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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| /* jshint undef: true, unused: true, browser:true, devel: true */ | ||
| /* global define */ | ||
|
|
||
| define( | ||
| [ | ||
| "./ean_reader" | ||
| ], | ||
| function(EANReader) { | ||
| "use strict"; | ||
|
|
||
| function UPCEReader() { | ||
| EANReader.call(this); | ||
| } | ||
|
|
||
| var properties = { | ||
| CODE_FREQUENCY : {value: [ | ||
| [ 56, 52, 50, 49, 44, 38, 35, 42, 41, 37 ], | ||
| [7, 11, 13, 14, 19, 25, 28, 21, 22, 26]]}, | ||
| STOP_PATTERN: { value: [1 / 6 * 7, 1 / 6 * 7, 1 / 6 * 7, 1 / 6 * 7, 1 / 6 * 7, 1 / 6 * 7]} | ||
| }; | ||
|
|
||
| UPCEReader.prototype = Object.create(EANReader.prototype, properties); | ||
| UPCEReader.prototype.constructor = UPCEReader; | ||
|
|
||
| UPCEReader.prototype._decodePayload = function(code, result, decodedCodes) { | ||
| var i, | ||
| self = this, | ||
| codeFrequency = 0x0; | ||
|
|
||
| for ( i = 0; i < 6; i++) { | ||
| code = self._decodeCode(code.end); | ||
| if (code.code >= self.CODE_G_START) { | ||
| code.code = code.code - self.CODE_G_START; | ||
| codeFrequency |= 1 << (5 - i); | ||
| } else { | ||
| codeFrequency |= 0 << (5 - i); | ||
| } | ||
| result.push(code.code); | ||
| decodedCodes.push(code); | ||
| } | ||
| self._determineParity(codeFrequency, result); | ||
|
|
||
| return code; | ||
| }; | ||
|
|
||
| UPCEReader.prototype._determineParity = function(codeFrequency, result) { | ||
| var self =this, | ||
| i, | ||
| nrSystem; | ||
|
|
||
| for (nrSystem = 0; nrSystem < self.CODE_FREQUENCY.length; nrSystem++){ | ||
| for ( i = 0; i < self.CODE_FREQUENCY[nrSystem].length; i++) { | ||
| if (codeFrequency === self.CODE_FREQUENCY[nrSystem][i]) { | ||
| result.unshift(nrSystem); | ||
| result.push(i); | ||
| return; | ||
| } | ||
| } | ||
| } | ||
| }; | ||
|
|
||
| UPCEReader.prototype._convertToUPCA = function(result) { | ||
| var upca = [result[0]], | ||
| lastDigit = result[result.length - 2]; | ||
|
|
||
| if (lastDigit <= 2) { | ||
| upca = upca.concat(result.slice(1, 3)) | ||
| .concat([lastDigit, 0, 0, 0, 0]) | ||
| .concat(result.slice(3, 6)); | ||
| } else if (lastDigit === 3) { | ||
| upca = upca.concat(result.slice(1, 4)) | ||
| .concat([0 ,0, 0, 0, 0]) | ||
| .concat(result.slice(4,6)); | ||
| } else if (lastDigit === 4) { | ||
| upca = upca.concat(result.slice(1, 5)) | ||
| .concat([0, 0, 0, 0, 0, result[5]]); | ||
| } else { | ||
| upca = upca.concat(result.slice(1, 6)) | ||
| .concat([0, 0, 0, 0, lastDigit]); | ||
| } | ||
|
|
||
| upca.push(result[result.length - 1]); | ||
| return upca; | ||
| }; | ||
|
|
||
| UPCEReader.prototype._checksum = function(result) { | ||
| return EANReader.prototype._checksum.call(this, this._convertToUPCA(result)); | ||
| }; | ||
|
|
||
| UPCEReader.prototype._findEnd = function(offset, isWhite) { | ||
| isWhite = true; | ||
| return EANReader.prototype._findEnd.call(this, offset, isWhite); | ||
| }; | ||
|
|
||
| UPCEReader.prototype._verifyTrailingWhitespace = function(endInfo) { | ||
| var self = this, | ||
| trailingWhitespaceEnd; | ||
|
|
||
| trailingWhitespaceEnd = endInfo.end + ((endInfo.end - endInfo.start)/2); | ||
| if (trailingWhitespaceEnd < self._row.length) { | ||
| if (self._matchRange(endInfo.end, trailingWhitespaceEnd, 0)) { | ||
| return endInfo; | ||
| } | ||
| } | ||
| }; | ||
|
|
||
| return (UPCEReader); | ||
| } | ||
| ); |