src/KeyMap.h

   1 // -*- C++ -*-
   2 /**
   3  * \file KeyMap.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  *
  11  * Full author contact details are available in file CREDITS.
  12  */
  13
  14 #ifndef KEYMAP_H
  15 #define KEYMAP_H
  16
  17 #include "FuncRequest.h"
  18 #include "KeySequence.h"
  19
  20 #include "support/strfwd.h"
  21
  22 #include <boost/shared_ptr.hpp>
  23
  24 #include <vector>
  25
  26
  27 namespace lyx {
  28
  29 namespace support {
  30         class FileName;
  31 }
  32
  33 /// Defines key maps and actions for key sequences
  34 class KeyMap {
  35 public:
  36         enum ItemType {
  37                 System,         //< loaded from a bind file
  38                 UserBind,       //< \bind loaded from user.bind
  39                 UserUnbind,     //< \unbind loaded from user.bind, with corresponding
  40                                 //<    entry in system bind file
  41                 UserExtraUnbind //< \unbind loaded from user.bind, without
  42                                 //<    corresponding entry in system bind file.
  43         };
  44         enum BindReadType {
  45                 MissingOK,      //< It's OK if this file is missing.
  46                 Fallback,       //< If missing, fallback to default "cua". This should only
  47                                 //< be used when attempting to read the user-secified bind file.
  48                 Default         //< Report error and return.
  49         };
  50         /**
  51          * Bind/Unbind a key sequence to an action.
  52          * @return 0 on success, or position in string seq where error
  53          * occurs.
  54          * See KeySequence::parse for the syntax of the seq string
  55          */
  56         size_t bind(std::string const & seq, FuncRequest const & func);
  57         size_t unbind(std::string const & seq, FuncRequest const & func);
  58
  59         /**
  60          * Define/Undefine an action for a key sequence.
  61          * @param r internal recursion level
  62          */
  63         void bind(KeySequence * seq, FuncRequest const & func,
  64                     unsigned int r = 0);
  65         void unbind(KeySequence * seq, FuncRequest const & func,
  66                     unsigned int r = 0);
  67
  68
  69         /// returns the function bound to this key sequence, or
  70         /// FuncRequest::unknown if no binding exists for it.
  71         /// @param r an internal recursion counter
  72         // FIXME Surely there's a better way to do that?
  73         FuncRequest getBinding(KeySequence const & seq, unsigned int r = 0);
  74
  75         /// clear all bindings
  76         void clear();
  77
  78         /** Parse a bind file. If a valid unbind_map is given, put \unbind
  79          * bindings to a separate KeyMap. This is used in the Shortcut preference
  80          * dialog where main and user bind files are loaded separately so \unbind
  81          * in user.bind can not nullify \bind in the master bind file.
  82          *
  83          * @param bind_file bind file
  84          * @param unbind_map pointer to a KeyMap that holds \unbind bindings
  85          * @param rt how to respond if the file can't be found
  86          */
  87         bool read(std::string const & bind_file, KeyMap * unbind_map = 0,
  88                         BindReadType rt = Default);
  89
  90         /** write to a bind file.
  91          * @param append append to the bind_file instead of overwrite it
  92          * @param unbind use \unbind instead of \bind, indicating this KeyMap
  93          *        actually record unbind maps.
  94          */
  95         void write(std::string const & bind_file, bool append, bool unbind = false) const;
  96
  97         /**
  98          * print all available keysyms
  99          * @param forgui true if the string should use translations and
 100          *   special characters.
 101          */
 102         docstring const print(bool forgui) const;
 103
 104         /**
 105          * Look up a key press in the keymap.
 106          * @param key the keysym
 107          * @param mod the modifiers
 108          * @param seq the current key sequence so far
 109          * @return the action / LFUN_COMMAND_PREFIX / LFUN_UNKNOWN_ACTION
 110          */
 111         FuncRequest const &
 112                 lookup(KeySymbol const & key, KeyModifier mod, KeySequence * seq) const;
 113
 114         ///
 115         typedef std::vector<KeySequence> Bindings;
 116
 117         /// Given an action, find all keybindings.
 118         Bindings findBindings(FuncRequest const & func) const;
 119
 120         /// Given an action, print the keybindings.
 121         docstring printBindings(FuncRequest const & func,
 122                                 KeySequence::outputFormat format) const;
 123
 124         struct Binding {
 125                 Binding(FuncRequest const & r, KeySequence const & s, ItemType t)
 126                         : request(r), sequence(s), tag(t) {}
 127                 FuncRequest request;
 128                 KeySequence sequence;
 129                 KeyMap::ItemType tag;
 130         };
 131         typedef std::vector<Binding> BindingList;
 132         /**
 133          * Return all lfun and their associated bindings.
 134          * @param unbound list unbound (func without any keybinding) as well
 135          * @param tag an optional tag to indicate the source of the bindinglist
 136          */
 137         BindingList listBindings(bool unbound, ItemType tag = System) const;
 138
 139         /**
 140          *  Given an action, find the first 1-key binding (if it exists).
 141          *  The KeySymbol pointer is 0 is no key is found.
 142          *  [only used by the Qt/Mac frontend]
 143          */
 144         std::pair<KeySymbol, KeyModifier>
 145                 find1keybinding(FuncRequest const & func) const;
 146
 147         /**
 148          * Returns a string of the given keysym, with modifiers.
 149          * @param key the key as a keysym
 150          * @param mod the modifiers
 151          */
 152         static std::string const printKeySym(KeySymbol const & key,
 153                                              KeyModifier mod);
 154
 155 private:
 156         ///
 157         typedef std::pair<KeyModifier, KeyModifier> ModifierPair;
 158
 159         ///
 160         struct Key {
 161                 /// Keysym
 162                 KeySymbol code;
 163                 /// Modifier masks
 164                 ModifierPair mod;
 165                 /// Keymap for prefix keys
 166                 boost::shared_ptr<KeyMap> prefixes;
 167                 /// Action for !prefix keys
 168                 FuncRequest func;
 169         };
 170
 171         ///
 172         bool read(support::FileName const & bind_file, KeyMap * unbind_map = 0);
 173
 174         /**
 175          * Given an action, find all keybindings
 176          * @param func the action
 177          * @param prefix a sequence to prepend the results
 178          */
 179         Bindings findBindings(FuncRequest const & func,
 180                               KeySequence const & prefix) const;
 181
 182         void listBindings(BindingList & list, KeySequence const & prefix,
 183                           ItemType tag) const;
 184
 185         /// is the table empty ?
 186         bool empty() const { return table.empty(); }
 187         ///
 188         typedef std::vector<Key> Table;
 189         ///
 190         Table table;
 191 };
 192
 193 /// Implementation is in LyX.cpp
 194 extern KeyMap & theTopLevelKeymap();
 195
 196
 197 } // namespace lyx
 198
 199 #endif // KEYMAP_H