{"version":3,"file":"subtitle-utils.cjs","sources":["../../../src/utils/subtitle-utils.js"],"sourcesContent":["/**\n * 字幕工具函数\n */\n\n/**\n * 计算混合中英文的语音时间\n * @param {string} text - 文本内容\n * @param {number} chineseSpeed - 中文速度（字符/分钟），默认 200\n * @param {number} englishSpeed - 英文速度（单词/分钟），默认 150\n * @returns {number} 总时间（秒）\n */\nexport function calculateSpeechTimeMixed(text, chineseSpeed = 200, englishSpeed = 150) {\n if (!text || typeof text !== 'string') return 0;\n\n // 统计中文字符数（Unicode中文范围）\n const chineseChars = text.match(/[\\u4e00-\\u9fa5]/g) || [];\n const chineseCount = chineseChars.length;\n\n // 统计英文单词数（按空格分割，过滤空值）\n const englishWords = text\n .replace(/[\\u4e00-\\u9fa5]/g, ' ') // 移除中文以准确统计英文单词\n .trim()\n .split(/\\s+/)\n .filter(word => word.length > 0);\n const englishCount = englishWords.length;\n\n // 计算两部分时间（秒）\n const chineseTime = (chineseCount / chineseSpeed) * 60;\n const englishTime = (englishCount / englishSpeed) * 60;\n\n // 返回总时间（四舍五入）\n return Math.round(chineseTime + englishTime);\n}\n\nconst SIGN = '_$_';\n\n/**\n * 检查是否正在分割英文单词\n */\nfunction isSplittingEnglishWord(text, position) {\n if (position === 0 || position >= text.length) return false;\n \n const prevChar = text[position - 1];\n const currChar = text[position];\n \n // 如果前后字符都是英文字母，说明正在分割单词\n return /[a-zA-Z]/.test(prevChar) && /[a-zA-Z]/.test(currChar);\n}\n\n/**\n * 查找安全的分割点\n */\nfunction findSafeSplitPoint(text, start, proposedEnd, maxLength) {\n let end = proposedEnd;\n \n // 方案1：向前查找空格或标点\n for (let i = end - 1; i > start; i--) {\n if (text[i] === ' ' || /[，。！？、,.;!?]/.test(text[i])) {\n return i + 1; // 在空格或标点后分割\n }\n }\n \n // 方案2：向后查找空格或标点\n for (let i = end; i < Math.min(text.length, end + 10); i++) {\n if (text[i] === ' ' || /[，。！？、,.;!?]/.test(text[i])) {\n return i + 1; // 在空格或标点后分割\n }\n }\n \n // 方案3：如果找不到合适位置，尽量完整包含单词\n if (end < text.length) {\n let wordEnd = end;\n while (wordEnd < text.length && /[a-zA-Z]/.test(text[wordEnd])) {\n wordEnd++;\n }\n \n // 如果单词长度可控，尽量完整包含\n if (wordEnd - start <= maxLength + 5) {\n return wordEnd;\n }\n }\n \n // 最后手段：按原位置分割\n return proposedEnd;\n}\n\n/**\n * 按标点符号和最大长度分割文本\n * @param {string} text - 文本内容\n * @param {number} maxLength - 每段最大字符数\n * @returns {Array} 分割后的文本段落数组\n */\nfunction splitText(text, maxLength = 20) {\n if (!text || typeof text !== 'string') return [];\n \n // 1. 去除多余的引号和换行符\n text = text.replace(/[\"\"\"''\\n\\r]/g, '');\n \n // 2. 替换标点为 SIGN + 标点（标点后插入 SIGN）\n const regexp = /([。？！,!;；，,])/g;\n text = text.replace(regexp, `$1${SIGN}`); // 标点后加 SIGN\n \n // 3. 按 SIGN 分割，并过滤空字符串\n let segments = text.split(SIGN).filter(seg => seg.trim());\n \n // 4. 处理长句子（超过 maxLength 的按字数分割），保护英文单词\n segments = segments.flatMap(seg => {\n if (seg.length <= maxLength) return seg;\n \n const chunks = [];\n let start = 0;\n \n while (start < seg.length) {\n let end = Math.min(start + maxLength, seg.length);\n \n // 避免在标点中间切断\n if (end < seg.length && /[，。！？、,.;!?]/.test(seg[end])) {\n end++;\n }\n // 避免分割英文单词\n else if (end < seg.length && isSplittingEnglishWord(seg, end)) {\n end = findSafeSplitPoint(seg, start, end, maxLength);\n }\n \n chunks.push(seg.slice(start, end));\n start = end;\n }\n \n return chunks;\n });\n \n return segments.filter(seg => seg.trim().length > 0);\n}\n\n/**\n * 同步文本段落时长与最小时长\n * @param {Array} textSegments - 文本段落数组\n * @param {number} totalDuration - 总时长（秒）\n * @param {number} minDuration - 最小时长（秒），默认 0.2\n * @returns {Array<{text: string, duration: number}>} 带时长的段落数组\n */\nfunction syncDurationWithMinDuration(textSegments, totalDuration, minDuration = 0.2) {\n if (!textSegments || textSegments.length === 0) return [];\n \n const totalChars = textSegments.join('').length;\n if (totalChars === 0) return [];\n \n let remainingDuration = totalDuration;\n\n // 先分配保底时长\n const segments = textSegments.map(text => {\n const duration = Math.max(\n minDuration,\n (text.length / totalChars) * totalDuration\n );\n remainingDuration -= duration;\n return { text, duration };\n });\n\n // 如果剩余时间 > 0，按字数比例再分配\n if (remainingDuration > 0) {\n const extraPerChar = remainingDuration / totalChars;\n segments.forEach(seg => {\n seg.duration += seg.text.length * extraPerChar;\n });\n }\n\n return segments;\n}\n\n/**\n * 计算文本容量\n * @param {number} screenWidth - 屏幕宽度（像素）\n * @param {number} fontSize - 字体大小（像素）\n * @param {string} text - 文本内容\n * @param {string} fontFamily - 字体族，默认 'PatuaOne'\n * @returns {Object} 包含最大字符数、平均字符宽度等信息\n */\nexport function calculateMixedTextCapacity(screenWidth, fontSize, text, fontFamily = 'PatuaOne') {\n // 统计中英文比例\n const chineseChars = text.match(/[\\u4e00-\\u9fa5]/g) || [];\n const englishChars = text.match(/[a-zA-Z]/g) || [];\n const otherChars = text.match(/[^\\u4e00-\\u9fa5a-zA-Z\\s]/g) || [];\n \n const totalChars = chineseChars.length + englishChars.length + otherChars.length;\n if (totalChars === 0) {\n return {\n maxChars: 0,\n avgCharWidth: fontSize,\n chineseCount: 0,\n englishCount: 0,\n otherCount: 0,\n chineseRatio: 0,\n englishRatio: 0\n };\n }\n \n const chineseRatio = chineseChars.length / totalChars;\n const englishRatio = englishChars.length / totalChars;\n \n // 不同字符的宽度系数\n const chineseWidth = fontSize * 1.0; // 中文字符宽度\n const englishWidth = fontSize * 0.6; // 英文字符宽度\n const otherWidth = fontSize * 0.7; // 其他字符宽度\n \n // 计算平均字符宽度\n const avgCharWidth = (chineseWidth * chineseRatio) + \n (englishWidth * englishRatio) + \n (otherWidth * (1 - chineseRatio - englishRatio));\n \n const maxChars = Math.floor(screenWidth / avgCharWidth);\n \n return {\n maxChars,\n avgCharWidth,\n chineseCount: chineseChars.length,\n englishCount: englishChars.length,\n otherCount: otherChars.length,\n chineseRatio,\n englishRatio\n };\n}\n\n/**\n * 解析字幕文本，按标点符号和时长分割\n * @param {string} text - 文本内容\n * @param {number} duration - 总时长（秒），如果未指定则自动计算\n * @param {number} maxLength - 每段最大字符数，默认 20\n * @returns {Array<{text: string, duration: number}>} 带时长的段落数组\n */\nexport function 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