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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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/** System Management (System) */ |
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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_system_input_release PORTABLE C */ |
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/* 6.2.1 */ |
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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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/* Release previously captured input events */ |
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/* */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* owner Widget that releases input */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* status Return status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _GX_ENTER_CRITICAL Enter critical section */ |
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/* _gx_widget_status_remove Remove a flag from the widget */ |
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/* _GX_EXIT_CRITICAL Exit critical section */ |
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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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/* 07-29-2022 Kenneth Maxwell Modified comment(s), */ |
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/* optimized logic and ensured */ |
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/* released stack entries are */ |
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/* reset to NULL, */ |
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/* resulting in version 6.1.12 */ |
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/* 03-08-2023 Ting Zhu Modified comment(s), */ |
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/* improved logic, */ |
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/* resulting in version 6.2.1 */ |
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/* */ |
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/**************************************************************************/ |
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UINT _gx_system_input_release(GX_WIDGET *owner) |
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{ |
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UINT status = GX_PTR_ERROR; |
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GX_WIDGET **stack; |
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INT current; |
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INT top; |
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GX_ENTER_CRITICAL |
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✓✓ |
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if (_gx_system_capture_count > 0) |
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{ |
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✓✓ |
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if (owner -> gx_widget_status & GX_STATUS_OWNS_INPUT) |
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{ |
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stack = _gx_system_input_capture_stack; |
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top = _gx_system_capture_count - 1; |
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current = 0; |
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✓✓ |
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while (current <= top) |
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{ |
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✓✓ |
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if (stack[current] == owner) |
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{ |
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_gx_widget_status_remove(owner, GX_STATUS_OWNS_INPUT); |
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_gx_system_capture_count--; |
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status = GX_SUCCESS; |
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break; |
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} |
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current++; |
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} |
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✓✓ |
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if (status == GX_SUCCESS) |
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{ |
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/* collapse the stack if this entry was in the middle */ |
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✓✓ |
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while (current < top) |
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{ |
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stack[current] = stack[current + 1]; |
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current++; |
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} |
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stack[current] = GX_NULL; |
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✓✓ |
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if (top > 0) |
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{ |
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_gx_system_input_owner = stack[top - 1]; |
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} |
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else |
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{ |
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_gx_system_input_owner = GX_NULL; |
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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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status = GX_NO_CHANGE; |
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} |
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} |
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else |
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{ |
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status = GX_NO_CHANGE; |
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} |
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GX_EXIT_CRITICAL |
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return status; |
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} |
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