75 lines
2.6 KiB
JavaScript
75 lines
2.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.measureText = measureText;
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exports.splitLines = splitLines;
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exports.measureTextHeight = measureTextHeight;
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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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const char = text[i];
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const fontChar = font.chars[char];
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if (fontChar) {
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const fontKerning = font.kernings[char];
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const nextChar = text[i + 1];
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const kerning = fontKerning && nextChar && fontKerning[nextChar]
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? fontKerning[nextChar] || 0
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: 0;
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x += (fontChar.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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function splitLines(font, text, maxWidth) {
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const words = text.replace(/[\r\n]+/g, " \n").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 wordWidth = measureText(font, word + (words.length > 1 ? " " : ""));
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// If a word is longer than the allowable width we need to split it across lines.
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if (wordWidth > maxWidth) {
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const characterIterator = word[Symbol.iterator]();
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let current = "";
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for (const char of characterIterator) {
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const nextLine = [...currentLine, current + char].join(" ");
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const length = measureText(font, nextLine);
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if (length < maxWidth) {
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current += char;
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}
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else if (length > maxWidth) {
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lines.push([...currentLine, current]);
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currentLine = [];
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current = char;
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}
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else {
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lines.push([...currentLine, current + char]);
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currentLine = [];
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current = "";
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}
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}
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return;
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}
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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 && !word.includes("\n")) {
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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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}
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else {
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lines.push(currentLine);
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currentLine = [word.replace("\n", "")];
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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 measureTextHeight(font, text, maxWidth) {
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const { lines } = splitLines(font, text, maxWidth);
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return lines.length * font.common.lineHeight;
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}
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//# sourceMappingURL=measure-text.js.map
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