lyx_mirror/src/LyXFunc.h
Jürgen Spitzmüller 8672364e1e * fix bug 4055, overdue patch from Stefan Schimanski:
"The idea of the beforeDispX/Y_ variables in the Cursor is to hold the position
of the cursor on screen before the lyxfunc is dispatched. But to get this the
metrics must be valid. It's updated in Cursor::dispatch before the dispatch
loop.
After inserting/deleting stuff (like when deleting the selected text before
inserting the alpha) the metrics are invalid. But the handler for the alpha
calls Cursor::dispatch after the deletion and hence the crash with your second
patch.

Here is a patch fixing that:

The beforeDispatchXY variable do not belong into the Cursor::dispatch because
Cursor::dispatch is often called "manually" by many handlers to some followup
action. So this logic must go somewhere else where it is sure that is not
updated after the metrics got invalidated."

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@22193 a592a061-630c-0410-9148-cb99ea01b6c8
2007-12-17 18:13:02 +00:00

162 lines
3.8 KiB
C++

// -*- C++ -*-
/**
* \file LyXFunc.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bjønnes
* \author Jean-Marc Lasgouttes
* \author John Levon
* \author André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#ifndef LYXFUNC_H
#define LYXFUNC_H
#include "KeySequence.h"
#include "lfuns.h"
#include "TextClassPtr.h"
#include "support/docstring.h"
namespace lyx {
class Buffer;
class BufferView;
class FuncRequest;
class FuncStatus;
class KeySymbol;
class Text;
namespace support {
class FileName;
}
namespace frontend {
class LyXView;
}
/** This class encapsulates all the LyX command operations.
This is the class of the LyX's "high level event handler".
Every user command is processed here, either invocated from
keyboard or from the GUI. All GUI objects, including buttons and
menus should use this class and never call kernel functions directly.
*/
class LyXFunc
{
public:
///
explicit LyXFunc();
/// LyX dispatcher, executes lyx actions.
void dispatch(FuncRequest const &);
///
void setLyXView(frontend::LyXView * lv);
///
void initKeySequences(KeyMap * kb);
/// return the status bar state string
docstring const viewStatusMessage();
///
void processKeySym(KeySymbol const & key, KeyModifier state);
///
FuncStatus getStatus(FuncRequest const & action) const;
/// The last key was meta
bool wasMetaKey() const;
/// True if lyxfunc reports an error
bool errorStat() const { return errorstat; }
/// Buffer to store result messages
void setMessage(docstring const & m) const;
/// Buffer to store result messages
void setErrorMessage(docstring const &) const;
/// Buffer to store result messages
docstring const getMessage() const { return dispatch_buffer; }
/// Handle a accented char key sequence
void handleKeyFunc(kb_action action);
/// goto a bookmark
/// openFile: whether or not open a file if the file is not opened
/// switchToBuffer: whether or not switch to buffer if the buffer is
/// not the current buffer
void gotoBookmark(unsigned int idx, bool openFile, bool switchToBuffer);
/// load a buffer into the current workarea.
Buffer * loadAndViewFile(support::FileName const & name, ///< File to load.
bool tolastfiles = true); ///< append to the "Open recent" menu?
/// cursor x position before dispatch started
int cursorBeforeDispatchX() const {
return cursorPosBeforeDispatchX_;
}
/// cursor y position before dispatch started
int cursorBeforeDispatchY() const {
return cursorPosBeforeDispatchY_;
}
private:
///
BufferView * view() const;
///
frontend::LyXView * lyx_view_;
/// the last character added to the key sequence, in UCS4 encoded form
char_type encoded_last_key;
///
KeySequence keyseq;
///
KeySequence cancel_meta_seq;
///
KeyModifier meta_fake_bit;
/// cursor position before dispatch started
int cursorPosBeforeDispatchX_;
int cursorPosBeforeDispatchY_;
/// Error status, only Dispatch can change this flag
mutable bool errorstat;
/** Buffer to store messages and result data. Is there a
good reason to have this one as static in Dispatch? (Ale)
*/
mutable docstring dispatch_buffer;
/// send a post-dispatch status message
void sendDispatchMessage(docstring const & msg,
FuncRequest const & ev);
///
void open(std::string const &);
///
void doImport(std::string const &);
///
void closeBuffer();
///
void reloadBuffer();
///
bool ensureBufferClean(BufferView * bv);
///
void updateLayout(TextClassPtr const & oldlayout, Buffer * buffer);
};
/// Implementation is in LyX.cpp
extern LyXFunc & theLyXFunc();
/// Implementation is in LyX.cpp
extern FuncStatus getStatus(FuncRequest const & action);
/// Implementation is in LyX.cpp
extern void dispatch(FuncRequest const & action);
} // namespace lyx
#endif