diff options
Diffstat (limited to 'jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/range/RangeUtil.java')
| -rw-r--r-- | jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/range/RangeUtil.java | 367 |
1 files changed, 0 insertions, 367 deletions
diff --git a/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/range/RangeUtil.java b/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/range/RangeUtil.java deleted file mode 100644 index bce86c272..000000000 --- a/jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/range/RangeUtil.java +++ /dev/null @@ -1,367 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2006 Sybase, Inc. 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: - * Sybase, Inc. - initial API and implementation - *******************************************************************************/ -package org.eclipse.jst.pagedesigner.range; - -import java.util.ArrayList; -import java.util.Collections; -import java.util.List; - -import org.eclipse.gef.EditPart; -import org.eclipse.jst.pagedesigner.parts.DocumentEditPart; -import org.eclipse.jst.pagedesigner.parts.TextEditPart; -import org.eclipse.jst.pagedesigner.viewer.DesignPosition; -import org.eclipse.jst.pagedesigner.viewer.DesignRange; -import org.eclipse.jst.pagedesigner.viewer.TextPosition; -import org.eclipse.wst.xml.core.internal.provisional.document.IDOMText; -import org.w3c.dom.DocumentFragment; -import org.w3c.dom.Element; -import org.w3c.dom.Node; -import org.w3c.dom.Text; - -/** - * @author mengbo - */ -public class RangeUtil { - /** - * append the child after the reference node as next sibling. - * - * @param child - * can't be null - * @param reference - * can't be null - */ - public static Node appendAfter(Node child, Node reference) { - Node next = reference.getNextSibling(); - if (next == null) - return reference.getParentNode().appendChild(child); - else - return reference.getParentNode().insertBefore(child, next); - } - - public static Node insertBefore(Node child, Node reference) { - return reference.getParentNode().insertBefore(child, reference); - } - - /** - * Insert a node into the specified position. The node can be an element or - * DocumentFragment. - * - * @param node - * @param position - */ - public static Node insertElement(DesignPosition position, Element node) { - EditPart containerEditPart = position.getContainerPart(); - int offset = position.getOffset(); - - if (containerEditPart instanceof TextEditPart) { - TextEditPart textPart = (TextEditPart) containerEditPart; - String textData = textPart.getTextData(); - Node textNode = (Node) textPart.getModel(); - if (offset == 0) - return insertBefore(node, textNode); - else if (offset == textData.length()) - return appendAfter(node, textNode); - else { - // inserting the element in the middle of text. - String before = textData.substring(0, offset); - String after = textData.substring(offset); - - // XXX: don't know whether setNodeValue() will do all those - // escape or not. - textNode.setNodeValue(after); - Node newnode = insertBefore(node, textNode); - - // XXX: don't know whether createTextNode() will do all those - // escape or not - Text t = textNode.getOwnerDocument().createTextNode(before); - - insertBefore(t, newnode); - return newnode; - } - } else { - return insertIntoEditPart(containerEditPart, node, offset); - } - } - - /** - * @param containerEditPart - * @param node - * @param offset - * @return - */ - private static Node insertIntoEditPart(EditPart containerEditPart, - Node node, int offset) { - Node parent = (Node) containerEditPart.getModel(); - List childParts = containerEditPart.getChildren(); - if (offset >= childParts.size()) { - // to the end of parent - return parent.appendChild(node); - } else { - Node child = (Node) ((EditPart) childParts.get(offset)).getModel(); - return insertBefore(node, child); - } - } - - public static TextPosition insertText(DesignPosition position, String data) { - EditPart containerEditPart = position.getContainerPart(); - - position = moveIntoText(position); - int offset = position.getOffset(); - - if (position.getContainerPart() instanceof TextEditPart) { - // it is guaranteeed that now the containing edit part is text node. - TextEditPart textPart = (TextEditPart) position.getContainerPart(); - String textData = textPart.getTextData(); - String before = textData.substring(0, offset); - String after = textData.substring(offset); - if (data.startsWith(" ") && before.endsWith(" ")) { - before = before.substring(0, before.length() - 1) + " "; - } - if (after.startsWith(" ") && data.endsWith(" ")) { - data = data.substring(0, data.length() - 1) + (char) 160; - } - String nextData = before + data + after; - IDOMText text = (IDOMText) textPart.getModel(); - text.setData(nextData); - return new TextPosition(text, offset + data.length()); - } else { - // can't merge into a neighboring text node. So create a text node - // of it's own - EditPart part = position.getContainerPart(); - Node parent = (Node) part.getModel(); - Text text = parent.getOwnerDocument().createTextNode(data); - insertIntoEditPart(part, text, offset); - return new TextPosition((IDOMText) text, offset); - } - } - - /** - * Try to make the position move into a text node. - * - * @param position - * @return - */ - public static DesignPosition moveIntoText(DesignPosition position) { - EditPart container = position.getContainerPart(); - if (container instanceof TextEditPart) - return position; - if (position.getOffset() > 0) { - EditPart pre = (EditPart) container.getChildren().get( - position.getOffset() - 1); - if (pre instanceof TextEditPart) { - return new DesignPosition(pre, ((TextEditPart) pre) - .getTextData().length()); - } - } - if (position.getOffset() < container.getChildren().size()) { - EditPart next = (EditPart) container.getChildren().get( - position.getOffset()); - if (next instanceof TextEditPart) { - return new DesignPosition(next, 0); - } - } - return position; - } - - /** - * try to move the position up to not inside a text. if the position is at 0 - * index or last index of a text node, then try to move it up. - * - * @param position - * @return - */ - public static DesignPosition moveOutFromText(DesignPosition position) { - EditPart container = position.getContainerPart(); - if (container instanceof TextEditPart) { - int offset = position.getOffset(); - String text = ((TextEditPart) container).getTextData(); - if (offset == 0) { - return new DesignPosition(container.getParent(), container - .getParent().getChildren().indexOf(container)); - } else if (offset == text.length()) { - return new DesignPosition(container.getParent(), container - .getParent().getChildren().indexOf(container) + 1); - } - } - return position; - } - - public static void insertDocumentFragment(DesignPosition position, - DocumentFragment fragment) { - // FIXME: NOT DONE. - } - - /** - * Test whether the range intersect with the part. - * - * @param range - * @param part - */ - public static boolean intersect(DesignRange range, EditPart part) { - if (range == null || !range.isValid()) - return false; - range = normalize(range); - if (part instanceof DocumentEditPart) - return true; - EditPart parent = part.getParent(); - int index = parent.getChildren().indexOf(part); - DesignPosition left = new DesignPosition(parent, index); - DesignPosition right = new DesignPosition(parent, index + 1); - int compare = compareDesignPosition(left, range.getEndPosition()); - if (compare == 1 || compare == 0 || compare == Integer.MIN_VALUE) - return false; - - compare = compareDesignPosition(right, range.getStartPosition()); - if (compare == -1 || compare == 0 || compare == Integer.MIN_VALUE) - return false; - - return true; - } - - /** - * make sure the start position is before end position. If the original - * range is already normalized, then the original range will be returned - * without constructing a new one. - * - * @param range - * @return - */ - public static DesignRange normalize(DesignRange range) { - if (range == null || !range.isValid()) { - return range; - } - int result = compareDesignPosition(range.getStartPosition(), range - .getEndPosition()); - if (result == 1) - return new DesignRange(range.getEndPosition(), range - .getStartPosition()); - else - return range; - } - - /** - * - * @param p1 - * @param p2 - * @return 0 means equal. 1 Means p1 is after p2. -1 means p1 is before p2. - * Integer.MIN_VALUE means some error and can't compare. - */ - public static int compareDesignPosition(DesignPosition p1, DesignPosition p2) { - if (!p1.isValid() || !p2.isValid()) - return Integer.MIN_VALUE; - if (p1.equals(p2)) - return 0; - int offset1 = p1.getOffset(); - int offset2 = p2.getOffset(); - List a1 = getAncesters(p1.getContainerPart()); - List a2 = getAncesters(p2.getContainerPart()); - if (a1 == null || a2 == null) - return Integer.MIN_VALUE; - if (a1.get(0) != a2.get(0)) - return Integer.MIN_VALUE; // not same DocumentEditPart - for (int i = 1;; i++) { - EditPart p1a = (EditPart) a1.get(i); - EditPart p2a = (EditPart) a2.get(i); - if (p1a == p2a) { - if (p1a != null) - continue; // same ancester - else { - // both are null. just compare the offset. - return offset1 < offset2 ? -1 - : (offset1 == offset2 ? 0 : 1); - } - } - // p1a != p2a. now we can just compare p1a and p2a to decide the - // order. - if (p1a != null) - offset1 = p1a.getParent().getChildren().indexOf(p1a); - if (p2a != null) - offset2 = p2a.getParent().getChildren().indexOf(p2a); - if ((p1a == null && p2a == null) || (p1a != null && p2a != null)) { - return offset1 < offset2 ? -1 : (offset1 == offset2 ? 0 : 1); - } else if (p1a == null) { - return offset1 <= offset2 ? -1 : 1; - } else { - return offset1 >= offset2 ? 1 : -1; - } - } - } - - /** - * Get a list of ancester nodes starting from the DocumentEditPart till the - * node. - * - * @param part - * @return - */ - private static List getAncesters(EditPart part) { - List list = new ArrayList(); - while (part != null) { - list.add(part); - if (part instanceof DocumentEditPart) - break; - else - part = part.getParent(); - } - if (part == null) { - // if part ==null, means we didn't find a DocumentEditPart, - // something must be wrong. - return null; - } - // reverse to make it starting from the docuemnteditpart node. - Collections.reverse(list); - list.add(null); // add an null terminator. - return list; - } - - /** - * find the smallest common ancester of two edit part. - * - * @param part1 - * @param part2 - * @return - */ - public static EditPart findCommonAncester(EditPart part1, EditPart part2) { - if (part1 == part2) { - return part1; - } - List list1 = getAncesters(part1); - if (list1 == null) - return null; - List list2 = getAncesters(part2); - if (list2 == null) - return null; - if (list1.get(0) != list2.get(0)) - return null; - EditPart common = (EditPart) list1.get(0); - for (int i = 1;; i++) { - EditPart p1 = (EditPart) list1.get(i); - EditPart p2 = (EditPart) list2.get(i); - if (p1 == null || p2 == null) - return common; - if (p1 != p2) - return common; - common = p1; - } - - } - - public static EditPart findCommonAncestor(DesignRange range) { - if (!range.isValid()) { - return null; - } - DesignPosition startPosition = range.getStartPosition(); - DesignPosition endPosition = range.getEndPosition(); - return findCommonAncester(startPosition.getContainerPart(), endPosition - .getContainerPart()); - } -} |