// Copyright (C) 2010 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.patches;
import com.google.gerrit.client.Gerrit;
import com.google.gerrit.client.changes.PatchTable;
import com.google.gerrit.client.changes.Util;
import com.google.gerrit.client.ui.ChangeLink;
import com.google.gerrit.client.ui.InlineHyperlink;
import com.google.gerrit.reviewdb.client.PatchSet;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.HTMLTable.CellFormatter;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwtexpui.globalkey.client.KeyCommand;
import com.google.gwtexpui.globalkey.client.KeyCommandSet;
import com.google.gwtexpui.safehtml.client.SafeHtml;
class NavLinks extends Composite {
public enum Nav {
PREV (0, '[', PatchUtil.C.previousFileHelp(), 0),
NEXT (2, ']', PatchUtil.C.nextFileHelp(), 1);
public int col; // Table Cell column to display link in
public int key; // key code shortcut to activate link
public String help; // help string for '?' popup
public int cmd; // index into cmds array
Nav(int c, int k, String h, int i) {
this.col = c;
this.key = k;
this.help = h;
this.cmd = i;
}
}
private final PatchSet.Id patchSetId;
private final KeyCommandSet keys;
private final Grid table;
private KeyCommand cmds[] = new KeyCommand[2];
NavLinks(KeyCommandSet kcs, PatchSet.Id forPatch) {
patchSetId = forPatch;
keys = kcs;
table = new Grid(1, 3);
initWidget(table);
final CellFormatter fmt = table.getCellFormatter();
table.setStyleName(Gerrit.RESOURCES.css().sideBySideScreenLinkTable());
fmt.setHorizontalAlignment(0, 0, HasHorizontalAlignment.ALIGN_LEFT);
fmt.setHorizontalAlignment(0, 1, HasHorizontalAlignment.ALIGN_CENTER);
fmt.setHorizontalAlignment(0, 2, HasHorizontalAlignment.ALIGN_RIGHT);
final ChangeLink up = new ChangeLink("", patchSetId);
SafeHtml.set(up, SafeHtml.asis(Util.C.upToChangeIconLink()));
table.setWidget(0, 1, up);
}
void display(int patchIndex, PatchScreen.Type type, PatchTable fileList) {
if (fileList != null) {
setupNav(Nav.PREV, fileList.getPreviousPatchLink(patchIndex, type));
setupNav(Nav.NEXT, fileList.getNextPatchLink(patchIndex, type));
} else {
setupNav(Nav.PREV, null);
setupNav(Nav.NEXT, null);
}
}
protected void setupNav(final Nav nav, final InlineHyperlink link) {
/* setup the cells */
if (link != null) {
table.setWidget(0, nav.col, link);
} else {
table.clearCell(0, nav.col);
}
/* setup the keys */
if (keys != null) {
if (cmds[nav.cmd] != null) {
keys.remove(cmds[nav.cmd]);
}
if (link != null) {
cmds[nav.cmd] = new KeyCommand(0, nav.key, nav.help) {
@Override
public void onKeyPress(KeyPressEvent event) {
link.go();
}
};
} else {
cmds[nav.cmd] = new UpToChangeCommand(patchSetId, 0, nav.key);
}
keys.add(cmds[nav.cmd]);
}
}
}