GOB: Add a simple class for PreGob TXT files

1 files changed, 232 insertions, 0 deletions

diff --git a/engines/gob/pregob/txtfile.cpp b/engines/gob/pregob/txtfile.cpp
new file mode 100644
index 0000000000..3ff0d4b039
--- /dev/null
+++ b/engines/gob/pregob/txtfile.cpp
@@ -0,0 +1,232 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "common/stream.h"
+
+#include "gob/draw.h"
+
+#include "gob/pregob/txtfile.h"
+
+namespace Gob {
+
+TXTFile::TXTFile(Common::SeekableReadStream &txt, Format format) {
+	load(txt, format);
+}
+
+TXTFile::~TXTFile() {
+}
+
+TXTFile::LineArray &TXTFile::getLines() {
+	return _lines;
+}
+
+void TXTFile::load(Common::SeekableReadStream &txt, Format format) {
+	if (format == kFormatStringPositionColorFont) {
+		int numLines = getInt(txt);
+
+		_lines.reserve(numLines);
+	}
+
+	while (!txt.eos()) {
+		Line line;
+
+		line.text  =                                              getStr(txt);
+		line.x     = (format >= kFormatStringPosition)          ? getInt(txt) : 0;
+		line.y     = (format >= kFormatStringPosition)          ? getInt(txt) : 0;
+		line.color = (format >= kFormatStringPositionColor)     ? getInt(txt) : 0;
+		line.font  = (format >= kFormatStringPositionColorFont) ? getInt(txt) : 0;
+
+		_lines.push_back(line);
+	}
+
+	while (!_lines.empty() && _lines.back().text.empty())
+		_lines.pop_back();
+}
+
+bool TXTFile::draw(Surface &surface, int16 &left, int16 &top, int16 &right, int16 &bottom,
+                   const Font * const *fonts, uint fontCount, int color) {
+
+	trashBuffer();
+
+	if (!getArea(left, top, right, bottom, fonts, fontCount))
+		return false;
+
+	resizeBuffer(right - left + 1, bottom - top + 1);
+	saveScreen(surface, left, top, right, bottom);
+
+	for (LineArray::const_iterator l = _lines.begin(); l != _lines.end(); ++l) {
+		if (l->font >= fontCount)
+			continue;
+
+		fonts[l->font]->drawString(l->text, l->x, l->y, (color < 0) ? l->color : color, 0, true, surface);
+	}
+
+	return true;
+}
+
+bool TXTFile::draw(uint line, Surface &surface, int16 &left, int16 &top, int16 &right, int16 &bottom,
+                   const Font * const *fonts, uint fontCount, int color) {
+
+	trashBuffer();
+
+	if (!getArea(line, left, top, right, bottom, fonts, fontCount))
+		return false;
+
+	resizeBuffer(right - left + 1, bottom - top + 1);
+	saveScreen(surface, left, top, right, bottom);
+
+	const Line &l = _lines[line];
+
+	fonts[l.font]->drawString(l.text, l.x, l.y, (color < 0) ? l.color : color, 0, true, surface);
+
+	return true;
+}
+
+bool TXTFile::draw(Surface &surface, const Font * const *fonts, uint fontCount, int color) {
+	int16 left, top, right, bottom;
+
+	return draw(surface, left, top, right, bottom, fonts, fontCount, color);
+}
+
+bool TXTFile::draw(uint line, Surface &surface, const Font * const *fonts, uint fontCount, int color) {
+	int16 left, top, right, bottom;
+
+	return draw(line, surface, left, top, right, bottom, fonts, fontCount, color);
+}
+
+bool TXTFile::clear(Surface &surface, int16 &left, int16 &top, int16 &right, int16 &bottom) {
+	return restoreScreen(surface, left, top, right, bottom);
+}
+
+bool TXTFile::getArea(int16 &left, int16 &top, int16 &right, int16 &bottom,
+                      const Font * const *fonts, uint fontCount) const {
+
+	bool hasLine = false;
+
+	left   = 0x7FFF;
+	top    = 0x7FFF;
+	right  = 0x0000;
+	bottom = 0x0000;
+
+	for (uint i = 0; i < _lines.size(); i++) {
+		int16 lLeft, lTop, lRight, lBottom;
+
+		if (getArea(i, lLeft, lTop, lRight, lBottom, fonts, fontCount)) {
+			left   = MIN(left  , lLeft  );
+			top    = MIN(top   , lTop   );
+			right  = MAX(right , lRight );
+			bottom = MAX(bottom, lBottom);
+
+			hasLine = true;
+		}
+	}
+
+	return hasLine;
+}
+
+bool TXTFile::getArea(uint line, int16 &left, int16 &top, int16 &right, int16 &bottom,
+                      const Font * const *fonts, uint fontCount) const {
+
+
+	if ((line >= _lines.size()) || (_lines[line].font >= fontCount))
+		return false;
+
+	const Line &l = _lines[line];
+
+	left   = l.x;
+	top    = l.y;
+	right  = l.x + l.text.size() * fonts[l.font]->getCharWidth()  - 1;
+	bottom = l.y +                 fonts[l.font]->getCharHeight() - 1;
+
+	return true;
+}
+
+Common::String TXTFile::getStr(Common::SeekableReadStream &txt) {
+	// Skip all ' ', '\n' and '\r'
+	while (!txt.eos()) {
+		char c = txt.readByte();
+		if (txt.eos())
+			break;
+
+		if ((c != ' ') && (c != '\n') && (c != '\r')) {
+			txt.seek(-1, SEEK_CUR);
+			break;
+		}
+	}
+
+	if (txt.eos())
+		return "";
+
+	// Read string until ' ', '\n' or '\r'
+	Common::String string;
+	while (!txt.eos()) {
+		char c = txt.readByte();
+		if ((c == ' ') || (c == '\n') || (c == '\r'))
+			break;
+
+		string += c;
+	}
+
+	// Replace all '#' with ' ' and throw out non-printables
+	Common::String cleanString;
+
+	for (uint i = 0; i < string.size(); i++) {
+		if      (string[i] == '#')
+			cleanString += ' ';
+		else if ((unsigned char)string[i] >= ' ')
+			cleanString += string[i];
+	}
+
+	return cleanString;
+}
+
+int TXTFile::getInt(Common::SeekableReadStream &txt) {
+	// Skip all [^-0-9]
+	while (!txt.eos()) {
+		char c = txt.readByte();
+		if (txt.eos())
+			break;
+
+		if ((c == '-') || ((c >= '0') && (c <= '9'))) {
+			txt.seek(-1, SEEK_CUR);
+			break;
+		}
+	}
+
+	if (txt.eos())
+		return 0;
+
+	// Read until [^-0-9]
+	Common::String string;
+	while (!txt.eos()) {
+		char c = txt.readByte();
+		if ((c != '-') && ((c < '0') || (c > '9')))
+			break;
+
+		string += c;
+	}
+
+	// Convert to integer
+	return atoi(string.c_str());
+}
+
+} // End of namespace Gob