feature #4: add configuration for cursor styles

package.json

@@ -60,6 +60,30 @@
                     "type": "string",
                     "default": "#F8F3AB",
                     "description": "Background color that flashes to show the range when yanking."
+                },
+                "simpleVim.insertModeCursorStyle": {
+                    "type": "string",
+                    "enum": ["line", "block", "underline", "lineThin", "blockOutline", "underlineThin"],
+                    "default": "line",
+                    "description": "Cursor style for editor when in INSERT mode."
+                },
+                "simpleVim.normalModeCursorStyle": {
+                    "type": "string",
+                    "enum": ["line", "block", "underline", "lineThin", "blockOutline", "underlineThin"],
+                    "default": "underline",
+                    "description": "Cursor style for editor when in NORMAL mode."
+                },
+                "simpleVim.visualModeCursorStyle": {
+                    "type": "string",
+                    "enum": ["line", "block", "underline", "lineThin", "blockOutline", "underlineThin"],
+                    "default": "lineThin",
+                    "description": "Cursor style for editor when in VISUAL mode."
+                },
+                "simpleVim.visualLineModeCursorStyle": {
+                    "type": "string",
+                    "enum": ["line", "block", "underline", "lineThin", "blockOutline", "underlineThin"],
+                    "default": "lineThin",
+                    "description": "Cursor style for editor when in VISUAL LINE mode."
                 }
             }
         }

src/modes.ts

@@ -1,6 +1,6 @@
 import * as vscode from 'vscode';
 
-import { Mode } from './modes_types';
+import { Mode, CursorConfigurationStyle } from './modes_types';
 import { VimState } from './vim_state_types';
 
 export function enterInsertMode(vimState: VimState): void {
@@ -36,7 +36,41 @@ function setModeContext(key: string) {
     });
 }
 
+const configToStyleMapping: { [key in CursorConfigurationStyle]: vscode.TextEditorCursorStyle } = {
+    line: vscode.TextEditorCursorStyle.Line,
+    block: vscode.TextEditorCursorStyle.Block,
+    underline: vscode.TextEditorCursorStyle.Underline,
+    lineThin: vscode.TextEditorCursorStyle.LineThin,
+    blockOutline: vscode.TextEditorCursorStyle.BlockOutline,
+    underlineThin: vscode.TextEditorCursorStyle.UnderlineThin,
+};
+
+function isValidCursorConfigStyle(input: any): input is CursorConfigurationStyle {
+    return typeof input === 'string' && Object.keys(configToStyleMapping).indexOf(input) !== -1;
+}
+
+function getCursorConfigStyle(mode: Mode) {
+    const simpleVimConfig = vscode.workspace.getConfiguration('simpleVim');
+
+    switch (mode) {
+        case Mode.Insert:
+            return simpleVimConfig.get('insertModeCursorStyle');
+        case Mode.Normal:
+            return simpleVimConfig.get('normalModeCursorStyle');
+        case Mode.Visual:
+            return simpleVimConfig.get('visualModeCursorStyle');
+        case Mode.VisualLine:
+            return simpleVimConfig.get('visualLineModeCursorStyle');
+    }
+}
+
 export function setModeCursorStyle(mode: Mode, editor: vscode.TextEditor): void {
+    const cursorConfigStyle = getCursorConfigStyle(mode);
+    if (isValidCursorConfigStyle(cursorConfigStyle)) {
+        editor.options.cursorStyle = configToStyleMapping[cursorConfigStyle];
+        return;
+    }
+
     if (mode === Mode.Insert) {
         editor.options.cursorStyle = vscode.TextEditorCursorStyle.Line;
     } else if (mode === Mode.Normal) {

src/modes_types.ts

@@ -1,3 +1,5 @@
+export type CursorConfigurationStyle = 'line' | 'block' | 'underline' | 'lineThin' | 'blockOutline' | 'underlineThin';
+
 export enum Mode {
     Insert,
     Normal,