src/BufferView.h

   1 // -*- C++ -*-
   2 /**
   3  * \file BufferView.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Alfredo Braustein
   8  * \author Lars Gullik Bjønnes
   9  * \author John Levon
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #ifndef BUFFER_VIEW_H
  16 #define BUFFER_VIEW_H
  17
  18 #include "support/types.h"
  19
  20 #include <boost/utility.hpp>
  21
  22 #include <string>
  23
  24 class Buffer;
  25 class Change;
  26 class DocIterator;
  27 class ErrorList;
  28 class FuncRequest;
  29 class FuncStatus;
  30 class Language;
  31 class LCursor;
  32 class LyXText;
  33 class LyXScreen;
  34 class LyXView;
  35 class Painter;
  36 class ParIterator;
  37
  38
  39 namespace Update {
  40         enum flags {
  41                 FitCursor = 1,
  42                 Force = 2,
  43                 SinglePar = 4
  44         };
  45
  46 inline flags operator|(flags const f, flags const g)
  47 {
  48         return static_cast<flags>(int(f) | int(g));
  49 }
  50
  51 inline flags operator&(flags const f, flags const g)
  52 {
  53         return static_cast<flags>(int(f) & int(g));
  54 }
  55
  56 } // namespace
  57
  58
  59 /**
  60  * A buffer view encapsulates a view onto a particular
  61  * buffer, and allows access to operate upon it. A view
  62  * is a sliding window of the entire document rendering.
  63  *
  64  * Eventually we will allow several views onto a single
  65  * buffer, but not yet.
  66  */
  67 class BufferView : boost::noncopyable {
  68 public:
  69         /**
  70          * Create a view with the given owner main window,
  71          * of the given dimensions.
  72          */
  73         BufferView(LyXView * owner, int w, int h);
  74
  75         ~BufferView();
  76
  77         /// set the buffer we are viewing
  78         void setBuffer(Buffer * b);
  79         /// return the buffer being viewed
  80         Buffer * buffer() const;
  81
  82         /// return the painter object for drawing onto the view
  83         Painter & painter() const;
  84         /// return the screen object for handling re-drawing
  85         LyXScreen & screen() const;
  86         /// return the owning main view
  87         LyXView * owner() const;
  88
  89         /// resize event has happened
  90         void resize();
  91
  92         /// reload the contained buffer
  93         void reload();
  94         /// create a new buffer based on template
  95         void newFile(std::string const & fname, std::string const & tname,
  96                      bool named = true);
  97         /// load a buffer into the view
  98         bool loadLyXFile(std::string const & name, bool tolastfiles = true);
  99
 100         /** perform pending painting updates. \c fitcursor means first
 101          *  to do a fitcursor, and to force an update if screen
 102          *  position changes. \c forceupdate means to force an update
 103          *  in any case.
 104          */
 105
 106         void update(Update::flags flags = Update::FitCursor | Update::Force);
 107         /// move the screen to fit the cursor. Only to be called with
 108         /// good y coordinates (after a bv::metrics)
 109         bool fitCursor();
 110         /// reset the scrollbar to reflect current view position
 111         void updateScrollbar();
 112
 113         /// FIXME
 114         bool available() const;
 115
 116         /// Save the current position as bookmark i
 117         void savePosition(unsigned int i);
 118         /// Restore the position from bookmark i
 119         void restorePosition(unsigned int i);
 120         /// does the given bookmark have a saved position ?
 121         bool isSavedPosition(unsigned int i);
 122
 123         /// return the current change at the cursor
 124         Change const getCurrentChange();
 125
 126         /// return the lyxtext we are using
 127         LyXText * getLyXText();
 128
 129         /// return the lyxtext we are using
 130         LyXText const * getLyXText() const;
 131
 132         /// simple replacing. Use the font of the first selected character
 133         void replaceSelectionWithString(std::string const & str);
 134
 135         /// move cursor to the named label
 136         void gotoLabel(std::string const & label);
 137
 138         /// get the stored error list
 139         ErrorList const & getErrorList() const;
 140         /// show the error list to the user
 141         void showErrorList(std::string const &) const;
 142         /// set the cursor based on the given TeX source row
 143         void setCursorFromRow(int row);
 144
 145         /// hide the cursor if it is visible
 146         void hideCursor();
 147
 148         /// center the document view around the cursor
 149         void center();
 150         /// scroll document by the given number of lines of default height
 151         void scroll(int lines);
 152         /// Scroll the view by a number of pixels
 153         void scrollDocView(int pixels);
 154
 155         /// return the pixel width of the document view
 156         int workWidth() const;
 157         /// return the pixel height of the document view
 158         int workHeight() const;
 159
 160         /// switch between primary and secondary keymaps for RTL entry
 161         void switchKeyMap();
 162
 163         /// get the contents of the window system clipboard
 164         std::string const getClipboard() const;
 165         /// fill the window system clipboard
 166         void stuffClipboard(std::string const &) const;
 167         /// tell the window system we have a selection
 168         void haveSelection(bool sel);
 169
 170         /// return true for events that will handle
 171         FuncStatus getStatus(FuncRequest const & cmd);
 172         /// execute the given function
 173         bool dispatch(FuncRequest const & argument);
 174
 175         /// clear the X selection
 176         void unsetXSel();
 177
 178         /// access to offset
 179         int offset_ref() const;
 180         /// access to anchor
 181         lyx::pit_type anchor_ref() const;
 182
 183         /// access to full cursor
 184         LCursor & cursor();
 185         /// access to full cursor
 186         LCursor const & cursor() const;
 187         ///
 188         LyXText * text() const;
 189         ///
 190         void setCursor(DocIterator const &);
 191         /* Sets the selection. When \c backwards == false, set anchor
 192          * to \c cur and cursor to \c cur + \c length. When \c
 193          * backwards == true, set anchor to \c cur and cursor to \c
 194          * cur + \c length.
 195          */
 196         void putSelectionAt(DocIterator const & cur,
 197                 int length, bool backwards);
 198
 199
 200 private:
 201         ///
 202         class Pimpl;
 203         ///
 204         friend class BufferView::Pimpl;
 205         ///
 206         Pimpl * pimpl_;
 207 };
 208
 209 #endif // BUFFERVIEW_H