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Diffstat (limited to 'node_modules/xterm/src/common/buffer/Constants.ts')
-rw-r--r-- | node_modules/xterm/src/common/buffer/Constants.ts | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/node_modules/xterm/src/common/buffer/Constants.ts b/node_modules/xterm/src/common/buffer/Constants.ts new file mode 100644 index 0000000..a2c1b88 --- /dev/null +++ b/node_modules/xterm/src/common/buffer/Constants.ts @@ -0,0 +1,139 @@ +/** + * Copyright (c) 2019 The xterm.js authors. All rights reserved. + * @license MIT + */ + +export const DEFAULT_COLOR = 256; +export const DEFAULT_ATTR = (0 << 18) | (DEFAULT_COLOR << 9) | (256 << 0); + +export const CHAR_DATA_ATTR_INDEX = 0; +export const CHAR_DATA_CHAR_INDEX = 1; +export const CHAR_DATA_WIDTH_INDEX = 2; +export const CHAR_DATA_CODE_INDEX = 3; + +/** + * Null cell - a real empty cell (containing nothing). + * Note that code should always be 0 for a null cell as + * several test condition of the buffer line rely on this. + */ +export const NULL_CELL_CHAR = ''; +export const NULL_CELL_WIDTH = 1; +export const NULL_CELL_CODE = 0; + +/** + * Whitespace cell. + * This is meant as a replacement for empty cells when needed + * during rendering lines to preserve correct aligment. + */ +export const WHITESPACE_CELL_CHAR = ' '; +export const WHITESPACE_CELL_WIDTH = 1; +export const WHITESPACE_CELL_CODE = 32; + +/** + * Bitmasks for accessing data in `content`. + */ +export const enum Content { + /** + * bit 1..21 codepoint, max allowed in UTF32 is 0x10FFFF (21 bits taken) + * read: `codepoint = content & Content.codepointMask;` + * write: `content |= codepoint & Content.codepointMask;` + * shortcut if precondition `codepoint <= 0x10FFFF` is met: + * `content |= codepoint;` + */ + CODEPOINT_MASK = 0x1FFFFF, + + /** + * bit 22 flag indication whether a cell contains combined content + * read: `isCombined = content & Content.isCombined;` + * set: `content |= Content.isCombined;` + * clear: `content &= ~Content.isCombined;` + */ + IS_COMBINED_MASK = 0x200000, // 1 << 21 + + /** + * bit 1..22 mask to check whether a cell contains any string data + * we need to check for codepoint and isCombined bits to see + * whether a cell contains anything + * read: `isEmpty = !(content & Content.hasContent)` + */ + HAS_CONTENT_MASK = 0x3FFFFF, + + /** + * bit 23..24 wcwidth value of cell, takes 2 bits (ranges from 0..2) + * read: `width = (content & Content.widthMask) >> Content.widthShift;` + * `hasWidth = content & Content.widthMask;` + * as long as wcwidth is highest value in `content`: + * `width = content >> Content.widthShift;` + * write: `content |= (width << Content.widthShift) & Content.widthMask;` + * shortcut if precondition `0 <= width <= 3` is met: + * `content |= width << Content.widthShift;` + */ + WIDTH_MASK = 0xC00000, // 3 << 22 + WIDTH_SHIFT = 22 +} + +export const enum Attributes { + /** + * bit 1..8 blue in RGB, color in P256 and P16 + */ + BLUE_MASK = 0xFF, + BLUE_SHIFT = 0, + PCOLOR_MASK = 0xFF, + PCOLOR_SHIFT = 0, + + /** + * bit 9..16 green in RGB + */ + GREEN_MASK = 0xFF00, + GREEN_SHIFT = 8, + + /** + * bit 17..24 red in RGB + */ + RED_MASK = 0xFF0000, + RED_SHIFT = 16, + + /** + * bit 25..26 color mode: DEFAULT (0) | P16 (1) | P256 (2) | RGB (3) + */ + CM_MASK = 0x3000000, + CM_DEFAULT = 0, + CM_P16 = 0x1000000, + CM_P256 = 0x2000000, + CM_RGB = 0x3000000, + + /** + * bit 1..24 RGB room + */ + RGB_MASK = 0xFFFFFF +} + +export const enum FgFlags { + /** + * bit 27..32 + */ + INVERSE = 0x4000000, + BOLD = 0x8000000, + UNDERLINE = 0x10000000, + BLINK = 0x20000000, + INVISIBLE = 0x40000000, + STRIKETHROUGH = 0x80000000, +} + +export const enum BgFlags { + /** + * bit 27..32 (upper 3 unused) + */ + ITALIC = 0x4000000, + DIM = 0x8000000, + HAS_EXTENDED = 0x10000000 +} + +export const enum UnderlineStyle { + NONE = 0, + SINGLE = 1, + DOUBLE = 2, + CURLY = 3, + DOTTED = 4, + DASHED = 5 +} |