141 lines
3.9 KiB
TypeScript
141 lines
3.9 KiB
TypeScript
/**
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* Copyright (c) 2017 The xterm.js authors. All rights reserved.
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* @license MIT
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*/
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// import { ITerminal } from '../../Interfaces';
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// import { translateBufferLineToString } from '../../utils/BufferLine';
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interface ISearchResult {
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term: string;
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col: number;
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row: number;
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}
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/**
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* A class that knows how to search the terminal and how to display the results.
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*/
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export class SearchHelper {
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constructor(private _terminal: any) {
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// TODO: Search for multiple instances on 1 line
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// TODO: Don't use the actual selection, instead use a "find selection" so multiple instances can be highlighted
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// TODO: Highlight other instances in the viewport
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// TODO: Support regex, case sensitivity, etc.
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}
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/**
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* Find the next instance of the term, then scroll to and select it. If it
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* doesn't exist, do nothing.
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* @param term Tne search term.
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* @return Whether a result was found.
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*/
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public findNext(term: string): boolean {
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if (!term || term.length === 0) {
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return false;
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}
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let result: ISearchResult;
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let startRow = this._terminal.buffer.ydisp;
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if (this._terminal.selectionManager.selectionEnd) {
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// Start from the selection end if there is a selection
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startRow = this._terminal.selectionManager.selectionEnd[1];
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}
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// Search from ydisp + 1 to end
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for (let y = startRow + 1; y < this._terminal.buffer.ybase + this._terminal.rows; y++) {
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result = this._findInLine(term, y);
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if (result) {
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break;
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}
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}
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// Search from the top to the current ydisp
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if (!result) {
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for (let y = 0; y < startRow; y++) {
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result = this._findInLine(term, y);
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if (result) {
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break;
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}
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}
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}
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// Set selection and scroll if a result was found
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return this._selectResult(result);
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}
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/**
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* Find the previous instance of the term, then scroll to and select it. If it
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* doesn't exist, do nothing.
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* @param term Tne search term.
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* @return Whether a result was found.
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*/
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public findPrevious(term: string): boolean {
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if (!term || term.length === 0) {
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return false;
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}
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let result: ISearchResult;
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let startRow = this._terminal.buffer.ydisp;
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if (this._terminal.selectionManager.selectionStart) {
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// Start from the selection end if there is a selection
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startRow = this._terminal.selectionManager.selectionStart[1];
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}
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// Search from ydisp + 1 to end
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for (let y = startRow - 1; y >= 0; y--) {
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result = this._findInLine(term, y);
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if (result) {
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break;
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}
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}
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// Search from the top to the current ydisp
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if (!result) {
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for (let y = this._terminal.buffer.ybase + this._terminal.rows - 1; y > startRow; y--) {
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result = this._findInLine(term, y);
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if (result) {
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break;
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}
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}
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}
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// Set selection and scroll if a result was found
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return this._selectResult(result);
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}
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/**
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* Searches a line for a search term.
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* @param term Tne search term.
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* @param y The line to search.
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* @return The search result if it was found.
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*/
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private _findInLine(term: string, y: number): ISearchResult {
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const lowerStringLine = this._terminal.buffer.translateBufferLineToString(y, true).toLowerCase();
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const lowerTerm = term.toLowerCase();
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const searchIndex = lowerStringLine.indexOf(lowerTerm);
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if (searchIndex >= 0) {
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return {
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term,
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col: searchIndex,
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row: y
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};
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}
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}
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/**
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* Selects and scrolls to a result.
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* @param result The result to select.
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* @return Whethera result was selected.
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*/
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private _selectResult(result: ISearchResult): boolean {
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if (!result) {
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return false;
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}
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this._terminal.selectionManager.setSelection(result.col, result.row, result.term.length);
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this._terminal.scrollLines(result.row - this._terminal.buffer.ydisp, false);
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return true;
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}
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}
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