| /* |
| * Copyright (C) 2015 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.android.tools.idea.uibuilder.model; |
| |
| /** |
| * A {@link MarginType} indicates whether a {@link Segment} corresponds to the visual edge |
| * of the node, or whether it is offset by a margin in the edge's direction, or whether |
| * it's both (which is the case when the margin is 0). |
| * <p/> |
| * We need to keep track of the distinction because different constraints apply |
| * differently w.r.t. margins. Let's say you have a target node with a 50 dp margin in all |
| * directions. If you layout_alignTop with this node, the match will be on the visual |
| * bounds of the target node (ignoring the margin). If you layout_above this node, you |
| * will be offset by the margin on the target node. Therefore, we have to add <b>both</b> |
| * edges (the bounds of the target node with and without edges) and check for matches on |
| * each edge depending on the constraint being considered. |
| */ |
| public enum MarginType { |
| /** |
| * This margin type is used for nodes that have margins, and this segment includes the |
| * margin distance |
| */ |
| WITH_MARGIN, |
| |
| /** |
| * This margin type is used for nodes that have margins, and this segment does not |
| * include the margin distance |
| */ |
| WITHOUT_MARGIN, |
| |
| /** |
| * This margin type is used for nodes that do not have margins, so margin edges and |
| * non-margin edges are the same |
| */ |
| NO_MARGIN |
| } |