1 /*
2 Hotkeys.cpp: hotkeys (keyboard shortcuts)
3 Copyright 2013 by Vincent Fourmond
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include "Hotkeys.h"
20
21 #include "../util/OptionsDB.h"
22 #include "../util/Logger.h"
23
24
25 /// A helper class that stores both a connection and the
26 /// conditions in which it should be on.
27 struct HotkeyManager::ConditionalConnection {
28 /// Block or unblocks the connection based on condition.
UpdateConnectionHotkeyManager::ConditionalConnection29 void UpdateConnection() {
30 if (connection.connected()) {
31 if (!condition || condition())
32 blocker.unblock();
33 else
34 blocker.block();
35 }
36 };
37
ConditionalConnectionHotkeyManager::ConditionalConnection38 ConditionalConnection(const boost::signals2::connection& conn, std::function<bool()> cond) :
39 condition(cond),
40 connection(conn),
41 blocker(connection)
42 {
43 blocker.unblock();
44 }
45
46 /// The condition. If null, always on.
47 std::function<bool()> condition;
48
49 boost::signals2::connection connection;
50 boost::signals2::shared_connection_block blocker;
51 };
52
53 /////////////////////////////////////////////////////////
54 // Hotkey
55 /////////////////////////////////////////////////////////
56 std::map<std::string, Hotkey>* Hotkey::s_hotkeys = nullptr;
57
AddHotkey(const std::string & name,const std::string & description,GG::Key key,GG::Flags<GG::ModKey> mod)58 void Hotkey::AddHotkey(const std::string& name, const std::string& description, GG::Key key, GG::Flags<GG::ModKey> mod) {
59 if (!s_hotkeys)
60 s_hotkeys = new std::map<std::string, Hotkey>;
61 s_hotkeys->insert({name, Hotkey(name, description, key, mod)});
62 }
63
HotkeyToString(GG::Key key,GG::Flags<GG::ModKey> mod)64 std::string Hotkey::HotkeyToString(GG::Key key, GG::Flags<GG::ModKey> mod) {
65 std::ostringstream s;
66 if (mod != GG::MOD_KEY_NONE) {
67 s << mod;
68 s << "+";
69 }
70 if (key > GG::GGK_NONE) {
71 s << key;
72 }
73 return s.str();
74 }
75
DefinedHotkeys()76 std::set<std::string> Hotkey::DefinedHotkeys() {
77 std::set<std::string> retval;
78 if (s_hotkeys) {
79 for (const auto& entry : *s_hotkeys)
80 { retval.insert(entry.first); }
81 }
82 return retval;
83 }
84
ToString() const85 std::string Hotkey::ToString() const
86 { return HotkeyToString(m_key, m_mod_keys); }
87
HotkeyFromString(const std::string & str)88 std::pair<GG::Key, GG::Flags<GG::ModKey>> Hotkey::HotkeyFromString(const std::string& str) {
89 if (str.empty())
90 return {GG::GGK_NONE, GG::Flags<GG::ModKey>()};
91
92 // Strip whitespace
93 std::string copy = str;
94 copy = std::string(copy.begin(), std::remove_if(copy.begin(), copy.end(), isspace));
95
96 size_t plus = copy.find('+');
97 bool has_modifier = plus != std::string::npos;
98
99 GG::Flags<GG::ModKey> mod = GG::MOD_KEY_NONE;
100 if (has_modifier) {
101 // We have a modifier. Things get a little complex, since we need
102 // to handle the |-separated flags:
103 std::string m = copy.substr(0, plus);
104
105 size_t found = 0;
106 size_t prev = 0;
107
108 try {
109 while (true) {
110 found = m.find('|', prev);
111 std::string sub = m.substr(prev, found-prev);
112 GG::ModKey cm = GG::FlagSpec<GG::ModKey>::instance().FromString(sub);
113 mod |= cm;
114 if (found == std::string::npos)
115 break;
116 prev = found + 1;
117 }
118 } catch (...) {
119 ErrorLogger() << "Unable make flag from string: " << str;
120 return {GG::GGK_NONE, GG::Flags<GG::ModKey>()};
121 }
122 }
123
124 std::string v = has_modifier ? copy.substr(plus+1) : copy;
125 std::istringstream s(v);
126 GG::Key key;
127 s >> key;
128 return std::pair<GG::Key, GG::Flags<GG::ModKey>>(key, mod);
129 }
130
SetFromString(const std::string & str)131 void Hotkey::SetFromString(const std::string& str) {
132 std::pair<GG::Key, GG::Flags<GG::ModKey>> km = HotkeyFromString(str);
133 m_key = km.first;
134 m_mod_keys = km.second;
135 }
136
AddOptions(OptionsDB & db)137 void Hotkey::AddOptions(OptionsDB& db) {
138 if (!s_hotkeys)
139 return;
140 for (const auto& entry : *s_hotkeys) {
141 const Hotkey& hotkey = entry.second;
142 std::string n = hotkey.m_name + ".hotkey";
143 db.Add(n, hotkey.GetDescription(), hotkey.ToString());
144 }
145 }
146
ReplaceInString(std::string & str,const std::string & what,const std::string & replacement)147 static void ReplaceInString(std::string& str, const std::string& what,
148 const std::string& replacement)
149 {
150 size_t lst = 0;
151 size_t l1 = what.size();
152 size_t l2 = replacement.size();
153 if (l1 == 0 && l2 == 0)
154 return; // Nothing to do
155 do {
156 size_t t = str.find(what, lst);
157 if(t == std::string::npos)
158 return;
159 str.replace(t, l1, replacement);
160 t += l2;
161 } while(true);
162 }
163
PrettyPrint(GG::Key key,GG::Flags<GG::ModKey> mod)164 std::string Hotkey::PrettyPrint(GG::Key key, GG::Flags<GG::ModKey> mod) {
165 std::string retval;
166 if (mod & GG::MOD_KEY_CTRL)
167 retval += "CTRL+";
168 if (mod & GG::MOD_KEY_ALT)
169 retval += "ALT+";
170 if (mod & GG::MOD_KEY_SHIFT)
171 retval += "SHIFT+";
172 if (mod & GG::MOD_KEY_META)
173 retval += "META+";
174
175 std::ostringstream key_stream;
176 key_stream << key;
177 std::string key_string = key_stream.str();
178 ReplaceInString(key_string, "GGK_", "");
179
180 retval += key_string;
181 return retval;
182 }
183
PrettyPrint() const184 std::string Hotkey::PrettyPrint() const
185 { return PrettyPrint(m_key, m_mod_keys); }
186
ReadFromOptions(OptionsDB & db)187 void Hotkey::ReadFromOptions(OptionsDB& db) {
188 for (auto& entry : *s_hotkeys) {
189 Hotkey& hotkey = entry.second;
190
191 std::string options_db_name = hotkey.m_name + ".hotkey";
192 if (!db.OptionExists(options_db_name)) {
193 ErrorLogger() << "Hotkey::ReadFromOptions : no option for " << options_db_name;
194 continue;
195 }
196 std::string option_string = db.Get<std::string>(options_db_name);
197
198 std::pair<GG::Key, GG::Flags<GG::ModKey>> key_modkey_pair = {GG::GGK_NONE, GG::MOD_KEY_NONE};
199 try {
200 key_modkey_pair = HotkeyFromString(option_string);
201 } catch (...) {
202 ErrorLogger() << "Failed to read hotkey from string: " << option_string;
203 continue;
204 }
205
206 if (key_modkey_pair.first == GG::GGK_NONE)
207 continue;
208
209 if (!IsTypingSafe(key_modkey_pair.first, key_modkey_pair.second)) {
210 DebugLogger() << "Hotkey::ReadFromOptions : Typing-unsafe key spec: '"
211 << option_string << "' for hotkey " << hotkey.m_name;
212 }
213
214 hotkey.m_key = key_modkey_pair.first;
215 hotkey.m_mod_keys = key_modkey_pair.second;
216
217 TraceLogger() << "Added hotkey '" << hotkey.m_key << "' with modifiers '"
218 << hotkey.m_mod_keys << "' for hotkey '" << hotkey.m_name << "'";
219 }
220 }
221
Hotkey(const std::string & name,const std::string & description,GG::Key key,GG::Flags<GG::ModKey> mod)222 Hotkey::Hotkey(const std::string& name, const std::string& description,
223 GG::Key key, GG::Flags<GG::ModKey> mod) :
224 m_name(name),
225 m_description(description),
226 m_key(key),
227 m_key_default(key),
228 m_mod_keys(mod),
229 m_mod_keys_default(mod)
230 {}
231
NamedHotkey(const std::string & name)232 const Hotkey& Hotkey::NamedHotkey(const std::string& name)
233 { return PrivateNamedHotkey(name); }
234
GetDescription() const235 std::string Hotkey::GetDescription() const
236 { return m_description; }
237
PrivateNamedHotkey(const std::string & name)238 Hotkey& Hotkey::PrivateNamedHotkey(const std::string& name) {
239 std::string error_msg = "Hotkey::PrivateNamedHotkey error: no hotkey named: " + name;
240
241 if (!s_hotkeys)
242 throw std::runtime_error("Hotkey::PrivateNamedHotkey error: couldn't get hotkeys container.");
243
244 auto i = s_hotkeys->find(name);
245 if (i == s_hotkeys->end())
246 throw std::invalid_argument(error_msg.c_str());
247
248 return i->second;
249 }
250
IsTypingSafe(GG::Key key,GG::Flags<GG::ModKey> mod)251 bool Hotkey::IsTypingSafe(GG::Key key, GG::Flags<GG::ModKey> mod) {
252 if (GG::GGK_INSERT <= key && GG::GGK_PAGEUP >= key)
253 return false;
254 if (GG::GGK_END <= key && GG::GGK_UP >= key)
255 return false;
256 if (mod & (GG::MOD_KEY_CTRL | GG::MOD_KEY_ALT | GG::MOD_KEY_META))
257 return true;
258 if (key >= GG::GGK_F1 && key <= GG::GGK_F12)
259 return true;
260 if (key >= GG::GGK_F13 && key <= GG::GGK_F24)
261 return true;
262 if (key == GG::GGK_TAB || key == GG::GGK_ESCAPE || key == GG::GGK_NONE)
263 return true;
264 return false;
265 }
266
IsTypingSafe() const267 bool Hotkey::IsTypingSafe() const
268 { return IsTypingSafe(m_key, m_mod_keys); }
269
IsDefault() const270 bool Hotkey::IsDefault() const
271 { return m_key == m_key_default && m_mod_keys == m_mod_keys_default; }
272
SetHotkey(const Hotkey & hotkey,GG::Key key,GG::Flags<GG::ModKey> mod)273 void Hotkey::SetHotkey(const Hotkey& hotkey, GG::Key key, GG::Flags<GG::ModKey> mod) {
274 Hotkey& hk = PrivateNamedHotkey(hotkey.m_name);
275 hk.m_key = key;
276 hk.m_mod_keys = GG::MassagedAccelModKeys(mod);
277
278 GetOptionsDB().Set<std::string>(hk.m_name + ".hotkey", hk.ToString());
279 }
280
ResetHotkey(const Hotkey & old_hotkey)281 void Hotkey::ResetHotkey(const Hotkey& old_hotkey) {
282 Hotkey& hk = PrivateNamedHotkey(old_hotkey.m_name);
283 hk.m_key = hk.m_key_default;
284 hk.m_mod_keys = hk.m_mod_keys_default;
285 GetOptionsDB().Set<std::string>(hk.m_name + ".hotkey", hk.ToString());
286 }
287
ClearHotkey(const Hotkey & old_hotkey)288 void Hotkey::ClearHotkey(const Hotkey& old_hotkey)
289 { Hotkey::SetHotkey(old_hotkey, GG::GGK_NONE, GG::Flags<GG::ModKey>()); }
290
291 //////////////////////////////////////////////////////////////////////
292 // InvisibleWindowCondition
293 //////////////////////////////////////////////////////////////////////
InvisibleWindowCondition(std::initializer_list<const GG::Wnd * > bl)294 InvisibleWindowCondition::InvisibleWindowCondition(std::initializer_list<const GG::Wnd*> bl) :
295 m_blacklist(bl)
296 {}
297
operator ()() const298 bool InvisibleWindowCondition::operator()() const {
299 for (const auto& wnd : m_blacklist) {
300 if (wnd->Visible())
301 return false;
302 }
303 return true;
304 }
305
306
307 //////////////////////////////////////////////////////////////////////
308 // OrCondition
309 //////////////////////////////////////////////////////////////////////
OrCondition(std::initializer_list<std::function<bool ()>> conditions)310 OrCondition::OrCondition(std::initializer_list<std::function<bool()>> conditions) :
311 m_conditions(conditions)
312 {}
313
operator ()() const314 bool OrCondition::operator()() const {
315 for (auto cond : m_conditions) {
316 if (cond())
317 return true;
318 }
319 return false;
320 }
321
322
323 //////////////////////////////////////////////////////////////////////
324 // AndCondition
325 //////////////////////////////////////////////////////////////////////
AndCondition(std::initializer_list<std::function<bool ()>> conditions)326 AndCondition::AndCondition(std::initializer_list<std::function<bool()>> conditions) :
327 m_conditions(conditions)
328 {}
329
operator ()() const330 bool AndCondition::operator()() const {
331 for (auto cond : m_conditions) {
332 if (!cond())
333 return false;
334 }
335 return true;
336 }
337
338
339 //////////////////////////////////////////////////////////////////////
340 // HotkeyManager
341 //////////////////////////////////////////////////////////////////////
342 HotkeyManager* HotkeyManager::s_singleton = nullptr;
343
HotkeyManager()344 HotkeyManager::HotkeyManager()
345 {}
346
~HotkeyManager()347 HotkeyManager::~HotkeyManager()
348 {}
349
GetManager()350 HotkeyManager* HotkeyManager::GetManager() {
351 if (!s_singleton)
352 s_singleton = new HotkeyManager;
353 return s_singleton;
354 }
355
RebuildShortcuts()356 void HotkeyManager::RebuildShortcuts() {
357 for (const auto& con : m_internal_connections)
358 { con.disconnect(); }
359 m_internal_connections.clear();
360
361 /// @todo Disable the shortcuts that we've enabled so far ? Is it
362 /// really necessary ? An unconnected signal should simply be
363 /// ignored.
364
365 // Now, build up again all the shortcuts
366 GG::GUI* gui = GG::GUI::GetGUI();
367 for (auto& entry : m_connections) {
368 const Hotkey& hk = Hotkey::NamedHotkey(entry.first);
369
370 gui->SetAccelerator(hk.m_key, hk.m_mod_keys);
371
372 m_internal_connections.insert(gui->AcceleratorSignal(hk.m_key, hk.m_mod_keys).connect(
373 boost::bind(&HotkeyManager::ProcessNamedShortcut, this, hk.m_name, hk.m_key, hk.m_mod_keys)));
374 }
375 }
376
AddConditionalConnection(const std::string & name,const boost::signals2::connection & conn,std::function<bool ()> cond)377 void HotkeyManager::AddConditionalConnection(const std::string& name,
378 const boost::signals2::connection& conn,
379 std::function<bool()> cond)
380 {
381 ConditionalConnectionList& list = m_connections[name];
382 list.push_back(ConditionalConnection(conn, cond));
383 }
384
NamedSignal(const std::string & name)385 GG::GUI::AcceleratorSignalType& HotkeyManager::NamedSignal(const std::string& name) {
386 /// Unsure why GG::AcceleratorSignal implementation uses shared
387 /// pointers. Maybe I should, too ?
388 auto& sig = m_signals[name];
389 if (!sig)
390 sig = new GG::GUI::AcceleratorSignalType;
391 return *sig;
392 }
393
ProcessNamedShortcut(const std::string & name,GG::Key key,GG::Flags<GG::ModKey> mod)394 bool HotkeyManager::ProcessNamedShortcut(const std::string& name, GG::Key key,
395 GG::Flags<GG::ModKey> mod)
396 {
397 // reject unsafe-for-typing key combinations while typing
398 if (GG::GUI::GetGUI()->FocusWndAcceptsTypingInput() && !Hotkey::IsTypingSafe(key, mod))
399 return false;
400
401 // First update the connection state according to the current status.
402 ConditionalConnectionList& conds = m_connections[name];
403 for (auto i = conds.begin(); i != conds.end(); ++i) {
404 i->UpdateConnection();
405 if (!i->connection.connected())
406 i = conds.erase(i);
407 }
408
409 // Then, return the value of the signal !
410 GG::GUI::AcceleratorSignalType* sig = m_signals[name];
411 return (*sig)();
412 }
413