1 /*
2 * Copyright (C) 2024 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
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 #pragma once
18
19 /**
20 * Stores the edge that will be extended
21 */
22 namespace android {
23
24 enum CanonicalDirections { NONE = 0, LEFT = 1, RIGHT = 2, TOP = 4, BOTTOM = 8 };
25
to_string(CanonicalDirections direction)26 inline std::string to_string(CanonicalDirections direction) {
27 switch (direction) {
28 case LEFT:
29 return "LEFT";
30 case RIGHT:
31 return "RIGHT";
32 case TOP:
33 return "TOP";
34 case BOTTOM:
35 return "BOTTOM";
36 case NONE:
37 return "NONE";
38 }
39 }
40
41 struct EdgeExtensionEffect {
EdgeExtensionEffectEdgeExtensionEffect42 EdgeExtensionEffect(bool left, bool right, bool top, bool bottom) {
43 extensionEdges = NONE;
44 if (left) {
45 extensionEdges |= LEFT;
46 }
47 if (right) {
48 extensionEdges |= RIGHT;
49 }
50 if (top) {
51 extensionEdges |= TOP;
52 }
53 if (bottom) {
54 extensionEdges |= BOTTOM;
55 }
56 }
57
EdgeExtensionEffectEdgeExtensionEffect58 EdgeExtensionEffect() { EdgeExtensionEffect(false, false, false, false); }
59
extendsEdgeEdgeExtensionEffect60 bool extendsEdge(CanonicalDirections edge) const { return extensionEdges & edge; }
61
hasEffectEdgeExtensionEffect62 bool hasEffect() const { return extensionEdges != NONE; };
63
resetEdgeExtensionEffect64 void reset() { extensionEdges = NONE; }
65
66 bool operator==(const EdgeExtensionEffect& other) const {
67 return extensionEdges == other.extensionEdges;
68 }
69
70 bool operator!=(const EdgeExtensionEffect& other) const { return !(*this == other); }
71
72 private:
73 int extensionEdges;
74 };
75
to_string(const EdgeExtensionEffect & effect)76 inline std::string to_string(const EdgeExtensionEffect& effect) {
77 std::string s = "EdgeExtensionEffect={edges=[";
78 if (effect.hasEffect()) {
79 for (CanonicalDirections edge : {LEFT, RIGHT, TOP, BOTTOM}) {
80 if (effect.extendsEdge(edge)) {
81 s += to_string(edge) + ", ";
82 }
83 }
84 } else {
85 s += to_string(NONE);
86 }
87 s += "]}";
88 return s;
89 }
90
91 inline std::ostream& operator<<(std::ostream& os, const EdgeExtensionEffect effect) {
92 os << to_string(effect);
93 return os;
94 }
95 } // namespace android
96