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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_BASE_HIT_TEST_H_
#define UI_BASE_HIT_TEST_H_
#include "build/build_config.h"
#if BUILDFLAG(IS_WIN)
// Define the HT* values so that this header can be included whether or not
// windows.h has been included. The definitions must exactly match to avoid
// redefinition errors when compiling source files which also include windows.h.
// Those source files conveniently provide a check that these values match.
// windows.h is not included here because of the namespace pollution it causes.
#define HTERROR (-2)
#define HTTRANSPARENT (-1)
#define HTNOWHERE 0
#define HTCLIENT 1
#define HTCAPTION 2
#define HTSYSMENU 3
#define HTGROWBOX 4
#define HTSIZE HTGROWBOX
#define HTMENU 5
#define HTHSCROLL 6
#define HTVSCROLL 7
#define HTMINBUTTON 8
#define HTMAXBUTTON 9
#define HTLEFT 10
#define HTRIGHT 11
#define HTTOP 12
#define HTTOPLEFT 13
#define HTTOPRIGHT 14
#define HTBOTTOM 15
#define HTBOTTOMLEFT 16
#define HTBOTTOMRIGHT 17
#define HTBORDER 18
#define HTREDUCE HTMINBUTTON
#define HTZOOM HTMAXBUTTON
#define HTSIZEFIRST HTLEFT
#define HTSIZELAST HTBOTTOMRIGHT
#define HTOBJECT 19
#define HTCLOSE 20
#define HTHELP 21
#else
// Defines the same symbolic names used by the WM_NCHITTEST Notification under
// win32 (the integer values are guaranteed to be equivalent). We do this
// because we have a whole bunch of code that deals with window resizing and
// such that requires these values.
enum HitTestCompat {
HTNOWHERE = 0,
HTBORDER = 18,
HTBOTTOM = 15,
HTBOTTOMLEFT = 16,
HTBOTTOMRIGHT = 17,
HTCAPTION = 2,
HTCLIENT = 1,
HTCLOSE = 20,
HTERROR = -2,
HTGROWBOX = 4,
HTHELP = 21,
HTHSCROLL = 6,
HTLEFT = 10,
HTMENU = 5,
HTMAXBUTTON = 9,
HTMINBUTTON = 8,
HTREDUCE = HTMINBUTTON,
HTRIGHT = 11,
HTSIZE = HTGROWBOX,
HTSYSMENU = 3,
HTTOP = 12,
HTTOPLEFT = 13,
HTTOPRIGHT = 14,
HTTRANSPARENT = -1,
HTVSCROLL = 7,
HTZOOM = HTMAXBUTTON
};
#endif // BUILDFLAG(IS_WIN)
namespace ui {
// Returns true if the |component| is for resizing, like HTTOP or HTBOTTOM.
bool IsResizingComponent(int component);
// Returns true if the |component| is HTCAPTION or one of the resizing
// components.
bool CanPerformDragOrResize(int component);
} // namespace ui
#endif // UI_BASE_HIT_TEST_H_
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