React better if we can't find bind files. Related to bug 6076.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@30639 a592a061-630c-0410-9148-cb99ea01b6c8

src/KeyMap.cpp

@@ -23,6 +23,10 @@
 #include "support/docstream.h"
 #include "support/FileName.h"
 #include "support/filetools.h"
+#include "support/gettext.h"
+#include "support/lstrings.h"
+
+#include "frontends/alert.h"
 
 #include <fstream>
 #include <sstream>
@@ -205,7 +209,36 @@ void KeyMap::clear()
 }
 
 
-bool KeyMap::read(string const & bind_file, KeyMap * unbind_map)
+bool KeyMap::read(string const & bind_file, KeyMap * unbind_map, BindReadType rt)
+{
+	FileName bf = i18nLibFileSearch("bind", bind_file, "bind");
+	if (bf.empty()) {
+		if (rt == MissingOK)
+			return true;
+		lyxerr << "Could not find bind file: " << bind_file;
+		if (rt == Default) {
+			frontend::Alert::warning(_("Could not find bind file"),
+				bformat(_("Unable to find the bind file\n%1$s.\n"
+						"Please check your installation."), from_utf8(bind_file)));
+			return false;
+		}
+		frontend::Alert::warning(_("Could not find bind file"),
+			bformat(_("Unable to find the bind file\n%1$s.\n"
+			          "Falling back to default."), from_utf8(bind_file)));
+		// So try it with the default file.
+		if (read("cua", unbind_map))
+			return true;
+		lyxerr << "Could not find cua bind file!";
+		frontend::Alert::warning(_("Could not find cua bind file"),
+				_("Unable to find the default bind file `cua'.\n"
+				  "Please check your installation."));
+		return false;
+	}
+	return read(bf, unbind_map);
+}
+
+
+bool KeyMap::read(FileName const & bind_file, KeyMap * unbind_map)
 {
 	enum {
 		BN_BIND,
@@ -223,14 +256,13 @@ bool KeyMap::read(string const & bind_file, KeyMap * unbind_map)
 	if (lyxerr.debugging(Debug::PARSER))
 		lexrc.printTable(lyxerr);
 
-	FileName const tmp = i18nLibFileSearch("bind", bind_file, "bind");
-	lexrc.setFile(tmp);
+	lexrc.setFile(bind_file);
 	if (!lexrc.isOK()) {
-		LYXERR0("KeyMap::read: cannot open bind file:" << tmp);
+		LYXERR0("KeyMap::read: cannot open bind file:" << bind_file.absFilename());
 		return false;
 	}
 
-	LYXERR(Debug::KBMAP, "Reading bind file:" << tmp);
+	LYXERR(Debug::KBMAP, "Reading bind file:" << bind_file.absFilename());
 
 	bool error = false;
 	while (lexrc.isOK()) {
@@ -313,7 +345,7 @@ bool KeyMap::read(string const & bind_file, KeyMap * unbind_map)
 	}
 
 	if (error)
-		LYXERR0("KeyMap::read: error while reading bind file:" << tmp);
+		LYXERR0("KeyMap::read: error while reading bind file:" << bind_file.absFilename());
 	return !error;
 }
 

src/KeyMap.h

@@ -26,6 +26,10 @@
 
 namespace lyx {
 
+namespace support {
+	class FileName;	
+}
+
 /// Defines key maps and actions for key sequences
 class KeyMap {
 public:
@@ -37,6 +41,12 @@ public:
 		UserExtraUnbind	//< \unbind loaded from user.bind, without
 		                //<    corresponding entry in system bind file.
 	};
+	enum BindReadType {
+		MissingOK,      //< It's OK if this file is missing.
+		Fallback,       //< If missing, fallback to default "cua". This should only 
+		                //< be used when attempting to read the user-secified bind file.
+		Default         //< Report error and return.
+	};
 	/**
 	 * Bind/Unbind a key sequence to an action.
 	 * @return 0 on success, or position in string seq where error
@@ -72,8 +82,10 @@ public:
 	 *
 	 * @param bind_file bind file
 	 * @param unbind_map pointer to a KeyMap that holds \unbind bindings
+	 * @param rt how to respond if the file can't be found
 	 */
-	bool read(std::string const & bind_file, KeyMap * unbind_map = 0);
+	bool read(std::string const & bind_file, KeyMap * unbind_map = 0, 
+			BindReadType rt = Default);
 
 	/** write to a bind file.
 	 * @param append append to the bind_file instead of overwrite it
@@ -156,6 +168,9 @@ private:
 		FuncRequest func;
 	};
 
+	///
+	bool read(support::FileName const & bind_file, KeyMap * unbind_map = 0);
+
 	/**
 	 * Given an action, find all keybindings
 	 * @param func the action

src/frontends/qt4/GuiPrefs.cpp

@@ -2264,8 +2264,8 @@ void PrefShortcuts::apply(LyXRC & rc) const
 	// The good thing is that the menus are updated automatically.
 	theTopLevelKeymap().clear();
 	theTopLevelKeymap().read("site");
-	theTopLevelKeymap().read(rc.bind_file);
-	theTopLevelKeymap().read("user");
+	theTopLevelKeymap().read(rc.bind_file, 0, KeyMap::Fallback);
+	theTopLevelKeymap().read("user", 0, KeyMap::MissingOK);
 }
 
 
@@ -2279,7 +2279,7 @@ void PrefShortcuts::update(LyXRC const & rc)
 	system_bind_.read("site");
 	system_bind_.read(rc.bind_file);
 	// \unbind in user.bind is added to user_unbind_
-	user_bind_.read("user", &user_unbind_);
+	user_bind_.read("user", &user_unbind_, KeyMap::MissingOK);
 	updateShortcutsTW();
 }