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/**
* @file geis_touch.c
* @brief Geis touch module implementation
*
* Copyright 2011 Canonical Ltd.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option) any
* later version.
*
* This library 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "geis_config.h"
#include "geis_touch.h"
#include "geis_attr.h"
#include "geis_logging.h"
#include <stdlib.h>
struct _GeisTouch
{
GeisTouch next;
GeisTouchId id;
GeisAttrBag attr_bag;
};
struct _GeisTouchSet
{
GeisSize count;
GeisTouch first;
};
/*
* Creates a new, empty touch set.
*/
GeisTouchSet
geis_touchset_new()
{
GeisTouchSet touchset = calloc(1, sizeof(struct _GeisTouchSet));
if (!touchset)
{
geis_error("error allocating touch set");
goto final_exit;
}
final_exit:
return touchset;
}
/*
* Destroys a touch set and all touches contained in it.
*/
void
geis_touchset_delete(GeisTouchSet touchset)
{
GeisTouch p = touchset->first;
while (p)
{
GeisTouch tmp = p->next;
geis_touch_delete(p);
p = tmp;
}
free(touchset);
}
/*
* Inserts a touch into a touch set.
*/
GeisStatus
geis_touchset_insert(GeisTouchSet touchset, GeisTouch touch)
{
if (touchset->count == 0)
{
touchset->first = touch;
}
else
{
GeisTouch p = touchset->first;
while (p->next)
p = p->next;
p->next = touch;
}
++touchset->count;
return GEIS_STATUS_SUCCESS;
}
GeisSize
geis_touchset_touch_count(GeisTouchSet touchset)
{
return touchset->count;
}
GeisTouch
geis_touchset_touch(GeisTouchSet touchset, GeisSize index)
{
GeisTouch touch = NULL;
if (index >= touchset->count)
{
geis_warning("touch set index out of range");
}
else
{
GeisSize i;
touch = touchset->first;
for (i = 0; i < index; ++i)
{
touch = touch->next;
}
}
return touch;
}
GeisTouch
geis_touchset_touch_by_id(GeisTouchSet touchset, GeisTouchId touchid)
{
GeisTouch result = NULL;
GeisTouch touch = touchset->first;
while (touch)
{
if (touch->id == touchid)
{
result = touch;
break;
}
touch = touch->next;
}
return result;
}
/*
* Creates a new gesture touch.
*/
GeisTouch
geis_touch_new(GeisTouchId id)
{
GeisTouch touch = calloc(1, sizeof(struct _GeisTouch));
if (!touch)
{
geis_error("error allocating touch");
goto final_exit;
}
touch->attr_bag = geis_attr_bag_new(2);
if (!touch->attr_bag)
{
geis_error("error allocating touch attr bag");
goto unwind_touch;
}
touch->id = id;
goto final_exit;
unwind_touch:
free(touch);
touch = NULL;
final_exit:
return touch;
}
/*
* Destroys a gesture touch and all gesture frames contained in it.
*/
void
geis_touch_delete(GeisTouch touch)
{
geis_attr_bag_delete(touch->attr_bag);
free(touch);
}
/*
* Gets the identifier of a gesture touch.
*/
GeisTouchId
geis_touch_id(GeisTouch touch)
{
return touch->id;
}
/*
* Inserts an attr.
*/
GeisStatus
geis_touch_add_attr(GeisTouch touch, GeisAttr attr)
{
return geis_attr_bag_insert(touch->attr_bag, attr);
}
/*
* Gets the number of attrs associated with a touch.
*/
GeisSize
geis_touch_attr_count(GeisTouch touch)
{
return geis_attr_bag_count(touch->attr_bag);
}
/*
* Gets an indicated attr from a touch.
*/
GeisAttr
geis_touch_attr(GeisTouch touch, GeisSize index)
{
return geis_attr_bag_attr(touch->attr_bag, index);
}
/*
* Gets a named attr from a touch.
*/
GeisAttr
geis_touch_attr_by_name(GeisTouch touch, GeisString name)
{
return geis_attr_bag_find(touch->attr_bag, name);
}
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