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import sys
import socket
import ssl
from PySide2 import QtCore, QtWidgets
def htmlescape(text):
return text.replace('<', '<').replace('>', '>')
def gem2html(gem):
html = []
state = 'text'
blanklines = 0
for line in gem.split('\n'):
if line.startswith('```'):
if state == 'pre':
newstate = 'text'
blanklines = 0
else:
newstate = 'pre'
elif state == 'pre':
newstate = 'pre'
elif line.startswith('=>'):
newstate = 'links'
elif line.startswith('* '):
newstate = 'list'
else:
newstate = 'text'
if state != 'pre':
if len(line.strip()) == 0:
blanklines += 1
if blanklines > 1:
html.append('<br/>')
continue
blanklines = 0
if state != newstate:
if state in ('links', 'list'):
html.append('</ul>')
elif state == 'pre':
html.append('</pre>')
if newstate in ('links', 'list'):
html.append('<ul>')
elif newstate == 'pre':
html.append('<pre>')
state = newstate
if line.startswith('```'):
pass
elif state == 'links':
tokens = line.split(None, 2)
if len(tokens) == 3:
_, url, text = tokens
html.append('<li><a href="{url}">{text}</a></li>'.format(url=url, text=text))
else:
_, url = tokens
html.append('<li><a href="{url}">{url}</a></li>'.format(url=url))
elif state == 'list':
html.append('<li>{}</li>'.format(line[2:]))
elif state == 'pre':
html.append(line)
else:
if line.startswith('###'):
html.append('<h3>{}</h3>'.format(line[3:].lstrip()))
elif line.startswith('##'):
html.append('<h2>{}</h2>'.format(line[2:].lstrip()))
elif line.startswith('#'):
html.append('<h1>{}</h1>'.format(line[1:].lstrip()))
else:
html.append('<p>{}</p>'.format(htmlescape(line)))
return '\n'.join(html)
def absolute_url(base, url):
"""
modifies `url` in place
"""
if not url.scheme():
url.setScheme(base.scheme())
if not url.host():
url.setHost(base.host())
if not url.path().startswith('/'):
url.setPath(base.path().rsplit('/', 1)[0] + '/' + url.path())
if url.port() == -1:
url.setPort(1965)
return url
def gem_get(url):
if len(url.path()) == 0:
url.setPath('/')
return {
'status': '32',
'meta': url.toDisplayString(),
}
context = ssl.create_default_context()
context.check_hostname = False
context.verify_mode = ssl.CERT_NONE
with socket.create_connection((url.host(), url.port())) as sock:
with context.wrap_socket(sock, server_hostname=url.host()) as ssock:
ssock.sendall('gemini://{}{}\r\n'.format(url.host(), url.path()).encode('utf8'))
fp = ssock.makefile(mode='rb')
header = fp.readline(1027)
status, meta = header.decode('utf8').split(None, 1)
if status[0] != '2':
return {
'status': status,
'meta': meta.strip(),
}
body = fp.read()
return {
'status': status,
'meta': meta.strip(),
'body': body.decode('utf8'),
}
class GViewport(QtWidgets.QTextBrowser):
hoverUrlChanged = QtCore.Signal(str)
def __init__(self, address_bar):
self._current_url = None
self._last_redirect = (QtCore.QUrl(), {})
self.address_bar = address_bar
self._hover_url = None
QtWidgets.QTextBrowser.__init__(self)
def mouseMoveEvent(self, event):
cur = self.cursorForPosition(event.localPos().toPoint())
hover_url = cur.charFormat().anchorHref()
hover_url = absolute_url(self._current_url, QtCore.QUrl(hover_url))
if hover_url != self._hover_url:
print(hover_url)
self._hover_url = hover_url
self.hoverUrlChanged.emit(self._hover_url.toString())
return super().mouseMoveEvent(event)
def loadResource(self, type_, url):
if self._last_redirect[0].toString() == url.toString():
gem = self._last_redirect[1]
else:
if not url.scheme():
url.setScheme(self._current_url.scheme())
if not url.host():
url.setHost(self._current_url.host())
if url.port() == -1:
url.setPort(1965)
if not url.path().startswith('/'):
url.setPath(self._current_url.path().rsplit('/', 1)[0] + '/' + url.path())
gem = gem_get(absolute_url(self._current_url, url))
if 'body' in gem:
html = gem2html(gem['body'])
else:
html = '<h1>{} {}</h1>'.format(gem['status'], gem['meta'])
self._current_url = url
return html
def setSource(self, url):
if url.scheme() != 'gemini':
return
gem = gem_get(absolute_url(self._current_url, url))
while gem['status'][0] == '3':
url = QtCore.QUrl(gem['meta'])
if url.port() == 1965:
url.setPort(-1)
print('redirect: {}'.format(url))
gem = gem_get(absolute_url(self._current_url, url))
self._last_redirect = (url, gem)
if url.port() == 1965:
url.setPort(-1)
print('setSource: {}'.format(url))
return super().setSource(url)
def setRawSource(self):
return self.setSource(QtCore.QUrl(self.address_bar.text()))
class GUrlBar(QtWidgets.QLineEdit):
def __init__(self):
QtWidgets.QLineEdit.__init__(self)
def setUrl(self, url):
return self.setText(url.toDisplayString())
class GBrowser(QtWidgets.QMainWindow):
def __init__(self):
super(GBrowser, self).__init__()
self.initUI()
def initUI(self):
self.statusBar().showMessage('Ready')
back = QtWidgets.QPushButton("back")
forward = QtWidgets.QPushButton("forward")
address = GUrlBar()
toolbar = QtWidgets.QToolBar()
toolbar.addWidget(back)
toolbar.addWidget(forward)
toolbar.addWidget(address)
browser = GViewport(address)
back.clicked.connect(browser.backward)
forward.clicked.connect(browser.forward)
browser.sourceChanged.connect(address.setUrl)
address.returnPressed.connect(browser.setRawSource)
browser.hoverUrlChanged.connect(self.statusBar().showMessage)
self.addToolBar(toolbar)
self.setCentralWidget(browser)
browser.setSource(QtCore.QUrl('gemini://gemini.circumlunar.space/'))
self.setGeometry(10, 10, 1024, 750)
self.setWindowTitle('Gemini Browser')
self.show()
app = QtWidgets.QApplication(sys.argv)
ex = GBrowser()
sys.exit(app.exec_())
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