Added support for searching by regular expression

demo/index.html

@@ -16,6 +16,7 @@ <h3>Actions</h3>
       <p>
         <label>Find next <input id="find-next"/></label>
         <label>Find previous <input id="find-previous"/></label>
+        <label>Use regex<input type="checkbox" id="regex"/></label> 
       </p>
     </div>
     <div>

demo/main.js

@@ -83,13 +83,23 @@ function createTerminal() {
   addDomListener(actionElements.findNext, 'keypress', function (e) {
     if (e.key === "Enter") {
       e.preventDefault();
-      term.findNext(actionElements.findNext.value);
+      let searchOptions = {
+        regex: document.getElementById('regex').checked,
+        wholeWord: false,
+        caseSensitive: false
+      };
+      term.findNext(actionElements.findNext.value, searchOptions);
     }
   });
   addDomListener(actionElements.findPrevious, 'keypress', function (e) {
     if (e.key === "Enter") {
       e.preventDefault();
-      term.findPrevious(actionElements.findPrevious.value);
+      let searchOptions = {
+        regex: document.getElementById('regex').checked,
+        wholeWord: false,
+        caseSensitive: false
+      };
+      term.findPrevious(actionElements.findPrevious.value, searchOptions);
     }
   });
 

src/addons/search/Interfaces.ts

@@ -17,6 +17,18 @@ export interface ISearchAddonTerminal extends Terminal {
 }
 
 export interface ISearchHelper {
-  findNext(term: string): boolean;
-  findPrevious(term: string): boolean;
+  findNext(term: string, searchOptions: ISearchOptions): boolean;
+  findPrevious(term: string, searchOptions: ISearchOptions): boolean;
+}
+
+export interface ISearchOptions {
+  regex?: boolean;
+  wholeWord?: boolean;
+  caseSensitive?: boolean;
+}
+
+export interface ISearchResult {
+  term: string;
+  col: number;
+  row: number;
 }

src/addons/search/SearchHelper.ts

@@ -3,13 +3,7 @@
  * @license MIT
  */
 
-import { ISearchHelper, ISearchAddonTerminal } from './Interfaces';
-
-interface ISearchResult {
-  term: string;
-  col: number;
-  row: number;
-}
+import { ISearchHelper, ISearchAddonTerminal, ISearchOptions, ISearchResult } from './Interfaces';
 
 /**
  * A class that knows how to search the terminal and how to display the results.
@@ -19,16 +13,16 @@ export class SearchHelper implements ISearchHelper {
     // TODO: Search for multiple instances on 1 line
     // TODO: Don't use the actual selection, instead use a "find selection" so multiple instances can be highlighted
     // TODO: Highlight other instances in the viewport
-    // TODO: Support regex, case sensitivity, etc.
   }
 
   /**
    * Find the next instance of the term, then scroll to and select it. If it
    * doesn't exist, do nothing.
    * @param term Tne search term.
+   * @param searchOptions Search options.
    * @return Whether a result was found.
    */
-  public findNext(term: string): boolean {
+  public findNext(term: string, searchOptions?: ISearchOptions): boolean {
     if (!term || term.length === 0) {
       return false;
     }
@@ -43,7 +37,7 @@ export class SearchHelper implements ISearchHelper {
 
     // Search from ydisp + 1 to end
     for (let y = startRow + 1; y < this._terminal._core.buffer.ybase + this._terminal.rows; y++) {
-      result = this._findInLine(term, y);
+      result = this._findInLine(term, y, searchOptions);
       if (result) {
         break;
       }
@@ -52,7 +46,7 @@ export class SearchHelper implements ISearchHelper {
     // Search from the top to the current ydisp
     if (!result) {
       for (let y = 0; y < startRow; y++) {
-        result = this._findInLine(term, y);
+        result = this._findInLine(term, y, searchOptions);
         if (result) {
           break;
         }
@@ -67,9 +61,10 @@ export class SearchHelper implements ISearchHelper {
    * Find the previous instance of the term, then scroll to and select it. If it
    * doesn't exist, do nothing.
    * @param term Tne search term.
+   * @param searchOptions Search options.
    * @return Whether a result was found.
    */
-  public findPrevious(term: string): boolean {
+  public findPrevious(term: string, searchOptions?: ISearchOptions): boolean {
     if (!term || term.length === 0) {
       return false;
     }
@@ -84,7 +79,7 @@ export class SearchHelper implements ISearchHelper {
 
     // Search from ydisp + 1 to end
     for (let y = startRow - 1; y >= 0; y--) {
-      result = this._findInLine(term, y);
+      result = this._findInLine(term, y, searchOptions);
       if (result) {
         break;
       }
@@ -93,7 +88,7 @@ export class SearchHelper implements ISearchHelper {
     // Search from the top to the current ydisp
     if (!result) {
       for (let y = this._terminal._core.buffer.ybase + this._terminal.rows - 1; y > startRow; y--) {
-        result = this._findInLine(term, y);
+        result = this._findInLine(term, y, searchOptions);
         if (result) {
           break;
         }
@@ -106,14 +101,25 @@ export class SearchHelper implements ISearchHelper {
 
   /**
    * Searches a line for a search term.
-   * @param term Tne search term.
+   * @param term The search term.
    * @param y The line to search.
+   * @param searchOptions Search options.
    * @return The search result if it was found.
    */
-  private _findInLine(term: string, y: number): ISearchResult {
+  protected _findInLine(term: string, y: number, searchOptions: ISearchOptions = {}): ISearchResult {
     const lowerStringLine = this._terminal._core.buffer.translateBufferLineToString(y, true).toLowerCase();
     const lowerTerm = term.toLowerCase();
-    let searchIndex = lowerStringLine.indexOf(lowerTerm);
+    let searchIndex = -1;
+    if (searchOptions.regex) {
+      const searchRegex = RegExp(lowerTerm, 'g');
+      const foundTerm = searchRegex.exec(lowerStringLine);
+      if (foundTerm) {
+        searchIndex = searchRegex.lastIndex - foundTerm[0].length;
+        term = foundTerm[0];
+      }
+    } else {
+      searchIndex = lowerStringLine.indexOf(lowerTerm);
+    }
     if (searchIndex >= 0) {
       const line = this._terminal._core.buffer.lines.get(y);
       for (let i = 0; i < searchIndex; i++) {

src/addons/search/search.test.ts

@@ -6,17 +6,17 @@
 import { assert, expect } from 'chai';
 import * as search from './search';
 import { SearchHelper } from './SearchHelper';
-import { ISearchHelper } from './Interfaces';
+import { ISearchOptions, ISearchResult } from './Interfaces';
 
 
 class MockTerminalPlain {}
 
 class MockTerminal {
   private _core: any;
-  public searchHelper: ISearchHelper;
+  public searchHelper: TestSearchHelper;
   constructor(options: any) {
     this._core = new (require('../../../lib/Terminal').Terminal)(options);
-    this.searchHelper = new SearchHelper(this as any);
+    this.searchHelper = new TestSearchHelper(this as any);
   }
   get core(): any {
     return this._core;
@@ -26,6 +26,12 @@ class MockTerminal {
   }
 }
 
+class TestSearchHelper extends SearchHelper {
+  public findInLine(term: string, y: number, searchOptions?: ISearchOptions): ISearchResult {
+    return this._findInLine(term, y, searchOptions);
+  }
+}
+
 describe('search addon', function(): void {
   describe('apply', () => {
     it('should register findNext and findPrevious', () => {
@@ -39,11 +45,40 @@ describe('search addon', function(): void {
     const term = new MockTerminal({cols: 20, rows: 3});
     term.core.write('Hello World\r\ntest\n123....hello');
     term.pushWriteData();
-    const hello0 = (term.searchHelper as any)._findInLine('Hello', 0);
-    const hello1 = (term.searchHelper as any)._findInLine('Hello', 1);
-    const hello2 = (term.searchHelper as any)._findInLine('Hello', 2);
+    const hello0 = term.searchHelper.findInLine('Hello', 0);
+    const hello1 = term.searchHelper.findInLine('Hello', 1);
+    const hello2 = term.searchHelper.findInLine('Hello', 2);
     expect(hello0).eql({col: 0, row: 0, term: 'Hello'});
     expect(hello1).eql(undefined);
     expect(hello2).eql({col: 11, row: 2, term: 'Hello'});
   });
+  it('should respect search regex', function(): void {
+    search.apply(<any>MockTerminal);
+    const term = new MockTerminal({cols: 10, rows: 4});
+    term.core.write('abcdefghijklmnopqrstuvwxyz\r\n~/dev  ');
+    /*
+      abcdefghij
+      klmnopqrst
+      uvwxyz
+      ~/dev
+    */
+    term.pushWriteData();
+    const searchOptions = {
+      regex: true,
+      wholeWord: false,
+      caseSensitive: false
+    };
+    const hello0 = term.searchHelper.findInLine('dee*', 0, searchOptions);
+    term.searchHelper.findInLine('jkk*', 0, searchOptions);
+    term.searchHelper.findInLine('mnn*', 1, searchOptions);
+    const tilda0 = term.searchHelper.findInLine('^~', 3, searchOptions);
+    const tilda1 = term.searchHelper.findInLine('^[~]', 3, searchOptions);
+    const tilda2 = term.searchHelper.findInLine('^\\~', 3, searchOptions);
+    expect(hello0).eql({col: 3, row: 0, term: 'de'});
+    // TODO: uncomment this test when line wrap search is checked in expect(hello1).eql({col: 9, row: 0, term: 'jk'});
+    // TODO: uncomment this test when line wrap search is checked in expect(hello2).eql(undefined);
+    expect(tilda0).eql({col: 0, row: 3, term: '~'});
+    expect(tilda1).eql({col: 0, row: 3, term: '~'});
+    expect(tilda2).eql({col: 0, row: 3, term: '~'});
+  });
 });

src/addons/search/search.ts

@@ -5,42 +5,44 @@
 
 import { SearchHelper } from './SearchHelper';
 import { Terminal } from 'xterm';
-import { ISearchAddonTerminal } from './Interfaces';
+import { ISearchAddonTerminal, ISearchOptions } from './Interfaces';
 
 /**
  * Find the next instance of the term, then scroll to and select it. If it
  * doesn't exist, do nothing.
  * @param term Tne search term.
+ * @param searchOptions Search options
  * @return Whether a result was found.
  */
-export function findNext(terminal: Terminal, term: string): boolean {
+export function findNext(terminal: Terminal, term: string, searchOptions: ISearchOptions = {}): boolean {
   const addonTerminal = <ISearchAddonTerminal>terminal;
   if (!addonTerminal.__searchHelper) {
     addonTerminal.__searchHelper = new SearchHelper(addonTerminal);
   }
-  return addonTerminal.__searchHelper.findNext(term);
+  return addonTerminal.__searchHelper.findNext(term, searchOptions);
 }
 
 /**
  * Find the previous instance of the term, then scroll to and select it. If it
  * doesn't exist, do nothing.
  * @param term Tne search term.
+ * @param searchOptions Search options
  * @return Whether a result was found.
  */
-export function findPrevious(terminal: Terminal, term: string): boolean {
+export function findPrevious(terminal: Terminal, term: string, searchOptions: ISearchOptions): boolean {
   const addonTerminal = <ISearchAddonTerminal>terminal;
   if (!addonTerminal.__searchHelper) {
     addonTerminal.__searchHelper = new SearchHelper(addonTerminal);
   }
-  return addonTerminal.__searchHelper.findPrevious(term);
+  return addonTerminal.__searchHelper.findPrevious(term, searchOptions);
 }
 
 export function apply(terminalConstructor: typeof Terminal): void {
-  (<any>terminalConstructor.prototype).findNext = function(term: string): boolean {
-    return findNext(this, term);
+  (<any>terminalConstructor.prototype).findNext = function(term: string, searchOptions: ISearchOptions): boolean {
+    return findNext(this, term, searchOptions);
   };
 
-  (<any>terminalConstructor.prototype).findPrevious = function(term: string): boolean {
-    return findPrevious(this, term);
+  (<any>terminalConstructor.prototype).findPrevious = function(term: string, searchOptions: ISearchOptions): boolean {
+    return findPrevious(this, term, searchOptions);
   };
 }