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{"version":3,"file":"getBitmapTextLayout.mjs","sources":["../../../../src/scene/text-bitmap/utils/getBitmapTextLayout.ts"],"sourcesContent":["import type { TextStyle } from '../../text/TextStyle';\nimport type { AbstractBitmapFont } from '../AbstractBitmapFont';\n\nexport interface BitmapTextLayoutData\n{\n width: number;\n height: number;\n scale: number;\n offsetY: number;\n lines: {\n width: number\n charPositions: number[],\n chars: string[],\n // / spaces: number\n spaceWidth: number\n spacesIndex: number[]\n }[];\n}\n\nexport function getBitmapTextLayout(\n chars: string[],\n style: TextStyle,\n font: AbstractBitmapFont<any>,\n trimEnd: boolean\n): BitmapTextLayoutData\n{\n const layoutData: BitmapTextLayoutData = {\n width: 0,\n height: 0,\n offsetY: 0,\n scale: style.fontSize / font.baseMeasurementFontSize,\n lines: [{\n width: 0,\n charPositions: [] as number[],\n spaceWidth: 0,\n spacesIndex: [],\n chars: [],\n }]\n };\n\n layoutData.offsetY = font.baseLineOffset;\n\n let currentLine = layoutData.lines[0];\n\n let previousChar: string = null;\n let firstWord = true;\n // let spaceCount = 0;\n\n const currentWord = {\n spaceWord: false,\n width: 0,\n start: 0,\n index: 0, // use index to not modify the array as we use it a lot!\n positions: [] as number[],\n chars: [] as string[],\n };\n\n const nextWord = (word: typeof currentWord) =>\n {\n const start = currentLine.width;\n\n for (let j = 0; j < currentWord.index; j++)\n {\n const position = word.positions[j];\n\n currentLine.chars.push(word.chars[j]);\n currentLine.charPositions.push(position + start);\n }\n\n currentLine.width += word.width;\n\n firstWord = false;\n\n // reset the word..\n currentWord.width = 0;\n currentWord.index = 0;\n currentWord.chars.length = 0;\n\n // spaceCount = 0;\n };\n\n const nextLine = () =>\n {\n let index = currentLine.chars.length - 1;\n\n if (trimEnd)\n {\n let lastChar = currentLine.chars[index];\n\n while (lastChar === ' ')\n {\n currentLine.width -= font.chars[lastChar].xAdvance;\n lastChar = currentLine.chars[--index];\n }\n }\n\n layoutData.width = Math.max(layoutData.width, currentLine.width);\n\n currentLine = {\n width: 0,\n charPositions: [],\n chars: [],\n spaceWidth: 0,\n spacesIndex: [],\n };\n\n firstWord = true;\n layoutData.lines.push(currentLine);\n layoutData.height += font.lineHeight;\n };\n\n const scale = font.baseMeasurementFontSize / style.fontSize;\n\n const adjustedLetterSpacing = style.letterSpacing * scale;\n const adjustedWordWrapWidth = style.wordWrapWidth * scale;\n\n // loop an extra time to force a line break..\n for (let i = 0; i < chars.length + 1; i++)\n {\n let char: string;\n\n const isEnd = i === chars.length;\n\n if (!isEnd)\n {\n char = chars[i];\n }\n\n const charData = font.chars[char] || font.chars[' '];\n\n const isSpace = (/(?:\\s)/).test(char);\n const isWordBreak = isSpace || char === '\\r' || char === '\\n' || isEnd;\n\n // spaceCount++;\n // wasSpace = isSpace;\n\n if (isWordBreak)\n 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adjustedLetterSpacing;\n\n currentWord.positions[currentWord.index++] = currentWord.width + kerning;\n currentWord.chars.push(char);\n\n currentWord.width += nextCharWidth;\n }\n\n previousChar = char;\n // lastChar = char;\n }\n\n nextLine();\n\n if (style.align === 'center')\n {\n alignCenter(layoutData);\n }\n else if (style.align === 'right')\n {\n alignRight(layoutData);\n }\n else if (style.align === 'justify')\n {\n alignJustify(layoutData);\n }\n\n return layoutData;\n}\n\nfunction alignCenter(measurementData: BitmapTextLayoutData)\n{\n for (let i = 0; i < measurementData.lines.length; i++)\n {\n const line = measurementData.lines[i];\n const offset = ((measurementData.width / 2) - (line.width / 2));\n\n for (let j = 0; j < line.charPositions.length; j++)\n {\n line.charPositions[j] += offset;\n }\n }\n}\n\nfunction alignRight(measurementData: BitmapTextLayoutData)\n{\n for (let i = 0; i < measurementData.lines.length; i++)\n {\n const line = measurementData.lines[i];\n const offset = ((measurementData.width) - (line.width));\n\n for (let j = 0; j < line.charPositions.length; j++)\n {\n line.charPositions[j] += offset;\n }\n }\n}\n\nfunction alignJustify(measurementData: BitmapTextLayoutData)\n{\n const width = measurementData.width;\n\n for (let i = 0; i < measurementData.lines.length; i++)\n {\n const line = measurementData.lines[i];\n\n let indy = 0;\n let spaceIndex = line.spacesIndex[indy++];\n\n let offset = 0;\n\n const totalSpaces = line.spacesIndex.length;\n\n const newSpaceWidth = (width - line.width) / totalSpaces;\n\n const spaceWidth = newSpaceWidth;\n\n for (let j = 0; j < line.charPositions.length; j++)\n {\n if (j === spaceIndex)\n {\n spaceIndex = line.spacesIndex[indy++];\n\n offset += spaceWidth;\n }\n\n line.charPositions[j] += offset;\n }\n 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