47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
/*exported Printer */
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function Printer(paper) {
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var _lineBuffer;
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var _line;
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function newLine() {
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_line = $('<div>').addClass('line').text(_lineBuffer);
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paper.append(_line);
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_lineBuffer = '';
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}
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newLine();
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return {
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putChar: function(val) {
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var ascii = val & 0x7f;
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var visible = val >= 0x20;
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var c = String.fromCharCode(ascii);
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if (c == '\r') {
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newLine();
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_lineBuffer = '';
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} else if (c == '\t') {
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_lineBuffer += ' ';
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} else if (c == '\010') {
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_lineBuffer = _lineBuffer.slice(0, -1);
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} else {
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if (visible) {
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_lineBuffer += c;
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}
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}
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_line.text(_lineBuffer);
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},
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clear: function() {
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_lineBuffer = '';
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paper.empty();
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newLine();
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},
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hasPrintout: function() {
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return paper.text().length();
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}
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};
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}
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