108 lines
2.6 KiB
JavaScript
108 lines
2.6 KiB
JavaScript
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module.exports = function parseBMFontAscii(data) {
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if (!data)
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throw new Error('no data provided')
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data = data.toString().trim()
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var output = {
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pages: [],
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chars: [],
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kernings: []
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}
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var lines = data.split(/\r\n?|\n/g)
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if (lines.length === 0)
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throw new Error('no data in BMFont file')
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for (var i = 0; i < lines.length; i++) {
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var lineData = splitLine(lines[i], i)
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if (!lineData) //skip empty lines
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continue
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if (lineData.key === 'page') {
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if (typeof lineData.data.id !== 'number')
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throw new Error('malformed file at line ' + i + ' -- needs page id=N')
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if (typeof lineData.data.file !== 'string')
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throw new Error('malformed file at line ' + i + ' -- needs page file="path"')
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output.pages[lineData.data.id] = lineData.data.file
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} else if (lineData.key === 'chars' || lineData.key === 'kernings') {
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//... do nothing for these two ...
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} else if (lineData.key === 'char') {
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output.chars.push(lineData.data)
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} else if (lineData.key === 'kerning') {
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output.kernings.push(lineData.data)
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} else {
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output[lineData.key] = lineData.data
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}
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}
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return output
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}
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function splitLine(line, idx) {
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line = line.replace(/\t+/g, ' ').trim()
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if (!line)
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return null
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var space = line.indexOf(' ')
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if (space === -1)
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throw new Error("no named row at line " + idx)
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var key = line.substring(0, space)
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line = line.substring(space + 1)
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//clear "letter" field as it is non-standard and
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//requires additional complexity to parse " / = symbols
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line = line.replace(/letter=[\'\"]\S+[\'\"]/gi, '')
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line = line.split("=")
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line = line.map(function(str) {
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return str.trim().match((/(".*?"|[^"\s]+)+(?=\s*|\s*$)/g))
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})
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var data = []
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for (var i = 0; i < line.length; i++) {
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var dt = line[i]
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if (i === 0) {
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data.push({
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key: dt[0],
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data: ""
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})
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} else if (i === line.length - 1) {
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data[data.length - 1].data = parseData(dt[0])
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} else {
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data[data.length - 1].data = parseData(dt[0])
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data.push({
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key: dt[1],
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data: ""
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})
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}
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}
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var out = {
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key: key,
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data: {}
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}
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data.forEach(function(v) {
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out.data[v.key] = v.data;
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})
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return out
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}
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function parseData(data) {
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if (!data || data.length === 0)
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return ""
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if (data.indexOf('"') === 0 || data.indexOf("'") === 0)
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return data.substring(1, data.length - 1)
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if (data.indexOf(',') !== -1)
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return parseIntList(data)
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return parseInt(data, 10)
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}
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function parseIntList(data) {
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return data.split(',').map(function(val) {
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return parseInt(val, 10)
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})
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}
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