Change case of search addon files

src/addons/search/SearchHelper.ts

@@ -0,0 +1,140 @@
+/**
+ * @license MIT
+ */
+
+// import { ITerminal } from '../../Interfaces';
+// import { translateBufferLineToString } from '../../utils/BufferLine';
+
+interface ISearchResult {
+  term: string;
+  col: number;
+  row: number;
+}
+
+/**
+ * A class that knows how to search the terminal and how to display the results.
+ */
+export class SearchHelper {
+  constructor(private _terminal: any, private _translateBufferLineToString: any) {
+    // 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.
+   * @return Whether a result was found.
+   */
+  public findNext(term: string): boolean {
+    if (!term || term.length === 0) {
+      return false;
+    }
+
+    let result: ISearchResult;
+
+    let startRow = this._terminal.ydisp;
+    if (this._terminal.selectionManager.selectionEnd) {
+      // Start from the selection end if there is a selection
+      startRow = this._terminal.selectionManager.selectionEnd[1];
+    }
+
+    // Search from ydisp + 1 to end
+    for (let y = startRow + 1; y < this._terminal.ybase + this._terminal.rows; y++) {
+      result = this._findInLine(term, y);
+      if (result) {
+        break;
+      }
+    }
+
+    // Search from the top to the current ydisp
+    if (!result) {
+      for (let y = 0; y < startRow; y++) {
+        result = this._findInLine(term, y);
+        if (result) {
+          break;
+        }
+      }
+    }
+
+    // Set selection and scroll if a result was found
+    return this._selectResult(result);
+  }
+
+  /**
+   * 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.
+   * @return Whether a result was found.
+   */
+  public findPrevious(term: string): boolean {
+    if (!term || term.length === 0) {
+      return false;
+    }
+
+    let result: ISearchResult;
+
+    let startRow = this._terminal.ydisp;
+    if (this._terminal.selectionManager.selectionStart) {
+      // Start from the selection end if there is a selection
+      startRow = this._terminal.selectionManager.selectionStart[1];
+    }
+
+    // Search from ydisp + 1 to end
+    for (let y = startRow - 1; y >= 0; y--) {
+      result = this._findInLine(term, y);
+      if (result) {
+        break;
+      }
+    }
+
+    // Search from the top to the current ydisp
+    if (!result) {
+      for (let y = this._terminal.ybase + this._terminal.rows - 1; y > startRow; y--) {
+        result = this._findInLine(term, y);
+        if (result) {
+          break;
+        }
+      }
+    }
+
+    // Set selection and scroll if a result was found
+    return this._selectResult(result);
+  }
+
+  /**
+   * Searches a line for a search term.
+   * @param term Tne search term.
+   * @param y The line to search.
+   * @return The search result if it was found.
+   */
+  private _findInLine(term: string, y: number): ISearchResult {
+    const bufferLine = this._terminal.lines.get(y);
+    const lowerStringLine = this._translateBufferLineToString(bufferLine, true).toLowerCase();
+    const lowerTerm = term.toLowerCase();
+    const searchIndex = lowerStringLine.indexOf(lowerTerm);
+    if (searchIndex >= 0) {
+      return {
+        term,
+        col: searchIndex,
+        row: y
+      };
+    }
+  }
+
+  /**
+   * Selects and scrolls to a result.
+   * @param result The result to select.
+   * @return Whethera result was selected.
+   */
+  private _selectResult(result: ISearchResult): boolean {
+    if (!result) {
+      return false;
+    }
+    this._terminal.selectionManager.setSelection(result.col, result.row, result.term.length);
+    this._terminal.scrollDisp(result.row - this._terminal.ydisp, false);
+    return true;
+  }
+}