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add wide char handling to bufferline primitives

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This commit is contained in:
Jörg Breitbart
2019-12-21 21:40:01 +01:00
parent f1e01c7166
commit 2b4da1f88e
2 changed files with 124 additions and 4 deletions
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src/common/buffer/BufferLine.test.ts
+90
View File
@@ -366,4 +366,94 @@ describe('BufferLine', function(): void {
chai.assert.equal(cell.isCombined(), Content.IS_COMBINED_MASK);
});
});
describe('correct fullwidth handling', () => {
function populate(line: BufferLine): void {
const cell = CellData.fromCharData([1, '￥', 2, '￥'.charCodeAt(0)]);
for (let i = 0; i < line.length; i += 2) {
line.setCell(i, cell);
}
}
it('insert - wide char at pos', () => {
const line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.insertCells(9, 1, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), '￥￥￥￥ a');
line.insertCells(8, 1, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), '￥￥￥￥a ');
line.insertCells(1, 1, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' a ￥￥￥a');
});
it('insert - wide char at end', () => {
const line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.insertCells(0, 3, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'aaa￥￥￥ ');
line.insertCells(4, 1, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'aaa a ￥￥');
line.insertCells(4, 1, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'aaa aa ￥ ');
});
it('delete', () => {
const line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.deleteCells(0, 1, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' ￥￥￥￥a');
line.deleteCells(5, 2, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' ￥￥￥aaa');
line.deleteCells(0, 2, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' ￥￥aaaaa');
});
it('replace - start at 0', () => {
let line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(0, 1, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'a ￥￥￥￥');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(0, 2, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'aa￥￥￥￥');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(0, 3, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'aaa ￥￥￥');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(0, 8, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'aaaaaaaa￥');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(0, 9, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'aaaaaaaaa ');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(0, 10, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), 'aaaaaaaaaa');
});
it('replace - start at 1', () => {
let line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(1, 2, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' a￥￥￥￥');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(1, 3, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' aa ￥￥￥');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(1, 4, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' aaa￥￥￥');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(1, 8, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' aaaaaaa￥');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(1, 9, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' aaaaaaaa ');
line = new TestBufferLine(10, CellData.fromCharData([DEFAULT_ATTR, NULL_CELL_CHAR, 0, NULL_CELL_CODE]), false);
populate(line);
line.replaceCells(1, 10, CellData.fromCharData([1, 'a', 1, 'a'.charCodeAt(0)]));
chai.assert.equal(line.translateToString(), ' aaaaaaaaa');
});
});
});
src/common/buffer/BufferLine.ts
+34 -4
View File
@@ -3,7 +3,7 @@
* @license MIT
*/
import { CharData, IBufferLine, ICellData } from 'common/Types';
import { CharData, IBufferLine, ICellData, IAttributeData } from 'common/Types';
import { stringFromCodePoint } from 'common/input/TextDecoder';
import { CHAR_DATA_CHAR_INDEX, CHAR_DATA_WIDTH_INDEX, CHAR_DATA_ATTR_INDEX, NULL_CELL_CHAR, NULL_CELL_WIDTH, NULL_CELL_CODE, WHITESPACE_CELL_CHAR, Content } from 'common/buffer/Constants';
import { CellData } from 'common/buffer/CellData';
@@ -228,8 +228,14 @@ export class BufferLine implements IBufferLine {
}
}
public insertCells(pos: number, n: number, fillCellData: ICellData): void {
public insertCells(pos: number, n: number, fillCellData: ICellData, eraseAttr?: IAttributeData): void {
pos %= this.length;
// handle fullwidth at pos: reset cell one to the left if pos is second cell of a wide char
if (pos && this.getWidth(pos - 1) === 2) {
this.setCellFromCodePoint(pos - 1, 0, 1, eraseAttr?.fg || 0, eraseAttr?.bg || 0);
}
if (n < this.length - pos) {
const cell = new CellData();
for (let i = this.length - pos - n - 1; i >= 0; --i) {
@@ -243,9 +249,14 @@ export class BufferLine implements IBufferLine {
this.setCell(i, fillCellData);
}
}
// handle fullwidth at line end: reset last cell if it is first cell of a wide char
if (this.getWidth(this.length - 1) === 2) {
this.setCellFromCodePoint(this.length - 1, 0, 1, eraseAttr?.fg || 0, eraseAttr?.bg || 0);
}
}
public deleteCells(pos: number, n: number, fillCellData: ICellData): void {
public deleteCells(pos: number, n: number, fillCellData: ICellData, eraseAttr?: IAttributeData): void {
pos %= this.length;
if (n < this.length - pos) {
const cell = new CellData();
@@ -260,9 +271,28 @@ export class BufferLine implements IBufferLine {
this.setCell(i, fillCellData);
}
}
// handle fullwidth at pos:
// - reset pos-1 if wide char
// - reset pos if width==0 (previous second cell of a wide char)
if (pos && this.getWidth(pos - 1) === 2) {
this.setCellFromCodePoint(pos - 1, 0, 1, eraseAttr?.fg || 0, eraseAttr?.bg || 0);
}
if (this.getWidth(pos) === 0 && !this.hasContent(pos)) {
this.setCellFromCodePoint(pos, 0, 1, eraseAttr?.fg || 0, eraseAttr?.bg || 0);
}
}
public replaceCells(start: number, end: number, fillCellData: ICellData): void {
public replaceCells(start: number, end: number, fillCellData: ICellData, eraseAttr?: IAttributeData): void {
// handle fullwidth at start: reset cell one to the left if start is second cell of a wide char
if (start && this.getWidth(start - 1) === 2) {
this.setCellFromCodePoint(start - 1, 0, 1, eraseAttr?.fg || 0, eraseAttr?.bg || 0);
}
// handle fullwidth at last cell + 1: reset to empty cell if it is second part of a wide char
if (end < this.length && this.getWidth(end - 1) === 2) {
this.setCellFromCodePoint(end, 0, 1, eraseAttr?.fg || 0, eraseAttr?.bg || 0);
}
while (start < end && start < this.length) {
this.setCell(start++, fillCellData);
}