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node_modules/pixi.js/lib/scene/text-bitmap/utils/getBitmapTextLayout.mjs
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159
node_modules/pixi.js/lib/scene/text-bitmap/utils/getBitmapTextLayout.mjs
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"use strict";
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function getBitmapTextLayout(chars, style, font, trimEnd) {
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const layoutData = {
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width: 0,
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height: 0,
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offsetY: 0,
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scale: style.fontSize / font.baseMeasurementFontSize,
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lines: [{
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width: 0,
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charPositions: [],
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spaceWidth: 0,
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spacesIndex: [],
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chars: []
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}]
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};
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layoutData.offsetY = font.baseLineOffset;
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let currentLine = layoutData.lines[0];
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let previousChar = null;
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let firstWord = true;
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const currentWord = {
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spaceWord: false,
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width: 0,
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start: 0,
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index: 0,
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// use index to not modify the array as we use it a lot!
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positions: [],
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chars: []
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};
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const nextWord = (word) => {
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const start = currentLine.width;
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for (let j = 0; j < currentWord.index; j++) {
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const position = word.positions[j];
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currentLine.chars.push(word.chars[j]);
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currentLine.charPositions.push(position + start);
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}
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currentLine.width += word.width;
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firstWord = false;
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currentWord.width = 0;
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currentWord.index = 0;
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currentWord.chars.length = 0;
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};
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const nextLine = () => {
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let index = currentLine.chars.length - 1;
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if (trimEnd) {
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let lastChar = currentLine.chars[index];
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while (lastChar === " ") {
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currentLine.width -= font.chars[lastChar].xAdvance;
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lastChar = currentLine.chars[--index];
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}
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}
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layoutData.width = Math.max(layoutData.width, currentLine.width);
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currentLine = {
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width: 0,
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charPositions: [],
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chars: [],
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spaceWidth: 0,
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spacesIndex: []
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};
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firstWord = true;
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layoutData.lines.push(currentLine);
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layoutData.height += font.lineHeight;
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};
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const scale = font.baseMeasurementFontSize / style.fontSize;
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const adjustedLetterSpacing = style.letterSpacing * scale;
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const adjustedWordWrapWidth = style.wordWrapWidth * scale;
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for (let i = 0; i < chars.length + 1; i++) {
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let char;
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const isEnd = i === chars.length;
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if (!isEnd) {
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char = chars[i];
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}
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const charData = font.chars[char] || font.chars[" "];
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const isSpace = /(?:\s)/.test(char);
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const isWordBreak = isSpace || char === "\r" || char === "\n" || isEnd;
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if (isWordBreak) {
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const addWordToNextLine = !firstWord && style.wordWrap && currentLine.width + currentWord.width - adjustedLetterSpacing > adjustedWordWrapWidth;
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if (addWordToNextLine) {
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nextLine();
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nextWord(currentWord);
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if (!isEnd) {
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currentLine.charPositions.push(0);
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}
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} else {
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currentWord.start = currentLine.width;
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nextWord(currentWord);
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if (!isEnd) {
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currentLine.charPositions.push(0);
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}
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}
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if (char === "\r" || char === "\n") {
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if (currentLine.width !== 0) {
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nextLine();
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}
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} else if (!isEnd) {
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const spaceWidth = charData.xAdvance + (charData.kerning[previousChar] || 0) + adjustedLetterSpacing;
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currentLine.width += spaceWidth;
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currentLine.spaceWidth = spaceWidth;
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currentLine.spacesIndex.push(currentLine.charPositions.length);
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currentLine.chars.push(char);
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}
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} else {
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const kerning = charData.kerning[previousChar] || 0;
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const nextCharWidth = charData.xAdvance + kerning + adjustedLetterSpacing;
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currentWord.positions[currentWord.index++] = currentWord.width + kerning;
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currentWord.chars.push(char);
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currentWord.width += nextCharWidth;
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}
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previousChar = char;
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}
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nextLine();
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if (style.align === "center") {
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alignCenter(layoutData);
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} else if (style.align === "right") {
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alignRight(layoutData);
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} else if (style.align === "justify") {
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alignJustify(layoutData);
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}
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return layoutData;
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}
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function alignCenter(measurementData) {
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for (let i = 0; i < measurementData.lines.length; i++) {
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const line = measurementData.lines[i];
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const offset = measurementData.width / 2 - line.width / 2;
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for (let j = 0; j < line.charPositions.length; j++) {
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line.charPositions[j] += offset;
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}
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}
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}
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function alignRight(measurementData) {
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for (let i = 0; i < measurementData.lines.length; i++) {
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const line = measurementData.lines[i];
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const offset = measurementData.width - line.width;
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for (let j = 0; j < line.charPositions.length; j++) {
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line.charPositions[j] += offset;
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}
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}
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}
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function alignJustify(measurementData) {
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const width = measurementData.width;
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for (let i = 0; i < measurementData.lines.length; i++) {
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const line = measurementData.lines[i];
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let indy = 0;
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let spaceIndex = line.spacesIndex[indy++];
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let offset = 0;
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const totalSpaces = line.spacesIndex.length;
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const newSpaceWidth = (width - line.width) / totalSpaces;
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const spaceWidth = newSpaceWidth;
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for (let j = 0; j < line.charPositions.length; j++) {
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if (j === spaceIndex) {
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spaceIndex = line.spacesIndex[indy++];
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offset += spaceWidth;
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}
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line.charPositions[j] += offset;
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}
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}
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}
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export { getBitmapTextLayout };
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//# sourceMappingURL=getBitmapTextLayout.mjs.map
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