remove BufferCellApiView

src/common/buffer/AttributeData.ts

@@ -47,6 +47,7 @@ export class AttributeData implements IAttributeData {
   public isBgPalette(): boolean   { return (this.bg & Attributes.CM_MASK) === Attributes.CM_P16 || (this.bg & Attributes.CM_MASK) === Attributes.CM_P256; }
   public isFgDefault(): boolean   { return (this.fg & Attributes.CM_MASK) === 0; }
   public isBgDefault(): boolean   { return (this.bg & Attributes.CM_MASK) === 0; }
+  public isAttributeDefault(): boolean { return this.fg === 0 && this.bg === 0; }
 
   // colors
   public getFgColor(): number {

src/common/buffer/Constants.ts

@@ -116,12 +116,7 @@ export const enum FgFlags {
   BOLD = 0x8000000,
   UNDERLINE = 0x10000000,
   BLINK = 0x20000000,
-  INVISIBLE = 0x40000000,
-
-  /**
-   * bit 27..31 (32th bit unused)
-   */
-  FM_MASK = 0x7C000000
+  INVISIBLE = 0x40000000
 }
 
 export const enum BgFlags {
@@ -129,10 +124,5 @@ export const enum BgFlags {
    * bit 27..32 (upper 4 unused)
    */
   ITALIC = 0x4000000,
-  DIM = 0x8000000,
-
-  /**
-   * bit 27..32 (upper 4 unused)
-   */
-  FM_MASK = 0xFC000000
+  DIM = 0x8000000
 }