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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	gx_scrollbar_thumb_position_calculate.c	Lines:	57	57	100.0 %
Date:	2024-12-05 08:52:37	Branches:	28	28	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                                                        */
/**                                                                       */
/**   Scrollbar Management (Scrollbar)                                    */
/**                                                                       */
/**************************************************************************/

#define GX_SOURCE_CODE

/* Include necessary system files.  */

#include "gx_api.h"
#include "gx_system.h"
#include "gx_display.h"
#include "gx_context.h"
#include "gx_widget.h"
#include "gx_utility.h"
#include "gx_scrollbar.h"

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_scrollbar_thumb_position_calculate              PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Calculate and return the position of a GX_SCROLLBAR thumb button    */
/*    based scrollbar dimensions, current value, and visible range.       */
/*                                                                        */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    scroll                                Widget control block          */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _gx_context_pixelmap_get              Retrieve pixelmap image       */
/*    _gx_widget_resize                     Resize a widget               */
/*                                                                        */
/*  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    */
/*                                                                        */
/**************************************************************************/
VOID _gx_scrollbar_thumb_position_calculate(GX_SCROLLBAR *scroll)
{
INT  thumb_length = 0;
INT  travelsize;
INT  range;
INT  space;
INT  thumb_width;
INT  scroll_width;

GX_RECTANGLE thumbrect;
ULONG        style;
GX_PIXELMAP *thumb_pixelmap = NULL;

    /* pick up scrollbar style */
    style = scroll -> gx_widget_style;

    /* pick up the scroll width and thumb button width */

    thumb_width = scroll -> gx_scrollbar_appearance.gx_scroll_thumb_width;

    /* see if the thumb has a pixelmap */
    if (scroll -> gx_scrollbar_appearance.gx_scroll_thumb_pixelmap)
    {
        _gx_widget_pixelmap_get((GX_WIDGET *) scroll, scroll -> gx_scrollbar_appearance.gx_scroll_thumb_pixelmap, &thumb_pixelmap);
    }

    if (style & GX_SCROLLBAR_VERTICAL)
    {
        scroll_width = scroll -> gx_widget_size.gx_rectangle_right - scroll -> gx_widget_size.gx_rectangle_left + 1;

        travelsize = (scroll -> gx_widget_size.gx_rectangle_bottom -
                      scroll -> gx_widget_size.gx_rectangle_top) + 1;
    }
    else
    {
        scroll_width = scroll -> gx_widget_size.gx_rectangle_bottom - scroll -> gx_widget_size.gx_rectangle_top + 1;

        travelsize = (scroll -> gx_widget_size.gx_rectangle_right -
                      scroll -> gx_widget_size.gx_rectangle_left) + 1;
    }

    travelsize -= scroll -> gx_scrollbar_appearance.gx_scroll_thumb_travel_max +
                  scroll -> gx_scrollbar_appearance.gx_scroll_thumb_travel_min;

    range = scroll -> gx_scrollbar_info.gx_scroll_maximum - scroll -> gx_scrollbar_info.gx_scroll_minimum + 1;

    if (style & GX_SCROLLBAR_RELATIVE_THUMB)
    {
        if (scroll -> gx_scrollbar_info.gx_scroll_maximum !=
            scroll -> gx_scrollbar_info.gx_scroll_minimum)
        {
            thumb_length = travelsize * scroll -> gx_scrollbar_info.gx_scroll_visible;
            if (range)
            {
                thumb_length /= range;
            }
            if (thumb_length < thumb_width)
            {
                thumb_length = thumb_width;
            }
        }
    }
    else
    {
        if (thumb_pixelmap)
        {
            if (style & GX_SCROLLBAR_VERTICAL)
            {
                thumb_length = thumb_pixelmap -> gx_pixelmap_height;
                thumb_width = thumb_pixelmap -> gx_pixelmap_width;
            }
            else
            {
                thumb_length = thumb_pixelmap -> gx_pixelmap_width;
                thumb_width = thumb_pixelmap -> gx_pixelmap_height;
            }
        }
        else
        {
            /* just a square thumb button */
            thumb_length = thumb_width;
        }
    }
    space = (travelsize - thumb_length);
    space *= scroll -> gx_scrollbar_info.gx_scroll_value - scroll -> gx_scrollbar_info.gx_scroll_minimum;
    range -= scroll -> gx_scrollbar_info.gx_scroll_visible;

    if (range)
    {
        space = (space + (range >> 1)) / range;
    }


    if((scroll -> gx_scrollbar_info.gx_scroll_value > scroll -> gx_scrollbar_info.gx_scroll_minimum) &&
       (scroll -> gx_scrollbar_info.gx_scroll_value + scroll -> gx_scrollbar_info.gx_scroll_visible - 1 < scroll -> gx_scrollbar_info.gx_scroll_maximum))
    {
        if (space == 0)
        {
            space = 1;
        }
        else if (space == (travelsize - thumb_length))
        {
            space -= 1;
        }
    }

    thumbrect = scroll -> gx_widget_size;

    if (style & GX_SCROLLBAR_VERTICAL)
    {
        thumbrect.gx_rectangle_left = (GX_VALUE)(thumbrect.gx_rectangle_left + (scroll_width - thumb_width) / 2);
        thumbrect.gx_rectangle_right = (GX_VALUE) (thumbrect.gx_rectangle_left + thumb_width - 1);
        thumbrect.gx_rectangle_top = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_top +
                                                scroll -> gx_scrollbar_appearance.gx_scroll_thumb_travel_min + space);
        thumbrect.gx_rectangle_bottom = (GX_VALUE)(thumbrect.gx_rectangle_top + thumb_length - 1);
    }
    else
    {
        thumbrect.gx_rectangle_top = (GX_VALUE)(thumbrect.gx_rectangle_top + (scroll_width - thumb_width) / 2);
        thumbrect.gx_rectangle_bottom = (GX_VALUE)(thumbrect.gx_rectangle_top + thumb_width - 1);

        thumbrect.gx_rectangle_left = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_left +
                                                 scroll -> gx_scrollbar_appearance.gx_scroll_thumb_travel_min + space);
        thumbrect.gx_rectangle_right = (GX_VALUE)(thumbrect.gx_rectangle_left + thumb_length - 1);
    }

    _gx_widget_resize((GX_WIDGET *)&scroll -> gx_scrollbar_thumb, &thumbrect);
}



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			/** Scrollbar Management (Scrollbar) */
18			/** */
19			/**************************************************************************/
20
21			#define GX_SOURCE_CODE
22
23			/* Include necessary system files. */
24
25			#include "gx_api.h"
26			#include "gx_system.h"
27			#include "gx_display.h"
28			#include "gx_context.h"
29			#include "gx_widget.h"
30			#include "gx_utility.h"
31			#include "gx_scrollbar.h"
32
33			/**************************************************************************/
34			/* */
35			/* FUNCTION RELEASE */
36			/* */
37			/* _gx_scrollbar_thumb_position_calculate PORTABLE C */
38			/* 6.1 */
39			/* AUTHOR */
40			/* */
41			/* Kenneth Maxwell, Microsoft Corporation */
42			/* */
43			/* DESCRIPTION */
44			/* */
45			/* Calculate and return the position of a GX_SCROLLBAR thumb button */
46			/* based scrollbar dimensions, current value, and visible range. */
47			/* */
48			/* */
49			/* INPUT */
50			/* */
51			/* scroll Widget control block */
52			/* */
53			/* OUTPUT */
54			/* */
55			/* None */
56			/* */
57			/* CALLS */
58			/* */
59			/* _gx_context_pixelmap_get Retrieve pixelmap image */
60			/* _gx_widget_resize Resize a widget */
61			/* */
62			/* CALLED BY */
63			/* */
64			/* Application Code */
65			/* GUIX Internal Code */
66			/* */
67			/* RELEASE HISTORY */
68			/* */
69			/* DATE NAME DESCRIPTION */
70			/* */
71			/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
72			/* 09-30-2020 Kenneth Maxwell Modified comment(s), */
73			/* resulting in version 6.1 */
74			/* */
75			/**************************************************************************/
76		7701	VOID _gx_scrollbar_thumb_position_calculate(GX_SCROLLBAR *scroll)
77			{
78		7701	INT thumb_length = 0;
79			INT travelsize;
80			INT range;
81			INT space;
82			INT thumb_width;
83			INT scroll_width;
84
85			GX_RECTANGLE thumbrect;
86			ULONG style;
87		7701	GX_PIXELMAP *thumb_pixelmap = NULL;
88
89			/* pick up scrollbar style */
90		7701	style = scroll -> gx_widget_style;
91
92			/* pick up the scroll width and thumb button width */
93
94		7701	thumb_width = scroll -> gx_scrollbar_appearance.gx_scroll_thumb_width;
95
96			/* see if the thumb has a pixelmap */
97	✓✓	7701	if (scroll -> gx_scrollbar_appearance.gx_scroll_thumb_pixelmap)
98			{
99		171	_gx_widget_pixelmap_get((GX_WIDGET *) scroll, scroll -> gx_scrollbar_appearance.gx_scroll_thumb_pixelmap, &thumb_pixelmap);
100			}
101
102	✓✓	7701	if (style & GX_SCROLLBAR_VERTICAL)
103			{
104		5956	scroll_width = scroll -> gx_widget_size.gx_rectangle_right - scroll -> gx_widget_size.gx_rectangle_left + 1;
105
106		5956	travelsize = (scroll -> gx_widget_size.gx_rectangle_bottom -
107		5956	scroll -> gx_widget_size.gx_rectangle_top) + 1;
108			}
109			else
110			{
111		1745	scroll_width = scroll -> gx_widget_size.gx_rectangle_bottom - scroll -> gx_widget_size.gx_rectangle_top + 1;
112
113		1745	travelsize = (scroll -> gx_widget_size.gx_rectangle_right -
114		1745	scroll -> gx_widget_size.gx_rectangle_left) + 1;
115			}
116
117		7701	travelsize -= scroll -> gx_scrollbar_appearance.gx_scroll_thumb_travel_max +
118		7701	scroll -> gx_scrollbar_appearance.gx_scroll_thumb_travel_min;
119
120		7701	range = scroll -> gx_scrollbar_info.gx_scroll_maximum - scroll -> gx_scrollbar_info.gx_scroll_minimum + 1;
121
122	✓✓	7701	if (style & GX_SCROLLBAR_RELATIVE_THUMB)
123			{
124		7508	if (scroll -> gx_scrollbar_info.gx_scroll_maximum !=
125	✓✓	7508	scroll -> gx_scrollbar_info.gx_scroll_minimum)
126			{
127		7505	thumb_length = travelsize * scroll -> gx_scrollbar_info.gx_scroll_visible;
128	✓✓	7505	if (range)
129			{
130		7504	thumb_length /= range;
131			}
132	✓✓	7505	if (thumb_length < thumb_width)
133			{
134		640	thumb_length = thumb_width;
135			}
136			}
137			}
138			else
139			{
140	✓✓	193	if (thumb_pixelmap)
141			{
142	✓✓	170	if (style & GX_SCROLLBAR_VERTICAL)
143			{
144		58	thumb_length = thumb_pixelmap -> gx_pixelmap_height;
145		58	thumb_width = thumb_pixelmap -> gx_pixelmap_width;
146			}
147			else
148			{
149		112	thumb_length = thumb_pixelmap -> gx_pixelmap_width;
150		112	thumb_width = thumb_pixelmap -> gx_pixelmap_height;
151			}
152			}
153			else
154			{
155			/* just a square thumb button */
156		23	thumb_length = thumb_width;
157			}
158			}
159		7701	space = (travelsize - thumb_length);
160		7701	space *= scroll -> gx_scrollbar_info.gx_scroll_value - scroll -> gx_scrollbar_info.gx_scroll_minimum;
161		7701	range -= scroll -> gx_scrollbar_info.gx_scroll_visible;
162
163	✓✓	7701	if (range)
164			{
165		7191	space = (space + (range >> 1)) / range;
166			}
167
168
169	✓✓	7701	if((scroll -> gx_scrollbar_info.gx_scroll_value > scroll -> gx_scrollbar_info.gx_scroll_minimum) &&
170	✓✓	6239	(scroll -> gx_scrollbar_info.gx_scroll_value + scroll -> gx_scrollbar_info.gx_scroll_visible - 1 < scroll -> gx_scrollbar_info.gx_scroll_maximum))
171			{
172	✓✓	4633	if (space == 0)
173			{
174		395	space = 1;
175			}
176	✓✓	4238	else if (space == (travelsize - thumb_length))
177			{
178		5	space -= 1;
179			}
180			}
181
182		7701	thumbrect = scroll -> gx_widget_size;
183
184	✓✓	7701	if (style & GX_SCROLLBAR_VERTICAL)
185			{
186		5956	thumbrect.gx_rectangle_left = (GX_VALUE)(thumbrect.gx_rectangle_left + (scroll_width - thumb_width) / 2);
187		5956	thumbrect.gx_rectangle_right = (GX_VALUE) (thumbrect.gx_rectangle_left + thumb_width - 1);
188		5956	thumbrect.gx_rectangle_top = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_top +
189		5956	scroll -> gx_scrollbar_appearance.gx_scroll_thumb_travel_min + space);
190		5956	thumbrect.gx_rectangle_bottom = (GX_VALUE)(thumbrect.gx_rectangle_top + thumb_length - 1);
191			}
192			else
193			{
194		1745	thumbrect.gx_rectangle_top = (GX_VALUE)(thumbrect.gx_rectangle_top + (scroll_width - thumb_width) / 2);
195		1745	thumbrect.gx_rectangle_bottom = (GX_VALUE)(thumbrect.gx_rectangle_top + thumb_width - 1);
196
197		1745	thumbrect.gx_rectangle_left = (GX_VALUE)(scroll -> gx_widget_size.gx_rectangle_left +
198		1745	scroll -> gx_scrollbar_appearance.gx_scroll_thumb_travel_min + space);
199		1745	thumbrect.gx_rectangle_right = (GX_VALUE)(thumbrect.gx_rectangle_left + thumb_length - 1);
200			}
201
202		7701	_gx_widget_resize((GX_WIDGET *)&scroll -> gx_scrollbar_thumb, &thumbrect);
203		7701	}
204