116 lines
3.8 KiB
TypeScript
116 lines
3.8 KiB
TypeScript
/**
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* Copyright (c) 2018 The xterm.js authors. All rights reserved.
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* @license MIT
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*/
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import { CHAR_DATA_CHAR_INDEX, CHAR_DATA_ATTR_INDEX, CHAR_DATA_WIDTH_INDEX, CHAR_DATA_CODE_INDEX, NULL_CELL_CODE, WHITESPACE_CELL_CHAR } from '../../Buffer';
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import { FLAGS } from '../Types';
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import { IBufferLine } from '../../Types';
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import { DEFAULT_COLOR, INVERTED_DEFAULT_COLOR } from '../atlas/Types';
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export const BOLD_CLASS = 'xterm-bold';
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export const ITALIC_CLASS = 'xterm-italic';
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export const CURSOR_CLASS = 'xterm-cursor';
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export const CURSOR_STYLE_BLOCK_CLASS = 'xterm-cursor-block';
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export const CURSOR_STYLE_BAR_CLASS = 'xterm-cursor-bar';
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export const CURSOR_STYLE_UNDERLINE_CLASS = 'xterm-cursor-underline';
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export class DomRendererRowFactory {
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constructor(
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private _document: Document
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) {
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}
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public createRow(lineData: IBufferLine, isCursorRow: boolean, cursorStyle: string | undefined, cursorX: number, cellWidth: number, cols: number): DocumentFragment {
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const fragment = this._document.createDocumentFragment();
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// Find the line length first, this prevents the need to output a bunch of
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// empty cells at the end. This cannot easily be integrated into the main
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// loop below because of the colCount feature (which can be removed after we
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// properly support reflow and disallow data to go beyond the right-side of
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// the viewport).
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let lineLength = 0;
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for (let x = Math.min(lineData.length, cols) - 1; x >= 0; x--) {
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const charData = lineData.get(x);
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const code = charData[CHAR_DATA_CODE_INDEX];
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if (code !== NULL_CELL_CODE || (isCursorRow && x === cursorX)) {
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lineLength = x + 1;
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break;
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}
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}
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for (let x = 0; x < lineLength; x++) {
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const charData = lineData.get(x);
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const char = charData[CHAR_DATA_CHAR_INDEX] || WHITESPACE_CELL_CHAR;
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const attr = charData[CHAR_DATA_ATTR_INDEX];
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const width = charData[CHAR_DATA_WIDTH_INDEX];
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// The character to the left is a wide character, drawing is owned by the char at x-1
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if (width === 0) {
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continue;
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}
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const charElement = this._document.createElement('span');
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if (width > 1) {
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charElement.style.width = `${cellWidth * width}px`;
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}
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const flags = attr >> 18;
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let bg = attr & 0x1ff;
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let fg = (attr >> 9) & 0x1ff;
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if (isCursorRow && x === cursorX) {
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charElement.classList.add(CURSOR_CLASS);
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switch (cursorStyle) {
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case 'bar':
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charElement.classList.add(CURSOR_STYLE_BAR_CLASS);
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break;
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case 'underline':
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charElement.classList.add(CURSOR_STYLE_UNDERLINE_CLASS);
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break;
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default:
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charElement.classList.add(CURSOR_STYLE_BLOCK_CLASS);
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break;
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}
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}
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// If inverse flag is on, the foreground should become the background.
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if (flags & FLAGS.INVERSE) {
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const temp = bg;
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bg = fg;
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fg = temp;
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if (fg === DEFAULT_COLOR) {
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fg = INVERTED_DEFAULT_COLOR;
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}
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if (bg === DEFAULT_COLOR) {
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bg = INVERTED_DEFAULT_COLOR;
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}
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}
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if (flags & FLAGS.BOLD) {
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// Convert the FG color to the bold variant. This should not happen when
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// the fg is the inverse default color as there is no bold variant.
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if (fg < 8) {
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fg += 8;
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}
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charElement.classList.add(BOLD_CLASS);
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}
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if (flags & FLAGS.ITALIC) {
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charElement.classList.add(ITALIC_CLASS);
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}
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charElement.textContent = char;
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if (fg !== DEFAULT_COLOR) {
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charElement.classList.add(`xterm-fg-${fg}`);
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}
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if (bg !== DEFAULT_COLOR) {
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charElement.classList.add(`xterm-bg-${bg}`);
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}
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fragment.appendChild(charElement);
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}
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return fragment;
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}
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}
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