1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Eclipse Public License, Version 1.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.eclipse.org/org/documents/epl-v10.php 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.ide.common.api; 18 19 import com.android.annotations.NonNull; 20 import com.android.annotations.Nullable; 21 import com.google.common.annotations.Beta; 22 23 /** A segment type describes the different roles or positions a segment can have in a node 24 * <p> 25 * <b>NOTE: This is not a public or final API; if you rely on this be prepared 26 * to adjust your code for the next tools release.</b> 27 */ 28 @Beta 29 public enum SegmentType { 30 LEFT, TOP, RIGHT, BOTTOM, BASELINE, CENTER_VERTICAL, CENTER_HORIZONTAL, UNKNOWN; 31 isHorizontal()32 public boolean isHorizontal() { 33 return this == TOP || this == BOTTOM || this == BASELINE || this == CENTER_HORIZONTAL; 34 } 35 36 /** 37 * Returns the X coordinate for an edge of this type given its bounds 38 * 39 * @param node the node containing the edge 40 * @param bounds the bounds of the node 41 * @return the X coordinate for an edge of this type given its bounds 42 */ getX(@ullable INode node, @NonNull Rect bounds)43 public int getX(@Nullable INode node, @NonNull Rect bounds) { 44 // We pass in the bounds rather than look it up via node.getBounds() because 45 // during a resize or move operation, we call this method to look up proposed 46 // bounds rather than actual bounds 47 switch (this) { 48 case RIGHT: 49 return bounds.x + bounds.w; 50 case TOP: 51 case BOTTOM: 52 case CENTER_VERTICAL: 53 return bounds.x + bounds.w / 2; 54 case UNKNOWN: 55 assert false; 56 return bounds.x; 57 case LEFT: 58 case BASELINE: 59 default: 60 return bounds.x; 61 } 62 } 63 64 /** 65 * Returns the Y coordinate for an edge of this type given its bounds 66 * 67 * @param node the node containing the edge 68 * @param bounds the bounds of the node 69 * @return the Y coordinate for an edge of this type given its bounds 70 */ getY(@ullable INode node, @NonNull Rect bounds)71 public int getY(@Nullable INode node, @NonNull Rect bounds) { 72 switch (this) { 73 case TOP: 74 return bounds.y; 75 case BOTTOM: 76 return bounds.y + bounds.h; 77 case BASELINE: { 78 int baseline = node != null ? node.getBaseline() : -1; 79 if (node == null) { 80 // This happens when you are dragging an element and we don't have 81 // a node (only an IDragElement) such as on a palette drag. 82 // For now just hack it. 83 baseline = (int) (bounds.h * 0.8f); // HACK 84 } 85 return bounds.y + baseline; 86 } 87 case UNKNOWN: 88 assert false; 89 return bounds.y; 90 case RIGHT: 91 case LEFT: 92 case CENTER_HORIZONTAL: 93 default: 94 return bounds.y + bounds.h / 2; 95 } 96 } 97 98 @Override toString()99 public String toString() { 100 return name(); 101 } 102 } 103