| // Copyright (C) 2008 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gerrit.client.changes; |
| |
| import com.google.gerrit.client.Gerrit; |
| import com.google.gerrit.client.changes.ChangeTable.ApprovalViewType; |
| import com.google.gerrit.client.rpc.ScreenLoadCallback; |
| import com.google.gerrit.client.ui.Hyperlink; |
| import com.google.gerrit.client.ui.Screen; |
| import com.google.gerrit.common.data.ChangeInfo; |
| import com.google.gerrit.common.data.SingleListChangeInfo; |
| import com.google.gerrit.reviewdb.AccountGeneralPreferences; |
| import com.google.gwt.event.dom.client.KeyPressEvent; |
| import com.google.gwt.user.client.History; |
| import com.google.gwt.user.client.rpc.AsyncCallback; |
| import com.google.gwt.user.client.ui.HorizontalPanel; |
| import com.google.gwtexpui.globalkey.client.KeyCommand; |
| |
| import java.util.List; |
| |
| |
| public abstract class PagedSingleListScreen extends Screen { |
| protected static final String MIN_SORTKEY = ""; |
| protected static final String MAX_SORTKEY = "z"; |
| |
| protected final int pageSize; |
| private ChangeTable table; |
| private ChangeTable.Section section; |
| protected Hyperlink prev; |
| protected Hyperlink next; |
| protected List<ChangeInfo> changes; |
| |
| protected final String anchorPrefix; |
| protected boolean useLoadPrev; |
| protected String pos; |
| |
| protected PagedSingleListScreen(final String anchorToken, |
| final String positionToken) { |
| anchorPrefix = anchorToken; |
| useLoadPrev = positionToken.startsWith("p,"); |
| pos = positionToken.substring(2); |
| |
| if (Gerrit.isSignedIn()) { |
| final AccountGeneralPreferences p = |
| Gerrit.getUserAccount().getGeneralPreferences(); |
| final short m = p.getMaximumPageSize(); |
| pageSize = 0 < m ? m : AccountGeneralPreferences.DEFAULT_PAGESIZE; |
| } else { |
| pageSize = AccountGeneralPreferences.DEFAULT_PAGESIZE; |
| } |
| } |
| |
| @Override |
| protected void onInitUI() { |
| super.onInitUI(); |
| prev = new Hyperlink(Util.C.pagedChangeListPrev(), true, ""); |
| prev.setVisible(false); |
| |
| next = new Hyperlink(Util.C.pagedChangeListNext(), true, ""); |
| next.setVisible(false); |
| |
| table = new ChangeTable(true) { |
| { |
| keysNavigation.add(new DoLinkCommand(0, 'p', Util.C |
| .changeTablePagePrev(), prev)); |
| keysNavigation.add(new DoLinkCommand(0, 'n', Util.C |
| .changeTablePageNext(), next)); |
| } |
| }; |
| section = new ChangeTable.Section(null, ApprovalViewType.STRONGEST, null); |
| |
| table.addSection(section); |
| table.setSavePointerId(anchorPrefix); |
| add(table); |
| |
| final HorizontalPanel buttons = new HorizontalPanel(); |
| buttons.setStyleName(Gerrit.RESOURCES.css().changeTablePrevNextLinks()); |
| buttons.add(prev); |
| buttons.add(next); |
| add(buttons); |
| } |
| |
| @Override |
| protected void onLoad() { |
| super.onLoad(); |
| if (useLoadPrev) { |
| loadPrev(); |
| } else { |
| loadNext(); |
| } |
| } |
| |
| @Override |
| public void registerKeys() { |
| super.registerKeys(); |
| table.setRegisterKeys(true); |
| } |
| |
| protected abstract void loadPrev(); |
| |
| protected abstract void loadNext(); |
| |
| protected AsyncCallback<SingleListChangeInfo> loadCallback() { |
| return new ScreenLoadCallback<SingleListChangeInfo>(this) { |
| @Override |
| protected void preDisplay(final SingleListChangeInfo result) { |
| display(result); |
| } |
| }; |
| } |
| |
| protected void display(final SingleListChangeInfo result) { |
| changes = result.getChanges(); |
| |
| if (!changes.isEmpty()) { |
| final ChangeInfo f = changes.get(0); |
| final ChangeInfo l = changes.get(changes.size() - 1); |
| |
| prev.setTargetHistoryToken(anchorPrefix + ",p," + f.getSortKey()); |
| next.setTargetHistoryToken(anchorPrefix + ",n," + l.getSortKey()); |
| |
| if (useLoadPrev) { |
| prev.setVisible(!result.isAtEnd()); |
| next.setVisible(!MIN_SORTKEY.equals(pos)); |
| } else { |
| prev.setVisible(!MAX_SORTKEY.equals(pos)); |
| next.setVisible(!result.isAtEnd()); |
| } |
| } |
| |
| table.setAccountInfoCache(result.getAccounts()); |
| section.display(result.getChanges()); |
| table.finishDisplay(); |
| } |
| |
| private static final class DoLinkCommand extends KeyCommand { |
| private final Hyperlink link; |
| |
| private DoLinkCommand(int mask, char key, String help, Hyperlink l) { |
| super(mask, key, help); |
| link = l; |
| } |
| |
| @Override |
| public void onKeyPress(final KeyPressEvent event) { |
| if (link.isVisible()) { |
| History.newItem(link.getTargetHistoryToken()); |
| } |
| } |
| } |
| } |