terminal.cpp

00001 /*
00002  * mbed LCDWindow library
00003 * Copyright (c) 2010 Hendrik Lipka
00004 *
00005 * Permission is hereby granted, free of charge, to any person obtaining a copy
00006 * of this software and associated documentation files (the "Software"), to deal
00007 * in the Software without restriction, including without limitation the rights
00008 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00009 * copies of the Software, and to permit persons to whom the Software is
00010 * furnished to do so, subject to the following conditions:
00011 *
00012 * The above copyright notice and this permission notice shall be included in
00013 * all copies or substantial portions of the Software.
00014 *
00015 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00016 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00017 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00018 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00019 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00020 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00021 * THE SOFTWARE.
00022 */
00023 
00024 #include "terminal.h"
00025 #include "string.h"
00026 
00027 Terminal::Terminal (Window* window):Window()
00028 {
00029     _window=window;
00030     _columns=window->getColumns ();
00031     _rows=window->getRows ();
00032     _lineBuffer=new char*[_rows];
00033     _enabled = true;
00034     clear();
00035 }
00036 
00037 char* Terminal::createLine()
00038 {
00039     char* text=new char[_columns+1];
00040     memset(text,32,_columns);
00041     text[_columns]=0;
00042     return text;
00043 }
00044 
00045 void Terminal::character(int column, int row, int c)
00046 {
00047     if (column>_columns || row > _rows) {
00048         return;
00049     }
00050     _lineBuffer[row][column]=c;
00051     if (_enabled) {
00052         _window->character(column,row,c);
00053     }
00054 
00055 }
00056 
00057 void Terminal::writeText(const unsigned int column, const unsigned int row, const char text[])
00058 {
00059     if (_enabled) {
00060         _window->writeText(column,row,text);
00061     }
00062     int min=column+strlen(text);
00063     if (min>_columns)
00064         min=_columns;
00065     for (int i=column; i<min; i++) {
00066         _lineBuffer[row][i]=text[i-column]; // copy text into proper line
00067     }
00068 }
00069 
00070 void Terminal::addText(const char text[])
00071 {
00072     delete [] _lineBuffer[0];
00073     for (int i=0; i<_rows-1; i++) {
00074         _lineBuffer[i]=_lineBuffer[i+1];
00075     }
00076     _lineBuffer[_rows-1]=createLine();
00077     memset(_lineBuffer[_rows-1],32,_columns);
00078     int min=strlen(text);
00079     if (min>_columns)
00080         min=_columns;
00081     for (int i=0; i<min; i++) {
00082         _lineBuffer[_rows-1][i]=text[i]; // copy text into proper line
00083     }
00084     if (_enabled) {
00085         _window->clear();
00086         for (int i=0; i<_rows; i++) {
00087             _window->writeText(0,i,_lineBuffer[i]);
00088         }
00089     }
00090     // text longer than line?
00091     if (strlen(text) > _columns) {
00092         // add the remaining text to the next Line
00093         this->addText(text + _columns);
00094     }
00095 }
00096 
00097 void Terminal::clear()
00098 {
00099     for (int i=0; i<_rows; i++) {
00100         _lineBuffer[i]=createLine();
00101     }
00102     if (_enabled) {
00103         _window->clear();
00104     }
00105 }
00106 
00107 void Terminal::disableDisplay()
00108 {
00109     if (_enabled) {
00110         _enabled = false;
00111         _window->clear();
00112     }
00113 }
00114 
00115 void Terminal::enableDisplay()
00116 {
00117     if (! _enabled) {
00118         _enabled = true;
00119         _window->clear();
00120         //Display the buffer-content
00121         for (int i=0; i<_rows; i++) {
00122             _window->writeText(0,i,_lineBuffer[i]);
00123         }
00124     }
00125 }