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added support for XML processing instructions
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@marijnh
Dror BG authored and marijnh committed Aug 19, 2011
1 parent dfd44fb commit 7d36a0f
Showing 1 changed file with 68 additions and 22 deletions.
90 changes: 68 additions & 22 deletions mode/xmlpure/xmlpure.js
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Expand Up @@ -9,14 +9,14 @@
CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
// constants
var STYLE_ERROR = "error";
var STYLE_DECLARATION = "comment";
var STYLE_INSTRUCTION = "comment";
var STYLE_COMMENT = "comment";
var STYLE_ELEMENT_NAME = "tag";
var STYLE_ATTRIBUTE = "attribute";
var STYLE_WORD = "string";
var STYLE_TEXT = "atom";
var TAG_DECLARATION = "!declaration";

var TAG_INSTRUCTION = "!instruction";
var TAG_CDATA = "!cdata";
var TAG_COMMENT = "!comment";
var TAG_TEXT = "!text";
Expand All @@ -25,7 +25,7 @@ CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
"!cdata": true,
"!comment": true,
"!text": true,
"!declaration": true
"!instruction": true
};

// options
Expand Down Expand Up @@ -85,7 +85,7 @@ CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
// return true if the current token is seperated from the tokens before it
// which means either this is the start of the line, or there is at least
// one space or tab character behind the token
// other returns false
// otherwise returns false
function isTokenSeparated(stream) {
return stream.sol() ||
stream.string.charAt(stream.start - 1) == " " ||
Expand All @@ -102,16 +102,11 @@ CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
// - zero or more comments
function parseDocument(stream, state) {
if(stream.eat("<")) {
if(stream.match("?xml")) {
// declaration
if(state.lineNumber > 1 || stream.pos > 5) {
stream.skipToEnd();
return STYLE_ERROR;
} else {
pushContext(state, TAG_DECLARATION);
state.tokenize = parseDeclarationVersion;
return STYLE_DECLARATION;
}
if(stream.eat("?")) {
// processing instruction
pushContext(state, TAG_INSTRUCTION);
state.tokenize = parseProcessingInstructionStartTag;
return STYLE_INSTRUCTION;
} else if(stream.match("!--")) {
// new context: comment
pushContext(state, TAG_COMMENT);
Expand Down Expand Up @@ -273,7 +268,11 @@ CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
// - comments
function parseElementBlock(stream, state) {
if(stream.eat("<")) {
if(stream.match("!--")) {
if(stream.match("?")) {
pushContext(state, TAG_INSTRUCTION);
state.tokenize = parseProcessingInstructionStartTag;
return STYLE_INSTRUCTION;
} else if(stream.match("!--")) {
// new context: comment
pushContext(state, TAG_COMMENT);
return chain(stream, state, inBlock(STYLE_COMMENT, "-->",
Expand Down Expand Up @@ -313,6 +312,52 @@ CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
}
return STYLE_TEXT;
}

///////////////////////////////////////////////////////////////////////////
// context: XML processing instructions
//
// XML processing instructions (PIs) allow documents to contain instructions for applications.
// PI format: <?name data?>
// - 'name' can be anything other than 'xml' (case-insensitive)
// - 'data' can be anything which doesn't contain '?>'
// XML declaration is a special PI (see XML declaration context below)
function parseProcessingInstructionStartTag(stream, state) {
if(stream.match("xml", true, true)) {
// xml declaration
if(state.lineNumber > 1 || stream.pos > 5) {
state.tokenize = parseDocument;
stream.skipToEnd();
return STYLE_ERROR;
} else {
state.tokenize = parseDeclarationVersion;
return STYLE_INSTRUCTION;
}
}

// regular processing instruction
if(isTokenSeparated(stream) || stream.match("?>")) {
// we have a space after the start-tag, or nothing but the end-tag
// either way - error!
state.tokenize = parseDocument;
stream.skipToEnd();
return STYLE_ERROR;
}

state.tokenize = parseProcessingInstructionBody;
return STYLE_INSTRUCTION;
}

function parseProcessingInstructionBody(stream, state) {
stream.eatWhile(/[^?]/);
if(stream.eat("?")) {
if(stream.eat(">")) {
popContext(state);
state.tokenize = state.context == null ? parseDocument : parseElementBlock;
}
}
return STYLE_INSTRUCTION;
}


///////////////////////////////////////////////////////////////////////////
// context: XML declaration
Expand All @@ -325,11 +370,11 @@ CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
// - may include 'encoding' and 'standalone' (in that order after 'version')
// - attribute names must be lowercase
// - cannot contain anything else on the line

function parseDeclarationVersion(stream, state) {
state.tokenize = parseDeclarationEncoding;
state.tokenize = parseDeclarationEncoding;

if(isTokenSeparated(stream) && stream.match(/^version( )*=( )*"([a-zA-Z0-9_.:]|\-)+"/)) {
return STYLE_DECLARATION;
return STYLE_INSTRUCTION;
}
stream.skipToEnd();
return STYLE_ERROR;
Expand All @@ -339,7 +384,7 @@ CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
state.tokenize = parseDeclarationStandalone;

if(isTokenSeparated(stream) && stream.match(/^encoding( )*=( )*"[A-Za-z]([A-Za-z0-9._]|\-)*"/)) {
return STYLE_DECLARATION;
return STYLE_INSTRUCTION;
}
return null;
}
Expand All @@ -348,16 +393,17 @@ CodeMirror.defineMode("xmlpure", function(config, parserConfig) {
state.tokenize = parseDeclarationEndTag;

if(isTokenSeparated(stream) && stream.match(/^standalone( )*=( )*"(yes|no)"/)) {
return STYLE_DECLARATION;
return STYLE_INSTRUCTION;
}
return null;
}

function parseDeclarationEndTag(stream, state) {
state.tokenize = parseDocument;

if(stream.match("?>") && stream.eol()) {
popContext(state);
return STYLE_DECLARATION;
return STYLE_INSTRUCTION;
}
stream.skipToEnd();
return STYLE_ERROR;
Expand Down

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