)
+ tagSetFrames = 11 // frame tags
+ tagSetImages = 12 // the ![]()
tag
+ tagSetPreformat = 13 // the tag and similar
+ tagSetNSCPInlineFormat = 14 // Netscape-specific inline formatting
+ tagSetNSCPLayers = 15 // Netscape layer tags
+ tagSetNSCPForms = 16 // Netscape form tags
+ tagSetNSCPBlockFormat = 17 // Netscape block-formatting tags
+ tagSetNSCPServer = 18 // the Netscape tag
+ tagSetMSFTDocFormat = 19 // Microsoft-specific document formatting
+ tagSetMSFTInlineFormat = 20 // Microsoft-specific inline formatting
+ tagSetMSFTBlockFormat = 21 // Microsoft-specific block formatting
+ tagSetMSFTActiveContent = 22 // Microsoft-specific active content
+ tagSetServerPage = 23 // server-side page use
+ tagSetJavaServer = 24 // Java server page use
+ tagSetComment = 25 // HTML comments
+)
+
+// Functions used inside the tag to implement "overridden" behavior.
type causeLineBreakFunc func(*tag, bool) bool
type closingTagFunc func(*tag) string
type rewriteContentsFunc func(*tag, string, bool, htmlCheckerBackend) string
+// tag is a structure describing a particular HTML tag.
type tag struct {
name string
index int
@@ -31,6 +64,7 @@ type tag struct {
rwc rewriteContentsFunc
}
+// causeLineBreak returns true if the tag causes a line break.
func (t *tag) causeLineBreak(isClosing bool) bool {
if t.clb == nil {
return t.lineBreak
@@ -38,6 +72,7 @@ func (t *tag) causeLineBreak(isClosing bool) bool {
return t.clb(t, isClosing)
}
+// makeClosingTag creates a closing tag for this one.
func (t *tag) makeClosingTag() string {
if t.ct == nil {
return ""
@@ -45,6 +80,7 @@ func (t *tag) makeClosingTag() string {
return t.ct(t)
}
+// rewriteContents is a hook used to rewrite the contents of the tag.
func (t *tag) rewriteContents(contents string, isClosing bool, ctxt htmlCheckerBackend) string {
if t.rwc == nil {
return contents
@@ -52,6 +88,7 @@ func (t *tag) rewriteContents(contents string, isClosing bool, ctxt htmlCheckerB
return t.rwc(t, contents, isClosing, ctxt)
}
+// createSimpleTag creates a structure for a simple tag.
func createSimpleTag(name string, brk bool) *tag {
return &tag{
name: strings.ToUpper(name),
@@ -65,6 +102,7 @@ func createSimpleTag(name string, brk bool) *tag {
}
}
+// createWBRTag creates a structure for a WBR (word break) tag.
func createWBRTag() *tag {
return &tag{
name: "WBR",
@@ -81,10 +119,12 @@ func createWBRTag() *tag {
}
}
+// stdClosingTag is the standard way a closing tag is made.
func stdClosingTag(tag *tag) string {
return fmt.Sprintf("", tag.name)
}
+// createOpenCloseTag creates a tag that has a specific open and close form.
func createOpenCloseTag(name string, brk bool) *tag {
return &tag{
name: strings.ToUpper(name),
@@ -98,6 +138,7 @@ func createOpenCloseTag(name string, brk bool) *tag {
}
}
+// createListElementTag creates a tag that is part of a list.
func createListElementTag(name string) *tag {
return &tag{
name: strings.ToUpper(name),
@@ -113,6 +154,7 @@ func createListElementTag(name string) *tag {
}
}
+// createBalancedTag creates a tag that should have opens and closes inherently balanced.
func createBalancedTag(name string, brk bool) *tag {
return &tag{
name: strings.ToUpper(name),
@@ -126,6 +168,7 @@ func createBalancedTag(name string, brk bool) *tag {
}
}
+// createNOBRTag creates a NOBR (no break) tag.
func createNOBRTag() *tag {
return &tag{
name: "NOBR",
@@ -146,11 +189,16 @@ func createNOBRTag() *tag {
}
}
+// Patterns to be used in recognizing attributes in an tag.
var hrefPattern = regexp.MustCompile(`(?i:href\s*=)`)
var targetPattern = regexp.MustCompile(`(?i:target\s*=)`)
+// extractAttribute extracts an attribute value from the contents of an tag.
func extractAttribute(s string) string {
s = strings.TrimSpace(s)
+ if len(s) == 0 {
+ return ""
+ }
if s[0] == '\'' || s[0] == '"' {
p := strings.IndexByte(s[1:], s[0])
if p < 0 {
@@ -161,6 +209,7 @@ func extractAttribute(s string) string {
return strings.Fields(s)[0]
}
+// rewriteATagContents rewrites the contents of an tag.
func rewriteATagContents(t *tag, contents string, isClosing bool, ctxt htmlCheckerBackend) string {
if isClosing {
return contents // don't bother checking close tag
@@ -191,6 +240,7 @@ func rewriteATagContents(t *tag, contents string, isClosing bool, ctxt htmlCheck
return contents + " " + tail
}
+// createATag creates an tag.
func createATag() *tag {
return &tag{
name: "A",
@@ -203,3 +253,164 @@ func createATag() *tag {
rwc: rewriteATagContents,
}
}
+
+// tagNameToIndex is a mapping from tag names to indexes into the arrays.
+var tagNameToIndex = make(map[string]int)
+
+// tagIndexToObject contains the actual tags.
+var tagIndexToObject = make([]*tag, 0, 50)
+
+// tagIndexToSetId contains the set ID values for each tag.
+var tagIndexToSetId = make([]int, 0, 50)
+
+// tagMaxLength is the maximum length of a tag name.
+var tagMaxLength = 0
+
+// tagSetNameToSet is the listing of bit sets corresponding to the set names in configuration.
+var tagSetNameToSet = make(map[string]*bitset.BitSet)
+
+// enshrineTag adds a tag to our internal repository structures.
+func enshrineTag(tag *tag, set int) {
+ ndx := len(tagIndexToObject)
+ tagIndexToObject = append(tagIndexToObject, tag)
+ tagIndexToSetId = append(tagIndexToSetId, set)
+ tag.index = ndx
+ tagNameToIndex[tag.name] = ndx
+ if len(tag.name) > tagMaxLength {
+ tagMaxLength = len(tag.name)
+ }
+}
+
+// init actually sets up the tag repository.
+func init() {
+ enshrineTag(createSimpleTag("!DOCTYPE", false), tagSetDocFormat)
+ enshrineTag(createSimpleTag("%", false), tagSetServerPage)
+ enshrineTag(createSimpleTag("%=", false), tagSetServerPage)
+ enshrineTag(createSimpleTag("%@", false), tagSetServerPage)
+ enshrineTag(createATag(), tagSetAnchor)
+ enshrineTag(createBalancedTag("ABBR", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("ACRONYM", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("ADDRESS", true), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("APPLET", false), tagSetActiveContent)
+ enshrineTag(createSimpleTag("AREA", false), tagSetImageMaps)
+ enshrineTag(createBalancedTag("B", false), tagSetInlineFormat)
+ enshrineTag(createSimpleTag("BASE", false), tagSetDocFormat)
+ enshrineTag(createSimpleTag("BASEFONT", false), tagSetDocFormat)
+ enshrineTag(createBalancedTag("BDO", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("BEAN", false), tagSetJavaServer)
+ enshrineTag(createSimpleTag("BGSOUND", false), tagSetMSFTDocFormat)
+ enshrineTag(createBalancedTag("BIG", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("BLINK", false), tagSetNSCPInlineFormat)
+ enshrineTag(createBalancedTag("BLOCKQUOTE", true), tagSetBlockFormat)
+ enshrineTag(createOpenCloseTag("BODY", false), tagSetDocFormat)
+ enshrineTag(createSimpleTag("BR", true), tagSetBlockFormat)
+ enshrineTag(createOpenCloseTag("BUTTON", false), tagSetForms)
+ enshrineTag(createBalancedTag("CAPTION", true), tagSetTables)
+ enshrineTag(createBalancedTag("CENTER", true), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("CITE", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("CODE", false), tagSetInlineFormat)
+ enshrineTag(createSimpleTag("COL", true), tagSetTables)
+ enshrineTag(createOpenCloseTag("COLGROUP", true), tagSetTables)
+ enshrineTag(createBalancedTag("COMMENT", false), tagSetMSFTInlineFormat)
+ enshrineTag(createListElementTag("DD"), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("DEL", false), tagSetChangeMarkup)
+ enshrineTag(createBalancedTag("DFN", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("DIR", true), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("DIV", true), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("DL", true), tagSetBlockFormat)
+ enshrineTag(createListElementTag("DT"), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("EM", false), tagSetInlineFormat)
+ enshrineTag(createSimpleTag("EMBED", false), tagSetActiveContent)
+ enshrineTag(createBalancedTag("FIELDSET", false), tagSetForms)
+ enshrineTag(createBalancedTag("FONT", false), tagSetFontFormat)
+ enshrineTag(createBalancedTag("FORM", false), tagSetForms)
+ enshrineTag(createSimpleTag("FRAME", true), tagSetFrames)
+ enshrineTag(createBalancedTag("FRAMESET", false), tagSetFrames)
+ enshrineTag(createBalancedTag("H1", true), tagSetFontFormat)
+ enshrineTag(createBalancedTag("H2", true), tagSetFontFormat)
+ enshrineTag(createBalancedTag("H3", true), tagSetFontFormat)
+ enshrineTag(createBalancedTag("H4", true), tagSetFontFormat)
+ enshrineTag(createBalancedTag("H5", true), tagSetFontFormat)
+ enshrineTag(createBalancedTag("H6", true), tagSetFontFormat)
+ enshrineTag(createOpenCloseTag("HEAD", false), tagSetDocFormat)
+ enshrineTag(createSimpleTag("HR", true), tagSetBlockFormat)
+ enshrineTag(createOpenCloseTag("HTML", false), tagSetDocFormat)
+ enshrineTag(createBalancedTag("I", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("IFRAME", true), tagSetFrames)
+ enshrineTag(createBalancedTag("ILAYER", true), tagSetNSCPLayers)
+ enshrineTag(createSimpleTag("IMG", false), tagSetImages)
+ enshrineTag(createSimpleTag("INPUT", false), tagSetForms)
+ enshrineTag(createBalancedTag("INS", false), tagSetChangeMarkup)
+ enshrineTag(createSimpleTag("ISINDEX", false), tagSetForms)
+ enshrineTag(createBalancedTag("KBD", false), tagSetInlineFormat)
+ enshrineTag(createSimpleTag("KEYGEN", false), tagSetNSCPForms)
+ enshrineTag(createBalancedTag("LABEL", false), tagSetForms)
+ enshrineTag(createBalancedTag("LAYER", true), tagSetNSCPLayers)
+ enshrineTag(createBalancedTag("LEGEND", false), tagSetForms)
+ enshrineTag(createListElementTag("LI"), tagSetBlockFormat)
+ enshrineTag(createSimpleTag("LINK", false), tagSetDocFormat)
+ enshrineTag(createBalancedTag("LISTING", false), tagSetMSFTInlineFormat)
+ enshrineTag(createBalancedTag("MAP", false), tagSetImageMaps)
+ enshrineTag(createBalancedTag("MARQUEE", true), tagSetMSFTBlockFormat)
+ enshrineTag(createBalancedTag("MENU", true), tagSetBlockFormat)
+ enshrineTag(createSimpleTag("META", false), tagSetDocFormat)
+ enshrineTag(createBalancedTag("MULTICOL", false), tagSetNSCPBlockFormat)
+ enshrineTag(createNOBRTag(), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("NOEMBED", false), tagSetActiveContent)
+ enshrineTag(createBalancedTag("NOFRAMES", false), tagSetFrames)
+ enshrineTag(createBalancedTag("NOLAYER", false), tagSetNSCPLayers)
+ enshrineTag(createBalancedTag("NOSCRIPT", false), tagSetActiveContent)
+ enshrineTag(createBalancedTag("OBJECT", false), tagSetActiveContent)
+ enshrineTag(createBalancedTag("OL", true), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("OPTGROUP", false), tagSetForms)
+ enshrineTag(createListElementTag("OPTION"), tagSetForms)
+ enshrineTag(createOpenCloseTag("P", true), tagSetBlockFormat)
+ enshrineTag(createSimpleTag("PARAM", false), tagSetActiveContent)
+ enshrineTag(createSimpleTag("PLAINTEXT", false), tagSetPreformat)
+ enshrineTag(createBalancedTag("PRE", false), tagSetPreformat)
+ enshrineTag(createBalancedTag("Q", false), tagSetInlineFormat)
+ enshrineTag(createSimpleTag("RT", false), tagSetMSFTActiveContent)
+ enshrineTag(createBalancedTag("RUBY", false), tagSetMSFTActiveContent)
+ enshrineTag(createBalancedTag("S", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("SAMP", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("SCRIPT", false), tagSetActiveContent)
+ enshrineTag(createBalancedTag("SELECT", false), tagSetForms)
+ enshrineTag(createBalancedTag("SERVER", false), tagSetNSCPServer)
+ enshrineTag(createBalancedTag("SERVLET", false), tagSetJavaServer)
+ enshrineTag(createBalancedTag("SMALL", false), tagSetInlineFormat)
+ enshrineTag(createSimpleTag("SPACER", false), tagSetNSCPInlineFormat)
+ enshrineTag(createBalancedTag("SPAN", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("STRIKE", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("STRONG", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("STYLE", false), tagSetDocFormat)
+ enshrineTag(createBalancedTag("SUB", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("SUP", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("TABLE", true), tagSetTables)
+ enshrineTag(createOpenCloseTag("TBODY", true), tagSetTables)
+ enshrineTag(createBalancedTag("TD", true), tagSetTables)
+ enshrineTag(createBalancedTag("TEXTAREA", true), tagSetForms)
+ enshrineTag(createOpenCloseTag("TFOOT", true), tagSetTables)
+ enshrineTag(createBalancedTag("TH", true), tagSetTables)
+ enshrineTag(createOpenCloseTag("THEAD", true), tagSetTables)
+ enshrineTag(createBalancedTag("TITLE", false), tagSetDocFormat)
+ enshrineTag(createBalancedTag("TR", true), tagSetTables)
+ enshrineTag(createBalancedTag("TT", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("U", false), tagSetInlineFormat)
+ enshrineTag(createBalancedTag("UL", true), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("VAR", false), tagSetInlineFormat)
+ enshrineTag(createWBRTag(), tagSetBlockFormat)
+ enshrineTag(createBalancedTag("XML", false), tagSetMSFTActiveContent)
+ enshrineTag(createBalancedTag("XMP", false), tagSetNSCPInlineFormat)
+
+ // Create the tag sets.
+ bs := bitset.New(tagSetComment + 1)
+ bs.Set(tagSetInlineFormat)
+ bs.Set(tagSetAnchor)
+ bs.Set(tagSetBlockFormat)
+ bs.Set(tagSetFontFormat)
+ bs.Set(tagSetImages)
+ tagSetNameToSet["normal"] = bs
+ bs = bitset.New(tagSetComment + 1)
+ bs.Set(tagSetInlineFormat)
+ tagSetNameToSet["restricted"] = bs
+}