# -*- coding: utf-8 -*-
"""
Re-implementation of Argyll's webwin in pure python.
"""
import http.server
import time
from urllib.parse import unquote
from DisplayCAL.meta import name as appname, version as appversion
WEBDISP_HTML = (
r"""
%s Web Display
"""
% appname
)
WEBDISP_JS = r"""if (typeof XMLHttpRequest == "undefined") {
XMLHttpRequest = function () {
try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); }
catch (e) {}
try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); }
catch (e) {}
try { return new ActiveXObject("Microsoft.XMLHTTP"); }
catch (e) {}
throw new Error("This browser does not support XMLHttpRequest.");
};
}
var cpat = ["#000"];
var oXHR;
var pat;
function XHR_request() {
oXHR.open("GET", "/ajax/messages?" + encodeURIComponent(cpat.join("|") + "|" + Math.random()), true);
oXHR.onreadystatechange = XHR_response;
oXHR.send();
}
function XHR_response() {
if (oXHR.readyState != 4)
return;
if (oXHR.status != 200) {
return;
}
var rt = oXHR.responseText;
if (rt.charAt(0) == '\r' && rt.charAt(1) == '\n')
rt = rt.slice(2);
rt = rt.split("|")
if (rt[0] && cpat != rt) {
cpat = rt;
pat.style.background = rt[1] ? rt[0] : "transparent"; // Older dispwin compat
document.body.style.background = (rt[1] || rt[0]); // Older dispwin compat
if (rt.length == 6) {
pat.style.left = (rt[2] * 100) + "%";
pat.style.top = (rt[3] * 100) + "%";
pat.style.width = (rt[4] * 100) + "%";
pat.style.height = (rt[5] * 100) + "%";
}
}
setTimeout(XHR_request, 50);
}
window.onload = function() {
pat = document.getElementById("pattern");
oXHR = new XMLHttpRequest();
XHR_request();
};
"""
class WebWinHTTPRequestHandler(http.server.BaseHTTPRequestHandler):
"""Simple HTTP request handler with GET and HEAD commands."""
server_version = appname + "-WebWinHTTP/" + appversion
def do_GET(self):
"""Serve a GET request."""
s = self.send_head()
if s:
self.wfile.write(s.encode())
def do_HEAD(self):
"""Serve a HEAD request."""
self.send_head()
def log_message(self, format, *args):
pass
def send_head(self):
"""Common code for GET and HEAD commands.
This sends the response code and MIME headers.
Return value is either a string (which has to be written
to the outputfile by the caller unless the command was HEAD), or
None, in which case the caller has nothing further to do.
"""
if self.path == "/":
s = WEBDISP_HTML
ctype = "text/html; charset=UTF-8"
elif self.path == "/webdisp.js":
s = WEBDISP_JS
ctype = "application/javascript"
elif self.path.startswith("/ajax/messages?"):
curpat = "|".join(unquote(self.path.split("?").pop()).split("|")[:6])
while (
self.server.patterngenerator.listening
and self.server.patterngenerator.pattern == curpat
):
time.sleep(0.05)
s = self.server.patterngenerator.pattern
ctype = "text/plain; charset=UTF-8"
else:
self.send_error(404)
return
if self.server.patterngenerator.listening:
try:
self.send_response(200)
self.send_header("Cache-Control", "no-cache")
self.send_header("Content-Type", ctype)
self.end_headers()
return s
except BaseException:
pass