lib/unigraphic/TextDisplay.cpp

Mon, 11 Mar 2024 15:35:36 +0100

author
David Douard <david.douard@sdf3.org>
date
Mon, 11 Mar 2024 15:35:36 +0100
changeset 71
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parent 5
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permissions
-rw-r--r--

Add links to sr.ht repos and add an image in the README file

5
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1 /* mbed TextDisplay Display Library Base Class
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2 * Copyright (c) 2007-2009 sford
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3 * Released under the MIT License: http://mbed.org/license/mit
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4 */
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5
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6 #include "TextDisplay.h"
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7
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8 TextDisplay::TextDisplay(const char *name) : Stream(name){
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9 _row = 0;
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10 _column = 0;
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11 if (name == NULL) {
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12 _path = NULL;
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13 } else {
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14 _path = new char[strlen(name) + 2];
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15 sprintf(_path, "/%s", name);
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16 }
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17 }
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18
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19 int TextDisplay::_putc(int value) {
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20 if(value == '\n') {
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21 _column = 0;
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22 _row++;
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23 if(_row >= rows()) {
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24 _row = 0;
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25 }
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26 } else {
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27 character(_column, _row, value);
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28 _column++;
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29 if(_column >= columns()) {
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30 _column = 0;
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31 _row++;
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32 if(_row >= rows()) {
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33 _row = 0;
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34 }
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35 }
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36 }
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37 return value;
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38 }
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39
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40 // crude cls implementation, should generally be overwritten in derived class
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41 void TextDisplay::cls() {
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42 locate(0, 0);
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43 for(int i=0; i<columns()*rows(); i++) {
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44 putc(' ');
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45 }
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46 }
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47
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48 void TextDisplay::locate(int column, int row) {
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49 _column = column;
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50 _row = row;
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51 }
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52
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53 int TextDisplay::_getc() {
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54 return -1;
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55 }
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56
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57 void TextDisplay::foreground(uint16_t colour) {
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58 _foreground = colour;
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59 }
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60
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61 void TextDisplay::background(uint16_t colour) {
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62 _background = colour;
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63 }
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64
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65 bool TextDisplay::claim (FILE *stream) {
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66 if ( _path == NULL) {
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67 fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
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68 return false;
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69 }
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70 if (freopen(_path, "w", stream) == NULL) {
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71 // Failed, should not happen
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72 return false;
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73 }
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74 // make sure we use line buffering
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75 setvbuf(stdout, NULL, _IOLBF, columns());
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76 return true;
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77 }

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