private BlockNode parseYield() {
nextToken();
BlockNode block = (BlockNode) new BlockNode();
block.setLineNumber(lexer.getLineno());
block.setFileName(filename);
block.setYield(true);
return block;
}
private Node blockExpansion() {
if (peek() instanceof Colon) {
Token token = expect(Colon.class);
Colon colon = (Colon) token;
BlockNode block = new BlockNode();
block.setLineNumber(colon.getLineNumber());
block.setFileName(filename);
block.getNodes().add(parseExpr());
return block;
}
return block();
}
private Node parseBlock() {
Token token = expect(Block.class);
Block block = (Block) token;
String mode = block.getMode();
String name = block.getValue().trim();
Node blockNode;
if (peek() instanceof Indent) {
blockNode = block();
} else {
blockNode = new BlockNode();
blockNode.setLineNumber(block.getLineNumber());
blockNode.setFileName(filename);
}
((BlockNode) blockNode).setMode(mode);
if (blocks.containsKey(name)) {
BlockNode prev = (BlockNode) blocks.get(name);
if ("append".equals(prev.getMode())) {
blockNode.getNodes().addAll(prev.getNodes());
}
if ("prepend".equals(prev.getMode())) {
blockNode.getNodes().addAll(0, prev.getNodes());
}
if ("replace".equals(prev.getMode())) {
blockNode = prev;
}
}
blocks.put(name, blockNode);
return blockNode;
}
private Node block() {
BlockNode block = new BlockNode();
block.setLineNumber(lexer.getLineno());
block.setFileName(filename);
expect(Indent.class);
while (!(peek() instanceof Outdent) && !(peek() instanceof Eos)) {
if (peek() instanceof Newline) {
nextToken();
} else {
Node parseExpr = this.parseExpr();
if (parseExpr != null) {
block.push(parseExpr);
}
}
}
if (peek() instanceof Outdent) {
expect(Outdent.class);
}
return block;
}
public Node parse() {
BlockNode block = new BlockNode();
block.setLineNumber(lexer.getLineno());
block.setFileName(filename);
while (!(peek() instanceof Eos)) {
if (peek() instanceof Newline) {
nextToken();
} else {
Node expr = parseExpr();
if (expr != null) {
block.push(expr);
}
}
}
if (extending != null) {
getContexts().push(extending);
Node rootNode = extending.parse();
getContexts().pop();
return rootNode;
}
return block;
}
private Node parseInclude() {
Token token = expect(Include.class);
Include includeToken = (Include) token;
String templateName = includeToken.getValue().trim();
Parser parser = createParser(templateName);
parser.setBlocks(blocks);
contexts.push(parser);
Node ast = parser.parse();
contexts.pop();
if (peek() instanceof Indent && ast instanceof BlockNode) {
((BlockNode) ast).getIncludeBlock().push(block());
}
return ast;
}
private Node parseTag() {
// ast-filter look-ahead
int i = 2;
if (lookahead(i) instanceof Attribute) {
i++;
}
if (lookahead(i) instanceof Colon) {
i++;
if (lookahead(i) instanceof Indent) {
return this.parseASTFilter();
}
}
Token token = nextToken();
String name = token.getValue();
TagNode tagNode = new TagNode();
tagNode.setLineNumber(lexer.getLineno());
tagNode.setFileName(filename);
tagNode.setName(name);
tagNode.setValue(name);
while (true) {
Token incomingToken = peek();
if (incomingToken instanceof CssId) {
Token tok = nextToken();
tagNode.addAttribute("id", tok.getValue());
continue;
} else if (incomingToken instanceof CssClass) {
Token tok = nextToken();
tagNode.addAttribute("class", tok.getValue());
continue;
} else if (incomingToken instanceof Attribute) {
Attribute tok = (Attribute) nextToken();
tagNode.addAttributes(tok.getAttributes());
continue;
} else {
break;
}
}
// check immediate '.'
boolean dot = false;
if (peek() instanceof Dot) {
dot = true;
tagNode.setTextOnly(true);
nextToken();
}
// (text | code | ':')?
if (peek() instanceof Text) {
tagNode.setTextNode(parseText());
} else if (peek() instanceof Expression) {
tagNode.setCodeNode(parseCode());
} else if (peek() instanceof Colon) {
Token next = nextToken();
BlockNode block = new BlockNode();
block.setLineNumber(next.getLineNumber());
block.setFileName(filename);
tagNode.setBlock(block);
block.push(parseExpr());
}
// newline*
while (peek() instanceof Newline) {
nextToken();
}
if (!tagNode.isTextOnly()) {
if (Arrays.asList(textOnlyTags).contains(tagNode.getName())) {
tagNode.setTextOnly(true);
}
}
// script special-case
if ("script".equals(tagNode.getName())) {
String type = tagNode.getAttribute("type");
if (!dot && StringUtils.isNotBlank(type)) {
String cleanType = type.replaceAll("^['\"]|['\"]$", "");
if (!"text/javascript".equals(cleanType)) {
tagNode.setTextOnly(false);
}
}
}
if (peek() instanceof Indent) {
if (tagNode.isTextOnly()) {
lexer.setPipeless(true);
tagNode.setTextNode(parseTextBlock());
lexer.setPipeless(false);
} else {
Node blockNode = block();
if (tagNode.hasBlock()) {
tagNode.getBlock().getNodes().addAll(blockNode.getNodes());
} else {
tagNode.setBlock(blockNode);
}
}
}
return tagNode;
}