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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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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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/** Text Input Management (Single 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_context.h" |
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#include "gx_system.h" |
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#include "gx_widget.h" |
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#include "gx_single_line_text_input.h" |
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#include "gx_text_input_cursor.h" |
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#include "gx_utility.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_single_line_text_input_mark_previous 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 highlights the character before the end mark position.*/ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* text_input Single-line text input widget */ |
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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_utility_utf8_string_character_get Parse utf8 string to */ |
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/* multi-byte glyph */ |
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/* _gx_widget_border_width_get Get the widget border width */ |
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/* _gx_widget_client_get Get widget client rectangle */ |
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/* _gx_widget_font_get Get font by specified ID */ |
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/* _gx_system_string_width_get Get the width of a string */ |
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/* _gx_system_dirty_partial_add Mark the partial area of a */ |
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/* widget as dirty */ |
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/* _gx_text_input_cursor_dirty_rectangle_get */ |
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/* Get cursor rectangle */ |
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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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/**************************************************************************/ |
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UINT _gx_single_line_text_input_mark_previous(GX_SINGLE_LINE_TEXT_INPUT *text_input) |
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{ |
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GX_TEXT_INPUT_CURSOR *cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance; |
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GX_RECTANGLE client; |
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GX_RECTANGLE cursor_rect; |
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GX_VALUE new_cursor_pos; |
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GX_VALUE width; |
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GX_FONT *gx_font; |
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UINT glyph_len = 1; |
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GX_BOOL mark_all = GX_FALSE; |
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UINT start_mark = text_input -> gx_single_line_text_input_start_mark; |
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UINT end_mark = text_input -> gx_single_line_text_input_end_mark; |
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GX_STRING string; |
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✓✓ |
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if (start_mark == end_mark) |
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{ |
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start_mark = text_input -> gx_single_line_text_input_insert_pos; |
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end_mark = text_input -> gx_single_line_text_input_insert_pos; |
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text_input -> gx_single_line_text_input_start_mark = start_mark; |
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text_input -> gx_single_line_text_input_end_mark = end_mark; |
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} |
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string.gx_string_ptr = (GX_CONST GX_CHAR *)text_input -> gx_single_line_text_input_buffer; |
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string.gx_string_length = text_input -> gx_single_line_text_input_string_size; |
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✓✓ |
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if (end_mark > 0) |
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{ |
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#ifdef GX_UTF8_SUPPORT |
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/* Get the glyph length of the character before end mark */ |
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_gx_utility_utf8_string_backward_character_length_get(&string, (INT)(end_mark - 1), &glyph_len); |
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#endif |
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text_input -> gx_single_line_text_input_end_mark -= glyph_len; |
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text_input -> gx_single_line_text_input_insert_pos -= glyph_len; |
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/* Pick up widget border width. */ |
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_gx_widget_border_width_get((GX_WIDGET *)text_input, &width); |
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/* Get widget client rectangle. */ |
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_gx_widget_client_get((GX_WIDGET *)text_input, width, &client); |
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/* Pick up text font. */ |
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_gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_prompt_font_id, &gx_font); |
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/* Get width of the character before end mark. */ |
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string.gx_string_ptr += (end_mark - glyph_len); |
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string.gx_string_length = glyph_len; |
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_gx_system_string_width_get_ext(gx_font, &string, &width); |
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new_cursor_pos = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - width); |
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✓✓ |
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switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK) |
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{ |
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case GX_STYLE_TEXT_CENTER: |
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break; |
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case GX_STYLE_TEXT_RIGHT: |
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case GX_STYLE_TEXT_LEFT: |
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default: |
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✓✓ |
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if (new_cursor_pos < client.gx_rectangle_left + 1) |
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{ |
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/* The previous marked character is out of client area, update x offset. */ |
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text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset - |
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client.gx_rectangle_left - 1 + new_cursor_pos); |
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new_cursor_pos = (GX_VALUE)(client.gx_rectangle_left + 1); |
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/* Should mark all widget as dirty*/ |
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mark_all = GX_TRUE; |
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} |
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✓✓ |
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else if (new_cursor_pos > client.gx_rectangle_right - 1) |
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{ |
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/* Cursor position is out of client rectangle, update x offset. */ |
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text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset + |
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new_cursor_pos - client.gx_rectangle_right + 1); |
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new_cursor_pos = (GX_VALUE)(client.gx_rectangle_right - 1); |
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/* Should mark all widget as dirty. */ |
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mark_all = GX_TRUE; |
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} |
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break; |
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} |
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✓✓ |
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if (!mark_all) |
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{ |
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client.gx_rectangle_left = new_cursor_pos; |
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client.gx_rectangle_right = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - 1); |
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✓✓ |
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if (start_mark == end_mark) |
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{ |
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/* Get old cursor rectangle. */ |
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_gx_text_input_cursor_dirty_rectangle_get(cursor_ptr, &cursor_rect); |
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/* Combine with old cursor rectangle. */ |
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_gx_utility_rectangle_combine(&client, &cursor_rect); |
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} |
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} |
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cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = new_cursor_pos; |
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_gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client); |
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} |
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return GX_SUCCESS; |
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} |
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