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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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/** 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_system.h" |
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#include "gx_context.h" |
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#include "gx_widget.h" |
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#include "gx_single_line_text_input.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_character_insert 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 services inserts a character into the text input string at the */ |
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/* current cursor 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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/* insert_str Byte string of insert */ |
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/* character */ |
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/* insert_size String size of insert */ |
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/* character */ |
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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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/* memmove Move a block of memory */ |
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/* _gx_widget_font_get Get font by specified ID */ |
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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_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_single_line_text_input_backspace Remove text before the cursor */ |
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/* _gx_single_line_text_input_character_delete */ |
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/* Remove text after the cursor */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application Code */ |
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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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UINT _gx_single_line_text_input_character_insert(GX_SINGLE_LINE_TEXT_INPUT *text_input, GX_UBYTE *insert_str, UINT insert_size) |
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{ |
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GX_TEXT_INPUT_CURSOR *cursor_ptr; |
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UINT buffer_size; |
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GX_CHAR *string_buffer; |
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UINT string_size; |
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GX_VALUE new_cursor_pos; |
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UINT insert_pos; |
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GX_VALUE border_width; |
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GX_VALUE client_right; |
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GX_VALUE client_width; |
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GX_VALUE insert_width; |
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GX_VALUE text_width; |
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GX_FONT *gx_font; |
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GX_RECTANGLE dirty_area; |
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GX_STRING string; |
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/* Delete hightlight text. */ |
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✓✓ |
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if (text_input -> gx_single_line_text_input_start_mark != text_input -> gx_single_line_text_input_end_mark) |
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{ |
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✓✓ |
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if (text_input -> gx_single_line_text_input_end_mark > text_input -> gx_single_line_text_input_start_mark) |
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{ |
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_gx_single_line_text_input_backspace(text_input); |
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} |
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else |
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{ |
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_gx_single_line_text_input_character_delete(text_input); |
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} |
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} |
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cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance; |
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buffer_size = text_input -> gx_single_line_text_input_buffer_size; |
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string_size = text_input -> gx_single_line_text_input_string_size; |
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/* Judge whether there have remaining buffer size. */ |
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✓✓ |
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if (buffer_size < string_size + insert_size + 1) |
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{ |
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return GX_FAILURE; |
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} |
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string_buffer = text_input -> gx_single_line_text_input_buffer; |
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_gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_prompt_font_id, &gx_font); |
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/* Pick up text witth. */ |
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string.gx_string_ptr = string_buffer; |
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string.gx_string_length = text_input -> gx_single_line_text_input_string_size; |
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_gx_system_string_width_get_ext(gx_font, &string, &text_width); |
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/* Insert a char to the string buffer. */ |
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insert_pos = text_input -> gx_single_line_text_input_insert_pos; |
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memmove(string_buffer + insert_pos + insert_size, string_buffer + insert_pos, string_size - insert_pos); |
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memmove(string_buffer + insert_pos, insert_str, insert_size); |
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string_buffer[string_size + insert_size] = '\0'; |
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/* Update the input string size and cursor position. */ |
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text_input -> gx_single_line_text_input_string_size += insert_size; |
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text_input -> gx_single_line_text_input_insert_pos += insert_size; |
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/* Calculate inside widget right. */ |
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_gx_widget_border_width_get((GX_WIDGET *)text_input, &border_width); |
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_gx_widget_client_get((GX_WIDGET *)text_input, border_width, &dirty_area); |
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client_right = dirty_area.gx_rectangle_right; |
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/* Get inset character width. */ |
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string.gx_string_ptr = (GX_CONST GX_CHAR *)insert_str; |
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string.gx_string_length = insert_size; |
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_gx_system_string_width_get_ext(gx_font, &string, &insert_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_RIGHT: |
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text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset + insert_width); |
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dirty_area.gx_rectangle_right = cursor_ptr -> gx_text_input_cursor_pos.gx_point_x; |
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break; |
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case GX_STYLE_TEXT_CENTER: |
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/* Calculate the cursor position. */ |
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client_width = (GX_VALUE)(dirty_area.gx_rectangle_right - dirty_area.gx_rectangle_left + 1); |
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text_width = (GX_VALUE)(text_width + insert_width); |
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new_cursor_pos = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - |
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(((text_width + 1) >> 1) - text_input -> gx_single_line_text_input_xoffset) + |
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insert_width); |
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/* Update offset in x axis. */ |
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text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)((text_width + 1) >> 1); |
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/* Update offset in x axis. */ |
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✓✓ |
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if (new_cursor_pos < client_right - 1) |
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{ |
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dirty_area.gx_rectangle_left = (GX_VALUE)(dirty_area.gx_rectangle_left + 1 + (client_width >> 1) - text_input -> gx_single_line_text_input_xoffset); |
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dirty_area.gx_rectangle_right = (GX_VALUE)(dirty_area.gx_rectangle_left + text_width); |
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dirty_area.gx_rectangle_left = (GX_VALUE)(dirty_area.gx_rectangle_left - (cursor_ptr -> gx_text_input_cursor_width >> 1)); |
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dirty_area.gx_rectangle_right = (GX_VALUE)(dirty_area.gx_rectangle_right + ((cursor_ptr -> gx_text_input_cursor_width + 1) >> 1) - 1); |
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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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break; |
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case GX_STYLE_TEXT_LEFT: |
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default: |
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/* Calculate cursor position. */ |
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new_cursor_pos = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x + insert_width); |
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/* Update offset in x axis. */ |
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✓✓ |
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if (new_cursor_pos > client_right - 1) |
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{ |
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text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset + new_cursor_pos - client_right + 1); |
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new_cursor_pos = (GX_VALUE)(client_right - 1); |
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} |
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else |
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{ |
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dirty_area.gx_rectangle_left = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - (cursor_ptr -> gx_text_input_cursor_width >> 1)); |
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dirty_area.gx_rectangle_right = (GX_VALUE)(new_cursor_pos + text_width + cursor_ptr -> gx_text_input_cursor_width - 1); |
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} |
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/* Update x coordinate of cursor position. */ |
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cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = new_cursor_pos; |
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break; |
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} |
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/* Mark the text input widget be changed. */ |
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text_input -> gx_single_line_text_input_was_modified = GX_TRUE; |
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_gx_system_dirty_partial_add((GX_WIDGET *)text_input, &dirty_area); |
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return GX_SUCCESS; |
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} |
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