Implement nowrapscan

package.json

@@ -733,6 +733,11 @@
           "type": "object",
           "description": "Custom digraph shortcuts for inserting special characters, expressed as UTF16 code points",
           "default": {}
+        },
+        "vim.wrapscan": {
+          "type": "boolean",
+          "description": "Searches wrap around the end of the file",
+          "default": true
         }
       }
     }

src/configuration/configuration.ts

@@ -307,6 +307,7 @@ class Configuration implements IConfiguration {
   wrapKeys = {};
 
   report = 2;
+  wrapscan = true;
 
   cursorStylePerMode: IModeSpecificStrings<string> = {
     normal: undefined,

src/configuration/iconfiguration.ts

@@ -319,4 +319,9 @@ export interface IConfiguration {
    * User-defined digraphs
    */
   digraphs: { [shortcut: string]: Digraph };
+
+  /**
+   * Searches wrap around the end of the file.
+   */
+  wrapscan: boolean;
 }

src/state/searchState.ts

@@ -300,13 +300,22 @@ export class SearchState {
 
       // Wrap around
       // TODO(bell)
-      const range = this._matchRanges[0];
-      return {
-        start: Position.FromVSCodePosition(range.start),
-        end: Position.FromVSCodePosition(range.end),
-        match: true,
-        index: 0,
-      };
+      if (configuration.wrapscan) {
+        const range = this._matchRanges[0];
+        return {
+          start: Position.FromVSCodePosition(range.start),
+          end: Position.FromVSCodePosition(range.end),
+          match: true,
+          index: 0,
+        };
+      } else {
+        return {
+          start: startPosition,
+          end: startPosition,
+          match: true,
+          index: this._matchRanges.length - 1,
+        };
+      }
     } else {
       for (let [index, matchRange] of this._matchRanges
         .slice(0)
@@ -322,14 +331,24 @@ export class SearchState {
         }
       }
 
+      // Wrap around
       // TODO(bell)
-      const range = this._matchRanges[this._matchRanges.length - 1];
-      return {
-        start: Position.FromVSCodePosition(range.start),
-        end: Position.FromVSCodePosition(range.end),
-        match: true,
-        index: this._matchRanges.length - 1,
-      };
+      if (configuration.wrapscan) {
+        const range = this._matchRanges[this._matchRanges.length - 1];
+        return {
+          start: Position.FromVSCodePosition(range.start),
+          end: Position.FromVSCodePosition(range.end),
+          match: true,
+          index: this._matchRanges.length - 1,
+        };
+      } else {
+        return {
+          start: startPosition,
+          end: startPosition,
+          match: true,
+          index: 0,
+        };
+      }
     }
   }
 

test/motionLineWrapping.test.ts

@@ -132,4 +132,50 @@ suite('motion line wrapping', () => {
       });
     });
   });
+
+  suite('wrapscan enabled', () => {
+    setup(async () => {
+      let configuration = new Configuration();
+      configuration.wrapscan = true;
+
+      await setupWorkspace(configuration);
+    });
+
+    newTest({
+      title: 'search wraps around the end of the file',
+      start: ['|line 1', 'line 2'],
+      keysPressed: '/line\nn',
+      end: ['|line 1', 'line 2'],
+    });
+
+    newTest({
+      title: 'search wraps around the start of the file',
+      start: ['|line 1', 'line 2'],
+      keysPressed: '/line\nNN',
+      end: ['line 1', '|line 2'],
+    });
+  });
+
+  suite('wrapscan disabled', () => {
+    setup(async () => {
+      let configuration = new Configuration();
+      configuration.wrapscan = false;
+
+      await setupWorkspace(configuration);
+    });
+
+    newTest({
+      title: 'search stops at the end of the file',
+      start: ['|line 1', 'line 2'],
+      keysPressed: '/line\nn',
+      end: ['line 1', '|line 2'],
+    });
+
+    newTest({
+      title: 'search stops at the start of the file',
+      start: ['|line 1', 'line 2'],
+      keysPressed: '/line\nNN',
+      end: ['|line 1', 'line 2'],
+    });
+  });
 });

test/testConfiguration.ts

@@ -104,4 +104,5 @@ export class Configuration implements IConfiguration {
   wrapKeys = {};
   report = 2;
   digraphs: {};
+  wrapscan = true;
 }