GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: gx_widget_nav_order_initialize.c Lines: 44 44 100.0 %
Date: 2024-12-05 08:52:37 Branches: 38 38 100.0 %

Line Branch Exec Source
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/***************************************************************************
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 * Copyright (c) 2024 Microsoft Corporation
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 *
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 * This program and the accompanying materials are made available under the
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 * terms of the MIT License which is available at
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 * https://opensource.org/licenses/MIT.
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 *
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 * SPDX-License-Identifier: MIT
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 **************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/**                                                                       */
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/** GUIX Component                                                        */
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/**                                                                       */
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/**   Widget Management (Widget)                                          */
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/**                                                                       */
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/**************************************************************************/
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#define GX_SOURCE_CODE
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/* Include necessary system files.  */
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#include "gx_api.h"
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#include "gx_system.h"
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#include "gx_widget.h"
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/**************************************************************************/
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/*                                                                        */
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/*  FUNCTION                                               RELEASE        */
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/*                                                                        */
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/*    _gx_widget_nav_order_initialize                     PORTABLE C      */
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/*                                                           6.1          */
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/*  AUTHOR                                                                */
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/*                                                                        */
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/*    Kenneth Maxwell, Microsoft Corporation                              */
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/*                                                                        */
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/*  DESCRIPTION                                                           */
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/*                                                                        */
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/*    This function configures next/previous navigation order.            */
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/*                                                                        */
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/*  INPUT                                                                 */
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/*                                                                        */
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/*    widget                                Widget control block          */
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/*                                                                        */
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/*  OUTPUT                                                                */
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/*                                                                        */
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/*    status                                Completion status             */
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/*                                                                        */
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/*  CALLS                                                                 */
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/*                                                                        */
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/*                                                                        */
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/*  CALLED BY                                                             */
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/*                                                                        */
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/*    GUIX Internal Code                                                  */
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/*                                                                        */
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/*  RELEASE HISTORY                                                       */
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/*                                                                        */
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/*    DATE              NAME                      DESCRIPTION             */
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/*                                                                        */
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/*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
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/*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
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/*                                            resulting in version 6.1    */
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/*                                                                        */
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/**************************************************************************/
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VOID _gx_widget_nav_order_initialize(GX_WIDGET *widget)
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{
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GX_WIDGET *winner;
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GX_WIDGET *child;
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GX_WIDGET *first_stop = NULL;
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GX_WIDGET *last_stop = NULL;
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GX_BOOL    assign_default_focus = GX_TRUE;
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    child = widget -> gx_widget_first_child;
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    /* test to see if any child already has default focus status flag */
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    while (child)
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    {
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        if (assign_default_focus)
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        {
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            if (child -> gx_widget_status & GX_STATUS_DEFAULT_FOCUS)
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            {
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                assign_default_focus = GX_FALSE;
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            }
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        }
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        else
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        {
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            /* make sure only one child has default focus flag */
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            child -> gx_widget_status &= ~GX_STATUS_DEFAULT_FOCUS;
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        }
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        child -> gx_widget_nav_next = GX_NULL;
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        child -> gx_widget_nav_previous = GX_NULL;
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        child = child -> gx_widget_next;
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    }
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    /* loop through child widgets looking for
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       the top-left child and assigning the navigation order
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       in left-to-right top-to-bottom order.
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     */
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    do
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    {
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        child = widget -> gx_widget_first_child;
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        winner = GX_NULL;
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        while (child)
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        {
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            if (child == last_stop || (child -> gx_widget_status & GX_STATUS_VISIBLE) == 0)
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            {
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                child = child -> gx_widget_next;
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                continue;
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            }
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            if (!child -> gx_widget_nav_next)
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            {
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                if ((child -> gx_widget_status & GX_STATUS_ACCEPTS_FOCUS) &&
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                    !(child -> gx_widget_status & GX_STATUS_NONCLIENT))
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                {
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                    if (winner)
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                    {
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                        if (child -> gx_widget_size.gx_rectangle_top < winner -> gx_widget_size.gx_rectangle_top)
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                        {
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                            winner = child;
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                        }
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                        else
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                        {
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                            if (child -> gx_widget_size.gx_rectangle_top == winner -> gx_widget_size.gx_rectangle_top &&
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                                child -> gx_widget_size.gx_rectangle_left < winner -> gx_widget_size.gx_rectangle_left)
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                            {
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                                winner = child;
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                            }
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                        }
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                    }
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                    else
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                    {
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                        winner = child;
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                    }
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                }
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            }
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            child = child -> gx_widget_next;
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        }
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        if (winner)
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        {
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            if (!first_stop)
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            {
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                first_stop = winner;
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                if (assign_default_focus)
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                {
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                    first_stop -> gx_widget_status |= GX_STATUS_DEFAULT_FOCUS;
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                }
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            }
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            if (last_stop)
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            {
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                winner -> gx_widget_nav_previous = last_stop;
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                last_stop -> gx_widget_nav_next = winner;
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            }
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            last_stop = winner;
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        }
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    } while (winner);
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    /* loop the last in the order back to the first */
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    if (last_stop)
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    {
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        last_stop -> gx_widget_nav_next = first_stop;
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        first_stop -> gx_widget_nav_previous = last_stop;
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    }
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}
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