react-native-readium
Version:
A react-native wrapper for https://readium.org/
62 lines (61 loc) • 1.74 kB
JavaScript
import { Appearance, FontFamily, TextAlignment, ColumnCount } from '../enums';
import { RANGES, indexOfObjectValue, clamp } from '../utils';
/**
* A reader settings object with sensible defaults.
*/
export class Settings {
// TODO:
// - ligatures
// - paraIndent
appearance = Appearance.DEFAULT;
fontFamily = FontFamily.ORIGINAL;
textAlign = TextAlignment.JUSTIFY;
colCount = ColumnCount.AUTO;
scroll = false;
fontOverride = false;
verticalScroll = false;
bodyHyphens = false;
advancedSettings = true;
/**
* Range: 100.0 - 300.0
*/
fontSize = 100;
/**
* Range: 0.0 - 0.5
*/
wordSpacing = 0;
/**
* Range: 0.0 - 0.5
*/
letterSpacing = 0;
/**
* Range: 0.5 - 4.0
*/
pageMargins = 0;
/**
* Range: 1.0 - 2.0
*/
lineHeight = 1;
/**
* Range: 0.0 - 2.0
*/
paragraphMargins = 0;
static map(settings) {
const defaultValues = new Settings();
const mapped = {};
Object.keys(defaultValues).forEach((key) => {
mapped[key] =
// @ts-ignore
settings[key] !== undefined ? settings[key] : defaultValues[key];
});
mapped.appearance = indexOfObjectValue(Appearance, mapped.appearance);
mapped.fontFamily = indexOfObjectValue(FontFamily, mapped.fontFamily);
mapped.textAlign = indexOfObjectValue(TextAlignment, mapped.textAlign);
mapped.colCount = indexOfObjectValue(ColumnCount, mapped.colCount);
Object.keys(RANGES).forEach((key) => {
// @ts-ignore
mapped[key] = clamp(mapped[key], RANGES[key][0], RANGES[key][1]);
});
return mapped;
}
}