[LyX/master] Add LFUN_LYXFILES_OPEN

[Juergen Spitzmueller]

commit c2822d684b00b8425ba05628a1454b4e2a44f720
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Wed Feb 10 09:36:32 2021 +0100

    Add LFUN_LYXFILES_OPEN
    
    This opens the new templates/examples dialog and creates a view if
    necessary (#12106).
---
 lib/RELEASE-NOTES                   |    2 ++
 lib/ui/stdmenus.inc                 |    4 ++--
 src/FuncCode.h                      |    1 +
 src/LyXAction.cpp                   |   10 ++++++++++
 src/frontends/qt/GuiApplication.cpp |   20 ++++++++++++++++++++
 5 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/lib/RELEASE-NOTES b/lib/RELEASE-NOTES
index 6c63b66..1f8069b 100644
--- a/lib/RELEASE-NOTES
+++ b/lib/RELEASE-NOTES
@@ -90,6 +90,8 @@
 
 * ifrelatives is a helper function to check whether a buffer has a master or children.
 
+* lyxfiles-open opens the new examples or templates dialog.
+
 * master-buffer-forall executes an lfun in the master and all children of a document.
 
 * paragraph-select is a new convenience function to select the paragraph
diff --git a/lib/ui/stdmenus.inc b/lib/ui/stdmenus.inc
index 08827f9..8138f95 100644
--- a/lib/ui/stdmenus.inc
+++ b/lib/ui/stdmenus.inc
@@ -43,10 +43,10 @@ Menuset
 
 	Menu "file"
 		Item "New|N" "buffer-new"
-		Item "New from Template...|m" "dialog-show lyxfiles templates"
+		Item "New from Template...|m" "lyxfiles-open templates"
 		Item "Open...|O" "file-open"
 		Submenu "Open Recent|t" "file_lastfiles"
-		Item "Open Example...|p" "dialog-show lyxfiles examples"
+		Item "Open Example...|p" "lyxfiles-open examples"
 		Separator
 		Item "Close|C" "buffer-close"
 		Item "Close All" "buffer-close-all"
diff --git a/src/FuncCode.h b/src/FuncCode.h
index 9857143..a720c64 100644
--- a/src/FuncCode.h
+++ b/src/FuncCode.h
@@ -494,6 +494,7 @@ enum FuncCode
 	LFUN_TOOLBAR_SET,               // spitz 20201217
 	// 385
 	LFUN_INSET_SPLIT,               // jspitzm 20201222
+	LFUN_LYXFILES_OPEN,             // jspitzm 20210210
 	LFUN_LASTACTION                 // end of the table
 };
 
diff --git a/src/LyXAction.cpp b/src/LyXAction.cpp
index 92da4d7..38fa2c3 100644
--- a/src/LyXAction.cpp
+++ b/src/LyXAction.cpp
@@ -1901,6 +1901,16 @@ void LyXAction::init()
 		{ LFUN_HELP_OPEN, "help-open", NoBuffer | Argument, Buffer },
 
 /*!
+ * \var lyx::FuncCode lyx::LFUN_LYXFILES_OPEN
+ * \li Action: Open lyxfiles (templates/examples). Create a view if he have none.
+ * \li Syntax: lyxfiles-open [<TYPE>]
+ * \li Params: <TYPE>: templates or examples. Default is templates.
+ * \li Origin: spitz, 10 Feb 2021
+ * \endvar
+ */
+		{ LFUN_LYXFILES_OPEN, "lyxfiles-open", NoBuffer | Argument, Buffer },
+
+/*!
  * \var lyx::FuncCode lyx::LFUN_HREF_INSERT
  * \li Action: Inserts hyperlinks into the document (clickable in pdf output).
  * \li Notion: Hyperlink target can be set via selection + hyperlink-insert function.
diff --git a/src/frontends/qt/GuiApplication.cpp b/src/frontends/qt/GuiApplication.cpp
index 6507700..104aa00 100644
--- a/src/frontends/qt/GuiApplication.cpp
+++ b/src/frontends/qt/GuiApplication.cpp
@@ -1379,6 +1379,7 @@ bool GuiApplication::getStatus(FuncRequest const & cmd, FuncStatus & flag) const
 	case LFUN_BUFFER_NEW:
 	case LFUN_BUFFER_NEW_TEMPLATE:
 	case LFUN_FILE_OPEN:
+	case LFUN_LYXFILES_OPEN:
 	case LFUN_HELP_OPEN:
 	case LFUN_SCREEN_FONT_UPDATE:
 	case LFUN_SET_COLOR:
@@ -1821,6 +1822,25 @@ void GuiApplication::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 		break;
 	}
 
+	case LFUN_LYXFILES_OPEN: {
+		// This is the actual reason for this method (#12106).
+		validateCurrentView();
+		if (!current_view_
+		   || (!lyxrc.open_buffers_in_tabs
+		       && current_view_->documentBufferView() != nullptr))
+			createView();
+		string arg = to_utf8(cmd.argument());
+		if (arg.empty())
+			// set default
+			arg = "templates";
+		if (arg != "templates" && arg != "examples") {
+			current_view_->message(_("Wrong argument. Must be 'examples' or 'templates'."));
+			break;
+		}
+		lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "lyxfiles " + arg));
+		break;
+	}
+
 	case LFUN_SET_COLOR: {
 		string const lyx_name = cmd.getArg(0);
 		string x11_name = cmd.getArg(1);