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 /** Text Input Management (Single Line Text Input) */
18 /** */
19 /**************************************************************************/
20
21 #define GX_SOURCE_CODE
22
23
24 /* Include necessary system files. */
25
26 #include "gx_api.h"
27 #include "gx_context.h"
28 #include "gx_system.h"
29 #include "gx_widget.h"
30 #include "gx_single_line_text_input.h"
31
32 /**************************************************************************/
33 /* */
34 /* FUNCTION RELEASE */
35 /* */
36 /* _gx_single_line_text_input_draw_position_get PORTABLE C */
37 /* 6.1 */
38 /* AUTHOR */
39 /* */
40 /* Kenneth Maxwell, Microsoft Corporation */
41 /* */
42 /* DESCRIPTION */
43 /* */
44 /* This service calculates draw start position of text input text. */
45 /* */
46 /* INPUT */
47 /* */
48 /* text_input Single-line text input widget */
49 /* control block. */
50 /* */
51 /* OUTPUT */
52 /* */
53 /* None */
54 /* */
55 /* CALLS */
56 /* */
57 /* _gx_context_brush_get Get brush of current context */
58 /* _gx_widget_border_width_get Get widget border width */
59 /* _gx_widget_client_get Get widget client rectangle */
60 /* _gx_system_string_width_get Get the width of a string */
61 /* _gx_single_line_text_input_position_update */
62 /* Update cursor position by */
63 /* insert index */
64 /* */
65 /* */
66 /* CALLED BY */
67 /* */
68 /* _gx_single_line_text_input_draw */
69 /* */
70 /* RELEASE HISTORY */
71 /* */
72 /* DATE NAME DESCRIPTION */
73 /* */
74 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
75 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
76 /* resulting in version 6.1 */
77 /* */
78 /**************************************************************************/
_gx_single_line_text_input_draw_position_get(GX_SINGLE_LINE_TEXT_INPUT * text_input,GX_VALUE * xpos,GX_VALUE * ypos)79 UINT _gx_single_line_text_input_draw_position_get(GX_SINGLE_LINE_TEXT_INPUT *text_input, GX_VALUE *xpos, GX_VALUE *ypos)
80 {
81 GX_VALUE border_width;
82 UINT text_height;
83 GX_VALUE text_width;
84 GX_VALUE client_height;
85 GX_VALUE client_width;
86 GX_VALUE x_pos;
87 GX_VALUE y_pos;
88 GX_RECTANGLE client;
89 GX_BRUSH *brush;
90 GX_BOOL update_cursor_pos;
91 GX_STRING string;
92
93 _gx_context_brush_get(&brush);
94
95 if (brush -> gx_brush_font == GX_NULL)
96 {
97 return(GX_FAILURE);
98 }
99
100 if (text_input -> gx_widget_style & GX_STYLE_CURSOR_ALWAYS)
101 {
102 update_cursor_pos = GX_TRUE;
103 }
104 else
105 {
106 update_cursor_pos = GX_FALSE;
107 }
108
109 /* Pickup widget width. */
110 _gx_widget_border_width_get((GX_WIDGET *)text_input, &border_width);
111
112 _gx_widget_client_get((GX_WIDGET *)text_input, border_width, &client);
113
114 client_width = (GX_VALUE)(client.gx_rectangle_right - client.gx_rectangle_left + 1);
115 client_height = (GX_VALUE)(client.gx_rectangle_bottom - client.gx_rectangle_top + 1);
116
117
118 text_height = brush -> gx_brush_font -> gx_font_line_height;
119 string.gx_string_ptr = text_input -> gx_single_line_text_input_buffer;
120 string.gx_string_length = text_input -> gx_single_line_text_input_string_size;
121 _gx_system_string_width_get_ext(brush -> gx_brush_font, &string, &text_width);
122
123 switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK)
124 {
125 case GX_STYLE_TEXT_RIGHT:
126 x_pos = (GX_VALUE)(client.gx_rectangle_right - 1);
127
128 x_pos = (GX_VALUE)(x_pos - text_input -> gx_single_line_text_input_xoffset);
129
130 if (text_width < (client_width - 3))
131 {
132 /* Text width is shorter than client width. */
133 if (text_input -> gx_single_line_text_input_xoffset != text_width)
134 {
135 /* If xoffset is not equal to text width,
136 reset xoffset and update cursor position. */
137 text_input -> gx_single_line_text_input_xoffset = text_width;
138 update_cursor_pos = GX_TRUE;
139 }
140 }
141 else if (x_pos > client.gx_rectangle_left + 1)
142 {
143 /* If text start/end position is inside client area,
144 reset xoffset value and update cursor position. */
145 text_input -> gx_single_line_text_input_xoffset = text_width;
146 update_cursor_pos = GX_TRUE;
147 }
148
149 x_pos = (GX_VALUE)(client.gx_rectangle_right - 1);
150 break;
151
152 case GX_STYLE_TEXT_CENTER:
153 x_pos = (GX_VALUE)(client.gx_rectangle_left + 1 + (client_width >> 1));
154 x_pos = (GX_VALUE)(x_pos - text_input -> gx_single_line_text_input_xoffset);
155
156 if (text_width < (client_width - 3))
157 {
158 /* Text width is shorter than client width. */
159 if (text_input -> gx_single_line_text_input_xoffset != ((text_width + 1) >> 1))
160 {
161 /* If xoffset is not equal to 0,
162 reset xoffset value and update cursor position. */
163 text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)((text_width + 1) >> 1);
164 update_cursor_pos = GX_TRUE;
165 }
166 }
167 else if ((x_pos > client.gx_rectangle_left + 1) ||
168 (x_pos + text_width < client.gx_rectangle_right - 1))
169 {
170 /* If text start/end position is inside client area,
171 reset xoffset value and update cursor position. */
172 text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)((text_width + 1) >> 1);
173 update_cursor_pos = GX_TRUE;
174 }
175 x_pos = (GX_VALUE)(client.gx_rectangle_left + 1 + (client_width >> 1));
176 break;
177
178 case GX_STYLE_TEXT_LEFT:
179 default:
180 x_pos = (GX_VALUE)(client.gx_rectangle_left + 1);
181
182 x_pos = (GX_VALUE)(x_pos - text_input -> gx_single_line_text_input_xoffset);
183
184 if (text_width < (client_width - 3))
185 {
186 /* Text width is shorter than client width. */
187 if (text_input -> gx_single_line_text_input_xoffset != 0)
188 {
189 /* If xoffset is not equal to 0,
190 reset xoffset value and update cursor position. */
191 text_input -> gx_single_line_text_input_xoffset = 0;
192 update_cursor_pos = GX_TRUE;
193 }
194 }
195 else if (x_pos + text_width < client.gx_rectangle_right - 1)
196 {
197 /* If text start/end position is inside client area,
198 reset xoffset value and update cursor position. */
199 text_input -> gx_single_line_text_input_xoffset = 0;
200 update_cursor_pos = GX_TRUE;
201 }
202
203 x_pos = (GX_VALUE)(client.gx_rectangle_left + 1);
204 break;
205 }
206
207 if (update_cursor_pos)
208 {
209 _gx_single_line_text_input_position_update(text_input);
210 }
211
212 x_pos = (GX_VALUE)(x_pos - text_input -> gx_single_line_text_input_xoffset);
213
214 y_pos = (GX_VALUE)(text_input -> gx_widget_size.gx_rectangle_top + border_width);
215 y_pos = (GX_VALUE)(y_pos - text_input -> gx_single_line_text_input_yoffset);
216 y_pos = (GX_VALUE)(y_pos + (GX_VALUE)(((INT)client_height - (INT)text_height) >> 1));
217
218 *xpos = x_pos;
219 *ypos = y_pos;
220
221 return GX_SUCCESS;
222 }
223
224
