eiac/xterm.js
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Move CellData into new file

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Daniel Imms
2019-06-14 22:51:08 -07:00
parent 3adddbf95a
commit 4330741c5d
19 changed files with 120 additions and 108 deletions
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src/common/buffer/BufferLine.ts
+1 -90
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@@ -6,6 +6,7 @@
import { CharData, IBufferLine, ICellData, IColorRGB, IAttributeData } from 'common/Types';
import { stringFromCodePoint } from 'common/input/TextDecoder';
import { DEFAULT_COLOR, CHAR_DATA_CHAR_INDEX, CHAR_DATA_WIDTH_INDEX, CHAR_DATA_ATTR_INDEX, NULL_CELL_CHAR, NULL_CELL_WIDTH, NULL_CELL_CODE, WHITESPACE_CELL_CHAR } from 'common/buffer/Constants';
import { CellData } from './CellData';
/**
* buffer memory layout:
@@ -195,96 +196,6 @@ export class AttributeData implements IAttributeData {
export const DEFAULT_ATTR_DATA = Object.freeze(new AttributeData());
/**
* CellData - represents a single Cell in the terminal buffer.
*/
export class CellData extends AttributeData implements ICellData {
/** Helper to create CellData from CharData. */
public static fromCharData(value: CharData): CellData {
const obj = new CellData();
obj.setFromCharData(value);
return obj;
}
/** Primitives from terminal buffer. */
public content: number = 0;
public fg: number = 0;
public bg: number = 0;
public combinedData: string = '';
/** Whether cell contains a combined string. */
public isCombined(): number {
return this.content & Content.IS_COMBINED_MASK;
}
/** Width of the cell. */
public getWidth(): number {
return this.content >> Content.WIDTH_SHIFT;
}
/** JS string of the content. */
public getChars(): string {
if (this.content & Content.IS_COMBINED_MASK) {
return this.combinedData;
}
if (this.content & Content.CODEPOINT_MASK) {
return stringFromCodePoint(this.content & Content.CODEPOINT_MASK);
}
return '';
}
/**
* Codepoint of cell
* Note this returns the UTF32 codepoint of single chars,
* if content is a combined string it returns the codepoint
* of the last char in string to be in line with code in CharData.
* */
public getCode(): number {
return (this.isCombined())
? this.combinedData.charCodeAt(this.combinedData.length - 1)
: this.content & Content.CODEPOINT_MASK;
}
/** Set data from CharData */
public setFromCharData(value: CharData): void {
this.fg = value[CHAR_DATA_ATTR_INDEX];
this.bg = 0;
let combined = false;
// surrogates and combined strings need special treatment
if (value[CHAR_DATA_CHAR_INDEX].length > 2) {
combined = true;
} else if (value[CHAR_DATA_CHAR_INDEX].length === 2) {
const code = value[CHAR_DATA_CHAR_INDEX].charCodeAt(0);
// if the 2-char string is a surrogate create single codepoint
// everything else is combined
if (0xD800 <= code && code <= 0xDBFF) {
const second = value[CHAR_DATA_CHAR_INDEX].charCodeAt(1);
if (0xDC00 <= second && second <= 0xDFFF) {
this.content = ((code - 0xD800) * 0x400 + second - 0xDC00 + 0x10000) | (value[CHAR_DATA_WIDTH_INDEX] << Content.WIDTH_SHIFT);
} else {
combined = true;
}
} else {
combined = true;
}
} else {
this.content = value[CHAR_DATA_CHAR_INDEX].charCodeAt(0) | (value[CHAR_DATA_WIDTH_INDEX] << Content.WIDTH_SHIFT);
}
if (combined) {
this.combinedData = value[CHAR_DATA_CHAR_INDEX];
this.content = Content.IS_COMBINED_MASK | (value[CHAR_DATA_WIDTH_INDEX] << Content.WIDTH_SHIFT);
}
}
/** Get data as CharData. */
public getAsCharData(): CharData {
return [this.fg, this.getChars(), this.getWidth(), this.getCode()];
}
}
/**
* Typed array based bufferline implementation.
*