154 lines
3.8 KiB
C++
154 lines
3.8 KiB
C++
/*
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* Copyright (C) OpenTX
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*
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* Based on code named
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* th9x - http://code.google.com/p/th9x
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* er9x - http://code.google.com/p/er9x
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* gruvin9x - http://code.google.com/p/gruvin9x
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*
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* License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "opentx.h"
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#define TEXT_FILE_MAXSIZE 2048
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char s_text_file[TEXT_FILENAME_MAXLEN];
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char s_text_screen[LCD_LINES-1][LCD_COLS+1];
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void readTextFile(int & lines_count)
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{
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FIL file;
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int result;
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char c;
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unsigned int sz;
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int line_length = 0;
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int escape = 0;
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char escape_chars[4] = {0};
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int current_line = 0;
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memset(s_text_screen, 0, sizeof(s_text_screen));
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result = f_open(&file, s_text_file, FA_OPEN_EXISTING | FA_READ);
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if (result == FR_OK) {
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for (int i=0; i<TEXT_FILE_MAXSIZE && f_read(&file, &c, 1, &sz)==FR_OK && sz==1 && (lines_count==0 || current_line-menuVerticalOffset<LCD_LINES-1); i++) {
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if (c == '\n') {
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++current_line;
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line_length = 0;
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escape = 0;
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}
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else if (c!='\r' && current_line>=menuVerticalOffset && current_line-menuVerticalOffset<LCD_LINES-1 && line_length<LCD_COLS) {
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if (c=='\\' && escape==0) {
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escape = 1;
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continue;
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}
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else if (c!='\\' && escape>0 && escape<4) {
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escape_chars[escape-1] = c;
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if (escape == 2 && !strncmp(escape_chars, "up", 2)) {
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c = '\300';
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escape = 0;
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}
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else if (escape == 2 && !strncmp(escape_chars, "dn", 2)) {
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c = '\301';
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escape = 0;
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}
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else if (escape == 3) {
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int val = atoi(escape_chars);
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if (val >= 200 && val < 225) {
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c = '\200' + val-200;
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}
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escape = 0;
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}
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else {
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escape++;
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continue;
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}
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}
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else if (c=='~') {
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c = 'z'+1;
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}
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else if (c=='\t') {
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c = 0x1D; //tab
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}
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escape = 0;
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s_text_screen[current_line-menuVerticalOffset][line_length++] = c;
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}
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}
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if (c != '\n') {
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current_line += 1;
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}
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f_close(&file);
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}
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if (lines_count == 0) {
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lines_count = current_line;
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}
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}
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void menuTextView(event_t event)
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{
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static int lines_count;
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switch (event) {
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case EVT_ENTRY:
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menuVerticalOffset = 0;
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lines_count = 0;
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readTextFile(lines_count);
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break;
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case EVT_KEY_FIRST(KEY_UP):
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if (menuVerticalOffset == 0)
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break;
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else
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menuVerticalOffset--;
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readTextFile(lines_count);
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break;
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case EVT_KEY_FIRST(KEY_DOWN):
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if (menuVerticalOffset+LCD_LINES-1 >= lines_count)
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break;
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else
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++menuVerticalOffset;
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readTextFile(lines_count);
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break;
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case EVT_KEY_BREAK(KEY_EXIT):
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popMenu();
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break;
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}
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for (int i=0; i<LCD_LINES-1; i++) {
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lcdDrawText(0, i*FH+FH+1, s_text_screen[i], FIXEDWIDTH);
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}
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char *title = s_text_file;
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#if defined(SIMU)
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if (!strncmp(title, "./", 2)) title += 2;
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#else
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// TODO?
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#endif
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lcdDrawText(LCD_W/2-strlen(title)*FW/2, 0, title);
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lcdInvertLine(0);
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if (lines_count > LCD_LINES-1) {
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drawVerticalScrollbar(LCD_W-1, FH, LCD_H-FH, menuVerticalOffset, lines_count, LCD_LINES-1);
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}
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}
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void pushMenuTextView(const char *filename)
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{
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if (strlen(filename) < TEXT_FILENAME_MAXLEN) {
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strcpy(s_text_file, filename);
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pushMenu(menuTextView);
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}
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}
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