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tidy-html5/src/clean.c

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2011-11-17 02:44:16 +00:00
/*
clean.c -- clean up misuse of presentation markup
(c) 1998-2008 (W3C) MIT, ERCIM, Keio University
See tidy.h for the copyright notice.
Filters from other formats such as Microsoft Word
often make excessive use of presentation markup such
as font tags, B, I, and the align attribute. By applying
a set of production rules, it is straight forward to
transform this to use CSS.
Some rules replace some of the children of an element by
style properties on the element, e.g.
<p><b>...</b></p> -> <p style="font-weight: bold">...</p>
Such rules are applied to the element's content and then
to the element itself until none of the rules more apply.
Having applied all the rules to an element, it will have
a style attribute with one or more properties.
Other rules strip the element they apply to, replacing
it by style properties on the contents, e.g.
<dir><li><p>...</li></dir> -> <p style="margin-left 1em">...
These rules are applied to an element before processing
its content and replace the current element by the first
element in the exposed content.
After applying both sets of rules, you can replace the
style attribute by a class value and style rule in the
document head. To support this, an association of styles
and class names is built.
A naive approach is to rely on string matching to test
when two property lists are the same. A better approach
would be to first sort the properties before matching.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tidy-int.h"
#include "clean.h"
#include "lexer.h"
#include "parser.h"
#include "attrs.h"
#include "message.h"
#include "tmbstr.h"
#include "utf8.h"
static Node* CleanNode( TidyDocImpl* doc, Node *node );
static void RenameElem( TidyDocImpl* doc, Node* node, TidyTagId tid )
{
const Dict* dict = TY_(LookupTagDef)( tid );
TidyDocFree( doc, node->element );
node->element = TY_(tmbstrdup)( doc->allocator, dict->name );
node->tag = dict;
}
static void FreeStyleProps(TidyDocImpl* doc, StyleProp *props)
{
StyleProp *next;
while (props)
{
next = props->next;
TidyDocFree(doc, props->name);
TidyDocFree(doc, props->value);
TidyDocFree(doc, props);
props = next;
}
}
static StyleProp *InsertProperty( TidyDocImpl* doc, StyleProp* props, ctmbstr name, ctmbstr value )
{
StyleProp *first, *prev, *prop;
int cmp;
prev = NULL;
first = props;
while (props)
{
cmp = TY_(tmbstrcmp)(props->name, name);
if (cmp == 0)
{
/* this property is already defined, ignore new value */
return first;
}
if (cmp > 0)
{
/* insert before this */
prop = (StyleProp *)TidyDocAlloc(doc, sizeof(StyleProp));
prop->name = TY_(tmbstrdup)(doc->allocator, name);
prop->value = TY_(tmbstrdup)(doc->allocator, value);
prop->next = props;
if (prev)
prev->next = prop;
else
first = prop;
return first;
}
prev = props;
props = props->next;
}
prop = (StyleProp *)TidyDocAlloc(doc, sizeof(StyleProp));
prop->name = TY_(tmbstrdup)(doc->allocator, name);
prop->value = TY_(tmbstrdup)(doc->allocator, value);
prop->next = NULL;
if (prev)
prev->next = prop;
else
first = prop;
return first;
}
/*
Create sorted linked list of properties from style string
It temporarily places nulls in place of ':' and ';' to
delimit the strings for the property name and value.
Some systems don't allow you to NULL literal strings,
so to avoid this, a copy is made first.
*/
static StyleProp* CreateProps( TidyDocImpl* doc, StyleProp* prop, ctmbstr style )
{
tmbstr name, value = NULL, name_end, value_end, line;
Bool more;
line = TY_(tmbstrdup)(doc->allocator, style);
name = line;
while (*name)
{
while (*name == ' ')
++name;
name_end = name;
while (*name_end)
{
if (*name_end == ':')
{
value = name_end + 1;
break;
}
++name_end;
}
if (*name_end != ':')
break;
while ( value && *value == ' ')
++value;
value_end = value;
more = no;
while (*value_end)
{
if (*value_end == ';')
{
more = yes;
break;
}
++value_end;
}
*name_end = '\0';
*value_end = '\0';
prop = InsertProperty(doc, prop, name, value);
*name_end = ':';
if (more)
{
*value_end = ';';
name = value_end + 1;
continue;
}
break;
}
TidyDocFree(doc, line); /* free temporary copy */
return prop;
}
static tmbstr CreatePropString(TidyDocImpl* doc, StyleProp *props)
{
tmbstr style, p, s;
uint len;
StyleProp *prop;
/* compute length */
for (len = 0, prop = props; prop; prop = prop->next)
{
len += TY_(tmbstrlen)(prop->name) + 2;
if (prop->value)
len += TY_(tmbstrlen)(prop->value) + 2;
}
style = (tmbstr) TidyDocAlloc(doc, len+1);
style[0] = '\0';
for (p = style, prop = props; prop; prop = prop->next)
{
s = prop->name;
while((*p++ = *s++))
continue;
if (prop->value)
{
*--p = ':';
*++p = ' ';
++p;
s = prop->value;
while((*p++ = *s++))
continue;
}
if (prop->next == NULL)
break;
*--p = ';';
*++p = ' ';
++p;
}
return style;
}
/*
create string with merged properties
static tmbstr AddProperty( ctmbstr style, ctmbstr property )
{
tmbstr line;
StyleProp *prop;
prop = CreateProps(doc, NULL, style);
prop = CreateProps(doc, prop, property);
line = CreatePropString(doc, prop);
FreeStyleProps(doc, prop);
return line;
}
*/
void TY_(FreeStyles)( TidyDocImpl* doc )
{
Lexer* lexer = doc->lexer;
if ( lexer )
{
TagStyle *style, *next;
for ( style = lexer->styles; style; style = next )
{
next = style->next;
TidyDocFree( doc, style->tag );
TidyDocFree( doc, style->tag_class );
TidyDocFree( doc, style->properties );
TidyDocFree( doc, style );
}
}
}
static tmbstr GensymClass( TidyDocImpl* doc )
{
tmbchar buf[512]; /* CSSPrefix is limited to 256 characters */
ctmbstr pfx = cfgStr(doc, TidyCSSPrefix);
if ( pfx == NULL || *pfx == 0 )
pfx = "c";
TY_(tmbsnprintf)(buf, sizeof(buf), "%s%u", pfx, ++doc->nClassId );
return TY_(tmbstrdup)(doc->allocator, buf);
}
static ctmbstr FindStyle( TidyDocImpl* doc, ctmbstr tag, ctmbstr properties )
{
Lexer* lexer = doc->lexer;
TagStyle* style;
for (style = lexer->styles; style; style=style->next)
{
if (TY_(tmbstrcmp)(style->tag, tag) == 0 &&
TY_(tmbstrcmp)(style->properties, properties) == 0)
return style->tag_class;
}
style = (TagStyle *)TidyDocAlloc( doc, sizeof(TagStyle) );
style->tag = TY_(tmbstrdup)(doc->allocator, tag);
style->tag_class = GensymClass( doc );
style->properties = TY_(tmbstrdup)( doc->allocator, properties );
style->next = lexer->styles;
lexer->styles = style;
return style->tag_class;
}
/*
Add class="foo" to node
*/
static void AddClass( TidyDocImpl* doc, Node* node, ctmbstr classname )
{
AttVal *classattr = TY_(AttrGetById)(node, TidyAttr_CLASS);;
/*
if there already is a class attribute
then append class name after a space.
*/
if (classattr)
TY_(AppendToClassAttr)( doc, classattr, classname );
else /* create new class attribute */
TY_(AddAttribute)( doc, node, "class", classname );
}
void TY_(AddStyleAsClass)( TidyDocImpl* doc, Node *node, ctmbstr stylevalue )
{
ctmbstr classname;
classname = FindStyle( doc, node->element, stylevalue );
AddClass( doc, node, classname);
}
/*
Find style attribute in node, and replace it
by corresponding class attribute. Search for
class in style dictionary otherwise gensym
new class and add to dictionary.
Assumes that node doesn't have a class attribute
*/
static void Style2Rule( TidyDocImpl* doc, Node *node)
{
AttVal *styleattr, *classattr;
ctmbstr classname;
styleattr = TY_(AttrGetById)(node, TidyAttr_STYLE);
if (styleattr)
{
/* fix for http://tidy.sf.net/bug/850215 */
if (!styleattr->value)
{
TY_(RemoveAttribute)(doc, node, styleattr);
return;
}
classname = FindStyle( doc, node->element, styleattr->value );
classattr = TY_(AttrGetById)(node, TidyAttr_CLASS);
/*
if there already is a class attribute
then append class name after an underscore
*/
if (classattr)
{
TY_(AppendToClassAttr)( doc, classattr, classname );
TY_(RemoveAttribute)( doc, node, styleattr );
}
else /* reuse style attribute for class attribute */
{
TidyDocFree(doc, styleattr->attribute);
TidyDocFree(doc, styleattr->value);
styleattr->attribute = TY_(tmbstrdup)(doc->allocator, "class");
styleattr->value = TY_(tmbstrdup)(doc->allocator, classname);
}
}
}
static void AddColorRule( Lexer* lexer, ctmbstr selector, ctmbstr color )
{
if ( selector && color )
{
TY_(AddStringLiteral)(lexer, selector);
TY_(AddStringLiteral)(lexer, " { color: ");
TY_(AddStringLiteral)(lexer, color);
TY_(AddStringLiteral)(lexer, " }\n");
}
}
/*
move presentation attribs from body to style element
background="foo" -> body { background-image: url(foo) }
bgcolor="foo" -> body { background-color: foo }
text="foo" -> body { color: foo }
link="foo" -> :link { color: foo }
vlink="foo" -> :visited { color: foo }
alink="foo" -> :active { color: foo }
*/
static void CleanBodyAttrs( TidyDocImpl* doc, Node* body )
{
Lexer* lexer = doc->lexer;
tmbstr bgurl = NULL;
tmbstr bgcolor = NULL;
tmbstr color = NULL;
AttVal* attr;
if (NULL != (attr = TY_(AttrGetById)(body, TidyAttr_BACKGROUND)))
{
bgurl = attr->value;
attr->value = NULL;
TY_(RemoveAttribute)( doc, body, attr );
}
if (NULL != (attr = TY_(AttrGetById)(body, TidyAttr_BGCOLOR)))
{
bgcolor = attr->value;
attr->value = NULL;
TY_(RemoveAttribute)( doc, body, attr );
}
if (NULL != (attr = TY_(AttrGetById)(body, TidyAttr_TEXT)))
{
color = attr->value;
attr->value = NULL;
TY_(RemoveAttribute)( doc, body, attr );
}
if ( bgurl || bgcolor || color )
{
TY_(AddStringLiteral)(lexer, " body {\n");
if (bgurl)
{
TY_(AddStringLiteral)(lexer, " background-image: url(");
TY_(AddStringLiteral)(lexer, bgurl);
TY_(AddStringLiteral)(lexer, ");\n");
TidyDocFree(doc, bgurl);
}
if (bgcolor)
{
TY_(AddStringLiteral)(lexer, " background-color: ");
TY_(AddStringLiteral)(lexer, bgcolor);
TY_(AddStringLiteral)(lexer, ";\n");
TidyDocFree(doc, bgcolor);
}
if (color)
{
TY_(AddStringLiteral)(lexer, " color: ");
TY_(AddStringLiteral)(lexer, color);
TY_(AddStringLiteral)(lexer, ";\n");
TidyDocFree(doc, color);
}
TY_(AddStringLiteral)(lexer, " }\n");
}
if (NULL != (attr = TY_(AttrGetById)(body, TidyAttr_LINK)))
{
AddColorRule(lexer, " :link", attr->value);
TY_(RemoveAttribute)( doc, body, attr );
}
if (NULL != (attr = TY_(AttrGetById)(body, TidyAttr_VLINK)))
{
AddColorRule(lexer, " :visited", attr->value);
TY_(RemoveAttribute)( doc, body, attr );
}
if (NULL != (attr = TY_(AttrGetById)(body, TidyAttr_ALINK)))
{
AddColorRule(lexer, " :active", attr->value);
TY_(RemoveAttribute)( doc, body, attr );
}
}
static Bool NiceBody( TidyDocImpl* doc )
{
Node* node = TY_(FindBody)(doc);
if (node)
{
if (TY_(AttrGetById)(node, TidyAttr_BACKGROUND) ||
TY_(AttrGetById)(node, TidyAttr_BGCOLOR) ||
TY_(AttrGetById)(node, TidyAttr_TEXT) ||
TY_(AttrGetById)(node, TidyAttr_LINK) ||
TY_(AttrGetById)(node, TidyAttr_VLINK) ||
TY_(AttrGetById)(node, TidyAttr_ALINK))
{
doc->badLayout |= USING_BODY;
return no;
}
}
return yes;
}
/* create style element using rules from dictionary */
static void CreateStyleElement( TidyDocImpl* doc )
{
Lexer* lexer = doc->lexer;
Node *node, *head, *body;
TagStyle *style;
AttVal *av;
if ( lexer->styles == NULL && NiceBody(doc) )
return;
node = TY_(NewNode)( doc->allocator, lexer );
node->type = StartTag;
node->implicit = yes;
node->element = TY_(tmbstrdup)(doc->allocator, "style");
TY_(FindTag)( doc, node );
/* insert type attribute */
av = TY_(NewAttributeEx)( doc, "type", "text/css", '"' );
TY_(InsertAttributeAtStart)( node, av );
body = TY_(FindBody)( doc );
lexer->txtstart = lexer->lexsize;
if ( body )
CleanBodyAttrs( doc, body );
for (style = lexer->styles; style; style = style->next)
{
TY_(AddCharToLexer)(lexer, ' ');
TY_(AddStringLiteral)(lexer, style->tag);
TY_(AddCharToLexer)(lexer, '.');
TY_(AddStringLiteral)(lexer, style->tag_class);
TY_(AddCharToLexer)(lexer, ' ');
TY_(AddCharToLexer)(lexer, '{');
TY_(AddStringLiteral)(lexer, style->properties);
TY_(AddCharToLexer)(lexer, '}');
TY_(AddCharToLexer)(lexer, '\n');
}
lexer->txtend = lexer->lexsize;
TY_(InsertNodeAtEnd)( node, TY_(TextToken)(lexer) );
/*
now insert style element into document head
doc is root node. search its children for html node
the head node should be first child of html node
*/
if ( NULL != (head = TY_(FindHEAD)( doc )) )
TY_(InsertNodeAtEnd)( head, node );
}
/* ensure bidirectional links are consistent */
void TY_(FixNodeLinks)(Node *node)
{
Node *child;
if (node->prev)
node->prev->next = node;
else
node->parent->content = node;
if (node->next)
node->next->prev = node;
else
node->parent->last = node;
for (child = node->content; child; child = child->next)
child->parent = node;
}
/*
used to strip child of node when
the node has one and only one child
*/
static void StripOnlyChild(TidyDocImpl* doc, Node *node)
{
Node *child;
child = node->content;
node->content = child->content;
node->last = child->last;
child->content = NULL;
TY_(FreeNode)(doc, child);
for (child = node->content; child; child = child->next)
child->parent = node;
}
/*
used to strip font start and end tags.
Extricate "element", replace it by its content and delete it.
*/
static void DiscardContainer( TidyDocImpl* doc, Node *element, Node **pnode)
{
if (element->content)
{
Node *node, *parent = element->parent;
element->last->next = element->next;
if (element->next)
{
element->next->prev = element->last;
}
else
parent->last = element->last;
if (element->prev)
{
element->content->prev = element->prev;
element->prev->next = element->content;
}
else
parent->content = element->content;
for (node = element->content; node; node = node->next)
node->parent = parent;
*pnode = element->content;
element->next = element->content = NULL;
TY_(FreeNode)(doc, element);
}
else
{
*pnode = TY_(DiscardElement)(doc, element);
}
}
/*
Create new string that consists of the
combined style properties in s1 and s2
To merge property lists, we build a linked
list of property/values and insert properties
into the list in order, merging values for
the same property name.
*/
static tmbstr MergeProperties( TidyDocImpl* doc, ctmbstr s1, ctmbstr s2 )
{
tmbstr s;
StyleProp *prop;
prop = CreateProps(doc, NULL, s1);
prop = CreateProps(doc, prop, s2);
s = CreatePropString(doc, prop);
FreeStyleProps(doc, prop);
return s;
}
/*
Add style property to element, creating style
attribute as needed and adding ; delimiter
*/
void TY_(AddStyleProperty)(TidyDocImpl* doc, Node *node, ctmbstr property )
{
AttVal *av = TY_(AttrGetById)(node, TidyAttr_STYLE);
/* if style attribute already exists then insert property */
if ( av )
{
if (av->value != NULL)
{
tmbstr s = MergeProperties( doc, av->value, property );
TidyDocFree( doc, av->value );
av->value = s;
}
else
{
av->value = TY_(tmbstrdup)( doc->allocator, property );
}
}
else /* else create new style attribute */
{
av = TY_(NewAttributeEx)( doc, "style", property, '"' );
TY_(InsertAttributeAtStart)( node, av );
}
}
static void MergeClasses(TidyDocImpl* doc, Node *node, Node *child)
{
AttVal *av;
tmbstr s1, s2, names;
for (s2 = NULL, av = child->attributes; av; av = av->next)
{
if (attrIsCLASS(av))
{
s2 = av->value;
break;
}
}
for (s1 = NULL, av = node->attributes; av; av = av->next)
{
if (attrIsCLASS(av))
{
s1 = av->value;
break;
}
}
if (s1)
{
if (s2) /* merge class names from both */
{
uint l1, l2;
l1 = TY_(tmbstrlen)(s1);
l2 = TY_(tmbstrlen)(s2);
names = (tmbstr) TidyDocAlloc(doc, l1 + l2 + 2);
TY_(tmbstrcpy)(names, s1);
names[l1] = ' ';
TY_(tmbstrcpy)(names+l1+1, s2);
TidyDocFree(doc, av->value);
av->value = names;
}
}
else if (s2) /* copy class names from child */
{
av = TY_(NewAttributeEx)( doc, "class", s2, '"' );
TY_(InsertAttributeAtStart)( node, av );
}
}
static void MergeStyles(TidyDocImpl* doc, Node *node, Node *child)
{
AttVal *av;
tmbstr s1, s2, style;
/*
the child may have a class attribute used
for attaching styles, if so the class name
needs to be copied to node's class
*/
MergeClasses(doc, node, child);
for (s2 = NULL, av = child->attributes; av; av = av->next)
{
if (attrIsSTYLE(av))
{
s2 = av->value;
break;
}
}
for (s1 = NULL, av = node->attributes; av; av = av->next)
{
if (attrIsSTYLE(av))
{
s1 = av->value;
break;
}
}
if (s1)
{
if (s2) /* merge styles from both */
{
style = MergeProperties(doc, s1, s2);
TidyDocFree(doc, av->value);
av->value = style;
}
}
else if (s2) /* copy style of child */
{
av = TY_(NewAttributeEx)( doc, "style", s2, '"' );
TY_(InsertAttributeAtStart)( node, av );
}
}
static ctmbstr FontSize2Name(ctmbstr size)
{
static const ctmbstr sizes[7] =
{
"60%", "70%", "80%", NULL,
"120%", "150%", "200%"
};
/* increment of 0.8 */
static const ctmbstr minussizes[] =
{
"100%", "80%", "64%", "51%",
"40%", "32%", "26%"
};
/* increment of 1.2 */
static const ctmbstr plussizes[] =
{
"100%", "120%", "144%", "172%",
"207%", "248%", "298%"
};
if (size[0] == '\0')
return NULL;
if ('0' <= size[0] && size[0] <= '6')
{
int n = size[0] - '0';
return sizes[n];
}
if (size[0] == '-')
{
if ('0' <= size[1] && size[1] <= '6')
{
int n = size[1] - '0';
return minussizes[n];
}
return "smaller"; /*"70%"; */
}
if ('0' <= size[1] && size[1] <= '6')
{
int n = size[1] - '0';
return plussizes[n];
}
return "larger"; /* "140%" */
}
static void AddFontFace( TidyDocImpl* doc, Node *node, ctmbstr face )
{
tmbchar buf[256];
TY_(tmbsnprintf)(buf, sizeof(buf), "font-family: %s", face );
TY_(AddStyleProperty)( doc, node, buf );
}
static void AddFontSize( TidyDocImpl* doc, Node* node, ctmbstr size )
{
ctmbstr value = NULL;
if (nodeIsP(node))
{
if (TY_(tmbstrcmp)(size, "6") == 0)
value = "h1";
else if (TY_(tmbstrcmp)(size, "5") == 0)
value = "h2";
else if (TY_(tmbstrcmp)(size, "4") == 0)
value = "h3";
if (value)
{
TidyDocFree(doc, node->element);
node->element = TY_(tmbstrdup)(doc->allocator, value);
TY_(FindTag)(doc, node);
return;
}
}
value = FontSize2Name(size);
if (value)
{
tmbchar buf[64];
TY_(tmbsnprintf)(buf, sizeof(buf), "font-size: %s", value);
TY_(AddStyleProperty)( doc, node, buf );
}
}
static void AddFontColor( TidyDocImpl* doc, Node *node, ctmbstr color)
{
tmbchar buf[128];
TY_(tmbsnprintf)(buf, sizeof(buf), "color: %s", color);
TY_(AddStyleProperty)( doc, node, buf );
}
/* force alignment value to lower case */
static void AddAlign( TidyDocImpl* doc, Node *node, ctmbstr align )
{
uint i;
tmbchar buf[128];
TY_(tmbstrcpy)( buf, "text-align: " );
for ( i = 12; i < sizeof(buf)/sizeof(buf[0])-1; ++i )
{
if ( (buf[i] = (tmbchar)TY_(ToLower)(*align++)) == '\0' )
break;
}
buf[i] = '\0';
TY_(AddStyleProperty)( doc, node, buf );
}
/*
add style properties to node corresponding to
the font face, size and color attributes
*/
static void AddFontStyles( TidyDocImpl* doc, Node *node, AttVal *av)
{
while (av)
{
if (AttrHasValue(av))
{
if (attrIsFACE(av))
AddFontFace( doc, node, av->value );
else if (attrIsSIZE(av))
AddFontSize( doc, node, av->value );
else if (attrIsCOLOR(av))
AddFontColor( doc, node, av->value );
}
av = av->next;
}
}
/*
Symptom: <p align=center>
Action: <p style="text-align: center">
*/
static void TextAlign( TidyDocImpl* doc, Node* node )
{
AttVal *av, *prev;
prev = NULL;
for (av = node->attributes; av; av = av->next)
{
if (attrIsALIGN(av))
{
if (prev)
prev->next = av->next;
else
node->attributes = av->next;
if (av->value)
AddAlign( doc, node, av->value );
TY_(FreeAttribute)(doc, av);
break;
}
prev = av;
}
}
/*
Symptom: <table bgcolor="red">
Action: <table style="background-color: red">
*/
static void TableBgColor( TidyDocImpl* doc, Node* node )
{
AttVal* attr;
tmbchar buf[256];
if (NULL != (attr = TY_(AttrGetById)(node, TidyAttr_BGCOLOR)))
{
TY_(tmbsnprintf)(buf, sizeof(buf), "background-color: %s", attr->value );
TY_(RemoveAttribute)( doc, node, attr );
TY_(AddStyleProperty)( doc, node, buf );
}
}
/*
The clean up rules use the pnode argument to return the
next node when the original node has been deleted
*/
/*
Symptom: <dir> <li> where <li> is only child
Action: coerce <dir> <li> to <div> with indent.
*/
static Bool Dir2Div( TidyDocImpl* doc, Node *node, Node **ARG_UNUSED(pnode))
{
Node *child;
if ( nodeIsDIR(node) || nodeIsUL(node) || nodeIsOL(node) )
{
child = node->content;
if (child == NULL)
return no;
/* check child has no peers */
if (child->next)
return no;
if ( !nodeIsLI(child) )
return no;
if ( !child->implicit )
return no;
/* coerce dir to div */
node->tag = TY_(LookupTagDef)( TidyTag_DIV );
TidyDocFree( doc, node->element );
node->element = TY_(tmbstrdup)(doc->allocator, "div");
TY_(AddStyleProperty)( doc, node, "margin-left: 2em" );
StripOnlyChild( doc, node );
return yes;
}
return no;
}
/*
Symptom: <center>
Action: replace <center> by <div style="text-align: center">
*/
static Bool Center2Div( TidyDocImpl* doc, Node *node, Node **pnode)
{
if ( nodeIsCENTER(node) )
{
Remove what seems like a regression
2015-01-20 17:10:57 +00:00
#if 0 // 00000000 what is this doing inside an nodeIsCENTER(node)??? 0000000
new
2011-11-17 02:44:16 +00:00
if ( cfgBool(doc, TidyDropFontTags) )
{
if (node->content)
{
Node *last = node->last;
DiscardContainer( doc, node, pnode );
node = TY_(InferredTag)(doc, TidyTag_BR);
TY_(InsertNodeAfterElement)(last, node);
}
else
{
Node *prev = node->prev, *next = node->next,
*parent = node->parent;
DiscardContainer( doc, node, pnode );
node = TY_(InferredTag)(doc, TidyTag_BR);
if (next)
TY_(InsertNodeBeforeElement)(next, node);
else if (prev)
TY_(InsertNodeAfterElement)(prev, node);
else
TY_(InsertNodeAtStart)(parent, node);
}
return yes;
}
Remove what seems like a regression
2015-01-20 17:10:57 +00:00
#endif // 00000000 what is this doing inside an nodeIsCENTER(node)??? 0000000
new
2011-11-17 02:44:16 +00:00
RenameElem( doc, node, TidyTag_DIV );
TY_(AddStyleProperty)( doc, node, "text-align: center" );
return yes;
}
return no;
}
/* Copy child attributes to node. Duplicate attributes are overwritten.
Unique attributes (such as ID) disable the action.
Attributes style and class are not dealt with. A call to MergeStyles
will do that.
*/
static Bool CopyAttrs( TidyDocImpl* doc, Node *node, Node *child)
{
AttVal *av1, *av2;
TidyAttrId id;
/* Detect attributes that cannot be merged or overwritten. */
if (TY_(AttrGetById)(child, TidyAttr_ID) != NULL
&& TY_(AttrGetById)(node, TidyAttr_ID) != NULL)
return no;
/* Move child attributes to node. Attributes in node
can be overwritten or merged. */
for (av2 = child->attributes; av2; )
{
/* Dealt by MergeStyles. */
if (attrIsSTYLE(av2) || attrIsCLASS(av2))
{
av2 = av2->next;
continue;
}
/* Avoid duplicates in node */
if ((id=AttrId(av2)) != TidyAttr_UNKNOWN
&& (av1=TY_(AttrGetById)(node, id))!= NULL)
TY_(RemoveAttribute)( doc, node, av1 );
/* Move attribute from child to node */
TY_(DetachAttribute)( child, av2 );
av1 = av2;
av2 = av2->next;
av1->next = NULL;
TY_(InsertAttributeAtEnd)( node, av1 );
}
return yes;
}
/*
Symptom <XX><XX>...</XX></XX>
Action: merge the two XXs
For instance, this is useful after nested <dir>s used by Word
for indenting have been converted to <div>s
If state is "no", no merging.
If state is "yes", inner element is discarded. Only Style and Class
attributes are merged using MergeStyles().
If state is "auto", atttibutes are merged as described in CopyAttrs().
Style and Class attributes are merged using MergeStyles().
*/
static Bool MergeNestedElements( TidyDocImpl* doc,
TidyTagId Id, TidyTriState state, Node *node,
Node **ARG_UNUSED(pnode))
{
Node *child;
if ( state == TidyNoState
|| !TagIsId(node, Id) )
return no;
child = node->content;
if ( child == NULL
|| child->next != NULL
|| !TagIsId(child, Id) )
return no;
if ( state == TidyAutoState
&& CopyAttrs(doc, node, child) == no )
return no;
MergeStyles( doc, node, child );
StripOnlyChild( doc, node );
return yes;
}
/*
Symptom: <ul><li><ul>...</ul></li></ul>
Action: discard outer list
*/
static Bool NestedList( TidyDocImpl* doc, Node *node, Node **pnode )
{
Node *child, *list;
if ( nodeIsUL(node) || nodeIsOL(node) )
{
child = node->content;
if (child == NULL)
return no;
/* check child has no peers */
if (child->next)
return no;
list = child->content;
if (!list)
return no;
if (list->tag != node->tag)
return no;
/* check list has no peers */
if (list->next)
return no;
*pnode = list; /* Set node to resume iteration */
/* move inner list node into position of outer node */
list->prev = node->prev;
list->next = node->next;
list->parent = node->parent;
TY_(FixNodeLinks)(list);
/* get rid of outer ul and its li */
child->content = NULL;
TY_(FreeNode)( doc, child ); /* See test #427841. */
child = NULL;
node->content = NULL;
node->next = NULL;
TY_(FreeNode)( doc, node );
node = 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)
{
if ( (nodeIsUL(list->prev) || nodeIsOL(list->prev))
&& list->prev->last )
{
node = list;
list = node->prev;
child = list->last; /* <li> */
list->next = node->next;
TY_(FixNodeLinks)(list);
node->parent = child;
node->next = NULL;
node->prev = child->last;
TY_(FixNodeLinks)(node);
CleanNode( doc, node );
}
}
return yes;
}
return no;
}
/* Find CSS equivalent in a SPAN element */
static
Bool FindCSSSpanEq( Node *node, ctmbstr *s, Bool deprecatedOnly )
{
struct
{
TidyTagId id;
ctmbstr CSSeq;
Bool deprecated;
}
const CSS_SpanEq[] =
{
{ TidyTag_B, "font-weight: bold", no },
{ TidyTag_I, "font-style: italic", no },
{ TidyTag_S, "text-decoration: line-through", yes},
{ TidyTag_STRIKE, "text-decoration: line-through", yes},
{ TidyTag_U, "text-decoration: underline", yes},
{ TidyTag_UNKNOWN, NULL, no }
};
uint i;
for (i=0; CSS_SpanEq[i].CSSeq; ++i)
if ( (!deprecatedOnly || CSS_SpanEq[i].deprecated)
&& TagIsId(node, CSS_SpanEq[i].id) )
{
*s = CSS_SpanEq[i].CSSeq;
return yes;
}
return no;
}
/* Necessary conditions to apply BlockStyle(). */
static Bool CanApplyBlockStyle( Node *node )
{
if (TY_(nodeHasCM)(node,CM_BLOCK | CM_LIST | CM_DEFLIST | CM_TABLE)
Fixed #42.
2015-02-01 10:09:17 +00:00
&& !nodeIsDIV(node) && !nodeIsP(node)
new
2011-11-17 02:44:16 +00:00
&& !nodeIsTABLE(node) && !nodeIsTR(node) && !nodeIsLI(node) )
{
return yes;
}
return no;
}
/*
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
*/
static Bool BlockStyle( TidyDocImpl* doc, Node *node, Node **ARG_UNUSED(pnode) )
{
Node *child;
ctmbstr CSSeq;
/* check for bgcolor */
if ( nodeIsTABLE(node)
|| nodeIsTD(node) || nodeIsTH(node) || nodeIsTR( node ))
TableBgColor( doc, node );
if (CanApplyBlockStyle(node))
{
/* check for align attribute */
if ( !nodeIsCAPTION(node) )
TextAlign( doc, node );
child = node->content;
if (child == NULL)
return no;
/* check child has no peers */
if (child->next)
return no;
if ( FindCSSSpanEq(child, &CSSeq, no) )
{
MergeStyles( doc, node, child );
TY_(AddStyleProperty)( doc, node, CSSeq );
StripOnlyChild( doc, node );
return yes;
}
else if ( nodeIsFONT(child) )
{
MergeStyles( doc, node, child );
AddFontStyles( doc, node, child->attributes );
StripOnlyChild( doc, node );
return yes;
}
}
return no;
}
/* Necessary conditions to apply InlineStyle(). */
static Bool CanApplyInlineStyle( Node *node )
{
return !nodeIsFONT(node) && TY_(nodeHasCM)(node, CM_INLINE|CM_ROW);
}
/* the only child of table cell or an inline element such as em */
static Bool InlineStyle( TidyDocImpl* doc, Node *node, Node **ARG_UNUSED(pnode) )
{
Node *child;
ctmbstr CSSeq;
if ( CanApplyInlineStyle(node) )
{
child = node->content;
if (child == NULL)
return no;
/* check child has no peers */
if (child->next)
return no;
if ( FindCSSSpanEq(child, &CSSeq, no) )
{
MergeStyles( doc, node, child );
TY_(AddStyleProperty)( doc, node, CSSeq );
StripOnlyChild( doc, node );
return yes;
}
else if ( nodeIsFONT(child) )
{
MergeStyles( doc, node, child );
AddFontStyles( doc, node, child->attributes );
StripOnlyChild( doc, node );
return yes;
}
}
return no;
}
/*
Transform element to equivalent CSS
*/
static Bool InlineElementToCSS( TidyDocImpl* doc, Node* node,
Node **ARG_UNUSED(pnode) )
{
ctmbstr CSSeq;
/* if node is the only child of parent element then leave alone
Do so only if BlockStyle may be succesful. */
if ( node->parent->content == node && node->next == NULL &&
(CanApplyBlockStyle(node->parent)
|| CanApplyInlineStyle(node->parent)) )
return no;
if ( FindCSSSpanEq(node, &CSSeq, yes) )
{
RenameElem( doc, node, TidyTag_SPAN );
TY_(AddStyleProperty)( doc, node, CSSeq );
return yes;
}
return no;
}
/*
Replace font elements by span elements, deleting
the font element's attributes and replacing them
by a single style attribute.
*/
static Bool Font2Span( TidyDocImpl* doc, Node *node, Node **pnode )
{
AttVal *av, *style, *next;
if ( nodeIsFONT(node) )
{
if ( cfgBool(doc, TidyDropFontTags) )
{
DiscardContainer( doc, node, pnode );
return yes;
}
/* if node is the only child of parent element then leave alone
Do so only if BlockStyle may be succesful. */
if ( node->parent->content == node && node->next == NULL &&
CanApplyBlockStyle(node->parent) )
return no;
AddFontStyles( doc, node, node->attributes );
/* extract style attribute and free the rest */
av = node->attributes;
style = NULL;
while (av)
{
next = av->next;
if (attrIsSTYLE(av))
{
av->next = NULL;
style = av;
}
else
{
TY_(FreeAttribute)( doc, av );
}
av = next;
}
node->attributes = style;
RenameElem( doc, node, TidyTag_SPAN );
return yes;
}
return no;
}
/*
Applies all matching rules to a node.
*/
Node* CleanNode( TidyDocImpl* doc, Node *node )
{
Node *next = NULL;
TidyTriState mergeDivs = cfgAutoBool(doc, TidyMergeDivs);
TidyTriState mergeSpans = cfgAutoBool(doc, TidyMergeSpans);
for (next = node; TY_(nodeIsElement)(node); node = next)
{
if ( Dir2Div(doc, node, &next) )
continue;
/* Special case: true result means
** that arg node and its parent no longer exist.
** So we must jump back up the CreateStyleProperties()
** call stack until we have a valid node reference.
*/
if ( NestedList(doc, node, &next) )
return next;
if ( Center2Div(doc, node, &next) )
continue;
if ( MergeNestedElements(doc, TidyTag_DIV, mergeDivs, node, &next) )
continue;
if ( MergeNestedElements(doc, TidyTag_SPAN, mergeSpans, node, &next) )
continue;
if ( BlockStyle(doc, node, &next) )
continue;
if ( InlineStyle(doc, node, &next) )
continue;
if ( InlineElementToCSS(doc, node, &next) )
continue;
if ( Font2Span(doc, node, &next) )
continue;
break;
}
return next;
}
/* Special case: if the current node is destroyed by
** CleanNode() lower in the tree, this node and its parent
** no longer exist. So we must jump back up the CleanTree()
** call stack until we have a valid node reference.
*/
static Node* CleanTree( TidyDocImpl* doc, Node *node )
{
if (node->content)
{
Node *child;
for (child = node->content; child != NULL; child = child->next)
{
child = CleanTree( doc, child );
if ( !child )
break;
}
}
return CleanNode( doc, node );
}
static void DefineStyleRules( TidyDocImpl* doc, Node *node )
{
Node *child;
if (node->content)
{
for (child = node->content;
child != NULL; child = child->next)
{
DefineStyleRules( doc, child );
}
}
Style2Rule( doc, node );
}
void TY_(CleanDocument)( TidyDocImpl* doc )
{
/* placeholder. CleanTree()/CleanNode() will not
** zap root element
*/
CleanTree( doc, &doc->root );
if ( cfgBool(doc, TidyMakeClean) )
{
DefineStyleRules( doc, &doc->root );
CreateStyleElement( doc );
}
}
/* simplifies <b><b> ... </b> ...</b> etc. */
void TY_(NestedEmphasis)( TidyDocImpl* doc, Node* node )
{
Node *next;
while (node)
{
next = node->next;
if ( (nodeIsB(node) || nodeIsI(node))
&& node->parent && node->parent->tag == node->tag)
{
/* strip redundant inner element */
DiscardContainer( doc, node, &next );
node = next;
continue;
}
if ( node->content )
TY_(NestedEmphasis)( doc, node->content );
node = next;
}
}
/* replace i by em and b by strong */
void TY_(EmFromI)( TidyDocImpl* doc, Node* node )
{
while (node)
{
if ( nodeIsI(node) )
RenameElem( doc, node, TidyTag_EM );
else if ( nodeIsB(node) )
RenameElem( doc, node, TidyTag_STRONG );
if ( node->content )
TY_(EmFromI)( doc, node->content );
node = node->next;
}
}
static Bool HasOneChild(Node *node)
{
return (node->content && node->content->next == NULL);
}
/*
Some people use dir or ul without an li
to indent the content. The pattern to
look for is a list with a single implicit
li. This is recursively replaced by an
implicit blockquote.
*/
void TY_(List2BQ)( TidyDocImpl* doc, Node* node )
{
while (node)
{
if (node->content)
TY_(List2BQ)( doc, node->content );
if ( node->tag && node->tag->parser == TY_(ParseList) &&
HasOneChild(node) && node->content->implicit )
{
StripOnlyChild( doc, node );
RenameElem( doc, node, TidyTag_BLOCKQUOTE );
node->implicit = yes;
}
node = node->next;
}
}
/*
Replace implicit blockquote by div with an indent
taking care to reduce nested blockquotes to a single
div with the indent set to match the nesting depth
*/
void TY_(BQ2Div)( TidyDocImpl* doc, Node *node )
{
tmbchar indent_buf[ 32 ];
uint indent;
while (node)
{
if ( nodeIsBLOCKQUOTE(node) && node->implicit )
{
indent = 1;
while( HasOneChild(node) &&
nodeIsBLOCKQUOTE(node->content) &&
node->implicit)
{
++indent;
StripOnlyChild( doc, node );
}
if (node->content)
TY_(BQ2Div)( doc, node->content );
TY_(tmbsnprintf)(indent_buf, sizeof(indent_buf), "margin-left: %dem",
2*indent);
RenameElem( doc, node, TidyTag_DIV );
TY_(AddStyleProperty)(doc, node, indent_buf );
}
else if (node->content)
TY_(BQ2Div)( doc, node->content );
node = node->next;
}
}
static Node* FindEnclosingCell( TidyDocImpl* ARG_UNUSED(doc), Node *node)
{
Node *check;
for ( check=node; check; check = check->parent )
{
if ( nodeIsTD(check) )
return check;
}
return NULL;
}
/* node is <![if ...]> prune up to <![endif]> */
static Node* PruneSection( TidyDocImpl* doc, Node *node )
{
Lexer* lexer = doc->lexer;
for (;;)
{
ctmbstr lexbuf = lexer->lexbuf + node->start;
if ( TY_(tmbstrncmp)(lexbuf, "if !supportEmptyParas", 21) == 0 )
{
Node* cell = FindEnclosingCell( doc, node );
if ( cell )
{
/* Need to put &nbsp; into cell so it doesn't look weird
*/
Node* nbsp = TY_(NewLiteralTextNode)( lexer, "\240" );
assert( (byte)'\240' == (byte)160 );
TY_(InsertNodeBeforeElement)( node, nbsp );
}
}
/* discard node and returns next, unless it is a text node */
if ( node->type == TextNode )
node = node->next;
else
node = TY_(DiscardElement)( doc, node );
if (node == NULL)
return NULL;
if (node->type == SectionTag)
{
if (TY_(tmbstrncmp)(lexer->lexbuf + node->start, "if", 2) == 0)
{
node = PruneSection( doc, node );
continue;
}
if (TY_(tmbstrncmp)(lexer->lexbuf + node->start, "endif", 5) == 0)
{
node = TY_(DiscardElement)( doc, node );
break;
}
}
}
return node;
}
void TY_(DropSections)( TidyDocImpl* doc, Node* node )
{
Lexer* lexer = doc->lexer;
while (node)
{
if (node->type == SectionTag)
{
/* prune up to matching endif */
if ((TY_(tmbstrncmp)(lexer->lexbuf + node->start, "if", 2) == 0) &&
(TY_(tmbstrncmp)(lexer->lexbuf + node->start, "if !vml", 7) != 0)) /* #444394 - fix 13 Sep 01 */
{
node = PruneSection( doc, node );
continue;
}
/* discard others as well */
node = TY_(DiscardElement)( doc, node );
continue;
}
if (node->content)
TY_(DropSections)( doc, node->content );
node = node->next;
}
}
static void PurgeWord2000Attributes( TidyDocImpl* doc, Node* node )
{
AttVal *attr, *next, *prev = NULL;
for ( attr = node->attributes; attr; attr = next )
{
next = attr->next;
/* special check for class="Code" denoting pre text */
/* Pass thru user defined styles as HTML class names */
if (attrIsCLASS(attr))
{
if (AttrValueIs(attr, "Code") ||
TY_(tmbstrncmp)(attr->value, "Mso", 3) != 0 )
{
prev = attr;
continue;
}
}
if (attrIsCLASS(attr) ||
attrIsSTYLE(attr) ||
attrIsLANG(attr) ||
( (attrIsHEIGHT(attr) || attrIsWIDTH(attr)) &&
(nodeIsTD(node) || nodeIsTR(node) || nodeIsTH(node)) ) ||
(attr->attribute && TY_(tmbstrncmp)(attr->attribute, "x:", 2) == 0) )
{
if (prev)
prev->next = next;
else
node->attributes = next;
TY_(FreeAttribute)( doc, attr );
}
else
prev = attr;
}
}
/* Word2000 uses span excessively, so we strip span out */
static Node* StripSpan( TidyDocImpl* doc, Node* span )
{
Node *node, *prev = NULL, *content;
/*
deal with span elements that have content
by splicing the content in place of the span
after having processed it
*/
TY_(CleanWord2000)( doc, span->content );
content = span->content;
if (span->prev)
prev = span->prev;
else if (content)
{
node = content;
content = content->next;
TY_(RemoveNode)(node);
TY_(InsertNodeBeforeElement)(span, node);
prev = node;
}
while (content)
{
node = content;
content = content->next;
TY_(RemoveNode)(node);
TY_(InsertNodeAfterElement)(prev, node);
prev = node;
}
if (span->next == NULL)
span->parent->last = prev;
node = span->next;
span->content = NULL;
TY_(DiscardElement)( doc, span );
return node;
}
/* map non-breaking spaces to regular spaces */
void TY_(NormalizeSpaces)(Lexer *lexer, Node *node)
{
while ( node )
{
if ( node->content )
TY_(NormalizeSpaces)( lexer, node->content );
if (TY_(nodeIsText)(node))
{
uint i, c;
tmbstr p = lexer->lexbuf + node->start;
for (i = node->start; i < node->end; ++i)
{
c = (byte) lexer->lexbuf[i];
/* look for UTF-8 multibyte character */
if ( c > 0x7F )
i += TY_(GetUTF8)( lexer->lexbuf + i, &c );
if ( c == 160 )
c = ' ';
p = TY_(PutUTF8)(p, c);
}
node->end = p - lexer->lexbuf;
}
node = node->next;
}
}
/* used to hunt for hidden preformatted sections */
static Bool NoMargins(Node *node)
{
AttVal *attval = TY_(AttrGetById)(node, TidyAttr_STYLE);
if ( !AttrHasValue(attval) )
return no;
/* search for substring "margin-top: 0" */
if (!TY_(tmbsubstr)(attval->value, "margin-top: 0"))
return no;
/* search for substring "margin-bottom: 0" */
if (!TY_(tmbsubstr)(attval->value, "margin-bottom: 0"))
return no;
return yes;
}
/* does element have a single space as its content? */
static Bool SingleSpace( Lexer* lexer, Node* node )
{
if ( node->content )
{
node = node->content;
if ( node->next != NULL )
return no;
if ( node->type != TextNode )
return no;
if ( (node->end - node->start) == 1 &&
lexer->lexbuf[node->start] == ' ' )
return yes;
if ( (node->end - node->start) == 2 )
{
uint c = 0;
TY_(GetUTF8)( lexer->lexbuf + node->start, &c );
if ( c == 160 )
return yes;
}
}
return no;
}
/*
This is a major clean up to strip out all the extra stuff you get
when you save as web page from Word 2000. It doesn't yet know what
to do with VML tags, but these will appear as errors unless you
declare them as new tags, such as o:p which needs to be declared
as inline.
*/
void TY_(CleanWord2000)( TidyDocImpl* doc, Node *node)
{
/* used to a list from a sequence of bulletted p's */
Lexer* lexer = doc->lexer;
Node* list = NULL;
while ( node )
{
/* get rid of Word's xmlns attributes */
if ( nodeIsHTML(node) )
{
/* check that it's a Word 2000 document */
if ( !TY_(GetAttrByName)(node, "xmlns:o") &&
!cfgBool(doc, TidyMakeBare) )
return;
TY_(FreeAttrs)( doc, node );
}
/* fix up preformatted sections by looking for a
** sequence of paragraphs with zero top/bottom margin
*/
if ( nodeIsP(node) )
{
if (NoMargins(node))
{
Node *pre, *next;
TY_(CoerceNode)(doc, node, TidyTag_PRE, no, yes);
PurgeWord2000Attributes( doc, node );
if (node->content)
TY_(CleanWord2000)( doc, node->content );
pre = node;
node = node->next;
/* continue to strip p's */
while ( nodeIsP(node) && NoMargins(node) )
{
next = node->next;
TY_(RemoveNode)(node);
TY_(InsertNodeAtEnd)(pre, TY_(NewLineNode)(lexer));
TY_(InsertNodeAtEnd)(pre, node);
StripSpan( doc, node );
node = next;
}
if (node == NULL)
break;
}
}
if (node->tag && (node->tag->model & CM_BLOCK)
&& SingleSpace(lexer, node))
{
node = StripSpan( doc, node );
continue;
}
/* discard Word's style verbiage */
if ( nodeIsSTYLE(node) || nodeIsMETA(node) ||
node->type == CommentTag )
{
node = TY_(DiscardElement)( doc, node );
continue;
}
/* strip out all span and font tags Word scatters so liberally! */
if ( nodeIsSPAN(node) || nodeIsFONT(node) )
{
node = StripSpan( doc, node );
continue;
}
if ( nodeIsLINK(node) )
{
AttVal *attr = TY_(AttrGetById)(node, TidyAttr_REL);
if (AttrValueIs(attr, "File-List"))
{
node = TY_(DiscardElement)( doc, node );
continue;
}
}
/* discards <o:p> which encodes the paragraph mark */
if ( node->tag && TY_(tmbstrcmp)(node->tag->name,"o:p")==0)
{
Node* next;
DiscardContainer( doc, node, &next );
node = next;
continue;
}
/* discard empty paragraphs */
if ( node->content == NULL && nodeIsP(node) )
{
/* Use the existing function to ensure consistency */
Node *next = TY_(TrimEmptyElement)( doc, node );
node = next;
continue;
}
if ( nodeIsP(node) )
{
AttVal *attr, *atrStyle;
attr = TY_(AttrGetById)(node, TidyAttr_CLASS);
atrStyle = TY_(AttrGetById)(node, TidyAttr_STYLE);
/*
(JES) Sometimes Word marks a list item with the following hokie syntax
<p class="MsoNormal" style="...;mso-list:l1 level1 lfo1;
translate these into <li>
*/
/* map sequence of <p class="MsoListBullet"> to <ul>...</ul> */
/* map <p class="MsoListNumber"> to <ol>...</ol> */
if ( AttrValueIs(attr, "MsoListBullet") ||
AttrValueIs(attr, "MsoListNumber") ||
AttrContains(atrStyle, "mso-list:") )
{
TidyTagId listType = TidyTag_UL;
if (AttrValueIs(attr, "MsoListNumber"))
listType = TidyTag_OL;
TY_(CoerceNode)(doc, node, TidyTag_LI, no, yes);
if ( !list || TagId(list) != listType )
{
const Dict* tag = TY_(LookupTagDef)( listType );
list = TY_(InferredTag)(doc, tag->id);
TY_(InsertNodeBeforeElement)(node, list);
}
PurgeWord2000Attributes( doc, node );
if ( node->content )
TY_(CleanWord2000)( doc, node->content );
/* remove node and append to contents of list */
TY_(RemoveNode)(node);
TY_(InsertNodeAtEnd)(list, node);
node = list;
}
/* map sequence of <p class="Code"> to <pre>...</pre> */
else if (AttrValueIs(attr, "Code"))
{
Node *br = TY_(NewLineNode)(lexer);
TY_(NormalizeSpaces)(lexer, node->content);
if ( !list || TagId(list) != TidyTag_PRE )
{
list = TY_(InferredTag)(doc, TidyTag_PRE);
TY_(InsertNodeBeforeElement)(node, list);
}
/* remove node and append to contents of list */
TY_(RemoveNode)(node);
TY_(InsertNodeAtEnd)(list, node);
StripSpan( doc, node );
TY_(InsertNodeAtEnd)(list, br);
node = list->next;
}
else
list = NULL;
}
else
list = NULL;
if (!node)
return;
/* strip out style and class attributes */
if (TY_(nodeIsElement)(node))
PurgeWord2000Attributes( doc, node );
if (node->content)
TY_(CleanWord2000)( doc, node->content );
node = node->next;
}
}
Bool TY_(IsWord2000)( TidyDocImpl* doc )
{
AttVal *attval;
Node *node, *head;
Node *html = TY_(FindHTML)( doc );
if (html && TY_(GetAttrByName)(html, "xmlns:o"))
return yes;
/* search for <meta name="GENERATOR" content="Microsoft ..."> */
head = TY_(FindHEAD)( doc );
if (head)
{
for (node = head->content; node; node = node->next)
{
if ( !nodeIsMETA(node) )
continue;
attval = TY_(AttrGetById)( node, TidyAttr_NAME );
if ( !AttrValueIs(attval, "generator") )
continue;
attval = TY_(AttrGetById)( node, TidyAttr_CONTENT );
if ( AttrContains(attval, "Microsoft") )
return yes;
}
}
return no;
}
/* where appropriate move object elements from head to body */
void TY_(BumpObject)( TidyDocImpl* doc, Node *html )
{
Node *node, *next, *head = NULL, *body = NULL;
if (!html)
return;
for ( node = html->content; node != NULL; node = node->next )
{
if ( nodeIsHEAD(node) )
head = node;
if ( nodeIsBODY(node) )
body = node;
}
if ( head != NULL && body != NULL )
{
for (node = head->content; node != NULL; node = next)
{
next = node->next;
if ( nodeIsOBJECT(node) )
{
Node *child;
Bool bump = no;
for (child = node->content; child != NULL; child = child->next)
{
/* bump to body unless content is param */
if ( (TY_(nodeIsText)(child) && !TY_(IsBlank)(doc->lexer, node))
|| !nodeIsPARAM(child) )
{
bump = yes;
break;
}
}
if ( bump )
{
TY_(RemoveNode)( node );
TY_(InsertNodeAtStart)( body, node );
}
}
}
}
}
/* This is disabled due to http://tidy.sf.net/bug/681116 */
#if 0
void FixBrakes( TidyDocImpl* pDoc, Node *pParent )
{
Node *pNode;
Bool bBRDeleted = no;
if (NULL == pParent)
return;
/* First, check the status of All My Children */
pNode = pParent->content;
while (NULL != pNode )
{
/* The node may get trimmed, so save the next pointer, if any */
Node *pNext = pNode->next;
FixBrakes( pDoc, pNode );
pNode = pNext;
}
/* As long as my last child is a <br />, move it to my last peer */
if ( nodeCMIsBlock( pParent ))
{
for ( pNode = pParent->last;
NULL != pNode && nodeIsBR( pNode );
pNode = pParent->last )
{
if ( NULL == pNode->attributes && no == bBRDeleted )
{
TY_(DiscardElement)( pDoc, pNode );
bBRDeleted = yes;
}
else
{
TY_(RemoveNode)( pNode );
TY_(InsertNodeAfterElement)( pParent, pNode );
}
}
TY_(TrimEmptyElement)( pDoc, pParent );
}
}
#endif
void TY_(VerifyHTTPEquiv)(TidyDocImpl* doc, Node *head)
{
Node *pNode;
StyleProp *pFirstProp = NULL, *pLastProp = NULL, *prop = NULL;
tmbstr s, pszBegin, pszEnd;
ctmbstr enc = TY_(GetEncodingNameFromTidyId)(cfg(doc, TidyOutCharEncoding));
if (!enc)
return;
if (!nodeIsHEAD(head))
head = TY_(FindHEAD)(doc);
if (!head)
return;
/* Find any <meta http-equiv='Content-Type' content='...' /> */
for (pNode = head->content; NULL != pNode; pNode = pNode->next)
{
AttVal* httpEquiv = TY_(AttrGetById)(pNode, TidyAttr_HTTP_EQUIV);
AttVal* metaContent = TY_(AttrGetById)(pNode, TidyAttr_CONTENT);
if ( !nodeIsMETA(pNode) || !metaContent ||
!AttrValueIs(httpEquiv, "Content-Type") )
continue;
pszBegin = s = TY_(tmbstrdup)( doc->allocator, metaContent->value );
while (pszBegin && *pszBegin)
{
while (isspace( *pszBegin ))
pszBegin++;
pszEnd = pszBegin;
while ('\0' != *pszEnd && ';' != *pszEnd)
pszEnd++;
if (';' == *pszEnd )
*(pszEnd++) = '\0';
if (pszEnd > pszBegin)
{
prop = (StyleProp *)TidyDocAlloc(doc, sizeof(StyleProp));
prop->name = TY_(tmbstrdup)( doc->allocator, pszBegin );
prop->value = NULL;
prop->next = NULL;
if (NULL != pLastProp)
pLastProp->next = prop;
else
pFirstProp = prop;
pLastProp = prop;
pszBegin = pszEnd;
}
}
TidyDocFree( doc, s );
/* find the charset property */
for (prop = pFirstProp; NULL != prop; prop = prop->next)
{
if (0 != TY_(tmbstrncasecmp)( prop->name, "charset", 7 ))
continue;
TidyDocFree( doc, prop->name );
prop->name = (tmbstr)TidyDocAlloc( doc, 8 + TY_(tmbstrlen)(enc) + 1 );
TY_(tmbstrcpy)(prop->name, "charset=");
TY_(tmbstrcpy)(prop->name+8, enc);
s = CreatePropString( doc, pFirstProp );
TidyDocFree( doc, metaContent->value );
metaContent->value = s;
break;
}
/* #718127, prevent memory leakage */
FreeStyleProps(doc, pFirstProp);
pFirstProp = NULL;
pLastProp = NULL;
}
}
void TY_(DropComments)(TidyDocImpl* doc, Node* node)
{
Node* next;
while (node)
{
next = node->next;
if (node->type == CommentTag)
{
TY_(RemoveNode)(node);
TY_(FreeNode)(doc, node);
node = next;
continue;
}
if (node->content)
TY_(DropComments)(doc, node->content);
node = next;
}
}
void TY_(DropFontElements)(TidyDocImpl* doc, Node* node, Node **ARG_UNUSED(pnode))
{
Node* next;
while (node)
{
next = node->next;
if (nodeIsFONT(node))
{
DiscardContainer(doc, node, &next);
node = next;
continue;
}
if (node->content)
TY_(DropFontElements)(doc, node->content, &next);
node = next;
}
}
void TY_(WbrToSpace)(TidyDocImpl* doc, Node* node)
{
Node* next;
while (node)
{
next = node->next;
if (nodeIsWBR(node))
{
Node* text;
text = TY_(NewLiteralTextNode)(doc->lexer, " ");
TY_(InsertNodeAfterElement)(node, text);
TY_(RemoveNode)(node);
TY_(FreeNode)(doc, node);
node = next;
continue;
}
if (node->content)
TY_(WbrToSpace)(doc, node->content);
node = next;
}
}
/*
Filters from Word and PowerPoint often use smart
quotes resulting in character codes between 128
and 159. Unfortunately, the corresponding HTML 4.0
entities for these are not widely supported. The
following converts dashes and quotation marks to
the nearest ASCII equivalent. My thanks to
Andrzej Novosiolov for his help with this code.
Note: The old code in the pretty printer applied
this to all node types and attribute values while
this routine applies it only to text nodes. First,
Microsoft Office products rarely put the relevant
characters into these tokens, second support for
them is much better now and last but not least, it
can be harmful to replace these characters since
US-ASCII quote marks are often used as syntax
characters, a simple
<a onmouseover="alert('&#x2018;')">...</a>
would be broken if the U+2018 is replaced by "'".
The old code would neither take care whether the
quote mark is already used as delimiter,
<p title='&#x2018;'>...</p>
got
<p title='''>...</p>
Since browser support is much better nowadays and
high-quality typography is better than ASCII it'd
be probably a good idea to drop the feature...
*/
void TY_(DowngradeTypography)(TidyDocImpl* doc, Node* node)
{
Node* next;
Lexer* lexer = doc->lexer;
while (node)
{
next = node->next;
if (TY_(nodeIsText)(node))
{
uint i, c;
tmbstr p = lexer->lexbuf + node->start;
for (i = node->start; i < node->end; ++i)
{
c = (unsigned char) lexer->lexbuf[i];
if (c > 0x7F)
i += TY_(GetUTF8)(lexer->lexbuf + i, &c);
if (c >= 0x2013 && c <= 0x201E)
{
switch (c)
{
case 0x2013: /* en dash */
case 0x2014: /* em dash */
c = '-';
break;
case 0x2018: /* left single quotation mark */
case 0x2019: /* right single quotation mark */
case 0x201A: /* single low-9 quotation mark */
c = '\'';
break;
case 0x201C: /* left double quotation mark */
case 0x201D: /* right double quotation mark */
case 0x201E: /* double low-9 quotation mark */
c = '"';
break;
}
}
p = TY_(PutUTF8)(p, c);
}
node->end = p - lexer->lexbuf;
}
if (node->content)
TY_(DowngradeTypography)(doc, node->content);
node = next;
}
}
void TY_(ReplacePreformattedSpaces)(TidyDocImpl* doc, Node* node)
{
Node* next;
while (node)
{
next = node->next;
if (node->tag && node->tag->parser == TY_(ParsePre))
{
TY_(NormalizeSpaces)(doc->lexer, node->content);
node = next;
continue;
}
if (node->content)
TY_(ReplacePreformattedSpaces)(doc, node->content);
node = next;
}
}
void TY_(ConvertCDATANodes)(TidyDocImpl* doc, Node* node)
{
Node* next;
while (node)
{
next = node->next;
if (node->type == CDATATag)
node->type = TextNode;
if (node->content)
TY_(ConvertCDATANodes)(doc, node->content);
node = next;
}
}
/*
FixLanguageInformation ensures that the document contains (only)
the attributes for language information desired by the output
document type. For example, for XHTML 1.0 documents both
'xml:lang' and 'lang' are desired, for XHTML 1.1 only 'xml:lang'
is desired and for HTML 4.01 only 'lang' is desired.
*/
void TY_(FixLanguageInformation)(TidyDocImpl* doc, Node* node, Bool wantXmlLang, Bool wantLang)
{
Node* next;
while (node)
{
next = node->next;
/* todo: report modifications made here to the report system */
if (TY_(nodeIsElement)(node))
{
AttVal* lang = TY_(AttrGetById)(node, TidyAttr_LANG);
AttVal* xmlLang = TY_(AttrGetById)(node, TidyAttr_XML_LANG);
if (lang && xmlLang)
{
/*
todo: check whether both attributes are in sync,
here or elsewhere, where elsewhere is probably
preferable.
AD - March 2005: not mandatory according the standards.
*/
}
else if (lang && wantXmlLang)
{
if (TY_(NodeAttributeVersions)( node, TidyAttr_XML_LANG )
& doc->lexer->versionEmitted)
TY_(RepairAttrValue)(doc, node, "xml:lang", lang->value);
}
else if (xmlLang && wantLang)
{
if (TY_(NodeAttributeVersions)( node, TidyAttr_LANG )
& doc->lexer->versionEmitted)
TY_(RepairAttrValue)(doc, node, "lang", xmlLang->value);
}
if (lang && !wantLang)
TY_(RemoveAttribute)(doc, node, lang);
if (xmlLang && !wantXmlLang)
TY_(RemoveAttribute)(doc, node, xmlLang);
}
if (node->content)
TY_(FixLanguageInformation)(doc, node->content, wantXmlLang, wantLang);
node = next;
}
}
/*
Set/fix/remove <html xmlns='...'>
*/
void TY_(FixXhtmlNamespace)(TidyDocImpl* doc, Bool wantXmlns)
{
Node* html = TY_(FindHTML)(doc);
AttVal* xmlns;
if (!html)
return;
xmlns = TY_(AttrGetById)(html, TidyAttr_XMLNS);
if (wantXmlns)
{
if (!AttrValueIs(xmlns, XHTML_NAMESPACE))
TY_(RepairAttrValue)(doc, html, "xmlns", XHTML_NAMESPACE);
}
else if (xmlns)
{
TY_(RemoveAttribute)(doc, html, xmlns);
}
}
/*
...
*/
void TY_(FixAnchors)(TidyDocImpl* doc, Node *node, Bool wantName, Bool wantId)
{
Node* next;
while (node)
{
next = node->next;
if (TY_(IsAnchorElement)(doc, node))
{
AttVal *name = TY_(AttrGetById)(node, TidyAttr_NAME);
AttVal *id = TY_(AttrGetById)(node, TidyAttr_ID);
Bool hadName = name!=NULL;
Bool hadId = id!=NULL;
Bool IdEmitted = no;
Bool NameEmitted = no;
/* todo: how are empty name/id attributes handled? */
if (name && id)
{
Bool NameHasValue = AttrHasValue(name);
Bool IdHasValue = AttrHasValue(id);
if ( (NameHasValue != IdHasValue) ||
(NameHasValue && IdHasValue &&
TY_(tmbstrcmp)(name->value, id->value) != 0 ) )
TY_(ReportAttrError)( doc, node, name, ID_NAME_MISMATCH);
}
else if (name && wantId)
{
if (TY_(NodeAttributeVersions)( node, TidyAttr_ID )
& doc->lexer->versionEmitted)
{
if (TY_(IsValidHTMLID)(name->value))
{
TY_(RepairAttrValue)(doc, node, "id", name->value);
IdEmitted = yes;
}
else
TY_(ReportAttrError)(doc, node, name, INVALID_XML_ID);
}
}
else if (id && wantName)
{
if (TY_(NodeAttributeVersions)( node, TidyAttr_NAME )
& doc->lexer->versionEmitted)
{
/* todo: do not assume id is valid */
TY_(RepairAttrValue)(doc, node, "name", id->value);
NameEmitted = yes;
}
}
if (id && !wantId
/* make sure that Name has been emitted if requested */
Applied hash table optimisation to RemoveAnchorByNode. This function now takes the anchor name as a parameter, so it can look in the correct bin. In the case of FreeAttrs, we have the name already (since we found a name or id attribute). In the case of FixAnchors, the anchor name could come from either the name or id attribute, so we call the function separately for each case, passing the appropriate attribute value.
2012-08-20 03:06:30 +00:00
&& (hadName || !wantName || NameEmitted) ) {
if (!wantId && !wantName)
TY_(RemoveAnchorByNode)(doc, id->value, node);
new
2011-11-17 02:44:16 +00:00
TY_(RemoveAttribute)(doc, node, id);
Applied hash table optimisation to RemoveAnchorByNode. This function now takes the anchor name as a parameter, so it can look in the correct bin. In the case of FreeAttrs, we have the name already (since we found a name or id attribute). In the case of FixAnchors, the anchor name could come from either the name or id attribute, so we call the function separately for each case, passing the appropriate attribute value.
2012-08-20 03:06:30 +00:00
}
new
2011-11-17 02:44:16 +00:00
if (name && !wantName
/* make sure that Id has been emitted if requested */
Applied hash table optimisation to RemoveAnchorByNode. This function now takes the anchor name as a parameter, so it can look in the correct bin. In the case of FreeAttrs, we have the name already (since we found a name or id attribute). In the case of FixAnchors, the anchor name could come from either the name or id attribute, so we call the function separately for each case, passing the appropriate attribute value.
2012-08-20 03:06:30 +00:00
&& (hadId || !wantId || IdEmitted) ) {
if (!wantId && !wantName)
TY_(RemoveAnchorByNode)(doc, name->value, node);
new
2011-11-17 02:44:16 +00:00
TY_(RemoveAttribute)(doc, node, name);
Applied hash table optimisation to RemoveAnchorByNode. This function now takes the anchor name as a parameter, so it can look in the correct bin. In the case of FreeAttrs, we have the name already (since we found a name or id attribute). In the case of FixAnchors, the anchor name could come from either the name or id attribute, so we call the function separately for each case, passing the appropriate attribute value.
2012-08-20 03:06:30 +00:00
}
new
2011-11-17 02:44:16 +00:00
}
if (node->content)
TY_(FixAnchors)(doc, node->content, wantName, wantId);
node = next;
}
}
/*
* local variables:
* mode: c
* indent-tabs-mode: nil
* c-basic-offset: 4
* eval: (c-set-offset 'substatement-open 0)
* end:
*/
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