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/*
* Copyright (C) 2012-2017 Robin Haberkorn
*
* 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/>.
*/
#ifndef __DOCUMENT_H
#define __DOCUMENT_H
#include <glib.h>
#include <Scintilla.h>
#include "sciteco.h"
#include "memory.h"
#include "interface.h"
#include "undo.h"
namespace SciTECO {
/*
* Classes
*/
class Document : public Object {
typedef const void *SciDoc;
SciDoc doc;
/*
* The so called "parameters".
* Updated/restored only when required
*/
gint anchor, dot;
gint first_line, xoffset;
public:
Document() : doc(NULL)
{
reset();
}
virtual ~Document()
{
/*
* Cannot release document here, since we must
* do it on the same view that created it.
* We also cannot call get_create_document_view()
* since it is virtual.
* So we must demand that deriving classes call
* release_document() from their destructors.
*/
g_assert(doc == NULL);
}
inline bool
is_initialized(void)
{
return doc != NULL;
}
void edit(ViewCurrent &view);
void undo_edit(ViewCurrent &view);
void update(ViewCurrent &view);
inline void
update(const Document &from)
{
anchor = from.anchor;
dot = from.dot;
first_line = from.first_line;
xoffset = from.xoffset;
}
inline void
reset(void)
{
anchor = dot = 0;
first_line = xoffset = 0;
}
inline void
undo_reset(void)
{
undo.push_var(anchor);
undo.push_var(dot);
undo.push_var(first_line);
undo.push_var(xoffset);
}
void exchange(Document &other);
inline void
undo_exchange(void)
{
undo.push_var(doc);
undo_reset();
}
protected:
inline void
release_document(void)
{
if (is_initialized()) {
ViewCurrent &view = get_create_document_view();
view.ssm(SCI_RELEASEDOCUMENT, 0, (sptr_t)doc);
doc = NULL;
}
}
private:
/*
* Must be implemented by derived class.
* Documents must be released on the same view
* as they were created.
* Since we do not want to save this view
* per document, it must instead be returned by
* this method.
*/
virtual ViewCurrent &get_create_document_view(void) = 0;
inline void
maybe_create_document(void)
{
if (!is_initialized()) {
ViewCurrent &view = get_create_document_view();
doc = (SciDoc)view.ssm(SCI_CREATEDOCUMENT);
}
}
};
} /* namespace SciTECO */
#endif
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