Fix an issue where it crashes when converting with IME. (#526)

Author: akiyosi

editor/imetooltip.go

@@ -173,22 +173,21 @@ func (i *IMETooltip) parsePreeditString(preeditStr string) {
 	currConvHl := i.s.getHighlightByHlname("GuiImeCurrentConversionText")
 
 	if preeditHl == nil {
+		preeditHl = &Highlight{}
 		if i.s.ws.foreground == nil || i.s.ws.background == nil {
 			return
 		}
 
-		preeditHl = &Highlight{}
 		preeditHl.foreground = i.s.ws.foreground
 		preeditHl.background = i.s.ws.background
 	}
 
 	if currConvHl == nil {
+		currConvHl = &Highlight{}
 		if i.s.ws.foreground == nil || i.s.ws.background == nil {
 			return
 		}
 
-		currConvHl = &Highlight{}
-
 		if i.s.ws.screenbg == "light" {
 			currConvHl.foreground = warpColor(i.s.ws.background, -30)
 			currConvHl.background = warpColor(i.s.ws.foreground, -30)

editor/tooltip.go

@@ -64,7 +64,9 @@ func (t *Tooltip) drawContent(p *gui.QPainter, getFont func() *Font) {
 		fg := chunk.hl.fg()
 		bg := chunk.hl.bg()
 		sp := chunk.hl.special
-
+		if sp == nil {
+			sp = fg
+		}
 
 		bold := chunk.hl.bold
 		italic := chunk.hl.italic