From 7adc6125f7515741410b5bfe9fada2a3d3eb5af0 Mon Sep 17 00:00:00 2001
From: Georg Baum <baum@lyx.org>
Date: Sat, 14 Feb 2015 20:32:25 +0100
Subject: [PATCH] Fix missing symbols in math completer

The math icons for the symbol image in the math completer were hardcoded to the
command names. This is wrong for some icons for various reasons, e.g. the case
insensitivity of windows file systems. Therefore we have to use the replacement
list which is also used for the toolbar icons. Bug #3538 is not closed because
of this problem, but IMHO it has nothing to do with this bug, it is a more
general one.
---
 src/frontends/Application.h          | 2 ++
 src/frontends/qt4/GuiApplication.cpp | 6 ++++++
 src/frontends/qt4/GuiCompleter.cpp   | 2 ++
 src/mathed/InsetMathNest.cpp         | 6 +++++-
 4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/frontends/Application.h b/src/frontends/Application.h
index 0fe4d9101d..ca5ea4493a 100644
--- a/src/frontends/Application.h
+++ b/src/frontends/Application.h
@@ -235,6 +235,8 @@ public:
 
 	/// \return the icon file name for the given action.
 	static docstring iconName(FuncRequest const & f, bool unknown);
+	/// \return the math icon name for the given command.
+	static docstring mathIcon(docstring const & c);
 
 	/// Handle a accented char key sequence
 	/// FIXME: this is only needed for LFUN_ACCENT_* in Text::dispatch()
diff --git a/src/frontends/qt4/GuiApplication.cpp b/src/frontends/qt4/GuiApplication.cpp
index d58c9c94bb..6812a2df58 100644
--- a/src/frontends/qt4/GuiApplication.cpp
+++ b/src/frontends/qt4/GuiApplication.cpp
@@ -1079,6 +1079,12 @@ docstring Application::iconName(FuncRequest const & f, bool unknown)
 }
 
 
+docstring Application::mathIcon(docstring const & c)
+{
+	return qstring_to_ucs4(findPng(toqstr(c)));
+}
+
+
 FuncStatus GuiApplication::getStatus(FuncRequest const & cmd) const
 {
 	FuncStatus status;
diff --git a/src/frontends/qt4/GuiCompleter.cpp b/src/frontends/qt4/GuiCompleter.cpp
index 87c5aa9007..7c3c2ff2c8 100644
--- a/src/frontends/qt4/GuiCompleter.cpp
+++ b/src/frontends/qt4/GuiCompleter.cpp
@@ -137,6 +137,8 @@ public:
 		// get icon from cache
 		QPixmap scaled;
 		QString const name = ":" + toqstr(list_->icon(index.row()));
+		if (name == ":")
+			return scaled;
 		if (!QPixmapCache::find("completion" + name, scaled)) {
 			// load icon from disk
 			QPixmap p = QPixmap(name);
diff --git a/src/mathed/InsetMathNest.cpp b/src/mathed/InsetMathNest.cpp
index 179d7775f3..dbc0c7692b 100644
--- a/src/mathed/InsetMathNest.cpp
+++ b/src/mathed/InsetMathNest.cpp
@@ -54,6 +54,7 @@
 #include "OutputParams.h"
 #include "Text.h"
 
+#include "frontends/Application.h"
 #include "frontends/Clipboard.h"
 #include "frontends/Painter.h"
 #include "frontends/Selection.h"
@@ -2240,7 +2241,10 @@ std::string MathCompletionList::icon(size_t idx) const
 		cmd = locals[idx];
 
 	// get the icon resource name by stripping the backslash
-	return "images/math/" + to_utf8(cmd.substr(1)) + ".png";
+	docstring icon_name = frontend::Application::mathIcon(cmd.substr(1));
+	if (icon_name.empty())
+		return std::string();
+	return "images/math/" + to_utf8(icon_name);
 }
 
 std::vector<docstring> MathCompletionList::globals;