1 /***************************************************************************
2 * Copyright (c) 2024 Microsoft Corporation
3 *
4 * This program and the accompanying materials are made available under the
5 * terms of the MIT License which is available at
6 * https://opensource.org/licenses/MIT.
7 *
8 * SPDX-License-Identifier: MIT
9 **************************************************************************/
10
11
12 /**************************************************************************/
13 /**************************************************************************/
14 /** */
15 /** GUIX Component */
16 /** */
17 /** System Management (System) */
18 /** */
19 /**************************************************************************/
20
21 #define GX_SOURCE_CODE
22
23
24 /* Include necessary system files. */
25
26 #include "gx_api.h"
27 #include "gx_system.h"
28 #include "gx_utility.h"
29
30
31 /**************************************************************************/
32 /* */
33 /* FUNCTION RELEASE */
34 /* */
35 /* _gx_system_view_split PORTABLE C */
36 /* 6.1 */
37 /* AUTHOR */
38 /* */
39 /* Kenneth Maxwell, Microsoft Corporation */
40 /* */
41 /* DESCRIPTION */
42 /* */
43 /* This splits a rectangle into over and under views */
44 /* */
45 /* INPUT */
46 /* */
47 /* over Pointer to window on top */
48 /* root Pointer to root window */
49 /* original Rectangle to split into */
50 /* smaller chunks */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* None */
55 /* */
56 /* CALLS */
57 /* */
58 /* gx_system_root_view_add Add viewport to root window */
59 /* */
60 /* CALLED BY */
61 /* */
62 /* _gx_system_root_view_add Add view to a root window */
63 /* */
64 /* RELEASE HISTORY */
65 /* */
66 /* DATE NAME DESCRIPTION */
67 /* */
68 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
69 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
70 /* resulting in version 6.1 */
71 /* */
72 /**************************************************************************/
73
_gx_system_view_split(GX_WINDOW * over,GX_WINDOW_ROOT * root,GX_RECTANGLE * original)74 VOID _gx_system_view_split(GX_WINDOW *over, GX_WINDOW_ROOT *root, GX_RECTANGLE *original)
75 {
76 GX_RECTANGLE split;
77 GX_RECTANGLE oversize = over -> gx_widget_size;
78
79 /* check to see if any area on top is exposed */
80 if (oversize.gx_rectangle_top > original -> gx_rectangle_top)
81 {
82 split.gx_rectangle_left = original -> gx_rectangle_left;
83 split.gx_rectangle_right = original -> gx_rectangle_right;
84 split.gx_rectangle_top = original -> gx_rectangle_top;
85 split.gx_rectangle_bottom = (GX_VALUE)(oversize.gx_rectangle_top - 1);
86
87 /* try to add this piece to the 'under' window's viewports */
88 _gx_system_root_view_add(root, &split);
89 }
90
91 /* check to see if any area on bottom is exposed */
92 if (oversize.gx_rectangle_bottom < original -> gx_rectangle_bottom)
93 {
94 split.gx_rectangle_left = original -> gx_rectangle_left;
95 split.gx_rectangle_right = original -> gx_rectangle_right;
96 split.gx_rectangle_top = (GX_VALUE)(oversize.gx_rectangle_bottom + 1);
97 split.gx_rectangle_bottom = original -> gx_rectangle_bottom;
98
99 /* try to add this piece to the 'under' window's viewports */
100 _gx_system_root_view_add(root, &split);
101 }
102
103 /* check to see if any area on left is exposed */
104 if (oversize.gx_rectangle_left > original -> gx_rectangle_left)
105 {
106 split.gx_rectangle_left = original -> gx_rectangle_left;
107 split.gx_rectangle_right = (GX_VALUE)(oversize.gx_rectangle_left - 1);
108
109 if (original -> gx_rectangle_top > oversize.gx_rectangle_top)
110 {
111 split.gx_rectangle_top = original -> gx_rectangle_top;
112 }
113 else
114 {
115 split.gx_rectangle_top = oversize.gx_rectangle_top;
116 }
117
118 if (original -> gx_rectangle_bottom < oversize.gx_rectangle_bottom)
119 {
120 split.gx_rectangle_bottom = original -> gx_rectangle_bottom;
121 }
122 else
123 {
124 split.gx_rectangle_bottom = oversize.gx_rectangle_bottom;
125 }
126
127 /* try to add this piece to the 'under' window's viewports */
128 _gx_system_root_view_add(root, &split);
129 }
130
131 /* check to see if any area on right is exposed */
132 if (oversize.gx_rectangle_right < original -> gx_rectangle_right)
133 {
134 split.gx_rectangle_left = (GX_VALUE)(oversize.gx_rectangle_right + 1);
135 split.gx_rectangle_right = original -> gx_rectangle_right;
136
137 if (original -> gx_rectangle_top > oversize.gx_rectangle_top)
138 {
139 split.gx_rectangle_top = original -> gx_rectangle_top;
140 }
141 else
142 {
143 split.gx_rectangle_top = oversize.gx_rectangle_top;
144 }
145
146 if (original -> gx_rectangle_bottom < oversize.gx_rectangle_bottom)
147 {
148 split.gx_rectangle_bottom = original -> gx_rectangle_bottom;
149 }
150 else
151 {
152 split.gx_rectangle_bottom = oversize.gx_rectangle_bottom;
153 }
154 /* try to add this piece to the 'under' window's viewports */
155 _gx_system_root_view_add(root, &split);
156 }
157 }
158
159
