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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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/** Multi Line Text Input Management (Multi Line Text Input) */ |
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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_window.h" |
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#include "gx_widget.h" |
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#include "gx_scrollbar.h" |
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#include "gx_multi_line_text_input.h" |
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#include "gx_multi_line_text_view.h" |
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#include "gx_text_input_cursor.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_multi_line_text_input_up_arrow 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 move the cursor up by one line. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* text_input Multi line text input */ |
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/* control block */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _gx_widget_font_get Retrieve font */ |
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/* _gx_text_input_cursor_dirty_rectangle_get */ |
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/* Get cursor rectangle */ |
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/* _gx_multi_line_text_input_cursor_pos_calculate */ |
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/* Calculate cursor position */ |
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/* according to click index */ |
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/* _gx_system_dirty_partial_add Add one dirty area to */ |
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/* dirty list */ |
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/* _gx_system_dirty_mark Mark widget area dirty */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* _gx_multi_line_text_input_keydown_process */ |
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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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UINT _gx_multi_line_text_input_up_arrow(GX_MULTI_LINE_TEXT_INPUT *text_input) |
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{ |
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GX_TEXT_INPUT_CURSOR *cursor_ptr = &text_input -> gx_multi_line_text_input_cursor_instance; |
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GX_VALUE line_height; |
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GX_POINT cursor_pos; |
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INT shift; |
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GX_RECTANGLE cursor_rect; |
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GX_FONT *font; |
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_gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_multi_line_text_view_font_id, &font); |
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✓✓ |
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if (!font) |
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{ |
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return GX_FAILURE; |
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} |
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✓✓ |
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if (text_input -> gx_multi_line_text_input_start_mark != text_input -> gx_multi_line_text_input_end_mark) |
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{ |
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_gx_multi_line_text_input_left_arrow(text_input); |
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} |
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/* Record cursor rectangle and scroll shift value before recalculate cursor position. */ |
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_gx_text_input_cursor_dirty_rectangle_get(&text_input -> gx_multi_line_text_input_cursor_instance, &cursor_rect); |
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shift = text_input -> gx_multi_line_text_view_text_scroll_shift; |
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line_height = (GX_VALUE)(font -> gx_font_line_height + |
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text_input -> gx_multi_line_text_view_line_space); |
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✓✓ |
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if (!line_height) |
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{ |
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return GX_FAILURE; |
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} |
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cursor_pos = cursor_ptr -> gx_text_input_cursor_pos; |
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cursor_pos.gx_point_y = (GX_VALUE)(cursor_pos.gx_point_y - line_height); |
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_gx_multi_line_text_input_cursor_pos_calculate(text_input, cursor_pos); |
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✓✓ |
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if (shift == text_input -> gx_multi_line_text_view_text_scroll_shift) |
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{ |
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/* Mark old cursor area dirty. */ |
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_gx_system_dirty_partial_add((GX_WIDGET *)text_input, &cursor_rect); |
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_gx_text_input_cursor_dirty_rectangle_get(&text_input -> gx_multi_line_text_input_cursor_instance, &cursor_rect); |
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/* Mark new cursor area dirty. */ |
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_gx_system_dirty_partial_add((GX_WIDGET *)text_input, &cursor_rect); |
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} |
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else |
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{ |
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/* Mark widget area dirty. */ |
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_gx_system_dirty_mark((GX_WIDGET *)text_input); |
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} |
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return GX_SUCCESS; |
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} |
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