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SerializeAsHTML(): Fallback to default ansi colors when running headless terminal #4196

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Nov 4, 2022
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22 changes: 21 additions & 1 deletion addons/xterm-addon-serialize/src/SerializeAddon.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -74,7 +74,7 @@ describe('xterm-addon-serialize', () => {
terminal = new Terminal({ cols: 10, rows: 2, allowProposedApi: true });
terminal.loadAddon(serializeAddon);

(terminal as any)._core._themeService = new ThemeService(new OptionsService({}));
(terminal as any)._core._themeService = new ThemeService((terminal as any)._core.optionsService);
(terminal as any)._core._selectionService = new TestSelectionService((terminal as any)._core._bufferService);
});

Expand Down Expand Up @@ -205,5 +205,25 @@ describe('xterm-addon-serialize', () => {
});
assert.equal((output.match(/color: #ffffff; background-color: #000000; font-family: courier-new, courier, monospace; font-size: 15px;/g) || []).length, 1, output);
});

it('cells with custom color styling', async () => {
terminal.options.theme.black = '#ffa500';
terminal.options.theme = { ... terminal.options.theme };

await writeP(terminal, ' ' + sgr('38;5;0') + 'terminal' + sgr('39') + ' ');

const output = serializeAddon.serializeAsHTML();
assert.equal((output.match(/<span style='color: #ffa500;'>terminal<\/span>/g) || []).length, 1, output);
});

it('cells with color styling - xterm headless', async () => {
// a headless terminal doesn't have a themeservice
(terminal as any)._core._themeService = undefined;

await writeP(terminal, ' ' + sgr('38;5;46') + 'terminal' + sgr('39') + ' ');

const output = serializeAddon.serializeAsHTML();
assert.equal((output.match(/<span style='color: #00ff00;'>terminal<\/span>/g) || []).length, 1, output);
});
});
});
16 changes: 11 additions & 5 deletions addons/xterm-addon-serialize/src/SerializeAddon.ts
Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,8 @@

import { Terminal, ITerminalAddon, IBuffer, IBufferCell, IBufferRange } from 'xterm';
import { IColorSet } from 'browser/Types';
import { IAttributeData } from 'common/Types';
import { IAttributeData, IColor } from 'common/Types';
import { DEFAULT_ANSI_COLORS } from 'browser/services/ThemeService';

function constrain(value: number, low: number, high: number): number {
return Math.max(low, Math.min(value, high));
Expand Down Expand Up @@ -534,7 +535,7 @@ export class HTMLSerializeHandler extends BaseSerializeHandler {

private _htmlContent = '';

private _colors: IColorSet;
private _ansiColors: Readonly<IColor[]>;

constructor(
buffer: IBuffer,
Expand All @@ -543,8 +544,13 @@ export class HTMLSerializeHandler extends BaseSerializeHandler {
) {
super(buffer);

// https://github.com/xtermjs/xterm.js/issues/3601
this._colors = (_terminal as any)._core._themeService.colors;
// For xterm headless: fallback to ansi colors
if ((_terminal as any)._core._themeService) {
this._ansiColors = (_terminal as any)._core._themeService.colors.ansi;
}
else {
this._ansiColors = DEFAULT_ANSI_COLORS;
}
}

private _padStart(target: string, targetLength: number, padString: string): string {
Expand Down Expand Up @@ -600,7 +606,7 @@ export class HTMLSerializeHandler extends BaseSerializeHandler {
return rgb.map(x => this._padStart(x.toString(16), 2, '0')).join('');
}
if (isFg ? cell.isFgPalette() : cell.isBgPalette()) {
return this._colors.ansi[color].css;
return this._ansiColors[color].css;
}
return undefined;
}
Expand Down