)
{
return false;
}
if (!child.Isimplicit)
{
return false;
}
/* coerce dir to div */
node.Tag = _tt.TagDiv;
node.Element = "div";
AddStyleProperty(node, "margin-left: 2em");
StripOnlyChild(node);
return true;
}
return false;
}
/* swallows closing '>' */
public virtual AttVal ParseAttrs(MutableBoolean isempty)
{
AttVal av, list;
string attribute, val;
MutableInteger delim = new MutableInteger();
MutableObject asp = new MutableObject();
MutableObject php = new MutableObject();
list = null;
while (!EndOfInput())
{
attribute = ParseAttribute(isempty, asp, php);
if (attribute == null)
{
/* check if attributes are created by ASP markup */
if (asp.Object != null)
{
av = new AttVal(list, null, (Node) asp.Object, null, '\x0000', null, null);
list = av;
continue;
}
/* check if attributes are created by PHP markup */
if (php.Object != null)
{
av = new AttVal(list, null, null, (Node) php.Object, '\x0000', null, null);
list = av;
continue;
}
break;
}
val = ParseValue(attribute, false, isempty, delim);
if (attribute != null && IsValidAttrName(attribute))
{
av = new AttVal(list, null, null, null, delim.Val, attribute, val);
av.Dict = AttributeTable.DefaultAttributeTable.FindAttribute(av);
list = av;
}
else
{
av = new AttVal(null, null, null, null, 0, attribute, val);
Report.AttrError(this, token, val, Report.BAD_ATTRIBUTE_VALUE);
}
}
return list;
}
/* consumes the '>' terminating start tags */
public virtual string ParseAttribute(MutableBoolean isempty, MutableObject asp, MutableObject php)
{
int start = 0;
// int len = 0; Removed by BUGFIX for 126265
short map;
string attr;
int c = 0;
asp.Object = null; /* clear asp pointer */
php.Object = null; /* clear php pointer */
/* skip white space before the attribute */
for (;;)
{
c = input.ReadChar();
if (c == '/')
{
c = input.ReadChar();
if (c == '>')
{
isempty.Val = true;
return null;
}
input.UngetChar(c);
c = '/';
break;
}
if (c == '>')
{
return null;
}
if (c == '<')
{
c = input.ReadChar();
if (c == '%')
{
asp.Object = ParseAsp();
return null;
}
else if (c == '?')
{
php.Object = ParsePhp();
return null;
}
input.UngetChar(c);
Report.AttrError(this, token, null, Report.UNEXPECTED_GT);
return null;
}
if (c == '"' || c == '\'')
{
Report.AttrError(this, token, null, Report.UNEXPECTED_QUOTEMARK);
continue;
}
if (c == StreamIn.EndOfStream)
{
Report.AttrError(this, token, null, Report.UNEXPECTED_END_OF_FILE);
input.UngetChar(c);
return null;
}
map = MAP((char) c);
if ((map & WHITE) == 0)
{
break;
}
}
start = lexsize;
for (;;)
{
/* but push back '=' for parseValue() */
if (c == '=' || c == '>')
{
input.UngetChar(c);
break;
}
if (c == '<' || c == StreamIn.EndOfStream)
{
input.UngetChar(c);
break;
}
map = MAP((char) c);
if ((map & WHITE) != 0)
break;
/* what should be done about non-namechar characters? */
/* currently these are incorporated into the attr name */
if (!Options.XmlTags && (map & UPPERCASE) != 0)
{
c += (int) ('a' - 'A');
}
// ++len; Removed by BUGFIX for 126265
AddCharToLexer(c);
c = input.ReadChar();
}
// Following line added by GLP to fix BUG 126265. This is a temporary comment
// and should be removed when Tidy is fixed.
int len = lexsize - start;
attr = (len > 0?GetString(lexbuf, start, len):null);
lexsize = start;
return attr;
}
