553 lines
22 KiB
TypeScript
553 lines
22 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 { assert, expect } from 'chai';
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import { ITerminal } from './Types';
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import { Buffer, DEFAULT_ATTR, CHAR_DATA_CHAR_INDEX } from './Buffer';
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import { CircularList } from './common/CircularList';
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import { MockTerminal, TestTerminal } from './utils/TestUtils.test';
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import { BufferLine } from './BufferLine';
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const INIT_COLS = 80;
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const INIT_ROWS = 24;
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describe('Buffer', () => {
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let terminal: ITerminal;
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let buffer: Buffer;
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beforeEach(() => {
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terminal = new MockTerminal();
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terminal.cols = INIT_COLS;
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terminal.rows = INIT_ROWS;
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terminal.options.scrollback = 1000;
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buffer = new Buffer(terminal, true);
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});
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describe('constructor', () => {
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it('should create a CircularList with max length equal to rows + scrollback, for its lines', () => {
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assert.instanceOf(buffer.lines, CircularList);
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assert.equal(buffer.lines.maxLength, terminal.rows + terminal.options.scrollback);
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});
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it('should set the Buffer\'s scrollBottom value equal to the terminal\'s rows -1', () => {
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assert.equal(buffer.scrollBottom, terminal.rows - 1);
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});
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});
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describe('fillViewportRows', () => {
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it('should fill the buffer with blank lines based on the size of the viewport', () => {
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const blankLineChar = buffer.getBlankLine(DEFAULT_ATTR).get(0);
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buffer.fillViewportRows();
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assert.equal(buffer.lines.length, INIT_ROWS);
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for (let y = 0; y < INIT_ROWS; y++) {
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assert.equal(buffer.lines.get(y).length, INIT_COLS);
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for (let x = 0; x < INIT_COLS; x++) {
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assert.deepEqual(buffer.lines.get(y).get(x), blankLineChar);
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}
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}
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});
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});
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describe('getWrappedRangeForLine', () => {
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describe('non-wrapped', () => {
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it('should return a single row for the first row', () => {
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buffer.fillViewportRows();
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assert.deepEqual(buffer.getWrappedRangeForLine(0), { first: 0, last: 0 });
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});
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it('should return a single row for a middle row', () => {
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buffer.fillViewportRows();
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assert.deepEqual(buffer.getWrappedRangeForLine(12), { first: 12, last: 12 });
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});
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it('should return a single row for the last row', () => {
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buffer.fillViewportRows();
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assert.deepEqual(buffer.getWrappedRangeForLine(buffer.lines.length - 1), { first: 23, last: 23 });
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});
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});
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describe('wrapped', () => {
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it('should return a range for the first row', () => {
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buffer.fillViewportRows();
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buffer.lines.get(1).isWrapped = true;
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assert.deepEqual(buffer.getWrappedRangeForLine(0), { first: 0, last: 1 });
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});
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it('should return a range for a middle row wrapping upwards', () => {
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buffer.fillViewportRows();
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buffer.lines.get(12).isWrapped = true;
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assert.deepEqual(buffer.getWrappedRangeForLine(12), { first: 11, last: 12 });
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});
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it('should return a range for a middle row wrapping downwards', () => {
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buffer.fillViewportRows();
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buffer.lines.get(13).isWrapped = true;
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assert.deepEqual(buffer.getWrappedRangeForLine(12), { first: 12, last: 13 });
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});
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it('should return a range for a middle row wrapping both ways', () => {
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buffer.fillViewportRows();
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buffer.lines.get(11).isWrapped = true;
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buffer.lines.get(12).isWrapped = true;
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buffer.lines.get(13).isWrapped = true;
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buffer.lines.get(14).isWrapped = true;
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assert.deepEqual(buffer.getWrappedRangeForLine(12), { first: 10, last: 14 });
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});
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it('should return a range for the last row', () => {
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buffer.fillViewportRows();
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buffer.lines.get(23).isWrapped = true;
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assert.deepEqual(buffer.getWrappedRangeForLine(buffer.lines.length - 1), { first: 22, last: 23 });
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});
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it('should return a range for a row that wraps upward to first row', () => {
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buffer.fillViewportRows();
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buffer.lines.get(1).isWrapped = true;
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assert.deepEqual(buffer.getWrappedRangeForLine(1), { first: 0, last: 1 });
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});
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it('should return a range for a row that wraps downward to last row', () => {
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buffer.fillViewportRows();
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buffer.lines.get(buffer.lines.length - 1).isWrapped = true;
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assert.deepEqual(buffer.getWrappedRangeForLine(buffer.lines.length - 2), { first: 22, last: 23 });
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});
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});
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});
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describe('resize', () => {
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describe('column size is reduced', () => {
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it('should not trim the data in the buffer', () => {
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buffer.fillViewportRows();
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buffer.resize(INIT_COLS / 2, INIT_ROWS);
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assert.equal(buffer.lines.length, INIT_ROWS);
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for (let i = 0; i < INIT_ROWS; i++) {
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assert.equal(buffer.lines.get(i).length, INIT_COLS);
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}
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});
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});
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describe('column size is increased', () => {
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it('should add pad columns', () => {
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buffer.fillViewportRows();
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buffer.resize(INIT_COLS + 10, INIT_ROWS);
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assert.equal(buffer.lines.length, INIT_ROWS);
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for (let i = 0; i < INIT_ROWS; i++) {
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assert.equal(buffer.lines.get(i).length, INIT_COLS + 10);
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}
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});
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});
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describe('row size reduced', () => {
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it('should trim blank lines from the end', () => {
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buffer.fillViewportRows();
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buffer.resize(INIT_COLS, INIT_ROWS - 10);
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assert.equal(buffer.lines.length, INIT_ROWS - 10);
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});
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it('should move the viewport down when it\'s at the end', () => {
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buffer.fillViewportRows();
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// Set cursor y to have 5 blank lines below it
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buffer.y = INIT_ROWS - 5 - 1;
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buffer.resize(INIT_COLS, INIT_ROWS - 10);
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// Trim 5 rows
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assert.equal(buffer.lines.length, INIT_ROWS - 5);
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// Shift the viewport down 5 rows
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assert.equal(buffer.ydisp, 5);
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assert.equal(buffer.ybase, 5);
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});
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describe('no scrollback', () => {
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it('should trim from the top of the buffer when the cursor reaches the bottom', () => {
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terminal.options.scrollback = 0;
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buffer = new Buffer(terminal, true);
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assert.equal(buffer.lines.maxLength, INIT_ROWS);
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buffer.y = INIT_ROWS - 1;
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buffer.fillViewportRows();
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let chData = buffer.lines.get(5).get(0);
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chData[1] = 'a';
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buffer.lines.get(5).set(0, chData);
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chData = buffer.lines.get(INIT_ROWS - 1).get(0);
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chData[1] = 'b';
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buffer.lines.get(INIT_ROWS - 1).set(0, chData);
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buffer.resize(INIT_COLS, INIT_ROWS - 5);
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assert.equal(buffer.lines.get(0).get(0)[1], 'a');
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assert.equal(buffer.lines.get(INIT_ROWS - 1 - 5).get(0)[1], 'b');
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});
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});
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});
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describe('row size increased', () => {
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describe('empty buffer', () => {
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it('should add blank lines to end', () => {
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buffer.fillViewportRows();
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assert.equal(buffer.ydisp, 0);
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buffer.resize(INIT_COLS, INIT_ROWS + 10);
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assert.equal(buffer.ydisp, 0);
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assert.equal(buffer.lines.length, INIT_ROWS + 10);
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});
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});
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describe('filled buffer', () => {
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it('should show more of the buffer above', () => {
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buffer.fillViewportRows();
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// Create 10 extra blank lines
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for (let i = 0; i < 10; i++) {
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buffer.lines.push(buffer.getBlankLine(DEFAULT_ATTR));
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}
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// Set cursor to the bottom of the buffer
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buffer.y = INIT_ROWS - 1;
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// Scroll down 10 lines
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buffer.ybase = 10;
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buffer.ydisp = 10;
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assert.equal(buffer.lines.length, INIT_ROWS + 10);
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buffer.resize(INIT_COLS, INIT_ROWS + 5);
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// Should be should 5 more lines
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assert.equal(buffer.ydisp, 5);
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assert.equal(buffer.ybase, 5);
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// Should not trim the buffer
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assert.equal(buffer.lines.length, INIT_ROWS + 10);
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});
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it('should show more of the buffer below when the viewport is at the top of the buffer', () => {
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buffer.fillViewportRows();
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// Create 10 extra blank lines
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for (let i = 0; i < 10; i++) {
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buffer.lines.push(buffer.getBlankLine(DEFAULT_ATTR));
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}
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// Set cursor to the bottom of the buffer
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buffer.y = INIT_ROWS - 1;
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// Scroll down 10 lines
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buffer.ybase = 10;
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buffer.ydisp = 0;
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assert.equal(buffer.lines.length, INIT_ROWS + 10);
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buffer.resize(INIT_COLS, INIT_ROWS + 5);
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// The viewport should remain at the top
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assert.equal(buffer.ydisp, 0);
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// The buffer ybase should move up 5 lines
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assert.equal(buffer.ybase, 5);
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// Should not trim the buffer
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assert.equal(buffer.lines.length, INIT_ROWS + 10);
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});
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});
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});
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describe('row and column increased', () => {
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it('should resize properly', () => {
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buffer.fillViewportRows();
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buffer.resize(INIT_COLS + 5, INIT_ROWS + 5);
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assert.equal(buffer.lines.length, INIT_ROWS + 5);
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for (let i = 0; i < INIT_ROWS + 5; i++) {
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assert.equal(buffer.lines.get(i).length, INIT_COLS + 5);
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}
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});
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});
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});
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describe('buffer marked to have no scrollback', () => {
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it('should always have a scrollback of 0', () => {
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assert.equal(terminal.options.scrollback, 1000);
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// Test size on initialization
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buffer = new Buffer(terminal, false);
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buffer.fillViewportRows();
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assert.equal(buffer.lines.maxLength, INIT_ROWS);
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// Test size on buffer increase
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buffer.resize(INIT_COLS, INIT_ROWS * 2);
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assert.equal(buffer.lines.maxLength, INIT_ROWS * 2);
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// Test size on buffer decrease
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buffer.resize(INIT_COLS, INIT_ROWS / 2);
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assert.equal(buffer.lines.maxLength, INIT_ROWS / 2);
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});
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});
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describe('addMarker', () => {
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it('should adjust a marker line when the buffer is trimmed', () => {
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terminal.options.scrollback = 0;
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buffer = new Buffer(terminal, true);
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buffer.fillViewportRows();
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const marker = buffer.addMarker(buffer.lines.length - 1);
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assert.equal(marker.line, buffer.lines.length - 1);
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buffer.lines.emit('trim', 1);
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assert.equal(marker.line, buffer.lines.length - 2);
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});
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it('should dispose of a marker if it is trimmed off the buffer', () => {
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terminal.options.scrollback = 0;
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buffer = new Buffer(terminal, true);
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buffer.fillViewportRows();
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assert.equal(buffer.markers.length, 0);
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const marker = buffer.addMarker(0);
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assert.equal(marker.isDisposed, false);
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assert.equal(buffer.markers.length, 1);
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buffer.lines.emit('trim', 1);
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assert.equal(marker.isDisposed, true);
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assert.equal(buffer.markers.length, 0);
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});
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});
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describe ('translateBufferLineToString', () => {
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it('should handle selecting a section of ascii text', () => {
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const line = new BufferLine(4);
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line.set(0, [ null, 'a', 1, 'a'.charCodeAt(0)]);
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line.set(1, [ null, 'b', 1, 'b'.charCodeAt(0)]);
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line.set(2, [ null, 'c', 1, 'c'.charCodeAt(0)]);
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line.set(3, [ null, 'd', 1, 'd'.charCodeAt(0)]);
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buffer.lines.set(0, line);
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const str = buffer.translateBufferLineToString(0, true, 0, 2);
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assert.equal(str, 'ab');
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});
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it('should handle a cut-off double width character by including it', () => {
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const line = new BufferLine(3);
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line.set(0, [ null, '語', 2, 35486 ]);
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line.set(1, [ null, '', 0, null]);
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line.set(2, [ null, 'a', 1, 'a'.charCodeAt(0)]);
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buffer.lines.set(0, line);
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const str1 = buffer.translateBufferLineToString(0, true, 0, 1);
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assert.equal(str1, '語');
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});
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it('should handle a zero width character in the middle of the string by not including it', () => {
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const line = new BufferLine(3);
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line.set(0, [ null, '語', 2, '語'.charCodeAt(0) ]);
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line.set(1, [ null, '', 0, null]);
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line.set(2, [ null, 'a', 1, 'a'.charCodeAt(0)]);
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buffer.lines.set(0, line);
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const str0 = buffer.translateBufferLineToString(0, true, 0, 1);
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assert.equal(str0, '語');
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const str1 = buffer.translateBufferLineToString(0, true, 0, 2);
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assert.equal(str1, '語');
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const str2 = buffer.translateBufferLineToString(0, true, 0, 3);
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assert.equal(str2, '語a');
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});
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it('should handle single width emojis', () => {
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const line = new BufferLine(2);
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line.set(0, [ null, '😁', 1, '😁'.charCodeAt(0) ]);
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line.set(1, [ null, 'a', 1, 'a'.charCodeAt(0)]);
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buffer.lines.set(0, line);
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const str1 = buffer.translateBufferLineToString(0, true, 0, 1);
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assert.equal(str1, '😁');
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const str2 = buffer.translateBufferLineToString(0, true, 0, 2);
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assert.equal(str2, '😁a');
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});
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it('should handle double width emojis', () => {
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const line = new BufferLine(2);
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line.set(0, [ null, '😁', 2, '😁'.charCodeAt(0) ]);
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line.set(1, [ null, '', 0, null]);
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buffer.lines.set(0, line);
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const str1 = buffer.translateBufferLineToString(0, true, 0, 1);
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assert.equal(str1, '😁');
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const str2 = buffer.translateBufferLineToString(0, true, 0, 2);
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assert.equal(str2, '😁');
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const line2 = new BufferLine(3);
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line2.set(0, [ null, '😁', 2, '😁'.charCodeAt(0) ]);
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line2.set(1, [ null, '', 0, null]);
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line2.set(2, [ null, 'a', 1, 'a'.charCodeAt(0)]);
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buffer.lines.set(0, line2);
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const str3 = buffer.translateBufferLineToString(0, true, 0, 3);
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assert.equal(str3, '😁a');
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});
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});
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describe('stringIndexToBufferIndex', () => {
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let terminal: TestTerminal;
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beforeEach(() => {
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terminal = new TestTerminal({rows: 5, cols: 10});
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});
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it('multiline ascii', () => {
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const input = 'This is ASCII text spanning multiple lines.';
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terminal.writeSync(input);
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const s = terminal.buffer.iterator(true).next().content;
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assert.equal(input, s);
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for (let i = 0; i < input.length; ++i) {
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const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
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assert.deepEqual([(i / terminal.cols) | 0, i % terminal.cols], bufferIndex);
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}
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});
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it('combining e\u0301 in a sentence', () => {
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const input = 'Sitting in the cafe\u0301 drinking coffee.';
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terminal.writeSync(input);
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const s = terminal.buffer.iterator(true).next().content;
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assert.equal(input, s);
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for (let i = 0; i < 19; ++i) {
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const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
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assert.deepEqual([(i / terminal.cols) | 0, i % terminal.cols], bufferIndex);
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}
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// string index 18 & 19 point to combining char e\u0301 ---> same buffer Index
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assert.deepEqual(
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terminal.buffer.stringIndexToBufferIndex(0, 18),
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terminal.buffer.stringIndexToBufferIndex(0, 19));
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// after the combining char every string index has an offset of -1
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for (let i = 19; i < input.length; ++i) {
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const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
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assert.deepEqual([((i - 1) / terminal.cols) | 0, (i - 1) % terminal.cols], bufferIndex);
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}
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});
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it('multiline combining e\u0301', () => {
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const input = 'e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301e\u0301';
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terminal.writeSync(input);
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const s = terminal.buffer.iterator(true).next().content;
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assert.equal(input, s);
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// every buffer cell index contains 2 string indices
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for (let i = 0; i < input.length; ++i) {
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const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
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assert.deepEqual([((i >> 1) / terminal.cols) | 0, (i >> 1) % terminal.cols], bufferIndex);
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}
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});
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it('surrogate char in a sentence', () => {
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const input = 'The 𝄞 is a clef widely used in modern notation.';
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terminal.writeSync(input);
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const s = terminal.buffer.iterator(true).next().content;
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assert.equal(input, s);
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for (let i = 0; i < 5; ++i) {
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const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
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assert.deepEqual([(i / terminal.cols) | 0, i % terminal.cols], bufferIndex);
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}
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// string index 4 & 5 point to surrogate char 𝄞 ---> same buffer Index
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assert.deepEqual(
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terminal.buffer.stringIndexToBufferIndex(0, 4),
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terminal.buffer.stringIndexToBufferIndex(0, 5));
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// after the combining char every string index has an offset of -1
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for (let i = 5; i < input.length; ++i) {
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const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
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assert.deepEqual([((i - 1) / terminal.cols) | 0, (i - 1) % terminal.cols], bufferIndex);
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}
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});
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it('multiline surrogate char', () => {
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const input = '𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞𝄞';
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terminal.writeSync(input);
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const s = terminal.buffer.iterator(true).next().content;
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assert.equal(input, s);
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// every buffer cell index contains 2 string indices
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for (let i = 0; i < input.length; ++i) {
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const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
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assert.deepEqual([((i >> 1) / terminal.cols) | 0, (i >> 1) % terminal.cols], bufferIndex);
|
|
}
|
|
});
|
|
|
|
it('surrogate char with combining', () => {
|
|
// eye of Ra with acute accent - string length of 3
|
|
const input = '𓂀\u0301 - the eye hiroglyph with an acute accent.';
|
|
terminal.writeSync(input);
|
|
const s = terminal.buffer.iterator(true).next().content;
|
|
assert.equal(input, s);
|
|
// index 0..2 should map to 0
|
|
assert.deepEqual([0, 0], terminal.buffer.stringIndexToBufferIndex(0, 1));
|
|
assert.deepEqual([0, 0], terminal.buffer.stringIndexToBufferIndex(0, 2));
|
|
for (let i = 2; i < input.length; ++i) {
|
|
const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
|
|
assert.deepEqual([((i - 2) / terminal.cols) | 0, (i - 2) % terminal.cols], bufferIndex);
|
|
}
|
|
});
|
|
|
|
it('multiline surrogate with combining', () => {
|
|
const input = '𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301𓂀\u0301';
|
|
terminal.writeSync(input);
|
|
const s = terminal.buffer.iterator(true).next().content;
|
|
assert.equal(input, s);
|
|
// every buffer cell index contains 3 string indices
|
|
for (let i = 0; i < input.length; ++i) {
|
|
const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
|
|
assert.deepEqual([(((i / 3) | 0) / terminal.cols) | 0, ((i / 3) | 0) % terminal.cols], bufferIndex);
|
|
}
|
|
});
|
|
|
|
it('fullwidth chars', () => {
|
|
const input = 'These １２３ are some fat numbers.';
|
|
terminal.writeSync(input);
|
|
const s = terminal.buffer.iterator(true).next().content;
|
|
assert.equal(input, s);
|
|
for (let i = 0; i < 6; ++i) {
|
|
const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
|
|
assert.deepEqual([(i / terminal.cols) | 0, i % terminal.cols], bufferIndex);
|
|
}
|
|
// string index 6, 7, 8 take 2 cells
|
|
assert.deepEqual([0, 8], terminal.buffer.stringIndexToBufferIndex(0, 7));
|
|
assert.deepEqual([1, 0], terminal.buffer.stringIndexToBufferIndex(0, 8));
|
|
// rest of the string has offset of +3
|
|
for (let i = 9; i < input.length; ++i) {
|
|
const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
|
|
assert.deepEqual([((i + 3) / terminal.cols) | 0, (i + 3) % terminal.cols], bufferIndex);
|
|
}
|
|
});
|
|
|
|
it('multiline fullwidth chars', () => {
|
|
const input = '１２３４５６７８９０１２３４５６７８９０';
|
|
terminal.writeSync(input);
|
|
const s = terminal.buffer.iterator(true).next().content;
|
|
assert.equal(input, s);
|
|
for (let i = 9; i < input.length; ++i) {
|
|
const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i);
|
|
assert.deepEqual([((i << 1) / terminal.cols) | 0, (i << 1) % terminal.cols], bufferIndex);
|
|
}
|
|
});
|
|
|
|
it('fullwidth combining with emoji - match emoji cell', () => {
|
|
const input = 'Lots of ￥\u0301 make me 😃.';
|
|
terminal.writeSync(input);
|
|
const s = terminal.buffer.iterator(true).next().content;
|
|
assert.equal(input, s);
|
|
const stringIndex = s.match(/😃/).index;
|
|
const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, stringIndex);
|
|
assert(terminal.buffer.lines.get(bufferIndex[0]).get(bufferIndex[1])[CHAR_DATA_CHAR_INDEX], '😃');
|
|
});
|
|
|
|
it('multiline fullwidth chars with offset 1 (currently tests for broken behavior)', () => {
|
|
const input = 'a１２３４５６７８９０１２３４５６７８９０';
|
|
// the 'a' at the beginning moves all fullwidth chars one to the right
|
|
// now the end of the line contains a dangling empty cell since
|
|
// the next fullwidth char has to wrap early
|
|
// the dangling last cell is wrongly added in the string
|
|
// --> fixable after resolving #1685
|
|
terminal.writeSync(input);
|
|
// TODO: reenable after fix
|
|
// const s = terminal.buffer.contents(true).toArray()[0];
|
|
// assert.equal(input, s);
|
|
for (let i = 10; i < input.length; ++i) {
|
|
const bufferIndex = terminal.buffer.stringIndexToBufferIndex(0, i + 1); // TODO: remove +1 after fix
|
|
const j = (i - 0) << 1;
|
|
assert.deepEqual([(j / terminal.cols) | 0, j % terminal.cols], bufferIndex);
|
|
}
|
|
});
|
|
});
|
|
describe('BufferStringIterator', function(): void {
|
|
it('iterator does not ovrflow buffer limits', function(): void {
|
|
const terminal = new TestTerminal({rows: 5, cols: 10, scrollback: 5});
|
|
const data = [
|
|
'aaaaaaaaaa',
|
|
'aaaaaaaaa\n',
|
|
'aaaaaaaaaa',
|
|
'aaaaaaaaa\n',
|
|
'aaaaaaaaaa',
|
|
'aaaaaaaaaa',
|
|
'aaaaaaaaaa',
|
|
'aaaaaaaaa\n',
|
|
'aaaaaaaaaa',
|
|
'aaaaaaaaaa'
|
|
];
|
|
terminal.writeSync(data.join(''));
|
|
// brute force test with insane values
|
|
expect(() => {
|
|
for (let overscan = 0; overscan < 20; ++overscan) {
|
|
for (let start = -10; start < 20; ++start) {
|
|
for (let end = -10; end < 20; ++end) {
|
|
const it = terminal.buffer.iterator(false, start, end, overscan, overscan);
|
|
while (it.hasNext()) {
|
|
it.next();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}).to.not.throw();
|
|
});
|
|
});
|
|
});
|