diff options
Diffstat (limited to 'bundles/org.eclipse.wst.xml.core/src/org/eclipse/wst/xml/core/internal/parser/regions/RegionUpdateRule.java')
| -rw-r--r-- | bundles/org.eclipse.wst.xml.core/src/org/eclipse/wst/xml/core/internal/parser/regions/RegionUpdateRule.java | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/bundles/org.eclipse.wst.xml.core/src/org/eclipse/wst/xml/core/internal/parser/regions/RegionUpdateRule.java b/bundles/org.eclipse.wst.xml.core/src/org/eclipse/wst/xml/core/internal/parser/regions/RegionUpdateRule.java deleted file mode 100644 index d43afedde9..0000000000 --- a/bundles/org.eclipse.wst.xml.core/src/org/eclipse/wst/xml/core/internal/parser/regions/RegionUpdateRule.java +++ /dev/null @@ -1,205 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2001, 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 - * Jens Lukowski/Innoopract - initial renaming/restructuring - * - *******************************************************************************/ -package org.eclipse.wst.xml.core.internal.parser.regions; - -import org.eclipse.wst.sse.core.internal.provisional.events.RegionChangedEvent; -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.ITextRegion; -import org.eclipse.wst.sse.core.internal.util.Debug; -import org.eclipse.wst.sse.core.internal.util.Utilities; - - -/** - * - * This is a utility class to centralize 'region' update. Note: care must be - * taken that is is not used for StructuredDocumentRegions, or container - * regions, its only for "token regions" - * - */ -public class RegionUpdateRule { - - static public boolean allLetterOrDigit(String changes) { - boolean result = true; - for (int i = 0; i < changes.length(); i++) { - // TO_DO_FUTURE: check that a Java Letter or Digit is - // the same thing as an XML letter or digit - if (!(Character.isLetterOrDigit(changes.charAt(i)))) { - result = false; - break; - } - } - return result; - } - - static public boolean allWhiteSpace(String changes) { - boolean result = true; - for (int i = 0; i < changes.length(); i++) { - if (!Character.isWhitespace(changes.charAt(i))) { - result = false; - break; - } - } - return result; - } - - static public boolean canHandleAsLetterOrDigit(ITextRegion region, IStructuredDocumentRegion parent, String changes, int requestStart, int lengthToReplace) { - if (parent == null) - return canHandleAsLetterOrDigit(region, changes, requestStart, lengthToReplace); - boolean result = false; - // Make sure we are in a non-white space area - if ((requestStart <= (parent.getTextEndOffset(region))) && (allLetterOrDigit(changes))) { - result = true; - } - return result; - } - - static public boolean canHandleAsLetterOrDigit(ITextRegion region, String changes, int requestStart, int lengthToReplace) { - boolean result = false; - // Make sure we are in a non-white space area - if ((requestStart <= (region.getTextEnd())) && (allLetterOrDigit(changes))) { - result = true; - } - return result; - } - - static public boolean canHandleAsWhiteSpace(ITextRegion region, IStructuredDocumentRegion parent, String changes, int requestStart, int lengthToReplace) { - // we don't explect a null parent, but just in case! - // (in which case, we must be dealing with regions that are - // structuredDocumentRegions). - if (parent == null) - return canHandleAsWhiteSpace(region, changes, requestStart, lengthToReplace); - boolean result = false; - // if we are in the "white space" area of a region, then - // we don't want to handle, a reparse is needed. - // the white space region is consider anywhere that would - // leave whitespace between this character and the text part. - // and of course, we can insert whitespace in whitespace region - // - // if there is no whitespace in this region, no need to look further - if (region.getEnd() > region.getTextEnd()) { - // no need to add one to end of text, as we used to, since we - // change definition of length to equate to offset plus one. - if (requestStart > parent.getTextEndOffset(region)) { - // ok, we are in the whitespace region, so we can't handle, - // unless - // we are just inserting whitespace. - if (allWhiteSpace(changes)) { - result = true; - } else { - result = false; - } - } - } - return result; - } - - static public boolean canHandleAsWhiteSpace(ITextRegion region, String changes, int requestStart, int lengthToReplace) { - boolean result = false; - // if we are in the "white space" area of a region, then - // we don't want to handle, a reparse is needed. - // the white space region is consider anywhere that would - // leave whitespace between this character and the text part. - // and of course, we can insert whitespace in whitespace region - // - // if there is no whitespace in this region, no need to look further - if (region.getEnd() > region.getTextEnd()) { - // no need to add one to end of text, as we used to, since we - // change definition of length to equate to offset plus one. - if (requestStart > region.getTextEnd()) { - // ok, we are in the whitespace region, so we can't handle, - // unless - // we are just inserting whitespace. - if (allWhiteSpace(changes)) { - result = true; - } else { - result = false; - } - } - } - return result; - } - - // need an adjust text length API before this can be used - static public StructuredDocumentEvent updateModel(ITextRegion region, Object requester, IStructuredDocumentRegion parent, String changes, int requestStart, int lengthToReplace) { - RegionChangedEvent result = null; - // if the region is an easy type (e.g. attribute value), - // and the requested changes are all - // alphanumeric, then make the change here locally. - // (This can obviously be made more sophisticated as the need arises, - // but should - // always follow this pattern.) - if (Debug.debugStructuredDocument) { - System.out.println("\t\tContextRegion::updateModel"); //$NON-NLS-1$ - System.out.println("\t\t\tregion type is " + region.getType()); //$NON-NLS-1$ - } - boolean canHandle = false; - // note: we'll always handle deletes from these - // regions ... if its already that region, - // deleting something from it won't change its - // type. (remember, the calling program needs - // to insure we are not called, if not all contained - // on one region. - if ((changes == null) || (changes.length() == 0)) { - // delete case - // We can not do the quick delete, if - // if all the text in a region is to be deleted. - // Or, if the delete starts in the white space region. - // In these cases, a reparse is needed. - // Minor note, we use textEnd-start since it always - // less than or equal to end-start. This might - // cause us to miss a few cases we could have handled, - // but will prevent us from trying to handle funning cases - // involving whitespace. - if ((region.getStart() >= region.getTextEnd()) || (Math.abs(lengthToReplace) >= region.getTextEnd() - region.getStart())) { - canHandle = false; - } else { - canHandle = true; - } - } else { - if ((RegionUpdateRule.canHandleAsWhiteSpace(region, parent, changes, requestStart, lengthToReplace)) || RegionUpdateRule.canHandleAsLetterOrDigit(region, parent, changes, requestStart, lengthToReplace)) { - canHandle = true; - } else { - canHandle = false; - } - } - if (canHandle) { - // at this point, we still have the old region. We won't create a - // new instance, we'll just update the one we have, by changing - // its end postion, - // The parent flatnode, upon return, has responsibility - // for updating sibling regions. - // and in turn, the structuredDocument itself has responsibility - // for - // updating the text store and down stream flatnodes. - if (Debug.debugStructuredDocument) { - System.out.println("change handled by region"); //$NON-NLS-1$ - } - int lengthDifference = Utilities.calculateLengthDifference(changes, lengthToReplace); - // Note: we adjust both end and text end, because for any change - // that is in only the trailing whitespace region, we should not - // do a quick change, - // so 'canHandle' should have been false for those case. - region.adjustLength(lengthDifference); - // TO_DO_FUTURE: cache value of canHandleAsWhiteSpace from above - // If we are handling as whitespace, there is no need to increase - // the text length, only - // the total length is changing. - if (!RegionUpdateRule.canHandleAsWhiteSpace(region, parent, changes, region.getStart(), lengthToReplace)) { - // region.adjustTextLength(lengthDifference); - } - result = new RegionChangedEvent(parent.getParentDocument(), requester, parent, region, changes, requestStart, lengthToReplace); - } - return result; - } -} |