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Fixes DTD completion
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Fixes #232

Signed-off-by: Nikolas Komonen <nikolaskomonen@gmail.com>
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@NikolasKomonen
NikolasKomonen committed Jan 18, 2019
1 parent 0892ea5 commit a563d6d
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Showing 4 changed files with 159 additions and 43 deletions.
43 changes: 43 additions & 0 deletions org.eclipse.lsp4xml/src/main/java/org/eclipse/lsp4xml/dom/DOMDocument.java
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@
import org.eclipse.lsp4xml.uriresolver.URIResolverExtensionManager;
import org.eclipse.lsp4xml.utils.DOMUtils;
import org.eclipse.lsp4xml.utils.StringUtils;
import org.eclipse.lsp4xml.utils.XMLPositionUtility;
import org.w3c.dom.CDATASection;
import org.w3c.dom.DOMConfiguration;
import org.w3c.dom.DOMException;
Expand Down Expand Up @@ -760,6 +761,48 @@ public boolean isDTD() {
return false;
}

/**
* Returns true if 'offset' is within an internal DOCTYPE dtd.
* Else false.
* @param offset
* @return
*/
public boolean isWithinInternalDTD(int offset) {
DOMDocumentType doctype = this.getDoctype();
if(doctype != null && doctype.internalSubset != null) {
return offset > doctype.internalSubset.start && offset < doctype.internalSubset.end;
}
return false;
}

public Range getTrimmedRange(Range range) {
if(range != null) {
return getTrimmedRange(range.getStart().getCharacter(), range.getEnd().getCharacter());
}
return null;

}

public Range getTrimmedRange(int start, int end) {
String text = getText();
char c = text.charAt(start);
while(Character.isWhitespace(c)) {
start++;
c = text.charAt(start);
}
if(start == end) {
return null;
}
end--;
c = text.charAt(end);
while(Character.isWhitespace(c)) {
end--;
c = text.charAt(end);
}
end++;
return XMLPositionUtility.createRange(start, end, this);
}

/**
* Returns the DTD Attribute list for the given element name and empty
* otherwise.
Expand Down
22 changes: 15 additions & 7 deletions org.eclipse.lsp4xml/src/main/java/org/eclipse/lsp4xml/dom/parser/XMLScanner.java
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Original file line number Diff line number Diff line change
Expand Up @@ -446,9 +446,9 @@ TokenType internalScan() {
isInsideDTDContent = false;
return finishToken(offset, TokenType.DTDEndInternalSubset);
}

boolean startsWithLessThanBracket = false;
if (stream.advanceIfChar(_LAN)) { // <

startsWithLessThanBracket = true;
if (!stream.eos() && stream.peekChar() == _EXL) { // !
isDeclCompleted = false;
if (stream.advanceIfChars(_EXL, _EVL, _LVL, _EVL, _MVL, _EVL, _NVL, _TVL)) { // !ELEMENT
Expand All @@ -469,15 +469,23 @@ TokenType internalScan() {
return finishToken(offset, TokenType.StartCommentTag);
}
}
if (stream.advanceUntilCharOrNewTag(_RAN)) { // >
stream.advanceIfChar(_RAN); // >
return finishToken(offset, TokenType.Content);
}
}
if(isDTDFile) {
stream.advanceUntilChar(_LAN); // <
if(startsWithLessThanBracket) {
if(stream.advanceUntilCharOrNewTag(_RAN)){ // >
if(stream.peekChar() == _RAN) {
stream.advance(1); //consume '>'
}
}
}
else {
stream.advanceUntilAnyOfChars(_LAN); // <
}
} else {
stream.advanceUntilAnyOfChars(_RAN, _LAN, _CSB); // > || < || ]
if(startsWithLessThanBracket && stream.peekChar() == _RAN) {
stream.advance(1); //consume '>'
}
}
return finishToken(offset, TokenType.Content);

Expand Down
92 changes: 57 additions & 35 deletions org.eclipse.lsp4xml/src/main/java/org/eclipse/lsp4xml/services/XMLCompletions.java
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Original file line number Diff line number Diff line change
Expand Up @@ -201,6 +201,13 @@ public CompletionList doComplete(DOMDocument xmlDocument, Position position, Com
}
break;
case Content:
if(completionRequest.getXMLDocument().isDTD() || completionRequest.getXMLDocument().isWithinInternalDTD(offset)) {
if (scanner.getTokenOffset() <= offset) {
collectInsideDTDContent(completionRequest, completionResponse, true);
return completionResponse;
}
break;
}
if (offset <= scanner.getTokenEnd()) {
collectInsideContent(completionRequest, completionResponse);
return completionResponse;
Expand Down Expand Up @@ -248,6 +255,12 @@ public CompletionList doComplete(DOMDocument xmlDocument, Position position, Com
break;
}
// DTD
case DTDAttlistAttributeName:
case DTDAttlistAttributeType:
case DTDAttlistAttributeValue:
case DTDStartAttlist:
case DTDStartElement:
case DTDStartEntity:
case DTDEndTag:
case DTDStartInternalSubset:
case DTDEndInternalSubset: {
Expand Down Expand Up @@ -691,74 +704,83 @@ private void collectAttributeValueSuggestions(int valueStart, int valueEnd, Comp
}

private void collectInsideDTDContent(CompletionRequest request, CompletionResponse response) {
collectInsideDTDContent(request,response, false);
}
private void collectInsideDTDContent(CompletionRequest request, CompletionResponse response, boolean isContent) {
// Insert DTD Element Declaration
// see https://www.w3.org/TR/REC-xml/#dt-eldecl
InsertTextFormat insertFormat = request.getCompletionSettings().isCompletionSnippetsSupported() ? InsertTextFormat.Snippet : InsertTextFormat.PlainText;
CompletionItem elementDecl = new CompletionItem();
elementDecl.setLabel("Insert DTD Element declaration");
elementDecl.setKind(CompletionItemKind.EnumMember);
elementDecl.setFilterText("<!ELEMENT");
elementDecl.setInsertTextFormat(InsertTextFormat.Snippet);
elementDecl.setFilterText("<!ELEMENT ");
elementDecl.setInsertTextFormat(insertFormat);
int startOffset = request.getOffset();
Range editRange = null;
DOMDocument document = request.getXMLDocument();
DOMNode node = document.findNodeAt(startOffset);
try {
Range editRange = getReplaceRange(startOffset, startOffset, request);
elementDecl.setTextEdit(new TextEdit(editRange, "<!ELEMENT ${0:element-name} (${1:#PCDATA})>"));
elementDecl.setDocumentation("<!ELEMENT element-name (#PCDATA)>");
if(node.isDoctype()) {
editRange = getReplaceRange(startOffset, startOffset, request);
} else {
if(isContent) {
editRange = document.getTrimmedRange(node.getStart(), node.getEnd());
}
if(editRange == null) {
editRange = getReplaceRange(node.getStart(), node.getEnd(), request);
}
}
} catch (BadLocationException e) {
LOGGER.log(Level.SEVERE, "While performing getReplaceRange for DTD !ELEMENT completion.", e);
LOGGER.log(Level.SEVERE, "While performing getReplaceRange for DTD completion.", e);
}

elementDecl.setTextEdit(new TextEdit(editRange, "<!ELEMENT ${1:element-name} (${0:#PCDATA})>"));
elementDecl.setDocumentation("<!ELEMENT element-name (#PCDATA)>");

response.addCompletionItem(elementDecl);

// Insert DTD AttrList Declaration
// see https://www.w3.org/TR/REC-xml/#attdecls
CompletionItem attrListDecl = new CompletionItem();
attrListDecl.setLabel("Insert DTD Attributes list declaration");
attrListDecl.setKind(CompletionItemKind.EnumMember);
attrListDecl.setFilterText("<!ATTLIST");
attrListDecl.setInsertTextFormat(InsertTextFormat.Snippet);
attrListDecl.setFilterText("<!ATTLIST ");
attrListDecl.setInsertTextFormat(insertFormat);
startOffset = request.getOffset();
try {
Range editRange = getReplaceRange(startOffset, startOffset, request);
attrListDecl.setTextEdit(new TextEdit(editRange,
"<!ATTLIST ${0:element-name} ${1:attribute-name} ${2:ID} ${3:#REQUIRED} >"));
attrListDecl.setDocumentation("<!ATTLIST element-name attribute-name ID #REQUIRED >");
} catch (BadLocationException e) {
LOGGER.log(Level.SEVERE, "While performing getReplaceRange for DTD !ATTLIST completion.", e);
}

attrListDecl.setTextEdit(new TextEdit(editRange,
"<!ATTLIST ${1:element-name} ${2:attribute-name} ${3:ID} ${0:#REQUIRED}>"));
attrListDecl.setDocumentation("<!ATTLIST element-name attribute-name ID #REQUIRED>");

response.addCompletionItem(attrListDecl);

// Insert Internal DTD Entity Declaration
// see https://www.w3.org/TR/REC-xml/#dt-entdecl
CompletionItem internalEntity = new CompletionItem();
internalEntity.setLabel("Insert Internal DTD Entity declaration");
internalEntity.setKind(CompletionItemKind.EnumMember);
internalEntity.setFilterText("<!ENTITY");
internalEntity.setInsertTextFormat(InsertTextFormat.Snippet);
internalEntity.setFilterText("<!ENTITY ");
internalEntity.setInsertTextFormat(insertFormat);
startOffset = request.getOffset();
try {
Range editRange = getReplaceRange(startOffset, startOffset, request);
internalEntity.setTextEdit(new TextEdit(editRange, "<!ENTITY ${0:entity-name} \"${1:entity-value}\" >"));
internalEntity.setDocumentation("<!ENTITY entity-name \"entity-value\" >");
} catch (BadLocationException e) {
LOGGER.log(Level.SEVERE, "While performing getReplaceRange for DTD !ENTITY completion.", e);
}

internalEntity.setTextEdit(new TextEdit(editRange, "<!ENTITY ${1:entity-name} \"${0:entity-value}\">"));
internalEntity.setDocumentation("<!ENTITY entity-name \"entity-value\">");

response.addCompletionItem(internalEntity);

// Insert External DTD Entity Declaration
// see https://www.w3.org/TR/REC-xml/#dt-entdecl
CompletionItem externalEntity = new CompletionItem();
externalEntity.setLabel("Insert External DTD Entity declaration");
externalEntity.setKind(CompletionItemKind.EnumMember);
externalEntity.setFilterText("<!ENTITY");
externalEntity.setInsertTextFormat(InsertTextFormat.Snippet);
externalEntity.setFilterText("<!ENTITY ");
externalEntity.setInsertTextFormat(insertFormat);
startOffset = request.getOffset();
try {
Range editRange = getReplaceRange(startOffset, startOffset, request);
externalEntity
.setTextEdit(new TextEdit(editRange, "<!ENTITY ${0:entity-name} SYSTEM \"${1:entity-value}\" >"));
externalEntity.setDocumentation("<!ENTITY entity-name SYSTEM \"entity-value\" >");
} catch (BadLocationException e) {
LOGGER.log(Level.SEVERE, "While performing getReplaceRange for DTD !ENTITY completion.", e);
}

externalEntity
.setTextEdit(new TextEdit(editRange, "<!ENTITY ${1:entity-name} SYSTEM \"${0:entity-value}\">"));
externalEntity.setDocumentation("<!ENTITY entity-name SYSTEM \"entity-value\">");

response.addCompletionItem(externalEntity);
}

Expand Down
45 changes: 44 additions & 1 deletion ...rc/test/java/org/eclipse/lsp4xml/extensions/contentmodel/DTDCompletionExtensionsTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,50 @@ public void externalDTDCompletionAttribute() throws BadLocationException {
c("Friend", te(11, 9, 11, 9, "Friend=\"\""), "Friend"), //
c("Likes", te(11, 9, 11, 9, "Likes=\"\""), "Likes"));
}

@Test
public void externalDTDCompletionElementDecl() throws BadLocationException {
// completion on <|
String xml = "<?xml version = \"1.0\"?>\r\n" + //
"<!DOCTYPE Folks [\r\n" + //
" <!ELEMENT Folks (Person*)>\r\n" + //
" <!ELEMENT|\r\n" + //
"]>\r\n" + //
"<Folks>\r\n" + //
" " + //
"</Folks>";
XMLAssert.testCompletionFor(xml, 4, c("Insert DTD Element declaration", te(3, 1, 3, 11, "<!ELEMENT ${1:element-name} (${0:#PCDATA})>"), "<!ELEMENT "));
}

@Test
public void externalDTDCompletionElementDecl2() throws BadLocationException {
// completion on <|
String xml = "<?xml version = \"1.0\"?>\r\n" + //
"<!DOCTYPE Folks [\r\n" + //
" <!ELEMENT Folks (Person*)>\r\n" + //
" <!ELEM|\r\n" + //
"]>\r\n" + //
"<Folks>\r\n" + //
" " + //
"</Folks>";
XMLAssert.testCompletionFor(xml, 4, c("Insert DTD Element declaration", te(3, 1, 3, 7, "<!ELEMENT ${1:element-name} (${0:#PCDATA})>"), "<!ELEMENT "));
}
@Test
public void externalDTDCompletionAllDecls() throws BadLocationException {
// completion on <|
String xml = "<?xml version = \"1.0\"?>\r\n" + //
"<!DOCTYPE Folks [\r\n" + //
" <!ELEMENT Folks (Person*)>\r\n" + //
" |\r\n" + //
"]>\r\n" + //
"<Folks>\r\n" + //
" " + //
"</Folks>";
XMLAssert.testCompletionFor(xml, 4, c("Insert DTD Element declaration", te(3, 1, 3, 1, "<!ELEMENT ${1:element-name} (${0:#PCDATA})>"), "<!ELEMENT ")
,c("Insert Internal DTD Entity declaration", te(3, 1, 3, 1, "<!ENTITY ${1:entity-name} \"${0:entity-value}\">"), "<!ENTITY ")
,c("Insert DTD Attributes list declaration", te(3, 1, 3, 1, "<!ATTLIST ${1:element-name} ${2:attribute-name} ${3:ID} ${0:#REQUIRED}>"), "<!ATTLIST ")
,c("Insert External DTD Entity declaration", te(3, 1, 3, 1, "<!ENTITY ${1:entity-name} SYSTEM \"${0:entity-value}\">"), "<!ENTITY "));
}

private void testCompletionFor(String xml, CompletionItem... expectedItems) throws BadLocationException {
CompletionSettings completionSettings = new CompletionSettings();
Expand All @@ -92,6 +136,5 @@ private void testCompletionFor(String xml, CompletionItem... expectedItems) thro
completionSettings.setCapabilities(completionCapabilities);
XMLAssert.testCompletionFor(new XMLLanguageService(), xml, "src/test/resources/catalogs/catalog.xml", null,
null, null, completionSettings, expectedItems);
;
}
}

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