2b72262b4f
I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
313 lines
11 KiB
C
313 lines
11 KiB
C
/*
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* Copyright (c) 2013, 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* display.c
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* Display handling.
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*/
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include "display.h"
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#include "editor.h"
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#include "multibyte.h"
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#include "terminal.h"
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size_t editor_display_column_of_line_offset(struct editor* editor,
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const struct line* line,
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size_t offset)
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{
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if ( line->used < offset )
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offset = line->used;
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return displayed_string_length(line->data, offset, editor->tabsize);
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}
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size_t editor_line_offset_of_display_column(struct editor* editor,
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const struct line* line,
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size_t column)
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{
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size_t current_column = 0;
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for ( size_t offset = 0; offset < line->used; offset++ )
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{
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if ( column <= current_column )
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return offset;
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wchar_t wc = line->data[offset];
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if ( wc == L'\t' )
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{
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size_t old_column = current_column;
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do current_column++;
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while ( current_column % editor->tabsize != 0 );
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if ( column <= current_column )
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{
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size_t dist_to_old = column - old_column;
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size_t dist_to_cur = current_column - column;
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if ( dist_to_old < dist_to_cur )
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return offset;
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return offset + 1;
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}
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continue;
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}
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current_column++;
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}
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return line->used;
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}
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size_t displayed_string_length(const wchar_t* str, size_t len, size_t tabsize)
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{
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size_t ret_len = 0;
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for ( size_t i = 0; i < len; i++ )
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if ( str[i] == L'\t' )
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do ret_len++;
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while ( ret_len % tabsize );
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else
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ret_len++;
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return ret_len;
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}
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struct display_char* expand_tabs(const wchar_t* str, size_t len, uint8_t* colors,
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size_t colors_len, size_t* ret_len_ptr,
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size_t tabsize)
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{
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size_t ret_len = displayed_string_length(str, len, tabsize);
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struct display_char* ret = (struct display_char*)
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malloc(sizeof(struct display_char) * (ret_len + 1));
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for ( size_t i = 0, j = 0; i < len; i++ )
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{
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uint8_t color = i < colors_len ? colors[i] : 7;
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if ( str[i] == L'\t' )
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do ret[j++] = (struct display_char) { L' ', color};
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while ( j % tabsize );
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else
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ret[j++] = (struct display_char) { str[i], color };
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}
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ret[ret_len] = (struct display_char) { L'\0', 0 };
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if ( ret_len_ptr )
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*ret_len_ptr = ret_len;
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return ret;
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}
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void render_editor(struct editor* editor, struct terminal_state* state)
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{
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if ( state->height < 1 )
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return;
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// Create the header title bar.
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for ( int x = 0; x < state->width; x++ )
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state->data[0 * state->width + x] = make_terminal_datum(L' ', 0x70);
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// Render the name of the program.
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const wchar_t* header_start = editor->dirty ? L" editor *"
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: L" editor ";
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size_t header_start_len = wcslen(header_start);
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for ( size_t i = 0; i < header_start_len; i++ )
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if ( i < (size_t) state->width)
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state->data[i].character = header_start[i];
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// Render the name of the currently open file.
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const char* file_name = editor->current_file_name;
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if ( !file_name )
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file_name = "New File";
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wchar_t* wcs_file_name = convert_mbs_to_wcs(file_name);
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size_t wcs_file_name_len = wcslen(wcs_file_name);
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for ( size_t i = 0; i < wcs_file_name_len; i++ )
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if ( header_start_len+i < (size_t) state->width)
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state->data[header_start_len+i].character = wcs_file_name[i];
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free(wcs_file_name);
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size_t line_number_width = 1;
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for ( size_t tmp = editor->lines_used; 10 <= tmp; tmp /= 10 )
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line_number_width++;
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if ( !editor->line_numbering )
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line_number_width = 0;
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// Calculate the dimensions of the viewport.
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size_t viewport_top = 1;
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size_t viewport_left = line_number_width;
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editor->viewport_width = (size_t) state->width;
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if ( editor->viewport_width < viewport_left )
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editor->viewport_width = 0;
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else
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editor->viewport_width -= viewport_left;
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editor->viewport_height = (size_t) state->height;
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if ( editor->viewport_height < viewport_top )
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editor->viewport_height = 0;
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else
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editor->viewport_height -= viewport_top;
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if ( !editor->viewport_height )
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return;
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// Decide which page of the file to render and the cursor position on it.
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struct line* current_line = &editor->lines[editor->cursor_row];
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size_t cursor_x = displayed_string_length(current_line->data,
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editor->cursor_column,
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editor->tabsize);
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size_t cursor_y = editor->cursor_row;
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struct line* select_line = &editor->lines[editor->select_row];
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size_t select_x = displayed_string_length(select_line->data,
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editor->select_column,
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editor->tabsize);
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size_t select_y = editor->select_row;
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size_t page_x_offset = editor->page_x_offset;
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size_t page_y_offset = editor->page_y_offset;
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bool has_selection = !(editor->cursor_row == editor->select_row &&
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editor->cursor_column == editor->select_column);
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size_t viewport_select_x = select_x - page_x_offset;
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size_t viewport_select_y = select_y - page_y_offset;
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// Render this page of text.
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for ( size_t y = 0; y < editor->viewport_height; y++ )
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{
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size_t line_index = page_y_offset + y;
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struct terminal_datum* raw_data_line =
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state->data + (viewport_top + y) * state->width;
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struct terminal_datum* data_line = raw_data_line + viewport_left;
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struct line* line = line_index < editor->lines_used ?
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&editor->lines[line_index] : NULL;
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struct color_line* color_line = line_index < editor->color_lines_used ?
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&editor->color_lines[line_index] : NULL;
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size_t expanded_len;
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struct display_char* expanded
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= expand_tabs(line ? line->data : L"",
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line ? line->used : 0,
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color_line ? color_line->data : NULL,
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color_line ? color_line->length : 0,
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&expanded_len,
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editor->tabsize);
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const struct display_char* chars = expanded;
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size_t chars_length = expanded_len;
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if ( chars_length < page_x_offset )
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chars = NULL, chars_length = 0;
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else
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chars += page_x_offset, chars_length -= page_x_offset;
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for ( size_t x = 0; x < line_number_width; x++ )
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raw_data_line[x] = make_terminal_datum(L' ', 0x70);
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if ( editor->line_numbering && line_index < editor->lines_used )
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{
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char line_number[sizeof(size_t) * 3];
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snprintf(line_number, sizeof(line_number), "%zu", line_index + 1);
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size_t length = strlen(line_number);
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size_t offset = line_number_width - length;
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for ( size_t i = 0; i < length; i++ )
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raw_data_line[offset + i].character = btowc(line_number[i]);
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}
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for ( size_t x = 0; x < editor->viewport_width; x++ )
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{
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size_t column_index = page_x_offset + x;
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bool selected = (is_row_column_lt(cursor_y, cursor_x, select_y, select_x) &&
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is_row_column_le(cursor_y, cursor_x, line_index, column_index) &&
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is_row_column_lt(line_index, column_index, select_y, select_x)) ||
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(is_row_column_lt(select_y, select_x, cursor_y, cursor_x) &&
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is_row_column_le(select_y, select_x, line_index, column_index) &&
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is_row_column_lt(line_index, column_index, cursor_y, cursor_x));
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bool at_margin = column_index == editor->margin;
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bool is_blank = chars_length <= x;
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wchar_t c = is_blank ? L' ' : chars[x].character;
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uint8_t color = (is_blank ? 7 : chars[x].color);
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data_line[x] = selected && is_blank && at_margin ? make_terminal_datum(L'|', 0x41) :
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selected ? make_terminal_datum(c, 0x47) :
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is_blank && at_margin ? make_terminal_datum(L'|', 0x01) :
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make_terminal_datum(c, color);
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}
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free(expanded);
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}
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// Set the rest of the terminal state.
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if ( has_selection )
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{
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state->cursor_x = state->width;
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state->cursor_y = state->height;
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}
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else
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{
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state->cursor_x = viewport_left + viewport_select_x;
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state->cursor_y = viewport_top + viewport_select_y;
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}
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state->color = 0x07;
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if ( editor->mode == MODE_EDIT )
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return;
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const char* msg = "";
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if ( editor->mode == MODE_SAVE ||
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editor->mode == MODE_SAVE_LOAD ||
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editor->mode == MODE_SAVE_QUIT )
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msg = "File Name to Write: ";
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if ( editor->mode == MODE_LOAD )
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msg = "File Name to Read: ";
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if ( editor->mode == MODE_ASK_LOAD )
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msg = "Save modified file? (Y/N): ";
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if ( editor->mode == MODE_ASK_QUIT )
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msg = "Save modified file? (Y/N): ";
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if ( editor->mode == MODE_GOTO_LINE )
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msg = "Go to line: ";
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if ( editor->mode == MODE_COMMAND )
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msg = "Enter miscellaneous command: ";
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struct terminal_datum* data_line = state->data + (state->height - 1) * state->width;
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wchar_t* wcs_msg = convert_mbs_to_wcs(msg);
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size_t wcs_msg_len = wcslen(wcs_msg);
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for ( size_t i = 0; i < wcs_msg_len; i++ )
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if ( i < (size_t) state->width)
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data_line[i] = make_terminal_datum(wcs_msg[i], 0x70);
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free(wcs_msg);
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if ( (size_t) state->width <= wcs_msg_len )
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return;
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size_t modal_viewport_width = state->width - wcs_msg_len;
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size_t modal_viewport_cursor = editor->modal_cursor % modal_viewport_width;
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size_t modal_viewport_page = editor->modal_cursor / modal_viewport_width;
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size_t modal_viewport_offset = modal_viewport_page * modal_viewport_width;
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struct terminal_datum* modal_viewport_data = data_line + wcs_msg_len;
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const wchar_t* modal_chars = editor->modal;
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size_t modal_chars_length = editor->modal_used;
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if ( modal_chars_length < modal_viewport_offset )
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modal_chars = NULL,
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modal_chars_length = 0;
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else
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modal_chars += modal_viewport_offset,
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modal_chars_length -= modal_viewport_offset;
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for ( size_t x = 0; x < modal_viewport_width; x++ )
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{
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wchar_t c = x < modal_chars_length ? modal_chars[x] : L' ';
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uint16_t color = editor->modal_error ? 0x17 : 0x70;
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uint16_t tab_color = editor->modal_error ? 0x12 : 0x71;
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if ( c == L'\t' )
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modal_viewport_data[x] = make_terminal_datum(L'>', tab_color);
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else
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modal_viewport_data[x] = make_terminal_datum(c, color);
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}
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state->cursor_x = wcs_msg_len + modal_viewport_cursor;
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state->cursor_y = state->height - 1;
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state->color = 0x70;
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}
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