src/LyXFunc.h

   1 // -*- C++ -*-
   2 /**
   3  * \file LyXFunc.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Lars Gullik Bjønnes
   8  * \author Jean-Marc Lasgouttes
   9  * \author John Levon
  10  * \author André Pönitz
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #ifndef LYXFUNC_H
  16 #define LYXFUNC_H
  17
  18 #include "FuncCode.h"
  19 #include "KeySequence.h"
  20
  21 #include "support/docstring.h"
  22
  23 namespace lyx {
  24
  25 class Buffer;
  26 class BufferView;
  27 class DocumentClass;
  28 class FuncRequest;
  29 class FuncStatus;
  30 class KeySymbol;
  31 class Text;
  32
  33 namespace support {
  34 class FileName;
  35 }
  36
  37 namespace frontend {
  38 class LyXView;
  39 }
  40
  41 /** This class encapsulates all the LyX command operations.
  42     This is the class of the LyX's "high level event handler".
  43     Every user command is processed here, either invocated from
  44     keyboard or from the GUI. All GUI objects, including buttons and
  45     menus should use this class and never call kernel functions directly.
  46 */
  47 class LyXFunc
  48 {
  49 public:
  50         ///
  51         explicit LyXFunc();
  52
  53         /// LyX dispatcher, executes lyx actions.
  54         void dispatch(FuncRequest const &);
  55
  56         ///
  57         void setLyXView(frontend::LyXView * lv);
  58
  59         ///
  60         void initKeySequences(KeyMap * kb);
  61
  62         /// return the status bar state string
  63         docstring viewStatusMessage();
  64
  65         ///
  66         void processKeySym(KeySymbol const & key, KeyModifier state);
  67
  68         ///
  69         FuncStatus getStatus(FuncRequest const & action) const;
  70
  71         /// The last key was meta
  72         bool wasMetaKey() const;
  73
  74         /// True if lyxfunc reports an error
  75         bool errorStat() const { return errorstat; }
  76         /// Buffer to store result messages
  77         void setMessage(docstring const & m) const;
  78         /// Buffer to store result messages
  79         void setErrorMessage(docstring const &) const;
  80         /// Buffer to store result messages
  81         docstring const getMessage() const { return dispatch_buffer; }
  82         /// Handle a accented char key sequence
  83         void handleKeyFunc(FuncCode action);
  84         /// goto a bookmark
  85         /// openFile: whether or not open a file if the file is not opened
  86         /// switchToBuffer: whether or not switch to buffer if the buffer is
  87         ///             not the current buffer
  88         void gotoBookmark(unsigned int idx, bool openFile, bool switchToBuffer);
  89
  90         /// cursor x position before dispatch started
  91         int cursorBeforeDispatchX() const { return cursorPosBeforeDispatchX_; }
  92         /// cursor y position before dispatch started
  93         int cursorBeforeDispatchY() const { return cursorPosBeforeDispatchY_; }
  94
  95 private:
  96         ///
  97         BufferView * view() const;
  98
  99         ///
 100         frontend::LyXView * lyx_view_;
 101
 102         /// the last character added to the key sequence, in UCS4 encoded form
 103         char_type encoded_last_key;
 104
 105         ///
 106         KeySequence keyseq;
 107         ///
 108         KeySequence cancel_meta_seq;
 109         ///
 110         KeyModifier meta_fake_bit;
 111
 112         /// cursor position before dispatch started
 113         int cursorPosBeforeDispatchX_;
 114         int cursorPosBeforeDispatchY_;
 115
 116         /// Error status, only Dispatch can change this flag
 117         mutable bool errorstat;
 118
 119         /** Buffer to store messages and result data. Is there a
 120             good reason to have this one as static in Dispatch? (Ale)
 121         */
 122         mutable docstring dispatch_buffer;
 123
 124         /// send a post-dispatch status message
 125         void sendDispatchMessage(docstring const & msg,
 126                 FuncRequest const & ev);
 127
 128         ///
 129         void reloadBuffer();
 130         ///
 131         bool ensureBufferClean(BufferView * bv);
 132         ///
 133         void updateLayout(DocumentClass const * const oldlayout, Buffer * buffer);
 134 };
 135
 136 /// Implementation is in LyX.cpp
 137 extern LyXFunc & theLyXFunc();
 138
 139 /// Implementation is in LyX.cpp
 140 extern FuncStatus getStatus(FuncRequest const & action);
 141
 142 /// Implementation is in LyX.cpp
 143 extern void dispatch(FuncRequest const & action);
 144
 145 } // namespace lyx
 146
 147 #endif