Allow to switch buffer languages via the menu.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@33366 a592a061-630c-0410-9148-cb99ea01b6c8

lib/ui/stdcontext.inc

@@ -315,6 +315,7 @@ Menuset
 		Item "Apply Last Text Style|A" "textstyle-apply"
 		Submenu "Text Style|S" "edit_textstyles"
 		Item "Paragraph Settings...|P" "layout-paragraph"
+		LanguageSelector
 		Separator
 		Item "Fullscreen Mode" "ui-toggle fullscreen"
 	End

lib/ui/stdmenus.inc

@@ -111,6 +111,7 @@ Menuset
 		Item "Move Paragraph Down|v" "paragraph-move-down"
 		Separator
 		Submenu "Text Style|S" "edit_textstyles"
+		LanguageSelector
 		Item "Paragraph Settings...|P" "layout-paragraph"
 		Separator
 # Mathed b0rkage means these don't work properly
@@ -125,7 +126,7 @@ Menuset
 # obvious what the context is for the others)
 		OptItem "Increase List Depth|I" "depth-increment"
 		OptItem "Decrease List Depth|D" "depth-decrement"
-		OptItem "Dissolve Inset|l" "inset-dissolve"
+		OptItem "Dissolve Inset" "inset-dissolve"
 		OptItem "TeX Code Settings...|C" "inset-settings ert"
 # 'a' shortcut to match Insert entry, shouldn't clash with Table Settings
 		OptItem "Float Settings...|a" "inset-settings float"

src/Buffer.cpp

@@ -2172,6 +2172,27 @@ bool Buffer::isMultiLingual() const
 }
 
 
+std::set<Language const *> Buffer::getLanguages() const
+{
+	std::set<Language const *> languages;
+	getLanguages(languages);
+	return languages;
+}
+
+
+void Buffer::getLanguages(std::set<Language const *> & languages) const
+{
+	ParConstIterator end = par_iterator_end();
+	for (ParConstIterator it = par_iterator_begin(); it != end; ++it)
+		it->getLanguages(languages);
+	// also children
+	std::vector<Buffer *> clist = getChildren();
+	for (vector<Buffer *>::const_iterator cit = clist.begin();
+	     cit != clist.end(); ++cit)
+		(*cit)->getLanguages(languages);
+}
+
+
 DocIterator Buffer::getParFromID(int const id) const
 {
 	Buffer * buf = const_cast<Buffer *>(this);

src/Buffer.h

@@ -375,6 +375,8 @@ public:
 
 	///
 	bool isMultiLingual() const;
+	///
+	std::set<Language const *> getLanguages() const;
 
 	///
 	BufferParams & params();
@@ -572,6 +574,8 @@ private:
 	*/
 	ReadStatus readFile(Lexer &, support::FileName const & filename,
 			    bool fromString = false);
+	///
+	void getLanguages(std::set<Language const *> &) const;
 
 	/// Use the Pimpl idiom to hide the internals.
 	class Impl;

src/Paragraph.cpp

@@ -2616,6 +2616,20 @@ bool Paragraph::isMultiLingual(BufferParams const & bparams) const
 }
 
 
+void Paragraph::getLanguages(std::set<Language const *> & languages) const
+{
+	FontList::const_iterator cit = d->fontlist_.begin();
+	FontList::const_iterator end = d->fontlist_.end();
+
+	for (; cit != end; ++cit) {
+		Language const * lang = cit->font().language();
+		if (lang != ignore_language &&
+		    lang != latex_language)
+			languages.insert(lang);
+	}
+}
+
+
 docstring Paragraph::asString(int options) const
 {
 	return asString(0, size(), options);

src/Paragraph.h

@@ -23,6 +23,8 @@
 #include "support/strfwd.h"
 #include "support/types.h"
 
+#include <set>
+
 namespace lyx {
 
 class AuthorList;
@@ -117,6 +119,8 @@ public:
 			    Language const * from, Language const * to);
 	///
 	bool isMultiLingual(BufferParams const &) const;
+	///
+	void getLanguages(std::set<Language const *> &) const;
 
 	/// Convert the paragraph to a string.
 	/// \param AsStringParameter options. This can contain any combination of

src/Text3.cpp

@@ -2560,6 +2560,7 @@ bool Text::getStatus(Cursor & cur, FuncRequest const & cmd,
 
 	case LFUN_LANGUAGE:
 		enable = !cur.inset().getLayout().isPassThru();
+		flag.setOnOff(to_utf8(cmd.argument()) == cur.real_current_font.language()->lang());
 		break;
 
 	case LFUN_BREAK_PARAGRAPH:

src/frontends/qt4/Menus.cpp

@@ -38,6 +38,7 @@
 #include "FuncStatus.h"
 #include "IndicesList.h"
 #include "KeyMap.h"
+#include "Language.h"
 #include "Lexer.h"
 #include "LyXAction.h"
 #include "LyX.h" // for lastfiles
@@ -164,7 +165,9 @@ public:
 		/** Available graphics groups */
 		GraphicsGroups,
 		/// Words suggested by the spellchecker.
-		SpellingSuggestions
+		SpellingSuggestions,
+		/** Used Languages */
+		LanguageSelector
 	};
 
 	explicit MenuItem(Kind kind) : kind_(kind), optional_(false) {}
@@ -322,6 +325,7 @@ public:
 	void expandCiteStyles(BufferView const *);
 	void expandGraphicsGroups(BufferView const *);
 	void expandSpellingSuggestions(BufferView const *);
+	void expandLanguageSelector(Buffer const * buf);
 	///
 	ItemList items_;
 	///
@@ -428,7 +432,8 @@ void MenuDefinition::read(Lexer & lex)
 		md_pasterecent,
 		md_toolbars,
 		md_graphicsgroups,
-		md_spellingsuggestions
+		md_spellingsuggestions,
+		md_languageselector
 	};
 
 	LexerKeyword menutags[] = {
@@ -450,6 +455,7 @@ void MenuDefinition::read(Lexer & lex)
 		{ "indiceslists", md_indiceslists },
 		{ "indiceslistscontext", md_indiceslistscontext },
 		{ "item", md_item },
+		{ "languageselector", md_languageselector },
 		{ "lastfiles", md_lastfiles },
 		{ "optitem", md_optitem },
 		{ "optsubmenu", md_optsubmenu },
@@ -568,6 +574,10 @@ void MenuDefinition::read(Lexer & lex)
 			add(MenuItem(MenuItem::SpellingSuggestions));
 			break;
 
+		case md_languageselector:
+			add(MenuItem(MenuItem::LanguageSelector));
+			break;
+
 		case md_indices:
 			add(MenuItem(MenuItem::Indices));
 			break;
@@ -754,6 +764,36 @@ void MenuDefinition::expandSpellingSuggestions(BufferView const * bv)
 }
 
 
+void MenuDefinition::expandLanguageSelector(Buffer const * buf)
+{
+	if (!buf)
+		return;
+
+	std::set<Language const *> languages =
+		buf->masterBuffer()->getLanguages();
+
+	if (languages.size() < 2) {
+		add(MenuItem(MenuItem::Command, qt_("Language ...|L"),
+			FuncRequest(LFUN_DIALOG_SHOW, "character")));
+		return;
+	}
+
+	MenuItem item(MenuItem::Submenu, qt_("Language|L"));
+	item.setSubmenu(MenuDefinition(qt_("Language")));
+	std::set<Language const *>::const_iterator const begin = languages.begin();
+	for (std::set<Language const *>::const_iterator cit = begin;
+	     cit != languages.end(); ++cit) {
+		MenuItem w(MenuItem::Command, qt_((*cit)->display()),
+			FuncRequest(LFUN_LANGUAGE, (*cit)->lang()));
+		item.submenu().addWithStatusCheck(w);
+	}
+	item.submenu().add(MenuItem(MenuItem::Separator));
+	item.submenu().add(MenuItem(MenuItem::Command, qt_("More Languages ..."),
+			FuncRequest(LFUN_DIALOG_SHOW, "character")));
+	add(item);
+}
+
+
 void MenuDefinition::expandLastfiles()
 {
 	LastFilesSection::LastFiles const & lf = theSession().lastFiles().lastFiles();
@@ -1652,6 +1692,10 @@ void Menus::Impl::expand(MenuDefinition const & frommenu,
 			tomenu.expandSpellingSuggestions(bv);
 			break;
 
+		case MenuItem::LanguageSelector:
+			tomenu.expandLanguageSelector(buf);
+			break;
+
 		case MenuItem::Submenu: {
 			MenuItem item(*cit);
 			item.setSubmenu(MenuDefinition(cit->submenuname()));