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322
app/node_modules/@jimp/plugin-print/src/index.js
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322
app/node_modules/@jimp/plugin-print/src/index.js
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import Path from 'path';
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import bMFont from 'load-bmfont';
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import { isNodePattern, throwError } from '@jimp/utils';
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import { measureText, measureTextHeight } from './measure-text';
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function xOffsetBasedOnAlignment(constants, font, line, maxWidth, alignment) {
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if (alignment === constants.HORIZONTAL_ALIGN_LEFT) {
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return 0;
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}
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if (alignment === constants.HORIZONTAL_ALIGN_CENTER) {
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return (maxWidth - measureText(font, line)) / 2;
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}
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return maxWidth - measureText(font, line);
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}
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function drawCharacter(image, font, x, y, char) {
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if (char.width > 0 && char.height > 0) {
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const characterPage = font.pages[char.page];
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image.blit(
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characterPage,
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x + char.xoffset,
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y + char.yoffset,
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char.x,
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char.y,
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char.width,
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char.height
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);
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}
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return image;
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}
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function printText(font, x, y, text, defaultCharWidth) {
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for (let i = 0; i < text.length; i++) {
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let char;
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if (font.chars[text[i]]) {
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char = text[i];
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} else if (/\s/.test(text[i])) {
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char = '';
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} else {
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char = '?';
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}
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const fontChar = font.chars[char] || {};
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const fontKerning = font.kernings[char];
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drawCharacter(this, font, x, y, fontChar || {});
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const kerning =
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fontKerning && fontKerning[text[i + 1]] ? fontKerning[text[i + 1]] : 0;
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x += kerning + (fontChar.xadvance || defaultCharWidth);
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}
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}
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function splitLines(font, text, maxWidth) {
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const words = text.split(' ');
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const lines = [];
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let currentLine = [];
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let longestLine = 0;
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words.forEach(word => {
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const line = [...currentLine, word].join(' ');
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const length = measureText(font, line);
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if (length <= maxWidth) {
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if (length > longestLine) {
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longestLine = length;
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}
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currentLine.push(word);
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} else {
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lines.push(currentLine);
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currentLine = [word];
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}
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});
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lines.push(currentLine);
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return {
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lines,
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longestLine
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};
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}
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function loadPages(Jimp, dir, pages) {
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const newPages = pages.map(page => {
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return Jimp.read(dir + '/' + page);
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});
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return Promise.all(newPages);
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}
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const dir = process.env.DIRNAME || `${__dirname}/../`;
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export default () => ({
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constants: {
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measureText,
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measureTextHeight,
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FONT_SANS_8_BLACK: Path.join(
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dir,
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'fonts/open-sans/open-sans-8-black/open-sans-8-black.fnt'
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),
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FONT_SANS_10_BLACK: Path.join(
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dir,
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'fonts/open-sans/open-sans-10-black/open-sans-10-black.fnt'
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),
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FONT_SANS_12_BLACK: Path.join(
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dir,
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'fonts/open-sans/open-sans-12-black/open-sans-12-black.fnt'
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),
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FONT_SANS_14_BLACK: Path.join(
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dir,
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'fonts/open-sans/open-sans-14-black/open-sans-14-black.fnt'
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),
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FONT_SANS_16_BLACK: Path.join(
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dir,
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'fonts/open-sans/open-sans-16-black/open-sans-16-black.fnt'
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),
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FONT_SANS_32_BLACK: Path.join(
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dir,
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'fonts/open-sans/open-sans-32-black/open-sans-32-black.fnt'
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),
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FONT_SANS_64_BLACK: Path.join(
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dir,
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'fonts/open-sans/open-sans-64-black/open-sans-64-black.fnt'
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),
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FONT_SANS_128_BLACK: Path.join(
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dir,
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'fonts/open-sans/open-sans-128-black/open-sans-128-black.fnt'
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),
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FONT_SANS_8_WHITE: Path.join(
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dir,
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'fonts/open-sans/open-sans-8-white/open-sans-8-white.fnt'
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),
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FONT_SANS_16_WHITE: Path.join(
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dir,
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'fonts/open-sans/open-sans-16-white/open-sans-16-white.fnt'
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),
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FONT_SANS_32_WHITE: Path.join(
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dir,
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'fonts/open-sans/open-sans-32-white/open-sans-32-white.fnt'
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),
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FONT_SANS_64_WHITE: Path.join(
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dir,
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'fonts/open-sans/open-sans-64-white/open-sans-64-white.fnt'
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),
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FONT_SANS_128_WHITE: Path.join(
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dir,
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'fonts/open-sans/open-sans-128-white/open-sans-128-white.fnt'
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),
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/**
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* Loads a bitmap font from a file
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* @param {string} file the file path of a .fnt file
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* @param {function(Error, Jimp)} cb (optional) a function to call when the font is loaded
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* @returns {Promise} a promise
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*/
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loadFont(file, cb) {
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if (typeof file !== 'string')
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return throwError.call(this, 'file must be a string', cb);
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return new Promise((resolve, reject) => {
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cb =
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cb ||
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function(err, font) {
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if (err) reject(err);
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else resolve(font);
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};
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bMFont(file, (err, font) => {
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const chars = {};
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const kernings = {};
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if (err) {
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return throwError.call(this, err, cb);
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}
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for (let i = 0; i < font.chars.length; i++) {
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chars[String.fromCharCode(font.chars[i].id)] = font.chars[i];
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}
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for (let i = 0; i < font.kernings.length; i++) {
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const firstString = String.fromCharCode(font.kernings[i].first);
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kernings[firstString] = kernings[firstString] || {};
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kernings[firstString][
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String.fromCharCode(font.kernings[i].second)
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] = font.kernings[i].amount;
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}
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loadPages(this, Path.dirname(file), font.pages).then(pages => {
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cb(null, {
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chars,
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kernings,
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pages,
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common: font.common,
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info: font.info
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});
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});
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});
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});
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}
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},
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class: {
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/**
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* Draws a text on a image on a given boundary
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* @param {Jimp} font a bitmap font loaded from `Jimp.loadFont` command
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* @param {number} x the x position to start drawing the text
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* @param {number} y the y position to start drawing the text
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* @param {any} text the text to draw (string or object with `text`, `alignmentX`, and/or `alignmentY`)
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* @param {number} maxWidth (optional) the boundary width to draw in
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* @param {number} maxHeight (optional) the boundary height to draw in
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* @param {function(Error, Jimp)} cb (optional) a function to call when the text is written
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* @returns {Jimp} this for chaining of methods
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*/
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print(font, x, y, text, maxWidth, maxHeight, cb) {
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if (typeof maxWidth === 'function' && typeof cb === 'undefined') {
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cb = maxWidth;
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maxWidth = Infinity;
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}
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if (typeof maxWidth === 'undefined') {
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maxWidth = Infinity;
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}
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if (typeof maxHeight === 'function' && typeof cb === 'undefined') {
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cb = maxHeight;
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maxHeight = Infinity;
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}
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if (typeof maxHeight === 'undefined') {
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maxHeight = Infinity;
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}
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if (typeof font !== 'object') {
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return throwError.call(this, 'font must be a Jimp loadFont', cb);
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}
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if (
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typeof x !== 'number' ||
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typeof y !== 'number' ||
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typeof maxWidth !== 'number'
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) {
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return throwError.call(this, 'x, y and maxWidth must be numbers', cb);
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}
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if (typeof maxWidth !== 'number') {
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return throwError.call(this, 'maxWidth must be a number', cb);
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}
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if (typeof maxHeight !== 'number') {
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return throwError.call(this, 'maxHeight must be a number', cb);
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}
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let alignmentX;
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let alignmentY;
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if (
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typeof text === 'object' &&
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text.text !== null &&
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text.text !== undefined
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) {
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alignmentX = text.alignmentX || this.constructor.HORIZONTAL_ALIGN_LEFT;
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alignmentY = text.alignmentY || this.constructor.VERTICAL_ALIGN_TOP;
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({ text } = text);
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} else {
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alignmentX = this.constructor.HORIZONTAL_ALIGN_LEFT;
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alignmentY = this.constructor.VERTICAL_ALIGN_TOP;
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text = text.toString();
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}
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if (
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maxHeight !== Infinity &&
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alignmentY === this.constructor.VERTICAL_ALIGN_BOTTOM
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) {
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y += maxHeight - measureTextHeight(font, text, maxWidth);
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} else if (
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maxHeight !== Infinity &&
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alignmentY === this.constructor.VERTICAL_ALIGN_MIDDLE
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) {
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y += maxHeight / 2 - measureTextHeight(font, text, maxWidth) / 2;
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}
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const defaultCharWidth = Object.entries(font.chars)[0][1].xadvance;
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const { lines, longestLine } = splitLines(font, text, maxWidth);
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lines.forEach(line => {
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const lineString = line.join(' ');
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const alignmentWidth = xOffsetBasedOnAlignment(
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this.constructor,
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font,
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lineString,
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maxWidth,
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alignmentX
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);
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printText.call(
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this,
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font,
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x + alignmentWidth,
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y,
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lineString,
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defaultCharWidth
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);
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y += font.common.lineHeight;
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});
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if (isNodePattern(cb)) {
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cb.call(this, null, this, { x: x + longestLine, y });
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}
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return this;
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}
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}
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});
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36
app/node_modules/@jimp/plugin-print/src/measure-text.js
generated
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36
app/node_modules/@jimp/plugin-print/src/measure-text.js
generated
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@@ -0,0 +1,36 @@
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export function measureText(font, text) {
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let x = 0;
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for (let i = 0; i < text.length; i++) {
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if (font.chars[text[i]]) {
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const kerning =
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font.kernings[text[i]] && font.kernings[text[i]][text[i + 1]]
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? font.kernings[text[i]][text[i + 1]]
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: 0;
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x += (font.chars[text[i]].xadvance || 0) + kerning;
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}
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}
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return x;
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}
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export function measureTextHeight(font, text, maxWidth) {
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const words = text.split(' ');
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let line = '';
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let textTotalHeight = font.common.lineHeight;
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for (let n = 0; n < words.length; n++) {
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const testLine = line + words[n] + ' ';
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const testWidth = measureText(font, testLine);
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if (testWidth > maxWidth && n > 0) {
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textTotalHeight += font.common.lineHeight;
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line = words[n] + ' ';
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} else {
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line = testLine;
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}
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}
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return textTotalHeight;
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}
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