Source Code Cross Referenced for PackagesViewFlatContentProvider.java in  » IDE-Eclipse » jdt » org » eclipse » jdt » internal » ui » browsing » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Eclipse » jdt » org.eclipse.jdt.internal.ui.browsing 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*******************************************************************************
002:         * Copyright (c) 2000, 2005 IBM Corporation and others.
003:         * All rights reserved. This program and the accompanying materials
004:         * are made available under the terms of the Eclipse Public License v1.0
005:         * which accompanies this distribution, and is available at
006:         * http://www.eclipse.org/legal/epl-v10.html
007:         *
008:         * Contributors:
009:         *     IBM Corporation - initial API and implementation
010:         *******************************************************************************/package org.eclipse.jdt.internal.ui.browsing;
011:
012:        import java.util.ArrayList;
013:        import java.util.List;
014:
015:        import org.eclipse.swt.widgets.Control;
016:        import org.eclipse.swt.widgets.Display;
017:
018:        import org.eclipse.jface.viewers.IStructuredContentProvider;
019:        import org.eclipse.jface.viewers.StructuredViewer;
020:        import org.eclipse.jface.viewers.TableViewer;
021:
022:        import org.eclipse.jdt.core.IJavaElement;
023:        import org.eclipse.jdt.core.IJavaElementDelta;
024:        import org.eclipse.jdt.core.IJavaProject;
025:        import org.eclipse.jdt.core.IPackageFragment;
026:        import org.eclipse.jdt.core.IPackageFragmentRoot;
027:        import org.eclipse.jdt.core.JavaModelException;
028:
029:        /**
030:         * Table content provider for the hierarchical layout in the packages view.
031:         * <p>
032:         * XXX: The standard Java browsing part content provider needs and calls
033:         * the browsing part/view. This class currently doesn't need to do so
034:         * but might be required to later.
035:         * </p>
036:         */
037:        class PackagesViewFlatContentProvider extends LogicalPackagesProvider
038:                implements  IStructuredContentProvider {
039:            PackagesViewFlatContentProvider(StructuredViewer viewer) {
040:                super (viewer);
041:            }
042:
043:            /*
044:             * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
045:             */
046:            public Object[] getChildren(Object parentElement) {
047:
048:                if (parentElement instanceof  IJavaElement) {
049:                    IJavaElement element = (IJavaElement) parentElement;
050:
051:                    int type = element.getElementType();
052:
053:                    try {
054:                        switch (type) {
055:                        case IJavaElement.JAVA_PROJECT:
056:                            IJavaProject project = (IJavaProject) element;
057:                            IPackageFragment[] children = getPackageFragments(project
058:                                    .getPackageFragments());
059:                            if (isInCompoundState()) {
060:                                fMapToLogicalPackage.clear();
061:                                fMapToPackageFragments.clear();
062:                                return combineSamePackagesIntoLogialPackages(children);
063:                            } else
064:                                return children;
065:
066:                        case IJavaElement.PACKAGE_FRAGMENT_ROOT:
067:                            fMapToLogicalPackage.clear();
068:                            fMapToPackageFragments.clear();
069:                            IPackageFragmentRoot root = (IPackageFragmentRoot) element;
070:                            return root.getChildren();
071:
072:                        case IJavaElement.PACKAGE_FRAGMENT:
073:                            //no children in flat view
074:                            break;
075:
076:                        default:
077:                            //do nothing, empty array returned
078:                        }
079:                    } catch (JavaModelException e) {
080:                        return NO_CHILDREN;
081:                    }
082:
083:                }
084:                return NO_CHILDREN;
085:            }
086:
087:            /*
088:             * Weeds out packageFragments from external jars
089:             */
090:            private IPackageFragment[] getPackageFragments(
091:                    IPackageFragment[] iPackageFragments) {
092:                List list = new ArrayList();
093:                for (int i = 0; i < iPackageFragments.length; i++) {
094:                    IPackageFragment fragment = iPackageFragments[i];
095:                    IJavaElement el = fragment.getParent();
096:                    if (el instanceof  IPackageFragmentRoot) {
097:                        IPackageFragmentRoot root = (IPackageFragmentRoot) el;
098:                        if (root.isArchive() && root.isExternal())
099:                            continue;
100:                    }
101:                    list.add(fragment);
102:                }
103:                return (IPackageFragment[]) list
104:                        .toArray(new IPackageFragment[list.size()]);
105:            }
106:
107:            /*
108:             * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
109:             */
110:            public Object[] getElements(Object inputElement) {
111:                return getChildren(inputElement);
112:            }
113:
114:            protected void processDelta(IJavaElementDelta delta)
115:                    throws JavaModelException {
116:
117:                int kind = delta.getKind();
118:                final IJavaElement element = delta.getElement();
119:
120:                if (isClassPathChange(delta)) {
121:                    Object input = fViewer.getInput();
122:                    if (input != null) {
123:                        if (fInputIsProject
124:                                && input.equals(element.getJavaProject())) {
125:                            postRefresh(input);
126:                            return;
127:                        } else if (!fInputIsProject && input.equals(element)) {
128:                            if (element.exists())
129:                                postRefresh(input);
130:                            else
131:                                postRemove(input);
132:                            return;
133:                        }
134:                    }
135:                }
136:
137:                if (kind == IJavaElementDelta.REMOVED) {
138:                    Object input = fViewer.getInput();
139:                    if (input != null && input.equals(element)) {
140:                        postRemove(input);
141:                        return;
142:                    }
143:                }
144:
145:                if (element instanceof  IPackageFragment) {
146:                    final IPackageFragment frag = (IPackageFragment) element;
147:
148:                    if (kind == IJavaElementDelta.REMOVED) {
149:                        removeElement(frag);
150:
151:                    } else if (kind == IJavaElementDelta.ADDED) {
152:                        addElement(frag);
153:
154:                    } else if (kind == IJavaElementDelta.CHANGED) {
155:                        //just refresh
156:                        Object toBeRefreshed = element;
157:
158:                        IPackageFragment pkgFragment = (IPackageFragment) element;
159:                        LogicalPackage logicalPkg = findLogicalPackage(pkgFragment);
160:                        //deal with packages that have been filtered and are now visible
161:                        if (logicalPkg != null)
162:                            toBeRefreshed = findElementToRefresh(logicalPkg);
163:                        else
164:                            toBeRefreshed = findElementToRefresh(pkgFragment);
165:
166:                        postRefresh(toBeRefreshed);
167:                    }
168:                    //in this view there will be no children of PackageFragment to refresh
169:                    return;
170:                }
171:                processAffectedChildren(delta);
172:            }
173:
174:            //test to see if element to be refreshed is being filtered out
175:            //and if so refresh the viewers input element (JavaProject or PackageFragmentRoot)
176:            private Object findElementToRefresh(IPackageFragment fragment) {
177:                if (fViewer.testFindItem(fragment) == null) {
178:                    if (fInputIsProject)
179:                        return fragment.getJavaProject();
180:                    else
181:                        return fragment.getParent();
182:                }
183:                return fragment;
184:            }
185:
186:            //test to see if element to be refreshed is being filtered out
187:            //and if so refresh the viewers input element (JavaProject or PackageFragmentRoot)
188:            private Object findElementToRefresh(LogicalPackage logicalPackage) {
189:                if (fViewer.testFindItem(logicalPackage) == null) {
190:                    IPackageFragment fragment = logicalPackage.getFragments()[0];
191:                    return fragment.getJavaProject();
192:                }
193:                return logicalPackage;
194:            }
195:
196:            private void processAffectedChildren(IJavaElementDelta delta)
197:                    throws JavaModelException {
198:                IJavaElementDelta[] children = delta.getAffectedChildren();
199:                for (int i = 0; i < children.length; i++) {
200:                    IJavaElementDelta elementDelta = children[i];
201:                    processDelta(elementDelta);
202:                }
203:            }
204:
205:            private void postAdd(final Object child) {
206:                postRunnable(new Runnable() {
207:                    public void run() {
208:                        Control ctrl = fViewer.getControl();
209:                        if (ctrl != null && !ctrl.isDisposed()) {
210:                            ((TableViewer) fViewer).add(child);
211:                        }
212:                    }
213:                });
214:            }
215:
216:            private void postRemove(final Object object) {
217:                postRunnable(new Runnable() {
218:                    public void run() {
219:                        Control ctrl = fViewer.getControl();
220:                        if (ctrl != null && !ctrl.isDisposed()) {
221:                            ((TableViewer) fViewer).remove(object);
222:                        }
223:                    }
224:                });
225:            }
226:
227:            private void postRunnable(final Runnable r) {
228:                Control ctrl = fViewer.getControl();
229:                if (ctrl != null && !ctrl.isDisposed()) {
230:                    //	fBrowsingPart.setProcessSelectionEvents(false);
231:                    try {
232:                        Display currentDisplay = Display.getCurrent();
233:                        if (currentDisplay != null
234:                                && currentDisplay.equals(ctrl.getDisplay()))
235:                            ctrl.getDisplay().syncExec(r);
236:                        else
237:                            ctrl.getDisplay().asyncExec(r);
238:                    } finally {
239:                        //		fBrowsingPart.setProcessSelectionEvents(true);
240:                    }
241:                }
242:            }
243:
244:            private void removeElement(IPackageFragment frag) {
245:                String key = getKey(frag);
246:                LogicalPackage lp = (LogicalPackage) fMapToLogicalPackage
247:                        .get(key);
248:
249:                if (lp != null) {
250:                    lp.remove(frag);
251:                    //if you need to change the LogicalPackage to a PackageFragment
252:                    if (lp.getFragments().length == 1) {
253:                        IPackageFragment fragment = lp.getFragments()[0];
254:                        fMapToLogicalPackage.remove(key);
255:                        fMapToPackageFragments.put(key, fragment);
256:
257:                        //@Improve: Should I replace this with a refresh of the parent?
258:                        postRemove(lp);
259:                        postAdd(fragment);
260:                    }
261:                    return;
262:                } else {
263:                    fMapToPackageFragments.remove(key);
264:                    postRemove(frag);
265:                }
266:            }
267:
268:            private void postRefresh(final Object element) {
269:                postRunnable(new Runnable() {
270:                    public void run() {
271:                        Control ctrl = fViewer.getControl();
272:                        if (ctrl != null && !ctrl.isDisposed()) {
273:                            fViewer.refresh(element);
274:                        }
275:                    }
276:                });
277:            }
278:
279:            private void addElement(IPackageFragment frag) {
280:                String key = getKey(frag);
281:                LogicalPackage lp = (LogicalPackage) fMapToLogicalPackage
282:                        .get(key);
283:
284:                if (lp != null && lp.belongs(frag)) {
285:                    lp.add(frag);
286:                    return;
287:                }
288:
289:                IPackageFragment fragment = (IPackageFragment) fMapToPackageFragments
290:                        .get(key);
291:                if (fragment != null) {
292:                    //must create a new LogicalPackage
293:                    if (!fragment.equals(frag)) {
294:                        lp = new LogicalPackage(fragment);
295:                        lp.add(frag);
296:                        fMapToLogicalPackage.put(key, lp);
297:
298:                        //@Improve: should I replace this with a refresh?
299:                        postRemove(fragment);
300:                        postAdd(lp);
301:
302:                        return;
303:                    }
304:                }
305:
306:                else {
307:                    fMapToPackageFragments.put(key, frag);
308:                    postAdd(frag);
309:                }
310:            }
311:        }
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