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 /// Defines key maps and actions for key sequences
  30 class KeyMap {
  31 public:
  32         /**
  33          * Bind/Unbind a key sequence to an action.
  34          * @return 0 on success, or position in string seq where error
  35          * occurs.
  36          * See KeySequence::parse for the syntax of the seq string
  37          */
  38         size_t bind(std::string const & seq, FuncRequest const & func);
  39         size_t unbind(std::string const & seq, FuncRequest const & func);
  40
  41         /**
  42          * Define/Undefine an action for a key sequence.
  43          * @param r internal recursion level
  44          */
  45         void bind(KeySequence * seq, FuncRequest const & func,
  46                     unsigned int r = 0);
  47         void unbind(KeySequence * seq, FuncRequest const & func,
  48                     unsigned int r = 0);
  49
  50
  51         // if a keybinding has been defined.
  52         bool hasBinding(KeySequence const & seq, FuncRequest const & func,
  53                         unsigned int r = 0);
  54
  55         // clear all bindings
  56         void clear();
  57
  58         /** Parse a bind file. If a valid unbind_map is given, put \unbind
  59          * bindings to a separate KeyMap. This is used in the Shortcut preference
  60          * dialog where main and user bind files are loaded separately so \unbind
  61          * in user.bind can not nullify \bind in the master bind file.
  62          *
  63          * @param bind_file bind file
  64          * @param unbind_map pointer to a KeyMap that holds \unbind bindings
  65          */
  66         bool read(std::string const & bind_file, KeyMap * unbind_map = 0);
  67
  68         /** write to a bind file.
  69          * @param append append to the bind_file instead of overwrite it
  70          * @param unbind use \unbind instead of \bind, indicating this KeyMap
  71          *        actually record unbind maps.
  72          */
  73         void write(std::string const & bind_file, bool append, bool unbind=false) const;
  74
  75         /**
  76          * print all available keysyms
  77          * @param forgui true if the string should use translations and
  78          *   special characters.
  79          */
  80         docstring const print(bool forgui) const;
  81
  82         /**
  83          * Look up a key press in the keymap.
  84          * @param key the keysym
  85          * @param mod the modifiers
  86          * @param seq the current key sequence so far
  87          * @return the action / LFUN_COMMAND_PREFIX / LFUN_UNKNOWN_ACTION
  88          */
  89         FuncRequest const &
  90         lookup(KeySymbol const & key, KeyModifier mod, KeySequence * seq) const;
  91
  92         ///
  93         typedef std::vector<KeySequence> Bindings;
  94
  95         /// Given an action, find all keybindings.
  96         Bindings findBindings(FuncRequest const & func) const;
  97
  98         /// Given an action, print the keybindings.
  99         docstring printBindings(FuncRequest const & func) const;
 100
 101         struct Binding {
 102                 Binding(FuncRequest const & r, KeySequence const & s, int t)
 103                         : request(r), sequence(s), tag(t) {}
 104                 FuncRequest request;
 105                 KeySequence sequence;
 106                 int tag;
 107         };
 108         typedef std::vector<Binding> BindingList;
 109         /**
 110          * Return all lfun and their associated bindings.
 111          * @param unbound list unbound (func without any keybinding) as well
 112          * @param tag an optional tag to indicate the source of the bindinglist
 113          */
 114         BindingList listBindings(bool unbound, int tag = 0) const;
 115
 116         /**
 117          *  Given an action, find the first 1-key binding (if it exists).
 118          *  The KeySymbol pointer is 0 is no key is found.
 119          *  [only used by the Qt/Mac frontend]
 120          */
 121         std::pair<KeySymbol, KeyModifier>
 122         find1keybinding(FuncRequest const & func) const;
 123
 124         /**
 125          * Returns a string of the given keysym, with modifiers.
 126          * @param key the key as a keysym
 127          * @param mod the modifiers
 128          */
 129         static std::string const printKeySym(KeySymbol const & key,
 130                                              KeyModifier mod);
 131
 132 private:
 133         ///
 134         typedef std::pair<KeyModifier, KeyModifier> ModifierPair;
 135
 136         ///
 137         struct Key {
 138                 /// Keysym
 139                 KeySymbol code;
 140                 /// Modifier masks
 141                 ModifierPair mod;
 142                 /// Keymap for prefix keys
 143                 boost::shared_ptr<KeyMap> table;
 144                 /// Action for !prefix keys
 145                 FuncRequest func;
 146         };
 147
 148         /**
 149          * Given an action, find all keybindings
 150          * @param func the action
 151          * @param prefix a sequence to prepend the results
 152          */
 153         Bindings findBindings(FuncRequest const & func,
 154                               KeySequence const & prefix) const;
 155
 156         void listBindings(BindingList & list, KeySequence const & prefix,
 157                                   int tag) const;
 158
 159         /// is the table empty ?
 160         bool empty() const { return table.empty(); }
 161         ///
 162         typedef std::vector<Key> Table;
 163         ///
 164         Table table;
 165 };
 166
 167 /// Implementation is in LyX.cpp
 168 extern KeyMap & theTopLevelKeymap();
 169
 170
 171 } // namespace lyx
 172
 173 #endif // KEYMAP_H