/*************************************************************************** * Copyright (c) 2024 Microsoft Corporation * * This program and the accompanying materials are made available under the * terms of the MIT License which is available at * https://opensource.org/licenses/MIT. * * SPDX-License-Identifier: MIT **************************************************************************/ /**************************************************************************/ /**************************************************************************/ /** */ /** GUIX Component */ /** */ /** Text Input Management (Single Line Text Input) */ /** */ /**************************************************************************/ #define GX_SOURCE_CODE /* Include necessary system files. */ #include "gx_api.h" #include "gx_context.h" #include "gx_system.h" #include "gx_widget.h" #include "gx_single_line_text_input.h" #include "gx_text_input_cursor.h" #include "gx_utility.h" /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _gx_single_line_text_input_left_arrow PORTABLE C */ /* 6.1 */ /* AUTHOR */ /* */ /* Kenneth Maxwell, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This service moves the text input cursor one character position to */ /* the left. */ /* */ /* INPUT */ /* */ /* text_input Single-line text input widget */ /* control block */ /* */ /* OUTPUT */ /* */ /* None */ /* */ /* CALLS */ /* */ /* _gx_utility_utf8_string_character_get Parse utf8 string to */ /* multi-byte glyph */ /* _gx_widget_border_width_get Get the widget border width */ /* _gx_widget_client_get Get widget client rectangle */ /* _gx_widget_font_get Get font by specified ID */ /* _gx_system_string_width_get Get the width of a string */ /* _gx_system_dirty_mark Mark the area of the widget */ /* as dirty */ /* _gx_system_dirty_partial_add Mark the partial area of a */ /* widget as dirty */ /* _gx_text_input_cursor_dirty_rectangle_get */ /* Get cursor rectangle */ /* */ /* CALLED BY */ /* */ /* Application Code */ /* GUIX Internal Code */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ /* 09-30-2020 Kenneth Maxwell Modified comment(s), */ /* resulting in version 6.1 */ /* */ /**************************************************************************/ UINT _gx_single_line_text_input_left_arrow(GX_SINGLE_LINE_TEXT_INPUT *text_input) { GX_TEXT_INPUT_CURSOR *cursor_ptr = &text_input -> gx_single_line_text_input_cursor_instance; UINT insert_pos; GX_RECTANGLE client; GX_RECTANGLE cursor_rect; GX_VALUE old_cursor_pos; GX_VALUE cursor_pos; GX_VALUE width; GX_FONT *gx_font; UINT glyph_len = 1; UINT start_mark = text_input -> gx_single_line_text_input_start_mark; UINT end_mark = text_input -> gx_single_line_text_input_end_mark; GX_BOOL mark_all = GX_FALSE; GX_STRING string; string.gx_string_ptr = text_input -> gx_single_line_text_input_buffer; string.gx_string_length = text_input -> gx_single_line_text_input_string_size; /* Move the cursor to the left by a character width. */ /* Pick up widget border width. */ _gx_widget_border_width_get((GX_WIDGET *)text_input, &width); /* Get widget client rectangle. */ _gx_widget_client_get((GX_WIDGET *)text_input, width, &client); cursor_pos = cursor_ptr -> gx_text_input_cursor_pos.gx_point_x; old_cursor_pos = cursor_pos; if (start_mark != end_mark) { text_input -> gx_single_line_text_input_start_mark = 0; text_input -> gx_single_line_text_input_end_mark = 0; if (end_mark < start_mark) { if (((cursor_pos > client.gx_rectangle_left) && (cursor_pos < client.gx_rectangle_right)) || ((text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK) == GX_STYLE_TEXT_CENTER)) { /* No need to update cursor position, just need mark cursor and highlight area as dirty. */ _gx_text_input_cursor_dirty_rectangle_get(cursor_ptr, &cursor_rect); _gx_single_line_text_input_text_rectangle_get(text_input, (INT)(start_mark - end_mark), &client); /* Combine cursor rect and highlight area. */ _gx_utility_rectangle_combine(&client, &cursor_rect); return _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client); } } } insert_pos = text_input -> gx_single_line_text_input_insert_pos; if ((insert_pos > 0) || (start_mark > end_mark)) { if (end_mark >= start_mark) { /* Calculate new cursor position. */ if (end_mark != start_mark) { glyph_len = end_mark - start_mark; } #ifdef GX_UTF8_SUPPORT else { /* Get the glyph length of the cursor left character. */ _gx_utility_utf8_string_backward_character_length_get(&string, (INT)(insert_pos - 1), &glyph_len); } #endif /* Reset the value of cursor positin. */ text_input -> gx_single_line_text_input_insert_pos -= glyph_len; /* Pick up text font. */ _gx_widget_font_get((GX_WIDGET *)text_input, text_input -> gx_prompt_font_id, &gx_font); /* Get text length before current cursor position to new cursor position. */ string.gx_string_ptr += (insert_pos - glyph_len); string.gx_string_length = glyph_len; _gx_system_string_width_get_ext(gx_font, &string, &width); cursor_pos = (GX_VALUE)(cursor_ptr -> gx_text_input_cursor_pos.gx_point_x - width); } switch (text_input -> gx_widget_style & GX_STYLE_TEXT_ALIGNMENT_MASK) { case GX_STYLE_TEXT_CENTER: if (start_mark == end_mark) { /* Mark old cursor area dirty. */ _gx_text_input_cursor_dirty_rectangle_get(cursor_ptr, &client); _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client); } cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = cursor_pos; /* Mark new cursor area dirty. */ _gx_text_input_cursor_dirty_rectangle_get(cursor_ptr, &client); _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client); break; case GX_STYLE_TEXT_RIGHT: case GX_STYLE_TEXT_LEFT: default: if (cursor_pos < client.gx_rectangle_left + 1) { /* Update text input x offset. */ text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset - client.gx_rectangle_left - 1 + cursor_pos); cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_left + 1); mark_all = GX_TRUE; } else if (cursor_pos > client.gx_rectangle_right - 1) { /* Cursor position is out of client rectangle, update x offset. */ text_input -> gx_single_line_text_input_xoffset = (GX_VALUE)(text_input -> gx_single_line_text_input_xoffset + cursor_pos - client.gx_rectangle_right + 1); cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = (GX_VALUE)(client.gx_rectangle_right - 1); /* Should mark all widget as dirty. */ mark_all = GX_TRUE; } else { if (start_mark == end_mark) { /* Mark old cursor area dirty. */ _gx_text_input_cursor_dirty_rectangle_get(cursor_ptr, &client); _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client); } cursor_ptr -> gx_text_input_cursor_pos.gx_point_x = cursor_pos; /* Mark new cursor area dirty. */ _gx_text_input_cursor_dirty_rectangle_get(cursor_ptr, &client); _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client); } break; } if ((!mark_all) && (start_mark != end_mark)) { /* Mark highlight area as dirty. */ client.gx_rectangle_left = cursor_pos; client.gx_rectangle_right = (GX_VALUE)(old_cursor_pos - 1); } _gx_system_dirty_partial_add((GX_WIDGET *)text_input, &client); } return GX_SUCCESS; }