Extra Highlight/Cell info

browser/src/neovim/NeovimInstance.ts

@@ -816,6 +816,7 @@ export class NeovimInstance extends EventEmitter implements INeovimInstance {
                             !!highlightInfo.undercurl,
                             highlightInfo.foreground,
                             highlightInfo.background,
+                            highlightInfo.special,
                         ),
                     )
                     break

browser/src/neovim/Screen.ts

@@ -14,6 +14,8 @@ export interface IHighlight {
 
     foregroundColor?: string
     backgroundColor?: string
+    specialColor?: string
+
     isItalicAvailable?: boolean
     isBoldAvailable?: boolean
 }
@@ -64,9 +66,12 @@ export interface ICell {
 
     foregroundColor?: string
     backgroundColor?: string
+    specialColor?: string
+
     italic?: boolean
     bold?: boolean
     underline?: boolean
+    undercurl?: boolean
 }
 
 export interface IPixelPosition {
@@ -93,6 +98,7 @@ const DefaultCell: ICell = {
 
 export class NeovimScreen implements IScreen {
     private _backgroundColor: string = "#000000"
+    private _specialColor: string = "#000000"
     private _currentHighlight: IHighlight = {}
     private _cursorColumn: number = 0
     private _cursorRow: number = 0
@@ -161,6 +167,10 @@ export class NeovimScreen implements IScreen {
         return this._foregroundColor
     }
 
+    public get specialColor(): string {
+        return this._specialColor
+    }
+
     public get currentForegroundColor(): string {
         return this._currentHighlight.foregroundColor || this._foregroundColor
     }
@@ -169,6 +179,10 @@ export class NeovimScreen implements IScreen {
         return this._currentHighlight.backgroundColor || this._backgroundColor
     }
 
+    public get currentSpecialColor(): string {
+        return this._currentHighlight.specialColor || this._specialColor
+    }
+
     public getCell = (x: number, y: number) => {
         const cell = this._grid.getCell(x, y)
 
@@ -190,14 +204,18 @@ export class NeovimScreen implements IScreen {
                     this._currentHighlight.foregroundColor || this._foregroundColor
                 let backgroundColor =
                     this._currentHighlight.backgroundColor || this._backgroundColor
+                const specialColor = this._currentHighlight.specialColor || this._specialColor
 
+                // `:help ui-event-highlight_set` specifies that the background and foreground colours
+                // are swapped if reversed is set. The special colour is not mentioned, which is why it
+                // is omitted here.
                 if (this._currentHighlight.reverse) {
                     const temp = foregroundColor
                     foregroundColor = backgroundColor
                     backgroundColor = temp
                 }
 
-                const { underline, bold, italic } = this._currentHighlight
+                const { underline, undercurl, bold, italic } = this._currentHighlight
 
                 const characters = action.characters
                 const row = this._cursorRow
@@ -211,22 +229,26 @@ export class NeovimScreen implements IScreen {
                     this._setCell(col + i, row, {
                         foregroundColor,
                         backgroundColor,
+                        specialColor,
                         character,
                         characterWidth,
                         italic,
                         bold,
                         underline,
+                        undercurl,
                     })
 
                     for (let c = 1; c < characterWidth; c++) {
                         this._setCell(col + i + c, row, {
                             foregroundColor,
                             backgroundColor,
+                            specialColor,
                             character: "",
                             characterWidth: 0,
                             italic,
                             bold,
                             underline,
+                            undercurl,
                         })
                     }
 
@@ -241,17 +263,20 @@ export class NeovimScreen implements IScreen {
                     this._currentHighlight.foregroundColor || this._foregroundColor
                 const backgroundColor =
                     this._currentHighlight.backgroundColor || this._backgroundColor
+                const specialColor = this._currentHighlight.specialColor || this._specialColor
 
                 const row = this._cursorRow
                 for (let i = this._cursorColumn; i < this.width; i++) {
                     this._setCell(i, row, {
                         foregroundColor,
                         backgroundColor,
+                        specialColor,
                         character: "",
                         characterWidth: 1,
                         bold: this._currentHighlight.bold,
                         italic: this._currentHighlight.italic,
                         underline: this._currentHighlight.underline,
+                        undercurl: this._currentHighlight.undercurl,
                     })
                 }
                 break
@@ -289,6 +314,7 @@ export class NeovimScreen implements IScreen {
                 const { isBoldAvailable, isItalicAvailable } = this._currentHighlight
                 this._currentHighlight.foregroundColor = action.foregroundColor
                 this._currentHighlight.backgroundColor = action.backgroundColor
+                this._currentHighlight.specialColor = action.specialColor
                 this._currentHighlight.reverse = !!action.reverse
                 this._currentHighlight.bold = isBoldAvailable ? action.bold : false
                 this._currentHighlight.italic = isItalicAvailable ? action.italic : false

browser/src/neovim/actions.ts

@@ -85,6 +85,7 @@ export interface ISetHighlightAction extends IAction {
 
     foregroundColor?: string
     backgroundColor?: string
+    specialColor?: string
 }
 
 export function scroll(scrollValue: number): IScrollAction {
@@ -117,6 +118,7 @@ export function setHighlight(
     undercurl: boolean,
     foregroundColor?: number,
     backgroundColor?: number,
+    specialColor?: number,
 ): ISetHighlightAction {
     const action: ISetHighlightAction = {
         type: SET_HIGHLIGHT,
@@ -127,6 +129,7 @@ export function setHighlight(
         undercurl,
         foregroundColor: undefined,
         backgroundColor: undefined,
+        specialColor: undefined,
     }
 
     if (foregroundColor && foregroundColor !== -1) {
@@ -137,6 +140,10 @@ export function setHighlight(
         action.backgroundColor = colorToString(backgroundColor, "#000000")
     }
 
+    if (specialColor && specialColor !== -1) {
+        action.specialColor = colorToString(specialColor, "#000000")
+    }
+
     return action
 }