/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.waveprotocol.wave.client.wavepanel.impl.focus;
import org.waveprotocol.wave.client.wavepanel.view.AnchorView;
import org.waveprotocol.wave.client.wavepanel.view.BlipMetaView;
import org.waveprotocol.wave.client.wavepanel.view.BlipView;
import org.waveprotocol.wave.client.wavepanel.view.ConversationView;
import org.waveprotocol.wave.client.wavepanel.view.InlineConversationView;
import org.waveprotocol.wave.client.wavepanel.view.InlineThreadView;
import org.waveprotocol.wave.client.wavepanel.view.RootThreadView;
import org.waveprotocol.wave.client.wavepanel.view.ThreadView;
import org.waveprotocol.wave.client.wavepanel.view.TopConversationView;
import org.waveprotocol.wave.client.wavepanel.view.View;
/**
* Traverses the wave panel's view structure, defining the blip ordering for
* focus movement.
*
*/
public final class ViewTraverser {
private boolean skipCollapsedContent;
public void skipCollapsedContent() {
this.skipCollapsedContent = true;
}
public void includeCollapsedContent() {
this.skipCollapsedContent = false;
}
/** @return the input view, but after maybe filtering collapsed content. */
private boolean skip(InlineConversationView view) {
return skipCollapsedContent && view.isCollapsed();
}
/** @return the input view, but after maybe filtering collapsed content. */
private boolean skip(InlineThreadView view) {
return skipCollapsedContent && view.isCollapsed();
}
public BlipView getFirst(ConversationView v) {
return getNextPre(v, v.getRootThread());
}
public BlipView getNext(BlipView blip) {
BlipMetaView meta = blip.getMeta();
return meta != null ? getNextPre(blip, meta) : getNextPost(blip, meta);
}
public BlipView getLast(ConversationView v) {
return getPrevPre(v, v.getRootThread());
}
public BlipView getPrevious(BlipView b) {
return getPrevPost(b.getParent(), b);
}
//
// Next Pre.
//
private BlipView getNextPre(ConversationView parent, RootThreadView thread) {
BlipView first = thread.getBlipAfter(null);
return first != null ? getNextPre(thread, first) : getNextPost(parent, thread);
}
private BlipView getNextPre(ThreadView parent, BlipView blip) {
return blip;
}
private BlipView getNextPre(BlipView parent, BlipMetaView meta) {
AnchorView first = meta.getInlineAnchorAfter(null);
return first != null ? getNextPre(meta, first) : getNextPost(parent, meta);
}
private BlipView getNextPre(BlipMetaView parent, AnchorView anchor) {
InlineThreadView contents = anchor.getThread();
return contents != null ? getNextPre(anchor, contents) : getNextPost(parent, anchor);
}
private BlipView getNextPre(AnchorView parent, InlineThreadView thread) {
BlipView first = skip(thread) ? null : thread.getBlipAfter(null);
return first != null ? getNextPre(thread, first) : getNextPost(parent, thread);
}
private BlipView getNextPre(BlipView parent, AnchorView anchor) {
InlineThreadView contents = anchor.getThread();
return contents != null ? getNextPre(anchor, contents) : getNextPost(parent, anchor);
}
private BlipView getNextPre(BlipView parent, InlineConversationView conversation) {
RootThreadView root = skip(conversation) ? null : conversation.getRootThread();
return root != null ? getNextPre(conversation, root) : getNextPost(parent, conversation);
}
//
// Next Post.
//
private BlipView getNextPost(View parent, View child) {
if (parent == null) {
return null;
}
switch (parent.getType()) {
case ANCHOR:
return getNextPost((AnchorView) parent, (InlineThreadView) child);
case META:
return getNextPost((BlipMetaView) parent, (AnchorView) child);
case BLIP:
switch (child.getType()) {
case META:
return getNextPost((BlipView) parent, (BlipMetaView) child);
case ANCHOR:
return getNextPost((BlipView) parent, (AnchorView) child);
case INLINE_CONVERSATION:
return getNextPost((BlipView) parent, (InlineConversationView) child);
default:
throw new RuntimeException("unknown blip child type: " + child.getType());
}
case INLINE_THREAD:
return getNextPost((InlineThreadView) parent, (BlipView) child);
case ROOT_THREAD:
return getNextPost((RootThreadView) parent, (BlipView) child);
case ROOT_CONVERSATION:
return getNextPost((TopConversationView) parent, (RootThreadView) child);
case INLINE_CONVERSATION:
return getNextPost((InlineConversationView) parent, (RootThreadView) child);
default:
throw new RuntimeException("unknown container type: " + parent.getType());
}
}
private BlipView getNextPost(InlineConversationView parent, RootThreadView child) {
return getNextPost(parent.getParent(), parent);
}
private BlipView getNextPost(TopConversationView parent, RootThreadView child) {
return null;
}
private BlipView getNextPost(ThreadView parent, BlipView child) {
BlipView next = parent.getBlipAfter(child);
return next != null ? getNextPre(parent, next) : getNextPost(parent.getParent(), parent);
}
private BlipView getNextPost(BlipView parent, BlipMetaView meta) {
return getNextPost(parent, (AnchorView) null);
}
private BlipView getNextPost(BlipView parent, AnchorView anchor) {
AnchorView next = parent.getDefaultAnchorAfter(anchor);
return (next != null) ? getNextPre(parent, next) : getNextPost(parent,
(InlineConversationView) null);
}
private BlipView getNextPost(BlipView parent, InlineConversationView conversation) {
InlineConversationView next = parent.getConversationAfter(conversation);
return (next != null) ? getNextPre(parent, next) : getNextPost(parent.getParent(), parent);
}
private BlipView getNextPost(BlipMetaView parent, AnchorView anchor) {
AnchorView next = parent.getInlineAnchorAfter(anchor);
return next != null ? getNextPre(parent, next) : getNextPost(parent.getParent(), parent);
}
private BlipView getNextPost(AnchorView parent, InlineThreadView thread) {
return getNextPost(parent.getParent(), parent);
}
//
// Prev Pre.
//
private BlipView getPrevPre(ConversationView parent, RootThreadView thread) {
BlipView last = thread.getBlipBefore(null);
return last != null ? getPrevPre(thread, last) : getPrevPost(parent, thread);
}
private BlipView getPrevPre(ThreadView parent, BlipView blip) {
InlineConversationView last = blip.getConversationBefore(null);
return last != null ? getPrevPre(blip, last) : getPrevPost(blip, (InlineConversationView) null);
}
private BlipView getPrevPre(AnchorView parent, InlineThreadView thread) {
BlipView last = skip(thread) ? null : thread.getBlipBefore(null);
return last != null ? getPrevPre(thread, last) : getPrevPost(parent, thread);
}
private BlipView getPrevPre(BlipView parent, BlipMetaView meta) {
AnchorView last = meta.getInlineAnchorBefore(null);
return last != null ? getPrevPre(meta, last) : getPrevPost(parent, meta);
}
private BlipView getPrevPre(BlipView parent, AnchorView anchor) {
InlineThreadView contents = anchor.getThread();
return contents != null ? getPrevPre(anchor, contents)
: getPrevPost(anchor.getParent(), anchor);
}
private BlipView getPrevPre(BlipView parent, InlineConversationView conversation) {
RootThreadView root = skip(conversation) ? null : conversation.getRootThread();
return root != null ? getPrevPre(conversation, root) : getPrevPost(conversation, root);
}
private BlipView getPrevPre(BlipMetaView parent, AnchorView anchor) {
InlineThreadView contents = anchor.getThread();
return contents != null ? getPrevPre(anchor, contents)
: getPrevPost(anchor.getParent(), anchor);
}
//
// Prev Post.
//
private BlipView getPrevPost(View parent, View child) {
if (parent == null) {
return null;
}
switch (parent.getType()) {
case ANCHOR:
return getPrevPost((AnchorView) parent, (InlineThreadView) child);
case META:
return getPrevPost((BlipMetaView) parent, (AnchorView) child);
case BLIP:
switch (child.getType()) {
case META:
return getPrevPost((BlipView) parent, (BlipMetaView) child);
case ANCHOR:
return getPrevPost((BlipView) parent, (AnchorView) child);
case INLINE_CONVERSATION:
return getPrevPost((BlipView) parent, (InlineConversationView) child);
default:
throw new RuntimeException("unknown blip child type: " + child.getType());
}
case INLINE_THREAD:
return getPrevPost((ThreadView) parent, (BlipView) child);
case ROOT_THREAD:
return getPrevPost((ThreadView) parent, (BlipView) child);
case INLINE_CONVERSATION:
return getPrevPost((InlineConversationView) parent, (RootThreadView) child);
case ROOT_CONVERSATION:
return getPrevPost((TopConversationView) parent, (RootThreadView) child);
default:
throw new RuntimeException("unknown parent type: " + parent.getType());
}
}
private BlipView getPrevPost(InlineConversationView parent, RootThreadView child) {
return getPrevPost(parent.getParent(), parent);
}
private BlipView getPrevPost(TopConversationView parent, RootThreadView child) {
return null;
}
private BlipView getPrevPost(BlipView parent, AnchorView child) {
AnchorView prev = parent.getDefaultAnchorBefore(child);
BlipMetaView meta;
return prev != null ? getPrevPre(parent, prev) // \u2620
: ((meta = parent.getMeta()) != null) // \u2620
? getPrevPre(parent, meta) // \u2620
: getPrevPost(parent, meta);
}
private BlipView getPrevPost(BlipView parent, BlipMetaView child) {
return parent;
}
private BlipView getPrevPost(BlipView parent, InlineConversationView child) {
InlineConversationView prev = parent.getConversationBefore(child);
return prev != null ? getPrevPre(parent, prev) : getPrevPost(parent, (AnchorView) null);
}
private BlipView getPrevPost(BlipMetaView parent, AnchorView child) {
AnchorView prev = parent.getInlineAnchorBefore(child);
return prev != null ? getPrevPre(parent, prev) : getPrevPost(parent.getParent(), parent);
}
private BlipView getPrevPost(ThreadView parent, BlipView child) {
BlipView prev = parent.getBlipBefore(child);
return prev != null ? getPrevPre(parent, prev) : getPrevPost(parent.getParent(), parent);
}
private BlipView getPrevPost(AnchorView parent, InlineThreadView child) {
return getPrevPost(parent.getParent(), parent);
}
}