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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,159 @@ | ||
| /*--------------------------------------------------------- | ||
| * Copyright (C) Microsoft Corporation. All rights reserved. | ||
| *--------------------------------------------------------*/ | ||
|
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| import { StandardTokenType } from "./main"; | ||
| import { FontStyle } from "./theme"; | ||
|
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| /** | ||
| * Helpers to manage the "collapsed" metadata of an entire StackElement stack. | ||
| * The following assumptions have been made: | ||
| * - languageId < 256 => needs 8 bits | ||
| * - unique color count < 512 => needs 9 bits | ||
| * | ||
| * The binary format is: | ||
| * - ------------------------------------------- | ||
| * 3322 2222 2222 1111 1111 1100 0000 0000 | ||
| * 1098 7654 3210 9876 5432 1098 7654 3210 | ||
| * - ------------------------------------------- | ||
| * xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx | ||
| * bbbb bbbb ffff ffff fFFF FBTT LLLL LLLL | ||
| * - ------------------------------------------- | ||
| * - L = LanguageId (8 bits) | ||
| * - T = StandardTokenType (2 bits) | ||
| * - B = Balanced bracket (1 bit) | ||
| * - F = FontStyle (4 bits) | ||
| * - f = foreground color (9 bits) | ||
| * - b = background color (9 bits) | ||
| */ | ||
| export const enum MetadataConsts { | ||
| LANGUAGEID_MASK = 0b00000000000000000000000011111111, | ||
| TOKEN_TYPE_MASK = 0b00000000000000000000001100000000, | ||
| BALANCED_BRACKETS_MASK = 0b00000000000000000000010000000000, | ||
| FONT_STYLE_MASK = 0b00000000000000000111100000000000, | ||
| FOREGROUND_MASK = 0b00000000111111111000000000000000, | ||
| BACKGROUND_MASK = 0b11111111000000000000000000000000, | ||
|
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| LANGUAGEID_OFFSET = 0, | ||
| TOKEN_TYPE_OFFSET = 8, | ||
| BALANCED_BRACKETS_OFFSET = 10, | ||
| FONT_STYLE_OFFSET = 11, | ||
| FOREGROUND_OFFSET = 15, | ||
| BACKGROUND_OFFSET = 24 | ||
| } | ||
|
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| export class StackElementMetadata { | ||
|
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| public static toBinaryStr(metadata: number): string { | ||
| let r = metadata.toString(2); | ||
| while (r.length < 32) { | ||
| r = '0' + r; | ||
| } | ||
| return r; | ||
| } | ||
|
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| public static printMetadata(metadata: number): void { | ||
| const languageId = StackElementMetadata.getLanguageId(metadata); | ||
| const tokenType = StackElementMetadata.getTokenType(metadata); | ||
| const fontStyle = StackElementMetadata.getFontStyle(metadata); | ||
| const foreground = StackElementMetadata.getForeground(metadata); | ||
| const background = StackElementMetadata.getBackground(metadata); | ||
|
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| console.log({ | ||
| languageId: languageId, | ||
| tokenType: tokenType, | ||
| fontStyle: fontStyle, | ||
| foreground: foreground, | ||
| background: background, | ||
| }); | ||
| } | ||
|
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| public static getLanguageId(metadata: number): number { | ||
| return (metadata & MetadataConsts.LANGUAGEID_MASK) >>> MetadataConsts.LANGUAGEID_OFFSET; | ||
| } | ||
|
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| public static getTokenType(metadata: number): StandardTokenType { | ||
| return (metadata & MetadataConsts.TOKEN_TYPE_MASK) >>> MetadataConsts.TOKEN_TYPE_OFFSET; | ||
| } | ||
|
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| public static containsBalancedBrackets(metadata: number): boolean { | ||
| return (metadata & MetadataConsts.BALANCED_BRACKETS_MASK) !== 0; | ||
| } | ||
|
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| public static getFontStyle(metadata: number): number { | ||
| return (metadata & MetadataConsts.FONT_STYLE_MASK) >>> MetadataConsts.FONT_STYLE_OFFSET; | ||
| } | ||
|
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| public static getForeground(metadata: number): number { | ||
| return (metadata & MetadataConsts.FOREGROUND_MASK) >>> MetadataConsts.FOREGROUND_OFFSET; | ||
| } | ||
|
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| public static getBackground(metadata: number): number { | ||
| return (metadata & MetadataConsts.BACKGROUND_MASK) >>> MetadataConsts.BACKGROUND_OFFSET; | ||
| } | ||
|
|
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| /** | ||
| * Updates the fields in `metadata`. | ||
| * A value of `0`, `NotSet` or `null` indicates that the corresponding field should be left as is. | ||
| */ | ||
| public static set(metadata: number, languageId: number, tokenType: OptionalStandardTokenType, containsBalancedBrackets: boolean | null, fontStyle: FontStyle, foreground: number, background: number): number { | ||
| let _languageId = StackElementMetadata.getLanguageId(metadata); | ||
| let _tokenType = StackElementMetadata.getTokenType(metadata); | ||
| let _containsBalancedBracketsBit: 0 | 1 = StackElementMetadata.containsBalancedBrackets(metadata) ? 1 : 0; | ||
| let _fontStyle = StackElementMetadata.getFontStyle(metadata); | ||
| let _foreground = StackElementMetadata.getForeground(metadata); | ||
| let _background = StackElementMetadata.getBackground(metadata); | ||
|
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| if (languageId !== 0) { | ||
| _languageId = languageId; | ||
| } | ||
| if (tokenType !== OptionalStandardTokenType.NotSet) { | ||
| _tokenType = fromOptionalTokenType(tokenType); | ||
| } | ||
| if (containsBalancedBrackets !== null) { | ||
| _containsBalancedBracketsBit = containsBalancedBrackets ? 1 : 0; | ||
| } | ||
| if (fontStyle !== FontStyle.NotSet) { | ||
| _fontStyle = fontStyle; | ||
| } | ||
| if (foreground !== 0) { | ||
| _foreground = foreground; | ||
| } | ||
| if (background !== 0) { | ||
| _background = background; | ||
| } | ||
|
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| return ( | ||
| (_languageId << MetadataConsts.LANGUAGEID_OFFSET) | ||
| | (_tokenType << MetadataConsts.TOKEN_TYPE_OFFSET) | ||
| | (_containsBalancedBracketsBit << MetadataConsts.BALANCED_BRACKETS_OFFSET) | ||
| | (_fontStyle << MetadataConsts.FONT_STYLE_OFFSET) | ||
| | (_foreground << MetadataConsts.FOREGROUND_OFFSET) | ||
| | (_background << MetadataConsts.BACKGROUND_OFFSET) | ||
| ) >>> 0; | ||
| } | ||
| } | ||
|
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| export function toOptionalTokenType(standardType: StandardTokenType): OptionalStandardTokenType { | ||
| return standardType as any as OptionalStandardTokenType; | ||
| } | ||
|
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| function fromOptionalTokenType( | ||
| standardType: | ||
| | OptionalStandardTokenType.Other | ||
| | OptionalStandardTokenType.Comment | ||
| | OptionalStandardTokenType.String | ||
| | OptionalStandardTokenType.RegEx | ||
| ): StandardTokenType { | ||
| return standardType as any as StandardTokenType; | ||
| } | ||
|
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| // Must have the same values as `StandardTokenType`! | ||
| export const enum OptionalStandardTokenType { | ||
| Other = 0, | ||
| Comment = 1, | ||
| String = 2, | ||
| RegEx = 3, | ||
| // Indicates that no token type is set. | ||
| NotSet = 8 | ||
| } |
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