diff options
Diffstat (limited to 'bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/parser/JSPReParser.java')
| -rw-r--r-- | bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/parser/JSPReParser.java | 369 |
1 files changed, 0 insertions, 369 deletions
diff --git a/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/parser/JSPReParser.java b/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/parser/JSPReParser.java deleted file mode 100644 index fcb0642c96..0000000000 --- a/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/parser/JSPReParser.java +++ /dev/null @@ -1,369 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2004, 2005 IBM Corporation and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Eclipse Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: - * IBM Corporation - initial API and implementation - *******************************************************************************/ -package org.eclipse.jst.jsp.core.internal.parser; - - -import java.util.Iterator; - -import org.eclipse.jst.jsp.core.internal.contentmodel.tld.provisional.JSP11TLDNames; -import org.eclipse.jst.jsp.core.internal.provisional.JSP12Namespace; -import org.eclipse.jst.jsp.core.internal.regions.DOMJSPRegionContexts; -import org.eclipse.wst.sse.core.internal.ltk.parser.RegionParser; -import org.eclipse.wst.sse.core.internal.ltk.parser.StructuredDocumentRegionParser; -import org.eclipse.wst.sse.core.internal.provisional.events.StructuredDocumentEvent; -import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion; -import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegionList; -import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredTextReParser; -import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion; -import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegionContainer; -import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegionList; -import org.eclipse.wst.sse.core.internal.text.CoreNodeList; -import org.eclipse.wst.sse.core.internal.util.Debug; -import org.eclipse.wst.xml.core.internal.parser.XMLStructuredDocumentReParser; -import org.eclipse.wst.xml.core.internal.regions.DOMRegionContext; - -public class JSPReParser extends XMLStructuredDocumentReParser { - - /** - * Allow a reparser to check for extra syntactic cases that require - * parsing beyond the flatNode boundary. - * - * This implementation adds JSP language markers (comments are handled - * elsewhere). - */ - protected StructuredDocumentEvent checkForCrossStructuredDocumentRegionSyntax() { - StructuredDocumentEvent result = super.checkForCrossStructuredDocumentRegionSyntax(); - // None of the superclass' cases were valid, so check for JSP cases - if (result == null) { - result = checkForJSP(); - } - return result; - } - - /** - * A change to a JSP tag can result in all being reparsed. - */ - private StructuredDocumentEvent checkForJSP() { - StructuredDocumentEvent result = null; - result = checkForCriticalKey("<%"); //$NON-NLS-1$ - if (result == null) - result = checkForCriticalKey("<%="); //$NON-NLS-1$ - if (result == null) - result = checkForCriticalKey("<%!"); //$NON-NLS-1$ - if (result == null) - result = checkForCriticalKey("%>"); //$NON-NLS-1$ - - return result; - } - - /** - * If a comment start or end tag is being added or deleted, we'll rescan - * the whole document. The reason is that content that is revealed or - * commented out can effect the interpretation of the rest of the - * document. Note: for now this is very XML/JSP specific, can - * refactor/improve later. - */ - protected StructuredDocumentEvent checkForComments() { - - StructuredDocumentEvent result = super.checkForComments(); - - if (result == null) - result = checkForCriticalKey("<%--"); //$NON-NLS-1$ - if (result == null) - result = checkForCriticalKey("--%>"); //$NON-NLS-1$ - // we'll also check for these degenerate cases - if (result == null) - result = checkForCriticalKey("<%---%>"); //$NON-NLS-1$ - - return result; - } - - /** - * The core reparsing method ... after the dirty start and dirty end have - * been calculated elsewhere. - this method overrides, does not extend - * super's method. changes/fixes to super may have to be made here as - * well. - */ - protected StructuredDocumentEvent reparse(IStructuredDocumentRegion dirtyStart, IStructuredDocumentRegion dirtyEnd) { - StructuredDocumentEvent result = null; - int rescanStart = -1; - int rescanEnd = -1; - boolean firstTime = false; - boolean detectedBreakingChange = false; - - // - // "save" the oldNodes (that may be replaced) in a list - CoreNodeList oldNodes = formOldNodes(dirtyStart, dirtyEnd); - - if (containsBreakingChange(oldNodes) || isBreakingWithNestedTag(dirtyStart, dirtyEnd)) { - if (Debug.debugTaglibs) - System.out.println("reparse: is taglib or include"); //$NON-NLS-1$ - detectedBreakingChange = true; - rescanStart = 0; - rescanEnd = fStructuredDocument.getLength() + fLengthDifference; - oldNodes = formOldNodes(fStructuredDocument.getFirstStructuredDocumentRegion(), fStructuredDocument.getLastStructuredDocumentRegion()); - clearTaglibInfo(); - } - else if (dirtyStart == null || dirtyEnd == null) { - // dirtyStart or dirty end are null, then that means we didn't - // have a - // cached node, which means we have an empty document, so we - // just need to rescan the changes - rescanStart = 0; - rescanEnd = fChanges.length(); - firstTime = true; - } - else { - // set the start of the text to rescan - rescanStart = dirtyStart.getStart(); - // - // set the end of the text to rescan - // notice we use the same rationale as for the rescanStart, - // with the added caveat that length has to be added to it, - // to compensate for the new text which has been added or deleted. - // If changes has zero length, then "length" will be negative, - // since - // we are deleting text. Otherwise, use the difference between - // what's selected to be replaced and the length of the new text. - rescanEnd = dirtyEnd.getEnd() + fLengthDifference; - } - - // now that we have the old stuff "saved" away, update the document - // with the changes. - fStructuredDocument.updateDocumentData(fStart, fLengthToReplace, fChanges); - // ------------------ now the real work - result = core_reparse(rescanStart, rescanEnd, oldNodes, firstTime); - // - - // if we did not detect a breaking type of change at the beginning, - // but - // do now, then reparse all! If we did detect them, then we may or may - // not detect again, but presumably we've already set up to re-parsed - // everthing, so no need to do again. - if ((!detectedBreakingChange) && (containsBreakingChange(oldNodes))) { - clearTaglibInfo(); - // reparse all - oldNodes = formOldNodes(fStructuredDocument.getFirstStructuredDocumentRegion(), fStructuredDocument.getLastStructuredDocumentRegion()); - result = core_reparse(0, fStructuredDocument.getLength(), oldNodes, firstTime); - } - - // event is returned to the caller, incase there is - // some optimization they can do - return result; - } - - /** - * Verifies that the regions given, representing the contents of a - * IStructuredDocumentRegion, contain regions that could alter the - * behavior of the parser or the parsing of areas outside of the regions - * given. - */ - private boolean isBreakingChange(IStructuredDocumentRegion node, ITextRegionList regions) { - return isTaglibOrInclude(node, regions) || isJspRoot(regions); - } - - /** - * Verifies that the regions given, representing the regions touched by a - * text change have: 1) ...an insertion at the textEndOffset of an - * XML_TAG_OPEN that's in it's own IStructuredDocumentRegion and preceded - * by an unended IStructuredDocumentRegion 2) ...a deletion happening in - * an XML_EMPTY_TAG_CLOSE that ends a ITextRegionContainer 3) ...an - * insertion happening with a ' <' character somewhere in an XML attribute - * name or value 4) ...a deletion of a normal XML_TAG_CLOSE since - * subsequent tags become attribute values - */ - - private boolean isBreakingWithNestedTag(boolean changesIncludeA_lt, boolean delsIncludeA_gt, IStructuredDocumentRegion parent, ITextRegion region) { - boolean result = false; - - IStructuredDocumentRegion previous = parent.getPrevious(); - // case 1 test - if (parent.getRegions().size() == 1 && region.getType() == DOMRegionContext.XML_TAG_OPEN && (previous == null || (!previous.isEnded() || previous.getType() == DOMRegionContext.XML_CONTENT))) { - result = true; - } - // case 2 test - if (region instanceof ITextRegionContainer) { - ITextRegionContainer container = (ITextRegionContainer) region; - ITextRegion internal = container.getRegions().get(container.getRegions().size() - 1); - if (internal.getType() == DOMRegionContext.WHITE_SPACE && container.getRegions().size() >= 2) - internal = container.getRegions().get(container.getRegions().size() - 2); - if (internal.getType() == DOMRegionContext.XML_EMPTY_TAG_CLOSE) { - result = true; - } - } - // case 3 test - if (changesIncludeA_lt && (region.getType() == DOMRegionContext.XML_TAG_ATTRIBUTE_NAME || region.getType() == DOMRegionContext.XML_TAG_ATTRIBUTE_VALUE)) { - result = true; - } - // case 4 test - if (delsIncludeA_gt && region.getType() == DOMRegionContext.XML_TAG_CLOSE) { - result = true; - } - return result; - } - - /** - * Verifies that the regions given, representing the contents of a - * IStructuredDocumentRegion, includes a jsp:root tag - */ - private boolean isJspRoot(ITextRegionList regions) { - return regions.size() > 1 && regions.get(0).getType() == DOMRegionContext.XML_TAG_OPEN && regions.get(1).getType() == DOMJSPRegionContexts.JSP_ROOT_TAG_NAME; - } - - /** - * Verifies that the regions given, representing the contents of a - * IStructuredDocumentRegion, includes a valid taglib directive or include - * directive - */ - private boolean isTaglibOrInclude(IStructuredDocumentRegion node, ITextRegionList regions) { - boolean sizeAndTypesMatch = (regions.size() > 1) && (regions.get(1).getType() == DOMJSPRegionContexts.JSP_DIRECTIVE_NAME) && (regions.get(0).getType() == DOMJSPRegionContexts.JSP_DIRECTIVE_OPEN || regions.get(0).getType() == DOMRegionContext.XML_TAG_OPEN); - if (!sizeAndTypesMatch) - return false; - ITextRegion region = regions.get(1); - String directiveName = node.getText(region); - return sizeAndTypesMatch && (directiveName.equals(JSP11TLDNames.TAGLIB) || directiveName.equals(JSP11TLDNames.INCLUDE) || directiveName.equals(JSP12Namespace.ElementName.DIRECTIVE_TAGLIB) || directiveName.equals(JSP12Namespace.ElementName.DIRECTIVE_INCLUDE)); - } - - private void clearTaglibInfo() { - if (Debug.debugTaglibs) - System.out.println("clearing taglib info"); //$NON-NLS-1$ - RegionParser parser = fStructuredDocument.getParser(); - if (parser instanceof StructuredDocumentRegionParser) - ((StructuredDocumentRegionParser) parser).resetHandlers(); - } - - private boolean containsBreakingChange(IStructuredDocumentRegionList list) { - boolean contains = false; - for (int i = 0; i < list.getLength(); i++) { - IStructuredDocumentRegion node = list.item(i); - if (isBreakingChange(node, node.getRegions())) { - contains = true; - break; - } - } - return contains; - } - - protected IStructuredDocumentRegion findDirtyEnd(int end) { - - IStructuredDocumentRegion result = super.findDirtyEnd(end); - - // if not well formed, get one past, if its not null - - // now, if any of to-be-scanned flatnodes are the start of a jsp - // region, we'll - // reparse all the way to the end, to be sure we detect embedded - // regions (or not-embedded regions) correctly. - // notice we don't need to do if we're only processing one node. - // notice too we have a strong assumption here that dirtyStart has - // already been found! - // - // note that dirtyEnd is not checked in the do-block below, so we'll - // check it first. - if (isJSPEmbeddedStartOrEnd(result)) { - result = fStructuredDocument.getLastStructuredDocumentRegion(); - } - else { - // when end node and start node are the same, we only need the - // above - // check, otherwise, there's a few cases that we'll search the - // rest of the - // flatnodes needlessly. - if (result != dirtyStart) { - IStructuredDocumentRegion searchNode = dirtyStart; - do { - if (isJSPEmbeddedStartOrEnd(searchNode)) { - result = fStructuredDocument.getLastStructuredDocumentRegion(); - break; - } - else { - searchNode = searchNode.getNext(); - } - // if we get to the current dirty end, or end of - // flatnodes, without finding JSP region then we - // don't need to check further - } - while ((searchNode != result) && (searchNode != null)); - } - } - // result should never be null, but cachedNode needs to be protected - // from being changed to null - if (result != null) - fStructuredDocument.setCachedDocumentRegion(result); - dirtyEnd = result; - return dirtyEnd; - } - - private boolean isBreakingWithNestedTag(IStructuredDocumentRegion start, IStructuredDocumentRegion end) { - boolean result = false; - boolean changesIncludeA_lt = fChanges != null && fChanges.indexOf('<') >= 0; - boolean delsIncludeA_gt = fDeletedText != null && fDeletedText.indexOf('>') >= 0; - - // List regions = new ArrayList(); - IStructuredDocumentRegion node = start; - int endReplace = fStart + fLengthToReplace; - while (end != null && node != end.getNext()) { - Iterator i = node.getRegions().iterator(); - while (i.hasNext()) { - ITextRegion region = (ITextRegion) i.next(); - if (intersects(node, region, fStart, endReplace)) { - - result = isBreakingWithNestedTag(changesIncludeA_lt, delsIncludeA_gt, node, region); - - if (result) - break; - } - } - node = node.getNext(); - if (result) - break; - } - return result; - } - - private boolean intersects(IStructuredDocumentRegion node, ITextRegion region, int low, int high) { - int start = node.getStartOffset(region); - int end = node.getEndOffset(region); - return (end >= low && start <= high) || (start <= low && end >= low) || (start <= high && end >= high); - } - - /** - * Returns true if potentially could be a jsp embedded region. Things like - * JSP Declaration can't be embedded. - */ - private boolean isJSPEmbeddedStartOrEnd(IStructuredDocumentRegion flatNode) { - boolean result = false; - String type = flatNode.getType(); - result = ((type == DOMJSPRegionContexts.JSP_SCRIPTLET_OPEN) || (type == DOMJSPRegionContexts.JSP_EXPRESSION_OPEN) || (type == DOMJSPRegionContexts.JSP_DECLARATION_OPEN)); - return result; - } - - /** - * extends super class behavior - */ - protected boolean isPartOfBlockRegion(IStructuredDocumentRegion flatNode) { - boolean result = false; - String type = flatNode.getType(); - result = ((type == DOMJSPRegionContexts.JSP_CLOSE) || (type == DOMJSPRegionContexts.JSP_CONTENT) || super.isPartOfBlockRegion(flatNode)); - return result; - } - - public IStructuredTextReParser newInstance() { - return new JSPReParser(); - } - - public StructuredDocumentEvent quickCheck() { - if (containsBreakingChange(new CoreNodeList(dirtyStart, dirtyEnd))) - return null; - return super.quickCheck(); - } - -} |