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19024f7255
Get the default language by a mix of QLocale and LyXRC::gui_language
Known limitations:
* encoding is supposed to be UTF-8 (the charset parameter is checked);
* context is not handled (implemented differently in LyX);
* plural forms not implemented (not used for now in LyX);.
* tThe byte endianness of the machine on which the .mo file have been
built is expected to be the same as the one of the machine where this
code is run.
269 lines
8.1 KiB
C++
269 lines
8.1 KiB
C++
/**
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* \file frontend/Application.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Abdelrazak Younes
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef APPLICATION_H
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#define APPLICATION_H
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#include "ColorCode.h"
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#include "FuncCode.h"
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#include "KeyModifier.h"
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#include "support/strfwd.h"
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#include <boost/function.hpp>
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#include <vector>
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namespace lyx {
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class BufferView;
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class Buffer;
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class DispatchResult;
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class docstring_list;
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class FuncRequest;
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class FuncStatus;
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class Inset;
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class Lexer;
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struct RGBColor;
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namespace frontend {
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class Clipboard;
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class FontLoader;
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class Selection;
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/// The main application class
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/**
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There should be only one instance of this class. No Qt object
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initialisation should be done before the instanciation of this class.
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Model/View/Controller separation at frontend level in LyX-qt4:
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BufferList (N Buffers)
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Buffer-a
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Buffer-b
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Buffer-c
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Buffer-d
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Application (this is the frontend really, should probably be renamed).
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GuiView-1 (one or more in case of split-view mode).
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| |
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| <tab-widget-1-1>
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| | |
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| | WorkArea-1-1-1 (M1-1 WorkAreas, M1-1 <= N)
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| | | |
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| | | BufferView <-----------> Buffer-c
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| | | |
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| | | Cursor
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| | WorkArea-1-1-2
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| | | BufferView <-----------> Buffer-a
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| | | |
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| | | Cursor
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| <tab-widget-1-2>
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GuiView-2 (one or more in case of split-view mode).
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| <tab-widget-2-1>
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| | |
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| | WorkArea-2-1-1 (M2-1 WorkAreas, M2-1 <= N, M2-1 independent of M1-1)
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...
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1) The Model: \c Buffer
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The Buffer is the in-memory representation of a LyX file format. The
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Buffer does not (should not) have any information on what part of it
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is represented on screen. There is one unique Buffer per opened LyX
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file. A Buffer may or may not be represented on screen; typically, a
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child document does not have an associated BufferView unless the user
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choose to visualize it.
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2) The Controller: \c BufferView / \c Painter \c Cursor
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The BufferView is a tool used by the view (\sa WorkArea) that
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translates a part of the Buffer contents into drawing routines. The
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BufferView asks each inset of the Buffer to draw itself onto the
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screen using the Painter. There can be only one Buffer displayed in
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a BufferView and it is set on construction. Ideally, a BufferView
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should not be able to change the contents of its associated Buffer.
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A BufferView is instanciated and destroyed by a \c WorkArea; it is
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automatically destroyed by the parent WorkArea when its Buffer is
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closed.
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\todo Move all Buffer changing LFUN to Buffer::dispatch(),
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LyXFunc::dispatch() or Cursor::dispatch().
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\todo BufferView::buffer() should only offer const access.
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The \c Painter is just a virtual interface to formalize each kind of
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drawing routines (text, line, rectangle, etc).
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The \c BufferView also contains a Cursor which may or may not be
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visible on screen. The cursor is really just a bookmark to remember
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where the next Buffer insertion/deletion is going to take place.
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3) The View: \c WorkArea (and it's qt4 specialisation GuiWorkArea)
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This contains the real screen area where the drawing is done by the
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Painter. One WorkArea holds one unique \c BufferView. While it could
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be possible that multiple WorkArea share one BufferView, this is not
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something desirable because a BufferView is dependent of the WorkArea
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size.
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The WorkArea also provide a scrollbar which position is translated
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into scrolling command to the inner \c BufferView.
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The WorkArea use the BufferView to translate each keyboard or mouse
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events into terms that the Buffer can understand:
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- insert/delete char
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- select char
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- etc.
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4) The Window: \c GuiView
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This is a full window containing a menubar, toolbars and a central
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widget. A GuiView is in charge of creating and closing a View for a
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given Buffer.
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In the qt4 specialisation, \c GuiView, the central widget is a tab
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widget. Each tab is reverved to the visualisation of one Buffer and
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contains one WorkArea. In the qt4 frontend, one GuiView thus contains
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multiple WorkAreas but this number can limited to one for another
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frontend. The idea is that the kernel should not know how a Buffer
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is displayed on screen; it's the frontend business.
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It is also possible to have multiple Workareas showing
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simultaneously in the same GuiView (ex: with split window), thus
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sharing the menubar and toolbars.
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In any case, there should be only one WorkArea that gets the focus
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at a time.
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With our current implementation using a QTabWidget, each Tab own its
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own \c WorkArea. Clicking on a tab switch a WorkArea and not really
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a Buffer. LFUN_BUFFER_SWITCH will tell the frontend to search the
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WorkArea associated to this Buffer. The WorkArea is automatically
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created if not already present.
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A WorkArea is connected to the Buffer::closing signal and is thus
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automatically destroyed when its Buffer is closed.
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*/
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class Application
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{
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public:
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///
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Application() {}
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///
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virtual ~Application() {}
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/// LyX dispatcher: executes lyx actions and does necessary
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/// screen updates depending on results.
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/// This method encapsulates all the LyX command operations.
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/// This is the class of the LyX's "high level event handler".
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/// Every user command is processed here, either invocated from
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/// keyboard or from the GUI. All GUI objects, including buttons and
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/// menus should use this class and never call kernel functions directly.
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virtual void dispatch(FuncRequest const &) = 0;
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/// LyX dispatcher: executes lyx actions and returns result.
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virtual void dispatch(FuncRequest const &, DispatchResult & dr) = 0;
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///
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virtual FuncStatus getStatus(FuncRequest const & cmd) const = 0;
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/// Load files and restore GUI Session.
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virtual void restoreGuiSession() = 0;
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///
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virtual Buffer const * updateInset(Inset const * inset) const = 0;
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/// Start the main event loop.
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/// The batch command is programmed to be execute once
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/// the event loop is started.
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virtual int exec() = 0;
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/// Quit running LyX.
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/**
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* This may either quit directly or record the exit status
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* and only stop the event loop.
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*/
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virtual void exit(int status) = 0;
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/**
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* Given col, fills r, g, b in the range 0-255.
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* The function returns true if successful.
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* It returns false on failure and sets r, g, b to 0.
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*/
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virtual bool getRgbColor(ColorCode col, RGBColor & rgbcol) = 0;
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/// Like getRgbColor(), but static and slower
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static bool getRgbColorUncached(ColorCode col, RGBColor & rgbcol);
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/** Eg, passing Color_black returns "000000",
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* passing Color_white returns "ffffff".
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*/
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virtual std::string const hexName(ColorCode col) = 0;
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/**
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* add a callback for socket read notification
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* @param fd socket descriptor (file/socket/etc)
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*/
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typedef boost::function<void()> SocketCallback;
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virtual void registerSocketCallback(int fd, SocketCallback func) = 0;
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/**
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* remove a I/O read callback
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* @param fd socket descriptor (file/socket/etc)
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*/
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virtual void unregisterSocketCallback(int fd) = 0;
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virtual bool searchMenu(FuncRequest const & func,
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docstring_list & names) const = 0;
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/// \return the icon file name for the given action.
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static docstring iconName(FuncRequest const & f, bool unknown);
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/// Handle a accented char key sequence
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/// FIXME: this is only needed for LFUN_ACCENT_* in Text::dispatch()
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virtual void handleKeyFunc(FuncCode action) = 0;
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/// Start a long operation with some cancel possibility (button or ESC)
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virtual void startLongOperation() = 0;
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/// This needs to be periodically called to avoid freezing the GUI
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virtual bool longOperationCancelled() = 0;
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/// Stop the long operation mode (i.e., release the GUI)
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virtual void stopLongOperation() = 0;
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/// A started long operation is still in progress ?
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virtual bool longOperationStarted() = 0;
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};
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/// Return the list of loadable formats.
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std::vector<std::string> loadableImageFormats();
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} // namespace frontend
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frontend::Application * theApp();
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frontend::Application * createApplication(int & argc, char * argv[]);
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void hideDialogs(std::string const & name, Inset * inset);
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/// Set locale correctly using LyXRC::gui_language
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void setLocale();
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} // namespace lyx
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#endif // APPLICATION_H
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