549 lines
28 KiB
TypeScript
549 lines
28 KiB
TypeScript
/**
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* Copyright (c) 2021 The xterm.js authors. All rights reserved.
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* @license MIT
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*/
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import { throwIfFalsy } from 'browser/renderer/RendererUtils';
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interface IBlockVector {
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x: number;
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y: number;
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w: number;
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h: number;
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}
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export const blockElementDefinitions: { [index: string]: IBlockVector[] | undefined } = {
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'▀': [{ x: 0, y: 0, w: 8, h: 4 }],
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'█': [{ x: 0, y: 0, w: 8, h: 8 }],
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'▇': [{ x: 0, y: 1, w: 8, h: 7 }],
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'▆': [{ x: 0, y: 2, w: 8, h: 6 }],
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'▅': [{ x: 0, y: 3, w: 8, h: 5 }],
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'▄': [{ x: 0, y: 4, w: 8, h: 4 }],
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'▃': [{ x: 0, y: 5, w: 8, h: 3 }],
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'▂': [{ x: 0, y: 6, w: 8, h: 2 }],
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'▁': [{ x: 0, y: 7, w: 8, h: 1 }],
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'▉': [{ x: 0, y: 0, w: 7, h: 8 }],
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'▊': [{ x: 0, y: 0, w: 6, h: 8 }],
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'▋': [{ x: 0, y: 0, w: 5, h: 8 }],
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'▌': [{ x: 0, y: 0, w: 4, h: 8 }],
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'▍': [{ x: 0, y: 0, w: 3, h: 8 }],
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'▎': [{ x: 0, y: 0, w: 2, h: 8 }],
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'▏': [{ x: 0, y: 0, w: 1, h: 8 }],
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// VERTICAL ONE EIGHTH BLOCK-2 through VERTICAL ONE EIGHTH BLOCK-7
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'\u{1FB70}': [{ x: 1, y: 0, w: 1, h: 8 }],
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'\u{1FB71}': [{ x: 2, y: 0, w: 1, h: 8 }],
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'\u{1FB72}': [{ x: 3, y: 0, w: 1, h: 8 }],
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'\u{1FB73}': [{ x: 4, y: 0, w: 1, h: 8 }],
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'\u{1FB74}': [{ x: 5, y: 0, w: 1, h: 8 }],
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'\u{1FB75}': [{ x: 6, y: 0, w: 1, h: 8 }],
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// RIGHT ONE EIGHTH BLOCK
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'▕': [{ x: 7, y: 0, w: 1, h: 8 }],
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// UPPER ONE EIGHTH BLOCK
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'▔': [{ x: 0, y: 0, w: 8, h: 1 }],
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// HORIZONTAL ONE EIGHTH BLOCK-2 through HORIZONTAL ONE EIGHTH BLOCK-7
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'\u{1FB76}': [{ x: 0, y: 1, w: 8, h: 1 }],
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'\u{1FB77}': [{ x: 0, y: 2, w: 8, h: 1 }],
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'\u{1FB78}': [{ x: 0, y: 3, w: 8, h: 1 }],
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'\u{1FB79}': [{ x: 0, y: 4, w: 8, h: 1 }],
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'\u{1FB7A}': [{ x: 0, y: 5, w: 8, h: 1 }],
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'\u{1FB7B}': [{ x: 0, y: 6, w: 8, h: 1 }],
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// LEFT AND LOWER ONE EIGHTH BLOCK
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'\u{1FB7C}': [{ x: 0, y: 0, w: 1, h: 8 }, { x: 0, y: 7, w: 8, h: 1 }],
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// LEFT AND UPPER ONE EIGHTH BLOCK
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'\u{1FB7D}': [{ x: 0, y: 0, w: 1, h: 8 }, { x: 0, y: 0, w: 8, h: 1 }],
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// RIGHT AND UPPER ONE EIGHTH BLOCK
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'\u{1FB7E}': [{ x: 7, y: 0, w: 1, h: 8 }, { x: 0, y: 0, w: 8, h: 1 }],
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// RIGHT AND LOWER ONE EIGHTH BLOCK
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'\u{1FB7F}': [{ x: 7, y: 0, w: 1, h: 8 }, { x: 0, y: 7, w: 8, h: 1 }],
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// UPPER AND LOWER ONE EIGHTH BLOCK
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'\u{1FB80}': [{ x: 0, y: 0, w: 8, h: 1 }, { x: 0, y: 7, w: 8, h: 1 }],
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// HORIZONTAL ONE EIGHTH BLOCK-1358
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'\u{1FB81}': [{ x: 0, y: 0, w: 8, h: 1 }, { x: 0, y: 2, w: 8, h: 1 }, { x: 0, y: 4, w: 8, h: 1 }, { x: 0, y: 7, w: 8, h: 1 }],
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// UPPER ONE QUARTER BLOCK
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'\u{1FB82}': [{ x: 0, y: 0, w: 8, h: 2 }],
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// UPPER THREE EIGHTHS BLOCK
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'\u{1FB83}': [{ x: 0, y: 0, w: 8, h: 3 }],
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// UPPER FIVE EIGHTHS BLOCK
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'\u{1FB84}': [{ x: 0, y: 0, w: 8, h: 5 }],
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// UPPER THREE QUARTERS BLOCK
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'\u{1FB85}': [{ x: 0, y: 0, w: 8, h: 6 }],
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// UPPER SEVEN EIGHTHS BLOCK
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'\u{1FB86}': [{ x: 0, y: 0, w: 8, h: 7 }],
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// RIGHT ONE QUARTER BLOCK
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'\u{1FB87}': [{ x: 6, y: 0, w: 2, h: 8 }],
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// RIGHT THREE EIGHTHS B0OCK
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'\u{1FB88}': [{ x: 5, y: 0, w: 3, h: 8 }],
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// RIGHT FIVE EIGHTHS BL0CK
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'\u{1FB89}': [{ x: 3, y: 0, w: 5, h: 8 }],
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// RIGHT THREE QUARTERS 0LOCK
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'\u{1FB8A}': [{ x: 2, y: 0, w: 6, h: 8 }],
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// RIGHT SEVEN EIGHTHS B0OCK
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'\u{1FB8B}': [{ x: 1, y: 0, w: 7, h: 8 }],
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// CHECKER BOARD FILL
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'\u{1FB95}': [
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{ x: 0, y: 0, w: 2, h: 2 }, { x: 4, y: 0, w: 2, h: 2 },
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{ x: 2, y: 2, w: 2, h: 2 }, { x: 6, y: 2, w: 2, h: 2 },
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{ x: 0, y: 4, w: 2, h: 2 }, { x: 4, y: 4, w: 2, h: 2 },
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{ x: 2, y: 6, w: 2, h: 2 }, { x: 6, y: 6, w: 2, h: 2 }
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],
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// INVERSE CHECKER BOARD FILL
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'\u{1FB96}': [
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{ x: 2, y: 0, w: 2, h: 2 }, { x: 6, y: 0, w: 2, h: 2 },
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{ x: 0, y: 2, w: 2, h: 2 }, { x: 4, y: 2, w: 2, h: 2 },
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{ x: 2, y: 4, w: 2, h: 2 }, { x: 6, y: 4, w: 2, h: 2 },
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{ x: 0, y: 6, w: 2, h: 2 }, { x: 4, y: 6, w: 2, h: 2 }
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],
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// HEAVY HORIZONTAL FILL (upper middle and lower one quarter block)
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'\u{1FB97}': [{ x: 0, y: 2, w: 8, h: 2 }, { x: 0, y: 6, w: 8, h: 2 }]
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};
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type PatternDefinition = number[][];
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/**
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* Defines the repeating pattern used by special characters, the pattern is made up of a 2d array of
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* pixel values to be filled (1) or not filled (0).
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*/
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const patternCharacterDefinitions: { [key: string]: PatternDefinition | undefined } = {
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'░': [
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[1, 0, 0, 0],
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[0, 0, 0, 0],
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[0, 0, 1, 0],
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[0, 0, 0, 0]
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],
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'▒': [
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[1, 0],
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[0, 0],
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[0, 1],
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[0, 0]
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],
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'▓': [
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[0, 1],
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[1, 1],
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[1, 0],
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[1, 1]
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]
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};
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const enum Shapes {
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/** │ */ TOP_TO_BOTTOM = 'M.5,0 L.5,1',
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/** ─ */ LEFT_TO_RIGHT = 'M0,.5 L1,.5',
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/** └ */ TOP_TO_RIGHT = 'M.5,0 L.5,.5 L1,.5',
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/** ┘ */ TOP_TO_LEFT = 'M.5,0 L.5,.5 L0,.5',
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/** ┐ */ LEFT_TO_BOTTOM = 'M0,.5 L.5,.5 L.5,1',
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/** ┌ */ RIGHT_TO_BOTTOM = 'M0.5,1 L.5,.5 L1,.5',
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/** ╵ */ MIDDLE_TO_TOP = 'M.5,.5 L.5,0',
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/** ╴ */ MIDDLE_TO_LEFT = 'M.5,.5 L0,.5',
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/** ╶ */ MIDDLE_TO_RIGHT = 'M.5,.5 L1,.5',
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/** ╷ */ MIDDLE_TO_BOTTOM = 'M.5,.5 L.5,1',
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/** ┴ */ T_TOP = 'M0,.5 L1,.5 M.5,.5 L.5,0',
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/** ┤ */ T_LEFT = 'M.5,0 L.5,1 M.5,.5 L0,.5',
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/** ├ */ T_RIGHT = 'M.5,0 L.5,1 M.5,.5 L1,.5',
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/** ┬ */ T_BOTTOM = 'M0,.5 L1,.5 M.5,.5 L.5,1',
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/** ┼ */ CROSS = 'M0,.5 L1,.5 M.5,0 L.5,1',
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/** ╌ */ TWO_DASHES_HORIZONTAL = 'M.1,.5 L.4,.5 M.6,.5 L.9,.5', // .2 empty, .3 filled
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/** ┄ */ THREE_DASHES_HORIZONTAL = 'M.0667,.5 L.2667,.5 M.4,.5 L.6,.5 M.7333,.5 L.9333,.5', // .1333 empty, .2 filled
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/** ┉ */ FOUR_DASHES_HORIZONTAL = 'M.05,.5 L.2,.5 M.3,.5 L.45,.5 M.55,.5 L.7,.5 M.8,.5 L.95,.5', // .1 empty, .15 filled
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/** ╎ */ TWO_DASHES_VERTICAL = 'M.5,.1 L.5,.4 M.5,.6 L.5,.9',
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/** ┆ */ THREE_DASHES_VERTICAL = 'M.5,.0667 L.5,.2667 M.5,.4 L.5,.6 M.5,.7333 L.5,.9333',
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/** ┊ */ FOUR_DASHES_VERTICAL = 'M.5,.05 L.5,.2 M.5,.3 L.5,.45 L.5,.55 M.5,.7 L.5,.95',
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}
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const enum Style {
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NORMAL = 1,
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BOLD = 3
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}
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/**
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* This contains the definitions of all box drawing characters in the format of SVG paths (ie. the
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* svg d attribute).
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*/
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export const boxDrawingDefinitions: { [character: string]: { [fontWeight: number]: string | ((xp: number, yp: number) => string) } | undefined } = {
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// Uniform normal and bold
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'─': { [Style.NORMAL]: Shapes.LEFT_TO_RIGHT },
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'━': { [Style.BOLD]: Shapes.LEFT_TO_RIGHT },
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'│': { [Style.NORMAL]: Shapes.TOP_TO_BOTTOM },
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'┃': { [Style.BOLD]: Shapes.TOP_TO_BOTTOM },
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'┌': { [Style.NORMAL]: Shapes.RIGHT_TO_BOTTOM },
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'┏': { [Style.BOLD]: Shapes.RIGHT_TO_BOTTOM },
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'┐': { [Style.NORMAL]: Shapes.LEFT_TO_BOTTOM },
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'┓': { [Style.BOLD]: Shapes.LEFT_TO_BOTTOM },
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'└': { [Style.NORMAL]: Shapes.TOP_TO_RIGHT },
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'┗': { [Style.BOLD]: Shapes.TOP_TO_RIGHT },
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'┘': { [Style.NORMAL]: Shapes.TOP_TO_LEFT },
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'┛': { [Style.BOLD]: Shapes.TOP_TO_LEFT },
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'├': { [Style.NORMAL]: Shapes.T_RIGHT },
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'┣': { [Style.BOLD]: Shapes.T_RIGHT },
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'┤': { [Style.NORMAL]: Shapes.T_LEFT },
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'┫': { [Style.BOLD]: Shapes.T_LEFT },
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'┬': { [Style.NORMAL]: Shapes.T_BOTTOM },
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'┳': { [Style.BOLD]: Shapes.T_BOTTOM },
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'┴': { [Style.NORMAL]: Shapes.T_TOP },
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'┻': { [Style.BOLD]: Shapes.T_TOP },
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'┼': { [Style.NORMAL]: Shapes.CROSS },
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'╋': { [Style.BOLD]: Shapes.CROSS },
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'╴': { [Style.NORMAL]: Shapes.MIDDLE_TO_LEFT },
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'╸': { [Style.BOLD]: Shapes.MIDDLE_TO_LEFT },
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'╵': { [Style.NORMAL]: Shapes.MIDDLE_TO_TOP },
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'╹': { [Style.BOLD]: Shapes.MIDDLE_TO_TOP },
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'╶': { [Style.NORMAL]: Shapes.MIDDLE_TO_RIGHT },
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'╺': { [Style.BOLD]: Shapes.MIDDLE_TO_RIGHT },
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'╷': { [Style.NORMAL]: Shapes.MIDDLE_TO_BOTTOM },
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'╻': { [Style.BOLD]: Shapes.MIDDLE_TO_BOTTOM },
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// Double border
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'═': { [Style.NORMAL]: (xp, yp) => `M0,${.5 - yp} L1,${.5 - yp} M0,${.5 + yp} L1,${.5 + yp}` },
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'║': { [Style.NORMAL]: (xp, yp) => `M${.5 - xp},0 L${.5 - xp},1 M${.5 + xp},0 L${.5 + xp},1` },
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'╒': { [Style.NORMAL]: (xp, yp) => `M.5,1 L.5,${.5 - yp} L1,${.5 - yp} M.5,${.5 + yp} L1,${.5 + yp}` },
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'╓': { [Style.NORMAL]: (xp, yp) => `M${.5 - xp},1 L${.5 - xp},.5 L1,.5 M${.5 + xp},.5 L${.5 + xp},1` },
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'╔': { [Style.NORMAL]: (xp, yp) => `M1,${.5 - yp} L${.5 - xp},${.5 - yp} L${.5 - xp},1 M1,${.5 + yp} L${.5 + xp},${.5 + yp} L${.5 + xp},1` },
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'╕': { [Style.NORMAL]: (xp, yp) => `M0,${.5 - yp} L.5,${.5 - yp} L.5,1 M0,${.5 + yp} L.5,${.5 + yp}` },
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'╖': { [Style.NORMAL]: (xp, yp) => `M${.5 + xp},1 L${.5 + xp},.5 L0,.5 M${.5 - xp},.5 L${.5 - xp},1` },
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'╗': { [Style.NORMAL]: (xp, yp) => `M0,${.5 + yp} L${.5 - xp},${.5 + yp} L${.5 - xp},1 M0,${.5 - yp} L${.5 + xp},${.5 - yp} L${.5 + xp},1` },
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'╘': { [Style.NORMAL]: (xp, yp) => `M.5,0 L.5,${.5 + yp} L1,${.5 + yp} M.5,${.5 - yp} L1,${.5 - yp}` },
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'╙': { [Style.NORMAL]: (xp, yp) => `M1,.5 L${.5 - xp},.5 L${.5 - xp},0 M${.5 + xp},.5 L${.5 + xp},0` },
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'╚': { [Style.NORMAL]: (xp, yp) => `M1,${.5 - yp} L${.5 + xp},${.5 - yp} L${.5 + xp},0 M1,${.5 + yp} L${.5 - xp},${.5 + yp} L${.5 - xp},0` },
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'╛': { [Style.NORMAL]: (xp, yp) => `M0,${.5 + yp} L.5,${.5 + yp} L.5,0 M0,${.5 - yp} L.5,${.5 - yp}` },
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'╜': { [Style.NORMAL]: (xp, yp) => `M0,.5 L${.5 + xp},.5 L${.5 + xp},0 M${.5 - xp},.5 L${.5 - xp},0` },
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'╝': { [Style.NORMAL]: (xp, yp) => `M0,${.5 - yp} L${.5 - xp},${.5 - yp} L${.5 - xp},0 M0,${.5 + yp} L${.5 + xp},${.5 + yp} L${.5 + xp},0` },
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'╞': { [Style.NORMAL]: (xp, yp) => `${Shapes.TOP_TO_BOTTOM} M.5,${.5 - yp} L1,${.5 - yp} M.5,${.5 + yp} L1,${.5 + yp}` },
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'╟': { [Style.NORMAL]: (xp, yp) => `M${.5 - xp},0 L${.5 - xp},1 M${.5 + xp},0 L${.5 + xp},1 M${.5 + xp},.5 L1,.5` },
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'╠': { [Style.NORMAL]: (xp, yp) => `M${.5 - xp},0 L${.5 - xp},1 M1,${.5 + yp} L${.5 + xp},${.5 + yp} L${.5 + xp},1 M1,${.5 - yp} L${.5 + xp},${.5 - yp} L${.5 + xp},0` },
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'╡': { [Style.NORMAL]: (xp, yp) => `${Shapes.TOP_TO_BOTTOM} M0,${.5 - yp} L.5,${.5 - yp} M0,${.5 + yp} L.5,${.5 + yp}` },
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'╢': { [Style.NORMAL]: (xp, yp) => `M0,.5 L${.5 - xp},.5 M${.5 - xp},0 L${.5 - xp},1 M${.5 + xp},0 L${.5 + xp},1` },
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'╣': { [Style.NORMAL]: (xp, yp) => `M${.5 + xp},0 L${.5 + xp},1 M0,${.5 + yp} L${.5 - xp},${.5 + yp} L${.5 - xp},1 M0,${.5 - yp} L${.5 - xp},${.5 - yp} L${.5 - xp},0` },
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'╤': { [Style.NORMAL]: (xp, yp) => `M0,${.5 - yp} L1,${.5 - yp} M0,${.5 + yp} L1,${.5 + yp} M.5,${.5 + yp} L.5,1` },
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'╥': { [Style.NORMAL]: (xp, yp) => `${Shapes.LEFT_TO_RIGHT} M${.5 - xp},.5 L${.5 - xp},1 M${.5 + xp},.5 L${.5 + xp},1` },
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'╦': { [Style.NORMAL]: (xp, yp) => `M0,${.5 - yp} L1,${.5 - yp} M0,${.5 + yp} L${.5 - xp},${.5 + yp} L${.5 - xp},1 M1,${.5 + yp} L${.5 + xp},${.5 + yp} L${.5 + xp},1` },
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'╧': { [Style.NORMAL]: (xp, yp) => `M.5,0 L.5,${.5 - yp} M0,${.5 - yp} L1,${.5 - yp} M0,${.5 + yp} L1,${.5 + yp}` },
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'╨': { [Style.NORMAL]: (xp, yp) => `${Shapes.LEFT_TO_RIGHT} M${.5 - xp},.5 L${.5 - xp},0 M${.5 + xp},.5 L${.5 + xp},0` },
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'╩': { [Style.NORMAL]: (xp, yp) => `M0,${.5 + yp} L1,${.5 + yp} M0,${.5 - yp} L${.5 - xp},${.5 - yp} L${.5 - xp},0 M1,${.5 - yp} L${.5 + xp},${.5 - yp} L${.5 + xp},0` },
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'╪': { [Style.NORMAL]: (xp, yp) => `${Shapes.TOP_TO_BOTTOM} M0,${.5 - yp} L1,${.5 - yp} M0,${.5 + yp} L1,${.5 + yp}` },
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'╫': { [Style.NORMAL]: (xp, yp) => `${Shapes.LEFT_TO_RIGHT} M${.5 - xp},0 L${.5 - xp},1 M${.5 + xp},0 L${.5 + xp},1` },
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'╬': { [Style.NORMAL]: (xp, yp) => `M0,${.5 + yp} L${.5 - xp},${.5 + yp} L${.5 - xp},1 M1,${.5 + yp} L${.5 + xp},${.5 + yp} L${.5 + xp},1 M0,${.5 - yp} L${.5 - xp},${.5 - yp} L${.5 - xp},0 M1,${.5 - yp} L${.5 + xp},${.5 - yp} L${.5 + xp},0` },
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// Diagonal
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'╱': { [Style.NORMAL]: 'M1,0 L0,1' },
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'╲': { [Style.NORMAL]: 'M0,0 L1,1' },
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'╳': { [Style.NORMAL]: 'M1,0 L0,1 M0,0 L1,1' },
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// Mixed weight
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'╼': { [Style.NORMAL]: Shapes.MIDDLE_TO_LEFT, [Style.BOLD]: Shapes.MIDDLE_TO_RIGHT },
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'╽': { [Style.NORMAL]: Shapes.MIDDLE_TO_TOP, [Style.BOLD]: Shapes.MIDDLE_TO_BOTTOM },
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'╾': { [Style.NORMAL]: Shapes.MIDDLE_TO_RIGHT, [Style.BOLD]: Shapes.MIDDLE_TO_LEFT },
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'╿': { [Style.NORMAL]: Shapes.MIDDLE_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_TOP },
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'┍': { [Style.NORMAL]: Shapes.MIDDLE_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_RIGHT },
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'┎': { [Style.NORMAL]: Shapes.MIDDLE_TO_RIGHT, [Style.BOLD]: Shapes.MIDDLE_TO_BOTTOM },
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'┑': { [Style.NORMAL]: Shapes.MIDDLE_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_LEFT },
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'┒': { [Style.NORMAL]: Shapes.MIDDLE_TO_LEFT, [Style.BOLD]: Shapes.MIDDLE_TO_BOTTOM },
|
||
'┕': { [Style.NORMAL]: Shapes.MIDDLE_TO_TOP, [Style.BOLD]: Shapes.MIDDLE_TO_RIGHT },
|
||
'┖': { [Style.NORMAL]: Shapes.MIDDLE_TO_RIGHT, [Style.BOLD]: Shapes.MIDDLE_TO_TOP },
|
||
'┙': { [Style.NORMAL]: Shapes.MIDDLE_TO_TOP, [Style.BOLD]: Shapes.MIDDLE_TO_LEFT },
|
||
'┚': { [Style.NORMAL]: Shapes.MIDDLE_TO_LEFT, [Style.BOLD]: Shapes.MIDDLE_TO_TOP },
|
||
'┝': { [Style.NORMAL]: Shapes.TOP_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_RIGHT },
|
||
'┞': { [Style.NORMAL]: Shapes.RIGHT_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_TOP },
|
||
'┟': { [Style.NORMAL]: Shapes.TOP_TO_RIGHT, [Style.BOLD]: Shapes.MIDDLE_TO_BOTTOM },
|
||
'┠': { [Style.NORMAL]: Shapes.MIDDLE_TO_RIGHT, [Style.BOLD]: Shapes.TOP_TO_BOTTOM },
|
||
'┡': { [Style.NORMAL]: Shapes.MIDDLE_TO_BOTTOM, [Style.BOLD]: Shapes.TOP_TO_RIGHT },
|
||
'┢': { [Style.NORMAL]: Shapes.MIDDLE_TO_TOP, [Style.BOLD]: Shapes.RIGHT_TO_BOTTOM },
|
||
'┥': { [Style.NORMAL]: Shapes.TOP_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_LEFT },
|
||
'┦': { [Style.NORMAL]: Shapes.LEFT_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_TOP },
|
||
'┧': { [Style.NORMAL]: Shapes.TOP_TO_LEFT, [Style.BOLD]: Shapes.MIDDLE_TO_BOTTOM },
|
||
'┨': { [Style.NORMAL]: Shapes.MIDDLE_TO_LEFT, [Style.BOLD]: Shapes.TOP_TO_BOTTOM },
|
||
'┩': { [Style.NORMAL]: Shapes.MIDDLE_TO_BOTTOM, [Style.BOLD]: Shapes.TOP_TO_LEFT },
|
||
'┪': { [Style.NORMAL]: Shapes.MIDDLE_TO_TOP, [Style.BOLD]: Shapes.LEFT_TO_BOTTOM },
|
||
'┭': { [Style.NORMAL]: Shapes.RIGHT_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_LEFT },
|
||
'┮': { [Style.NORMAL]: Shapes.LEFT_TO_BOTTOM, [Style.BOLD]: Shapes.MIDDLE_TO_RIGHT },
|
||
'┯': { [Style.NORMAL]: Shapes.MIDDLE_TO_BOTTOM, [Style.BOLD]: Shapes.LEFT_TO_RIGHT },
|
||
'┰': { [Style.NORMAL]: Shapes.LEFT_TO_RIGHT, [Style.BOLD]: Shapes.MIDDLE_TO_BOTTOM },
|
||
'┱': { [Style.NORMAL]: Shapes.MIDDLE_TO_RIGHT, [Style.BOLD]: Shapes.LEFT_TO_BOTTOM },
|
||
'┲': { [Style.NORMAL]: Shapes.MIDDLE_TO_LEFT, [Style.BOLD]: Shapes.RIGHT_TO_BOTTOM },
|
||
'┵': { [Style.NORMAL]: Shapes.TOP_TO_RIGHT, [Style.BOLD]: Shapes.MIDDLE_TO_LEFT },
|
||
'┶': { [Style.NORMAL]: Shapes.TOP_TO_LEFT, [Style.BOLD]: Shapes.MIDDLE_TO_RIGHT },
|
||
'┷': { [Style.NORMAL]: Shapes.MIDDLE_TO_TOP, [Style.BOLD]: Shapes.LEFT_TO_RIGHT },
|
||
'┸': { [Style.NORMAL]: Shapes.LEFT_TO_RIGHT, [Style.BOLD]: Shapes.MIDDLE_TO_TOP },
|
||
'┹': { [Style.NORMAL]: Shapes.MIDDLE_TO_RIGHT, [Style.BOLD]: Shapes.TOP_TO_LEFT },
|
||
'┺': { [Style.NORMAL]: Shapes.MIDDLE_TO_LEFT, [Style.BOLD]: Shapes.TOP_TO_RIGHT },
|
||
'┽': { [Style.NORMAL]: `${Shapes.TOP_TO_BOTTOM} ${Shapes.MIDDLE_TO_RIGHT}`, [Style.BOLD]: Shapes.MIDDLE_TO_LEFT },
|
||
'┾': { [Style.NORMAL]: `${Shapes.TOP_TO_BOTTOM} ${Shapes.MIDDLE_TO_LEFT}`, [Style.BOLD]: Shapes.MIDDLE_TO_RIGHT },
|
||
'┿': { [Style.NORMAL]: Shapes.TOP_TO_BOTTOM, [Style.BOLD]: Shapes.LEFT_TO_RIGHT },
|
||
'╀': { [Style.NORMAL]: `${Shapes.LEFT_TO_RIGHT} ${Shapes.MIDDLE_TO_BOTTOM}`, [Style.BOLD]: Shapes.MIDDLE_TO_TOP },
|
||
'╁': { [Style.NORMAL]: `${Shapes.MIDDLE_TO_TOP} ${Shapes.LEFT_TO_RIGHT}`, [Style.BOLD]: Shapes.MIDDLE_TO_BOTTOM },
|
||
'╂': { [Style.NORMAL]: Shapes.LEFT_TO_RIGHT, [Style.BOLD]: Shapes.TOP_TO_BOTTOM },
|
||
'╃': { [Style.NORMAL]: Shapes.RIGHT_TO_BOTTOM, [Style.BOLD]: Shapes.TOP_TO_LEFT },
|
||
'╄': { [Style.NORMAL]: Shapes.LEFT_TO_BOTTOM, [Style.BOLD]: Shapes.TOP_TO_RIGHT },
|
||
'╅': { [Style.NORMAL]: Shapes.TOP_TO_RIGHT, [Style.BOLD]: Shapes.LEFT_TO_BOTTOM },
|
||
'╆': { [Style.NORMAL]: Shapes.TOP_TO_LEFT, [Style.BOLD]: Shapes.RIGHT_TO_BOTTOM },
|
||
'╇': { [Style.NORMAL]: Shapes.MIDDLE_TO_BOTTOM, [Style.BOLD]: `${Shapes.MIDDLE_TO_TOP} ${Shapes.LEFT_TO_RIGHT}` },
|
||
'╈': { [Style.NORMAL]: Shapes.MIDDLE_TO_TOP, [Style.BOLD]: `${Shapes.LEFT_TO_RIGHT} ${Shapes.MIDDLE_TO_BOTTOM}` },
|
||
'╉': { [Style.NORMAL]: Shapes.MIDDLE_TO_RIGHT, [Style.BOLD]: `${Shapes.TOP_TO_BOTTOM} ${Shapes.MIDDLE_TO_LEFT}` },
|
||
'╊': { [Style.NORMAL]: Shapes.MIDDLE_TO_LEFT, [Style.BOLD]: `${Shapes.TOP_TO_BOTTOM} ${Shapes.MIDDLE_TO_RIGHT}` },
|
||
|
||
// Dashed
|
||
'╌': { [Style.NORMAL]: Shapes.TWO_DASHES_HORIZONTAL },
|
||
'╍': { [Style.BOLD]: Shapes.TWO_DASHES_HORIZONTAL },
|
||
'┄': { [Style.NORMAL]: Shapes.THREE_DASHES_HORIZONTAL },
|
||
'┅': { [Style.BOLD]: Shapes.THREE_DASHES_HORIZONTAL },
|
||
'┈': { [Style.NORMAL]: Shapes.FOUR_DASHES_HORIZONTAL },
|
||
'┉': { [Style.BOLD]: Shapes.FOUR_DASHES_HORIZONTAL },
|
||
'╎': { [Style.NORMAL]: Shapes.TWO_DASHES_VERTICAL },
|
||
'╏': { [Style.BOLD]: Shapes.TWO_DASHES_VERTICAL },
|
||
'┆': { [Style.NORMAL]: Shapes.THREE_DASHES_VERTICAL },
|
||
'┇': { [Style.BOLD]: Shapes.THREE_DASHES_VERTICAL },
|
||
'┊': { [Style.NORMAL]: Shapes.FOUR_DASHES_VERTICAL },
|
||
'┋': { [Style.BOLD]: Shapes.FOUR_DASHES_VERTICAL },
|
||
|
||
// Curved
|
||
'╭': { [Style.NORMAL]: 'C.5,1,.5,.5,1,.5' },
|
||
'╮': { [Style.NORMAL]: 'C.5,1,.5,.5,0,.5' },
|
||
'╯': { [Style.NORMAL]: 'C.5,0,.5,.5,0,.5' },
|
||
'╰': { [Style.NORMAL]: 'C.5,0,.5,.5,1,.5' }
|
||
};
|
||
|
||
/**
|
||
* Try drawing a custom block element or box drawing character, returning whether it was
|
||
* successfully drawn.
|
||
*/
|
||
export function tryDrawCustomChar(
|
||
ctx: CanvasRenderingContext2D,
|
||
c: string,
|
||
xOffset: number,
|
||
yOffset: number,
|
||
scaledCellWidth: number,
|
||
scaledCellHeight: number
|
||
): boolean {
|
||
const blockElementDefinition = blockElementDefinitions[c];
|
||
if (blockElementDefinition) {
|
||
drawBlockElementChar(ctx, blockElementDefinition, xOffset, yOffset, scaledCellWidth, scaledCellHeight);
|
||
return true;
|
||
}
|
||
|
||
const patternDefinition = patternCharacterDefinitions[c];
|
||
if (patternDefinition) {
|
||
drawPatternChar(ctx, patternDefinition, xOffset, yOffset, scaledCellWidth, scaledCellHeight);
|
||
return true;
|
||
}
|
||
|
||
const boxDrawingDefinition = boxDrawingDefinitions[c];
|
||
if (boxDrawingDefinition) {
|
||
drawBoxDrawingChar(ctx, boxDrawingDefinition, xOffset, yOffset, scaledCellWidth, scaledCellHeight);
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
function drawBlockElementChar(
|
||
ctx: CanvasRenderingContext2D,
|
||
charDefinition: IBlockVector[],
|
||
xOffset: number,
|
||
yOffset: number,
|
||
scaledCellWidth: number,
|
||
scaledCellHeight: number
|
||
): void {
|
||
for (let i = 0; i < charDefinition.length; i++) {
|
||
const box = charDefinition[i];
|
||
const xEighth = scaledCellWidth / 8;
|
||
const yEighth = scaledCellHeight / 8;
|
||
ctx.fillRect(
|
||
xOffset + box.x * xEighth,
|
||
yOffset + box.y * yEighth,
|
||
box.w * xEighth,
|
||
box.h * yEighth
|
||
);
|
||
}
|
||
}
|
||
|
||
const cachedPatterns: Map<PatternDefinition, Map</* fillStyle */string, CanvasPattern>> = new Map();
|
||
|
||
function drawPatternChar(
|
||
ctx: CanvasRenderingContext2D,
|
||
charDefinition: number[][],
|
||
xOffset: number,
|
||
yOffset: number,
|
||
scaledCellWidth: number,
|
||
scaledCellHeight: number
|
||
): void {
|
||
let patternSet = cachedPatterns.get(charDefinition);
|
||
if (!patternSet) {
|
||
patternSet = new Map();
|
||
cachedPatterns.set(charDefinition, patternSet);
|
||
}
|
||
const fillStyle = ctx.fillStyle;
|
||
if (typeof fillStyle !== 'string') {
|
||
throw new Error(`Unexpected fillStyle type "${fillStyle}"`);
|
||
}
|
||
let pattern = patternSet.get(fillStyle);
|
||
if (!pattern) {
|
||
const width = charDefinition[0].length;
|
||
const height = charDefinition.length;
|
||
const tmpCanvas = document.createElement('canvas');
|
||
tmpCanvas.width = width;
|
||
tmpCanvas.height = height;
|
||
const tmpCtx = throwIfFalsy(tmpCanvas.getContext('2d'));
|
||
const imageData = new ImageData(width, height);
|
||
|
||
// Extract rgba from fillStyle
|
||
let r: number;
|
||
let g: number;
|
||
let b: number;
|
||
let a: number;
|
||
if (fillStyle.startsWith('#')) {
|
||
r = parseInt(fillStyle.substr(1, 2), 16);
|
||
g = parseInt(fillStyle.substr(3, 2), 16);
|
||
b = parseInt(fillStyle.substr(5, 2), 16);
|
||
a = fillStyle.length > 7 && parseInt(fillStyle.substr(7, 2), 16) || 1;
|
||
} else if (fillStyle.startsWith('rgba')) {
|
||
([r, g, b, a] = fillStyle.substring(5, fillStyle.length - 1).split(',').map(e => parseFloat(e)));
|
||
} else {
|
||
throw new Error(`Unexpected fillStyle color format "${fillStyle}" when drawing pattern glyph`);
|
||
}
|
||
|
||
for (let y = 0; y < height; y++) {
|
||
for (let x = 0; x < width; x++) {
|
||
imageData.data[(y * width + x) * 4 ] = r;
|
||
imageData.data[(y * width + x) * 4 + 1] = g;
|
||
imageData.data[(y * width + x) * 4 + 2] = b;
|
||
imageData.data[(y * width + x) * 4 + 3] = charDefinition[y][x] * (a * 255);
|
||
}
|
||
}
|
||
tmpCtx.putImageData(imageData, 0, 0);
|
||
pattern = throwIfFalsy(ctx.createPattern(tmpCanvas, null));
|
||
patternSet.set(fillStyle, pattern);
|
||
}
|
||
ctx.fillStyle = pattern;
|
||
ctx.fillRect(xOffset, yOffset, scaledCellWidth, scaledCellHeight);
|
||
}
|
||
|
||
/**
|
||
* Draws the following box drawing characters by mapping a subset of SVG d attribute instructions to
|
||
* canvas draw calls.
|
||
*
|
||
* Box styles: ┎┰┒┍┯┑╓╥╖╒╤╕ ┏┳┓┌┲┓┌┬┐┏┱┐
|
||
* ┌─┬─┐ ┏━┳━┓ ╔═╦═╗ ┠╂┨┝┿┥╟╫╢╞╪╡ ┡╇┩├╊┫┢╈┪┣╉┤
|
||
* │ │ │ ┃ ┃ ┃ ║ ║ ║ ┖┸┚┕┷┙╙╨╜╘╧╛ └┴┘└┺┛┗┻┛┗┹┘
|
||
* ├─┼─┤ ┣━╋━┫ ╠═╬═╣ ┏┱┐┌┲┓┌┬┐┌┬┐ ┏┳┓┌┮┓┌┬┐┏┭┐
|
||
* │ │ │ ┃ ┃ ┃ ║ ║ ║ ┡╃┤├╄┩├╆┪┢╅┤ ┞╀┦├┾┫┟╁┧┣┽┤
|
||
* └─┴─┘ ┗━┻━┛ ╚═╩═╝ └┴┘└┴┘└┺┛┗┹┘ └┴┘└┶┛┗┻┛┗┵┘
|
||
*
|
||
* Other:
|
||
* ╭─╮ ╲ ╱ ╷╻╎╏┆┇┊┋ ╺╾╴ ╌╌╌ ┄┄┄ ┈┈┈
|
||
* │ │ ╳ ╽╿╎╏┆┇┊┋ ╶╼╸ ╍╍╍ ┅┅┅ ┉┉┉
|
||
* ╰─╯ ╱ ╲ ╹╵╎╏┆┇┊┋
|
||
*
|
||
* All box drawing characters:
|
||
* ─ ━ │ ┃ ┄ ┅ ┆ ┇ ┈ ┉ ┊ ┋ ┌ ┍ ┎ ┏
|
||
* ┐ ┑ ┒ ┓ └ ┕ ┖ ┗ ┘ ┙ ┚ ┛ ├ ┝ ┞ ┟
|
||
* ┠ ┡ ┢ ┣ ┤ ┥ ┦ ┧ ┨ ┩ ┪ ┫ ┬ ┭ ┮ ┯
|
||
* ┰ ┱ ┲ ┳ ┴ ┵ ┶ ┷ ┸ ┹ ┺ ┻ ┼ ┽ ┾ ┿
|
||
* ╀ ╁ ╂ ╃ ╄ ╅ ╆ ╇ ╈ ╉ ╊ ╋ ╌ ╍ ╎ ╏
|
||
* ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟
|
||
* ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬ ╭ ╮ ╯
|
||
* ╰ ╱ ╲ ╳ ╴ ╵ ╶ ╷ ╸ ╹ ╺ ╻ ╼ ╽ ╾ ╿
|
||
*
|
||
* ---
|
||
*
|
||
* Box drawing alignment tests: █
|
||
* ▉
|
||
* ╔══╦══╗ ┌──┬──┐ ╭──┬──╮ ╭──┬──╮ ┏━━┳━━┓ ┎┒┏┑ ╷ ╻ ┏┯┓ ┌┰┐ ▊ ╱╲╱╲╳╳╳
|
||
* ║┌─╨─┐║ │╔═╧═╗│ │╒═╪═╕│ │╓─╁─╖│ ┃┌─╂─┐┃ ┗╃╄┙ ╶┼╴╺╋╸┠┼┨ ┝╋┥ ▋ ╲╱╲╱╳╳╳
|
||
* ║│╲ ╱│║ │║ ║│ ││ │ ││ │║ ┃ ║│ ┃│ ╿ │┃ ┍╅╆┓ ╵ ╹ ┗┷┛ └┸┘ ▌ ╱╲╱╲╳╳╳
|
||
* ╠╡ ╳ ╞╣ ├╢ ╟┤ ├┼─┼─┼┤ ├╫─╂─╫┤ ┣┿╾┼╼┿┫ ┕┛┖┚ ┌┄┄┐ ╎ ┏┅┅┓ ┋ ▍ ╲╱╲╱╳╳╳
|
||
* ║│╱ ╲│║ │║ ║│ ││ │ ││ │║ ┃ ║│ ┃│ ╽ │┃ ░░▒▒▓▓██ ┊ ┆ ╎ ╏ ┇ ┋ ▎
|
||
* ║└─╥─┘║ │╚═╤═╝│ │╘═╪═╛│ │╙─╀─╜│ ┃└─╂─┘┃ ░░▒▒▓▓██ ┊ ┆ ╎ ╏ ┇ ┋ ▏
|
||
* ╚══╩══╝ └──┴──┘ ╰──┴──╯ ╰──┴──╯ ┗━━┻━━┛ └╌╌┘ ╎ ┗╍╍┛ ┋ ▁▂▃▄▅▆▇█
|
||
*
|
||
* Source: https://www.w3.org/2001/06/utf-8-test/UTF-8-demo.html
|
||
*/
|
||
function drawBoxDrawingChar(
|
||
ctx: CanvasRenderingContext2D,
|
||
charDefinition: { [fontWeight: number]: string | ((xp: number, yp: number) => string) },
|
||
xOffset: number,
|
||
yOffset: number,
|
||
scaledCellWidth: number,
|
||
scaledCellHeight: number
|
||
): void {
|
||
ctx.strokeStyle = ctx.fillStyle;
|
||
for (const [fontWeight, instructions] of Object.entries(charDefinition)) {
|
||
ctx.beginPath();
|
||
ctx.lineWidth = window.devicePixelRatio * Number.parseInt(fontWeight);
|
||
let actualInstructions: string;
|
||
if (typeof instructions === 'function') {
|
||
const xp = .15;
|
||
const yp = .15 / scaledCellHeight * scaledCellWidth;
|
||
actualInstructions = instructions(xp, yp);
|
||
} else {
|
||
actualInstructions = instructions;
|
||
}
|
||
for (const instruction of actualInstructions.split(' ')) {
|
||
const type = instruction[0];
|
||
const f = svgToCanvasInstructionMap[type];
|
||
if (!f) {
|
||
console.error(`Could not find drawing instructions for "${type}"`);
|
||
continue;
|
||
}
|
||
const args: string[] = instruction.substring(1).split(',');
|
||
if (!args[0] || !args[1]) {
|
||
continue;
|
||
}
|
||
f(ctx, translateArgs(args, scaledCellWidth, scaledCellHeight, xOffset, yOffset));
|
||
}
|
||
ctx.stroke();
|
||
ctx.closePath();
|
||
}
|
||
}
|
||
|
||
function clamp(value: number, max: number, min: number = 0): number {
|
||
return Math.max(Math.min(value, max), min);
|
||
}
|
||
|
||
const svgToCanvasInstructionMap: { [index: string]: any } = {
|
||
'C': (ctx: CanvasRenderingContext2D, args: number[]) => ctx.bezierCurveTo(args[0], args[1], args[2], args[3], args[4], args[5]),
|
||
'L': (ctx: CanvasRenderingContext2D, args: number[]) => ctx.lineTo(args[0], args[1]),
|
||
'M': (ctx: CanvasRenderingContext2D, args: number[]) => ctx.moveTo(args[0], args[1])
|
||
};
|
||
|
||
function translateArgs(args: string[], cellWidth: number, cellHeight: number, xOffset: number, yOffset: number): number[] {
|
||
const result = args.map(e => parseFloat(e) || parseInt(e));
|
||
|
||
if (result.length < 2) {
|
||
throw new Error('Too few arguments for instruction');
|
||
}
|
||
|
||
for (let x = 0; x < result.length; x += 2) {
|
||
// Translate from 0-1 to 0-cellWidth
|
||
result[x] *= cellWidth;
|
||
// Ensure coordinate doesn't escape cell bounds and round to the nearest 0.5 to ensure a crisp
|
||
// line at 100% devicePixelRatio
|
||
if (result[x] !== 0) {
|
||
result[x] = clamp(Math.round(result[x] + 0.5) - 0.5, cellWidth, 0);
|
||
}
|
||
// Apply the cell's offset (ie. x*cellWidth)
|
||
result[x] += xOffset;
|
||
}
|
||
|
||
for (let y = 1; y < result.length; y += 2) {
|
||
// Translate from 0-1 to 0-cellHeight
|
||
result[y] *= cellHeight;
|
||
// Ensure coordinate doesn't escape cell bounds and round to the nearest 0.5 to ensure a crisp
|
||
// line at 100% devicePixelRatio
|
||
if (result[y] !== 0) {
|
||
result[y] = clamp(Math.round(result[y] + 0.5) - 0.5, cellHeight, 0);
|
||
}
|
||
// Apply the cell's offset (ie. x*cellHeight)
|
||
result[y] += yOffset;
|
||
}
|
||
|
||
return result;
|
||
}
|