forked from hswaw/labelmaker
Initial commit.
commit
9f17cf2b52
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import math
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import os
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import StringIO
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import subprocess
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import tempfile
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import time
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import cairo
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import flask
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import pango
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import pangocairo
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class App(flask.Flask):
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def __init__(self, *args, **kwargs):
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super(App, self).__init__(*args, **kwargs)
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self.last = 0
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app = App(__name__)
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class Renderer(object):
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INCH_PER_MM = 0.039
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DPI = 300
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def __init__(self, size=(19,51)):
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width, height = [int(s * self.INCH_PER_MM * self.DPI) for s in size]
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surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
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context = cairo.Context(surface)
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# fill it white, while we're at it
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context.rectangle(0, 0, width, height)
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context.set_source_rgb(1, 1, 1)
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context.fill()
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context.translate(width, 0)
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context.rotate(math.pi/2)
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# yolo
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self.width, self.height = height, width
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self.context = context
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self.surface = surface
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def export_png(self, name):
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with open(name, 'w') as f:
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self.surface.write_to_png(f)
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def render_text(self, text, fontname, x, y):
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self.context.save()
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if y != -1:
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self.context.translate(x, y)
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pangocairo_context = pangocairo.CairoContext(self.context)
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pangocairo_context.set_antialias(cairo.ANTIALIAS_SUBPIXEL)
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layout = pangocairo_context.create_layout()
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layout.set_width(self.width*pango.SCALE)
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font = pango.FontDescription(fontname)
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layout.set_font_description(font)
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layout.set_text(text)
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layout.set_alignment(pango.ALIGN_CENTER)
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if y == -1:
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self.context.translate(0, (self.height - layout.get_size()[1]/pango.SCALE)/2)
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self.context.set_source_rgb(0, 0, 0)
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pangocairo_context.update_layout(layout)
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pangocairo_context.show_layout(layout)
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self.context.restore()
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@app.route('/')
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def index():
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return flask.render_template('index.html')
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@app.route('/stuff/preview/<int:size>/')
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def stuff_preview(size):
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text = flask.request.args.get('text')
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r = Renderer()
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r.render_text(text, 'Sans {}'.format(size), 0, -1)
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sio = StringIO.StringIO()
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r.surface.write_to_png(sio)
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sio.seek(0)
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return flask.send_file(sio, mimetype='image/png')
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DELAY = 5
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@app.route('/stuff/print/<int:size>/', methods=['POST'])
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def stuff_print(size):
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last = app.last
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print last, time.time() - last
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if time.time() - last < DELAY:
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return 'Please wait {} more seconds before next print.'.format(int(DELAY - (time.time() - last)))
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text = flask.request.args.get('text')
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r = Renderer()
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r.render_text(text, 'Sans {}'.format(size), 0, -1)
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path = '/tmp/hslabel'
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f = open(path, 'w')
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r.surface.write_to_png(f)
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f.flush()
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f.close()
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time.sleep(1)
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ex = 'lpr -P DYMO_LabelWriter_450 {}'.format(path)
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os.system(ex)
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f.close()
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app.last = time.time()
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return 'ok'
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if __name__ == '__main__':
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app.run(debug=True)
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Hackerspace Printing System For Printing</title>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
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</head>
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<body>
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<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
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<div class="modal-dialog">
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<div class="modal-content">
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<div class="modal-header">
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<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
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<h4 class="modal-title">Are you sure you want to print this?</h4>
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</div>
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<div class="modal-body">
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<p>These labels cost money. Don't be an asshole, and only print stuff that is really needed.</p>
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</div>
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<div class="modal-footer">
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<button type="button" class="btn btn-default" data-dismiss="modal">Nevermind</button>
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<button type="button" id="btnconfirm" class="btn btn-primary">Yes please</button>
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</div>
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</div>
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</div>
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</div>
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<div class="container">
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<div class="page-header">
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<h1>Hackerspace Printing System For Printing Labels</h1>
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</div>
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<h3>Box 'o Stuff Label <small>For SAMLA boxes with common equipment</small></h3>
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<div class="row">
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<div class="col-md-2">
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<h4>Preview</h4>
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<img id="preview" src="/stuff/preview/70/?text=dupa" style="border-width: 1px; border-style: solid; height: 300px;"/><br/>
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</div>
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<div class="col-md-3">
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<h4>Settings</h4>
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<div class="form-group">
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<label for="fontsize">Font Size</label>
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<input id="fontsize" value="60" style="width: 100px;" class="form-control" />
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</div>
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<div class="form-group">
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<label for="labeltext">Label Text</label>
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<input id="labeltext" value="Sample Text" style="width: 200px;" class="form-control" />
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</div>
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<button type="button" id="btnpreview" class="btn btn-default btn-lg"><span class="glyphicon glyphicon-picture" aria-hidden="true"></span> Preview</button>
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<button type="button" id="btnprint" class="btn btn-warning btn-lg"><span class="glyphicon glyphicon-print" aria-hidden="true"></span> Print!</button>
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</div>
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<div class="col-md-7">
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<h4>API</h4>
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<pre>$ # To get a label preview
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$ curl http://label.waw.hackerspace.pl/stuff/preview/60/?text=foobar | feh -
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$ # To print the label
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$ curl -d "" http://label.waw.hackerspace.pl/stuff/print/60/?text=foobar</pre>
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</div>
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</div>
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</div>
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<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-growl/1.0.0/jquery.bootstrap-growl.min.js"></script>
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<script>
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$(document).ready(function() {
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var generatePreview = function() {
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var fontsize = parseInt($("#fontsize").val());
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var text = encodeURIComponent($("#labeltext").val());
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$("#preview").attr("src", "/stuff/preview/" + fontsize + "/?text=" + text);
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};
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$("#btnpreview").click(generatePreview);
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var asked = false;
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var print = function() {
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var fontsize = parseInt($("#fontsize").val());
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var text = encodeURIComponent($("#labeltext").val());
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$.post("/stuff/print/" + fontsize + "/?text=" + text, function(data) {
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if (data == "ok") {
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$.bootstrapGrowl('Printed succesfully!', {'type': 'success'});
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} else {
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$.bootstrapGrowl('An error ocurred: ' + data, {'type': 'warning'});
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}
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});
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};
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$("#btnprint").click(function() {
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if (!asked) {
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$("#myModal").modal('show');
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} else {
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print();
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}
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});
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$("#btnconfirm").click(function() {
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asked = true;
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$("#myModal").modal('hide');
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print();
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});
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generatePreview();
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});
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</script>
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</body>
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</html>
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