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_widget.h"
29 #include "gx_single_line_text_input.h"
30 #include "gx_text_input_cursor.h"
31 #include "gx_utility.h"
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _gx_single_line_text_input_mark_next PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Kenneth Maxwell, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function highlights the character after the end mark position. */
46 /* */
47 /* INPUT */
48 /* */
49 /* text_input Single-line text input widget */
50 /* control block */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* None */
55 /* */
56 /* CALLS */
57 /* */
58 /* _gx_widget_border_width_get Get the widget border width */
59 /* _gx_widget_client_get Get widget client rectangle */
60 /* _gx_widget_font_get Retrieve font associate with */
61 /* specified font id */
62 /* _gx_system_string_width_get Get the width of a string */
63 /* _gx_system_dirty_partial_add Mark the specified area of */
64 /* a widget as dirty */
65 /* _gx_text_input_cursor_dirty_rectangle_get */
66 /* Get cursor rectangle */
67 /* _gx_utility_utf8_string_character_get Parse utf8 string to */
68 /* multi-byte glyph */
69 /* */
70 /* CALLED BY */
71 /* */
72 /* GUIX Internal Code */
73 /* */
74 /* RELEASE HISTORY */
75 /* */
76 /* DATE NAME DESCRIPTION */
77 /* */
78 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
79 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
80 /* resulting in version 6.1 */
81 /* */
82 /**************************************************************************/
_gx_single_line_text_input_mark_next(GX_SINGLE_LINE_TEXT_INPUT * text_input)83 UINT _gx_single_line_text_input_mark_next(GX_SINGLE_LINE_TEXT_INPUT *text_input)
84 {
85 GX_TEXT_INPUT_CURSOR *cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance;
86 GX_CHAR *string_buffer = text_input -> gx_single_line_text_input_buffer;
87 UINT string_size = text_input -> gx_single_line_text_input_string_size;
88 GX_VALUE width;
89 GX_FONT *gx_font;
90 GX_RECTANGLE client;
91 GX_RECTANGLE cursor_rect;
92 UINT glyph_len = 1;
93 INT new_cursor_pos;
94 GX_BOOL mark_all = GX_FALSE;
95 UINT start_mark = text_input -> gx_single_line_text_input_start_mark;
96 UINT end_mark = text_input -> gx_single_line_text_input_end_mark;
97 GX_STRING string;
98
99
100 if (start_mark == end_mark)
101 {
102 start_mark = text_input -> gx_single_line_text_input_insert_pos;
103 end_mark = text_input -> gx_single_line_text_input_insert_pos;
104
105 text_input -> gx_single_line_text_input_start_mark = start_mark;
106 text_input -> gx_single_line_text_input_end_mark = end_mark;
107 }
108
109 if (end_mark < string_size)
110 {
111 #ifdef GX_UTF8_SUPPORT
112 /* Calculate glyph length of the characgter after the end mark. */
113 string.gx_string_ptr = string_buffer + end_mark;
114 string.gx_string_length = string_size - end_mark;
115 _gx_utility_utf8_string_character_get(&string, GX_NULL, &glyph_len);
116 #endif
117
118 /* Update end mark. */
119 text_input -> gx_single_line_text_input_end_mark += glyph_len;
120
121 /* Update insert position. */
122 text_input -> gx_single_line_text_input_insert_pos += glyph_len;
123
124 /* Get widget border. */
125 _gx_widget_border_width_get((GX_WIDGET *)text_input, &width);
126
127 /* Get client rectangle. */
128 _gx_widget_client_get((GX_WIDGET *)text_input, width, &client);
129
130 /* Pickup text font. */
131 _gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_prompt_font_id, &gx_font);
132
133 /* Get the glyph width after the end mark. */
134 string.gx_string_ptr = string_buffer + end_mark;
135 string.gx_string_length = glyph_len;
136 _gx_system_string_width_get_ext(gx_font, &string, &width);
137
138 /* Calculate new cursor position. */
139 new_cursor_pos = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x + width);
140
141 switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK)
142 {
143 case GX_STYLE_TEXT_CENTER:
144 break;
145
146 case GX_STYLE_TEXT_RIGHT:
147 case GX_STYLE_TEXT_LEFT:
148 default:
149 if (new_cursor_pos > client.gx_rectangle_right - 1)
150 {
151 /* The next marked character is out of client area, update x offset. */
152 text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset +
153 new_cursor_pos - client.gx_rectangle_right + 1);
154
155 new_cursor_pos = (GX_VALUE)(client.gx_rectangle_right - 1);
156
157 /* Should mark all widget as dirty. */
158 mark_all = GX_TRUE;
159 }
160 else if (new_cursor_pos < client.gx_rectangle_left + 1)
161 {
162 /* Update text input x offset. */
163 text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset -
164 client.gx_rectangle_left - 1 + new_cursor_pos);
165 new_cursor_pos = (GX_VALUE)(client.gx_rectangle_left + 1);
166
167 mark_all = GX_TRUE;
168 }
169 break;
170 }
171
172 if (!mark_all)
173 {
174 /* Only need to mark area between old and new end mark as dirty. */
175 client.gx_rectangle_left = cursor_ptr -> gx_text_input_cursor_pos.gx_point_x;
176 client.gx_rectangle_right = (GX_VALUE)(new_cursor_pos - 1);
177
178 if (start_mark == end_mark)
179 {
180 /* Get old cursor rectangle. */
181 _gx_text_input_cursor_dirty_rectangle_get(cursor_ptr, &cursor_rect);
182
183 /* Combine with old cursor rectangle. */
184 _gx_utility_rectangle_combine(&client, &cursor_rect);
185 }
186 }
187
188 cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)new_cursor_pos;
189
190 _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client);
191 }
192 return GX_SUCCESS;
193 }
194
195
