| // Copyright (C) 2013 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.diff; |
| |
| import com.google.gwt.dom.client.Element; |
| import com.google.gwt.dom.client.Style.Unit; |
| import com.google.gwt.user.client.DOM; |
| import com.google.gwt.user.client.Timer; |
| import java.util.PriorityQueue; |
| import net.codemirror.lib.CodeMirror; |
| |
| /** |
| * LineWidget attached to a CodeMirror container. |
| * |
| * <p>When a comment is placed on a line a CommentWidget is created on both sides. The group tracks |
| * all comment boxes on that same line, and also includes an empty padding element to keep |
| * subsequent lines vertically aligned. |
| */ |
| class SideBySideCommentGroup extends CommentGroup implements Comparable<SideBySideCommentGroup> { |
| static void pair(SideBySideCommentGroup a, SideBySideCommentGroup b) { |
| a.peers.add(b); |
| b.peers.add(a); |
| } |
| |
| private final Element padding; |
| private final PriorityQueue<SideBySideCommentGroup> peers; |
| |
| SideBySideCommentGroup( |
| SideBySideCommentManager manager, CodeMirror cm, DisplaySide side, int line) { |
| super(manager, cm, side, line); |
| |
| padding = DOM.createDiv(); |
| padding.setClassName(SideBySideTable.style.padding()); |
| SideBySideChunkManager.focusOnClick(padding, cm.side()); |
| getElement().appendChild(padding); |
| peers = new PriorityQueue<>(); |
| } |
| |
| SideBySideCommentGroup getPeer() { |
| return peers.peek(); |
| } |
| |
| @Override |
| void remove(DraftBox box) { |
| super.remove(box); |
| |
| if (getBoxCount() == 0 && peers.size() == 1 && peers.peek().peers.size() > 1) { |
| SideBySideCommentGroup peer = peers.peek(); |
| peer.peers.remove(this); |
| detach(); |
| if (peer.getBoxCount() == 0 |
| && peer.peers.size() == 1 |
| && peer.peers.peek().getBoxCount() == 0) { |
| peer.detach(); |
| } else { |
| peer.resize(); |
| } |
| } else { |
| resize(); |
| } |
| } |
| |
| @Override |
| void init(DiffTable parent) { |
| if (getLineWidget() == null) { |
| attach(parent); |
| } |
| for (CommentGroup peer : peers) { |
| if (peer.getLineWidget() == null) { |
| peer.attach(parent); |
| } |
| } |
| } |
| |
| @Override |
| void handleRedraw() { |
| getLineWidget() |
| .onRedraw( |
| () -> { |
| if (canComputeHeight() && peers.peek().canComputeHeight()) { |
| if (getResizeTimer() != null) { |
| getResizeTimer().cancel(); |
| setResizeTimer(null); |
| } |
| adjustPadding(SideBySideCommentGroup.this, peers.peek()); |
| } else if (getResizeTimer() == null) { |
| setResizeTimer( |
| new Timer() { |
| @Override |
| public void run() { |
| if (canComputeHeight() && peers.peek().canComputeHeight()) { |
| cancel(); |
| setResizeTimer(null); |
| adjustPadding(SideBySideCommentGroup.this, peers.peek()); |
| } |
| } |
| }); |
| getResizeTimer().scheduleRepeating(5); |
| } |
| }); |
| } |
| |
| @Override |
| void resize() { |
| if (getLineWidget() != null) { |
| adjustPadding(this, peers.peek()); |
| } |
| } |
| |
| private int computeHeight() { |
| if (getComments().isVisible()) { |
| // Include margin-bottom: 5px from CSS class. |
| return getComments().getOffsetHeight() + 5; |
| } |
| return 0; |
| } |
| |
| private static void adjustPadding(SideBySideCommentGroup a, SideBySideCommentGroup b) { |
| int apx = a.computeHeight(); |
| int bpx = b.computeHeight(); |
| for (SideBySideCommentGroup otherPeer : a.peers) { |
| if (otherPeer != b) { |
| bpx += otherPeer.computeHeight(); |
| } |
| } |
| for (SideBySideCommentGroup otherPeer : b.peers) { |
| if (otherPeer != a) { |
| apx += otherPeer.computeHeight(); |
| } |
| } |
| int h = Math.max(apx, bpx); |
| a.padding.getStyle().setHeight(Math.max(0, h - apx), Unit.PX); |
| b.padding.getStyle().setHeight(Math.max(0, h - bpx), Unit.PX); |
| a.getLineWidget().changed(); |
| b.getLineWidget().changed(); |
| a.updateSelection(); |
| b.updateSelection(); |
| } |
| |
| @Override |
| public int compareTo(SideBySideCommentGroup o) { |
| if (side == o.side) { |
| return line - o.line; |
| } |
| throw new IllegalStateException("Cannot compare SideBySideCommentGroup with different sides"); |
| } |
| } |