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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
* Based on ScottFree interpreter version 1.14 developed by Swansea
* University Computer Society without disassembly of any other game
* drivers, only of game databases as permitted by EEC law (for purposes
* of compatibility).
*
* Licensed under GPLv2
*
* https://github.com/angstsmurf/spatterlight/tree/master/terps/scott
*/
#include "common/util.h"
#include "glk/scott/layout_text.h"
namespace Glk {
namespace Scott {
int findBreak(const char *buf, int pos, int columns) {
int diff = 0;
while (diff < columns && !Common::isSpace((unsigned char)buf[pos])) {
pos--;
diff++;
}
if (diff >= columns || diff < 1) /* Found no space */ {
return -1;
}
return diff;
}
/* Breaks a null-terminated string up by inserting newlines, moving words
down to the next line when reaching the end of the line */
char *lineBreakText(char *source, int columns, int *rows, int *length) {
columns -= 1;
char *result = nullptr;
char buf[768];
int col = 0;
int row = 0;
int sourcepos = 0;
int destpos = 0;
int diff = 0;
*rows = 0;
while (source[sourcepos] != '\0') {
while (col < columns && source[sourcepos] != '\0') {
if (source[sourcepos] == 10 || source[sourcepos] == 13) {
/* Found a line break. */
/* Any spaces before a line break may cause trouble, */
/* so we delete them */
while (destpos && buf[destpos - 1] == ' ') {
destpos--;
}
col = 0;
row++;
} else {
col++;
}
buf[destpos++] = source[sourcepos++];
if (source[sourcepos] == 10 || source[sourcepos] == 13)
col--;
}
/* We have reached the end of a line */
row++;
col = 0;
if (source[sourcepos] == '\0') {
break;
}
diff = findBreak(source, sourcepos, columns);
if (diff > -1) { /* We found a suitable break */
sourcepos = sourcepos - diff;
destpos = destpos - diff;
buf[destpos++] = '\n';
if (Common::isSpace((unsigned char)source[sourcepos])) {
sourcepos++;
}
}
}
*rows = row;
*length = 0;
result = new char[destpos + 1];
if (result == nullptr)
return nullptr;
memcpy(result, buf, destpos);
result[destpos] = '\0';
*length = destpos;
return result;
}
} // End of namespace Scott
} // End of namespace Glk
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