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/* Copyright (C) 2006-2008 Constantin Kaplinsky. All Rights Reserved.
*
* This 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 software 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 software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
//
// Geometry.cxx
//
#include <rfb/LogWriter.h>
#include <x0vncserver/Geometry.h>
static LogWriter vlog("Geometry");
StringParameter Geometry::m_geometryParam("Geometry",
"Screen area shown to VNC clients. "
"Format is <width>x<height>+<offset_x>+<offset_y>, "
"more information in man X, section GEOMETRY SPECIFICATIONS. "
"If the argument is empty, full screen is shown to VNC clients.",
"");
StringParameter Geometry::m_videoAreaParam("VideoArea",
"Screen area to be handled as video. "
"Format is <width>x<height>+<offset_x>+<offset_y>.",
"");
Geometry::Geometry(int fullWidth, int fullHeight)
: m_fullWidth(fullWidth),
m_fullHeight(fullHeight),
m_rect(0, 0, fullWidth, fullHeight)
{
// Parse geometry specification and save the result in m_rect.
const char *param = m_geometryParam.getData();
bool geometrySpecified = (strlen(param) > 0);
if (geometrySpecified) {
m_rect = parseString(param);
}
delete[] param; // don't forget to deallocate memory
// allocated by StringParameter::getData()
if (m_rect.is_empty()) {
vlog.info("Desktop geometry is invalid");
return; // further processing does not make sense
}
// Everything went good so far.
vlog.info("Desktop geometry is set to %dx%d+%d+%d",
width(), height(), offsetLeft(), offsetTop());
// Handle the VideoArea parameter, save the result in m_videoRect.
// Note that we log absolute coordinates but save relative ones.
param = m_videoAreaParam.getData();
bool videoAreaSpecified = (strlen(param) > 0);
if (videoAreaSpecified) {
Rect absVideoRect = parseString(param);
if (!absVideoRect.is_empty()) {
vlog.info("Video area set to %dx%d+%d+%d",
absVideoRect.width(), absVideoRect.height(),
absVideoRect.tl.x, absVideoRect.tl.y);
Point base(-offsetLeft(), -offsetTop());
m_videoRect = absVideoRect.translate(base);
} else {
vlog.info("Video area was not set");
m_videoRect.clear();
}
}
delete[] param;
}
Rect Geometry::parseString(const char *arg) const
{
Rect result; // empty by default
if (arg != NULL && strlen(arg) > 0) {
int w, h;
int x = 0, y = 0;
char sign_x[2] = "+";
char sign_y[2] = "+";
int n = sscanf(arg, "%dx%d%1[+-]%d%1[+-]%d",
&w, &h, sign_x, &x, sign_y, &y);
if ((n == 2 || n == 6) && w > 0 && h > 0 && x >= 0 && y >= 0) {
if (sign_x[0] == '-')
x = m_fullWidth - w - x;
if (sign_y[0] == '-')
y = m_fullHeight - h - y;
Rect partRect(x, y, x + w, y + h);
result = partRect.intersect(m_rect);
if (result.area() <= 0) {
vlog.error("Requested area is out of the desktop boundaries");
result.clear();
}
} else {
vlog.error("Wrong argument format");
}
} else {
vlog.error("Missing argument");
}
return result;
}
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