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 (Multi 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_multi_line_text_input.h"
30
31 /**************************************************************************/
32 /* */
33 /* FUNCTION RELEASE */
34 /* */
35 /* _gx_multi_line_text_input_text_rectangle_get PORTABLE C */
36 /* 6.1 */
37 /* AUTHOR */
38 /* */
39 /* Kenneth Maxwell, Microsoft Corporation */
40 /* */
41 /* DESCRIPTION */
42 /* */
43 /* This function retrieves the bounding box of specified text. */
44 /* */
45 /* INPUT */
46 /* */
47 /* input Multi-line text input widget */
48 /* control block */
49 /* start_index The start index of the */
50 /* specified text */
51 /* end_index The end index of the */
52 /* specified text */
53 /* rect Retrieved bounding rectangle */
54 /* */
55 /* OUTPUT */
56 /* */
57 /* None */
58 /* */
59 /* CALLS */
60 /* */
61 /* _gx_system_dirty_mark Mark widget as drity */
62 /* */
63 /* RELEASE HISTORY */
64 /* */
65 /* DATE NAME DESCRIPTION */
66 /* */
67 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
68 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
69 /* resulting in version 6.1 */
70 /* */
71 /**************************************************************************/
_gx_multi_line_text_input_highlight_rectangle_get(GX_MULTI_LINE_TEXT_INPUT * input,GX_RECTANGLE * rect)72 UINT _gx_multi_line_text_input_highlight_rectangle_get(GX_MULTI_LINE_TEXT_INPUT *input, GX_RECTANGLE *rect)
73 {
74 GX_TEXT_INPUT_CURSOR *cursor_ptr = &input -> gx_multi_line_text_input_cursor_instance;
75 INT line_height;
76 INT first_visible_line;
77 INT last_visible_line;
78 INT line_cache_start;
79 UINT *line_index = input -> gx_multi_line_text_view_line_index;
80 GX_FONT *font;
81 GX_POINT start_pos;
82 GX_POINT end_pos;
83 UINT cursor_line;
84
85 _gx_widget_font_get((GX_WIDGET *)input, input -> gx_multi_line_text_view_font_id, &font);
86
87 if (!font)
88 {
89 return GX_FAILURE;
90 }
91
92 /* Pickup text height. */
93 line_height = font -> gx_font_line_height + input -> gx_multi_line_text_view_line_space;
94
95 if (!line_height)
96 {
97 return GX_FAILURE;
98 }
99
100 first_visible_line = -input -> gx_multi_line_text_view_text_scroll_shift / line_height;
101 last_visible_line = first_visible_line + (INT)input -> gx_multi_line_text_view_text_visible_rows;
102 if (last_visible_line > (INT)(input -> gx_multi_line_text_view_text_total_rows - 1))
103 {
104 last_visible_line = (INT)input -> gx_multi_line_text_view_text_total_rows - 1;
105 }
106
107 line_cache_start = (INT)input -> gx_multi_line_text_view_first_cache_line;
108
109 if (input -> gx_multi_line_text_input_start_mark <= line_index[first_visible_line - line_cache_start])
110 {
111 start_pos.gx_point_x = input -> gx_widget_size.gx_rectangle_left;
112 start_pos.gx_point_y = input -> gx_widget_size.gx_rectangle_top;
113 }
114 else if (input -> gx_multi_line_text_input_start_mark >= line_index[last_visible_line - line_cache_start])
115 {
116 start_pos.gx_point_x = input -> gx_widget_size.gx_rectangle_left;
117 start_pos.gx_point_y = input -> gx_widget_size.gx_rectangle_bottom;
118 }
119 else
120 {
121 end_pos = cursor_ptr -> gx_text_input_cursor_pos;
122 input -> gx_multi_line_text_input_text_insert_position = input -> gx_multi_line_text_input_start_mark;
123 cursor_line = input -> gx_multi_line_text_input_text_cursor_line;
124
125 _gx_multi_line_text_input_cursor_pos_update(input, GX_FALSE);
126 start_pos = cursor_ptr -> gx_text_input_cursor_pos;
127
128 input -> gx_multi_line_text_input_text_insert_position = input -> gx_multi_line_text_input_end_mark;
129 input -> gx_multi_line_text_input_text_cursor_line = cursor_line;
130 cursor_ptr -> gx_text_input_cursor_pos = end_pos;
131 }
132
133 _gx_multi_line_text_input_text_rectangle_get(input, start_pos, cursor_ptr -> gx_text_input_cursor_pos, rect);
134
135 return GX_SUCCESS;
136 }
137
138
