ScrollStyles.h (1307B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef mozilla_ScrollStyles_h 8 #define mozilla_ScrollStyles_h 9 10 #include <stdint.h> 11 12 // Forward declarations 13 struct nsStyleDisplay; 14 15 namespace mozilla { 16 17 enum class StyleOverflow : uint8_t; 18 19 struct ScrollStyles { 20 // Always one of Scroll, Hidden, or Auto. 21 StyleOverflow mHorizontal; 22 StyleOverflow mVertical; 23 24 ScrollStyles(StyleOverflow aH, StyleOverflow aV); 25 26 // NOTE: This ctor maps `visible` to `auto` and `clip` to `hidden`. 27 // It's used for styles that are propagated from the <body> and for 28 // scroll frames (which we create also for overflow:clip/visible in 29 // some cases, e.g. form controls). 30 enum MapOverflowToValidScrollStyleTag { MapOverflowToValidScrollStyle }; 31 ScrollStyles(const nsStyleDisplay&, MapOverflowToValidScrollStyleTag); 32 33 bool operator==(const ScrollStyles&) const = default; 34 bool operator!=(const ScrollStyles&) const = default; 35 36 bool IsHiddenInBothDirections() const; 37 }; 38 39 } // namespace mozilla 40 41 #endif // mozilla_ScrollStyles_h