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_system.h"
28 #include "gx_display.h"
29 #include "gx_context.h"
30 #include "gx_widget.h"
31 #include "gx_single_line_text_input.h"
32 #include "gx_text_input_cursor.h"
33
34 /**************************************************************************/
35 /* */
36 /* FUNCTION RELEASE */
37 /* */
38 /* _gx_single_line_text_input_mark_home PORTABLE C */
39 /* 6.1 */
40 /* AUTHOR */
41 /* */
42 /* Kenneth Maxwell, Microsoft Corporation */
43 /* */
44 /* DESCRIPTION */
45 /* */
46 /* This service moves the end mark position to the start of the input */
47 /* string. */
48 /* */
49 /* INPUT */
50 /* */
51 /* text_input Single-line text input widget */
52 /* control block */
53 /* */
54 /* OUTPUT */
55 /* */
56 /* None */
57 /* */
58 /* CALLS */
59 /* */
60 /* _gx_widget_font_get Get font by specified ID */
61 /* _gx_widget_border_width_get Get the widget border width */
62 /* _gx_widget_client_get Retrieves client area of the */
63 /* widget */
64 /* _gx_system_string_width_get Get the width of a string */
65 /* _gx_system_dirty_mark Mart the area of the widget */
66 /* dirty */
67 /* _gx_system_dirty_partial_add Mark the partial area of a */
68 /* widget as dirty */
69 /* _gx_single_line_text_input_text_rectangle_get */
70 /* Retrieve text rectangle */
71 /* */
72 /* CALLED BY */
73 /* */
74 /* GUIX Internal Code */
75 /* */
76 /* RELEASE HISTORY */
77 /* */
78 /* DATE NAME DESCRIPTION */
79 /* */
80 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
81 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
82 /* resulting in version 6.1 */
83 /* */
84 /**************************************************************************/
_gx_single_line_text_input_mark_home(GX_SINGLE_LINE_TEXT_INPUT * text_input)85 UINT _gx_single_line_text_input_mark_home(GX_SINGLE_LINE_TEXT_INPUT *text_input)
86 {
87 GX_TEXT_INPUT_CURSOR *cursor_ptr;
88 GX_VALUE border_width;
89 GX_VALUE text_width;
90 GX_RECTANGLE client;
91 GX_FONT *gx_font;
92 GX_VALUE new_xoffset;
93 GX_VALUE new_cursor_pos;
94 UINT start_mark = text_input -> gx_single_line_text_input_start_mark;
95 UINT end_mark = text_input -> gx_single_line_text_input_end_mark;
96 GX_STRING string;
97
98 cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance;
99
100 /* Check if cursor already in the home position. */
101 if (text_input -> gx_single_line_text_input_insert_pos == 0)
102 {
103 return GX_SUCCESS;
104 }
105
106 if (start_mark == end_mark)
107 {
108 /* Set start mark and end mark to current cursor position. */
109 start_mark = text_input -> gx_single_line_text_input_insert_pos;
110 end_mark = text_input -> gx_single_line_text_input_insert_pos;
111
112 text_input -> gx_single_line_text_input_start_mark = start_mark;
113 text_input -> gx_single_line_text_input_end_mark = end_mark;
114 }
115
116 _gx_widget_border_width_get((GX_WIDGET *)text_input, &border_width);
117 _gx_widget_client_get((GX_WIDGET *)text_input, border_width, &client);
118
119 switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK)
120 {
121 case GX_STYLE_TEXT_RIGHT:
122 /* Calculate new x offset. */
123 _gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_prompt_font_id, &gx_font);
124 string.gx_string_ptr = text_input -> gx_single_line_text_input_buffer;
125 string.gx_string_length = text_input -> gx_single_line_text_input_string_size;
126 _gx_system_string_width_get_ext(gx_font, &string, &text_width);
127 new_xoffset = (GX_VALUE)(client.gx_rectangle_right - client.gx_rectangle_left + 1);
128
129 new_xoffset = (GX_VALUE)(new_xoffset - 3);
130
131 if (text_width < new_xoffset)
132 {
133 new_xoffset = text_width;
134 }
135
136 /* Calculate new cursor position. */
137 new_cursor_pos = (GX_VALUE)(client.gx_rectangle_right - 1 - new_xoffset);
138 break;
139
140 case GX_STYLE_TEXT_CENTER:
141 /* Calculate new cursor position. */
142 new_xoffset = 0;
143 new_cursor_pos = (GX_VALUE)(client.gx_rectangle_left + 1 + ((client.gx_rectangle_right - client.gx_rectangle_left + 1) >> 1));
144 new_cursor_pos = (GX_VALUE)(new_cursor_pos - text_input -> gx_single_line_text_input_xoffset);
145 break;
146
147
148 case GX_STYLE_TEXT_LEFT:
149 default:
150 new_xoffset = 0;
151 new_cursor_pos = (GX_VALUE)(client.gx_rectangle_left + 1);
152 break;
153 }
154
155 if (text_input -> gx_single_line_text_input_xoffset != new_xoffset)
156 {
157 /* We need to update x offset, mark whole text input area dirty. */
158 _gx_system_dirty_mark((GX_WIDGET *)text_input);
159 }
160 else
161 {
162 if (start_mark == end_mark)
163 {
164 /* Mark old curosr rectangle as dirty. */
165 _gx_text_input_cursor_dirty_rectangle_get(cursor_ptr, &client);
166 _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client);
167 }
168
169 /* Get bounding rectangle of highlight text. */
170 _gx_single_line_text_input_text_rectangle_get(text_input, (INT)(0 - end_mark), &client);
171
172 /* Mark highlight area as dirty. */
173 _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client);
174 }
175
176 text_input -> gx_single_line_text_input_end_mark = 0;
177
178 /* Update cursor position. */
179 cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = new_cursor_pos;
180
181 /* Update character insert position. */
182 text_input -> gx_single_line_text_input_insert_pos = 0;
183
184 /* Update text input x offset. */
185 text_input -> gx_single_line_text_input_xoffset = new_xoffset;
186
187 return GX_SUCCESS;
188 }
189
190
