155 lines
3.9 KiB
TypeScript
155 lines
3.9 KiB
TypeScript
/**
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* Copyright (c) 2019 The xterm.js authors. All rights reserved.
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* @license MIT
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*/
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export const DEFAULT_COLOR = 0;
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export const DEFAULT_ATTR = (0 << 18) | (DEFAULT_COLOR << 9) | (256 << 0);
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export const DEFAULT_EXT = 0;
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export const CHAR_DATA_ATTR_INDEX = 0;
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export const CHAR_DATA_CHAR_INDEX = 1;
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export const CHAR_DATA_WIDTH_INDEX = 2;
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export const CHAR_DATA_CODE_INDEX = 3;
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/**
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* Null cell - a real empty cell (containing nothing).
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* Note that code should always be 0 for a null cell as
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* several test condition of the buffer line rely on this.
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*/
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export const NULL_CELL_CHAR = '';
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export const NULL_CELL_WIDTH = 1;
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export const NULL_CELL_CODE = 0;
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/**
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* Whitespace cell.
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* This is meant as a replacement for empty cells when needed
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* during rendering lines to preserve correct aligment.
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*/
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export const WHITESPACE_CELL_CHAR = ' ';
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export const WHITESPACE_CELL_WIDTH = 1;
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export const WHITESPACE_CELL_CODE = 32;
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/**
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* Bitmasks for accessing data in `content`.
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*/
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export const enum Content {
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/**
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* bit 1..21 codepoint, max allowed in UTF32 is 0x10FFFF (21 bits taken)
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* read: `codepoint = content & Content.codepointMask;`
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* write: `content |= codepoint & Content.codepointMask;`
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* shortcut if precondition `codepoint <= 0x10FFFF` is met:
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* `content |= codepoint;`
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*/
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CODEPOINT_MASK = 0x1FFFFF,
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/**
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* bit 22 flag indication whether a cell contains combined content
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* read: `isCombined = content & Content.isCombined;`
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* set: `content |= Content.isCombined;`
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* clear: `content &= ~Content.isCombined;`
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*/
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IS_COMBINED_MASK = 0x200000, // 1 << 21
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/**
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* bit 1..22 mask to check whether a cell contains any string data
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* we need to check for codepoint and isCombined bits to see
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* whether a cell contains anything
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* read: `isEmpty = !(content & Content.hasContent)`
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*/
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HAS_CONTENT_MASK = 0x3FFFFF,
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/**
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* bit 23..24 wcwidth value of cell, takes 2 bits (ranges from 0..2)
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* read: `width = (content & Content.widthMask) >> Content.widthShift;`
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* `hasWidth = content & Content.widthMask;`
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* as long as wcwidth is highest value in `content`:
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* `width = content >> Content.widthShift;`
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* write: `content |= (width << Content.widthShift) & Content.widthMask;`
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* shortcut if precondition `0 <= width <= 3` is met:
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* `content |= width << Content.widthShift;`
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*/
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WIDTH_MASK = 0xC00000, // 3 << 22
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WIDTH_SHIFT = 22
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}
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export const enum Attributes {
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/**
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* bit 1..8 blue in RGB, color in P256 and P16
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*/
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BLUE_MASK = 0xFF,
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BLUE_SHIFT = 0,
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PCOLOR_MASK = 0xFF,
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PCOLOR_SHIFT = 0,
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/**
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* bit 9..16 green in RGB
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*/
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GREEN_MASK = 0xFF00,
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GREEN_SHIFT = 8,
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/**
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* bit 17..24 red in RGB
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*/
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RED_MASK = 0xFF0000,
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RED_SHIFT = 16,
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/**
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* bit 25..26 color mode: DEFAULT (0) | P16 (1) | P256 (2) | RGB (3)
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*/
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CM_MASK = 0x3000000,
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CM_DEFAULT = 0,
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CM_P16 = 0x1000000,
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CM_P256 = 0x2000000,
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CM_RGB = 0x3000000,
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/**
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* bit 1..24 RGB room
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*/
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RGB_MASK = 0xFFFFFF
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}
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export const enum FgFlags {
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/**
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* bit 27..32
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*/
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INVERSE = 0x4000000,
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BOLD = 0x8000000,
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UNDERLINE = 0x10000000,
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BLINK = 0x20000000,
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INVISIBLE = 0x40000000,
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STRIKETHROUGH = 0x80000000,
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}
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export const enum BgFlags {
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/**
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* bit 27..32 (upper 2 unused)
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*/
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ITALIC = 0x4000000,
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DIM = 0x8000000,
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HAS_EXTENDED = 0x10000000,
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PROTECTED = 0x20000000,
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OVERLINE = 0x40000000
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}
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export const enum ExtFlags {
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/**
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* bit 27..29
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*/
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UNDERLINE_STYLE = 0x1C000000,
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/**
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* bit 30..32
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*/
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VARIANT_OFFSET = 0xE0000000
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}
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export const enum UnderlineStyle {
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NONE = 0,
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SINGLE = 1,
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DOUBLE = 2,
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CURLY = 3,
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DOTTED = 4,
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DASHED = 5
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}
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