Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_single_line_text_input_position_get.c	Lines:	61	61	100.0 %
Date:	2024-12-05 08:52:37	Branches:	19	19	100.0 %


/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** GUIX Component                                                        */
/**                                                                       */
/**   Text Input Management (Single Line Text Input)                      */
/**                                                                       */
/**************************************************************************/

#define GX_SOURCE_CODE


/* Include necessary system files.  */

#include "gx_api.h"
#include "gx_context.h"
#include "gx_system.h"
#include "gx_widget.h"
#include "gx_single_line_text_input.h"
#include "gx_utility.h"

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_single_line_text_input_position_get             PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This service positions the text input cursor based on the requested */
/*    cursor position. The text input cursor index will be calculated     */
/*    based on the x value of the pixel pisition.                         */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    text_input                                Single-line text input    */
/*                                                widget control block    */
/*    pixel_position                            X value of pixel position */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Status                                    Completion status         */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _gx_widget_font_get                   Get widget font               */
/*    _gx_widget_border_width_get           Get the widget border width   */
/*    _gx_widget_client_get                 Get client rectangle          */
/*    _gx_utility_utf8_string_character_get Parse utf8 string to          */
/*                                            multi-byte glyph            */
/*    _gx_system_string_width_get           Get the width of a string     */
/*    _gx_system_dirty_mark                 Mark a widget area dirty      */
/*    _gx_system_dirty_partial_add          Mark the partial area of a    */
/*                                            widget as dirty             */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*    GUIX Internal Code                                                  */
/*                                                                        */
/*  RELEASE HISTORY                                                       */
/*                                                                        */
/*    DATE              NAME                      DESCRIPTION             */
/*                                                                        */
/*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
/*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
/*                                            resulting in version 6.1    */
/*                                                                        */
/**************************************************************************/
UINT _gx_single_line_text_input_position_get(GX_SINGLE_LINE_TEXT_INPUT *text_input, INT pixel_position)
{
GX_TEXT_INPUT_CURSOR *cursor_ptr;
GX_CHAR              *string_buffer;
GX_FONT              *gx_font;
GX_RECTANGLE          client;
GX_VALUE              width;
GX_VALUE              cursor_pos;
GX_VALUE              x_pos;
GX_VALUE              distance;
UINT                  new_insert_pos;
UINT                  index;
UINT                  glyph_len = 1;
GX_STRING             utf8_string;
GX_STRING             string;

    string.gx_string_ptr = text_input -> gx_single_line_text_input_buffer;
    string.gx_string_length = text_input -> gx_single_line_text_input_string_size;

    cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance;

    string_buffer = text_input -> gx_single_line_text_input_buffer;

    _gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_prompt_font_id, &gx_font);

    _gx_widget_border_width_get((GX_WIDGET *)text_input, &width);
    _gx_widget_client_get((GX_WIDGET *)text_input, width, &client);

    switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK)
    {
    case GX_STYLE_TEXT_RIGHT:
        x_pos = (GX_VALUE)(client.gx_rectangle_right - 1);
        break;

    case GX_STYLE_TEXT_CENTER:
        x_pos = (GX_VALUE)(client.gx_rectangle_left + 1 + ((client.gx_rectangle_right - client.gx_rectangle_left + 1) >> 1));
        break;

    case GX_STYLE_TEXT_LEFT:
    default:
        x_pos = (GX_VALUE)(client.gx_rectangle_left + 1);
        break;
    }

    x_pos = (GX_VALUE)(x_pos - text_input -> gx_single_line_text_input_xoffset);

    /* Reset mouse down position when it was out of the text show area. */
    if (pixel_position < client.gx_rectangle_left + 1)
    {
        pixel_position = client.gx_rectangle_left + 1;
    }
    else if (pixel_position > client.gx_rectangle_right + 1)
    {
        pixel_position = client.gx_rectangle_right - 1;
    }

    /*Compute the distance from the first character position to the mouse down position. */
    if (pixel_position > x_pos)
    {
        distance = (GX_VALUE)(pixel_position - x_pos);
    }
    else
    {
        distance = 0;
    }

    new_insert_pos = string.gx_string_length;
    index = 0;
    cursor_pos = 0;

    while (string.gx_string_length > 0)
    {
#ifdef GX_UTF8_SUPPORT
        _gx_utility_utf8_string_character_get(&string, GX_NULL, &glyph_len);
#else
        string.gx_string_ptr++;
        string.gx_string_length--;
#endif
        utf8_string.gx_string_ptr = string_buffer + index;
        utf8_string.gx_string_length = glyph_len;

        _gx_system_string_width_get_ext(gx_font, &utf8_string, &width);
        if ((cursor_pos + width / 2) > distance)
        {
            new_insert_pos = index;
            break;
        }
        cursor_pos = (GX_VALUE)(cursor_pos + width);
        index += glyph_len;
    }

    /* Update insert position. */
    text_input -> gx_single_line_text_input_insert_pos = new_insert_pos;

    cursor_pos = (GX_VALUE)(x_pos + cursor_pos);

    if (cursor_pos < client.gx_rectangle_left + 1)
    {
        /* Cursor is beyond widget left, adjust text offset to show cursor.  */
        cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_left + 1);

        distance = (GX_VALUE)(client.gx_rectangle_left + 1 - cursor_pos);
        text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset - distance);

        /* Text offset is modified, mark whole text input area dirty. */
        _gx_system_dirty_mark((GX_WIDGET *)text_input);
    }
    else if (cursor_pos > client.gx_rectangle_right - 1)
    {
        /* Cursor is beyond widget right, adjust text offset to show cursor.  */
        cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_right - 1);

        distance = (GX_VALUE)(cursor_pos - (client.gx_rectangle_right - 1));
        text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset + distance);

        /* Text offset is modified, mark whole text input area dirty. */
        _gx_system_dirty_mark((GX_WIDGET *)text_input);
    }
    else if (cursor_ptr -> gx_text_input_cursor_pos.gx_point_x != cursor_pos)
    {
        /* For this situation, we only need to mark old and new cursor position dirty.  */
        client.gx_rectangle_left = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - (cursor_ptr -> gx_text_input_cursor_width >> 1));
        client.gx_rectangle_right = (GX_VALUE)(client.gx_rectangle_left + cursor_ptr -> gx_text_input_cursor_width);
        _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client);

        cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = cursor_pos;

        client.gx_rectangle_left = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - (cursor_ptr -> gx_text_input_cursor_width >> 1));
        client.gx_rectangle_right = (GX_VALUE)(client.gx_rectangle_left + cursor_ptr -> gx_text_input_cursor_width);
        _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client);
    }

    return GX_SUCCESS;
}



Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
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			#include "gx_utility.h"
32
33			/**************************************************************************/
34			/* */
35			/* FUNCTION RELEASE */
36			/* */
37			/* _gx_single_line_text_input_position_get PORTABLE C */
38			/* 6.1 */
39			/* AUTHOR */
40			/* */
41			/* Kenneth Maxwell, Microsoft Corporation */
42			/* */
43			/* DESCRIPTION */
44			/* */
45			/* This service positions the text input cursor based on the requested */
46			/* cursor position. The text input cursor index will be calculated */
47			/* based on the x value of the pixel pisition. */
48			/* */
49			/* INPUT */
50			/* */
51			/* text_input Single-line text input */
52			/* widget control block */
53			/* pixel_position X value of pixel position */
54			/* */
55			/* OUTPUT */
56			/* */
57			/* Status Completion status */
58			/* */
59			/* CALLS */
60			/* */
61			/* _gx_widget_font_get Get widget font */
62			/* _gx_widget_border_width_get Get the widget border width */
63			/* _gx_widget_client_get Get client rectangle */
64			/* _gx_utility_utf8_string_character_get Parse utf8 string to */
65			/* multi-byte glyph */
66			/* _gx_system_string_width_get Get the width of a string */
67			/* _gx_system_dirty_mark Mark a widget area dirty */
68			/* _gx_system_dirty_partial_add Mark the partial area of a */
69			/* widget as dirty */
70			/* */
71			/* CALLED BY */
72			/* */
73			/* Application Code */
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			/**************************************************************************/
85		1866	UINT _gx_single_line_text_input_position_get(GX_SINGLE_LINE_TEXT_INPUT *text_input, INT pixel_position)
86			{
87			GX_TEXT_INPUT_CURSOR *cursor_ptr;
88			GX_CHAR *string_buffer;
89			GX_FONT *gx_font;
90			GX_RECTANGLE client;
91			GX_VALUE width;
92			GX_VALUE cursor_pos;
93			GX_VALUE x_pos;
94			GX_VALUE distance;
95			UINT new_insert_pos;
96			UINT index;
97		1866	UINT glyph_len = 1;
98			GX_STRING utf8_string;
99			GX_STRING string;
100
101		1866	string.gx_string_ptr = text_input -> gx_single_line_text_input_buffer;
102		1866	string.gx_string_length = text_input -> gx_single_line_text_input_string_size;
103
104		1866	cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance;
105
106		1866	string_buffer = text_input -> gx_single_line_text_input_buffer;
107
108		1866	_gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_prompt_font_id, &gx_font);
109
110		1866	_gx_widget_border_width_get((GX_WIDGET *)text_input, &width);
111		1866	_gx_widget_client_get((GX_WIDGET *)text_input, width, &client);
112
113	✓✓✓	1866	switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK)
114			{
115		454	case GX_STYLE_TEXT_RIGHT:
116		454	x_pos = (GX_VALUE)(client.gx_rectangle_right - 1);
117		454	break;
118
119		454	case GX_STYLE_TEXT_CENTER:
120		454	x_pos = (GX_VALUE)(client.gx_rectangle_left + 1 + ((client.gx_rectangle_right - client.gx_rectangle_left + 1) >> 1));
121		454	break;
122
123		958	case GX_STYLE_TEXT_LEFT:
124			default:
125		958	x_pos = (GX_VALUE)(client.gx_rectangle_left + 1);
126		958	break;
127			}
128
129		1866	x_pos = (GX_VALUE)(x_pos - text_input -> gx_single_line_text_input_xoffset);
130
131			/* Reset mouse down position when it was out of the text show area. */
132	✓✓	1866	if (pixel_position < client.gx_rectangle_left + 1)
133			{
134		608	pixel_position = client.gx_rectangle_left + 1;
135			}
136	✓✓	1258	else if (pixel_position > client.gx_rectangle_right + 1)
137			{
138		605	pixel_position = client.gx_rectangle_right - 1;
139			}
140
141			/Compute the distance from the first character position to the mouse down position. /
142	✓✓	1866	if (pixel_position > x_pos)
143			{
144		1582	distance = (GX_VALUE)(pixel_position - x_pos);
145			}
146			else
147			{
148		284	distance = 0;
149			}
150
151		1866	new_insert_pos = string.gx_string_length;
152		1866	index = 0;
153		1866	cursor_pos = 0;
154
155	✓✓	76039	while (string.gx_string_length > 0)
156			{
157			#ifdef GX_UTF8_SUPPORT
158		75567	_gx_utility_utf8_string_character_get(&string, GX_NULL, &glyph_len);
159			#else
160			string.gx_string_ptr++;
161			string.gx_string_length--;
162			#endif
163		75567	utf8_string.gx_string_ptr = string_buffer + index;
164		75567	utf8_string.gx_string_length = glyph_len;
165
166		75567	_gx_system_string_width_get_ext(gx_font, &utf8_string, &width);
167	✓✓	75567	if ((cursor_pos + width / 2) > distance)
168			{
169		1394	new_insert_pos = index;
170		1394	break;
171			}
172		74173	cursor_pos = (GX_VALUE)(cursor_pos + width);
173		74173	index += glyph_len;
174			}
175
176			/* Update insert position. */
177		1866	text_input -> gx_single_line_text_input_insert_pos = new_insert_pos;
178
179		1866	cursor_pos = (GX_VALUE)(x_pos + cursor_pos);
180
181	✓✓	1866	if (cursor_pos < client.gx_rectangle_left + 1)
182			{
183			/* Cursor is beyond widget left, adjust text offset to show cursor. */
184		60	cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_left + 1);
185
186		60	distance = (GX_VALUE)(client.gx_rectangle_left + 1 - cursor_pos);
187		60	text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset - distance);
188
189			/* Text offset is modified, mark whole text input area dirty. */
190		60	_gx_system_dirty_mark((GX_WIDGET *)text_input);
191			}
192	✓✓	1806	else if (cursor_pos > client.gx_rectangle_right - 1)
193			{
194			/* Cursor is beyond widget right, adjust text offset to show cursor. */
195		64	cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_right - 1);
196
197		64	distance = (GX_VALUE)(cursor_pos - (client.gx_rectangle_right - 1));
198		64	text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset + distance);
199
200			/* Text offset is modified, mark whole text input area dirty. */
201		64	_gx_system_dirty_mark((GX_WIDGET *)text_input);
202			}
203	✓✓	1742	else if (cursor_ptr -> gx_text_input_cursor_pos.gx_point_x != cursor_pos)
204			{
205			/* For this situation, we only need to mark old and new cursor position dirty. */
206		750	client.gx_rectangle_left = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - (cursor_ptr -> gx_text_input_cursor_width >> 1));
207		750	client.gx_rectangle_right = (GX_VALUE)(client.gx_rectangle_left + cursor_ptr -> gx_text_input_cursor_width);
208		750	_gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client);
209
210		750	cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = cursor_pos;
211
212		750	client.gx_rectangle_left = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - (cursor_ptr -> gx_text_input_cursor_width >> 1));
213		750	client.gx_rectangle_right = (GX_VALUE)(client.gx_rectangle_left + cursor_ptr -> gx_text_input_cursor_width);
214		750	_gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client);
215			}
216
217		1866	return GX_SUCCESS;
218			}
219