Simplify code for bidi icons

Most of the RtL icons that we provide are simply mirrors of the LtR ones.
Therefore let the code do that by default if no +rtl icon is found.

The only RtL icon left for now is for "layout Enumerate" (notice the
numbers in it).

Also remove useless getPixmap wrapper and several old bidi_xxx icons
that were forgotten in previous patch.

lib/Makefile.am

@@ -568,9 +568,7 @@ dist_images_DATA1X = \
 	images/tab-group-close.svgz \
 	images/copy.svgz \
 	images/cut.svgz \
-	images/depth-decrement+rtl.svgz \
 	images/depth-decrement.svgz \
-	images/depth-increment+rtl.svgz \
 	images/depth-increment.svgz \
 	images/dialog-preferences.svgz \
 	images/dialog-show-new-inset_citation.svgz \
@@ -612,17 +610,13 @@ dist_images_DATA1X = \
 	images/layout-document.svgz \
 	images/layout-paragraph.svgz \
 	images/layout-toggle_Chunk.svgz \
-	images/layout-toggle_Description+rtl.svgz \
 	images/layout-toggle_Description.svgz \
 	images/layout-toggle_Enumerate+rtl.svgz  \
 	images/layout-toggle_Enumerate.svgz  \
-	images/layout-toggle_Itemize+rtl.svgz \
 	images/layout-toggle_Itemize.svgz \
-	images/layout-toggle_Labeling+rtl.svgz \
 	images/layout-toggle_Labeling.svgz \
 	images/layout-toggle_List.svgz \
 	images/layout-toggle_LyX-Code.svgz \
-	images/layout-toggle_Section+rtl.svgz \
 	images/layout-toggle_Section.svgz \
 	images/lyxfiles-system.svgz \
 	images/lyxfiles-user.svgz \
@@ -1860,9 +1854,7 @@ dist_imagesoxygen_DATA1X = \
 	images/oxygen/closetab.svgz \
 	images/oxygen/copy.svgz \
 	images/oxygen/cut.svgz \
-	images/oxygen/depth-decrement+rtl.svgz \
 	images/oxygen/depth-decrement.svgz \
-	images/oxygen/depth-increment+rtl.svgz \
 	images/oxygen/depth-increment.svgz \
 	images/oxygen/dialog-preferences.svgz \
 	images/oxygen/dialog-show-new-inset_citation.svgz \
@@ -1901,17 +1893,13 @@ dist_imagesoxygen_DATA1X = \
 	images/oxygen/layout-paragraph.svgz \
 	images/oxygen/layout.svgz \
 	images/oxygen/layout-toggle_Chunk.svgz \
-	images/oxygen/layout-toggle_Description+rtl.svgz \
 	images/oxygen/layout-toggle_Description.svgz \
 	images/oxygen/layout-toggle_Enumerate+rtl.svgz  \
 	images/oxygen/layout-toggle_Enumerate.svgz  \
-	images/oxygen/layout-toggle_Itemize+rtl.svgz \
 	images/oxygen/layout-toggle_Itemize.svgz \
-	images/oxygen/layout-toggle_Labeling+rtl.svgz \
 	images/oxygen/layout-toggle_Labeling.svgz \
 	images/oxygen/layout-toggle_List.svgz \
 	images/oxygen/layout-toggle_LyX-Code.svgz \
-	images/oxygen/layout-toggle_Section+rtl.svgz \
 	images/oxygen/layout-toggle_Section.svgz \
 	images/oxygen/lyx-quit.svgz \
 	images/oxygen/marginalnote-insert.svgz \
@@ -2071,9 +2059,7 @@ dist_imagesclassic_DATA = \
 	images/classic/tab-group-close.png  \
 	images/classic/copy.png  \
 	images/classic/cut.png  \
-	images/classic/depth-decrement+rtl.png  \
 	images/classic/depth-decrement.png  \
-	images/classic/depth-increment+rtl.png  \
 	images/classic/depth-increment.png  \
 	images/classic/dialog-preferences.png  \
 	images/classic/dialog-show_mathdelimiter.png  \
@@ -2109,17 +2095,13 @@ dist_imagesclassic_DATA = \
 	images/classic/layout-paragraph.png  \
 	images/classic/layout.png  \
 	images/classic/layout-toggle_Chunk.png  \
-	images/classic/layout-toggle_Description+rtl.png \
 	images/classic/layout-toggle_Description.png \
 	images/classic/layout-toggle_Enumerate+rtl.png  \
 	images/classic/layout-toggle_Enumerate.png  \
-	images/classic/layout-toggle_Itemize+rtl.png \
 	images/classic/layout-toggle_Itemize.png \
-	images/classic/layout-toggle_Labeling+rtl.png \
 	images/classic/layout-toggle_Labeling.png \
 	images/classic/layout-toggle_List.png \
 	images/classic/layout-toggle_LyX-Code.png \
-	images/classic/layout-toggle_Section+rtl.png \
 	images/classic/layout-toggle_Section.png \
 	images/classic/marginalnote-insert.png  \
 	images/classic/master-buffer-update.png  \

lib/RELEASE-NOTES

@@ -17,12 +17,13 @@
 
 !!Documents compilation process and images conversion
 
-* LyX now uses utf8 encoding per default for all languages. This does not affect
-  existing documents. Note that LyX also does not touch personal defaults and templates.
-  That is to say, if you still see traditional encoding preset for new documents,
-  you can change that by selecting "Unicode (utf8) [default]" and hitting "Save
-  as Documents Defaults" afterwards. Your personal templates need to be changed manually
-  if desired.
+* LyX now uses utf8 encoding per default for all languages. This does
+  not affect existing documents. Note that LyX also does not touch
+  personal defaults and templates. That is to say, if you still see
+  traditional encoding preset for new documents, you can change that
+  by selecting "Unicode (utf8) [default]" and hitting "Save as
+  Documents Defaults" afterwards. Your personal templates need to be
+  changed manually if desired.
 
 * LyX defaults to the "HE8" LaTeX font encoding with Hebrew if the
   "Culmus" LaTeX fonts are installed.
@@ -97,6 +98,10 @@
 
 * date-insert: obsoleted by info-insert date.
 
+!!!The following LyX function has been added and then removed in 2.4 development cycle.
+
+* bidi: used as a first solution to provide icons that change
+  direction with language.
 
 
 !!!The following LyX documents have been moved in 2.4:

lib/ui/stdtoolbars.inc

@@ -38,7 +38,8 @@
 #
 #   BidiItem is like Item, but an alternative icon (with name ending
 #   with "+rtl") will be used <hen the paragraph has a right-to-left
-#   layout.
+#   layout. If this alternative icon does not exist, the LtR icon will
+#   be mirrored instead.
 #
 #   Layouts adds the layouts combo-box to the toolbar
 #
@@ -122,6 +123,7 @@ ToolbarSet
 		BidiItem "Itemized list" "layout-toggle Itemize"
 		BidiItem "Labeled List" "layout-toggle Labeling"
 		BidiItem "Description" "layout-toggle Description"
+		BidiItem "Section" "layout-toggle Section"
 		BidiItem "Increase depth" "depth-increment"
 		BidiItem "Decrease depth" "depth-decrement"
 		Separator

src/frontends/qt/GuiApplication.cpp

@@ -529,6 +529,7 @@ QString iconName(FuncRequest const & f, bool unknown, QString const & suffix)
 
 	// maybe a suffix?
 	name1 += suffix;
+	name2 += suffix;
 
 	QStringList imagedirs;
 	imagedirs << "images/" << "images/ipa/";
@@ -580,12 +581,6 @@ QString iconName(FuncRequest const & f, bool unknown, QString const & suffix)
 }
 
 
-bool getPixmap(QPixmap & pixmap, QString const & path)
-{
-	return pixmap.load(path);
-}
-
-
 QPixmap getPixmap(QString const & path, QString const & name, QString const & ext)
 {
 	QString imagedir = path;
@@ -593,14 +588,14 @@ QPixmap getPixmap(QString const & path, QString const & name, QString const & ex
 	QString fpath = toqstr(fname.absFileName());
 	QPixmap pixmap = QPixmap();
 
-	if (getPixmap(pixmap, fpath)) {
+	if (pixmap.load(fpath)) {
 		return pixmap;
 	}
 
 	QStringList exts = ext.split(",");
 	fpath = ":/" + path + name + ".";
 	for (int i = 0; i < exts.size(); ++i) {
-		if (getPixmap(pixmap, fpath + exts.at(i))) {
+		if (pixmap.load(fpath + exts.at(i))) {
 			return pixmap;
 		}
 	}
@@ -614,7 +609,7 @@ QPixmap getPixmap(QString const & path, QString const & name, QString const & ex
 }
 
 
-QIcon getIcon(FuncRequest const & f, bool unknown, QString const & suffix)
+QIcon getIcon(FuncRequest const & f, bool unknown, bool rtl)
 {
 #if (QT_VERSION >= 0x040600)
 	if (lyxrc.use_system_theme_icons) {
@@ -631,17 +626,28 @@ QIcon getIcon(FuncRequest const & f, bool unknown, QString const & suffix)
 	}
 #endif
 
-	QString icon = iconName(f, unknown, suffix);
+	bool flip = false;
+	QString icon;
+	if (rtl) {
+		icon = iconName(f, unknown, "+rtl");
+		// No RTL icon, we'll make it ourselves
+		flip = icon.isEmpty();
+	}
+	if (icon.isEmpty())
+		icon = iconName(f, unknown);
 	if (icon.isEmpty())
 		return QIcon();
 
 	//LYXERR(Debug::GUI, "Found icon: " << icon);
 	QPixmap pixmap = QPixmap();
-	if (!getPixmap(pixmap,icon)) {
+	if (!pixmap.load(icon)) {
 		LYXERR0("Cannot load icon " << icon << " please verify resource system!");
 		return QIcon();
 	}
 
+	if (flip)
+		return QIcon(pixmap.transformed(QTransform().scale(-1, 1)));
+	else
 		return QIcon(pixmap);
 }
 

src/frontends/qt/GuiApplication.h

@@ -264,14 +264,9 @@ QString iconName(FuncRequest const & f, bool unknown,
 /// \return the pixmap for the given path, name and extension.
 /// in case of errors a warning is produced and an empty pixmap is returned.
 QPixmap getPixmap(QString const & path, QString const & name, QString const & ext);
-/// Load the file at \param path and convert it to a pixmap.
-/// \return true on success otherwise invalidate the pixmap and return false.
-/// The caller is responsible for error reporting.
-bool getPixmap(QPixmap & pixmap, QString const & path);
 
 /// \return an icon for the given action.
-QIcon getIcon(FuncRequest const & f, bool unknown,
-			  QString const & suffix = QString());
+QIcon getIcon(FuncRequest const & f, bool unknown, bool rtl = false);
 
 ///
 GuiApplication * theGuiApp();

src/frontends/qt/GuiToolbar.cpp

@@ -131,7 +131,7 @@ Action * GuiToolbar::addItem(ToolbarItem const & item)
 	Action * act = new Action(item.func_, getIcon(*item.func_, false), text,
 							  text, this);
 	if (item.type_ == ToolbarItem::BIDICOMMAND)
-		act->setRtlIcon(getIcon(*item.func_, false, "+rtl"));
+		act->setRtlIcon(getIcon(*item.func_, false, true));
 
 	actions_.append(act);
 	return act;